CN111412234A - An electronic brake/parking mechanism - Google Patents

Abstract

The present invention provides an electronic brake/parking mechanism applied to the technical field of auto parts, wherein the teeth of the motor runner (2) of the motor (1) of the electronic brake/parking mechanism and the lead screw runner The teeth of (3) are meshed and connected, the screw wheel (3) is fixedly connected with one end of the screw (4), the valve seat (5) is sleeved on the screw (4), the valve seat (5) and the screw (4) A ball (6) is arranged between ), the valve seat (5) is arranged as a movable structure, and the valve seat (5) is connected with the piston rod (8) of the hydraulic cylinder (7). The car mechanism has a simple structure. The ball screw is matched with the motor and the hydraulic cylinder, so that the output pressure port of the hydraulic cylinder is directly connected to the original hydraulic system of the car in parallel, and the electronic control of the caliper can be reliably realized. Integrated, high reliability and high precision.

Description

An electronic brake/parking mechanism

technical field

The invention belongs to the technical field of auto parts, and more particularly relates to an electronic brake/parking mechanism.

Background technique

At present, the electronic parking brake system generally adopts two types of wire traction type and integrated caliper. For the cable traction mechanism, the installation cost is low, but because the motor is used to drive the cable to achieve braking, it takes up a lot of space, which is not conducive to the overall structure layout, and the accuracy is not high, so it is not suitable for electronic systems. The integrated caliper type requires a brake caliper, a motor, a belt gear, etc., so the cost is high. Moreover, the integrated caliper type brake uses a motor to directly act on the screw through a reducer, and the screw pushes the brake piston axially through the bolt and nut mechanism. To achieve braking, bolts and nuts lose a lot of energy in the process of converting rotational motion into translational motion, which is likely to cause overheating of the braking system, and its axial movement accuracy is not easy to control, resulting in inaccurate braking force.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: in view of the deficiencies of the prior art, a simple structure is provided, and the output pressure port of the hydraulic cylinder is directly connected in parallel with the original hydraulic system of the automobile through the ball screw cooperating with the motor and the hydraulic cylinder, Reliably realize the electronic control of the caliper, and can realize the matching, integration of the whole vehicle, and the electronic brake/parking mechanism with high reliability.

To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

The invention is an electronic brake/parking mechanism, comprising a motor, the teeth of the motor wheel of the motor are meshed and connected with the teeth of the screw wheel, the screw wheel is fixedly connected to one end of the screw, and the screw is on the screw. The valve seat is sleeved, the ball is arranged between the valve seat and the lead screw, the valve seat is arranged as a movable structure, and the valve seat is connected with the piston rod of the hydraulic cylinder.

The electronic brake/parking mechanism also includes a reducer, the teeth of the motor runner of the motor are meshed with the reducer input runner of the reducer, and the teeth of the screw runner are connected to the reducer output of the reducer. Rotary wheel meshing connection.

The surface of the lead screw is provided with screw grooves arranged in a spiral shape, the valve seat is provided with a screw hole, and the inner wall of the screw hole is provided with a spiral valve seat groove.

A plurality of the balls are arranged, each ball part is located in the screw groove of the lead screw, and each ball part is located in the valve seat groove of the valve seat.

The lead screw runner of the electronic brake/parking mechanism is arranged vertically with the lead screw, and the center line of the lead screw is set to a structure that can coincide with the center point of the lead screw runner.

The hydraulic cylinder is fixedly arranged on the automobile, a piston is arranged in the hydraulic cylinder, the piston is connected with the piston rod, and the valve seat is fixedly connected with the piston rod.

The electronic brake/parking mechanism further includes a brake/parking caliper, and the hydraulic cylinder is connected with the caliper.

The motor is connected with a control part that can control the start-stop, forward and reverse rotation and speed adjustment of the motor, and the control part is also set to a structure capable of sending a parking/braking signal or a contact parking/braking signal to the motor. When the motor sends a parking/brake signal to control the rotation of the motor, the motor wheel of the motor is set to be able to drive the screw to rotate in one direction through the screw wheel to drive the valve seat to move axially in one direction; When the motor sends a parking/brake signal to control the rotation of the motor, the motor wheel of the motor is arranged to be able to drive the screw to rotate in another direction through the screw wheel to drive the valve seat to move axially in another direction.

