CN216915818U

CN216915818U - Pedal feel simulator assembly and decoupled brake booster

Info

Publication number: CN216915818U
Application number: CN202123019857.2U
Authority: CN
Inventors: 张晓坤; 于飞; 王龙超; 田聪
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-07-08
Anticipated expiration: 2031-12-03

Abstract

The utility model provides a pedal feel simulator assembly and a decoupled brake booster. The pedal feel simulator assembly includes: a force feedback mechanism for applying force feedback to the input rod when the input rod is applying a force toward the spindle with coupling and decoupling, the force feedback mechanism comprising a first force feedback member, and a second force feedback member; the first accommodating part accommodates the first force feedback part and is sleeved on the main shaft; and the second accommodating part is used for accommodating the second force feedback part and sleeved on the input rod, the second accommodating part comprises a rod side retainer, a plunger and a connecting part for connecting the rod side retainer and the plunger, the rod side retainer is coaxially sleeved outside the plunger, an accommodating space for accommodating the second force feedback part is formed between the rod side retainer and the plunger, the plunger is sleeved outside the input rod, the plunger comprises a closed end and a non-closed end, and the closed end closes the end part of the input rod, which faces the main shaft.

Description

Pedal feel simulator assembly and decoupled brake booster

Technical Field

The utility model relates to the field of vehicle brake boosting, in particular to a pedal feel simulator assembly and a decoupling type brake booster with the pedal feel simulator assembly.

Background

In order to enable the driver of the motor vehicle to comfortably actuate an actuating element of the brake system, such as, for example, a brake pedal, the brake system generally has a brake booster (brake booster). Brake systems having a brake booster are often referred to as brake systems with brake assistance. The brake booster is designed to provide an auxiliary force which, in addition to the driver braking force applied by the driver to the operating element, serves to brake at least one wheel, the properties of which directly influence the driving safety of the vehicle. The existing vehicle brake booster comprises a vacuum booster and an electronic booster, the vacuum booster is widely applied to fuel vehicles, and the electronic booster is widely applied to new energy vehicles.

CN208325190U relates to a hydraulic brake boosting system and a vehicle. The hydraulic brake power-assisted system comprises a brake pedal opening sensor, a controller, an electromagnetic proportional valve and an energy accumulator, wherein the controller is connected with the brake pedal opening sensor in a sampling mode, an oil outlet of the energy accumulator is provided with a pipeline used for being connected with a brake master cylinder of a vehicle, the pipeline is provided with the electromagnetic proportional valve, and the controller is connected with the electromagnetic proportional valve in a control mode. The brake boosting of the document adopts hydraulic pressure, so that the problem of slow response of a hydraulic brake system without a brake boosting system can be solved, or the defect of poor vacuum brake boosting effect can be avoided; the brake effect of the whole vehicle can be effectively improved, the brake comfort of a driver is effectively improved, and the labor intensity of the driver for stepping on a brake pedal is reduced.

SUMMERY OF THE UTILITY MODEL

According to various aspects, the utility model aims to provide a technical scheme for a decoupling type brake booster, which is convenient for production line manufacture and simplifies assembly.

Furthermore, the present invention is also directed to solve or alleviate other technical problems of the prior art.

The present invention solves the above problems by providing a pedal feel simulator assembly and decoupled brake booster, in particular, according to an aspect of the utility model, there is provided:

a pedal feel simulator assembly for a decoupled brake booster having a pedal feel simulator for engagement with a brake pedal of a vehicle and a spindle with which an input rod of the pedal feel simulator can be coupled and decoupled, the pedal feel simulator assembly comprising:

a force feedback mechanism for applying force feedback to the input rod when the input rod is applying a force towards the spindle, both coupled and decoupled, the force feedback mechanism comprising a first force feedback member, and a second force feedback member;

the first accommodating part accommodates the first force feedback part and is sleeved on the main shaft; and

the second accommodating part accommodates the second force feedback part and is sleeved on the input rod, the second accommodating part comprises a rod side retainer, a plunger and a connecting part for connecting the rod side retainer and the plunger, the rod side retainer is coaxially sleeved outside the plunger, an accommodating space for accommodating the second force feedback part is formed between the rod side retainer and the plunger, the plunger is sleeved outside the input rod, the plunger comprises a closed end and a non-closed end, and the closed end closes the end part, facing the main shaft, of the input rod.

According to another aspect of the present invention, there is provided a decoupled brake booster, wherein it comprises any of the pedal feel simulator assemblies described above.

