TWI523780B - Vehicle brake transmission - Google Patents

Description

Vehicle parking brake

The present invention relates to a transmission device, and more particularly to a vehicle parking brake device that can drive a caliper to actuate.

Referring to Fig. 1, it is an "electric brake actuator" of the Continental Patent Publication No. 101031459. This patent discloses a transmission configuration using two pulleys 11 and a belt 12 to operate a motor 13 to drive a planetary gear. The mechanism 14 operates to drive a brake 15 to actuate. However, such an electric brake actuator has the following disadvantages:

First, the number of transmission parts is large, so the assembly and assembly are more complicated, and the cost is higher.

Second, the use of the belt 12 for a long time will cause aging, and the resulting tightness will be inconsistent, and its durability is poor.

Third, the use of such an electric actuator, which needs to be matched with a caliper used for overall design, can not achieve a rapid modification mechanism.

Therefore, the object of the present invention is to provide a non-reverse effect, a small number of transmission components, a simple structure, a low cost, and an easy assembly. The vehicle has a high reduction ratio, a rapid research and development mechanism, and is convenient for use with a caliper and has high reliability.

Therefore, the vehicle parking brake device of the present invention is used for driving a caliper device, and the vehicle parking brake device comprises a housing unit, a motor assembly, and a reduction unit.

The housing unit includes a ring tooth that surrounds a first axis.

The motor assembly is disposed on the housing unit and includes a motor and a worm extending along a second axis perpendicular to the first axis and driven by the motor.

The speed reduction unit is disposed in the housing unit, and includes a worm gear drive member driven by the worm and rotating about the first axis, a planet carrier located below the worm gear transmission member, and the plurality of a planet gear between the carrier and the worm gear and meshing with the ring gear, the worm gear has a worm gear meshing with the worm, and a worm wheel disposed on the bottom side of the worm wheel and extending along the first axis In the sun gear of the planets, the planet carrier has an input shaft coupled to the caliper device and extending along the first axis.

Wherein, the motor can drive the worm to rotate to drive the worm gear transmission member and the planetary gears to rotate, thereby driving the input shaft of the carrier to rotate to actuate the caliper device to perform the braking action.

The utility model has the advantages that: by using the worm and the worm wheel, the long-term use can also achieve a stable transmission effect, and on the other hand, the worm and the worm wheel have the mechanical characteristics to achieve the anti-reverse And the effect of high reduction ratio, coupled with the invention, the number of transmission components is small, The structure is simple, the assembly is easy, and the assembly time and the manufacturing cost can be effectively shortened. On the other hand, the present invention can be easily mounted to various types of caliper devices, so that a rapid research and development mechanism can be achieved.

10‧‧‧ caliper device

101‧‧‧ seat

102‧‧‧ linkage rod

103‧‧‧acting rod

2‧‧‧Sheet unit

21‧‧‧ bottom seat

211‧‧‧ bottom wall

212‧‧‧The main room

213‧‧‧main surround wall

214‧‧‧Second room

215‧‧‧ Surrounding walls

21’‧‧‧Shell

211’‧‧‧ top wall

212'‧‧‧ pivoting groove

213’‧‧‧The main room

214’‧‧‧Main surround wall

215’‧‧‧Second room

216’‧‧‧ Surrounding walls

22‧‧‧Upper cover assembly

221‧‧ ‧ cover ontology

222‧‧‧ pivoting groove

23‧‧‧ ring teeth

24‧‧‧First bearing

25‧‧‧second bearing

26‧‧‧stop bumps

3‧‧‧Motor components

31‧‧‧Motor

32‧‧‧ worm

4‧‧‧Deceleration unit

41‧‧‧ worm gear transmission

411‧‧‧ worm gear

412‧‧‧Sun Wheel

413‧‧‧ pivot shaft

414‧‧‧Limited convex axis

42‧‧‧ planet carrier

421‧‧‧ input shaft

4211‧‧‧ Groove

422‧‧‧ board body

423‧‧‧Installation pins

424‧‧‧Flange

425‧‧‧ Limit hole

43‧‧‧ planet wheels

L1‧‧‧first axis

L2‧‧‧second axis

Other features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments, wherein: Figure 1 is a cross-sectional view of a conventional electric brake actuator; 3 is a perspective view of a first preferred embodiment of the first preferred embodiment; FIG. 3 is an exploded perspective view of the first preferred embodiment; FIG. 4 is another perspective view of the first preferred embodiment, and FIG. a caliper device, an upper cover assembly of a housing unit, a worm gear transmission of a reduction unit, and a plurality of planet wheels; FIG. 5 is a cross-sectional view taken from line VV of FIG. 2; FIG. 6 is taken from line VV of FIG. FIG. 7 is another perspective exploded view of the first preferred embodiment illustrating the assembled state of operation; FIG. 8 is a perspective view of a second preferred embodiment of the vehicle parking brake transmission device of the present invention; Figure 9 is a cross-sectional view taken on line IX-IX of Figure 8.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 2, 3, 5, and 6, the vehicle of the present invention A first preferred embodiment of the brake transmission device for driving a caliper device 10, the caliper device 10 includes a socket 101, a linkage rod 102 disposed in the socket 101, and a linkage rod The driving device 103 is driven to move or retract linearly to clamp or loosen a disc (not shown). The vehicle parking brake includes a housing unit 2, a motor assembly 3, and a reduction unit 4.

