CN110962814A

CN110962814A - Brake auxiliary device for vehicle

Info

Publication number: CN110962814A
Application number: CN201911324671.2A
Authority: CN
Inventors: 杨元明
Original assignee: Chongqing Hetian Electronic Technology Co Ltd
Current assignee: Chongqing Hetian Electronic Technology Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-04-07

Abstract

The invention discloses a brake auxiliary device for a vehicle, which comprises a connector, a spring fixing sleeve, a compression spring, a nut, a large gear, a threaded sleeve, a screw rod component and a brake rod component, wherein when a motor drives the large gear to rotate in the forward direction, an internal spline of the large gear drives an external spline of the threaded sleeve to rotate, an internal thread of the threaded sleeve pushes the screw rod component to move rightwards, the threaded sleeve also moves rightwards under the action of the nut, the threaded sleeve keeps moving rightwards while being driven to rotate, and the nut keeps static; because the motion radius of the bull gear is larger than that of the screw assembly, the screw assembly moves rightwards by double displacement when the bull gear rotates for a circle through the differential effect, and the time is reduced by one time under the condition of moving the same displacement, so that the reaction speed is accelerated. The invention improves the brake reaction speed, simplifies the device structure, reduces the assembly cost and enhances the practicability.

Description

Brake auxiliary device for vehicle

Technical Field

The invention relates to the technical field of automobiles, in particular to a brake auxiliary device for a vehicle.

Background

For a traditional fuel automobile or a new energy automobile, the brake work is to control a pedal in a cab through a driver so as to control a brake control system connected between a front wheel and the pedal of the automobile, so that the rotating speed of the front wheel is controlled to achieve the brake work efficiency. At brake control system's biography accuse in-process, the engine can provide this system electric power or mechanical transmission supplementary, and then makes the footboard of trampling that the driver can be more relaxed in order to brake, contains the brake auxiliary device among the brake control system, and it is generally the body of rod structure that can transversely stretch out and draw back, and it is along with the lift of footboard and receives motor drive, and then the correspondence is flexible to the vehicle fore-and-aft direction, compresses tightly or relaxs the shaft between the front wheel two-wheeled then, thereby control vehicle brake.

In prior brake assistance devices, such as the invention patent No. CN601680077071.0, a brake assistance system with an electric motor, which mainly comprises a cylinder controlled from a brake pedal by a transmission chain comprising a brake in the form of an electric motor, usually acting alone or together with the thrust of the pedal, to generate a thrust force exerted on the primary piston of the master cylinder by a thrust rod and a reaction disc on which an auxiliary piston is pushed by an intermediate piston, and in parallel a plunger which may also push against the reaction disc under certain conditions. This patent aims to increase the speed of installation of the device. However, the number of automobiles in China is increased dramatically year by year, road traffic accidents are frequent, the main processing means for emergency events is braking, and the control of braking is an important means for avoiding accidents, so the reaction time of the auxiliary braking device determines the occurrence of the accidents to a great extent, and the patents only adopt the traditional piston transmission, cannot improve the reaction and movement speed of the device, and have complex installation structure and high assembly cost.

In view of the foregoing, there is a need in the art for a brake assist device that solves the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a brake auxiliary device for a vehicle, which improves the brake reaction speed, simplifies the device structure, reduces the assembly cost and enhances the practicability.

The technical scheme adopted by the invention for solving the technical problems is as follows: a brake auxiliary device for a vehicle comprises a connector, a spring fixing sleeve, a compression spring, a nut, a large gear, a threaded sleeve, a screw assembly and a brake rod assembly, wherein the spring fixing sleeve is of a hollow structure and is sleeved on the brake rod assembly; the compression spring is sleeved on the brake rod assembly, the bottom of the compression spring is abutted against the top of the screw assembly, and the top of the compression spring is abutted against the bottom of the spring fixing sleeve; the top of the brake rod assembly is plugged into the interior of the screw assembly from the bottom of the screw assembly, the top of the brake rod assembly penetrates out of the screw assembly and penetrates through the spring fixing sleeve to be fixedly connected with the bottom of the connector, and the bottom of the brake rod assembly is limited at the bottom of the screw assembly; the screw rod assembly extends into the screw sleeve from the bottom of the screw sleeve and is in threaded connection with the inside of the screw sleeve; the bull gear is sleeved on the screw sleeve and meshed with the screw sleeve; the nut sleeve is arranged on the screw sleeve and is in threaded connection with the screw sleeve, and the position of the nut relative to the large gear is far away from the screw assembly.

