CN102966686A - Brake caliper assembly of electronic parking brake system for vehicle - Google Patents
Brake caliper assembly of electronic parking brake system for vehicle Download PDFInfo
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- CN102966686A CN102966686A CN2012104990798A CN201210499079A CN102966686A CN 102966686 A CN102966686 A CN 102966686A CN 2012104990798 A CN2012104990798 A CN 2012104990798A CN 201210499079 A CN201210499079 A CN 201210499079A CN 102966686 A CN102966686 A CN 102966686A
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Abstract
The invention discloses a brake caliper assembly of an electronic parking brake system for a vehicle. The brake caliper assembly comprises an executing mechanism assembly and parking brake calipers, wherein the executing mechanism assembly is arranged at the head parts of the parking brake calipers and connected with the parking brake calipers through screws; the parking brake calipers comprise a brake caliper body, a parking screw sleeve, a parking screw rod, a piston and friction plates; and antifriction plates are arranged at the end parts of the parking screw rod. Aiming at the problems of low possibility of reduction of axial space, non contribution to arrangement of the axial space of the parking brake caliper assembly, high research, development and manufacturing costs, low product competitiveness and the like in the using process of a needle roller thrust bearing in the prior art, the antifriction plates can be remarkably shortened in axial size, so that the axial space of the parking brake caliper assembly is reduced, the cost of parts is lowered, and the product assembly performance is improved at the same time. Moreover, the brake caliper assembly has the advantage that the complete vehicle kerb mass is relatively reduced.
Description
Technical field
The present invention is applied to the vehicle chassis system, belongs to vehicle electronic braking system manufacturing technology field, specifically, relates to a kind of brake caliper assembly of vehicle electronic parking braking system.Vehicle involved in the present invention includes but not limited to petrol engine vehicle, diesel-engine road vehicle, Natural gas vehicles, methanol fuel vehicle, motor vehicle driven by mixed power and pure electric vehicle etc.
Background technique
At present, in vehicle electronic braking system manufacturing technology field, parking braking system field particularly, the application of electronic brake system is more and more extensive, especially quite general in the application of European and American areas electronic brake system, and to the future development that the electronic parking system is disposed as vehicle standard.Domestic electronic parking is in recent years also in fast development, the requirement of all having considered the electronic parking configuration in grinding vehicle of each large main engine factory.
Electronic brake system generally is divided into two kinds of structural types, and a kind of is the electronic brake system of drag-line, and described drag-line parking braking system is made of parking switch, Parking control and Executive Module assembly, brake cable and Parking Brake usually.This kind wire grip formula electronic parking system exist Parking usefulness low, can not directly controlled wheel, Function Extension is limited, control is inconvenient, long-time Parking was easily lost efficacy, dynamic uneven about Parking, shortcoming that service brake is dawdled, brake cable low temperature easily freezes etc. can't overcome, especially single electric system left and right wheels is subject to an Electric Machine Control simultaneously, the situation that can cause Parking to be lost efficacy in case motor breaks down.Gradually atrophy of the application of the electronic parking system of this kind form.
Another kind is the integrated type electrical parking system, and the electronic parking system of this kind form is the direction of electronic brake system development, and it is incorporated into motor and brake caliper together, and controller is independently controlled left and right sides brake calipers respectively, and security of system is higher; Owing to be directly to control brake calipers, system response time is faster; Transmission link in the middle of integrated actuator design has reduced, the reliability of assurance system; About controlling method independently, make system under the prerequisite of partial fault, also can guarantee the Parking reliability, increase vehicle Parking safety; System has more automatic control function, has improved ride comfort.Because the plurality of advantages of integrated type electrical Parking, so its market application foreground is in rising trend.
