CN211648878U - Self-locking electric cylinder device adopting link mechanism - Google Patents

Abstract

The utility model relates to a vehicle braking control system or its part technical field, in particular to adopt link mechanism from electronic jar device of locking-type, including the casing, with motor and the slip that the casing is connected set up in the inside piston assembly of casing still includes: a disk part which is rotatably arranged in the housing and is driven by the motor to rotate; one end of the connecting rod is hinged with the piston assembly, and the other end of the connecting rod is eccentrically and rotatably connected with the disc part; a rotational angle restricting element engaged with the disc portion for restricting a rotational angle range of the disc portion. The beneficial effects of the utility model reside in that: parking braking can be realized, a manual braking device is omitted, and the parking braking device is simple in structure, low in cost and convenient to arrange; and a planetary gear structure is adopted, so that the transmission ratio is increased, and larger brake pressure is generated.

Description

Self-locking electric cylinder device adopting link mechanism

Technical Field

The utility model relates to a vehicle braking control system or its part technical field, in particular to adopt link mechanism from electronic jar device of locking-type.

Background

The automobile brake system is closely related to the automobile driving safety. In a conventional hydraulic brake system for an automobile, a driver applies a braking pressure to wheel cylinders of brakes of respective wheels by pressing a brake pedal, thereby braking and decelerating the automobile. Intelligent automotive systems such as Advanced Driving Assistance Systems (ADAS) and Automatic Driving Systems (ADS) require that the braking system be capable of applying autonomous braking to the vehicle, i.e., applying braking to some or all of the wheels without depressing the brake pedal.

At present, most of brake systems capable of implementing autonomous braking adopt electric power assistance, and brake control devices such as a brake pedal are reserved. For the development of unmanned logistics distribution vehicles, this approach is not suitable since the brake operating device is no longer required. Besides the service brake, the automatic driving vehicles such as unmanned logistics distribution vehicles also need to be parked and braked. The existing various motor vehicles are mostly provided with two systems of a service braking system and a parking braking system, namely, the existing electric cylinder device can only realize service braking without parking braking function, and other parking mechanisms are required to be added on the basis of the existing braking electric cylinder for realizing the parking function of the vehicle, so that the structure and the corresponding control are relatively complex and the cost is relatively high. Certain reliability of practical application is also required for service braking and parking braking.

Therefore, how to design a brake device which has a simple structure, is reliable to use, has low cost and simultaneously meets the requirements of driving and parking braking is an urgent problem to be solved in an automatic driving system of a motor vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's defect, providing a simple structure, use reliably and can satisfy the electronic jar device of driving and parking braking needs simultaneously.

In order to achieve the above object, the utility model provides an adopt link mechanism from electronic jar device of locking-type, including the casing, with motor, cylinder body and the slip that the casing is connected set up in the inside piston assembly of cylinder body still includes: a disk part which is rotatably arranged in the housing and is driven by the motor to rotate; one end of the connecting rod is hinged with the piston assembly, and the other end of the connecting rod is eccentrically and rotatably connected with the disc part;

a rotational angle restricting element engaged with the disc portion for restricting a rotational angle range of the disc portion; the connecting rod is provided with an initial position and a self-locking position, and in the initial position, the rotary connection position of the connecting rod and the disc part is positioned on one side of a central connecting line of the hinged position of the connecting rod on the piston assembly and the rotary center of the disc part; and in the self-locking position, the connecting part of the connecting rod and the disc part is positioned on the other side of the central connecting line.

Furthermore, the rotation angle limiting element is a disc pin shaft which is matched with the disc part, an arc-shaped groove is formed in the disc part, one end of the disc pin shaft is movably inserted into the arc-shaped groove, and the other end of the disc pin shaft is fixedly connected to the shell.

Further, the rotation limiting element is a disc pin shaft vertically arranged on the surface of the disc part; the surface of the disc part is provided with an arc-shaped groove, one end of the disc pin shaft is movably inserted in the arc-shaped groove, and the other end of the disc pin shaft is fixedly connected to the corresponding position of the shell. The matching of the disc pin shaft and the arc-shaped groove can limit the rotation angle of the disc part.

In some embodiments, the motor is coupled to a planetary gear mechanism; in other embodiments, the motor cooperates with a worm gear mechanism.