Drawings

The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,

FIG. 1 is a cross-sectional view of a decoupled brake booster according to the present invention;

FIG. 2 is a cross-sectional view of a pedal feel simulator assembly according to one embodiment of the present invention;

FIG. 3 illustrates a perspective view and a cross-sectional view of a plunger of the pedal feel simulator assembly of the embodiment of FIG. 2 according to the present invention;

FIG. 4 shows a schematic cross-sectional and perspective view of a rod-side retainer of the pedal feel simulator assembly and a schematic perspective view of a stop in accordance with the embodiment of the present invention shown in FIG. 2;

FIG. 5 is an assembled cross-sectional schematic view of the rod-side retainer, plunger and stop of the pedal feel simulator assembly according to the embodiment of the present invention shown in FIG. 2;

FIG. 6 is a cross-sectional view of a pedal feel simulator assembly according to another embodiment of the present invention; and

fig. 7 illustrates a perspective view and a cross-sectional view of a second receiving member of the pedal feel simulator assembly according to the embodiment of the present invention illustrated in fig. 6.

Detailed Description

It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and descriptive purposes only and not for purposes of indication or implication as to the relative importance of the respective components.

Referring to FIG. 1, a cross-sectional view of a decoupled brake booster 1000 according to the present invention is shown.

The decoupling type means that the input rod 11 of the pedal feel simulator can be coupled with and decoupled from the main shaft 2, namely, the input rod can be in contact with or not in contact with the main shaft. Under the condition of non-contact, the whole brake booster 1000 performs braking in one mode (for example, braking can be achieved by means of drag torque of a main motor of the whole vehicle alone, braking can also be achieved by cooperation of a hydraulic main brake cylinder and braking assistance, and braking can be achieved by cooperation of the hydraulic main brake cylinder and the drag torque of the main motor of the whole vehicle). The pedal feeling simulator is used for simulating the feeling of stepping on the brake pedal during braking. Since the focus herein is on the design of the pedal feel simulator assembly, much is done with respect to other components of the decoupled brake booster, including its principles of operation.

The pedal feel simulator assembly 100 is used for a decoupled brake booster 1000, the decoupled brake booster 1000 having a pedal feel simulator for engaging with a brake pedal of a vehicle and a spindle 2, an input rod 11 of the pedal feel simulator being able to be coupled and decoupled with the spindle 2.

Referring to fig. 2-5, a pedal feel simulator assembly 100 of an embodiment of the present invention comprises:

a force feedback mechanism for applying force feedback to the input rod 11 when the input rod 11 is applying a force towards the spindle 2 in coupled and decoupled conditions, the force feedback mechanism comprising a first force feedback member 3 and a second force feedback member 7;

the first accommodating part 4 accommodates the first force feedback part 3 and is sleeved on the main shaft 2; and

the second accommodating part 5 accommodates the second force feedback part 7 and is sleeved on the input rod 11, the second accommodating part 5 comprises a rod side retainer 52, a plunger 51 and a connecting part 53 for connecting the rod side retainer 52 and the plunger 51, the rod side retainer 52 is coaxially sleeved outside the plunger 51, an accommodating space for accommodating the second force feedback part 7 is formed between the rod side retainer 52 and the plunger 51, the plunger 51 is sleeved outside the input rod 11, the plunger 51 comprises a closed end 517 and a non-closed end 518, and the closed end 517 closes the end part of the input rod 11 facing the spindle 2.

The connecting portion 53 includes a seat 522, a projection 511, and a stopper 8. The rod-side holder 52 includes a cylindrical body 521, a seat 522 is formed to protrude inward along the inner wall of the cylindrical body 521, and a protrusion 511 is formed to protrude outward along the outer wall of the non-closed end 518 of the plunger 51. The plunger 51 is inserted into the rod-side holder 52 with the side of the protruding portion 511 toward the closed end 517 abutting against the abutment 522 of the rod-side holder 52 and the stopper 8 abutting against the side of the protruding portion 511 toward the non-closed end 518, sandwiching the protruding portion 511 of the plunger 51 between the abutment 522 and the stopper 8 of the rod-side holder 52, thereby fixedly connecting the rod-side holder 52 and the plunger 51 together.

The inner periphery, e.g., the inner cylindrical surface, of the rod-side retainer 52 is configured with an inner groove 524, and the inner groove 524 is located on the side of the projection 511 toward the brake pedal in the assembled state of the pedal feel simulator assembly 100.

A stop portion 516 protrudes inwardly from the inner wall of the plunger 51, and the stop portion 516 is located near the closed end 517 to limit the axial movement of the end of the input rod 11 relative to the plunger 51.

