CN207554654U - A kind of electric brake actuator using toothed belt transmission - Google Patents

Abstract

The utility model discloses a kind of electric brake actuators using toothed belt transmission, motor fixed part in actuator shell and setting positioning stepped hole on motor rear cover, so as to which the both ends of motor are fully located on rational position, ensure the position of the small pulley mounted on motor output shaft, epicyclic gearbox makes entire epicyclic gearbox be located in the rational position of actuator shell by planet rubber mat piece and upper cover rubber mat piece, ensure the position for the big belt wheel being fixed in sun tooth shaft, pass through being used cooperatively for the positioning method of entire epicyclic gearbox and motor, ensure the centre-to-centre spacing of big small pulley.

Description

A kind of electric brake actuator using toothed belt transmission

Technical field

The utility model is related to a kind of electric brake actuator using toothed belt transmission, the electric brake actuator is main Parking braking during for vehicle parking substitutes traditional manpower by mechanical structure, and tension brake caliper brakes vehicle, It prevents from slipping by slope.

Background technology

The electronic parking actuator of toothed belt transmission structure, big belt wheel generally use and output planetary frame one are used at present Rotating shaft position, rotating shaft only have one end support to form cantilever beam structure or rotating shaft both ends be fixed on two cannot be straight It connects and simple beam structure is formed on the part being fixedly connected so that the both ends support accuracy of big belt wheel rotating shaft is poor.Further, due to The eccentric moment that the synchronous belt being connect with big belt wheel applies, support is uneven, causes the abrasion of supported hole on part is supported to become larger, Synchronous belt skids.Further, rotating shaft supported hole abrasion becomes larger, rotating shaft axle center deflection angle, leads in planetary assemblies the Level-one sun gear and the gap of first order planetary gear are uneven, influence planetary gear train transmission quality, synchronous belt is caused to skid.

Invention content

Technical problem to be solved in the utility model is：It overcomes the deficiencies of the prior art and provide a kind of using synchronous belt The electric brake actuator of transmission, with good positioning accuracy, so as to ensure that the spacing between big small pulley is accurate, precision Height, and it is efficient, convenient for automation mechanized operation.

In order to solve the above-mentioned technical problem, the technical solution of the utility model is：A kind of electronics using toothed belt transmission Brake actuator, including actuator shell, upper cover, motor rear cover, motor and epicyclic gearbox, the motor, epicyclic gearbox In the cavity formed positioned at actuator shell, motor rear cover, upper cover；In two end in contact of the inner wall and the motor of above-mentioned cavity Part is provided with the first location structure for limiting motor position, in the inner wall and the two of the epicyclic gearbox of above-mentioned cavity The second location structure for limiting epicyclic gearbox position is provided in place of end in contact.

Further, the actuator shell is included for accommodating the motor casing portion of motor and for accommodating epicyclic gearbox Gearhousing portion.

Further, first location structure includes being arranged on is used for positioning motor in the motor casing portion of actuator shell First positioning stepped hole of bearing boss and be arranged on motor rear cover bottom with motor tail bearing outer circle matched second Stepped hole is positioned, the motor rear cover is used to cover on the lower half of motor, and is fixedly connected with the actuator shell, motor Both ends be limited in the first positioning stepped hole and second positioning stepped hole in.

Further, second location structure includes being arranged on recessed for positioning the positioning of epicyclic gearbox on lid Slot, upper cover rubber mat piece and planet rubber mat piece, the lower part box of the epicyclic gearbox are limited simultaneously by planet rubber mat piece It is supported in the gearhousing portion of actuator shell, the outside of the planet rubber mat piece matches with the inner wall in gearhousing portion It closes, the inside of planet rubber mat piece is matched with the lateral surface of the lower part box of epicyclic gearbox；The epicyclic gearbox it is upper End is rotationally limited by upper cover rubber mat piece in the positioning groove of upper cover, and the shape of upper cover rubber mat piece and positioning The shape of groove matches.

Further, wheeled stand is additionally provided between the epicyclic gearbox and upper cover, the wheeled stand includes main body Portion and positioning region, the positioning region are extended upwardly to the top of the sun tooth shaft of planetary gear shaft by main part, and sun tooth shaft is led to It crosses bearing to be connected on positioning region, the positioning region is matched with the positioning groove of upper cover, and the upper cover rubber mat piece is arranged on Between positioning region and the positioning groove of upper cover.