Integrated type electrical parking system of the prior art is comprised of control unit, parking switch and parking actuator usually, and wherein parking actuator is important power unit.Parking actuator is made of actuating mechanism assembly and parking braking clamp usually, wherein the direct current generator output torque in the actuating mechanism assembly through synchronous belt drive mechanism and Involute planetary gear drive with small teeth difference mechanism slow down increase turn round after, transfer straight line motion by the slip screw driving mechanism in the parking braking clamp to rotatablely moving, adopt the mode of Parking swivel nut pushing piston and friction plate that brake disc is clamped braking.In the parking braking process, in order to improve the Parking output clamping force of brake caliper, realizes antifriction and improve the output clamping force with a kind of needle roller thrust bearing in the stopping caliper in the present integrated form parking actuator, but there are many technical problems in this integrated type electrical parking system:
1, the needle roller thrust bearing axial dimension in the integrated type electrical parking system of the prior art shortens difficulty, is unfavorable for the shortening of stopping caliper axial dimension, and then is unfavorable for the layout of stopping caliper axial space.
Present development along with the electronic parking technology, one of them development trend is exactly from the lighter A level of run-of-the-mill, the B level, C level car field is to quality heavier large SUV and MPV future development, this just requires electronic parking can export higher clamping force, require simultaneously the bearing capacity Synchronous lifting of its affiliated component, and one of means that generally improve bearing capacity as the needle roller thrust bearing of one of vital part are exactly to strengthen the needle roller diameter, the axial dimension of needle bearing is increased, be unfavorable for the shortening of stopping caliper axial dimension, and then be unfavorable for the layout of stopping caliper axial space.
2, the needle roller thrust bearing relative cost in the integrated type electrical parking system of the prior art is high, drives whole electronic parking system cost and rises, and is unfavorable for that the market competitiveness promotes.
Because needle roller thrust bearing is important precision drive part, its intensity of having relatively high expectations, wear resistance, efficient and reliability, so its research and development and cost of production are relatively high, are unfavorable for competitiveness of product in market lifting.
3, integrated type electrical parking system assembling process of products of the prior art is inconvenient, causes easily misloading, neglected loading problem, increases the failure probability of product.
The at present use of needle roller thrust bearing normally two pads (roller raceway) and needle bearing is used, therefore just require the order of pad and needle roller assembling can not be wrong when producing assembling, simultaneously requirement can not the neglected loading pad, otherwise all can cause the problem of misloading, neglected loading, increase the probability that product lost efficacy because of assembling.
Summary of the invention
Technical problem to be solved by this invention is, the needle roller thrust bearing that adopts in the stopping caliper for present integrated type electrical parking actuator exists axial dimension to shorten difficulty and is unfavorable for the technical problems such as axial space is arranged, research and development manufacture cost height lacks the market competitiveness, assembling process of products is poor, and a kind of brake caliper assembly of vehicle electronic parking braking system is provided.
Technical conceive of the present invention is, on the basis of original integrated type electrical parking actuator, in conjunction with following light-weighted development trend, evade above-mentioned because the drawback that needle bearing brings, and design a kind of brake caliper assembly of new electronic brake system, utilize the needle roller thrust bearing in the alternative former parking braking clamp of existing new material and new technology development antifriction sheet out, namely cooperate at antifriction sheet of Parking screw head flange plate assembling and braking clamp body inner bottom surface, because this antifriction sheet is to employ new technology, new process is made, usually integral surface sprays teflon, the materials such as molybdenum disulfide or modification composite coating, therefore has the intensity height, the advantage that wear resistance is good, the axial dimension of comparing the end face bearing with needle roller thrust bearing is little, and it is consistent with needle roller thrust bearing that transmission efficiency keeps, and then solved the axial space shortening difficulty of using needle roller thrust bearing to cause, cost is high, the problems such as assembly process process is poor.
Technological scheme provided by the present invention is, a kind of brake caliper assembly of vehicle electronic parking braking system, comprise actuating mechanism assembly and parking braking clamp, described actuating mechanism assembly is arranged in described parking braking clamp head, described actuating mechanism assembly and described parking braking clamp interconnect by screw, described parking braking clamp comprise braking clamp body, the Parking swivel nut, the Parking screw rod, piston and friction plate, described brake disc is arranged between the described friction plate, described Parking screw rod cooperates with described Parking swivel nut, is provided with the antifriction apparatus of the origin or beginning spherical bearing effect of laminar minimizing surface of contact friction torque in the end of described Parking screw rod.