The technical principle adopted by the invention for solving the technical problems is as follows: the connector is of a rod body structure, the top end of the connector is connected with a brake pedal in an automobile cab, through holes are respectively formed in the two symmetrical side end faces on the bottom end of the connector, through holes corresponding to the through holes in the connector are respectively formed in the two symmetrical side end faces on the top end of the displacement rod, when the connector is installed, bolts or other limiting parts can be inserted into the through holes, so that the connector is fixedly connected with the displacement rod, and the connector can also be fixedly connected by directly welding or buckling the connector; the spring fixing sleeve is of a hollow structure, the longitudinal section of the spring fixing sleeve is in a circular ring shape, opening surfaces at two ends of the spring fixing sleeve are respectively connected with the bottom of the connector and the compression spring in a compression joint mode, namely, a circular ring-shaped groove is formed at the bottom of the connector, the circular ring-shaped caliber at the top of the spring fixing sleeve is embedded into the groove to form butt joint, and the displacement rod penetrates through the spring fixing sleeve and is fixedly connected with the connector; the nut is of a sleeve structure, the outer end face of the nut is a smooth surface, a fourth thread is arranged in the nut, the thread is a left-handed thread, the nut is used for cooperating with a threaded sleeve to move, and in actual application, the nut is fixed in a brake control system through a connecting piece in the brake control system or is directly fixedly welded with the interior of the brake control system; an internal spline on the large gear is correspondingly meshed with an external spline on the threaded sleeve, so that the rotation of the large gear drives the threaded sleeve to rotate, the large gear is connected with a motor in a brake control system, and a driving wheel driven by the motor can be arranged to be meshed with the large gear according to actual conditions so as to drive the large gear to rotate; the screw sleeve is used for cooperating the screw rod component to move; the displacement rod is plugged into the screw rod assembly, and the bottom of the displacement rod is limited at the bottom of the screw rod assembly, so that the displacement rod is prevented from being separated from the screw rod assembly; the brake lever assembly limits the bottom of the displacement rod between the brake lever assembly and the screw rod assembly, and when the connector applies forward and backward acting force to the displacement rod in the horizontal direction, the displacement rod drives the screw rod assembly to move along with the displacement rod assembly.

The working principle adopted by the invention for solving the technical problems is as follows: when the motor drives the large gear to rotate in the forward direction, the internal spline of the large gear drives the external spline of the threaded sleeve to rotate, the internal thread of the threaded sleeve pushes the screw rod assembly to move rightwards, the threaded sleeve also moves rightwards under the action of the nut, the threaded sleeve keeps moving rightwards while being driven to rotate, and the nut keeps static; the motor drives the bull gear to rotate reversely, and the bull gear moves reversely according to the process. Because the motion radius of the bull gear is larger than that of the screw assembly, the screw assembly moves rightwards by double displacement when the bull gear rotates for a circle through the differential effect, and the time is reduced by one time under the condition of moving the same displacement, so that the reaction speed is accelerated.

In addition, if the motor is out of control, the brake plate is stepped to push the brake rod to move rightwards, the displacement rod drives the screw rod assembly to move rightwards, the screw rod assembly cannot rotate due to the fact that horizontal acting force is propelling force, meanwhile, the limiting piece supports the displacement rod, and therefore the whole device except the large gear moves rightwards, and the purpose of braking is achieved; after the driver loosens the brake block, the brake pedal is lifted, at the moment, the compression spring is still in a telescopic state, and under the environment without external acting force, the compression spring contracts, the connector moves leftwards and simultaneously drives the displacement rod to move leftwards, so that the brake rod assembly is reset leftwards, and the brake pedal is driven to reset.

