TWM548753U - Electronic parking caliper - Google Patents

Description

Electronic parking caliper

The present invention relates to a brake system, and more particularly to an electronic parking caliper.

There is an electronic parking caliper (TW No. I468600), comprising a body unit, a lining unit, a swaying unit and an aligning unit, the body unit having a first side seat and a connecting body a second side seat on a side of the first side seat, the first side seat has a first groove, a shaft hole extending from the outer side surface to the first groove and disposed along a center line, and two a first through hole on one side of the shaft hole, the second side seat has a second groove and two second through holes corresponding to the first through holes, so that the sheet unit has a first and second positioning members And a first and second actuating piece fixed to the first and second positioning members, the tilting unit has a first and second tilting member, and a plurality of linkages connected between the first and second movable members The rod and the number provide the first and second elastic members of the sheet, the first flap is disposed between the first side seat and the first positioning member, and has a protrusion extending in the shaft hole and An extension pipe portion disposed along the center line, a screw hole disposed in the extension pipe portion and disposed along the center line, and a second portion disposed at the top And two projection tubes are disposed on the first perforated tube of the plurality of first projections. The second swaying member is disposed between the second side seat and the second positioning member, and has two second through holes disposed at the top. The linkage rods respectively pass through the first and second through holes of the first and second side seats and the first and second perforations of the first and second raking members, and each has a certain positioning position of the second swaying member The end portion and a pull end opposite to the positioning end, the actuating unit has an actuating member coupled to the linking rods and an actuating shaft driven by the actuating member.

When the actuating member of the actuating unit is activated and the actuating shaft is driven to rotate, the first tilting member can be driven, and the second tilting member sequentially abuts against the brake disc along the center line. You can achieve the purpose of parking.

Although the above-mentioned structure can achieve the intended operational purpose, because the first swaying member moves relative to the body unit, the extension tube portion of the first damper member easily interferes with the shaft hole, and the first The male tube may also interfere with the first through holes, causing the actuating shaft to easily cause breakage.

Therefore, the purpose of the present invention is to provide an electronic parking caliper that can extend the life of the machine.

Therefore, the electronic parking caliper of the present invention is suitable for use with a brake disc having a first end surface perpendicular to an axis and a second end surface opposite to the first end surface, the parking caliper comprising a The main unit, the one-piece unit, the one-moving unit, the unifying unit and the one-way bearing unit. The main body unit has a first side seat corresponding to the first end surface and a second side seat corresponding to the second end surface and coupled to one side of the first side seat, the first side seat and the second side The seat mating together forms an accommodating space for the brake disc to extend into, wherein the sheet unit has a slidable portion disposed in the accommodating space parallel to the axis and interposed between the first side seat and the a first positioning member between the first end faces, a first fastening piece fixed to the first positioning member, and a second side seat disposed in the accommodating space and movably disposed parallel to the axis a second positioning member disposed between the second end surface and a second positioning piece fixed to the second positioning member, the first and second ordering sheets are respectively adjacent to the first and second end faces, the 掣The movable unit has a first swaying member disposed in the accommodating space and movable between the first side seat and the first locating member, and being movable parallel to the axis a second raking member in the accommodating space and between the second side seat and the second positioning member is connected to the first a linkage rod between the two jaws and parallel to the axis, and an elastic member for providing the first and second pieces of elastic force, each of the linkage rods having a positioning end and a pair of the second flap member The elastic force of the elastic members is such that the elastic force of the elastic members constantly keeps the first and second sheets away from the first and second end faces, and the actuating unit has a connection to the cymbal. Actuating members of the pull ends of the moving unit and an actuating shaft extending along a center line parallel to the axis and driven by the actuating member, the actuating shaft driving the first tilting member along the center Disposing a line, and causing the first piece to be abutted or away from the first end face, and distracting the second damper along the center line through the linkage rod, the universal bearing unit is disposed One of the first side seat and the first tilting member can provide pivoting relative to the center line when the first tilting member moves relative to the first side seat.

The utility model has the following advantages: the first shank is disposed on the first side seat or the first swaying member, and the first swaying member is moved relative to the first side, the first 掣The movable member can be pivoted relative to the center line to avoid breakage of the actuating shaft due to interference, and the service life of the mechanism can be extended.

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 FIG. 1 to FIG. 3, a first embodiment of the electronic parking caliper of the present invention is used in combination with a brake disc 200 having a first end surface 210 perpendicular to an axis L1 and a The second end surface 220 opposite to the first end surface 210 includes a body unit 10, a sheet unit 20, a tilting unit 30, an actuating unit 40 and a universal bearing unit 60.

