TWM621530U - Piston push back tool for disc brake - Google Patents

Abstract

A disc brake piston push-back tool, in the process of the piston push-back operation, through the first buckle slot on the first L-shaped elastic piece of the first buckle and the second L of the second buckle The second buckle notch on the shrapnel is kept on the first output shaft and the second output shaft throughout the whole process to produce a rotation limit effect of deducting the pressing stop, so as to prevent the swinging action of the operating handle of the reversible ratchet wrench. The ratchet member is linked together, which can ensure the stability and effectiveness of the output operation in the process of pushing back the piston, and also improves the convenience of using the tool with one hand.

Description

Disc Brake Piston Push Back Tool

The invention relates to a reversible ratchet wrench. The operation handle of the reversible ratchet wrench will not be linked with the rotation of the ratchet wheel, which can ensure the stability and effectiveness of the push-back output of the piston, and also improve the convenience of one-handed operation of the tool. tool.

Press, for vehicle brake system repairs with disc brakes, various special tools are usually required. Disc brakes, commonly include a caliper housing positioned adjacent a wheel assembly with a rotor or brake disc rotatably mounted therewith. A caliper housing is associated with at least one piston that moves back and forth in the cylinder and includes a pair of opposing brake pads for clamping the rotor in response to movement of the piston. When the driver depresses the brake pedal, brake fluid is forced from the master cylinder into the cylinder associated with the caliper housing to push the piston and force the brake pads to engage the rotor to stop the rotation of the wheel. When the brake pads wear out to a certain thickness after a period of use, they need to be replaced with new ones to maintain proper braking force during driving. However, as the pads continue to wear, the pistons gradually move outwards into the interior of the caliper housing, narrowing the space to accommodate the pads; in this case, the caliper housing is usually removed from the vehicle's wheel assembly , and use a special tool to separate the pads and/or push the piston back to its original position in the cylinder to replace the pads. The caliper housing can then be reinstalled and positioned in the wheel assembly, with the new brake pads sufficiently received in the caliper housing to engage the rotor.

Auto mechanics who are responsible for repairing disc brakes and replacing brake pads are known to use a variety of press tools; however, one difficulty with these press tools is the need for specialized mechanical use to implement one or more of the associated caliper housings. retraction of a piston. Therefore, there is still a need for an easy-to-use tool to operate the retraction of one or more pistons for brake maintenance and brake pad replacement.

Conventional easy-to-use tools, such as US Patent No. US8826504B1, a disc brake piston retractor tool, which is a tool that is placed in the inner space of the caliper housing, and is driven in one direction through the reciprocating swing operation of the reversible ratchet wrench. The first pressing plate and the second pressing plate gradually move outward toward the extended position, and when the first pressing plate abuts against the fixed wall of the caliper housing as a support, the protruding piston can be pushed back into the associated cylinder of the caliper housing by the second pressing plate initial position. Although the above-mentioned U.S. patent case can simply reciprocate the swing operation of the spacer rod of the reversible ratchet wrench assembly to achieve the function of pushing the piston back into the cylinder, but when the spacer rod swings back, the coupling is not restricted by the rotation, so that in the When the second pressure plate is not yet pressed against the piston, there will be a problem that the ratchet wheel rotates with the back swing of the spacer rod; The spring 11 pushes the plunger tip 12 against the surface of the nose 130 of the pawl 13, and the pawl teeth 131 still have a considerable degree of gripping force because the pawl teeth 131 maintain the position of the notch 140 of the ratchet wheel 14. The core-bonded coupler 15 is not restricted by the position of rotation, so that the coupler 15 is easy to rotate as the handle 1 swings back; in this way, the rotating action of the coupler 15 is through the threaded bolt 16 and the coupler 15. If the pressure plate 17 is not retracted in the process, it will be tilted when the handle 1 swings back; the general practice is that the operator needs to hold the pressure plate 17 with the other hand to avoid this situation, but it will affect the situation. Convenience to tool operation.

