CN113815581B

CN113815581B - Actuating mechanism of initiative brake

Info

Publication number: CN113815581B
Application number: CN202111011960.4A
Authority: CN
Inventors: 马光; 项春亮; 黄耿青; 石文光
Original assignee: Shenzhen Boyong Technology Co ltd
Current assignee: Shenzhen Boyong Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2024-02-13
Anticipated expiration: 2041-08-31
Also published as: CN113815581A

Abstract

The invention discloses an actuating mechanism for active braking, which comprises a mounting plate, a first hinge piece and a motor, wherein the motor is rotationally connected with the mounting plate through the first hinge piece, the mounting plate is fixed with a vehicle body, a coupler is fixed on the outer side of an output shaft of the motor, and a fixing piece is arranged at one end of the coupler, which is far away from the motor; the screw sleeve is driven to rotate by the motor, the screw sleeve is driven to generate radial displacement by the screw sleeve through the transmission of the screw thread pair, and the screw rod drives the pedal arm to rotate around the pedal rotating shaft, so that the effect of active braking is achieved; the independence is high, and the braking system of the original vehicle is not influenced; the response is quick and reliable, the problem of response hysteresis caused by elastic deformation of the pull wire type is avoided, and the device has the advantages of simple structure and low cost.

Description

Actuating mechanism of initiative brake

Technical Field

The invention relates to the technical field of automatic driving, in particular to an actuating mechanism for active braking.

Background

The active braking system adopts a radar or a camera to measure the distance between the active braking system and a preceding vehicle or an obstacle, then the measured distance is compared with an alarm distance and a safety distance by utilizing a data analysis module, alarm prompt is carried out when the measured distance is smaller than the alarm distance, and when the measured distance is smaller than the safety distance, the control unit of the active braking system drives an actuating mechanism to drive the vehicle to automatically brake, so that the vehicle is protected for safe traveling.

There are two main types of related actuators on the market: the actuating mechanism is an ESC or electrohydraulic braking system in the braking system, the two actuating mechanisms are key parts of the braking system, a large number of real vehicles are required to be matched for shaping, the internal control logic and parameter setting are extremely important for the dynamic safety of the vehicle, the external is not opened, and the key parts are considered as key black box parts related to the braking safety. The adoption of the actuating mechanism requires a deep technical work bottom and high design matching cost, and also needs to face an extremely deep patent barrier, and the other type is similar to the patent CN207257640U and the patent CN206569059U, which adopt a mode that a motor pulls a stay wire and the stay wire drives a brake pedal to serve as the actuating mechanism. The scheme of the stay wire type can lead to response lag of the actuating mechanism and influence the effect of active braking because elastic deformation exists in a certain tension range of the stay wire (generally a steel wire rope), and plastic deformation can be generated after multiple actions, so that the response lag of the actuating mechanism is further caused and the effect of active braking is more influenced. In addition, the wire-pulling scheme needs an additional pulley mechanism to guide the trend of the wire, the number of parts is large, the structure is complex, and therefore, an actuating mechanism for active braking is provided.

Disclosure of Invention

The invention aims to provide an actuating mechanism for active braking, which has the advantages of simple structure, low cost and reliable and rapid response, so as to solve the problems in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the actuating mechanism of the active brake comprises a mounting plate, a first hinge piece and a motor, wherein the motor is rotationally connected with the mounting plate through the first hinge piece, the mounting plate is fixed with a vehicle body, a coupler is fixed on the outer side of an output shaft of the motor, and a fixing piece is arranged at one end, far away from the motor, of the coupler; the screw sleeve is connected with the screw rod in a threaded mode, a connecting shaft is fixed at one end, away from the screw sleeve, of the screw rod, a second hinge piece is connected to one end, away from the screw rod, of the connecting shaft, a pedal arm is movably connected to the connecting shaft through the second hinge piece, a pedal rotating shaft is connected to the upper end of the pedal arm in a rotating mode, the pedal rotating shaft is connected with a vehicle body, and a lubricating piece is mounted on the outer side of the screw sleeve.

Preferably, the lubrication piece is including fixing the mounting bracket in the swivel nut outside, top one side of mounting bracket is fixed with first connecting plate, the bottom of first connecting plate is fixed with the U type piece, the inboard rotation of U type piece is connected with the rotor plate, first connecting plate is kept away from the one end of mounting bracket is fixed with the second connecting plate, the bottom of rotor plate is fixed with spacing seat, rotate on the spacing seat and be connected with the commentaries on classics roller, the surface coating of commentaries on classics roller has lubricating grease, install the clamp on the second connecting plate, can lubricate it when the screw rod removes through the lubrication piece, guarantee that frictional movement is more smooth and easy between screw rod and the swivel nut.