Described antifriction apparatus is the antifriction sheet, and described antifriction sheet contacts with described Parking screw rod, the friction torque between minimizing and the described Parking screw rod surface of contact.
Be provided with circular hole in the middle of the described antifriction sheet, described antifriction sheet is assemblied in described Parking screw head by the circular hole of centre.
Described antifriction sheet one side contacts cooperation with Parking screw rod flanged surface, and opposite side contacts cooperation with the interior bottom plane of braking clamp body.
Described antifriction sheet material is metal material or high strength wear resistant plastics, and described antifriction sheet local surfaces or integral surface are provided with coating layer, and described coating layer is teflon, molybdenum disulfide, graphite or other composite coating.
Described actuating mechanism assembly comprises that motor, electrical machine belt pulley, belt, toothed belt wheel assembly, planetary gear train speed reducing mechanism, upper shell, lower shell body consist of, described electrical machine belt pulley links to each other with described toothed belt wheel assembly by belt, and described toothed belt wheel assembly and planetary gear train speed reducing mechanism carry out transmission by transmission shaft.
The double reduction mechanism that described planetary gear train speed reducing mechanism is made of some central gears, gear ring, output shaft assembly, described toothed belt wheel assembly drives the gear for two stage planetary gear train reducing gear in the compound gear ring that is fixed on the lower shell body by the profile of tooth transmission shaft, described gear for two stage planetary gear train reducing gear is output as the rotation of planet carrier, and described planet carrier is as the output shaft assembly.
Described parking braking clamp comprise braking clamp body, the antifriction sheet, piston packing, the Parking swivel nut, the Parking screw rod, piston and friction plate, between described planetary gear train speed reducing mechanism and the parking braking clamp by rotatablely moving by spline joint input between Parking screw rod and the output shaft assembly, and the Parking screw rod, the Parking swivel nut then will rotatablely move and be converted into straight line motion, the conical surface of described Parking swivel nut cooperates with piston, pushing piston advances, described piston is outside to be contacted with friction plate, friction plate is contained on the support, brakes thereby be free to slide the clamping brake disc along the piston centerline direction.
Adopt technological scheme provided by the present invention, can effectively solve some problems of using needle roller thrust bearing to cause in the existing integrated form parking brake caliper, on the one hand because the use of needle roller thrust bearing need to increase the pad of two carryings, especially when increasing bearing capacity, generally playing axial size needs obviously to increase, and then increased the axial length of parking braking clamp, be unfavorable for the layout of parking braking clamp on axial space, directly cause sometimes the parking braking clamp to arrange, and new antifriction sheet is an end face bearing in essence, and its axial space can shorten; On the other hand, needle roller thrust bearing belongs to accurate carrying component, and its research and development, cost of making are also higher, lack competitiveness in day by day fierce market competition environment, and the end face bearing is compared the cost of needle roller thrust bearing and can be reduced; Simultaneously owing to the use owing to needle roller thrust bearing in the Product Assembly process need to be assembled two pads and a bearing together, and it has the requirement of assemble sequence, cause procedure quality control difficulty to increase, the problem probability of happening such as the misloading that causes because of assembling, neglected loading will increase, and only use an end face bearing these problems then can not occur; In addition, adopt technological scheme provided by the present invention, can also reduce the quality of part and then reduce complete vehicle curb weight, be conducive to the realization of automotive light weight technology target.There is the antifriction sheet to come bearing axial pushing force between described braking clamp body and the Parking screw rod, is assemblied in Parking screw head and braking clamp body inner bottom surface, substitute original needle roller thrust bearing, for reducing the face friction torque between Parking screw rod and the braking clamp body.Described antifriction sheet is through special processing, keeps and the same performance of needle roller thrust bearing in intensity, efficient and wear resistance, has simultaneously that axial dimension is little, lightweight, cost is low, is easy to the advantage such as assembling.