The invention has the beneficial effects that: the device has simple structure, convenient installation among components and low assembly cost, accelerates the reaction speed by a differential transmission principle, further shortens the brake response time, and greatly enhances the driving safety of the automobile; besides, under the condition that the motor fails, the brake can be carried out, and the practicability is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:

FIG. 1 is an exploded view of a brake assist device for a vehicle according to the present invention;

FIG. 2 is a cross-sectional view of a brake assist apparatus for a vehicle of the present invention;

FIG. 3 is an enlarged schematic view of a threaded sleeve of the brake assist device for a vehicle of the present invention;

FIG. 4 is an enlarged schematic view of a bull gear of a brake assist device for a vehicle according to the present invention;

FIG. 5 is an enlarged schematic view of a screw assembly in a brake assist device for a vehicle according to the present invention;

FIG. 6 is an enlarged schematic view of a brake lever assembly of the brake assist device for a vehicle of the present invention;

in the figure: 1. a connector; 2. a spring fixing sleeve; 3. a compression spring; 4. a nut; 5. a bull gear; 6. a threaded sleeve; 7. a screw assembly; 8. a brake lever assembly; 501. insection; 502. hollowing out; 503. an internal spline; 601. a second thread; 602. an external spline; 603. a base; 701. a screw; 702. a connecting plate; 801. a displacement rod; 802. and a limiting plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.

It should be noted that, in the present application, the terms "first", "second", "third" and "fourth" in the "first thread, second thread, third thread and fourth thread" are used as the substitute, and are not used to distinguish the difference of the positions or the thread turning directions; in this embodiment, the left-right direction is a horizontal left-right direction as shown in fig. 1, with the top of the part corresponding to the left and the bottom of the part corresponding to the right.

In embodiment 1, as shown in fig. 1 and 2, the brake device includes a connector 1, a spring fixing sleeve 2, a compression spring 3, a nut 4, a gearwheel 5, a threaded sleeve 6, a screw assembly 7 and a brake lever assembly 8, wherein the spring fixing sleeve 2 is of a hollow structure and is sleeved on the brake lever assembly 8; the compression spring 3 is sleeved on the brake rod assembly 8, the bottom of the compression spring is abutted against the top of the screw assembly 7, and the top of the compression spring is abutted against the bottom of the spring fixing sleeve 2; the top of the brake rod assembly 8 is plugged into the screw assembly 7 from the bottom of the screw assembly, the top of the brake rod assembly 8 penetrates through the screw assembly 7 and penetrates through the spring fixing sleeve 2 to be fixedly connected with the bottom of the connector 1, and the bottom of the brake rod assembly 8 is limited at the bottom of the screw assembly 7; the screw rod assembly 7 extends into the bottom of the screw sleeve 6 and is in threaded connection with the inside of the screw sleeve 6; the bull gear 5 is sleeved on the threaded sleeve 6 and meshed with the threaded sleeve; the nut 4 is sleeved on the threaded sleeve 6 and is in threaded connection with the threaded sleeve 6, and the position of the nut 4 relative to the large gear 5 is far away from the screw assembly 7.