The main purpose of this creation is to provide a disc brake piston push-back tool, which is a tool including a reversible ratchet wrench, a first pressure plate set and a second pressure plate set;

The reversible ratchet wrench is connected with a power output member at the center of the ratchet member at the output end of an operating handle; the output member is on both sides of the center position of the ratchet member, respectively having an outer portion extending out of both sides of the output end of the operating handle a first output shaft and a second output shaft, and the surfaces of the first output shaft and the second output shaft are respectively formed with a first external thread and a second external thread with different helical directions;

The first pressing plate set includes a first pressing plate, a first nut and at least one first buckling rod; the first pressing plate has an outer surface and an inner surface; the first nut is opposite to the first pressing plate An output shaft is fixed on the inner surface of the first pressing plate, and has a first inner screw hole screwed with the first outer thread; the first locking rod is fastened on the first nut On the outer surface, toward the front edge of the first output shaft end, there is a first L-shaped elastic piece extending toward the surface of the first output shaft. The first L-shaped elastic piece corresponds to the diameter of the first output shaft and forms a the first snap-fit notch that is pressed against the first external thread and can bounce between the lines;

The second pressing plate set includes a second pressing plate, a second nut and at least one second buckling rod; the second pressing plate has an outer surface and an inner surface; the second nut is opposite to the second The output shaft is fixed on the inner surface of the second pressing plate, and has a second inner screw hole screwed with the second outer thread; the second buckling rod is fastened and arranged on the outer surface of the second nut , the front edge of the second output shaft end has a second L-shaped elastic piece extending toward the surface of the second output shaft. The second L-shaped elastic piece is corresponding to the diameter of the second output shaft. A second snap-fit slot that is locked on the second external thread and can bounce between the lines; when the first and second pressing plates of the tool are placed in an inner space of a caliper housing, and are When between at least one piston that is not pushed back and a fixed wall, through the selection of the output direction of the reversible ratchet wrench, only the operation handle of the reversible ratchet wrench is required to perform a back and forth pulling operation to link the first one. The output shaft and the second output shaft rotate in one direction, so that the helical motion of the first external thread and the second external thread acts on the first internal screw hole and the second nut of the non-rotating first nut On the second inner screw hole of the , the first pressure plate and the second pressure plate are driven to expand and displace away from each other; through the fixed wall, the expansion action of the first pressure plate and the second pressure plate is limited and supported by force to achieve The function of pushing the piston back to the starting position of the cylinder; during the whole process of pushing back the piston, the The second latching notch on the second L-shaped shrapnel is maintained on the first output shaft and the second output shaft throughout the entire process to produce a rotation-limiting effect of deducting the pressing stop, so as to make the operating handle of the reversible ratchet wrench return to the The swing action does not link the ratchet member, which can ensure the stability and effectiveness of the output operation during the push-back process of the piston, and also improves the convenience of one-handed use of the tool.

The second objective of the present invention is to provide a disc brake piston push-back tool, wherein an accommodating groove is provided inside the output end of the operating handle to pivot the ratchet member and a ratchet member, and the ratchet member is In the accommodating slot, a pivoting hole is pivoted on the side edge of the ratchet member, and both ends of the pivoting hole have a pair of push switching parts extending out of the accommodating slot. One side between the switching parts is formed with a nose-shaped convex part, and the other side is opposite to the shape of the tooth gap of the ratchet member, and two convex claws are formed at a distance, and one side of the ratchet member is installed on the A spring in a long groove pushes a stopper against one side surface of the nose-shaped protrusion, so that one of the two claws is caught on the tooth gap of the ratchet member; when the handle is operated When swinging in one direction, the ratchet can be rotated by the protruding pawl of the pawl. On the contrary, when swinging back, the stopper will be pushed into the long groove by the nose-shaped protrusion. Compression causes the convex pawl to jump on the tooth surface of the ratchet member, and the ratchet member will not be rotated to rotate, so as to obtain the effect of one-way output rotation of the ratchet member; by operating the handle to swing back, the stopper abuts the ratchet The surface of the nose-shaped convex part of the claw has low resistance when it is compressed and high sensitivity of the rebound and feedback action after being compressed, so that the first and second buckling rods can be used for the first output shaft and the second buckling rod. The rotation-limiting force of the second output shaft against the pressing stop is sufficient to limit the ratchet member from being toggled and rotated during the swinging operation of the operating handle.