In some embodiments, the present invention further comprises a rotating shaft and a planetary gear mechanism, wherein the disk portion is fixed with the rotating shaft and is rotatably disposed in the housing through the rotating shaft, and the motor drives the rotating shaft to rotate through the planetary gear mechanism; the planetary gear mechanism comprises a sun gear connected with an output shaft of the motor, a planet gear meshed with the periphery of the sun gear, a connecting pin shaft inserted in the center of the planet gear, a planet carrier sleeved on the connecting pin shaft and an inner gear ring sleeved on the periphery of the planet gear and meshed with the planet carrier; the shaft part is connected with the planet carrier through a flat key and is arranged in a synchronous rotating mode. The motor outputs torque to the sun gear, the torque is transmitted to the planet carrier through the planet gear, and the torque is finally transmitted to the rotating shaft through the flat key planet carrier. The axial direction of the output shaft of the motor is vertical to the sliding direction of the piston assembly; and the diameter of the disc portion is larger than the diameter of the shaft portion. Further, the planetary gear mechanism is arranged in the shell, the shell comprises a cover covered on the shell, and the edge of the inner gear ring is clamped between the shell and the motor; the shell comprises a cover covered on the shell in a sealing way, and one end of the disc pin shaft, which is far away from the rotating shaft, is fixedly connected to the inner wall of the cover; the rotating shaft is rotatably arranged on a shaft shoulder of the shell through a bearing. The casing with the junction of cylinder body is provided with the sealing washer, and the sealing washer is compressed tightly in composition surface department after the fastening and plays sealed effect. The end face of the bearing, which is close to the cover, is provided with a clamp spring, and the clamp spring is used for axially positioning the bearing and limiting the axial movement of the rotating shaft.

In other embodiments, the coupling to the output shaft of the motor is a drive shaft, the drive shaft is a worm, the disk portion is a worm wheel engaged with the drive shaft, and the drive shaft and the disk portion form a worm and gear mechanism. The motor drives the connecting rod and the piston assembly through a worm gear mechanism; the axial direction of the output shaft of the motor is parallel to the sliding direction of the piston assembly.

Further, the shell comprises a motor shell connected with the motor and a worm gear shell connected with the motor shell, and the worm gear shell is connected with the cylinder; the worm wheel is rotatably arranged in the worm wheel shell through a supporting shaft, and one end, far away from the worm wheel, of the disc pin shaft is fixedly connected to the side wall of the worm wheel shell.

Further, piston assembly including slide set up in the cylinder body and through piston round pin axle with connecting rod articulated piston, the piston is kept away from the terminal surface of motor reaches be provided with the elasticity piece that resets between the inside wall of cylinder body, the elasticity piece that resets through the spring holder that sets up on the piston terminal surface with the piston is connected. The straight line of the sliding direction of the piston and the connecting line of the centers are on the same straight line. When the elastic resetting piece is at an initial position, the elastic resetting piece is in a prepressing state; when in the self-locking position, the elastic reset piece is in a compressed state.

Furthermore, the disk part is coaxially and fixedly connected with the rotating shaft through a screw arranged on the axis of the disk part, the connecting rod is rotatably connected with the disk part through a connecting rod pin shaft, and the connecting rod is hinged with the piston through a piston pin shaft.

Furthermore, a compensation hole and a liquid supply hole are radially formed in the inner wall of the upper part of the cylinder body, and a liquid discharge hole is radially formed in the inner wall of the lower part of the cylinder body; the compensation hole and the liquid supply hole are connected with an oil can; the end face of the piston, which is far away from the motor, and the cylinder body form a first cavity, and the periphery of the piston and the cylinder body form a second cavity; the piston is close to be provided with first leather cup on the tip periphery of first cavity, the piston is located be provided with the second leather cup on the periphery in the second cavity. The liquid discharge hole is connected to a corresponding wheel brake on the automobile through a connecting pipeline. When the elastic reset piece is in a prepressing state, the first packing cup is positioned between the compensation hole and the liquid supply hole

When the piston is in the initial position, the connecting rod pin shaft is positioned above the central connecting line, the disc pin shaft abuts against the top end of the arc-shaped groove in the anticlockwise direction, the piston is positioned at the rightmost end in the cylinder body, the first leather cup is axially positioned between the compensation hole and the liquid supply hole, the first cavity is communicated with the compensation hole and the liquid discharge hole, and the elastic resetting piece is not acted by force; the first leather cup can realize the opening and closing of the compensation hole along with the movement of the piston.