The connector 1 is of a rod body structure, the top end of the connector is connected with a brake pedal in an automobile cab, through holes are respectively formed in the two symmetrical side end faces on the bottom end of the connector, through holes corresponding to the through holes in the connector 1 are respectively formed in the two symmetrical side end faces on the top end of the displacement rod 801, when the connector is installed, bolts or other limiting parts can be inserted into the through holes, so that the connector 1 and the displacement rod 801 are fixedly connected, and the connector 1 can also be fixedly connected in a mode of directly welding or buckling the like; the spring fixing sleeve 2 is of a hollow structure, the longitudinal section of the spring fixing sleeve is annular, the opening surfaces at two ends of the spring fixing sleeve are respectively connected with the bottom of the connector 1 and the compression spring 3 in a compression joint mode, namely, an annular groove is formed in the bottom of the connector, the annular caliber at the top of the spring fixing sleeve 2 is embedded into the groove to form butt joint, and the displacement rod 801 penetrates through the spring fixing sleeve 2 and is fixedly connected with the connector 1; the nut 4 is of a sleeve structure, the outer end face of the nut is a smooth surface, a fourth thread is arranged in the nut, the thread is a left-handed thread, the nut 4 is used for cooperating with the threaded sleeve 6 to move, and in actual application, the nut 4 is fixed in a brake control system through a connecting piece in the brake control system or is directly fixedly welded with the interior of the brake control system; an internal spline 503 on the gearwheel 5 is correspondingly meshed with an external spline 602 on the screw sleeve 6, so that the rotation of the gearwheel 5 drives the screw sleeve 6 to rotate, the gearwheel 5 is connected with a motor in a brake control system, and a driving wheel driven by the motor can be arranged to be meshed with the gearwheel 5 according to actual conditions so as to drive the gearwheel 5 to rotate; the screw sleeve 6 is used for cooperating the movement of the screw rod component 7; the displacement rod 801 is plugged into the screw assembly 7, and the bottom of the displacement rod 801 is limited at the bottom of the screw assembly 7, so that the displacement rod 801 is prevented from being separated from the screw assembly 7; the brake lever assembly 7 limits the bottom of the displacement rod 801 between the brake lever assembly and the screw assembly 7, and when the connector 1 applies a front-back acting force to the displacement rod 801 in the horizontal direction, the displacement rod 801 drives the screw assembly 7 to move along with the displacement rod 801.

When the motor drives the large gear 5 to rotate in the forward direction, the internal spline of the large gear drives the external spline of the threaded sleeve 6 to rotate, the internal thread of the threaded sleeve 6 pushes the screw rod assembly 7 to move rightwards, the threaded sleeve 6 also moves rightwards under the action of the nut 4, the threaded sleeve 6 keeps moving rightwards while being driven to rotate, and the nut 4 keeps static; the motor drives the big gear wheel 5 to rotate reversely, and the big gear wheel moves reversely according to the process. Because the motion radius of the bull gear 5 is larger than that of the screw component 7, through the differential effect, when the bull gear 5 rotates for a circle, the screw component 7 moves rightwards for double displacement, and the time is reduced by one time under the condition of moving the same displacement, so that the reaction speed is accelerated.

In addition, if the brake plate is stepped to push the brake rod 1 to move rightwards under the condition that the motor is out of control, the displacement rod 801 drives the screw assembly 7 to move rightwards, the screw assembly 7 cannot rotate due to the fact that horizontal acting force is propelling force, meanwhile, the limiting piece 7 supports the displacement rod 801, and then the whole device except the large gear 5 moves rightwards, and therefore the purpose of braking is achieved; after the driver loosens the brake block, the brake pedal is lifted, at this moment, the compression spring 3 is still in a telescopic state, under the environment without external acting force, the compression spring 3 contracts, the connector 1 moves leftwards and simultaneously drives the displacement rod 801 to move leftwards, so that the brake rod assembly 8 is reset leftwards, and the brake pedal is driven to reset.

Further, as shown in fig. 4, the large gear 5 is a gear structure and is circular, an inner side wall of the large gear is provided with an inner spline 503, an outer side wall of the large gear is provided with a tooth pattern 501, and a hollow 502 is formed between the outer side and the inner side of the large gear. When the device is installed, the screw sleeve 6 is inserted into the inner ring of the large gear 5, the large gear 5 is sleeved on the external spline 602 of the screw sleeve 6, the internal spline 503 is matched with the external spline 602, the rotation of one spline drives the rotation of the other spline, and further, the large gear 5 or the screw sleeve 6 corresponding to the spline rotates along with the rotation; the insection 501 arranged on the outer side wheel wall of the big gear 5 is used for being meshed with a driving wheel controlled by a motor or being meshed with gears in other brake control systems, so that the big gear 5 is driven to rotate; the hollow 502 is used to reduce the weight of the bull gear 5, making it less expensive to drive. Two symmetrical sides on the outer end face of the nut 4 are respectively provided with a protrusion, the inner ring edge of the large gear 5 extends towards the direction of the nut 4 to form a flange, the height of the flange is larger than or equal to the distance between the nut 4 and the external spline 602 so as to prevent the large gear 5 from sliding onto a second thread 601 formed on the outer end face of the screw sleeve 6, and meanwhile, the protrusion on the nut 4 resists the leftward movement of the large gear 5.