Further, the internal diameter of the bottom in the gearhousing portion of the outer diameter and actuator shell of the planet rubber mat piece is matched It closes, the internal diameter of the planet rubber mat piece is matched with the outer diameter of the lower part box of epicyclic gearbox.

Further, interference is crimped with small pulley on the output shaft of the motor, in the sun tooth shaft of the epicyclic gearbox Interference is crimped with big belt wheel, and big small pulley is driven by synchronous belt and is driven.

Further, the center position of the small pulley is fixedly connected with small pulley inserts, the small pulley inserts and small band Wheel coaxial arrangement, the big belt wheel center position are fixedly connected with big belt wheel inserts, and the big belt wheel inserts and big belt wheel are coaxial Setting, the small pulley inserts are used to be interference fitted with the output shaft of motor and connect, and the big belt wheel inserts is used for and sun tooth Axis interference fit connection.

Further, small band wheel cap is also equipped on the small pulley, the small band wheel cap is caught in by retainer ring on motor shaft Reserved locating slot is so as to which small band wheel cap be fixed.

Further, it is provided with rubber pad for motor part between the first positioning stepped hole and motor bearings boss, described the Motor rear cover rubber mat piece is provided between two positioning stepped holes and motor tail bearing outer circle.

Further, the rubber pad for motor part and the thickness of motor rear cover rubber mat piece are 1mm, and allowance control is positive and negative 0.1mm。

Further, the thickness of the planet rubber mat piece is 0.9mm, and allowance control is in positive and negative 0.1mm；The upper cover rubber The thickness 0.7mm of mat piece, allowance control is in positive and negative 0.1mm.

Further, the motor casing portion of the actuator shell has the lower part being fitted into motor from lower part in actuator shell Opening, the motor rear cover are welded at the lower openings in motor casing portion of actuator shell, the motor casing portion of actuator shell, Motor rear cover, upper cover form the cavity of closing.

After employing above-mentioned technical proposal, the utility model has the advantages that：

On the one hand, motor fixed part of the utility model in actuator shell and setting positioning stepped hole on motor rear cover, So as to which the both ends of motor are fully located on rational position, so as to which the position for making motor is fixed, so as to ensure to be mounted on electricity The position of the small pulley of machine output shaft, on the other hand, the epicyclic gearbox of the utility model passes through planet rubber mat piece and upper cover Rubber mat piece makes entire epicyclic gearbox be located in the rational position of actuator shell, so as to ensure to be fixed in sun tooth shaft Big belt wheel position, by being used cooperatively for the positioning method of entire epicyclic gearbox and motor, ensure in big small pulley The heart away from；The electric brake actuator of the utility model is easy for installation, and work efficiency is improved, conducive to production automation is realized.

Description of the drawings

Fig. 1 is the front sectional view of the utility model；

Fig. 2 is the overall structure exploded view of the utility model；

Fig. 3 is the front sectional view of the motor of the utility model and the assembling structure of epicyclic gearbox；

Fig. 4 is the motor of the utility model and the internal structure schematic diagram of epicyclic gearbox；

Fig. 5 is the partial exploded view of the utility model.

Specific embodiment

In order to which the content for making the utility model is easier to be clearly understood, below according to specific embodiment and combine attached Figure, is described in further detail the utility model.

In order to improve the supporting way of sun tooth shaft, support strength is improved, the utility model provides a kind of using synchronization The electric brake actuator of belt drive structure.

As shown in Fig. 1 to 5, a kind of electric brake actuator, including

Sun tooth shaft 12, the sun tooth shaft 12 have connecting pin 12-1；

Ring gear 13, ring gear 13 are equipped with for across the first axle bearing bore of sun tooth shaft 12, the sun gear 12 Connecting pin 12-1 be supported on ring gear 13 by the first pulley bearing 14 being mounted in above-mentioned first axle bearing bore；

Wheeled stand 10, the wheeled stand 10 include main part 10-1 and positioning region 10-2, and the main part 10-1 is used It is fixedly connected in internal gear 13, wheeled stand 10 is made to form an entirety with ring gear 13, the positioning region 10-2 is equipped with For passing through the second bearing hole of sun tooth shaft 12, the connecting pin 12-1 of the sun tooth shaft 12 is by being mounted on above-mentioned second axis The second Bearing with wheel 16 in bearing bore is supported on wheeled stand 10；

The sun tooth shaft 12 is also fixedly connected with big belt wheel, the setting coaxial with big belt wheel of sun tooth shaft 12, also, described First pulley bearing 14 and second Bearing with wheel 16 are located at the both sides of big belt wheel respectively, and lateral pull is decomposed belt wheel On stent 10 and ring gear 13.