When the self-locking position is realized, the connecting rod pin shaft is positioned below the central connecting line and is close to the central connecting line, the disc pin shaft is abutted against the top end of the arc-shaped groove in the clockwise direction, and the first cavity is only communicated with the liquid discharge hole.

Therefore, when in conventional braking, the motor output torque drives the disc part to rotate anticlockwise through the transmission assembly adopting the planetary gear so as to drive the connecting rod pin to approach to the axial center connecting line direction, and finally the piston is pushed to output braking pressure to realize braking; during parking braking, braking is achieved through a braking means in conventional braking, when the motor is powered off, the connecting rod shaft pin is located below the central connecting line, the lower portion of the arc-shaped groove of the disc portion is in contact with the disc pin shaft, braking pressure acts on the connecting rod through the piston, the disc portion continues to rotate anticlockwise, but the lower portion of the arc-shaped groove is blocked by the disc pin shaft, the disc portion is prevented from rotating anticlockwise, the position of the piston is kept unchanged, and the output pressure of the electric cylinder is kept to achieve parking braking.

The beneficial effects of the utility model reside in that:

1. the utility model omits a manual braking device, is suitable for the parking braking requirement of an unmanned logistics distribution vehicle or a common driving vehicle, and has simple structure, low cost and convenient arrangement;

2. the utility model directly drives the electric cylinder piston by the motor through the transmission device, thereby having short pressure building time and fast brake response;

3. the transmission device of the utility model adopts a planetary gear structure, which increases the transmission ratio and generates larger brake pressure;

4. the utility model discloses electronic jar device can realize the parking function, has further saved the cost more.

Drawings

Fig. 1 is a schematic diagram of a first embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along the line E-E in FIG. 1;

fig. 3 is a schematic diagram of a second embodiment of the present invention;

FIG. 4 is a rotated section view taken along the line E-E in FIG. 3;

fig. 5 is a schematic structural view of a cylinder body portion of the dual-chamber electric cylinder of the present invention.

In the figure: 101-motor, 102-connecting pin shaft, 103-sun gear, 104-inner gear ring, 105-planet gear, 106-planet carrier, 107-flat key, 108-bearing, 109-snap spring, 110-rotating shaft, 111-screw, 112-cover, 113-shell, 114-disc pin shaft, 116-connecting rod pin shaft, 117-connecting rod, 118-sealing ring, 119-piston pin shaft, 120-second leather cup, 121-piston, 122-first leather cup, 123-spring seat, 124-elastic reset piece, 125-cylinder body, 126-oilcan;

201-motor, 202-coupler, 203-left clamp spring, 204-left bearing, 205-motor shell, 206-worm, 207-right bearing, 208-right clamp spring, 209-oil seal cover, 210-disc pin, 211-worm wheel, 212-connecting rod pin, 213-connecting rod, 214-piston pin, 215-oil can, 216-second leather cup, 217-piston, 218-elastic reset piece, 219-spring seat, 220-first leather cup, 221-worm wheel shell, 222-left bearing and 223-right bearing;

a-a second cavity, B-a liquid supply hole, C-a compensation hole, D-a first cavity and E-a liquid discharge hole;

312-a first piston, 313-a third leather cup, 314-a connecting piece, 315-a liquid storage tank, 316-a first elastic piece, 317-an electric cylinder body, 318-a fourth leather cup, 319-a second piston, 320-a second elastic piece, 321-a limiting pin, 322-a limiting hole, 314 a-a cross bar, 314B-a partition plate, A1-a fifth cavity, B1-a first liquid supply hole, B2-a second liquid supply hole, C1-a first compensation hole, C2-a second compensation hole, D1-a third cavity, D2-a fourth cavity, E1-a first liquid discharge hole and E2-a second liquid discharge hole.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example one

As shown in fig. 1 and 2, a self-locking electric cylinder device using a link mechanism includes a motor 101 and a housing connected to the motor 101, and further includes: a rotating shaft 110 connected to the motor 101 through a planetary gear mechanism, a connecting rod 117 eccentrically and rotatably connected to a disk portion of the rotating shaft 110, and a piston assembly rotatably connected to the connecting rod 117.

