CN219706956U - Electric control building module of braking system - Google Patents
Electric control building module of braking system Download PDFInfo
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- CN219706956U CN219706956U CN202320804029.XU CN202320804029U CN219706956U CN 219706956 U CN219706956 U CN 219706956U CN 202320804029 U CN202320804029 U CN 202320804029U CN 219706956 U CN219706956 U CN 219706956U
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Abstract
The utility model discloses an electric control pressure building module of a braking system, which comprises a motor rotor, a motor shell, a coupler and a ball screw assembly, wherein a first bearing is arranged on the motor shell, the ball screw assembly comprises a screw shaft and a nut, the coupler is arranged and is connected with the screw shaft and the motor rotor, the coupler is provided with a cavity, a part of the cavity is positioned in an inner ring of the first bearing, and a part of the nut is positioned in the cavity of the coupler. The electric control pressure building module of the braking system forms a self-aligning structure through the arrangement of the conical surface, and ensures the requirements of reliability and coaxiality of the structure.
Description
Technical Field
The utility model belongs to the technical field of braking systems, and particularly relates to an electric control pressure building module of a braking system.
Background
In recent years, with the development of electronic technology, electromechanical integration technology and products have been applied on a large scale on vehicles, in which an electrically-driven booster has gradually replaced a conventional mechanical vacuum booster. The building-up module of the electric control driving booster at least comprises a brushless motor and a linear driving mechanism, the motor provides torque, the linear driving mechanism converts the rotary motion of the motor into the linear motion of a plunger, the plunger pushes brake fluid in a booster cylinder to generate hydraulic pressure, and a brake caliper at the driving wheel end further generates braking force.
In the prior art, the common forms of the electric control pressure building modules are mainly divided into two types: scheme one: at least comprises a motor, a worm gear and a gear rack; scheme II: at least comprises a motor and a ball screw;
the second scheme adopts a hollow motor to directly drive the ball screw, so that the structure is more exquisite, and the whole vehicle arrangement is easy; meanwhile, the whole transmission efficiency is high, and the pressure building capacity is high, so that the scheme is more advantageous than the scheme I in terms of scheme selection and whole vehicle arrangement. However, in the present patent adopting the second scheme, there is still a problem that the coaxiality deviation between the plunger and the pressure building cylinder is large due to the complex structure or large axial dimension and the large number of parts.
Patent document publication No. CN102483142a discloses a linear unit in which a motor rotor is connected to a screw shaft, a canning member is provided between the motor rotor and the screw shaft, the screw shaft is limited to be rotatable only by the structure of the canning member, a nut is limited to be axially movable only, and bearings are provided in both radial and axial directions of the screw shaft. The problem that this scheme exists is that the distance between from the nut terminal surface to the motor housing afterbody is long, and the space of this partial structure is not fully utilized, and in equal space, the space that can be used to arrange the screw shaft screw thread is limited, leads to the stroke of ball screw assembly short to lead to the system to arrange the liquid volume low. If the screw length is required to be increased in order to improve the drainage amount, the axial length of the pressure building module is increased, and the scheme is used for arranging the motor terminal and the sensor at the tail part of the motor, so that the axial length is also increased.
Patent document publication No. CN108137025a discloses an electromechanical actuator, in which a motor rotor is connected to a screw shaft, and only a single bearing is provided on an outer ring of the motor rotor. The problems in the practical application of the patent scheme are as follows: first, motor rotor needs to assemble rotor core, bearing, lock nut, lead screw axle and prevent changeing structure simultaneously, and motor rotor's intensity needs to accomplish very high, and the while structure is complicated, and is with high costs. Secondly, in order to meet the installation and fixation of a single bearing, a hole is formed in the tail part of the motor shell, and the outer ring of the bearing is fixed by utilizing the special-shaped motor shell; the inner ring of the bearing is fixed by the lock nut and the screw shaft boss, and meanwhile, an end cover and a sealing ring are required to be installed, so that the structure is complex, and the number of parts is large. Thirdly, there is also a problem that the thread length is limited in the first patent, in order to overcome the defects of short pressure stroke and low liquid discharge amount, the scheme is to install a small piston at the end of the plunger, and design the pressure building module into a bidirectional pressure building structure through the design of a valve and other structural members, so that the liquid discharge amount is increased, but the structure of the pressure reducing module becomes complicated, the cost is increased, and the problem is not fundamentally solved.
The patent document with publication number CN109774693a discloses an active pressure building mechanism, the patent document with publication number CN211239582U discloses a high-speed brushless dc motor for an automobile brake system, and the problems also exist.