Another object of the present invention is to provide a disc brake piston push-back tool, wherein a polygonal assembly hole is formed in the center of the ratchet member, and between the first output shaft and the second output shaft of the output member, Relative to the polygonal assembly hole, a polygonal joint portion is formed, and the polygonal joint portion is assembled on the polygonal assembly hole, so that the output member is combined with the center position of the ratchet member; The bar can be processed independently, so that the output member can be arranged in the center of the ratchet member and the waste loss of processing materials can be reduced.

Another object of the present invention is to provide a disc brake piston push-back tool, wherein the first pressure plate and the second pressure plate are respectively provided with a coupling hole relative to the first output shaft and the second output shaft, and The first nut and the second nut are respectively formed with a neck relative to the combining hole on the first pressing plate and the combining hole on the second pressing plate, and the necks of the first nut are tightened respectively. It is fitted and fixed on the combining hole of the first pressing plate, and the neck of the second nut is tightly fitted and fixed on the combining hole of the second pressing plate, so that the first pressing plate and the second pressing plate can be On both sides of the reversible ratchet wrench a concentric, symmetrical and balanced expansion away from each other and/or retraction close to each other is created.

Another object of the present invention is to provide a disc brake piston push-back tool, wherein the first nut has an even-numbered polygonal surface, and on the polygonal surface, a pair of paired surfaces are butted and fixed. The first buckling rod that matches the shape of the polygonal surface makes the first buckling notch on the first L-shaped elastic piece of the pair of first buckling rods buckle against each other and press against the first output shaft. On the surface of the first external thread, the polygonal surface of the first nut defines that the pair of first buckling rods do not swing and offset on the first nut, so that the first output shaft is subjected to the pair of first buckling rods. The first L-shaped shrapnel provided respectively by a buckling rod is pressed against the pressing stop together, which can achieve the excellent rotation restriction effect of the first output shaft when the operating handle of the reversible ratchet wrench swings back; and the above-mentioned A groove is formed around the polygonal surface of the first nut, and the pair of first buckling rods is provided with one or more clasps to be buckled into the trough relative to the trough, and the clasp is locked into the groove to restrain the The first buckling rod does not have the effect of axial displacement on the first nut, so that the first buckling notch of the first L-shaped elastic piece bounces between the lines of the first external thread, without the It will cause the pair of first buckling rods to be axially released from the polygonal surface of the first nut; and the pair of first buckling rods are butted on the polygonal surface of the first nut, and are tied at the docking position. The first L-shaped elastic piece is arranged on the remote end surface, and the remote end surface is formed with a pair of notches on both sides of the first L-shaped elastic piece, so as to make the first L-shaped elastic piece on the remote end surface. Connection, with good deformation recovery elasticity.

Another object of the present invention is to provide a disc brake piston push-back tool, wherein the second nut has an even-numbered polygonal surface, and on the polygonal surface, a pair of the first Two buckling rod pieces, the second buckling grooves on the second L-shaped elastic pieces of the pair of second buckling rod pieces are mutually buckled and pressed against the second external thread surface of the second output shaft. The polygonal surface of the second nut defines that the pair of second buckling rods do not swing and offset on the second nut, so that the second output shaft is affected by the second buckling rods respectively provided by the pair of second buckling rods. The L-shaped shrapnel together press against the pressing stop, which can achieve the excellent rotation restricting effect of the second output shaft when the operating handle of the reversible ratchet wrench swings back; and the polygonal surface of the second nut can A groove is formed around the groove, and the pair of second buckling rods is provided with one or more clasps to be buckled into the groove relative to the groove. The second nut does not have the effect of axial displacement, so that the second buckle groove of the second L-shaped spring piece bounces between the lines of the second external thread and does not cause the pair of second buckles. The rod piece is axially released from the polygonal surface of the second nut; and the pair of second buckling rods are butted on the polygonal surface of the second nut, and the second buckling rod is connected to the end surface away from the docking position. A pair of notches are formed on both sides of the second L-shaped elastic piece on the remote end surface, so that the connection of the second L-shaped elastic piece on the remote end surface has good deformation recovery elasticity .