Preferably, the thickness of the lubricating grease is two millimeters, the lubricating grease is uniformly coated on the outer surface of the rotating roller, and the lubricating grease can be uniformly scraped on the screw rod through the rotation of the rotating roller.

Preferably, the compressing element comprises a sliding sleeve fixedly sleeved on the second connecting plate, a sliding rod is connected in a sliding manner in the sliding sleeve, a pressing block is fixed at the bottom end of the sliding rod, a spring is fixed on the pressing block, one end of the spring is fixed with the bottom of the second connecting plate, a butt bead is installed at the bottom of the pressing block, a pulling block is fixed at the top end of the sliding rod, and a rotating roller with lubricating grease can be tightly attached to the surface of a screw rod through the compressing element.

Preferably, a brake pedal is fixed at the lower end of the pedal arm, and anti-skid patterns are arranged on the brake pedal, so that the friction force on the surface of the brake pedal is improved.

Preferably, the fixing piece comprises a threaded shaft fixedly connected with the coupler, a sleeve shaft is connected to the outer side of the threaded shaft in a threaded manner, the sleeve shaft is fixed to the bottom end of the threaded sleeve, and the threaded sleeve and the motor are convenient to install and detach.

Preferably, the screw sleeve and the screw rod are made of stainless steel materials, so that the service lives of the screw sleeve and the screw rod are prolonged.

Compared with the prior art, the invention has the beneficial effects that:

the motor rotates to drive the threaded sleeve to rotate, the threaded sleeve drives the screw rod to generate radial displacement through the threaded pair transmission, and the screw rod drives the pedal arm to rotate around the pedal rotating shaft, so that the active braking effect is achieved; the independence is high, and the braking system of the original vehicle is not influenced; the response is quick and reliable, the problem of response hysteresis caused by elastic deformation of the pull wire type is avoided, and the device has the advantages of simple structure and low cost.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a perspective view of the overall appearance of the present invention;

FIG. 3 is a schematic view of a fastener according to the present invention;

FIG. 4 is a schematic view of the structure of a lubricant according to the present invention;

fig. 5 is an enlarged view of area a in fig. 4.

In the figure: 1-a mounting plate; 2-a first hinge; 3-an electric motor; a 4-coupling; 5-fixing pieces; 6-a screw sleeve; 7-a screw; 8-connecting shafts; 9-a second hinge; 10-pedal arm; 11-pedal spindle; 12-a brake pedal; 13-a lubricant; 14-a threaded shaft; 15-sleeve shaft; 16-mounting rack; 17-a first connection plate; 18-U-shaped blocks; 19-rotating plate; 20-a second connection plate; 21-a limiting seat; 22-rotating rollers; 23-lubricating grease; 24-pressing piece; 25-sliding sleeve; 26-slide bar; 27-briquetting; 28-a spring; 29-abutment beads; 30-pulling the block.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1 and 2, an actuating mechanism of active braking in the drawing comprises a mounting plate 1, a first hinge piece 2 and a motor 3, wherein the motor 3 is rotationally connected with the mounting plate 1 through the first hinge piece 2, the mounting plate 1 is fixed with a vehicle body, a coupler 4 is fixed on the outer side of an output shaft of the motor 3, and a fixing piece 5 is arranged at one end, far away from the motor 3, of the coupler 4; the screw sleeve 6 and the screw rod 7, screw rod 7 threaded connection is in the inboard of screw sleeve 6, and the one end that screw rod 7 kept away from screw sleeve 6 is fixed with connecting axle 8, and the one end that connecting axle 8 kept away from screw rod 7 is connected with second articulated elements 9, and connecting axle 8 is through second articulated elements 9 swing joint there being pedal arm 10, and the upper end rotation of pedal arm 10 is connected with pedal pivot 11, and pedal pivot 11 is connected with the automobile body, and lubricating piece 13 is installed in the outside of screw sleeve 6.

As shown in fig. 1, in order to increase the friction force on the surface of the brake pedal 12, the brake pedal 12 is fixed to the lower end of the pedal arm 10, and anti-skid patterns are provided on the brake pedal 12.

Meanwhile, as shown in fig. 1 and 3, in order to facilitate the installation and the removal of the screw sleeve 6 and the motor 3, the fixing member 5 includes a threaded shaft 14 fixedly connected with the coupling 4, a sleeve shaft 15 is screwed on the outer side of the threaded shaft 14, and the sleeve shaft 15 is fixed with the bottom end of the screw sleeve 6.