Description of drawings
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is structural representation of the present invention;
Wherein, 1. lower shell body, 2. motor, 3. upper shell, 4. belt, 5. electrical machine belt pulley, 6. supporting frame, 7. gear ring, 8. toothed belt wheel body, 9. transmission shaft, 10. toothed belt wheel assembly, 11. centrepins, 12. central gear, 13. planetary gear train speed reducing mechanisms, 14. output shaft assemblies, 15. antifriction sheets, 16. the Parking screw rod, 17. Parking swivel nuts, 18. piston packings, 19. pistons, 20. brake disc, 21. friction plates, 22, braking clamp body.
Embodiment
As shown in Figure 1, technological scheme provided by the present invention is, a kind of brake caliper assembly of vehicle electronic parking braking system, comprise actuating mechanism assembly and parking braking clamp, described actuating mechanism assembly is arranged in described parking braking clamp head, described actuating mechanism assembly and described parking braking clamp interconnect by screw, described parking braking clamp comprise braking clamp body 22, Parking swivel nut 17, Parking screw rod 16, piston 19 and friction plate 21, described brake disc 20 is arranged between the described friction plate 21, described Parking screw rod 16 cooperates with described Parking swivel nut 17, is provided with the antifriction apparatus of the origin or beginning spherical bearing effect of laminar minimizing surface of contact friction torque in the end of described Parking screw rod 16.Described antifriction apparatus is antifriction sheet 15, and described antifriction sheet 15 contacts with described Parking screw rod 16, the friction torque between minimizing and described Parking screw rod 16 surface of contact.Be provided with circular hole in the middle of the described antifriction sheet 15, described antifriction sheet 15 is assemblied in described Parking screw rod 16 heads by the circular hole of centre.Described antifriction sheet one side contacts cooperation with Parking screw rod 16 flanged surfaces, and opposite side contacts cooperation with braking clamp body 22 interior bottom planes.Described antifriction sheet 15 materials are metal material or high strength wear resistant plastics, and described antifriction sheet 15 local surfaces or integral surface are provided with coating layer, and described coating layer is teflon, molybdenum disulfide, graphite or other composite coating.
The brake caliper assembly of a kind of vehicle electronic parking braking system of technological scheme provided by the present invention comprises actuating mechanism assembly and parking braking clamp.Described actuating mechanism assembly is arranged in upper shell 3 and the lower shell body 1 formed semi-enclosed zone, described actuating mechanism assembly comprises power plant and transmitting set, described power plant are motor 2, and described motor 2 is provided with electrical machine belt pulley 5, and described motor 2 is located at a side of described lower shell body 1.Described transmitting set comprises that belt 4, toothed belt wheel assembly 10, planetary gear train speed reducing mechanism 13 consist of.Described planetary gear train speed reducing mechanism 13 is the double reduction mechanisms that are made of some central gears 12, gear ring 7, output shaft assembly 14.Described electrical machine belt pulley 5 links to each other with described toothed belt wheel assembly 10 by belt 4, and described toothed belt wheel assembly 10 carries out transmission with planetary gear train speed reducing mechanism 13 by transmission shaft 9.Described gear for two stage planetary gear train reducing gear 13 output movements are the rotation of planet carrier, and described planet carrier is output shaft assembly 14.Described actuating mechanism assembly is connected with described parking braking clamp, described parking braking clamp comprise braking clamp body 22, antifriction sheet 15, Parking screw rod 16, Parking swivel nut 17, piston 19 and friction plate 21, and described output shaft assembly 14 rotatablely moving of output are converted into straight line motion through the Parking screw rod 16 among the parking braking clamp and Parking swivel nut 17.Pass through spline fitted between described Parking screw rod 16 and the output shaft assembly 14, the conical surface of described Parking swivel nut 17 cooperates with piston 19, pushing piston 19 advances, described piston 19 outsides contact with friction plate 21, friction plate 21 is contained on the support, can be free to slide along piston 19 centerline directions, thereby realize that Parking clamps action.