1: handle

11: Spring

12: Plunger tip

13: Pawl

130: Nose

131: Claw teeth

14: Ratchet

15: Connector

16: Bolts

17: Platen

20: Tools

30: Reversible ratchet wrench

31: Operating the handle

310: Output end

311: accommodating slot

312: Long slot

32: Ratchet

320: Gear backlash

321: Polygonal assembly hole

33: Output parts

330: The first output shaft

330A: The first external thread

331: The second output shaft

331A: Second external thread

332: Polygonal joint

34: Pawl pieces

340: Pivot hole

341: Push switch

342: Nose convex part

343A, 343B: Claws

35: Spring

36: Stopper

40: The first platen group

41: The first platen

410: outer surface

411: inner surface

412: binding hole

42: The first nut

420: The first inner screw hole

421: neck

422: Polygon Surface

423: Slots

43, 43A: The first buckle

430, 430A: The first L-shaped shrapnel

431, 431A: the first buckle slot

432, 432A: Fasteners

433, 433A: away from end surface

434, 434A: Notch

50: Second platen group

51: Second platen

510: Outer surface

511: inner surface

512: binding hole

52: Second nut

520: Second inner screw hole

521: neck

522: Polygon Surface

523: Groove

53, 53A: The second buckle

530, 530A: Second L-shaped shrapnel

531, 531A: The second buckle slot

532, 532A: Fasteners

533, 533A: away from end surface

534, 534A: Notch

Figure 1 is a schematic diagram of the structure of the conventional tool

Figure 2 is a schematic diagram of the use state of conventional tools

Figure 3 is a three-dimensional view of the appearance of the creative structure

Figure 4 is an exploded perspective view of most of the structure of this creation

Figure 5 is an exploded perspective view of the structure of the reversible ratchet wrench of this creation

Figure 5A is a cross-sectional view of the combined structure of the reversible ratchet wrench of the present invention

Figure 6 is an exploded perspective view of the structure of the first and second pressure plate groups in this creation

Figure 7 is a cross-sectional view of the structure of the first and second plate sets of this creative combination

Figure 8 is a three-dimensional schematic diagram of the state in which the invention is used on the clamp housing

Figure 9 is a schematic diagram of the structure used in this invention on the clamp shell

Figure 10 is a schematic diagram of the push-back state of the piston on the clamp housing used in this creation

Figure 10A is a schematic diagram of the rotating state of the ratchet member of the reversible ratchet wrench of the present invention

Figure 11 is a sectional view of the structure of the first and second pressure plate groups during the reciprocating swinging process of the operating handle of the present invention

Fig. 12 is an enlarged view of the structure of part A of Fig. 11

Figure 13 is a schematic diagram of the state when the ratchet member of the reversible ratchet wrench of the present invention is limited in rotation

In order to achieve the above-mentioned purpose, the present creation specifically cites the preferred embodiment, and in conjunction with the accompanying drawings, it is described in detail as follows:

A disc brake piston push-back tool, as shown in Figures 3 and 4, is a tool 20, including a reversible ratchet wrench 30, a first pressure plate group 40 and a second pressure plate group 50;

The reversible ratchet wrench 30, as shown in Figures 4 and 5, is attached to the output end 310 of an operating handle 31 and is provided with an output member 33 at the center of the ratchet member 32; There are respectively a first output shaft 330 and a second output shaft 331 extending out of both sides of the output end 310 of the operating handle 31, and the surfaces of the first output shaft 330 and the second output shaft 331 are respectively A first external thread 330A and a second external thread 331A with different helical directions are formed, preferably, the first external thread 330A is a right-handed external thread, and the second external thread 331A is a left-handed external thread;