In addition, as shown in fig. 1, in order to improve the service life of the actuator, the sleeve 6 and the screw 7 are made of stainless steel.

When in operation, the device comprises: the motor 3 is connected with a vehicle body mounting point in a hinged mode, an internal thread is arranged in the interior of the threaded sleeve 6 and matched with the threaded rod 7, the threaded sleeve 6 is connected with the motor 3 through the coupler 4, an external thread is arranged outside the threaded rod 7 and matched with the threaded sleeve 6, the other end of the threaded sleeve is connected with the pedal arm 10 in a hinged mode, the motor 3 is controlled to rotate through the vehicle active brake controller when an active brake signal is generated, the motor 3 drives the threaded sleeve 6 to rotate, the threaded sleeve 6 drives the threaded rod 7 to generate radial displacement through screw pair transmission, and the threaded rod 7 drives the pedal arm 10 to rotate around the pedal rotating shaft 11, so that the active brake effect is completed.

Example 2

As shown in fig. 1 and 4, this embodiment further illustrates example 1, the outside of the threaded sleeve 6 in the drawing is provided with the lubrication piece 13, the lubrication piece 13 includes the mounting bracket 16 fixed in the outside of the threaded sleeve 6, one side of the top of the mounting bracket 16 is fixed with the first connecting plate 17, the bottom of the first connecting plate 17 is fixed with the U-shaped piece 18, the inboard rotation of the U-shaped piece 18 is connected with the rolling plate 19, one end that the first connecting plate 17 kept away from the mounting bracket 16 is fixed with the second connecting plate 20, the bottom of the rolling plate 19 is fixed with the spacing seat 21, the rotation is connected with the roller 22 on the spacing seat 21, the surface coating of roller 22 has lubricating grease 23, install the compress tightly piece 24 on the second connecting plate 20, can lubricate it when the screw rod 7 moves through the lubrication piece 13, guarantee that the frictional motion between screw rod 7 and the threaded sleeve 6 is more smooth.

As shown in fig. 4, the thickness of the grease 23 is two millimeters so that the grease 23 can be uniformly scraped off the screw 7, and the grease 23 is uniformly applied to the outer surface of the roller 22.

When the screw 7 is lubricated: the grease 23 on the surface of the rotating roller 22 connected with the rotating plate 19 is tightly attached to the outer surface of the screw rod 7 by the pressing piece 24, the installation frame 16 is driven to rotate by the rotation of the threaded sleeve 6, the installation frame 16 drives the rotating roller 22 to rotate outside the screw rod 7, at the moment, the screw rod 7 also generates radial displacement to generate relative motion with the surface of the grease 23, part of the grease 23 is scraped off, the screw rod 7 is lubricated, and the smooth friction motion between the screw rod 7 and the threaded sleeve 6 is ensured.

Example 3

As shown in fig. 4 and 5, this embodiment further illustrates example 1, the lubrication element 13 in the drawing includes a mounting frame 16 fixed on the outer side of the screw sleeve 6, a first connecting plate 17 is fixed on one side of the top of the mounting frame 16, a U-shaped block 18 is fixed on the bottom of the first connecting plate 17, a rotating plate 19 is rotatably connected to the inner side of the U-shaped block 18, a second connecting plate 20 is fixed on one end of the first connecting plate 17 far away from the mounting frame 16, a limiting seat 21 is fixed on the bottom of the rotating plate 19, a rotating roller 22 is rotatably connected to the limiting seat 21, grease 23 is coated on the outer surface of the rotating roller 22, and a pressing element 24 is mounted on the second connecting plate 20.

As shown in fig. 5, in order to attach the roller 22 with the grease 23 to the surface of the screw 7, the pressing member 24 includes a sliding sleeve 25 fixedly sleeved on the second connecting plate 20, the sliding sleeve 25 is slidably connected with a sliding rod 26, a pressing block 27 is fixed at the bottom end of the sliding rod 26, a spring 28 is fixed on the pressing block 27, one end of the spring 28 is fixed at the bottom of the second connecting plate 20, an abutting bead 29 is mounted at the bottom of the pressing block 27, and a pulling block 30 is fixed at the top end of the sliding rod 26.