The housing includes a housing 113 connected with the ring gear 104, and a cylinder 125 connected with the housing 113; the end of the housing 113 remote from the motor 101 is capped with a cover 112. In this embodiment, the housing 113 is vertically connected to the cylinder 125 in an "L" shape in the axial direction; and a sealing ring 118 is arranged at the joint, and after fastening, the sealing ring 118 is pressed at the joint surface for sealing. A compensation hole C and a liquid supply hole B are radially formed in the upper inner wall of the cylinder body 125, and a liquid discharge hole E is radially formed in the lower inner wall of the cylinder body 125; the compensation hole C and the liquid supply hole B are connected with an oil pot 126.

The planetary gear mechanism comprises a sun gear 103 connected with an output shaft of the motor 101, a planet gear 105 meshed with the periphery of the sun gear 103, a planet carrier 106 sleeved on a connecting pin shaft 102 at the center of the planet gear 105 and an inner gear ring 104 sleeved on the periphery of the planet gear 105 and meshed with the planet gear; the outer periphery of the ring gear 104 is connected to the motor 101 and the housing 113, respectively.

The end surface of the disk part connected on the rotating shaft 110, which is close to the cover 112 direction, and the direction far away from the piston assembly are provided with arc-shaped grooves; a disc pin shaft 114 vertical to the disc part is fixedly connected to the cover 112, and the disc pin shaft 114 is inserted into the arc-shaped groove. The engagement of the disk pins 114 with the arcuate slots limits the rotational angle of the disk portion. The shaft portion of the rotating shaft 110 is connected to the carrier 106 by a flat key, and is rotatably provided on a shoulder of the housing 113 by a pair of bearings 108 fitted around the outer periphery thereof. The end face of the bearing 108 near the cover 112 is provided with a snap spring 109, and the snap spring 109 is used for axial positioning of the bearing 108 and limiting the axial movement of the rotating shaft 110. The motor 101 outputs torque to the sun gear 103, and is transmitted to the planet carrier 106 through the planet gears 105, and finally the torque is transmitted to the rotating shaft 110 through the flat keys 107 by the planet carrier 106. In this embodiment, the arc-shaped groove is a groove formed on the end surface of the disk portion, and one end of the disk pin 114 is inserted into the groove and the other end is fixed to the cover 112; in other embodiments, the arc-shaped slot may be a through hole, and the fixed end of the disc pin 114 may be fixed to the shoulder of the housing 113 and penetrate through the through hole.

The piston assembly includes a piston 121 slidably disposed in a cylinder 125 and connected to the connecting rod 117, an elastic restoring member 124 disposed between an end surface of the piston 121 far away from the motor 101 and an inner side wall of the cylinder 125, and a first leather cup 122 disposed at an end of an outer periphery of the piston 121 close to the elastic restoring member 124. The elastic restoring member 124 is connected to the piston 121 through a spring seat 123 provided on the piston 121. In the present embodiment, the elastic restoring element 124 is a spring, and in other embodiments, the elastic restoring element 124 may be an elastic element such as a spring plate or other elements having a restoring function. The end surface of the piston 121 far away from the motor 101 and the cylinder 125 form a first cavity D communicated with a corresponding wheel brake through a liquid discharge hole E, and the periphery of the piston 121 and the cylinder 125 form a second cavity A; the piston 121 is provided with a second cup 120 on the outer circumference thereof in the second chamber a.

The disk portion is coaxially and fixedly connected with the rotating shaft 110 through a screw 111 arranged at the axis of the disk portion, the connecting rod 117 is fixedly connected with the disk portion through a connecting rod pin shaft 116, and the connecting rod 117 is rotatably connected with the piston 121 through a piston pin shaft 119. In this embodiment, the axes of the piston pin 119, the axis of the rotating shaft 110, and the axis of the disc pin 114 are all on the central connection line; in other embodiments, the positions of the disc pin 114 and the arc-shaped groove may be set at any position outside the range of motion of the connecting rod 117.

The utility model discloses an operating condition divide into service braking operating mode and auto-lock braking operating mode, and its theory of operation is respectively:

and (3) service braking condition:

as shown in fig. 2, a controller in the automobile receives a braking signal to drive the motor 101 to rotate, the motor 101 drives the sun gear 103 to rotate, so as to drive the planet gear 105 and the planet carrier 106 to rotate, the planet carrier 106 is connected with the rotating shaft 110 through the flat key 107, the rotating shaft 110 rotates simultaneously, as shown in fig. 1, along with the counterclockwise rotation of the disc part, the connecting rod 117 pushes the piston 121 to translate forwards until the first leather cup 122 seals the compensation hole C, and at this time, the connecting rod 117 continues to push the piston 121 to squeeze the brake fluid in the first cavity D, and the brake pressure is output from the fluid discharge hole E.