When the lead screw drives the valve seat to move axially in one direction, the lead screw is set to be able to push the piston in the hydraulic cylinder to move in one direction, thereby driving the hydraulic oil in the hydraulic cylinder to push the caliper to move to realize the parking of the car. / Brake structure.

When the lead screw drives the valve seat to move axially in another direction, the lead screw is set to be able to pull the piston in the hydraulic cylinder to move in another direction, so that the hydraulic oil in the hydraulic cylinder no longer acts on the caliper, and the hydraulic cylinder The calipers are configured to release the car's park/brake when the hydraulic fluid of the caliper is no longer acting on the calipers.

Adopting the technical scheme of the present invention, the following beneficial effects can be obtained:

The electronic brake/parking mechanism of the present invention uses the motor as a power source to transmit power to the lead screw. When the lead screw rotates, it drives the valve seat to move axially relative to the lead screw, the valve seat outputs external force to the hydraulic cylinder, and the hydraulic pressure The hydraulic oil in the cylinder realizes hydraulic control, thereby driving the action of the caliper to realize the brake/parking control of the car or release the brake/parking. The cooperation of the lead screw and the valve seat can reliably and accurately realize the linear, continuous and stable change of the pressure value of the hydraulic pressure output end of the hydraulic cylinder. It is connected in parallel with the original caliper-controlled hydraulic system of the automobile to realize smooth braking/parking brake control. The original system cooperates effectively, reduces the cost, and greatly improves the versatility. The screw and the valve seat cooperate with the transmission, which has the characteristics of high transmission efficiency, high transmission precision, high-speed feed, micro-feed, high axial rigidity, and transmission reversibility, which can effectively meet the precise requirements of electronic braking. The motor drives the lead screw to rotate. As a transmission mechanism that converts rotary motion into linear motion, the lead screw has the characteristics of high efficiency, high precision, and reversible transmission. run. The above structure can be reliably connected and matched with the existing vehicle system, and has short response time and high precision during braking, which can make intelligent driving more comfortable and safe. Through the cooperation of the motor, the lead screw and the valve seat, the linear movement of the lead screw can be precisely and linearly displaced, and then the linear movement of the lead screw can be directly acted on the hydraulic cylinder, so as to output a certain pressure and act on the caliper. The device is connected in parallel with the existing hydraulic mechanism, and only the control of the motor can accurately realize the braking/parking function. The electronic brake/parking mechanism of the present invention has a simple structure. The ball screw is matched with the motor and the hydraulic cylinder, so that the output pressure port of the hydraulic cylinder is directly connected in parallel with the original hydraulic system of the automobile, and the electronic control of the caliper can be reliably realized. , can achieve the matching and integration of the whole vehicle, with high reliability and high precision.

Description of drawings

Below is a brief description of the contents expressed in the drawings of this specification and the symbols in the drawings:

Fig. 1 is the structural representation of the electronic brake/parking mechanism of the present invention;

2 is a schematic diagram of the matching structure of the valve seat and the lead screw of the electronic brake/parking mechanism according to the present invention;

The symbols in the drawings are: 1, motor; 2, motor wheel; 3, screw wheel; 4, screw; 5, valve seat; 6, ball; 7, hydraulic cylinder; 8, piston rod; 9, Reducer; 10, screw groove; 11, screw hole; 12, valve seat groove; 13, piston; 14, movable parts.

Detailed ways

In the following, referring to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention, such as the shape and structure of each component involved, the mutual position and connection relationship between each part, the function and working principle of each part, etc. will be further described. Details of:

As shown in Figures 1 and 2, the present invention is an electronic brake/parking mechanism, comprising a motor 1, and the teeth of the motor wheel 2 of the motor 1 are meshed and connected with the teeth of the screw wheel 3 , the lead screw runner 3 is fixedly connected with one end of the lead screw 4, a valve seat 5 is set on the lead screw 4, and a ball 6 is arranged between the valve seat 5 and the lead screw 4. The valve seat 5 is set as a movable structure, and the valve seat 5 Connected to the piston rod 8 of the hydraulic cylinder 7 . The above structure uses the motor as a power source to transmit power to the lead screw, and when the lead screw rotates, it drives the valve seat to move axially relative to the lead screw, the valve seat outputs external force to the hydraulic cylinder, and the hydraulic oil in the hydraulic cylinder realizes hydraulic control. , so as to drive the action of the caliper to realize the brake/parking control of the car or release the brake/parking. The cooperation of the lead screw and the valve seat can reliably and accurately realize the linear, continuous and stable change of the pressure value of the hydraulic pressure output end of the hydraulic cylinder. It is connected in parallel with the original caliper-controlled hydraulic system of the automobile to realize smooth braking/parking brake control. The original system cooperates effectively, reduces the cost, and greatly improves the versatility. The screw and the valve seat cooperate with the transmission, which has the characteristics of high transmission efficiency, high transmission precision, high-speed feed, micro-feed, high axial rigidity, and transmission reversibility, which can effectively meet the precise requirements of electronic braking. The motor drives the lead screw to rotate. As a transmission mechanism that converts rotary motion into linear motion, the lead screw has the characteristics of high efficiency, high precision, and reversible transmission. run. The above structure can be reliably connected and matched with the existing vehicle system, and has short response time and high precision during braking, which can make intelligent driving more comfortable and safe. Through the cooperation of the motor, the lead screw and the valve seat, the linear movement of the lead screw can be precisely and linearly displaced, and then the linear movement of the lead screw can be directly acted on the hydraulic cylinder, so as to output a certain pressure and act on the caliper. The device is connected in parallel with the existing hydraulic mechanism, and only the control of the motor can accurately realize the braking/parking function. The electronic brake/parking mechanism of the present invention has a simple structure. The ball screw is matched with the motor and the hydraulic cylinder, so that the output pressure port of the hydraulic cylinder is directly connected in parallel with the original hydraulic system of the automobile, and the electronic control of the caliper can be reliably realized. , It can achieve the matching and integration of the whole vehicle, and the reliability is high.

The electronic brake/parking mechanism also includes a reducer 9, the teeth of the motor wheel 2 of the motor 1 are meshed with the reducer input wheel of the reducer 9, and the teeth of the screw wheel 3 are connected with the speed reducer. The reducer output runner of gear 9 is meshed and connected. In the above structure, a reducer is provided between the motor and the lead screw. In this way, on the one hand, the speed change of the motor can be realized through the speed change of the reducer to meet the speed requirement when the lead screw rotates. Meet the performance requirements of the brake/parking system. The rotary motion of the motor facilitates the linear motion of the lead screw, and the lead screw and the valve seat cooperate reliably. It has the characteristics of high transmission efficiency, high transmission precision, high-speed feed, micro-feed, high axial rigidity, and transmission reversibility. So as to effectively meet the needs of automobile braking.

The surface of the screw 4 is provided with a screw groove 10 arranged in a spiral shape, the valve seat 5 is provided with a screw hole 11 , and the inner wall of the screw hole 11 is provided with a spiral valve seat groove 12 . In the above structure, the valve seat and the lead screw are movably connected. When the valve seat is always in a fixed state, when the lead screw rotates, the lead screw

There are multiple balls 6 , each ball 6 is partially located in the screw groove 10 of the screw 4 , and each ball 6 is partially located in the valve seat groove 12 of the valve seat 5 . In the above structure, the balls are arranged between the valve seat and the lead screw, so as to realize the rolling contact between the valve seat and the lead screw, and reduce wear. At the same time, it is ensured that the electric valve seat can move axially relative to the lead screw when the lead screw rotates. In this way, the rotating force of the motor is transmitted to the lead screw in turn, and then to the hydraulic cylinder to realize the control of the caliper.

The lead screw runner 3 of the electronic brake/parking mechanism is arranged perpendicular to the lead screw 4 , and the center line of the lead screw 4 is set to a structure that can coincide with the center point of the lead screw runner 3 . In the above structure, when the lead screw runner rotates, the lead screw is driven to rotate, so that the force of the rotational motion of the lead screw runner is transmitted to the lead screw and becomes the axial movement of the valve seat, thereby realizing the control of the hydraulic cylinder.

The hydraulic cylinder 7 is fixedly arranged on the automobile, a piston 13 is arranged in the hydraulic cylinder 7 , the piston 13 is connected with the piston rod 8 , and the valve seat 5 is fixedly connected with the piston rod 8 . The electronic brake/parking mechanism further includes a brake/parking caliper, and the hydraulic cylinder 7 is connected with the caliper. With the above structure, when the valve seat moves axially, the piston rod drives the piston to move axially to change the change of the oil cavity in the hydraulic cylinder, so that the hydraulic oil can act according to the needs, and the precise and efficient control of the caliper can be realized.