The main body unit 10 has a first side seat 11 corresponding to the first end surface 210 and a second side seat 12 corresponding to the second end surface 220 and coupled to one side of the first side seat 11 , the first side The seat 11 and the second side seat 12 are combined to form an accommodating space 13 into which the brake disc 200 can be inserted. The first side seat 11 has a first groove 111 adjacent to the first end surface 210, an axis which can be penetrated from the outer side surface to the first groove 111 and is disposed along a center line L2 parallel to the axis L1. a hole 112 and a pair of first through holes 113 disposed on one side of the shaft hole 112. The second side seat 12 has a second groove 121 adjacent to the second end surface 220 and a pair of the same The second through hole 123 is formed coaxially with the hole 113.

The sheet unit 20 has a first positioning member 21 that is disposed parallel to the axis L1 and is disposed in the first groove 111 along the center line L2, and a first fixing member 21 fixed to the first positioning member 21 The second positioning member 23 and the second positioning member 23 fixed to the second positioning member 23 are disposed in the second recess 121 and are movable along the axis L1 and parallel to the center line L2. The sheet 24, the first and second sheets 22, 24 are adjacent to the first and second end faces 210, 220, respectively.

The swaying unit 30 has a first swaying member 31, which is movably disposed in the accommodating space 13 and is interposed between the first side seat 11 and the first locating member 21 a second swaying member 32, which is movably disposed in the accommodating space 13 and is interposed between the second side seat 12 and the second locating member 23, is connected to the first and second The interlocking rods 33 and the two between the tilting members 31, 32 and parallel to the axis L1, the center line L2, and the elastic members 34 for providing the first and second sheets 22, 24 are elastic.

The first damper 31 has a first body 311, an extension tube portion 312 protruding from the first body 311 and extending in the shaft hole 112, and a snail disposed in the extension tube portion 312. a first protrusion 314 protruding from the first body 311 and extending in the first through hole 113 and a pair of first holes respectively disposed in the first protrusions 314 315.

The second slinger 32 has a second main body 321 , a second convex tube 322 protruding from the second main body 321 and extending in the second through holes 123 , and a pair of the same a second through hole 323 in the second convex tube 322.

The connecting rods 33 pass through the first and second through holes 113 and 123 of the first and second side seats 11 and 12 and the first and second through holes 315 and 323 of the first and second movable members 31 and 32, respectively. Each of the positioning ends 331 and the pair of positioning ends 331 opposite to the positioning end 331 are enlarged and can be respectively resisted. The ends of the second protruding tubes 322 are threaded and can pass outside the first through holes 113. The elastic force of the elastic members 34 keeps the first and second pieces 22 and 24 away from the first and second end faces 210 and 220. In the embodiment, the elastic members 34 are compression springs and are respectively sleeved. On the interlocking levers 33, the opposite ends are respectively biased against the first and second raking members 31, 32.

The actuating unit 40 has a bracket 41 connected to the pull ends 332 of the tilting unit 30, and an actuation of the pull ends 332 that are also connected to the tilting unit 30 through the bracket 41. A member 42, a sleeve 43 that is positioned relative to the bracket 41 along the centerline L2, and an actuation shaft 44 that extends along the centerline L2 and is driven by the actuator 42. The bracket 41 is locked to the pull end 332 of the linkage rod 33 by a plurality of nuts 411 and has a circular hole 412 disposed along the center line L2. The actuating member 42 is fixed on the bracket 41. The actuating member 42 of the embodiment is a combination of a motor and a deceleration wheel set, and has a pair of outputs corresponding to the circular hole 412 and capable of driving the actuating shaft 44 to rotate. Axis 421. The sleeve 43 has a sleeve portion 431 which is disposed along the center line L2 and is hollow, and a shoulder surface 432 disposed in the sleeve portion 431. The extension tube portion 312 of the first flap member 31 extends In the sleeve portion 431. The actuating shaft 44 passes through the circular hole 412 of the bracket 41 along the center line L2 and is axially disposed in the sleeve 43 and has a retaining ring portion 441 that abuts the shoulder surface 432 of the sleeve 43. a retaining ring 442 disposed on the side of the retaining ring portion 441 and blocking the outer side of the bracket 41, and a threaded portion 443 disposed on the other side of the retaining ring portion 441 and screwed into the screw hole 312 The retaining ring portion 441 abuts against the shoulder surface 432 of the sleeve 43 and the retaining ring 442 is blocked outside the bracket 41, so that the actuating shaft 44 can be opposite the bracket 41 along the center line L2. The actuator 42 and the sleeve 43 create a position.