Preferably, as shown in Figures 1 to 4, the sun tooth shaft 12 further includes tail end 12-2, connecting pin 12-1 and tail end 12-2 Form similar inverted T-type structure；The ring gear 13 has accommodating cavity, and the first axle bearing bore is penetrated through with the accommodating cavity, described The size of the tail end 12-2 of sun tooth shaft 12 is more than the size of the first axle bearing bore of the ring gear 13, so that the tail of sun tooth shaft On the roof of accommodating cavity that end 12-2 is against ring gear 13.

Preferably, as shown in Fig. 2, the lateral surface of the ring gear 13 in the axial direction at least by outer diameter different two with one heart Circle structure is formed, and is formed up-small and down-big step structure 13-1, the step structure 13-1 and is used for location and installation wheeled stand 10, The main part 10-1 of the wheeled stand 10 has the matched medial surface of lateral surface with the ring gear 13, the main part 10-1 matches to merge with step structure 13-1 to be fixedly connected on the step structure 13-1.In the present embodiment, step structure 13-1 Be made of two concentric circles, but this step structure 13-1 structures without being limited thereto, can there are three or more concentric circles form, and And ensure to form up-small and down-big step structure；Likewise, the structure of the medial surface of the main part 10-1 of wheeled stand 10 Also change with the different ladder number of plies of step structure, in the present embodiment, the medial surface of main part 10-1 is only circle, for by The step structure for the multi-ladder number of plies that three or more concentric circles are formed, the medial surface of main part 10-1 is also terraced structure.

Preferably, the smaller concentric circles of outer diameter of the medial surface of the main part 10-1 of the wheeled stand 10 and ring gear 13 Structure forms clearance fit, larger concentric of the lateral surface of the main part 10-1 of the wheeled stand 10 and the outer diameter of ring gear 13 Circle structure has identical radial dimension, the main part 10-1 of the wheeled stand 10 and the outside step structure of ring gear 13 13-1 is achieved a fixed connection by fastener 26.

Preferably, as shown in Figure 2,3, the positioning region 10-2 of the wheeled stand 10 is extended upwardly to too by main part 10-1 The top of positive tooth shaft 12, positioning region 10-2 are connected as one with main part 10-1.

Preferably, the big belt wheel center position is fixedly connected with big belt wheel inserts 15, the big belt wheel inserts 15 with it is big Belt wheel is coaxially disposed, and the connecting pin 12-1 of the sun tooth shaft 12 passes through big belt wheel inserts 15, also, the sun tooth shaft 12 Connecting pin 12-1 be interference fitted to achieve a fixed connection with big belt wheel inserts 15.

Preferably, the first pulley bearing 14 is packed into the first axle bearing bore of ring gear 13 by way of interference crimping, Second Bearing with wheel 16 is packed into the second bearing hole of the positioning region 10-2 of wheeled stand 10 by way of interference crimping.

This electric brake actuator further includes upper cover 18, and upper cover is arranged on the top of sun tooth shaft 12, in the upper cover 18 Equipped with for positioning the positioning groove 18-1 of sun tooth shaft 12, the positioning region 10-2 of the wheeled stand 10 be provided with it is described The matched position portions of positioning groove 18-1, the position portion by the upper table of positioning region 10-2 face upward lid direction protrusion, The bearing hole of the second Bearing with wheel 16 of second Bearing with wheel 16 and assembling is located at the positioning region office.

This electric brake actuator further includes motor 25, and small pulley 23, the peace are equipped on the output shaft of the motor Big belt wheel and the synchronous belt 19 of the small pulley 23 and the big small pulley of driving in sun tooth shaft 12 together constitute biography Dynamic structure.