Above-mentioned mode of execution is used for the present invention that explains; rather than to unique restriction of the present invention; the related variation scheme of carrying out on the basis of technical conceive of the present invention is all in protection scope of the present invention; any use that invention is made is revised and change, all fallen within protection scope of the present invention.
Claims (8)
1. the brake caliper assembly of a vehicle electronic parking braking system, comprise actuating mechanism assembly and parking braking clamp, described actuating mechanism assembly is arranged in described parking braking clamp head, described actuating mechanism assembly and described parking braking clamp interconnect by screw, it is characterized in that, described parking braking clamp comprise braking clamp body (22), Parking swivel nut (17), Parking screw rod (16), piston (19) and friction plate (21), described brake disc (20) is arranged between the described friction plate (21), described Parking screw rod (16) cooperates with described Parking swivel nut (17), is provided with the antifriction apparatus of laminar origin or beginning spherical bearing effect in the end of described Parking screw rod (16).
2. the brake caliper assembly of a kind of vehicle electronic parking braking system according to claim 1, it is characterized in that, described antifriction apparatus is antifriction sheet (15), described antifriction sheet (15) contacts with described Parking screw rod (16), the friction torque between minimizing and described Parking screw rod (16) surface of contact.
3. the brake caliper assembly of a kind of vehicle electronic parking braking system according to claim 1 and 2, it is characterized in that, be provided with circular hole in the middle of the described antifriction sheet (15), described antifriction sheet (15) is assemblied in described Parking screw rod (16) head by the circular hole of centre.
4. the brake caliper assembly of a kind of vehicle electronic parking braking system according to claim 3 is characterized in that, described antifriction sheet one side contacts cooperation with Parking screw rod (16) flanged surface, and opposite side contacts cooperation with the interior bottom plane of braking clamp body (22).
5. the brake caliper assembly of a kind of vehicle electronic parking braking system according to claim 4, it is characterized in that, described antifriction sheet (15) material is metal material or high strength wear resistant plastics, described antifriction sheet (15) local surfaces or integral surface are provided with coating layer, and described coating layer is teflon, molybdenum disulfide, graphite or other composite coating.
6. the brake caliper assembly of a kind of vehicle electronic parking braking system according to claim 5, it is characterized in that, described actuating mechanism assembly comprises that motor (2), electrical machine belt pulley (5), belt (4), toothed belt wheel assembly (10), planetary gear train speed reducing mechanism (13), upper shell (3), lower shell body (1) consist of, described electrical machine belt pulley (5) links to each other with described toothed belt wheel assembly (10) by belt (4), and described toothed belt wheel assembly (10) carries out transmission with planetary gear train speed reducing mechanism (13) by transmission shaft (9).
7. the brake caliper assembly of a kind of vehicle electronic parking braking system according to claim 6, it is characterized in that, described planetary gear train speed reducing mechanism (13) is by some central gears (12), gear ring (7), the double reduction mechanism that output shaft assembly (14) consists of, described toothed belt wheel assembly (10) drives the gear for two stage planetary gear train reducing gear (13) in the compound gear ring (7) that is fixed on the lower shell body (1) by profile of tooth transmission shaft (9), described gear for two stage planetary gear train reducing gear (13) is output as the rotation of planet carrier, and described planet carrier is as output shaft assembly (14).