The universal bearing unit 60 of the present embodiment is disposed on the first side seat 11 to provide pivoting of the first tilting member 31 relative to the center line L2. The universal bearing unit 60 has a first universal bearing 61 disposed in the shaft hole 112 and disposed through the extension pipe portion 312, and a pair of first universal bearings 61 disposed in the first through holes 113 and respectively provided for the same. The second male tube 314 is bored by the first male tube 314. The first universal bearing 61 has a first outer ring member 611 having a hollow ring shape and nested in the shaft hole 112, and a hollow ring-shaped and pivotally mounted inside the first outer ring member 611. The first inner ring member 612 is slidably disposed in the first inner ring members 612. The second universal bearing 62 has a second outer ring member 621 which is hollow and annularly nested in the first through holes 113, and a hollow ring-shaped and pivotally mounted to the second outer ring member 621. A second inner ring member 622 inside the outer ring member 621 is slidably disposed in the second inner ring members 622.

As shown in FIG. 1 and FIG. 3, when the parking caliper 100 is integrally assembled and positioned relative to the brake disc 200, the first and second orders 22, 24 are used under normal conditions. There is a gap 50 between the first and second end faces 210 and 220, so that the brake disc 200 can be freely rotated without being braked.

As shown in FIG. 5, when the vehicle is to be parked, the operator activates the actuating member 42 of the actuating unit 40, and the output shaft 421 drives the actuating shaft 44 to rotate, and the retaining ring portion 441 is used to abut the shaft. The shoulder surface 432 of the sleeve 43 and the buckle 442 are stopped outside the bracket 41, so that the actuation shaft 44 can be along the center line L2 relative to the bracket 41, the actuating member 42 and the sleeve 43 Positioning is generated, and the rotation of the bracket 41 can be performed in situ, and the threaded portion 443 is screwed with the screw hole 313 of the first tilting member 31 to drive the first tilting member 31 along the threaded portion 443. The center line L2 is displaced toward the brake disc 200, and the first positioning member 21 and the first routing piece 22 of the sheet unit 20 are pushed by the first tilting member 31, and relative to The first end surface 210 is offset. At this time, the gap 50 between the first end surface 210 and the first routing piece 22 is eliminated, but the first side seat 11 and the first tilting piece are eliminated. Another gap 50' is created between 31, and the second is such that the sheet 24 is not driven, so the gap 50 still exists between the second end surface 220.

As shown in FIG. 6, in the state in which the actuating member 42 of the actuating unit 40 continues to be activated, since the first piece 22 has been positioned against the first end face 210, it is also actuated. The retaining ring portion 441 of the shaft 44 abuts against the shoulder surface 432 of the sleeve 43 and the retaining ring 442 is blocked outside the bracket 41 such that the actuating shaft 44 is opposite the bracket along the center line L2. 41. The actuating member 42 and the sleeve 43 are configured to be positioned. When the actuating shaft 44 continues to rotate, the first trigger member 31 is positioned relative to the center line L2, and the actuation is performed. The shaft 44 is rotated relative to the first swaying member 31, and the bracket 41 of the actuating unit 40 drives the actuating member 42 and the linkage rods 33 to be displaced toward the right side of FIG. 6 and utilized. The positioning end 331 also pushes against the second convex tube 322 of the second swaying member 32 toward the right side of FIG. 6 , so that the second positioning member 23 and the second urging piece 24 of the sheet unit 20 are received. The second swaying member 32 is pushed against the second end surface 220, and the gap 50 between the second end surface 220 and the second slab 24 is eliminated. in Another gap 50" is generated between the second side seat 12 and the second tilting member 32. That is, the bracket 41 of the actuating unit 40 drives the actuating member 42 along the center line L2 toward FIG. 6. When the right side is displaced, the second oscillating member 32 is displaced along the center line L2 by the linkage rods 33, and the first and second pieces 22 and 24 are respectively opposite to the first and second end faces 210, When the 220 is offset, the parking purpose can be achieved (at this time, the elastic members 34 are in a compressed state and have a spring force released).