The stop member 8 includes a fixed end 81 and an abutting end 82, wherein the fixed end 81 is clamped in the inner groove 524, and the abutting end 82 abuts against a side of the protrusion 511 of the plunger 51 facing the non-closed end 518. In this embodiment, the stopper 8 is configured as a non-closed ring having elasticity and an opening, and the outer diameter of the stopper 8 is slightly larger than the outer diameter of the inner groove 524. When the stopper 8 is assembled in the production line, a radial force is applied to the stopper 8 to deform the stopper 8 into the inner groove 524, and the radial force is released, so that the stopper 8 is restored to its original shape with its outer edge (i.e., the fixed end 81) caught in the inner groove 524 and the abutting end 82 abutting against the protruding portion 511, thereby restricting the axial relative movement between the plunger 51 and the rod-side holder 52; by the stopper 8, the rod-side holder 52, the plunger 51 and the input rod 11 can be assembled into a small assembly, facilitating the packaging production fabrication and packaging of the pedal feel simulator assembly 100.

The stop piece 8 is directly made of steel materials by stamping, one step is in place, and the efficiency is high; or, the stop piece 8 is formed by punching steel into a straight strip and then bending the straight strip, so that one step is added, but the effect of saving materials can be achieved. In both cases, the stop can be made thinner and still be able to have the required strength.

The stop 8 can also be made of plastic by injection moulding, so that the stop of this embodiment is slightly thicker in order to ensure a strength comparable to that of the previously described manufacturing method, which also facilitates the development of the injection moulding process, or the stop is made by winding a spring wire, which is also thinner. The stopper 8 may be substantially in the shape of one of a circular ring, a polygonal ring, a triangular ring, and a U-shape.

The first force feedback member 3 is accommodated in the first accommodating member 4, the first force feedback member 3 is made of rubber, is configured to have a hollow cylindrical shape, is coaxially sleeved on the main shaft 2, and the length direction of the first force feedback member 3 is consistent with the length direction of the input rod 11. The longitudinal direction refers to the longitudinal direction or the axial direction, so that the feedback force of the first force feedback member 3 can more directionally feedback the force to the input rod 11. Optionally, the first force feedback element 3 protrudes on its hollow cylindrical inner and/or outer wall to form a thickened structure 31, radially abutting against the first receiving element 4. Thus, the remaining portion also has room for deformation.

The second force feedback member 7 is a power spring and is accommodated in the second accommodating member 5. Force feedback is achieved by the initial resistance and subsequent deformation of the second force feedback member 7 and the first force feedback member 3. It will be appreciated that the size, shape, rate of stiffness, pitch of the spring, wire diameter, inner diameter, material, arrangement (e.g. in series or in parallel), rate of stiffness, etc. of the second force feedback member 7 and the first force feedback member 3 may all have an effect on the characteristic curve of the overall force feedback mechanism. The desired parameters and characteristics may be obtained empirically, experimentally, and through user feedback. In addition, in order to provide a space margin for the deformation of the rubber and the initial power spring, the first receiving member 4 and the second receiving member 5 may be provided with a certain gap when receiving the force feedback mechanism.

Said first containing member 4 comprises an outer holder 41 and an inner holder 42 coaxially received within the outer holder 41, a receiving space being formed between the inner holder 42 and the outer holder 41, said first force feedback member 3 being arranged within the receiving space. The outer holder 41 includes a cylindrical outer body 411, an outer end cap 412 extending radially inward from one end portion of the outer body 411, and a cylindrical protrusion 413 extending in an axial direction, wherein the protrusion 413 has a diameter smaller than that of the outer body 411 to fit with a peripheral part (e.g., a bearing). The inner holder 42 includes a cylindrical inner body 421 and an inner end cap 422 extending radially outward from an end of the inner body 421, wherein the inner end cap 422 abuts against the outer end cap 412, and the outer body 411 of the outer holder 41 has a length larger than that of the inner body 421.

The gasket 6 is arranged in the first accommodating part 4, the gasket 6 is in a hollow ring shape and is arranged between the inner retainer 42 and the outer retainer 41, the inner wall of the gasket 6 abuts against the outer wall of the inner retainer 42, and the outer wall abuts against the inner wall of the outer retainer 41. The first force feedback member 3 abuts the inner end cap 422 at one end and the spacer 6 at the other end.

The outer holder 41 and the inner holder 42 are made of steel by punching or by machining. The first receiving member 4 is assembled by the outer holder 41 and the inner holder 42, so that the difficulty of processing a single piece is simplified, and sufficient strength can be ensured by stamping or machining a steel material. Alternatively, the outer holder 41 and the inner holder 42 may be integrally formed of plastic by injection molding or machining. The outer holder 41 and the inner holder 42 may be formed separately and then assembled together, or may be formed integrally.