8. the brake caliper assembly of a kind of vehicle electronic parking braking system according to claim 6, it is characterized in that, described parking braking clamp comprise braking clamp body (22), antifriction sheet (15), piston packing (18), Parking swivel nut (17), Parking screw rod (16), piston (19) and friction plate (21), between described planetary gear train speed reducing mechanism (13) and the parking braking clamp by rotatablely moving by spline joint input between Parking screw rod (16) and the output shaft assembly (14), and Parking screw rod (16), Parking swivel nut (17) then will rotatablely move and be converted into straight line motion, the conical surface of described Parking swivel nut (17) cooperates with piston (19), pushing piston (19) advances, described piston (19) is outside to be contacted with friction plate (21), friction plate (21) is contained on the support, along piston (19) thus centerline direction is free to slide and clamps brake disc (20) and brake.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499079.8A CN102966686B (en) | 2012-11-29 | 2012-11-29 | A kind of brake caliper assembly of vehicle electronic parking braking system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210499079.8A CN102966686B (en) | 2012-11-29 | 2012-11-29 | A kind of brake caliper assembly of vehicle electronic parking braking system |
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| CN102966686A true CN102966686A (en) | 2013-03-13 |
| CN102966686B CN102966686B (en) | 2015-10-07 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806669A (en) * | 2015-04-23 | 2015-07-29 | 吉林大学 | Vehicle electronic mechanical brake actuator |
| CN106884913A (en) * | 2017-03-09 | 2017-06-23 | 宁波吉利汽车研究开发有限公司 | A kind of electronic control type electrodynamic braking calipers assembly |
| FR3069297A1 (en) * | 2018-07-19 | 2019-01-25 | Foundation Brakes France | ELECTROMECHANICAL BRAKE CALIPER PISTON DRIVER |
| CN109424673A (en) * | 2017-08-30 | 2019-03-05 | 上海汇众汽车制造有限公司 | Executing agency for electric parking brake |
| CN109849872A (en) * | 2019-04-08 | 2019-06-07 | 合肥工业大学 | A kind of motor drive machinery brake apparatus |
| CN109991439A (en) * | 2019-04-24 | 2019-07-09 | 苏州科美澄汽车科技有限公司 | A kind of device of electric card pincers motor speed measurement and corresponding control method |
| CN110219910A (en) * | 2019-05-08 | 2019-09-10 | 浙江吉利控股集团有限公司 | Brake caliper |
| CN112443599A (en) * | 2019-08-30 | 2021-03-05 | 比亚迪股份有限公司 | Brake-by-wire system and vehicle |
| US11143252B2 (en) | 2016-12-07 | 2021-10-12 | Foundation Brakes France | Driver for electromechanical brake caliper piston, comprising a non-friction face |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104806669A (en) * | 2015-04-23 | 2015-07-29 | 吉林大学 | Vehicle electronic mechanical brake actuator |
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| US11143252B2 (en) | 2016-12-07 | 2021-10-12 | Foundation Brakes France | Driver for electromechanical brake caliper piston, comprising a non-friction face |
| CN106884913A (en) * | 2017-03-09 | 2017-06-23 | 宁波吉利汽车研究开发有限公司 | A kind of electronic control type electrodynamic braking calipers assembly |
| CN109424673A (en) * | 2017-08-30 | 2019-03-05 | 上海汇众汽车制造有限公司 | Executing agency for electric parking brake |
| FR3069297A1 (en) * | 2018-07-19 | 2019-01-25 | Foundation Brakes France | ELECTROMECHANICAL BRAKE CALIPER PISTON DRIVER |
| CN109849872A (en) * | 2019-04-08 | 2019-06-07 | 合肥工业大学 | A kind of motor drive machinery brake apparatus |
| CN109991439A (en) * | 2019-04-24 | 2019-07-09 | 苏州科美澄汽车科技有限公司 | A kind of device of electric card pincers motor speed measurement and corresponding control method |
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| CN110219910B (en) * | 2019-05-08 | 2021-04-16 | 浙江吉利控股集团有限公司 | Brake caliper |
| CN112443599A (en) * | 2019-08-30 | 2021-03-05 | 比亚迪股份有限公司 | Brake-by-wire system and vehicle |
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| CN102966686B (en) | 2015-10-07 |
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| CP01 | Change in the name or title of a patent holder |
Address after: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 19 Taishan Road Patentee after: WUHU BOTELI AUTOMOBILE SAFETY SYSTEM CO., LTD. Address before: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 19 Taishan Road Patentee before: Wuhu Bethel Automotive Secure Systems Ltd. |