When the operator activates the actuating member 42 of the actuating unit 40 again, the output shaft 421 drives the actuating shaft 44 to generate a reverse rotation, which can then drive the first and second pieces 22, 24 from FIG. The brake state returns to the state of FIG. 5, and the state of FIG. 5 returns to the normal unbraked state of FIG. 3. In the above operation, the first and second comes with the elastic force of the elastic members 34. The sheets 22, 24 can be surely moved away from the brake disc 200 in the normal unbraked state of FIG.

During the above operation, and when the first swaying member 31 is moved relative to the body unit 10, the extension tube portion 312 of the first ramming member 31 or the first convex tube 314 is opposite to the When the center line L2 is inclined, the installation of the universal bearing unit 60, that is, the first universal bearing 61 is provided in the shaft hole 112 and the extending portion 312 is disposed, and The second universal bearing 62 is disposed in the first through holes 113 and is respectively provided for the first protruding tubes 314 to pass through, and the first body 311 of the first tilting member 31 is opposite to the second body 311. When the center line L2 is inclined, the extension tube portion 312 can drive the first inner ring member 612 to pivot relative to the first outer ring member 611, and the first protrusion tubes 314 can drive the second inner ring The member 622 is pivoted relative to the second outer ring members 621 to avoid interference between the extension tube portion 312 and the shaft hole, and to prevent the first convex tubes 314 from interfering with the first through holes 113. Therefore, it can be ensured that the actuating shaft 44 and the mating components can avoid damage, and the operation is smooth and can be extended The service life of mechanical parts.

In addition, when the actuating member 42 is activated, the first agitating member 31 and the first deflecting piece 22 are driven to be displaced relative to the first end surface 210 by the actuating shaft 44, and then the connecting rods are transmitted through the connecting rods. 33, the second swaying member 32 and the second sliding piece 24 are displaced relative to the second end surface 220, not only can achieve the parking purpose, but also operate the actuating member 42 electronically, and the operation is quite easy, especially It is easier to park and release the front and rear of the uphill slope, and the overall structure and structure of the parking caliper 100 is simple and the manufacturing assembly is also quite easy.

As shown in FIG. 7, a second embodiment of the electronic parking caliper of the present invention also includes a body unit 10', a sheet unit 20, a tilting unit 30', an actuating unit 40 and a universal bearing. Unit 60'. The difference from the first embodiment is that the shaft hole 112' of the body unit 10' is non-circular (this embodiment may be a hexagonal hole, not shown in FIG. 7), and the tilting unit 30' The first swaying member 31' has a first body 311', an extension tube portion 312' pivotally connected to the first body 311' and extending in the shaft hole 112'. a screw hole 313' in the extension tube portion 312', a pair of first convex tubes 314' protruding from the first body 311' and extending in the first through holes 113, and a pair respectively The first through hole 315' of the first convex tube 314', the cross-sectional shape of the extension tube portion 312' perpendicular to the center line L2 is also hexagonal, and the extension tube portion 312' can only follow the center line L2 A displacement is generated with respect to the shaft hole 112', and rotation cannot be made with respect to the body unit 10'. The universal bearing unit 60' has a ball-shaped pivoting head 61' disposed on the first body 31' and a ball-hole-shaped pivot hole 62' disposed in the extending tube portion 312'. The rotor 61' is rotatably nested in the pivot hole 62'. In addition, the electronic parking caliper further includes a pair of self-lubricating bearings 70 respectively disposed between the first convex tubes 314' and the first through holes 113.

When the actuating unit 40 is activated and the first tilting member 31' is displaced relative to the first side seat 11, the arrangement of the universal bearing unit 60' is utilized, and the first body 311' can be used relative to The extension tube portion 312 ′ functions as a pivoting function, and the first protruding tube 314 ′ is provided with the self-lubricating bearing 70 to smoothly move relative to the first through holes 113 , and the first swaying piece can be made 31' is pivoted relative to the center line L2, and the extension tube portion 312' is prevented from interfering with the shaft hole 112, so that the actuation shaft 44 and the mating member can be prevented from being damaged, and the operation is smooth. Moreover, the service life of the machine can be extended, and the same purpose and effect as the first embodiment can be achieved.