One end of the second force feedback member 7 extends to the spacer 6 and the other end extends to the abutment 522, so that the positions of both ends of the second force feedback member 7 are defined.

When assembled, the outer body 411 of the outer holder 41 abuts against the outer wall of the rod-side holder 52 at the outer end 415 remote from the outer end cap 412.

Referring to fig. 6-7, another embodiment of a pedal feel simulator assembly 100 of the present invention is generally similar in construction to the embodiment shown in fig. 2-5, except that: the second containing member 5'. In this embodiment, the second receiving member 5 ' includes a rod-side holder 52 ', a plunger 51 ', and a connecting portion 53 ' connecting the rod-side holder 52 ' and the plunger 51 ', the rod-side holder 52 ' is coaxially sleeved outside the plunger 51 ', a receiving space for receiving the second force feedback member 7 is formed between the rod-side holder 52 ' and the plunger 51 ', the plunger 51 ' is sleeved outside the input rod 11, and the plunger 51 ' includes a closed end 517 ' and a non-closed end 518 ', and the closed end 517 ' closes an end of the input rod 11 facing the main shaft 2.

One end of the connecting portion 53 ' is fixedly disposed at a side close to the non-closed end 518 ' of the plunger 51 ', and the other end of the connecting portion 53 ' is fixed to the rod-side retainer 52 ', so that the rod-side retainer 52 ', the plunger 51 ' are fixed together, and the axial relative movement between the plunger 51 and the rod-side retainer 52 is restricted. The connecting portion 53 ' is formed integrally with the rod-side holder 52 ', the plunger 51 ', or three members are formed separately and then fixedly connected together by at least one of welding, bonding, and screwing.

It should be appreciated that the present invention is also directed to a decoupled brake booster 1000 that includes any of the pedal feel simulator assemblies 100 described above. For this reason, reference is made to the above explanations regarding the embodiments and features of decoupled brake booster 1000 with regard to pedal feel simulator assembly 100.

It should be understood that the decoupled brake booster of the present invention may be installed on a variety of vehicles, including gasoline vehicles, diesel vehicles, cars, trucks, buses, hybrid vehicles, electric vehicles, and the like. In particular, the decoupling type brake booster can be used for a new energy automobile with a main motor of the whole automobile. In addition, in the case of application to a diesel locomotive, the decoupled brake booster can be operated by means of an electronic control device, i.e. in the event of detection of a braking intention by the driver, the control unit sends a braking signal to the vehicle brake system, so that a braking action is carried out in real time.

It should be understood that all of the above preferred embodiments are exemplary and not restrictive, and that various modifications and changes in the specific embodiments described above, which would occur to persons skilled in the art upon consideration of the above teachings, are intended to be within the scope of the utility model.

Claims

1. A pedal feel simulator assembly (100) for a decoupled brake booster (1000), the decoupled brake booster (1000) having a pedal feel simulator for engagement with a brake pedal of a vehicle and a spindle (2), an input rod (11) of the pedal feel simulator being couplable and decouplable to the spindle (2), the pedal feel simulator assembly (100) comprising:

a force feedback mechanism for exerting a force feedback on the input rod (11) when the input rod (11) is applying a force towards the spindle (2) in coupled and decoupled conditions, the force feedback mechanism comprising a first force feedback (3) and a second force feedback (7);

the first accommodating part (4) is sleeved on the main shaft (2), and the first force feedback part (3) is accommodated in the first accommodating part (4); and

a second accommodating member (5, 5 ') sleeved on the input rod (11), the second accommodating member (5, 5') accommodating the second force feedback member (7), the second accommodating member (5, 5 ') comprising a rod-side holder (52, 52'), a plunger (51, 51 '), and a connecting portion (53, 53') connecting the rod-side holder (52, 52 ') and the plunger (51, 51'), the rod-side holder (52, 52 ') coaxially sleeved outside the plunger (51, 51'), a housing space accommodating the second force feedback member (7) being formed between the rod-side holder (52, 52 ') and the plunger (51, 51'), the plunger (51, 51 ') sleeved outside the input rod (11), the plunger (51, 51') comprising a closed end (517, 517 ') and a non-closed end (518, 518'), the closed end (517 ), 517') closing the end of the input rod (11) facing the main shaft (2).