Further, as shown in fig. 3, the threaded sleeve 6 is a sleeve structure, a first thread is formed inside the threaded sleeve, a second thread 601 and an external spline 602 are formed on an outer end surface of the threaded sleeve, the position of the second thread 601 is far away from the bottom of the threaded sleeve 6 relative to the position of the external spline 602, a base 603 is formed on the bottom of the threaded sleeve 6, the base 603 is a circular ring structure, and the diameter of an inner ring of the circular ring structure is correspondingly equal to the diameter of the threaded sleeve 6. The turning direction of the first thread corresponds to the option of the screw 701 on the screw assembly 7, the screw sleeve 6 rotates to drive the screw assembly 7 to rotate, the second thread 601 is matched with the fourth thread in the nut 4, and the screw sleeve 6 moves in the horizontal direction under the action of the fourth thread. The diameter of the second thread 601 is smaller than the diameter of the external spline 602, and the diameter of the external spline 602 is smaller than the diameter of the base 603; the second thread 601, the external spline 602 and the base 603 are all in ascending order in axial and radial positions, and further, after the nut 4 is sleeved on the threaded sleeve 6, the large gear 5 cannot be separated from the threaded sleeve 6 in any movement.

Further, as shown in fig. 5 and 6, the screw assembly 7 is a sleeve structure, and includes a screw 701; a third thread is arranged outside the screw 701, and a connecting plate 702 is fixedly connected to the bottom of the screw; the connecting plate 702 is a plate-shaped structure, and a through hole is formed in the end face of the middle part of the connecting plate, and the diameter of the through hole is equal to the outer diameter of the screw 701 correspondingly. 7. The bottom of the connecting plate 702 is provided with a connecting hole; the brake lever assembly 8 is a lever body structure and comprises a displacement lever 801; the bottom of the displacement rod 801 is fixedly connected with a limiting plate 802, the limiting plate is of a plate-shaped structure, the area of the longitudinal section of the limiting plate is larger than the diameter of the through hole of the connecting plate 702, and the top of the limiting plate is provided with a connecting rod corresponding to the connecting hole. The threaded sleeve 6 rotates and the screw assembly 7 rotates and moves transversely therewith under the action of the first thread. The connecting plate 702 comprises a central part, bent parts respectively extend from two sides of the central part, one end of each bent part, which is connected with the central part, is inclined counterclockwise by 60 degrees towards the central part, and one end, which is symmetrical to the connecting end, of each bent part extends to form a connecting part parallel to the central part, so that the whole structural strength of the connecting plate 702 is high, the service life is prolonged, and meanwhile, the bent parts are hollowed out for reducing weight; a through hole of the connecting plate 702 is formed in the center part and corresponds to an opening at the bottom of the

screw assembly

7, 4 mounting holes are uniformly formed in the periphery of the edge of the through hole, and mounting rods are inserted into the mounting holes to be fixed; the connecting part is used for being connected with other parts in the brake control system or being fixed after being connected through parts in the brake control system; the limiting plate 802 is used for preventing the displacement rod 801 from being separated from the working track, 4 connecting rods are uniformly arranged on the end face of the top of the limiting plate, and the limiting plate is correspondingly inserted into the mounting hole to be stable; after the displacement rod 801 is pushed to the brake rod assembly 7, the brake rod assembly 7 has no acting force, and then the brake rod assembly 7 is pushed by the displacement rod 801 to drive the screw rod assembly 7 to move rightwards.

Claims

1. A brake auxiliary device for a vehicle comprises a connector (1), a spring fixing sleeve (2), a compression spring (3), a nut (4), a large gear (5), a threaded sleeve (6), a screw assembly (7) and a brake rod assembly (8), and is characterized in that the spring fixing sleeve (2) is of a hollow structure and is sleeved on the brake rod assembly (8); the compression spring (3) is sleeved on the brake rod assembly (8), the bottom of the compression spring is abutted against the top of the screw assembly (7), and the top of the compression spring is abutted against the bottom of the spring fixing sleeve (2); the top of the brake rod component (8) is plugged into the screw component (7) from the bottom of the screw component, the top of the brake rod component penetrates out of the screw component (7) and penetrates through the spring fixing sleeve (2) to be fixedly connected with the bottom of the connector (1), and the bottom of the brake rod component (8) is limited at the bottom of the screw component (7); the screw rod component (7) extends into the screw sleeve (6) from the bottom of the screw sleeve and is in threaded connection with the inside of the screw sleeve (6); the bull gear (5) is sleeved on the threaded sleeve (6) and meshed with the threaded sleeve; the nut (4) is sleeved on the threaded sleeve (6) and is in threaded connection with the threaded sleeve (6), and the position of the nut (4) is far away from the screw component (7) relative to the position of the large gear (5).