The motor 1 is connected with a control component that can control the start-stop, forward and reverse rotation and speed adjustment of the motor 1, and the control component is also configured to be able to send a parking/brake signal to the motor 1 or a structure to contact the parking/brake signal, When the control component sends a parking/brake signal to the motor 1 to control the rotation of the motor 1, the motor wheel 2 of the motor 1 is set to be able to drive the screw 4 to rotate in one direction through the screw wheel 3, thereby driving the valve seat 5 to a direction. The structure of axial movement in the direction; when the control part sends a release parking/brake signal to the motor 1 to control the rotation of the motor 1, the motor wheel 2 of the motor 1 is set to be able to drive the screw 4 to the other direction through the screw wheel 3 The structure is rotated to drive the valve seat 5 to move axially in another direction. When the screw 4 drives the valve seat 5 to move axially in one direction, the screw 4 is configured to push the piston 13 in the hydraulic cylinder 7 to move in one direction, thereby driving the hydraulic oil in the hydraulic cylinder 7 to push the caliper. Move the structure that realizes the parking/braking of the car. When the screw 4 drives the valve seat 5 to move axially in another direction, the screw 4 is set to be able to pull the piston 13 in the hydraulic cylinder 7 to move in another direction, so that the hydraulic oil in the hydraulic cylinder 7 no longer works. On the caliper, when the hydraulic oil of the hydraulic cylinder 7 no longer acts on the caliper, the caliper is set to a structure capable of releasing the parking/braking of the vehicle. In the above structure, the motor acts as a power source and is responsible for providing rotational power to the entire mechanism. The reducer is responsible for adjusting the speed of the motor to match the speed of the lead screw to meet the speed requirement of the axial movement control of the valve seat. The lead screw and the valve seat cooperate to convert the rotary motion of the lead screw runner into the axial linear motion of the valve seat. The hydraulic cylinder is responsible for converting the force applied by the axial linear motion of the valve seat to the piston rod into the reciprocating motion of the piston in the hydraulic cylinder, so that when the piston in the hydraulic cylinder moves axially in different directions, the caliper can be clamped. Tight or open control, so as to implement the car parking/brake control or release the car parking/brake, and the entire control process is precise and timely.

The electronic brake/parking mechanism of the present invention uses the motor as a power source to transmit power to the lead screw. When the lead screw rotates, it drives the valve seat to move axially relative to the lead screw, the valve seat outputs external force to the hydraulic cylinder, and the hydraulic pressure The hydraulic oil in the cylinder realizes hydraulic control, thereby driving the action of the caliper to realize the brake/parking control of the car or release the brake/parking. The cooperation of the lead screw and the valve seat can reliably and accurately realize the linear, continuous and stable change of the pressure value of the hydraulic pressure output end of the hydraulic cylinder. It is connected in parallel with the original caliper-controlled hydraulic system of the automobile to realize smooth braking/parking brake control. The original system cooperates effectively, reduces the cost, and greatly improves the versatility. The screw and the valve seat cooperate with the transmission, which has the characteristics of high transmission efficiency, high transmission precision, high-speed feed, micro-feed, high axial rigidity, and transmission reversibility, which can effectively meet the precise requirements of electronic braking. The motor drives the lead screw to rotate. As a transmission mechanism that converts rotary motion into linear motion, the lead screw has the characteristics of high efficiency, high precision, and reversible transmission. run. The above structure can be reliably connected and matched with the existing vehicle system, and has short response time and high precision during braking, which can make intelligent driving more comfortable and safe. Through the cooperation of the motor, the lead screw and the valve seat, the linear movement of the lead screw can be precisely and linearly displaced, and then the linear movement of the lead screw can be directly acted on the hydraulic cylinder, so as to output a certain pressure and act on the caliper. The device is connected in parallel with the existing hydraulic mechanism, and only the control of the motor can accurately realize the braking/parking function. The electronic brake/parking mechanism of the present invention has a simple structure. The ball screw is matched with the motor and the hydraulic cylinder, so that the output pressure port of the hydraulic cylinder is directly connected in parallel with the original hydraulic system of the automobile, and the electronic control of the caliper can be reliably realized. , can achieve the matching and integration of the whole vehicle, with high reliability and high precision.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned methods, as long as various improvements made by the method concept and technical solutions of the present invention are adopted, or the present invention is modified without improvement. If the concept and technical solutions of the invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims (10)

1. An electronic brake/park mechanism, characterized in that: including motor (1), the tooth portion of motor runner (2) of motor (1) be connected with the tooth portion meshing of lead screw runner (3), lead screw runner (3) and lead screw (4) one end fixed connection, suit disk seat (5) on lead screw (4), set up ball (6) between disk seat (5) and lead screw (4), disk seat (5) set up to the activity structure, disk seat (5) are connected with piston rod (8) of pneumatic cylinder (7).

