CN117231644A - Torque limiting device and vehicle - Google Patents
Torque limiting device and vehicle Download PDFInfo
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- CN117231644A CN117231644A CN202210641238.7A CN202210641238A CN117231644A CN 117231644 A CN117231644 A CN 117231644A CN 202210641238 A CN202210641238 A CN 202210641238A CN 117231644 A CN117231644 A CN 117231644A
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- side plate
- limiting device
- spring
- torque limiting
- carrier
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- 230000005540 biological transmission Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Abstract
The present invention relates to a torque limiting device for a vehicle, the torque limiting device having: a carrier (4) for connecting a torque input, a first side plate (1) and a second side plate (2) arranged on both sides of the carrier (4) in an axial direction, a first friction element (3) between the first side plate (1) and the carrier (4) and a second friction element (7) between the second side plate (1) and the carrier (4), a plurality of spring elements (5), the spring elements (5) being arranged on a side of the second side plate (2) facing away from the second friction element (7). -a fixed connection (6), said fixed connection (6) securing said first side plate (1) and said spring element (5) in an axial direction.
Description
Technical Field
The present invention relates to the field of vehicle vibration damping, and in particular to a torque limiting device for a vehicle and a vehicle comprising the torque limiting device.
Background
In motor vehicles, if excessive torque is transmitted to the transmission, damage to various transmission devices including gears may be caused. Therefore, it is necessary to provide a torque limiting device in the vehicle. In the prior art, torque limiting devices have typically been made to slip through friction plates to prevent the transmitted torque from exceeding a predetermined threshold.
Such a torque limiting device is known from CN 113015859A, which has two covers between which are provided a drive plate attached to each friction element in the inner surface of the cover and a pressure plate in contact with the friction element. A diaphragm spring is provided in contact with the other side of the pressure plate, and applies pressure to the pressure plate to generate pressure between the friction element and the pressure plate, thereby controlling the degree of limitation of the input torque.
In practical production, it is found that the torque transmission device in the prior art has a complex structure and needs more structural members. In addition, since the diaphragm spring needs to apply pressure to the outer peripheral surface of the pressure plate, it is generally designed to have the same size as the pressure plate, the structure is large, replacement is not easy, and manufacturing cost is increased.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an improved torque limiting device, which improves the transmission efficiency of friction torque on the premise of simplifying the structure and reducing the cost.
The problem is solved by a torque limiting device for a vehicle. The torque limiting device has:
a carrier for connecting the torque input,
a first side plate member and a second side plate member arranged on both sides of the carrier in the axial direction, respectively, a first friction member between the first side plate member and the carrier, and a second friction member between the second side plate member and the carrier,
a plurality of spring elements which are arranged on the side of the second side plate element facing away from the second friction element in the axial direction and rest against the second side plate element.
-a fixed connection passing axially through and securing the first side plate and the spring element axially.
In the technical solution of the present invention, unless otherwise specified, the axial direction, the radial direction, and the circumferential direction refer to the axial direction, the radial direction, and the circumferential direction, respectively, of the power shaft of the torque limiting device for a vehicle. According to the technical scheme of the invention, the friction pad or the pressure plate arranged between the friction piece and the side plate piece in the prior design is omitted, so that structural components are reduced, and the manufacturing cost is reduced. According to the design scheme of the invention, the side plate can directly compress the friction piece, so that the transmission efficiency of friction torque is improved. In addition, the technical scheme of the invention also uses a plurality of spring pieces to replace a single large spring, the plurality of spring pieces are circumferentially arranged on the second side plate, and materials and component cost are reduced on the premise of providing the same elastic force.
According to a preferred embodiment of the invention, the fixed connection is a rivet which passes through the first side plate, the first friction member, the carrier member, the second friction member, the second side plate and the spring member in this order in the axial direction. The rivet piece is a common piece and has lower use cost. The rivet piece passes through the first side plate piece, the first friction piece, the bearing piece, the second friction piece, the second side plate piece and the spring piece in sequence, and the first side plate piece and the spring piece which are positioned at two ends are fixed in the axial direction, so that the rivet piece and the spring piece are compressed together in the axial direction, the transmission efficiency of friction torque is improved, and the structure can be more compact.