2. The brake assist device for vehicle according to claim 1, wherein the large gear (5) is of a gear structure and is circular, the inner side wall of the large gear is provided with an internal spline (503), the outer side wall of the large gear is provided with a tooth pattern (501), and a hollow (502) is provided between the outer side and the inner side of the large gear.

3. The brake assist device for the vehicle according to claim 1 or 2, wherein the threaded sleeve (6) is of a sleeve structure, a first thread is formed inside the threaded sleeve, a second thread (601) and an external spline (602) are formed on the outer end surface of the threaded sleeve, the position of the second thread (601) is far away from the bottom of the threaded sleeve (6) relative to the position of the external spline (602), a base (603) is formed on the bottom of the threaded sleeve (6), the base (603) is of a circular ring structure, and the diameter of an inner ring of the base is correspondingly equal to the diameter of the threaded sleeve (6).

4. The brake assist device for a vehicle according to claim 3, wherein the diameter of the second thread (601) is smaller than the diameter of the external spline (602), and the diameter of the external spline (602) is smaller than the diameter of the base (603).

5. Brake assist device for vehicles according to claim 1, 2 or 4, characterized in that the screw assembly (7) is of a sleeve construction, comprising a screw (701); a third thread is arranged outside the screw rod (701), and a connecting plate (702) is fixedly connected to the bottom of the screw rod; the connecting plate (702) is of a plate-shaped structure, the end face of the middle part of the connecting plate is provided with a through hole, and the diameter of the through hole is equal to the outer diameter of the screw (701).

6. Brake assist device for vehicle according to claim 5, characterized in that the screw assembly (7) is of a sleeve construction comprising a screw (701); a third thread is arranged outside the screw rod (701), and a connecting plate (702) is fixedly connected to the bottom of the screw rod; the connecting plate (702) is of a plate-shaped structure, the end face of the middle part of the connecting plate is provided with a through hole, and the diameter of the through hole is equal to the outer diameter of the screw (701).

7. The brake assist device for a vehicle according to claim 1, 2, 4 or 6, wherein the connecting plate (702) has a connecting hole at the bottom; the brake lever assembly (8) is of a lever body structure and comprises a displacement lever (801); the bottom of the displacement rod (801) is fixedly connected with a limiting plate (802), the limiting plate is of a plate-shaped structure, the area of the longitudinal section of the limiting plate is larger than the diameter of the through hole of the connecting plate (702), and the top of the limiting plate is provided with a connecting rod corresponding to the connecting hole.

8. The brake assist device for a vehicle according to claim 3, wherein the connecting plate (702) has a connecting hole formed at a bottom thereof; the brake lever assembly (8) is of a lever body structure and comprises a displacement lever (801); the bottom of the displacement rod (801) is fixedly connected with a limiting plate (802), the limiting plate is of a plate-shaped structure, the area of the longitudinal section of the limiting plate is larger than the diameter of the through hole of the connecting plate (702), and the top of the limiting plate is provided with a connecting rod corresponding to the connecting hole.

9. The brake assist device for a vehicle according to claim 5, wherein the connecting plate (702) has a connecting hole formed at a bottom thereof; the brake lever assembly (8) is of a lever body structure and comprises a displacement lever (801); the bottom of the displacement rod (801) is fixedly connected with a limiting plate (802), the limiting plate is of a plate-shaped structure, the area of the longitudinal section of the limiting plate is larger than the diameter of the through hole of the connecting plate (702), and the top of the limiting plate is provided with a connecting rod corresponding to the connecting hole.