CN102039927A - Electric auxiliary steering module - Google Patents

Abstract

The invention relates to an electric auxiliary steering module comprising a speed reducer, a motor, a torque sensor and a controller, wherein the speed reducer comprises a shell, a sun gear, a planetary gear set, a ring gear, a large helical gear and a drive gear shaft; the planetary gear set comprises a small helical gear and a plurality of planetary gears which are alternately and movably inserted into the small helical gear, the ring gear is sleeved and meshed with the planetary gears, each planetary gear is meshed with the sun gear and is driven by the sun gear to rotate the small helical gear, the small helical gear is meshed with the large helical gear, the drive gear shaft is axially inserted into the large helical gear and is driven by the large helical gear to steer a meshed automotive steering machine in an auxiliary mode.

Description

Electronic assisted diversion module

Technical field

The present invention is a kind of electronic assisted diversion module, especially about a kind of electric assistant steering device that is used in the modular high mechanical efficiency on the automobile.

Background technology

General electronic auxiliary steering mechanism is the foundation of being exerted oneself as servo-motor by the speed of a motor vehicle and driver's outputting torsion, and the strength when providing the driver to turn to is auxiliary.Present known being used in conjunction with the steering shaft of tracker actions such as automobile or the electric assistant steering device of tooth bar, all need be and carry out single design according to different automobile types, characteristic demand, therefore need very long design time, not only ageing not good, and design cost is very high.

As shown in Figure 9, auxiliary steering mechanism (70) for a kind of existing gear pattern (pinion type), it is the reductor (72) by worm and wormwheel mainly, the assisted diversion power of one assisted diversion motor is passed to the steering box of automobile, yet this type of auxiliary steering mechanism has following shortcoming:

1. the design time-histories is longer: existing auxiliary steering mechanism (70) must be designed and developed according to vehicle needs, so design time-histories and can elongate, and the related die of designing and developing use also needs customized according to individual product.

2. mechanical efficiency is low: the reductor of located by prior art (72) adopts the type of drive of worm screw, worm gear, and it is about 85% that its mechanical efficiency can only reach, and relatively low mechanical efficiency is represented power consumption, oil consumption and high use cost.

3. can't keep in repair fast: when the auxiliary steering mechanism of commonly using (70) has maintenance or replacement in case of necessity, need disassemble whole auxiliary steering mechanism (70), so, after finishing maintenance, then must be again for automobile carry out the four-wheel positioning correcting, maintenance process is extremely constant.

Summary of the invention

Design technical matterss such as time-histories is long, mechanical efficiency is low, can't keep in repair fast in order to solve the aforementioned existing auxiliary mechanism that turns to, and then cause design cost high, use problems such as inconvenience and inconvenient maintenance, the present invention is designed to independently detachable modular construction onboard with assisted diversion motor, reductor and torsion torque sensor, aforementioned each parts all can be replaced separately and do not influence other mechanism, reach promote the maintenance convenience, design is simple and easy and elevating gear efficient etc. solves the goal of the invention of located by prior art shortcomings.

Cooperate to solve aforesaid technical matters and goal of the invention, the invention provides a kind of electronic assisted diversion module, it includes:

One reductor, it comprises a housing, one sun gear, one planet gear cluster, one Internal gear, an one king bolt gear and a driving gearshaft, wherein this compound planet gear comprises a small helical gear and interval and the movable a plurality of planetary wheels that are inserted in this small helical gear, each planetary wheel and the engagement of this sun gear, and be subjected to the transmission of this sun gear and rotate this small helical gear, this Internal gear is sheathed and be engaged in each planetary wheel, this small helical gear and this king bolt gear mesh, this small helical gear and this king bolt gear are a variable speed relationship, this driving gearshaft axially plugs secure bond in this king bolt gear again, on it, following two ends are a Steering gear and the steering box in order to be incorporated into an automobile respectively, this driving gearshaft and the engagement of this steering box;

One motor is incorporated on this housing with connecting element, and is connected with this sun gear is coaxial;

One torsion torque sensor is incorporated on this housing with connecting element, and is sheathed on this driving gearshaft, and it is in order to respond to the torsion that this driving gearshaft is driven by this Steering gear; And

One electrically connects the controller of its outputting torsion of this motor of control break according to this torsion with this motor and this torsion torque sensor.Thus, the present invention has following advantage:

1. the degree of modularity height of each assembly of the present invention can greatly reduce the exploitation time-histories of assistant steering device.