The housing unit 2 includes a bottom housing 21 corresponding to the socket 101 of the caliper device 10, and an upper cover assembly 22 removably disposed on the upper side of the bottom housing 21, surrounding a first axis L1 and a ring tooth 23 disposed on the bottom housing 21, a first bearing 24 disposed along the first axis L1 and having the first axis L1 as an axis, and a second axis L2 A second bearing 25 disposed on the bottom housing 21 and having the second axis L2 as an axis, and a plurality of stop projections 26 respectively disposed on the bottom housing 21 and surrounding the first axis L1. In the first preferred embodiment, the first axis L1 is perpendicular to the second axis L2, and the stop bumps 26 are made of a soft material for increasing the buffering capability.

The bottom housing 21 has a bottom wall 211 disposed perpendicular to the first axis L1 and removably disposed on the socket 101, and an upper portion of the bottom wall 211 extending upwardly to define a main chamber 212. A main surrounding wall 213, and a secondary surrounding wall 215 connected to the main surrounding wall 213 and surrounding the second axis L2 and defining a secondary chamber 214 communicating with the main chamber 212. The deceleration unit 4 is received in the main chamber 212, and the second bearing 25 is received in the secondary chamber 214. The ring teeth 23 are disposed inside the main surrounding wall 213.

The upper cover assembly 22 has a vertical axis L1 and The cover body 221 of the bottom case 21 is detachably covered, and a pivoting groove 222 is formed at an intermediate position of the cover body 221 for receiving the first bearing 24.

The motor assembly 3 is detachably disposed on the housing unit 2, and includes a motor 31, and a receiving portion of the secondary chamber 214 and having one end extending through the second bearing 25 and extending along the second axis L2 And the worm 32 is driven by the motor 31.

The reduction unit 4 is disposed in the main chamber 212 of the housing unit 2, and includes a worm gear 41 driven by the worm 32 to rotate about the first axis L1, and a worm gear transmission The carrier 42 below the member 41 and the planetary gears 43 respectively disposed between the carrier 42 and the worm gear 41 and meshed with the ring teeth 23. In the first preferred embodiment, the deceleration unit 4 is a mechanism of a first-order planetary group, and can also be designed as a multi-stage planetary group, and should not be disclosed in the first preferred embodiment. For the limit.

The worm gear 41 has a worm wheel 411 meshing with the worm 32, a sun gear 412 disposed on the bottom side of the worm wheel 411 and extending along the first axis L1 and engaging the planet gears 43. a pivoting shaft 413 extending from the first axis L1 and extending through the first axis L1, and a limiting protrusion 414 disposed on the bottom side of the sun gear 412 and extending along the first axis L1 .

4, the carrier 42 has an input shaft 421 that is disposed on the bottom housing 21 and connected to the linkage rod 102 of the caliper device 10 and extends along the first axis L1, and is connected to the input. Shaft 421 The plate body 422 and the number of mounting pins 423 respectively disposed on the opposite side of the input shaft 421 and for the planetary gears 43 are respectively protruded from the outer periphery of the plate body 422 and can be And a limiting hole 425 formed by the limiting protrusion 414 and the limiting axis 414 . In the first preferred embodiment, the input shaft 421 has a recess 4211 for abutting one end of the linkage rod 102. The recess 4211 has a cam-like function, so when the input shaft 421 rotates, That is, the linkage rod 102 can be pushed to swing to interlock the actuation rod 103. The input shaft 421 can also be designed as a screw to actuate the caliper device 10, and should not be limited by the contents disclosed in the first preferred embodiment. On the other hand, the design of the stop projections 26 and the flanges 424 is used to block the rotation angle of the carrier 42 so that the carrier 42 can rotate within a certain angular stroke. In order to prevent the input shaft 421 from being rotated by an excessive angle, the caliper device 10 is damaged.

In addition, it should be noted that, in the first preferred embodiment, the ring gear 23 is integrally formed on the main surrounding wall 213 of the bottom housing 21, and the worm 32 and the motor 31 are integrally designed. The sun gear 412 is integral with the worm wheel 411, and the plate body 422 is integral with the input shaft 421. However, in its practical implementation, the ring gear 23 and the bottom housing 21, the worm 32 and the motor 31. The sun gear 412 and the worm wheel 411, and the plate body 422 and the input shaft 421 can be respectively designed as separate components, and should not be limited by the contents disclosed in the first preferred embodiment.