This electric brake actuator includes first planet carrier 7 and more on the planet wheel spindle of first planet carrier 7 In the accommodating cavity of a first planetary gear 11, the first planetary gear 11 and the whole loading ring gear 13 of first planet carrier 7, also, first Planetary gear 11 is engaged with the inner wall of ring gear 13 and the sun tooth shaft 12 among multiple first planetary gears.The present embodiment In, there are three the settings of the first planetary gear 11.

This electric brake actuator further includes output planetary frame 5 and on the planet wheel spindle of output planetary frame 5 In the accommodating cavity of multiple second planetary gears 6, the second planetary gear 6 and the whole loading ring gear 13 of output planetary frame 5, also, second Planetary gear 6 is engaged with the sun gear in the inner wall of ring gear 13 and first planet carrier 7.In the present embodiment, the second planetary gear 6 is set There are four putting.

For in the present embodiment, the situation of three the first planetary gears 11 and four the second planetary gears 6, the ring gear 13 Inner wall has two different circle support rings of modulus, wherein the support ring modulus of the side of the roof far from accommodating cavity is larger, is used for Coordinate with four the second planetary gears 6, close to accommodating cavity roof side support ring modulus it is smaller, for three the first rows Star-wheel 11 coordinates.

Preferably, the first planet carrier 7 is powder metallurgy material, and the output planetary frame 5 and ring gear 13 are modeling Expect material, the inserts and big belt wheel inserts 15 of the output planetary frame 5 are powder metallurgy inserts moulding.

This electric brake actuator further includes planet case lid 9, and the planet case lid 9 is arranged on the lower part of ring gear 13, and And the outer diameter of planet case lid 9 has identical radial dimension, also, planet with the concentric structure that the outer diameter of ring gear 13 is larger The main part 10-1 of case lid 9, the outside step structure 13-1 of ring gear 13 and wheeled stand 10 is realized solid by fastener 26 Fixed connection.

Sun tooth shaft 12 is connected to by way of interference fit on big belt wheel inserts 15, the first band wheel shaft of both ends setting Hold 14 and second Bearing with wheel 16 lateral pull is decomposed on wheeled stand 10 and ring gear 13, wheeled stand and ring gear Shape is positioned together, and is passed through the buckle carried on wheeled stand 10 and be fixedly attached on ring gear 13 so that supports big band The sun tooth shaft 12 of wheel is supported in the same part, rotating shaft of the sun tooth shaft 12 as big belt wheel, can be improved big belt wheel and be returned Turn positioning accuracy, and 15 both ends of the surface of big belt wheel inserts formed support, make support it is more stable, balance so that support part The abrasion of upper supported hole reduces, and synchronous belt is avoided to skid, and ensures that big belt wheel rotating shaft does not deflect, and ensures planetary gear train transmission Quality.

First pulley bearing 14 is fitted by way of interference crimping in the bearing hole of ring gear 13, the second Bearing with wheel 16 are fitted by way of interference crimping in the bearing hole of positioning region 10-2 of wheeled stand 10；Sun tooth shaft 12 is passed through into internal tooth After first pulley bearing 14 on circle, crimp, be then reloaded into the second pulley shaft with the mesoporous interference of big belt wheel inserts 15 Hold 16 wheeled stand 10.The supporting structure of big belt wheel entire in this way is simple beam structure, and bearing strength is compared with conventional cantilever beam branch Support improves a lot.The utility model avoids traditional structure after prolonged use, actuator by improving bearing strength Location hole abrasion in upper cover 18 or wheeled stand 10 becomes larger, and synchronous belt is caused to skid.The positioning of planetary gear train, tooth can also be improved It takes turns transmission efficiency to improve, lower noise.

In order to avoid by the conduct vibrations of motor to actuator shell, output resonates, and the utility model is stopped in above-mentioned electronics On the basis of vehicle actuator, further it is improved.

As shown in Figure 1,2,3, 4, a kind of electric brake actuator, including motor 25, epicyclic gearbox and connection motor With the drive mechanism of epicyclic gearbox, actuator shell 3, upper cover 18 and motor rear cover 1, the motor 25, planet tooth are further included Roller box and the drive mechanism of connection motor and epicyclic gearbox are located at actuator shell 3, upper cover 18 and motor rear cover 1 and are formed Cavity in, and motor 25 and epicyclic gearbox have certain interval with above-mentioned cavity inner wall, are provided in the gap more A rubber mat piece, motor and epicyclic gearbox are supported integrally in above-mentioned cavity.