Therefore, it is a difficult problem how to simplify the structural arrangement of the pressure building module, to increase the drainage amount or to reduce the overall axial length.
Secondly, the motor and the pressure building valve body are generally fixed by screws, the power of the motor rotor is required to be transmitted to the plunger, and then the brake fluid is pushed in the pressure building cylinder to generate hydraulic pressure, the matching requirement of the plunger and the pressure building cylinder is high, the motor rotor and the plunger are connected through a plurality of parts, and the motor rotor and the plunger can be caused to be different in axis due to factors such as the matching error of a screw pair or the machining error of a matching end face, the phenomenon of the different axis is reflected in that the axes of the two parts are parallel to each other but are different, or the axes of the two parts intersect and form a certain angle, the phenomenon of the different axis can lead to friction between the plunger and the inner wall of the pressure building cylinder, and even the phenomenon of cylinder pulling occurs.
Therefore, it is a difficult problem how to simplify the structural arrangement of the pressure building module, to increase the drainage amount or to reduce the overall axial length, and to increase the coaxiality of the motor and the transmission member.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides an electric control pressure building module of a braking system, which aims to simplify the structural arrangement of the pressure building module, shorten the axial length and improve the coaxiality.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the electric control pressure building module of the braking system comprises a motor rotor, a motor shell, a coupler and a ball screw assembly, wherein a first bearing is arranged on the motor shell, the ball screw assembly comprises a screw shaft and a nut, the coupler is connected with the screw shaft and the motor rotor, the coupler is provided with a cavity, a part of the cavity is located in an inner ring of the first bearing, and a part of the nut is located in the cavity of the coupler.
The electric control pressure building module of the braking system further comprises a plunger, the nut is connected with the plunger, a first inner conical surface is arranged on the plunger, and a first outer conical surface which is in contact with the first inner conical surface is arranged on the nut.
The plunger is in threaded connection with the nut.
The end part of the screw shaft is matched with the shaft coupling through a taper hole, a second outer conical surface is arranged on the screw shaft, and a second inner conical surface which is contacted with the second outer conical surface is arranged on the shaft coupling.
The end part of the screw shaft and the shaft coupling are fixed in axial position through riveting, and the riveting mode is rolling riveting or turning riveting.
The end part of the screw shaft is in interference fit with the coupler, and the end part of the screw shaft is an optical axis, provided with knurling or provided with a spline.
The end part of the screw shaft and the coupler are fixed in axial position through the press-fit rivet ring, and the end part of the screw shaft is provided with a conical section matched with the inner ring of the rivet ring.
The inner ring of the first bearing is integrated with the coupling.
The motor housing comprises a first housing and a second housing, wherein a first bearing is arranged on the first housing, the first bearing is sleeved on the coupler, a second bearing is arranged on the second housing, and the first housing is connected with the second housing and forms a cavity for accommodating the motor body.
The nut and the coupler are provided with rotation stopping bosses which are matched with each other to limit the circumference.
The rotation stopping boss on the coupler is formed by pressing a metal pin, or the rotation stopping boss and the coupler are integrated into a whole.
The nut is provided with a guide structure, the guide structure is positioned outside the cavity of the coupler, and the guide structure is matched with the rotation stopping sleeve.
The guide structure is provided with bosses or grooves which are uniformly distributed along the circumferential direction, and the number of the bosses or grooves is 3-5; the guide structure is formed by cold extrusion or machining, the outer diameter of the guide structure is larger than the outer diameter of a part of the nut positioned in the cavity of the coupler, and the inner diameter of the guide structure is larger than the outer diameter of the plunger.
The ball screw assembly is an internal circulation ball screw.
The electric control pressure building module of the braking system forms a self-aligning structure through the arrangement of the conical surface, so that the requirements on the reliability and coaxiality of the structure are ensured; through structural design, the distance from the stroke starting point of the ball screw assembly to the end face of the motor shell is shortened to the greatest extent, so that the effective stroke of the ball screw is maximized, and the axial size is reduced.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
fig. 1 is a schematic structural diagram of an electrically controlled pressure building module of a brake system according to a first embodiment;
FIG. 2 is a schematic view of a ball screw assembly according to the first embodiment;
FIG. 3 is a schematic view of a ball screw assembly and a coupling according to the first embodiment;
FIG. 4 is a schematic view of the structure of the screw shaft and the coupling in the first embodiment;
FIG. 5 is a schematic view of a ball screw assembly and a coupling according to a second embodiment;
FIG. 6 is a schematic view of the structure of a screw shaft and a coupling in the third embodiment;
marked in the figure as:
1. an electric control pressure building module; 2. a motor body; 3. a motor stator; 4. a motor rotor; 5. a first bearing; 6. a ball screw assembly; 6a, a screw shaft; 6b, nuts; 7. a coupling; 8. a first housing; 9. a second housing; 10. a second bearing; 11. a plunger; 12. a rotation stop pin; 13. riveting rings; 14. and a rotation stopping sleeve.