According to a preferred embodiment of the invention, the fastening connection has a cap, wherein the outer diameter of the cap is greater than the bore diameter of the spring element, and an axial stop for the spring element is formed by the cap. It is also preferred that the fastening connection has a tail, wherein a groove is provided on the tail, in which groove the first side plate is snapped in, forming an axial stop for the first side plate in a simple configuration. Alternatively, the tail of the fastening connection has a radial flange which is inserted into the first side plate and which forms an axial stop for the first side plate. The fixing connection can thus fasten the spring element and the first side plate element in a very simple manner, reducing the production costs.
According to a preferred embodiment of the invention, the spring element is a disk spring, which is capable of providing the required spring force with a minimum axial distance. It is also preferred that the number of spring elements is the same as the number of fixed connection elements, with the minimum number of parts possible achieving the desired technical effect. Furthermore, the spring members are preferably evenly distributed in the circumferential direction to provide an even elastic force on the second side plate, avoiding uneven forces being applied to the second side plate in the axial direction. It is further preferred that 8 spring elements are provided on the second side plate member, and that 8 small spring elements replace a single large spring element, thereby reducing material and further reducing costs while providing the same axial spring force.
The technical problem to be solved by the present invention is also solved by a vehicle comprising a torque limiting device as described above. The vehicle may be a conventional non-hybrid vehicle using only the engine as a power source, or may be a hybrid vehicle including the engine and at least one electric motor as power sources, or may even be a hybrid vehicle having a dual clutch.
Drawings
Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. The attached drawings are as follows:
FIG. 1 shows a cross-sectional view of a torque limiting device for a vehicle in the prior art;
FIG. 2 illustrates a partial cross-sectional view of a torque limiting device designed in accordance with the invention;
FIG. 3 illustrates a schematic perspective view of a torque limiting device designed in accordance with the invention;
fig. 4 shows an exploded view of a torque limiting device designed according to this invention.
In the present invention, unless otherwise specified, the axial direction, the radial direction, and the circumferential direction refer to the axial direction, the radial direction, and the circumferential direction, respectively, of the torque limiting device for a vehicle; axial one side refers to the left side in fig. 3, and axial other side refers to the right side in fig. 3; the radially outer side refers to a side (upper side in fig. 3) radially away from the central axis of the torque limiter device for a vehicle, and the radially inner side refers to a side (lower side in fig. 3) radially close to the central axis of the torque limiter device for a vehicle.
Detailed Description
As shown in fig. 1, in one possible design of a torque limiter device for a vehicle, for example, for a hybrid system, there are provided a carrier plate 105 that transmits torque by friction torque, two side plates 101, 102, and a diaphragm spring 104 that applies a spring force to them. The diaphragm spring 104 exerts a spring force through the friction pad 103. The two side plates 101, 102 are fastened together by means of a coupling, for example a rivet of cylindrical shape, such that the side plates 101, 102 of the torque limiting device press against the intermediate part. The diaphragm spring 104 is compressed between the two side plates 101, 102. Because the size of the friction pad 103 needs to be substantially identical to the diaphragm spring 104, the overall torque limiting device is more component and costly.
Fig. 2 and 3 illustrate a torque limiting device designed in accordance with the present invention. Specifically, in this embodiment, the torque limiting device includes: the torque input device comprises a carrier 4 for connecting a torque input, a first side plate 1 and a second side plate 2 arranged on both sides of the carrier 4 in an axial direction, a first friction member 3 between the first side plate 1 and the carrier 4, a second friction member 7 between the second side plate 1 and the carrier 4, a plurality of spring members 5 and a fixed connection 6, wherein the fixed connection 6 secures the first side plate 1 and the spring members 5 in the axial direction. In the present embodiment, the carrier 4 may be connected to an input shaft of a power source for receiving torque from the power source of the vehicle, and the carrier 4 is drivingly coupled to the two side plate members 1, 2 via the two friction members 3, 7 by friction torque between the carrier 4 and the two friction members 3, 7. The two side plates 1, 2 are arranged at a distance from each other in the axial direction a via a carrier 4. According to the design of the invention, the fixed connection 6 is made to axially fasten the first side piece 1 and the spring element 5, thereby exerting pressure on the components between them, and the torque can be transferred better as the first and second side pieces 1, 2 are in direct contact with the friction elements 3, 7. In addition, by this construction, the spacer member can be eliminated, saving components and reducing costs.