It is worth mentioning that, in the above embodiment, the actuating member of the actuating unit adopts a combination of a motor and a reduction wheel set, but a solenoid valve or a pressure cylinder (not shown) may be used, if a solenoid valve or a pressure cylinder is used. At the time, the actuating shaft does not rotate and only displaces along the axial direction of the centerline.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

100‧‧‧Parking calipers
10‧‧‧ body unit
L2‧‧‧ center line
11‧‧‧First side seat
111‧‧‧First groove
112‧‧‧Axis hole
113‧‧‧ first through hole
12‧‧‧Second side seat
121‧‧‧second groove
123‧‧‧second through hole
20‧‧‧Legs unit
21‧‧‧First positioning piece
22‧‧‧First Order Film
23‧‧‧Second positioning parts
24‧‧‧Second order film
30‧‧‧掣动单元
31‧‧‧First moving piece
311‧‧‧ first subject
312‧‧‧Extension tube
313‧‧‧ screw holes
314‧‧‧First convex tube
315‧‧‧First perforation
32‧‧‧Second moving parts
321‧‧‧ second subject
322‧‧‧second convex tube
323‧‧‧Second perforation
33‧‧‧ linkage rod
331‧‧‧ Positioning end
332‧‧‧ Pulling end
34‧‧‧Flexible parts
40‧‧‧Activity unit
41‧‧‧ bracket
411‧‧‧ nuts
412‧‧‧ round hole
42‧‧‧Acoustic
421‧‧‧Output shaft
43‧‧‧ bushings
431‧‧‧ casing department
432‧‧‧ Shoulder
44‧‧‧Acoustic axis
441‧‧ ‧ ring
442‧‧‧ buckle
443‧‧‧Threaded Department
50‧‧‧ gap
50'‧‧‧ gap
50" ‧ ‧ gap
60‧‧‧ universal bearing unit
61‧‧‧First universal bearing
611‧‧‧First outer ring
612‧‧‧First inner ring
62‧‧‧2nd universal bearing
621‧‧‧Second outer ring
622‧‧‧Second inner ring
200‧‧‧ brake discs
L1‧‧‧ axis
210‧‧‧ first end face
220‧‧‧second end face
10'‧‧‧ body unit
112'‧‧‧ shaft hole
30'‧‧‧掣Unit
31'‧‧‧The first moving piece
311'‧‧‧ first subject
312'‧‧‧Extension tube
313'‧‧‧ screw hole
314'‧‧‧First convex tube
315'‧‧‧First perforation
60'‧‧‧ universal bearing unit
61'‧‧‧ pivoting head
62'‧‧‧ pivot hole
70‧‧‧Self-lubricated bearings

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a perspective view of a first embodiment of the electronic parking caliper of the present invention, illustrating the parking caliper with a Figure 2 is an exploded perspective view of the first embodiment; Figure 3 is a plan view of the first embodiment of the first embodiment, illustrating the parking caliper relative to the brake disc in an unbraked state; Is a cross-sectional view taken along line IV-IV in FIG. 3; FIG. 5 is a schematic view of the operation of the first embodiment, illustrating a first end of the parking caliper relative to a first end face of the brake disc FIG. 6 is a parking diagram of the first embodiment, illustrating that a second piece of the parking caliper is also abutted against a second end surface of the brake disc; and FIG. 7 is the electronic type of the present invention. A plan view of a second embodiment of a parking caliper.

100‧‧‧Parking calipers

10‧‧‧ body unit

L2‧‧‧ center line

11‧‧‧First side seat

111‧‧‧First groove

112‧‧‧Axis hole

113‧‧‧ first through hole

12‧‧‧Second side seat

121‧‧‧second groove

322‧‧‧second convex tube

323‧‧‧Second perforation

33‧‧‧ linkage rod

331‧‧‧ Positioning end

332‧‧‧ Pulling end

34‧‧‧Flexible parts

40‧‧‧Activity unit

41‧‧‧ bracket

411‧‧‧ nuts

123‧‧‧Second through hole

20‧‧‧Legs unit

21‧‧‧First positioning piece

22‧‧‧First order film

23‧‧‧Second positioning parts

24‧‧‧Second order film

30‧‧‧掣动单元

31‧‧‧First moving piece

311‧‧‧ first subject

312‧‧‧Extension tube

313‧‧‧ screw holes

314‧‧‧First convex tube

315‧‧‧First perforation

32‧‧‧Second moving parts

321‧‧‧ second subject

412‧‧‧ round hole

42‧‧‧Acoustic

43‧‧‧ bushings

431‧‧‧ casing department

44‧‧‧Acoustic axis

441‧‧ ‧ ring

442‧‧‧ buckle

443‧‧‧Threaded Department

60‧‧‧ universal bearing unit

61‧‧‧First universal bearing

611‧‧‧First outer ring

612‧‧‧First inner ring

62‧‧‧2nd universal bearing

621‧‧‧Second outer ring

622‧‧‧Second inner ring

Claims (6)