When the brake needs to be released, the driving motor 101 is powered off, and the piston 121 pushes the connecting rod 117 to rotate rightwards under the action of the brake pressure and the elastic resetting piece 124, so that the rotating shaft 110 rotates clockwise until the rotating shaft 110 returns to the initial position. In the initial state, the upper portion of the arc-shaped groove of the disk portion contacts the disk pin 114, the link pin 116 is located at the upper portion of the center line, and the spring force cannot push the rotating shaft 110 to rotate clockwise.

Self-locking working condition:

the controller receives the self-locking signal to drive the motor 101 to rotate, the motor 101 drives the transmission assembly to rotate, the rotating shaft 110 rotates anticlockwise, the lower part of the arc-shaped groove of the rotating disc part is in contact with the disc pin shaft 114, the connecting rod pin shaft 116 rotates to the lower part close to the middle connecting line, the motor 101 is powered off at the moment, the braking pressure can act on the connecting rod 117 through the piston 121, the rotating shaft 110 continues to rotate anticlockwise, but the lower part of the arc-shaped groove of the rotating disc part is blocked by the pin rotating shaft 114, the rotating shaft 110 is prevented from rotating anticlockwise, the output pressure of the electric cylinder is kept.

Example two

As shown in fig. 3 and 4, a self-locking electric cylinder device using a link mechanism includes a motor 201 and a housing connected to the motor 201, and further includes: a connecting rod 213 connected with the motor 201 through a worm gear mechanism, and a piston assembly rotatably connected with the connecting rod 213.

The shell comprises a motor shell 205 connected with the motor 201, a worm gear shell 221 connected with the motor shell 205 and a cylinder 224 connected with the worm gear shell 221; the upper inner wall of the cylinder 224 is radially provided with a compensation hole C and a liquid supply hole B, and the lower inner wall of the cylinder 224 is radially provided with a liquid discharge hole E; the compensation hole C and the liquid supply hole B are connected with an oil pot 215.

The motor 201 drives 213 connecting rod and piston assembly through worm gear mechanism; the worm gear mechanism comprises a disk part and a driving shaft meshed with the disk part; the disk part is a worm wheel 211, and the driving shaft is a worm 206 meshed with the worm wheel 211; the axial direction of the output shaft of the motor 201 is parallel to the sliding direction of the piston assembly. In this embodiment, the worm wheel 211 is rotatably disposed in the worm wheel housing 221 through a supporting shaft 222 and a pair of bearings 223, an arc-shaped groove is formed on the surface of the worm wheel 211, one end of the disc pin 210 is inserted into the arc-shaped groove, and the other end of the disc pin 210 is fixedly connected to the worm wheel housing 221; the engagement of the disc pin 210 with the arcuate slot limits the rotational angle of the worm gear 211. In this embodiment, the arc-shaped groove is a through hole formed along the axial direction; in other embodiments, the arc-shaped groove can be a groove formed on the end surface of the disk portion.

The motor 201 is connected with the worm 206 through the coupler 202, two ends of the worm wheel 206 are respectively rotatably arranged at the joint of the motor shell 205 and the worm wheel shell 221 through the left bearing 204 and the right bearing 207, two ends of the two bearings are respectively provided with the left snap spring 203 and the right snap spring 208, and the right side of the right snap spring 208 is provided with the oil seal cover 209. The axis of the worm 206 is perpendicular to the axis of the support shaft 222. The output torque of the motor 201 drives the worm 205 to rotate, and then drives the worm wheel 211 meshed with the worm 205.

The piston assembly comprises a piston 217 slidably disposed in a cylinder 224 and connected to the connecting rod 113, an elastic restoring member 218 disposed between an end surface of the piston 217 far away from the motor 201 and an inner side wall of the cylinder 224, and a first leather cup 220 disposed at an end of an outer periphery of the piston 217 close to the elastic restoring member 218. The elastic restoring member 218 is connected to the piston 217 through a spring seat 219 provided on the piston 217. In the embodiment, the elastic restoring member 218 is a spring, and in other embodiments, the elastic restoring member 218 may be an elastic member such as a spring plate or other elements having a restoring function. The end surface of the piston 217 far away from the motor 201 and the cylinder 224 form a first cavity D communicated with a corresponding wheel brake through a liquid discharge hole E, and the periphery of the piston 217 and the cylinder 224 form a second cavity A; the piston 217 is further provided with a second cup 216 on the outer periphery thereof in the second chamber a.