The first pressing plate set 40 , as shown in FIGS. 4 , 6 and 7 , includes a first pressing plate 41 , a first nut 42 and at least one first buckling rod 43 ; the first pressing plate 41 has an outer surface 410 and An inner surface 411 ; the first nut 42 is fixed on the inner surface 411 of the first pressing plate 41 relative to the first output shaft 330 , and has a first inner thread threaded with the first outer thread 330A The screw hole 420; the first buckle member 43 is fastened on the outer surface of the first nut 42, and it has a front edge of the end of the first output shaft 330 extending toward the surface of the first output shaft 330. The first L-shaped elastic piece 430, the first L-shaped elastic piece 43 0. Corresponding to the diameter of the first output shaft 330, a first buckle notch 431 is formed that is pressed against the first external thread 330A and can bounce between the lines;

The second pressing plate set 50, as shown in FIGS. 6 and 7, includes a second pressing plate 51, a second nut 52 and at least one second buckling rod 53; the second pressing plate 51 has an outer surface 510 and an inner surface 511; the second nut 52 is fixed on the inner surface 511 of the second pressing plate 51 relative to the second output shaft 331, and has a second inner screw hole 520 screwed with the second outer thread 331A; The second locking rod 53 is fastened on the outer surface of the second nut 52 , and has a second L-shape extending toward the surface of the second output shaft 331 toward the front edge of the end of the second output shaft 331 . The elastic piece 530, the second L-shaped elastic piece 530 is corresponding to the diameter of the second output shaft 331, and is formed with a second buckled slot 531 that snaps against the second external thread 331A and can bounce between the lines ;

8 , 9 and 10 , when the first pressing plate 41 and the second pressing plate 51 of the tool 20 are placed in an inner space 61 of a caliper housing 60 , at least one piston 62 and a When fixing between the walls 63, through the selection of the output direction of the reversible ratchet wrench 30 (for example, selecting a counterclockwise force), only the operating handle 31 of the reversible ratchet wrench 30 needs to be reciprocated. 5) The first output shaft 330 and the second output shaft 331 are linked to rotate in one direction (counterclockwise) by the ratchet member 32 (counterclockwise rotation), so that the first external thread 330A (right-handed external thread) and the The helical motion of the second external thread 331A (left-handed external thread) acts on the first internal screw hole 420 of the first nut 42 and the second internal screw hole 520 of the second nut 52 that do not rotate, The first pressure plate 41 and the second pressure plate 51 are driven to move away from each other for expansion and displacement; appearance The surface 510 abuts against the fixed wall 63 and is supported), so as to push the piston 62 (by the outer surface 410 of the first pressing plate 41 ) back to the starting position of the cylinder; 62 During the push-back operation, the first buckle notch 431 on the first L-shaped elastic piece 430 of the first buckle member 43 and the second L-shaped spring piece 530 of the second buckle The two engaging notches 531 are maintained on the first output shaft 330 and the second output shaft 331 throughout the entire process to produce a rotation-limiting effect of deducting the pressing stop, so as to prevent the operating handle 31 of the reversible ratchet wrench 30 from swinging back. The ratchet member 32 is linked to ensure the stability and effectiveness of the output operation of the piston 62 in the pushing back process, and also enhances the convenience of the tool 20 to be used with one hand.