Preferably, the thickness of the rubber mat piece is in the range of 0.7mm to 1mm.In the present embodiment, planet rubber mat piece 4 It is preferred that 0.9mm, 17 preferred 0.7mm of upper cover rubber mat piece, 24 preferred 1mm of motor rear cover rubber mat piece 2 and rubber pad for motor part is public Difference is controlled in positive and negative 0.1mm

Preferably, as shown in Figure 3,4, the lower part of the epicyclic gearbox has planet case lid 9, in planet case lid 9 with holding Rubber mat piece between row device shell 3 is planet rubber mat piece 4.

Preferably, as shown in Figure 3,4, the upper end of the epicyclic gearbox is provided with wheeled stand 10, the wheeled stand 10 are used to support the sun tooth shaft 12 of epicyclic gearbox, and at least one rubber pad is provided between wheeled stand 10 and upper cover 18 Part.

Specifically, the wheeled stand 10 includes main part 10-1 and positioning region 10-2, and the positioning region 10-2 is by main body Portion 10-1 extends upwardly to the top of sun tooth shaft 12, and sun gear 12 is connected to by bearing on the 10-2 of positioning region, described fixed Position portion 10-2 is matched with the location structure of upper cover 18, and the rubber mat piece between the positioning region 10-2 and upper cover 18 is upper cover rubber Rubber cushion part 17.

Planet rubber mat piece 4 and upper cover rubber mat piece 17 are arranged on the both ends of epicyclic gearbox, by epicyclic gearbox with The portion envelops that actuator shell 3, upper cover 18 contact get up, and epicyclic gearbox is made not contacted with actuator shell 3, upper cover 18, Noise is avoided to transmit outward.

Preferably, as shown in Fig. 1,3,4, the motor rear cover 1 is welded at 3 lower opening of actuator shell, described Gap location between motor rear cover 1 and motor 25 is provided with rubber mat piece, referred to as motor rear cover rubber mat piece 2.

Preferably, the gap location between the top of the motor 25 and actuator shell 3 is provided with rubber pad for motor part 24.

Motor rear cover rubber mat piece 2 and rubber pad for motor part 24 are arranged on the both ends of motor 25, by motor 25 with performing The portion envelops that device shell 3 and upper cover 18 contact get up, and motor is made not contacted with actuator shell 3, upper cover 18, avoids motor Noise and vibrations are transferred to actuator shell 3 outward, play the role of reducing noise.

The motor 25 and epicyclic gearbox of the utility model are supported on actuator shell 3 and upper cover by multiple rubber mat pieces In 18 cavitys formed, motor 25 and the entirety of epicyclic gearbox are supported on by rubber mat piece in cavity, motor 25 and planet tooth Roller box do not have with actuator shell 3 it is any contact, can avoid due to motor oscillating, conduct to actuator shell, output resonance, Play the role of reducing noise.

In order to ensure that the spacing between big small pulley is accurate, precision is high and efficient, convenient for automation mechanized operation, this implementation Example is further improved on above-mentioned base goes out.

As shown in Figures 1 to 4, a kind of electric brake actuator using toothed belt transmission, including actuator shell 3, upper cover 18th, motor rear cover 1, motor 25 and epicyclic gearbox, the motor 25, epicyclic gearbox are located at actuator shell 3, motor rear cover 1st, in the cavity that upper cover 18 is formed；It is provided with to limit electricity in place of the inner wall of above-mentioned cavity and two end in contact of the motor The first location structure that seat in the plane is put is provided in place of the inner wall of above-mentioned cavity and two end in contact of the epicyclic gearbox and is used for Limit the second location structure of epicyclic gearbox position.

Preferably, as shown in Fig. 2, the actuator shell 3 is included for accommodating the motor casing portion 3-2 of motor and for holding Receive the gearhousing portion 3-3 of epicyclic gearbox.