Detailed Description
The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the utility model, and to aid in its practice, by those skilled in the art.
The utility model mainly provides an electric control pressure building module of a braking system, which mainly comprises the following structure: including motor body, motor housing and ball screw assembly, first casing and second casing are connected and form the semi-closed cavity that holds motor body, are provided with single shaft coupling, connect motor rotor and screw shaft through the shaft coupling, with motor rotor's power transmission screw shaft, install first bearing in the first casing, first bearing sets up in the shaft coupling outside, or the shaft coupling is integrated with first bearing, the shaft coupling has the cavity, the at least part of this cavity is located the inner circle of first bearing, the at least part of nut is located the cavity of shaft coupling.
The electric control building module has the following characteristics:
1. space in the motor is utilized to the maximum, and the axial length is reduced or the liquid discharge amount is increased:
generally, the axial length of the pressure building module directly affects the difficulty of arrangement on the whole vehicle, so that the shorter the pressure building module is required to be, the better the pressure building module is.
In the prior art, the ball screw assembly is generally disposed inside the motor body, and the solution disclosed in the patent document with publication number CN102483142a has the problems that: the ball screw assembly is complex with the connection structure of motor body, and the distance from the nut terminal surface to motor housing terminal surface is very long, and this partial structure has occupied the great partial axial space of motor body, leads to screw shaft's screw length weak point, and then leads to ball screw assembly's stroke weak point, and the system drainage volume is low, if increase screw shaft's screw length, can lead to building the axial length increase of pressing the module again.
In the utility model, a screw shaft is connected with a motor rotor through a coupler, a first bearing is arranged at the outer side of the coupler, the first bearing is arranged in a first shell, the coupler is provided with a cavity, and the cavity is at least partially positioned in an inner hole of the first bearing; when the nut is moved to an extreme position at one end, at least a portion of the nut is positioned within the cavity of the coupling.
Through simplifying the connection structure of ball screw assembly and motor rotor, with first bearing, shaft coupling and nut overlap arrangement in axial space, the distance between the terminal surface of the maximized shortened nut to the motor casing terminal surface can accomplish the maximize with the stroke of ball screw assembly under the certain condition of motor length to improve the drainage volume. The length of the screw shaft can be shortened to the shortest under the condition of a certain liquid discharge amount, thereby shortening the whole axial length.
2. The component is integrated, the structure is simple and compact, the types of parts can be reduced, and the assembly process is simplified:
in order to solve the contradiction between the pressure build-up stroke and the axial dimension, as disclosed in the patent document with publication number CN108137025a, the pressure build-up module is designed to be of a bi-directional pressure build-up structure by adding a valve and a structural member, so that a sufficient amount of liquid discharge can be generated in a limited ball screw stroke, but the solution causes the overall structure of the pressure build-up module to be complicated, increases the assembly process, and further causes the increase of cost.
According to the scheme of the utility model, the stroke of the ball screw assembly can be greatly increased without increasing the axial length of the motor, the system drainage volume can meet the use requirements of most passenger cars, and the structure of the pressure building module and the assembly process thereof can be further simplified through the design of component integration and the like:
(1) The motor rotor and the screw shaft are connected through the single coupler, the first bearing is arranged on the outer side of the coupler, or the coupler and the bearing are integrated into a whole, namely, the motor rotor and the screw shaft are directly connected through the bearing with the special inner ring, so that one-step assembly procedure and assembly errors can be reduced.
(2) When the nut is retracted to the limit position, at least one part of the nut is positioned in the cavity of the coupler, and the part positioned outside the cavity of the coupler is provided with a guide structure, so that the axial length is reduced, and the space is fully utilized. The guide structure cooperates with a rotation stopping sleeve on the outer side of the nut, limits the nut to only axially move but not rotate, and is preferably integrated with the nut.
(3) The plunger is of a simple canning structure, and the plunger is not required to be additionally provided with a piston and other structures.