2. the present invention utilizes the compound planet gear transmission, and greatly elevating gear driving efficiency, and then the saving energy, saving are used oil and reduced use cost.

3. each module of the present invention can independently be dismantled, and needn't dismantle with steering box during maintenance, therefore after substituting New Parent or independent maintenance, need not carry out Four wheel alignment, therefore can reach the technology effect of quick maintenance.

Description of drawings

Fig. 1 is the system architecture scheme drawing of the embodiment of the invention.

Fig. 2 is the use combination stereogram of the electronic assisted diversion module of the embodiment of the invention.

The block diagram of the electronic assisted diversion module of Fig. 3 embodiment of the invention.

Fig. 4 is the partial exploded view of the electronic assisted diversion module of the embodiment of the invention.

Fig. 5 A is the block diagram of embodiment of the invention compound planet gear.

Fig. 5 B is the exploded drawings of embodiment of the invention compound planet gear.

Fig. 6 is the part sectional view of the electronic assisted diversion module of the embodiment of the invention.

Fig. 7 A is the block diagram that is used for the automobile steering device that combines with electronic assisted diversion module of the present invention.

Fig. 7 B is the partial exploded view that is used for the automobile steering device that combines with electronic assisted diversion module of the present invention.

The partial exploded view that Fig. 8 A disassembles on automobile steering device when maintain and replace for the electronic assisted diversion module of the present invention.

Fig. 8 B disassembles the partial exploded view of motor when maintain and replace for the electronic assisted diversion module of the present invention.

Fig. 8 C disassembles the partial exploded view of torsion torque sensor when maintain and replace for the electronic assisted diversion module of the present invention.

Fig. 9 is the part sectional view of existing auxiliary steering mechanism.

In the accompanying drawing, the list of parts of each label representative is as follows:

(10) electronic assisted diversion module

(111) base

(112) loam cake

(12) motor

(121) sun gear

(14) reductor

(142) compound planet gear

(1422) small helical gear

(1423) rotating shaft

(1424) planetary wheel

(1425) bearing

(144) Internal gear

(146) king bolt gear

(16) driving gearshaft

(162) lower end

(164) upper end

(18) torsion torque sensor

(20) controller

(22) control unit

(24) vehicle condition sensing module

(26) speed of a motor vehicle signal input interface

(51) steering box

(511) tooth bar

(512) shell

(513) joining base

(514) engagement adjustment group

(5141) adjustment group pedestal

(5142) lining

(5144) spring

(5146) adjustable bolt

(53) Steering gear

(70) steering swivel system

(72) reductor

The specific embodiment

Please refer to Fig. 1 to 4, it is the preferred embodiment use scheme drawing of electronic assisted diversion module of the present invention, and it comprises a reductor (14), a motor (12), a torsion torque sensor (18) and a controller (20).

This reductor (14) includes a housing, a sun gear (121), a planet gear cluster (142), an Internal gear (144), a king bolt gear (146) and a driving gearshaft (16), this housing can be fixed in the car body of an automobile, or secure bond is in a steering box (51) of this automobile, and the loam cake (112) that this housing can comprise a base (111) and be incorporated into this base (111) combines.

Please refer to Fig. 5 A again, 5B and Fig. 6, this sun gear (121) is coaxial to be connected on the motor (12), and be subjected to motor (12) rotation that drives, this compound planet gear (142) includes a plurality of planetary wheels (1424) that a small helical gear (1422) and interval and activity are inserted in this small helical gear (1422), wherein, each planetary wheel (1424) combines with this small helical gear (1422), can utilize a rotating shaft (1423) and a bearing (1425) axially to plug and run through cooresponding this planetary wheel (1424) afterwards, this rotating shaft (1423) is located on this small helical gear (1422) rotationally, each planetary wheel (1424) meshes with this sun gear (121) again, and drive by this sun gear (121), drive this small helical gear (1422) and rotate.

This Internal gear (144) places in this base (111) and shift sleeve is located at each planetary wheel (1424) periphery, it also is used to define the revolution ratio of this small helical gear (1422) and this sun gear (121) except that the rotary state that is used for firm each planetary wheel (1424).

The outer ring surface engagement of this king bolt gear (146) and this small helical gear (1422) makes and accepts this planetary wheel (1424) between this king bolt gear (146) and order about rotation.At this, this king bolt gear (146) forms a variable speed relationship with the gear of this small helical gear (1422) than relation, wherein, this variable speed relationship can be selected different variable speed relationship according to the automobile of different size requirement, for example, gear ratio between this king bolt gear (146) and this small helical gear (1422) can be 2～2.5, allows the designer adjust gear than promptly applicable to different caravans according to demand, reaches simplified design thus, reduces the technique effect that designs with manufacturing cost.