When the roller 22 is replaced: the sliding rod 26 is pulled to slide on the inner side of the sliding sleeve 25 through the pulling block 30, the pressing block 27 at the bottom of the sliding rod 26 compresses the spring 28, the abutting bead 29 is not in contact with the rotating plate 19, then the rotating plate 19 is manually adjusted, the rotating plate 19 lifts the rotating roller 22 to a height, the rotating roller 22 is taken off from the rotating shaft, then a new rotating roller 22 is sleeved on the rotating shaft, the pulling block 30 is loosened, the spring 28 resets to push the abutting bead 29 at one end of the pressing block 27 to be in contact with the rotating plate 19 again, and the rotating plate 19 drives the rotating roller 22 at the bottom to be pressed against the surface of the screw 7.

In this scheme, the preferred Y80M1-2 model of motor 3, the power supply interface of motor passes through the switch and connects power supply system, and motor 3 operation circuit is conventional motor 3 corotation control procedure, and the circuit operation is current conventional circuit, and circuit and the control that involve in this scheme are prior art, do not carry out too much in this and describe here.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An actuator for active braking, comprising:

the automobile comprises a mounting plate (1), a first hinging piece (2) and a motor (3), wherein the motor (3) is rotationally connected with the mounting plate (1) through the first hinging piece (2), the mounting plate (1) is fixed with an automobile body, a coupler (4) is fixed on the outer side of an output shaft of the motor (3), and a fixing piece (5) is arranged at one end, far away from the motor (3), of the coupler (4);

the screw sleeve (6) and screw rod (7), screw rod (7) threaded connection is in the inboard of screw sleeve (6), the screw rod (7) keep away from the one end of screw sleeve (6) is fixed with connecting axle (8), the one end that connecting axle (8) kept away from screw rod (7) is connected with second articulated elements (9), connecting axle (8) are through second articulated elements (9) swing joint has footboard arm (10), the upper end rotation of footboard arm (10) is connected with footboard pivot (11), footboard pivot (11) are connected with the automobile body, lubricating piece (13) are installed in the outside of screw sleeve (6);

the lubricating piece (13) comprises a mounting frame (16) fixed on the outer side of the screw sleeve (6), a first connecting plate (17) is fixed on one side of the top of the mounting frame (16), a U-shaped block (18) is fixed on the bottom of the first connecting plate (17), a rotating plate (19) is rotatably connected to the inner side of the U-shaped block (18), a second connecting plate (20) is fixed on one end, away from the mounting frame (16), of the first connecting plate (17), a limiting seat (21) is fixed on the bottom of the rotating plate (19), a rotating roller (22) is rotatably connected to the limiting seat (21), lubricating grease (23) is coated on the outer surface of the rotating roller (22), and a pressing piece (24) is mounted on the second connecting plate (20).

The lubricating grease (23) on the surface of the rotating roller (22) connected with the rotating plate (19) is tightly attached to the outer surface of the screw rod (7) by utilizing the compressing piece (24), the mounting frame (16) is driven to rotate by the rotation of the threaded sleeve (6), the mounting frame (16) drives the rotating roller (22) to rotate outside the screw rod (7), at the moment, the screw rod (7) can also generate radial displacement to generate relative motion with the surface of the lubricating grease (23), and then part of the lubricating grease (23) is scraped to lubricate the screw rod (7);

the compression piece (24) comprises a sliding sleeve (25) fixedly sleeved on the second connecting plate (20), a sliding rod (26) is connected to the sliding sleeve (25) in a sliding mode, a pressing block (27) is fixed to the bottom end of the sliding rod (26), a spring (28) is fixed to the pressing block (27), one end of the spring (28) is fixed to the bottom of the second connecting plate (20), a butt bead (29) is mounted to the bottom of the pressing block (27), and a pulling block (30) is fixed to the top end of the sliding rod (26).

2. An actuator for an active brake as defined in claim 1, wherein: the thickness of the lubricating grease (23) is two millimeters, and the lubricating grease (23) is uniformly coated on the outer surface of the rotating roller (22).

3. An actuator for an active brake as defined in claim 1, wherein: the lower end of the pedal arm (10) is fixedly provided with a brake pedal (12), and the brake pedal (12) is provided with anti-skid patterns.

4. An actuator for an active brake as defined in claim 1, wherein: the fixing piece (5) comprises a threaded shaft (14) fixedly connected with the coupler (4), a sleeve shaft (15) is connected to the outer side of the threaded shaft (14) in a threaded mode, and the sleeve shaft (15) is fixed to the bottom end of the threaded sleeve (6).

5. An actuator for an active brake as defined in claim 1, wherein: the screw sleeve (6) and the screw rod (7) are made of stainless steel materials.