(4) The motor shell consists of two parts, and the motor body, the ball screw assembly, the bearing and other parts can be completely assembled from the opening end of the motor shell, so that the tail of the motor does not need to be perforated, and an additional end cover and a sealing structure are omitted.
3. Adopt hard connection + self-aligning structure, guarantee reliability and the coaxial requirement of structure:
in the utility model, the coupler is made of hard materials, the coupler is connected with the motor rotor by welding, the inner hole of the coupler is fixed with the screw shaft by hard connection modes such as interference press fitting or riveting, the nut is connected with the plunger by threads, and the connection mode of the whole power transmission route is simple and reliable without complex assembly process.
The screw shaft end and the inner hole of the coupler are preferably provided with mutually matched conical surfaces, the nut end and the inner hole of the plunger are preferably provided with mutually matched conical surfaces, and the coaxial requirements of all parts after installation can be ensured by utilizing the self-aligning function of the conical surface matching.
In summary, according to the utility model, the ball screw assembly and the motor body are overlapped in the axial direction, so that the distance from the stroke starting point of the ball screw assembly to the end face of the motor housing can be shortest, and the connecting structure of the ball screw assembly and the motor rotor, the sensor and other components are arranged at the periphery of the ball screw thread raceway, so that no additional axial space is occupied; secondly, on the premise of ensuring enough liquid discharge amount or axial length, integrating parts and reducing the types of the parts; the hard connection and conical surface centering structure is adopted, so that the reliability and the coaxial requirement of the connection structure are ensured. Therefore, the electric control building block module has simple and compact structure and small number of parts, and can reduce the axial length or improve the liquid discharge amount.
The following description is made in connection with specific embodiments.
Embodiment one:
as shown in fig. 1 to 3, the electric control building module of the brake system of the present embodiment includes at least a motor body 2, a motor housing, a ball screw assembly 6, a coupling 7, a bearing, and a plunger 11. Wherein, motor body 2 comprises motor stator 3 and motor rotor 4 at least, and motor rotor 4 comprises support piece and the iron core part of installing on support piece at least, and support piece is hollow cylindric structure, and this motor is brushless motor, and specific structure is current mature technique, and the description is omitted here.
The motor housing comprises a first housing 8 and a second housing 9, and is formed by stretching and is made of metal plates. The first casing 8 and the second casing 9 are fixed by welding to form a semi-closed cavity for accommodating parts such as the motor body 2, the ball screw assembly 6 and the like.
The coupler 7 is a single coupler 7, the coupler 7 is made of carbon steel, and the end part of the coupler 7 is fixed with the motor rotor 4 through welding. The coupling 7 has a hollow structure, the coupling 7 is connected to the screw shaft 6a, the screw shaft 6a is inserted into an inner hole of the coupling 7, and the coupling 7 transmits the force of the motor rotor 4 to the screw shaft 6a. The coupling 7 also has a cavity communicating with the bore, a portion of the nut 6b being located within the cavity of the coupling 7.
The bearing comprises a first bearing 5 and a second bearing 10, wherein the first bearing 5 is arranged at the inner end part of the first shell 8, the inner ring of the first bearing 5 is sleeved on the outer ring of the coupler 7, and the first bearing 5 is a four-point contact ball bearing; the second bearing 10 is mounted in the second housing 9, the inner ring of the second bearing 10 is press-fitted on the outer ring of the support of the motor rotor 4, and the second bearing 10 is a standard ball bearing. The first casing 8 passes through welded fastening with the second casing 9, and shaft coupling 7 passes through welded fastening with motor rotor 4, and both ends all set up the bearing, utilize two fulcrums to form powerful supporting role to motor rotor 4, can guarantee motor rotor 4 and last stable operation, improve the stability of building the pressure module.
The ball screw assembly 6 includes at least a screw shaft 6a and a nut 6b, and the ball screw assembly 6 is an internal circulation ball screw. The screw shaft 6a is composed of a threaded portion and a connecting portion, in this embodiment, the connecting portion of the screw shaft 6a is in a shape of a truncated cone, an end portion of the screw shaft 6a is in taper hole fit with the coupling 7, a second outer conical surface is arranged on the screw shaft 6a, and a second inner conical surface which is in contact with the second outer conical surface is arranged on the coupling 7. The second inner conical surface is located in the inner hole of the coupler 7, the second outer conical surface is an outer surface located at one end of the screw shaft 6a, the second inner conical surface and the second outer conical surface are conical surfaces, the second inner conical surface and the second outer conical surface are coaxial with the screw shaft 6a and the coupler 7, therefore, the connecting part of the inner hole of the coupler 7 and the screw shaft 6a is provided with conical surfaces matched with each other, and the screw shaft 6a and the coupler 7 can ensure the coaxial requirement of connection through the conical surfaces. The end part of the screw shaft 6a is provided with a thin-wall structure and is used for riveting outwards in a side turning mode, and the screw shaft 6a and the coupler 7 are fixed.