The axle center anchor shaft of this king bolt gear (146) is in conjunction with this driving gearshaft (16), one lower end (162) of this driving gearshaft (16) passes this housing in the part respectively with a upper end (164), wherein, one tooth bar (511) engagement of the steering box (51) of this lower end (162) and this automobile, this upper end (164) then combines with a Steering gear (53) axial restraint of this automobile, as shown in Figure 1.Wherein, the transmission gear shift of this reductor (14) relation, can be as described in the following formula:

φ1+(N3-1*φ3)-(N3-1+1)φ2＝0；

φ 1 is the input angular velocity of this sun gear (121);

φ 3 is the cireular frequency of this Internal gear (144) (present embodiment is 0, and Ring gear is fixed);

N3-1=T3/T1 (ratio of number of teeth), wherein, T1 is the number of teeth of this sun gear (121), T3 is the number of teeth of this Internal gear (144); And

φ 2 is an output angle speed.

This motor (12) is installed on the housing with connecting elements such as bolts, one turning cylinder of this motor (12) is rotatable to be plugged in this housing, the turning cylinder of this motor (12) of present embodiment is run through by the lower surface of this base (111) and is inserted in this base (111), and with this base (111) secure bond, wherein, this sun gear (121) fixed cover is located on the turning cylinder of motor (12).

For illustrating further the variable speed relationship of aforementioned this motor (12) to this driving gearshaft (16), please refer to Fig. 6, if this compound planet gear (142) one for the first time reduction ratio be 1/10, and this small helical gear (1422) and this king bolt gear (146) one for the second time reduction ratio be 1/2, it is 1/20 that this motor (12) is closed to the deceleration of this driving gearshaft (16).As previously mentioned, because the tooth of the large and small helical wheel (146,1422) of present embodiment can be adjusted than relation, formed therebetween variable speed relationship also can change thereupon.If the ratio of number of teeth of this large and small helical wheel (146,1422) is 2～2.5 times, can make the deceleration pass of this motor (12) and this driving gearshaft (16) is between 1/20～1/25, so concern the automobile of specification demand applicable to various different decelerations, reach the technique effect of aforementioned simplified design cycle.

This torsion torque sensor (18) is sheathed on the outer surface of this driving gearshaft (16) with connecting element secure bond such as bolts in this housing, the torsion when rotated by this Steering gear (53) in order to respond to this driving gearshaft (16).The pattern of this torsion torque sensor (18) does not limit, and it can be the inductor of electronics or magnetic field formula, perhaps for including the inductor of torsion bar.This torsion torque sensor (18) fixed cover of present embodiment is located at this upper end (164) that this driving gearshaft (16) passes this loam cake (112), it responds to the torsion that this automobile is driven therefore indirect this Steering gear (53) that drives of twisting bearing circle and this upper end (164) generation, and this torsion torque sensor (18) is sent to this controller (20) with sensing result.

Please refer to Fig. 1, this controller (20) electrically connects with motor, and can with this housing with connecting element secure bond such as bolts, a vehicle condition sensing module (24) and a speed of a motor vehicle signal input interface (26) that it comprises a control unit (22) and electrically connects with this control unit (22) respectively, wherein, this vehicle condition sensing module (24) can comprise the various electronic induction modules that are used to monitor running condition of automobile, for example, the state of blowing out that this vehicle condition sensing module (24) can the sensing automobile (by tire pressure detector induction), slipping state (by ABS braking system induction slipping state), auto against sensor (the actuator induction automobile by safety air bag be hit state) ... wait signal.This vehicle condition sensing module (24) exports the induction result relevant with driving states to this control unit (22).The road speed of this speed of a motor vehicle signal input interface (26) induction automobile, it will be responded to the result and export this control unit (22) to.