In the first preferred embodiment, when the motor 31 is driven to drive the worm 32 to rotate about the second axis L2, the worm wheel 411 capable of driving the worm gear 41 drives the sun gear 412. The first axis L1 is rotated about the axis, and the planetary gears 43 of the reduction unit 4 are driven to rotate and revolve, and then the input shaft 421 of the carrier 42 is rotated about the first axis L1. The linkage rod 102 is oscillated to interlock the actuation rod 103, so that the actuation rod 103 can create an action of clamping and relaxing the disc (not shown) to achieve the purpose of parking the brake. Wherein, by the transmission of the worm 32 and the worm wheel 411, the transmission stability of the invention is better under long-term use, and on the other hand, the mechanical characteristics of the worm 32 and the worm wheel 411 can also be utilized. The present invention allows the motor 31 to be reversed by the force transmitted by the caliper device 10 during the power-off process, so that it has a good anti-reverse effect. On the other hand, since the worm 32 and the worm wheel 411 are used to have a high reduction ratio characteristic, the present invention can change the design of the third-order or higher speed reduction mechanism to the second-order speed reduction mechanism in a limited space. The number of transmission elements of the invention can be reduced, and it is possible to have only the configuration of the three transmission elements of the worm gear transmission 41 and the two planetary wheels 43, and, at the same gear ratio, the number of transmission components of the present invention It is the least of the related integrated electronic parking brakes (IEPB).

Referring to FIG. 7 , a schematic view of the assembly of the first preferred embodiment is assembled. The assembly of the bottom housing 21 and the carrier 42 is first mounted on the caliper device 10 , and the upper cover assembly 22 is After the worm gear transmissions 41 are assembled together, the planetary gears 43 are respectively placed on the planetary gears 43. The mounting pins 423 of the carrier 42 are then mounted on the bottom housing 21 with the upper cover assembly 22 and the worm gear 41 assembled. Finally, the motor assembly 3 is assembled to the bottom. Shell seat 21. Therefore, the present invention has a small number of transmission elements, a simple structure, and is easy to install, and can effectively shorten the assembly time.

Referring to FIG. 8 and FIG. 9, a second preferred embodiment of the vehicle parking brake device of the present invention is substantially the same as the first preferred embodiment, and the difference is as follows: The housing unit 2 includes a cover 21 ′ that is detachably disposed on the caliper device 10 . The cover 21 ′ has a top wall 211 ′ perpendicular to the first axis L1 and a top wall 211 . a pivoting groove 212', a main surrounding wall 214' extending downward from the outer periphery of the top wall 211' and defining a main chamber 213', and a connecting to the main surrounding wall 214' and surrounding the The second axis L2 defines a secondary surrounding wall 216' that communicates with the secondary chamber 215' of the main chamber 213', and the deceleration unit 4 is received in the main chamber 213'. The first bearing 24 is received in the pivoting groove 212'. The worm 32 and the second bearing 25 are respectively received in the secondary chamber 215'. The ring gear 23 is disposed on the inner side of the main surrounding wall 214'. .

In summary, the vehicle parking brake device of the present invention has the following advantages and effects:

1. In comparison with the prior art design of the belt 12 and the pulley 11, the present invention utilizes the worm 32 to cooperate with the worm wheel 411, which can achieve a stable transmission effect even under long-term use.

Second, by the mechanical characteristics of the worm 32 and the worm wheel 411, When the present invention is in the power-off process, the motor 31 is prevented from being reversed by the force transmitted from the caliper device 10, and has a back-stop effect. On the other hand, since the worm 32 and the worm wheel 411 are used to have a high reduction ratio characteristic, the present invention can change the design of the third-order or higher speed reduction mechanism to the second-order speed reduction mechanism in a limited space. The number of transmission elements of the invention can be reduced, and it is possible to have only the configuration of the three transmission elements of the worm gear transmission 41 and the two planetary wheels 43, and, at the same gear ratio, the number of transmission components of the present invention It is the least of the related integrated electronic parking brakes (IEPB).

Third, the transmission component of the invention has a small number of components, a simple structure and an extremely simple assembly, and can effectively shorten the assembly time and the manufacturing cost. On the other hand, the present invention can be easily installed in various types of caliper devices, so that a rapid research and development mechanism can be achieved.