The plunger 11 is of a pot-shaped structure, the nut 6b is connected with the plunger 11 through threads, a first inner conical surface is arranged on the plunger 11, a first outer conical surface which is contacted with the first inner conical surface is arranged on the nut 6b, the first inner conical surface and the first outer conical surface are conical surfaces, and the first inner conical surface and the first outer conical surface are coaxial with the nut 6b and the plunger 11. Thus, on the threaded side of the plunger 11 and the nut 6b for connection, there are mutually matching conical surfaces, by means of which the plunger 11 and the nut 6b ensure the coaxial requirements of the connection. The shaft coupling 7 is matched with the conical surfaces of the screw shaft 6a, the nut 6b and the plunger 11, so that the coaxial requirements of all the components in the power transmission route can be ensured.
Part of the nut 6b is located in the cavity of the coupler 7, part of the cavity of the coupler 7 is located in the inner ring of the first bearing 5, the nut 6b, the coupler 7 and the first bearing 5 are arranged in a staggered mode in the axial space, the distance from the end face of the nut 6b to the end face of the first shell 8 can be shortened, and therefore the stroke of the ball screw assembly 6 is maximized.
The coupling 7 and the nut 6b are provided with a pair of rotation stopping bosses which are matched oppositely, the rotation stopping bosses are used for preventing the nut 6b from being blocked with the end face of the coupling 7 when the nut 6b is retracted to the bottom, and when one side edge of the rotation stopping boss arranged on the coupling 7 is attached to one side edge of the rotation stopping boss arranged on the nut 6b, the attaching position is the limit position of the nut 6b relative to the screw shaft 6a or the coupling 7. In this embodiment, the rotation stopping boss on the coupling 7 is formed by press-fitting a metal pin, and the rotation stopping boss on the nut 6b is integrally formed with the nut 6 b.
Part of the nut 6b is positioned outside the cavity of the coupler 7, a guide structure is arranged on the nut 6b and positioned outside the cavity of the coupler 7, the guide structure is matched with the rotation stopping sleeve 14, and the plunger 11 is inserted into the central hole of the rotation stopping sleeve 14. The guide structures are grooves uniformly distributed along the circumferential direction, the number of the guide structures is 3, the guide structures and the nuts 6b are formed together in the forming process, the outer diameter of the guide structures is larger than the outer diameter of the part, located in the cavity of the coupler 7, of the nuts 6b, and the inner diameter of the guide structures is larger than the outer diameter of the plunger 11. The guide structure is matched with a rotation stopping sleeve 14 arranged on the outer side of the plunger 11, a boss matched with the guide structure is arranged on the rotation stopping sleeve 14, and the nut 6b is limited to be capable of moving axially but not rotating through the matching of the rotation stopping sleeve 14 and the guide structure.
Embodiment two:
as shown in fig. 5, the present embodiment is different from the first embodiment in that: the coupling 7 is integrated with the inner ring of the first bearing 5, namely, the motor rotor 4 and the screw shaft 6a are directly connected through a bearing with a special inner ring, and the assembly procedure and assembly errors of one step can be reduced through the integration of parts.
As shown in fig. 5, the end of the screw shaft 6a is formed with a burring structure located outside the coupling 7, the burring structure being in contact with the end face of the coupling 7, the burring structure being for fixing the axial positions of the screw shaft 6a and the coupling 7.
Embodiment III:
as shown in fig. 6, the present embodiment is different from the first embodiment in that: the screw shaft 6a and the inner hole of the coupler 7 are in straight hole interference fit, the end part of the screw shaft 6a can be an optical axis, or knurling is arranged on the end part of the screw shaft 6a, or a spline is arranged on the end part of the screw shaft 6a. In addition, the end of the screw shaft 6a is provided with a small conical section which is matched with a riveting ring 13, the riveting ring 13 is fixedly arranged on the conical section, the riveting ring 13 is contacted with the end face of the coupler 7, and the riveting ring 13 is used for fixing the axial positions of the screw shaft 6a and the coupler 7.
The utility model is described above by way of example with reference to the accompanying drawings. It will be clear that the utility model is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present utility model; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.