2. The electronic brake/park mechanism of claim 1, wherein: the electronic brake/parking mechanism further comprises a mechanism speed reducer (9), a tooth part of a motor rotating wheel (2) of the motor (1) is meshed with a speed reducer input rotating wheel of the mechanism speed reducer (9) and is connected with a tooth part of a lead screw rotating wheel (3) in a meshed mode with a speed reducer output rotating wheel of the mechanism speed reducer (9).

3. The electronic brake/park mechanism according to claim 1 or 2, wherein: the surface of the screw rod (4) is provided with a screw rod groove (10) which is spirally arranged, the valve seat (5) is provided with a screw rod hole (11), and the inner wall of the screw rod hole (11) is provided with a spiral valve seat groove (12).

4. The electronic brake/park mechanism of claim 3, wherein: the balls (6) are arranged in a plurality, each ball (6) is partially positioned in a screw groove (10) of the screw (4), and each ball (6) is partially positioned in a valve seat groove (12) of the valve seat (5).

5. The electronic brake/park mechanism according to claim 1 or 2, wherein: the electronic brake/parking mechanism is characterized in that a lead screw rotating wheel (3) of the electronic brake/parking mechanism is perpendicular to a lead screw (4), and the center line of the lead screw (4) is of a structure capable of being overlapped with the center point of the lead screw rotating wheel (3).

6. The electronic brake/park mechanism according to claim 1 or 2, wherein: the hydraulic cylinder (7) is fixedly arranged on an automobile, a piston (13) is arranged in the hydraulic cylinder (7), the piston (13) is connected with a piston rod (8), and a valve seat (5) is fixedly connected with the piston rod (8).

7. The electronic brake/park mechanism according to claim 1 or 2, wherein: the electronic brake/parking mechanism further comprises brake/parking calipers, and the hydraulic cylinder (7) is connected with the calipers.

8. The electronic brake/park mechanism of claim 7, wherein: the control device comprises a motor (1), a control component, a motor rotating wheel (2) and a valve seat (5), wherein the motor (1) is connected with the control component capable of controlling the motor (1) to start and stop, rotate forwards and backwards and adjust the rotating speed, the control component is also arranged into a structure capable of sending a parking/braking execution signal or a contact parking/braking signal to the motor (1), and when the control component sends the parking/braking execution signal to the motor (1) to control the motor (1) to rotate, the motor rotating wheel (2) of the motor (1) is arranged into a structure capable of driving a screw rod (4) to rotate towards one direction through the screw rod rotating wheel (3) so as; when the control component sends a signal for releasing parking/braking to the motor (1) to control the motor (1) to rotate, the motor rotating wheel (2) of the motor (1) is set to be a structure which can drive the screw rod (4) to rotate towards the other direction through the screw rod rotating wheel (3) so as to drive the valve seat (5) to axially move towards the other direction.

9. The electronic brake/park mechanism of claim 8, wherein: when the lead screw (4) rotates towards one direction to drive the valve seat (5) to move axially towards one direction, the lead screw (4) is set to be capable of pushing the piston (13) in the hydraulic cylinder (7) to move towards one direction, so that hydraulic oil in the hydraulic cylinder (7) is driven to apply force to push the calipers to move to realize the structure of automobile parking/braking.

10. The electronic brake/park mechanism of claim 8, wherein: when the lead screw (4) rotates towards the other direction to drive the valve seat (5) to move axially towards the other direction, the lead screw (4) is set to be capable of pulling the piston (13) in the hydraulic cylinder (7) to move towards the other direction, so that hydraulic oil in the hydraulic cylinder (7) does not act on the caliper any more, and when the hydraulic oil of the hydraulic cylinder (7) does not act on the caliper any more, the caliper is set to be capable of releasing the parking/braking structure of the automobile.

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