As shown in Figures 1 to 4, first location structure includes the use being arranged on the motor casing portion 3-2 of actuator shell 3 In positioning motor bearing boss first position stepped hole 3-1 and be arranged on 1 bottom of motor rear cover with outside motor tail bearing The matched second positioning stepped hole 1-1 of circle, the motor rear cover 1 is used to cover on the lower half of motor 25, and is held with described Row device shell 3 is fixedly connected, and the both ends of motor are limited in the positioning stepped holes of the first positioning stepped hole 3-1 and second 1-1.

As shown in Figures 1 to 4, second location structure include being arranged in upper cover 18 for positioning epicyclic gearbox Positioning groove 18-1, upper cover rubber mat piece 17 and planet rubber mat piece 4, the lower part box of the epicyclic gearbox pass through planet rubber Rubber cushion part 4 is limited and is supported in the gearhousing portion of actuator shell 3, the outside of the planet rubber mat piece 4 and gear The inner wall in case shell portion matches, and the inside of planet rubber mat piece 4 is matched with the lateral surface of the lower part box of epicyclic gearbox；Institute The upper end for stating epicyclic gearbox is rotationally limited by upper cover rubber mat piece 17 in the positioning groove 18-1 of upper cover 18, and The shape and the shape of positioning groove 18-1 of upper cover rubber mat piece 17 match.

As shown in Figure 2,3, 4, wheeled stand 10, the belt wheel branch are additionally provided between the epicyclic gearbox and upper cover 18 Frame 10 includes main part 10-1 and positioning region 10-2, and the positioning region 10-2 extends upwardly to planetary gear shaft by main part 10-1 Sun tooth shaft 12 top, sun tooth shaft 12 is connected to by bearing on the 10-2 of positioning region, the positioning region 10-2 and upper cover 18 positioning groove 18-1 is matched, and the upper cover rubber mat piece 17 is arranged on the positioning groove of positioning region 10-2 and upper cover 18 Between 18-1.

Preferably, as shown in Figure 1, the outer diameter of the planet rubber mat piece 4 and the bottom in the gearhousing portion of actuator shell 3 The minor diameter fit in portion, the internal diameter of the planet rubber mat piece 4 are matched with the outer diameter of the lower part box of epicyclic gearbox.

As shown in figure 5, interference is crimped with small pulley 23, the sun of the epicyclic gearbox on the output shaft of the motor 25 Interference is crimped with big belt wheel in tooth shaft 12, and big small pulley is driven by synchronous belt 19 and is driven.

As shown in Figure 1, 2, the center position of the small pulley 23 is fixedly connected with small pulley inserts 22, and the small pulley is embedding Part 32 is coaxially disposed with small pulley 23, and the big belt wheel center position is fixedly connected with big belt wheel inserts 15, and the big belt wheel is embedding Part 15 is coaxially disposed with big belt wheel, and the small pulley inserts 22 is used to be interference fitted with the output shaft of motor and connect, the big band Inserts 15 is taken turns to be used to be interference fitted connection with sun tooth shaft 12.

As shown in Figure 1, 2, small band wheel cap 21 is also equipped on the small pulley 23, the small band wheel cap 21 passes through retainer ring 20 The locating slot reserved on motor shaft is caught in so as to which small band wheel cap 21 be fixed.

As shown in Figure 3,4, it is provided with rubber pad for motor part between the first positioning stepped hole 3-1 and motor bearings boss 24, it is provided with motor rear cover rubber mat piece 2 between the second positioning stepped hole 1-1 and motor tail bearing outer circle.

In the present embodiment, the thickness of the planet rubber mat piece 4 is 0.9mm, and allowance control is in positive and negative 0.1mm；On described The thickness 0.7mm of lid rubber mat piece 17, allowance control is in positive and negative 0.1mm；The rubber pad for motor part 24 and motor rear cover rubber The thickness of mat piece 2 is 1mm, and allowance control is in positive and negative 0.1mm.

The motor casing portion of the actuator shell 3 has the lower openings being fitted into motor from lower part in actuator shell, The motor rear cover 1 is welded at the lower openings in motor casing portion of actuator shell 3, the motor casing portion of actuator shell 3, electricity Machine rear cover 1, upper cover 18 form the cavity of closing.

The drive mechanism that the motor 25 and the epicyclic gearbox are sequentially connected is synchronous belt 19, the synchronous belt 19 with Big small pulley is connected by meshing transmission.