The connecting rod 213 is eccentrically and rotatably connected to the disk portion by a connecting rod pin 212, and the connecting rod 213 is rotatably connected to the piston 217 by a piston pin 214. In the embodiment, the axes of the piston pin shaft 214, the supporting shaft 222 and the disc pin shaft 210 are all on a central connection line; in other embodiments, the positions of the disc pins 210 and the arc-shaped grooves may be set at any position outside the range of motion of the connecting rods 213.

The utility model discloses an operating condition divide into service braking operating mode and auto-lock braking operating mode, and its theory of operation is respectively:

and (3) service braking condition:

as shown in fig. 3, a controller in the automobile receives a braking signal to drive a motor 201 to rotate, the motor 201 drives a worm 206 to rotate, so as to drive a worm wheel 211 to rotate anticlockwise, a connecting rod 213 is fixed on the worm wheel 211 through a connecting rod pin shaft 212, the connecting rod 213 moves along with the worm wheel 211, so that the connecting rod 213 pushes a piston 217 to translate forwards until a first leather cup 220 seals a compensation hole C, and at the moment, the connecting rod 213 continues to push the piston 217 to extrude brake fluid in a first cavity D, and brake pressure is output from a drain hole E.

When the brake needs to be released, the driving motor 201 is powered off, and under the action of the brake pressure and the elastic reset piece 218, the piston 217 pushes the connecting rod 213 to rotate rightwards, and the worm wheel 211 rotates clockwise until the worm wheel 211 returns to the initial position. In the initial state, the upper part of the arc-shaped groove of the worm wheel 211 is in contact with the disc pin shaft 210, the connecting rod pin shaft 212 is arranged at the upper part of the central connecting line, and the spring force cannot push the disc part to rotate clockwise continuously.

Self-locking working condition:

the controller receives the self-locking signal to drive the motor 201 to rotate, the motor 201 drives the worm 206 to rotate, the worm wheel 211 rotates anticlockwise, the lower part of the arc-shaped groove of the worm wheel 211 is in contact with the disc pin shaft 210, the connecting rod pin shaft 212 rotates to the lower part of the central connecting line, the motor 202 is powered off at the moment, the braking pressure can act on the connecting rod 213 through the piston 217, the worm wheel 211 continues to rotate anticlockwise, but the lower part of the arc-shaped groove of the worm wheel 211 is blocked by the disc pin shaft 210 to prevent the disc part from rotating anticlockwise, so that the position of the piston 217 is kept unchanged, and the. And realizing parking braking.

EXAMPLE III

The electric cylinder in the first and second embodiments may also be configured as a dual-chamber electric cylinder in the present embodiment; the cylinder 217 of the dual-chamber electric cylinder is partially shown in fig. 5, and the other parts are the same as the first embodiment and the second embodiment, that is, the cylinder parts in the first embodiment and the second embodiment can be replaced by the dual-chamber electric cylinder in the present embodiment.

As shown in fig. 5, the electric cylinder in the present embodiment is a dual chamber electric cylinder. A piston assembly is slidably arranged in the electric cylinder 317, the piston assembly comprises a first piston 312 and a second piston 319 which are arranged along the sliding direction of the piston assembly, and a connecting piece 314 for connecting the first piston 312 and the second piston 319, a third cavity D1 is formed between the first piston 312 and the inner wall of the electric cylinder 317 and the connecting piece 314, and a fourth cavity D2 is formed between the second piston 319 and the inner wall of the electric cylinder 317.

Specifically, a first elastic member 316 and a second elastic member 320 are arranged in the electric cylinder 317, the first elastic member 316 is arranged between the connecting member 314 and the first piston 312, the second elastic member 320 is arranged between the electric cylinder 317 and the second piston 319, and the first piston 312 is slidably connected with the connecting member 314; the first piston 312 and the inner wall of the electric cylinder block 317 form a third chamber a1, and the connection member 314 includes a partition 314b for separating the third chamber D1 and the fourth chamber D2, and a cross bar 314a extending outward along both sides of the partition 314b and connected to the first piston 312 and the second piston 319.