2. The pedal feel simulator assembly (100) of claim 1, the connecting portion (53) comprising a seat (522), a projection (511) and a stop (8), the rod-side retainer (52) includes a cylindrical main body (521), the abutment (522) is configured to protrude inward along an inner wall of the cylindrical main body (521), the protrusion (511) is configured to protrude outward along the outer wall of the non-closed end (518) of the plunger (51), the plunger (51) is inserted into the rod-side holder (52), the side of the projection (511) thereof facing the closed end (517) abuts on a seat (522) of the rod-side holder (52), the stopper (8) abuts against the side of the projection (511) facing the non-closed end (518), and the projection (511) of the plunger (51) is sandwiched between the stopper (8) and the seat (522) of the rod-side holder (52).

3. The pedal feel simulator assembly (100) according to claim 2, characterized in that the inner periphery of the rod-side retainer (52) is configured with an inner groove (524), and the inner groove (524) is located on a side of the protrusion (511) facing the brake pedal at the pedal feel simulator assembly (100), the stopper (8) comprising a fixed end (81) and an abutting end (82), wherein the fixed end (81) is caught within the inner groove (524), and the abutting end (82) abuts against a side of the protrusion (511) of the plunger (51) facing the non-closed end (518).

4. The pedal feel simulator assembly (100) of claim 3, wherein said stop (8) is configured as a resilient, open, non-closed ring, said stop (8) having an outer diameter slightly larger than an outer diameter of the inner groove (524), said stop (8) being generally in the shape of one of a circular ring, a polygonal ring, and a U-shape.

5. The pedal feel simulator assembly (100) according to claim 4, characterized in that said stop member (8) is made directly from steel by stamping, or from steel by stamping followed by bending, or from plastic by injection molding, or from a spring wire winding.

6. The pedal feel simulator assembly (100) according to claim 1, wherein one end of said connecting portion (53 ') is fixedly disposed at a side close to the non-closed end (518') of the plunger (51 '), and the other end of said connecting portion (53') is fixed to the rod-side retainer (52 ') so as to connect said rod-side retainer (52') and the plunger (51 ') and restrict the relative axial movement between said plunger (51') and the rod-side retainer (52 '), said connecting portion (53') being formed integrally with the rod-side retainer (52 '), the plunger (51'), or three members being formed separately and then fixedly connected together by at least one of welding, bonding, and screwing.

7. The pedal feel simulator assembly (100) according to claim 1, wherein the plunger (51) has an inwardly projecting limit portion (516) on an inner wall thereof, the limit portion (516) being adjacent the closed end (517) for limiting axial relative movement between the end of the input rod (11) and the plunger.

8. The pedal feel simulator assembly (100) according to claim 1, characterized in that said first housing member (4) comprises an outer holder (41) and an inner holder (42) coaxially housed within the outer holder (41), said outer holder (41) comprising a cylindrical outer body (411), said inner holder (42) and outer holder (41) forming a housing space closed at one end therebetween, said outer holder (41) having a length greater than that of the inner body (421).

9. The pedal feel simulator assembly (100) according to claim 8, characterized in that said outer retainer (41) and said inner retainer (42) are made of steel by stamping, or of plastic by injection molding, or are constructed in one piece.

10. The pedal feel simulator assembly (100) according to claim 9, wherein said first force feedback member (3) is accommodated in a closed end accommodating space of said first accommodating member (4) and coaxially sleeved outside said main shaft (2), said first force feedback member (3) is made of rubber and is configured to have a hollow cylindrical shape, and a length direction of said first force feedback member (3) is identical to a length direction of said input rod (11).

11. The pedal feel simulator assembly (100) according to claim 10, characterized in that said first force feedback member (3) is bulged in its hollow cylindrical inner and/or outer wall to form a thickened structure (31) radially abutting against said first containing member (4).

12. The pedal feel simulator assembly (100) according to claim 11, characterized in that a gasket (6) is arranged in said first housing member (4), said gasket (6) is in the shape of a hollow ring and is arranged between an inner holder (42) and an outer holder (41), the inner wall of the gasket (6) abuts against the outer wall of said inner holder (42), the outer wall abuts against the inner wall of said outer holder (41), and said first force feedback member (3) abuts against the closed end of the first housing member (4) at one end and the gasket (6) at the other end.

13. The pedal feel simulator assembly (100) according to claim 12, characterized in that said force feedback mechanism comprises a second force feedback member (7), said second force feedback member (7) being a power spring housed in a housing space formed between said rod-side retainer (52) and a plunger (51), one end of said second force feedback member (7) extending to said spacer (6) and the other end extending to a seat (522).

14. A decoupled brake booster (1000) characterized in that it comprises a pedal feel simulator assembly (100) according to any one of claims 1 to 13.