Claims (14)
1. The utility model provides an automatically controlled pressure module of building up of braking system, includes motor rotor, motor housing, shaft coupling and ball screw assembly, installs first bearing on the motor housing, and ball screw assembly includes lead screw axle and nut, its characterized in that: a coupling is arranged and is connected with the screw shaft and the motor rotor, the coupling is provided with a cavity, a part of the cavity is positioned in the inner ring of the first bearing, and a part of the nut is positioned in the cavity of the coupling.
2. The electrically controlled pressure building module of a brake system according to claim 1, wherein: the nut is connected with the plunger, a first inner conical surface is arranged on the plunger, and a first outer conical surface which is in contact with the first inner conical surface is arranged on the nut.
3. The electrically controlled pressure building module of a brake system according to claim 2, wherein: the plunger is in threaded connection with the nut.
4. An electrically controlled pressure building module for a brake system according to any one of claims 1 to 3, wherein: the end part of the screw shaft is matched with the shaft coupling through a taper hole, a second outer conical surface is arranged on the screw shaft, and a second inner conical surface which is contacted with the second outer conical surface is arranged on the shaft coupling.
5. The electrically controlled pressure building module of a brake system according to claim 4, wherein: the end part of the screw shaft and the shaft coupling are fixed in axial position through riveting, and the riveting mode is rolling riveting or turning riveting.
6. An electrically controlled pressure building module for a brake system according to any one of claims 1 to 3, wherein: the end part of the screw shaft is in interference fit with the coupler, and the end part of the screw shaft is an optical axis, provided with knurling or provided with a spline.
7. An electrically controlled pressure building module for a brake system according to any one of claims 1 to 3, wherein: the end part of the screw shaft and the coupler are fixed in axial position through the press-fit rivet ring, and the end part of the screw shaft is provided with a conical section matched with the inner ring of the rivet ring.
8. An electrically controlled pressure building module for a brake system according to any one of claims 1 to 3, wherein: the inner ring of the first bearing is integrated with the coupling.
9. An electrically controlled pressure building module for a brake system according to any one of claims 1 to 3, wherein: the motor housing comprises a first housing and a second housing, wherein a first bearing is arranged on the first housing, the first bearing is sleeved on the coupler, a second bearing is arranged on the second housing, and the first housing is connected with the second housing and forms a cavity for accommodating the motor body.
10. An electrically controlled pressure building module for a brake system according to any one of claims 1 to 3, wherein: the nut and the coupler are provided with rotation stopping bosses which are matched with each other to limit the circumference.
11. The electrically controlled pressure building module of a brake system according to claim 10, wherein: the rotation stopping boss on the coupler is formed by pressing a metal pin, or the rotation stopping boss and the coupler are integrated into a whole.
12. An electrically controlled pressure building module for a brake system according to claim 2 or 3, wherein: the nut is provided with a guide structure, the guide structure is positioned outside the cavity of the coupler, and the guide structure is matched with the rotation stopping sleeve.
13. The electrically controlled pressure building module of a brake system according to claim 12, wherein: the guide structure is provided with bosses or grooves which are uniformly distributed along the circumferential direction, and the number of the bosses or grooves is 3-5; the guide structure is formed by cold extrusion or machining, the outer diameter of the guide structure is larger than the outer diameter of a part of the nut positioned in the cavity of the coupler, and the inner diameter of the guide structure is larger than the outer diameter of the plunger.
14. An electrically controlled pressure building module for a brake system according to any one of claims 1 to 3, wherein: the ball screw assembly is an internal circulation ball screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320804029.XU CN219706956U (en) | 2023-04-12 | 2023-04-12 | Electric control building module of braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320804029.XU CN219706956U (en) | 2023-04-12 | 2023-04-12 | Electric control building module of braking system |
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| Publication Number | Publication Date |
|---|---|
| CN219706956U true CN219706956U (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320804029.XU Active CN219706956U (en) | 2023-04-12 | 2023-04-12 | Electric control building module of braking system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117261859A (en) * | 2023-11-21 | 2023-12-22 | 上海威肯西科技有限公司 | Transmission booster device and manufacturing method thereof |
-
2023
- 2023-04-12 CN CN202320804029.XU patent/CN219706956U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117261859A (en) * | 2023-11-21 | 2023-12-22 | 上海威肯西科技有限公司 | Transmission booster device and manufacturing method thereof |
| CN117261859B (en) * | 2023-11-21 | 2024-03-01 | 上海威肯西科技有限公司 | Transmission booster device and manufacturing method thereof |
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