The size of the partition 314b should be adapted to the size of the electric cylinder 317, i.e. oil cannot pass through, and in this embodiment, a cup is also added to the partition 314 b. The cross bar 314a penetrates the partition 314b and has one end screwed to the second piston 319 and the other end slidably coupled to the first piston 312.

The working principle after the structure is adopted is as follows: under the action of the motor, the first piston 312 is subjected to a leftward force, and due to the existence of the first elastic member 316 and the second elastic member 320, the pressures on the first elastic member 316 and the second elastic member 320 are always in an equilibrium state. That is, when the first elastic element 316 and the second elastic element 320 are applied with a force to move the piston assembly to the left at the same time, the first elastic element 316 is compressed again, the reaction force is increased, and at this time, the second elastic element 320 is compressed.

In this embodiment, the elastic coefficient of the first elastic member 316 is greater than the elastic coefficient of the second elastic member 320. Since the elastic coefficient of the first elastic member 316 is greater than that of the second elastic member 320, in the initial stage, the first piston 312 and the second piston 319 move together to the left under the action of the force and compress the second elastic member 320, and the first elastic member 316 is not further compressed under the action of the force; in the compression process of the second elastic element 320, the elastic force thereof will gradually increase until being greater than the force required by the deformation of the first elastic element 316, at this time, the first elastic element 316 will be compressed, and the above operation will continue to be continued, so that the first elastic element 316 and the second elastic element 320 are always in a balanced state, and the pressure establishment to the third cavity D1 and the fourth cavity D2 is realized.

In this embodiment, the first piston 312 is provided with a limit pin 321, the cross bar 314a is provided with a limit hole 322 engaged with the limit pin 321, and both the limit pin 321 and the limit hole 322 are disposed along the horizontal direction, i.e., along the sliding direction of the piston assembly. The first piston 312 is slidably coupled to the cross bar 314a via a limit pin 321 and a limit hole 322. When the force compressing the first elastic element 316 is smaller than the force compressing the second elastic element 320, the stopper pin 321 is driven by the first piston 313 to move leftward along the stopper hole 322, and the second piston 319 is not moved; when the force compressing the first elastic member 316 is smaller than the force compressing the second elastic member 320, the entire piston assembly moves leftward at the same time. The first piston 312 is provided with a third cup 313, and the second piston 319 is provided with a fourth cup 318.

The electric cylinder body 317 is provided with: the first compensation hole C1 is communicated with the liquid storage tank 315 and the third cavity D1, the first liquid supply hole B1 is communicated with the liquid storage tank 315 and the third cavity A1, the first liquid discharge hole E1 is communicated with the third cavity D1, the second compensation hole C2 is communicated with the liquid storage tank 315 and the fourth cavity D2, the second liquid supply hole B2 is communicated with the liquid storage tank 315, and the second liquid discharge hole E2 is communicated with the fourth cavity D2.

When the first elastic member 316 is in a pre-compressed state, the third packing cup 313 is located between the first compensation hole C1 and the first fluid supply hole B1, and when the second elastic member 320 is in a pre-compressed state, the fourth packing cup 318 is located between the second compensation hole C2 and the second fluid supply hole B2.

The leather cup can realize the opening and closing of the corresponding compensation hole through the movement along with the piston. The pre-pressing state is an initial state when the elastic element is not acted by external force and is positioned according to the position of the elastic element.

As shown in fig. 5, the working principle of this embodiment is that under the action of the motor, the first piston 312 will be subjected to a force to the left, and since the elastic coefficient of the first elastic member 316 is greater than that of the second elastic member 320, in the initial stage, the first piston 313 and the second piston 319 will both move together to the left under the action of the force and compress the second elastic member 320, and the first elastic member 316 will not be subjected to the force; during the compression process of the second elastic element 320, the elastic force thereof will gradually increase until being greater than the force required by the deformation of the first elastic element 316, at which time the first elastic element 316 will be compressed, and the above operation will continue to be continued, so that the first elastic element 316 and the second elastic element 320 are always in a balanced state. After the leather cup blocks the compensation hole, high pressure is built in the third cavity D1 and the fourth cavity D2, and oil is discharged through the first liquid discharge hole E1 and the second liquid discharge hole E2 to brake the automobile.