An electronic parking caliper suitable for use with a brake disc having a first end surface perpendicular to an axis and a second end surface opposite the first end surface, the parking caliper comprising: a body unit a first side seat corresponding to the first end surface and a second side seat corresponding to the second end surface and coupled to one side of the first side seat, the first side seat and the second side seat pair Cooperating to form an accommodating space into which the brake disc protrudes; a sheet unit having a unit movable in the accommodating space parallel to the axis and interposed between the first side seat and the first a first positioning member between the one end surface, a first fastening piece fixed to the first positioning member, a second movable portion disposed in the accommodating space and parallel to the axis a second positioning member between the second end surface and a second fastening piece fixed to the second positioning member, the first and second ordering sheets are respectively adjacent to the first and second end faces; a unit having a movable parallel to the axis and disposed in the accommodating space a first damper between the seat and the first locating member, a second movably disposed parallel to the axis and disposed between the second side seat and the second locating member a swaying member, a plurality of connecting rods connected between the first and second raking members and parallel to the axis, and a plurality of elastic members for providing the first and second pieces of elastic force, each of the linking rods having a certain position a positioning end of the second swaying member and a pair of pulling ends corresponding to the axis and opposite to the positioning end, the elastic force of the elastic members constantly keeping the first and second pieces away from the first and second end faces An actuating unit having an actuating member coupled to the pull end of the tilting unit and an actuating shaft extending along a centerline parallel to the axis and driven by the actuating member, the actuating shaft The first swaying member is driven to be displaced along the center line, and the first urging piece is caused to abut or move away from the first end surface, and the second cocking member is moved along the connecting rod The center line is displaced; and a universal bearing unit is disposed on the first side seat and the first One of the raking members can provide pivoting relative to the centerline when the first swaying member moves relative to the first side seat. The electronic parking caliper according to claim 1, wherein the first side seat of the main body unit has a shaft hole disposed along a center line and a plurality of first through holes disposed on one side of the shaft hole, the second The side seat has a plurality of second through holes respectively disposed coaxially with the first through holes, and the first tilting member of the tilting unit has a first body, a protruding portion of the first body and extending therefrom An extension tube portion in the shaft hole, a screw hole disposed in the extension tube portion, and a plurality of first convex tubes protruding from the first body and extending in the first through holes and a plurality of a first through hole of the first protruding tubes, the pulling ends of the connecting rods respectively pass through the first through holes, the universal bearing unit has a shaft hole disposed in the first side seat and is provided for a first gimbal bearing slidably extending through the extension pipe portion, the first gimbal bearing having a first outer ring member having a hollow ring shape and nested in the shaft hole, and a hollow annular and pivotable a first inner ring member that is rotatably mounted inside the first outer ring member, the extended tube portion being slidably disposed in the first inner ring member The electronic parking caliper according to claim 2, wherein the universal bearing unit further has a pair of second universal bearing respectively disposed in the first through holes and respectively for the first convex tubes to pass through The second universal bearing has a second outer ring member which is hollow and is respectively nested in the first through holes and a hollow ring and is pivotally mounted to the second outer ring. a second inner ring member inside the ring member, the first protruding tubes are slidably disposed in the second inner ring members. The electronic parking caliper of claim 1, wherein the shaft hole of the body unit has a non-circular shape, and the first swaying member of the swaying unit has a first body and is pivotally connected to the first a main body and an extension tube portion extending in the shaft hole, a screw hole disposed in the extension tube portion, and a pair of protrusions protruding from the first body and extending in the first through hole a convex tube and a pair of first perforations respectively disposed in the first conical tubes, the cross-sectional shape of the extension tube portion perpendicular to the center line is also hexagonal, and the extension tube portion can only be relatively along the center line The shaft hole is displaced and cannot rotate relative to the body unit, and the universal bearing unit has a pivoting head and a setting disposed on one of the first body and the first protruding tube and being spherical And a ballhole-shaped pivot hole in the first body and the other of the extension tube portions, the pivoting head is rotatably nested in the pivot hole. The electronic parking caliper according to claim 4, wherein the pivoting head of the universal bearing unit is disposed on the first body, and the pivot hole is disposed in the extension tube portion. The electronic parking caliper according to claim 5, further comprising a pair of self-lubricating bearings respectively disposed between the first convex tubes and the first through holes.