This control unit (22) electrically connects with this torsion torque sensor (18) and this motor (12), its induction result according to this torsion torque sensor (18) and this vehicle condition sensing module (24) and this speed of a motor vehicle signal input interface (26) gives after the computing, the turning cylinder rotating speed and the torsion of this motor of control break (12), assisted diversion thus.Casehistory it, this control unit (22) learns that according to the induction of this torsion torque sensor (18) driving of this automobile just desires to turn at the driving direction dish, at this moment, this control unit (22) cooperates the induction result of this vehicle condition sensing module (24) and this speed of a motor vehicle signal input interface (26) to judge that whether automobile is because just (for example meet with special driving situation earlier, during automobile skids), based on this, this control unit (22) need compensate by the handling maneuver of judging vehicle drive and weaken or strengthen assisted diversion torsion, reaches the assisted diversion effect of wisdomization thus.

The marriage relation of the electronic assisted diversion module of this of supplemental instruction present embodiment (10) and this steering box (51), please refer to Fig. 7 A, 7B, in order to cooperate this assisted diversion module (10) must fixedly be located at this steering box (51) with tooth bar (511) engagement and this electronic assisted diversion module (10) of this steering box (51), this steering box (51) can further comprise the shell (512) that coats this tooth bar (511) and with a joining base (513) and an engagement adjustment group (514) of this shell (512) secure bond, this joining base (513) comprises a room, the inner space of this room is corresponding with this lower end (162) of this driving gearshaft (16), make this lower end (162) must insert in this room and with the groove face engagement of this tooth bar (511); Wherein, the housing of this electronic assisted diversion module (10) can further be locked on this joining base (513) with connecting elements such as bolts.

This engagement adjustment group (514) comprises an adjustment group pedestal (5141), one lining (5142), one spring (5144) and an adjustable bolt (5146), this adjustment group pedestal (5141) is fixed at this shell (512) or is integrally formed in this shell (512), and position that should adjustment group pedestal (5141) is corresponding with this tooth bar (511) position engaged with this lower end (162), this lining (5142), this spring (5144) and this adjustable bolt (5146) are inserted in this adjustment group pedestal (5141) in regular turn, and this adjustable bolt (5146) is locked on the free end of this adjustment group pedestal (5141), so, this lining (5142) can be because of the application of force of this adjustable bolt (5146) and this spring (5144), the meshing relation that continues to promote this tooth bar (511) and further promote this tooth bar (511) and this driving gearshaft (16), in addition, should electronic assisted diversion module (10) be considered as gauge member in design, again this steering box (51) is designed, to reach quick design-calculated purpose.

Again, please cooperate A referring to Fig. 8, because of electronic assisted diversion module of the present invention (10) is locked on the joining base (513) with connecting elements such as bolts, therefore, in the assembling of carrying out electronic assisted diversion module (10) when disassembling, only need connecting element to be locked or unclamp, can assemble or disassemble electronic assisted diversion module (10) by relative easily automobile steering device (51), please cooperate referring to Fig. 8 B again, 8C, Yin Mada (12) and torsion torque sensor (18) all are fixedly arranged on the housing of reductor (14) with fixation kits such as bolts again, therefore, if motor (12), when compound planet gear (142) or torsion torque sensor members such as (18) have the situation of damage, can be after unclamping connecting elements such as bolt, with the member that damages directly by separating on the housing, with maintenance and the replacing of carrying out damaged member, so, need not carry out disassembling of whole electronic assisted diversion module (10) even automobile steering device (51), not only can improve the efficient of member maintenance, and after the maintenance of carrying out member and changing, do not need to carry out once more Four wheel alignment, to reach the technology effect of quick maintenance.

Claims (1)

1. electronic assisted diversion module, it includes:

One reductor, it comprises a housing, one sun gear, one planet gear cluster, one Internal gear, an one king bolt gear and a driving gearshaft, this compound planet gear comprises a small helical gear and interval and the movable a plurality of planetary wheels that are inserted in this small helical gear, each planetary wheel and the engagement of this sun gear, and be subjected to the transmission of this sun gear and rotate this small helical gear, this Internal gear is sheathed and be engaged in each planetary wheel, this small helical gear and this king bolt gear mesh, this small helical gear and this king bolt gear are a variable speed relationship, this driving gearshaft axially plugs secure bond in this king bolt gear again, on it, following two ends are a Steering gear and the steering box in order to be incorporated into an automobile respectively, this driving gearshaft and the engagement of this steering box;

One motor is incorporated on this housing with connecting element, and is connected with this sun gear is coaxial;

One torsion torque sensor is incorporated on this housing with connecting element, and is sheathed on this driving gearshaft, and it is in order to respond to the torsion that this driving gearshaft is driven by this Steering gear; And

One electrically connects the controller of its outputting torsion of this motor of control break according to this torsion with this motor and this torsion torque sensor.

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