4. The worm gear transmission 41 of the present invention has the worm wheel 411, the sun gear 412, the pivot shaft 413, and the limiting protrusion shaft 414, and is integrally formed, which is not used in the existing market space. Very novel.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

10‧‧‧ caliper device

101‧‧‧ seat

103‧‧‧acting rod

2‧‧‧Sheet unit

21‧‧‧ bottom seat

211‧‧‧ bottom wall

212‧‧‧The main room

213‧‧‧main surround wall

214‧‧‧Second room

215‧‧‧ Surrounding walls

22‧‧‧Upper cover assembly

221‧‧ ‧ cover ontology

222‧‧‧ pivoting groove

23‧‧‧ ring teeth

24‧‧‧First bearing

25‧‧‧second bearing

26‧‧‧stop bumps

3‧‧‧Motor components

31‧‧‧Motor

32‧‧‧ worm

4‧‧‧Deceleration unit

41‧‧‧ worm gear transmission

411‧‧‧ worm gear

412‧‧‧Sun Wheel

413‧‧‧ pivot shaft

414‧‧‧Limited convex axis

42‧‧‧ planet carrier

421‧‧‧ input shaft

422‧‧‧ board body

423‧‧‧Installation pins

424‧‧‧Flange

425‧‧‧ Limit hole

43‧‧‧ planet wheels

L1‧‧‧first axis

L2‧‧‧second axis

Claims (8)

A vehicle parking brake device for driving a caliper device, the vehicle parking brake device comprising: a housing unit including a ring tooth surrounding a first axis; a motor assembly disposed on the housing unit And including a motor, and a worm extending along a second axis perpendicular to the first axis and driven by the motor; and a reduction unit disposed in the housing unit and including a worm driven by the worm The first axis is a shaft-rotating worm gear, a carrier below the worm gear, and a plurality of planets respectively disposed between the carrier and the worm gear and meshing with the ring gear. The worm gear has a worm gear meshing with the worm, and a sun gear disposed on the bottom side of the worm wheel and extending along the first axis and engaging the planet wheels, the planet carrier having a caliper device coupled thereto An input shaft extending along the first axis; wherein the motor can drive the worm to rotate to drive the worm gear and the planetary gears to rotate, thereby driving the input shaft of the carrier to rotate To actuating means in the caliper brake operation. The vehicle parking brake transmission device of claim 1, wherein the housing unit further comprises a first bearing disposed along the first axis, and a second bearing disposed along the second axis, the carrier further Having a limiting hole formed at an intermediate position and centered on the first axis, the worm gear transmission member further has a pivot disposed on a top side of the worm wheel and extending along the first axis and passing through the first bearing Connecting the shaft, and one is disposed on the bottom side of the sun gear And a limiting convex shaft extending along the first axis and inserted into the limiting hole, the worm being disposed at one end of the second bearing. The vehicle parking brake transmission device of claim 2, wherein the housing unit further comprises a bottom housing provided on the input shaft for receiving the worm and the reduction unit, and a bottom housing disposed on the bottom housing The upper cover assembly on the upper side of the seat. The vehicle parking brake transmission device of claim 3, wherein the bottom housing has a bottom wall perpendicular to the first axis, and a main body extending upward from the outer periphery of the bottom wall and defining a main chamber a surrounding wall, and a secondary surrounding wall connected to the main surrounding wall and surrounding the second axis and defining a secondary chamber communicating with the main chamber, the upper cover assembly having a vertical axis and detachable Covering the cover body of the bottom housing, and a pivoting groove formed at an intermediate position of the cover body for receiving the first bearing, the speed reducing unit is received in the main chamber, the worm and the The second bearing is respectively received in the secondary chamber, and the ring tooth is disposed inside the main surrounding wall. The vehicle parking brake transmission device of claim 4, wherein the housing unit further comprises a plurality of stop projections respectively spaced apart from the bottom housing and surrounding the first axis, the stop projections being used for The limit of the rotation angle of the planet carrier. The vehicle parking brake transmission device of claim 5, wherein the stop projections are made of a soft material. The vehicle parking brake transmission device of claim 5, wherein the carrier further has a plate body connected to the input shaft, and the plurality of plate bodies are respectively disposed on the plate body and located on opposite sides of the input shaft for the planetary gears. Set The mounting pin and the flanges respectively protruding from the outer periphery of the plate body and capable of being blocked by the stop projections. The vehicle parking brake transmission device of claim 2, wherein the housing unit further comprises a housing removably disposed on the caliper device, the housing having a top wall perpendicular to the first axis, a pivoting groove formed in the top wall, a main surrounding wall extending downward from the outer peripheral edge of the top wall and defining a main chamber, and a connecting to the main surrounding wall and surrounding the second axis and defining a secondary surrounding wall connecting the secondary chamber of the main chamber, the deceleration unit is received in the main chamber, the first bearing is received in the pivoting groove, and the worm and the second bearing are respectively received In the secondary chamber, the ring teeth are disposed inside the main surrounding wall.