There is provided the first positioning stepped hole 3-1 of positioning motor bearing boss on actuator shell 3, first by motor 25 from holding The opening at row device shell rear portion is packed into, and electric machine spacing is made to pass through interference pressure in the first positioning stepped hole 3-1, then by small pulley 23 The mode connect is installed on the output shaft of motor, then welds motor rear cover 1, and motor rear cover 1 is welded on opening for actuator shell 3 At mouthful, by motor package wherein, the second positioning stepped hole 1-1 set on motor rear cover plays motor in the work of limiting With motor is fully located on rational position by two stepped holes up and down in this way.

Planet rubber mat piece 4 and the minor diameter fit of the bottom of the gear fixed part of actuator shell 3 on epicyclic gearbox, Meanwhile the shape of the upper cover rubber mat piece 17 on wheeled stand 10 coordinates with the positioning groove 18-1 in upper cover 18, it will Entire epicyclic gearbox is located in rational position, so as to ensure that the position for the big belt wheel being fixed in sun tooth shaft 12.Row The positioning method of star gear-box and the positioning method of motor are used cooperatively, and ensure that the centre-to-centre spacing of two belt wheels of size.

After motor and epicyclic gearbox are installed in place, synchronous belt 19 is first installed, then small band wheel cap 21 is installed, finally with card Circle 20 is caught in the locating slot reserved on motor output shaft, fixed small band wheel cap 21.

On the one hand, motor fixed part of the utility model in actuator shell 3 and setting positioning ladder on motor rear cover 1 Hole, so as to which the both ends of motor 25 are fully located on rational position, so as to which the position for making motor is fixed, so as to ensure to install In the position of the small pulley 23 of motor output shaft, on the other hand, the epicyclic gearbox of the utility model passes through planet rubber mat piece 4 Entire epicyclic gearbox is made to be located in the rational position of actuator shell with upper cover rubber mat piece 17, so as to ensure to be fixed on too The position of big belt wheel in positive tooth shaft 12 by being used cooperatively for the positioning method of entire epicyclic gearbox and motor, ensures big The centre-to-centre spacing of small pulley；The electric brake actuator of the utility model is easy for installation, and work efficiency is improved, conducive to realizing production certainly Dynamicization.

Particular embodiments described above, the technical issues of being solved to the utility model, technical solution and advantageous effect into Go further description, it should be understood that the foregoing is merely specific embodiment of the utility model, and do not have to In limitation the utility model, within the spirit and principle of the utility model, any modification, equivalent substitution and improvements done Deng should be included within the scope of protection of this utility model.

Claims (13)

1. a kind of electric brake actuator using toothed belt transmission, it is characterised in that：Including actuator shell (3), upper cover (18), motor rear cover (1), motor (25) and epicyclic gearbox, the motor (25), epicyclic gearbox are located at actuator shell (3), in the cavity that motor rear cover (1), upper cover (18) are formed；In place of the inner wall of above-mentioned cavity and two end in contact of the motor The first location structure for limiting motor position is provided with, in two terminations of the inner wall and the epicyclic gearbox of above-mentioned cavity Tactile part is provided with the second location structure for limiting epicyclic gearbox position.

2. a kind of electric brake actuator using toothed belt transmission according to claim 1, it is characterised in that：It is described to hold Gearhousing portion of the row device shell (3) including being used to accommodate the motor casing portion of motor and for accommodating epicyclic gearbox.

3. a kind of electric brake actuator using toothed belt transmission according to claim 2, it is characterised in that：Described One location structure includes being arranged on the first positioning for positioning motor bearing boss in the motor casing portion of actuator shell (3) Stepped hole (3-1) and the second positioning stepped hole matched with motor tail bearing outer circle for being arranged on motor rear cover (1) bottom (1-1), the motor rear cover (1) are fixed with the actuator shell (3) and are connected for covering on the lower half of motor (25) It connects, the both ends of motor are limited in the first positioning stepped hole (3-1) and the second positioning stepped hole (1-1).