As shown in fig. 3, the fixed connection 6 is a rivet member that penetrates the first side plate member 1, the first friction member 3, the carrier member 4, the second friction member 7, the second side plate member 2, and the spring member 5 in this order in the axial direction. The fixed connection 6 has a cap 6a, and the outer diameter of the cap 6a is larger than the aperture of the spring element, an axial stop for the spring element 5 being formed by the cap 6 a. The fixed connection 6 further has a tail portion 6b, wherein a groove is provided on the tail portion 6b, and the first side plate 1 is clamped in the groove. A further conceivable alternative is that the tail portion 6b of the fastening connection 6 has a radial flange, which tail portion 6b is inserted into the first side plate 1 and which radial flange forms an axial stop for the first side plate 1.
Fig. 4 shows an exploded view of a torque limiting device according to the invention. In the present embodiment, 8 spring elements 5 and corresponding 8 fixing elements 6 are provided. The spring members are uniformly distributed along the circumferential direction of the second side plate member to provide balanced elastic force to the second side plate member. The spring member 5 is a belleville spring, and by replacing the single large spring member with 8 small spring members, the same axial spring force as that of the single spring member can be provided, and the material and the cost can be reduced.
It should be understood that the above-described embodiments are merely exemplary and are not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the above-described embodiments without departing from the scope of the present invention. It is also conceivable that although 8 spring members 5 as belleville springs are provided in the above embodiment, the present invention is not limited thereto. For example, a different number of spring elements of different patterns may be provided. Conventional means conforming to the innovative idea of the present invention are also within the scope of the invention.
List of reference numerals
1. First side plate
2. Second side plate
3. First friction piece
4. Bearing piece
5. Spring element
6. Fixed connecting piece
6a cap
6b tail part
7. Second friction piece
8. Friction pad
9. Diaphragm spring
101. Side plate
102. Side plate
103. Friction pad
104. Diaphragm spring
105. Carrier plate
Claims (10)
1. A torque limiting device for a vehicle, the torque limiting device having:
a carrier (4) as a torque input,
a first side plate (1) and a second side plate (2) arranged axially on either side of the carrier (4),
a first friction element (3) between the first side plate element (1) and the carrier element (4) and a second friction element (7) between the second side plate element (1) and the carrier element (4),
a plurality of spring elements (5), which spring elements (5) are arranged axially on the side of the second side plate element (2) facing away from the second friction element (7) and bear against the second side plate element (2),
-a fixed connection (6), said fixed connection (6) passing axially through said first side plate (1) and said spring element (5) and securing them axially.
2. Torque limiter according to claim 1, characterized in that the fixed connection (6) is a rivet passing axially through the first side plate (1), the first friction member (3), the carrier member (4), the second friction member (7), the second side plate (2) and the spring member (5) in sequence.
3. Torque limiting device according to claim 1, characterized in that the stationary connection (6) has a cap (6 a), wherein the outer diameter of the cap (6 a) is larger than the aperture of the spring element (5).
4. A torque limiting device according to claim 3, characterized in that the fixed connection (6) is formed with a tail (6 b), wherein a groove is formed between the tail (6 b) and the cap (6 a), in which groove the first side plate (1) is snapped.
5. A torque limiting device according to claim 3, characterized in that the fixed connection (6) has a tail (6 b), wherein the tail (6 b) has a radial flange, the tail (6 b) being inserted into the first side plate (1) and the radial flange constituting an axial stop for the first side plate (1).
6. Torque limiting device according to claim 1, characterized in that the spring element (5) is a belleville spring.
7. Torque limiting device according to claim 6, characterized in that the number of spring elements (5) is the same as the number of fixed connection elements (6).
8. Torque limiting device according to claim 7, characterized in that the spring elements (5) are distributed evenly in the circumferential direction.
9. Torque limiting device according to any one of claims 1 to 8, characterized in that it has 8 of said spring elements (5).
10. A vehicle comprising the torque limiting device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641238.7A CN117231644A (en) | 2022-06-07 | 2022-06-07 | Torque limiting device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641238.7A CN117231644A (en) | 2022-06-07 | 2022-06-07 | Torque limiting device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117231644A true CN117231644A (en) | 2023-12-15 |
Family
ID=89083148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210641238.7A Pending CN117231644A (en) | 2022-06-07 | 2022-06-07 | Torque limiting device and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117231644A (en) |
-
2022
- 2022-06-07 CN CN202210641238.7A patent/CN117231644A/en active Pending
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