In the present embodiment, the first piston 312 is equivalent to the piston 121 in the first embodiment and the piston 217 in the second embodiment, that is, the piston 312 in the present embodiment is hinged to the connecting rod 117 in the first embodiment, and is hinged to the connecting rod 213 in the second embodiment, and is driven by the corresponding connecting rod to move axially.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. The utility model provides an adopt link mechanism's electronic jar device of self-locking type, including the casing, with motor, cylinder body and the slip that the casing is connected set up in the inside piston assembly of cylinder body, its characterized in that still includes:

a disk part which is rotatably arranged in the housing and is driven by the motor to rotate;

one end of the connecting rod is hinged with the piston assembly, and the other end of the connecting rod is eccentrically and rotatably connected with the disc part;

a rotational angle restricting element engaged with the disc portion for restricting a rotational angle range of the disc portion; the connecting rod is provided with an initial position and a self-locking position, and in the initial position, the rotary connection position of the connecting rod and the disc part is positioned on one side of a central connecting line of the hinged position of the connecting rod on the piston assembly and the rotary center of the disc part; and in the self-locking position, the connecting part of the connecting rod and the disc part is positioned on the other side of the central connecting line.

2. The self-locking electric cylinder device with the link mechanism according to claim 1, wherein the rotation angle limiting element is a disc pin shaft disposed in cooperation with the disc portion, the disc portion is provided with an arc-shaped groove, one end of the disc pin shaft is movably inserted into the arc-shaped groove, and the other end thereof is fixedly connected to the housing.

3. The self-locking electric cylinder device with the link mechanism according to claim 2, wherein the disc pin abuts against one end side wall of the arc-shaped groove in an initial position, and abuts against the other end side wall of the arc-shaped groove in a self-locking position.

4. The self-locking electric cylinder device with the link mechanism according to claim 2, further comprising a rotating shaft and a planetary gear mechanism, wherein the disk portion is fixed to the rotating shaft and is rotatably disposed in the housing through the rotating shaft, and the motor drives the rotating shaft to rotate through the planetary gear mechanism; the planetary gear mechanism comprises a sun gear, a planet carrier and an inner gear ring which are connected with an output shaft of the motor, and the inner gear ring is fixedly arranged on the shell; the rotating shaft is connected with the planet carrier and is arranged in a synchronous rotating mode, and the axial direction of the output shaft of the motor is perpendicular to the sliding direction of the piston assembly.

5. The self-locking electric cylinder device with the link mechanism according to claim 4, wherein the planetary gear mechanism is disposed in the housing, the housing includes a cover covering thereon, and one end of the disc pin away from the disc portion is fixedly connected to an inner wall of the cover; the rotating shaft is rotatably arranged in the shell through a bearing.

6. The self-locking electric cylinder device using a link mechanism according to claim 5, wherein the ring gear and the motor are fixed to the housing, and an edge of the ring gear is clamped between the housing and the motor.

7. The self-locking electric cylinder device with the link mechanism according to claim 2, further comprising a driving shaft coupled to an output shaft of the motor, wherein the driving shaft is a worm, the disk portion is a worm wheel engaged with the driving shaft, and the driving shaft and the disk portion constitute a worm and gear mechanism.

8. The self-locking electric cylinder device using a linkage mechanism according to claim 7, wherein the housing comprises a motor housing connected to the motor, a worm gear housing connected to the motor housing, the worm gear housing being connected to the cylinder block; the worm wheel is rotatably arranged in the worm wheel shell through a supporting shaft.

9. The self-locking electric cylinder device with the connecting rod mechanism according to any one of claims 1 to 8, wherein the piston assembly comprises a piston slidably disposed in the cylinder and hinged to the connecting rod by a piston pin; the cylinder body is provided with a compensation hole, a liquid supply hole and a liquid discharge hole; the compensation hole and the liquid supply hole are connected with an oil can; the end face of the piston, which is far away from the motor, and the cylinder body form a first cavity, and the periphery of the piston and the cylinder body form a second cavity; a first leather cup and a second leather cup are arranged on the periphery of the piston, which is close to the first cavity, and the second cavity is positioned between the first leather cup and the second leather cup; the straight line of the sliding direction of the piston and the connecting line of the centers are on the same straight line.

10. The self-locking electric cylinder device using a connecting rod mechanism according to claim 9, further comprising an elastic restoring member disposed between the inner wall of the housing and the piston; when the elastic reset piece is in an initial position, the elastic reset piece is in a prepressing state, and the first leather cup is positioned between the compensation hole and the liquid supply hole; when in the self-locking position, the elastic reset piece is in a compressed state.

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