4. a kind of electric brake actuator using toothed belt transmission according to claim 2, it is characterised in that：Described Two location structures include being arranged on the positioning groove (18-1), the upper cover rubber pad that are used to position epicyclic gearbox in upper cover (18) Part (17) and planet rubber mat piece (4), the lower part box of the epicyclic gearbox are limited and are propped up by planet rubber mat piece (4) Support is in the gearhousing portion of actuator shell (3), the inner wall phase in the outside and gearhousing portion of the planet rubber mat piece (4) Cooperation, the inside of planet rubber mat piece (4) is matched with the lateral surface of the lower part box of epicyclic gearbox；The epicyclic gearbox Upper end rotationally limited by upper cover rubber mat piece (17) in the positioning groove (18-1) in upper cover (18), and upper cover rubber The shape of rubber cushion part (17) and the shape of positioning groove (18-1) match.

5. a kind of electric brake actuator using toothed belt transmission according to claim 4, it is characterised in that：The row Be additionally provided with wheeled stand (10) between star gear-box and upper cover (18), the wheeled stand (10) including main part (10-1) and Positioning region (10-2), the positioning region (10-2) are extended upwardly to the sun tooth shaft (12) of planetary gear shaft by main part (10-1) Top, sun tooth shaft (12) is connected to by bearing on positioning region (10-2), the positioning region (10-2) and upper cover (18) Positioning groove (18-1) matches, and the upper cover rubber mat piece (17) is arranged on positioning region (10-2) and the positioning of upper cover (18) is recessed Between slot (18-1).

6. a kind of electric brake actuator using toothed belt transmission according to claim 4, it is characterised in that：The row The outer diameter of star rubber mat piece (4) and the minor diameter fit of the bottom in the gearhousing portion of actuator shell (3), the planet rubber pad The internal diameter of part (4) is matched with the outer diameter of the lower part box of epicyclic gearbox.

7. a kind of electric brake actuator using toothed belt transmission according to claim 1, it is characterised in that：The electricity Interference is crimped with small pulley (23) on the output shaft of machine (25), in the sun tooth shaft (12) of the epicyclic gearbox interference be crimped with Big belt wheel, big small pulley are driven by synchronous belt (19) and are driven.

8. a kind of electric brake actuator using toothed belt transmission according to claim 7, it is characterised in that：It is described small The center position of belt wheel (23) is fixedly connected with small pulley inserts (22), and the small pulley inserts (22) and small pulley (23) are coaxial Setting, the big belt wheel center position are fixedly connected with big belt wheel inserts (15), and the big belt wheel inserts (15) and big belt wheel are same Axis is set, and the small pulley inserts (22) connects for being interference fitted with the output shaft of motor, and the big belt wheel inserts (15) is used It is connected in being interference fitted with sun tooth shaft (12).

9. a kind of electric brake actuator using toothed belt transmission according to claim 7, it is characterised in that：It is described small Small band wheel cap (21) is also equipped on belt wheel (23), the small band wheel cap (21) is caught in what is reserved on motor shaft by retainer ring (20) Locating slot is so as to fixed by small band wheel cap (21).

10. a kind of electric brake actuator using toothed belt transmission according to claim 3, it is characterised in that：It is described Rubber pad for motor part (24), the second positioning ladder are provided between first positioning stepped hole (3-1) and motor bearings boss Motor rear cover rubber mat piece (2) is provided between hole (1-1) and motor tail bearing outer circle.

11. a kind of electric brake actuator using toothed belt transmission according to claim 10, it is characterised in that：It is described Rubber pad for motor part (24) and the thickness of motor rear cover rubber mat piece (2) are 1mm, and allowance control is in positive and negative 0.1mm.

12. a kind of electric brake actuator using toothed belt transmission according to claim 4, it is characterised in that：It is described The thickness of planet rubber mat piece (4) is 0.9mm, and allowance control is in positive and negative 0.1mm；The thickness of the upper cover rubber mat piece (17) 0.7mm, allowance control is in positive and negative 0.1mm.

13. a kind of electric brake actuator using toothed belt transmission according to claim 2, it is characterised in that：It is described The motor casing portion of actuator shell (3) has a lower openings being fitted into from lower part motor in actuator shell, after the motor At the lower openings in motor casing portion that lid (1) is welded on actuator shell (3), after the motor casing portion of actuator shell (3), motor Cover (1), upper cover (18) forms the cavity of closing.