According to the above embodiment, as shown in FIGS. 5 and 5A , inside the output end 310 of the operating handle 31 , an accommodating groove 311 is set to pivot the ratchet member 32 and a ratchet member 34 , and the ratchet member 34 is in the In the accommodating groove 311, a pivot hole 340 is pivoted on the side edge of the ratchet member 32. The two ends of the pivot hole 340 have a pair of extending from the accommodating groove 311 for selecting the output direction. A nose-shaped convex portion 342 is formed on one side of the pair of push switching portions 341, and the other side is opposite to the shape of the tooth gap 320 of the ratchet member 32, and two claws 343A, 343B, and one side of the pawl member 34 is pushed by a spring 35 installed in a long groove 312 to push a stop member 36 (preferably a steel ball) against the nose-shaped protrusion 342, so that one of the two claws 343A, 343B 343A and/or 343B is caught on the tooth gap 320 of the ratchet member 32; as shown in FIG. 10A, when the handle 31 is operated in one direction ( When swinging counterclockwise, the ratchet member 32 can be rotated (counterclockwise) by the claw 343A of the pawl member 34. On the contrary, as shown in Fig. 13, when swinging back, the nose-shaped convex portion 342 Compress the stopper 36 into the long groove 312 , so that the pawl 343A is on the tooth surface of the ratchet member 32 Jumping up, the ratchet member 32 will not be rotated to rotate, so that the ratchet member 32 can be rotated in one direction. As shown in Figures 12 and 13, when the handle 31 swings back by operating the handle 31, the stopper 36 abuts against the pawl member The surface of the nose-shaped convex portion 342 of 34 has low resistance when it is compressed and high sensitivity of the rebound and feedback action after being compressed, so that the first L-shaped elastic piece 430 of the first buckle member 43 and the second buckle member The second L-shaped elastic piece 530 of 53 , which is used to limit the rotation of the first output shaft 330 and the second output shaft 331 , is able to prevent the ratchet member 32 from being swung back during the swinging operation of the handle 31 . The pawl member 34 is toggled to rotate.

According to the above embodiment, as shown in FIGS. 5 and 5A , a polygonal assembly hole 321 (preferably a hexagonal assembly hole) is formed in the center of the ratchet member 32 , and the first output shaft 330 of the output member 33 is connected to the Between the second output shafts 331 , opposite the polygonal assembly hole 321 , a polygonal joint portion 332 is formed, and the polygonal joint portion 332 is assembled on the polygonal assembly hole 321 , so that the output member 33 is combined with the polygonal assembly hole 321 . The ratchet member 32 is located at the center position; the output member 33 can be used to independently process the rod, so that the ratchet member 32 is positioned in the center of the output member 33, thereby reducing the waste loss of processing materials.

According to the above embodiment, as shown in FIGS. 4 , 6 , and 7 , the first pressure plate 41 and the second pressure plate 51 are respectively provided with a combination hole 412 and 512 relative to the first output shaft 330 and the second output shaft 331 . , and the first nut 42 and the second nut 52 are respectively formed with a neck 421 and 521 corresponding to the coupling hole 412 on the first pressing plate 41 and the coupling hole 512 on the second pressing plate 51 , which are respectively The neck 421 of the first nut 42 is tightly fitted (hydraulic or welded) to the coupling hole 412 of the first pressing plate 41 , and the neck 521 of the second nut 52 A tight fit (hydraulic bonding or welding bonding) is fixed on the coupling hole 512 of the second pressing plate 51, so that the first pressing plate 41 And the second pressing plate 51 can generate concentric, symmetrical and balanced expansion and/or retraction close to each other on both sides of the reversible ratchet wrench 30 .

According to the above embodiment, as shown in FIGS. 4 , 6 and 7 , the first nut 42 has an even-numbered polygonal surface 422 (preferably a hexagonal surface). (fixed) there is a pair of the first buckling rods 43, 43A that match the shape of the polygonal surface 422 and are formed of elastic metal sheet material, so that the first L-shaped elastic pieces of the pair of first buckling rods 43, 43A are The first engaging slots 431 and 431A on 430 and 430A are mutually engaged and pressed against each other on the surface of the first external thread 330A of the first output shaft 330 , and are defined by the polygonal surface 422 of the first nut 42 . The pair of first buckling members 43, 43A are not swayed and offset on the first nut 42, so that the first output shaft 330 receives the first L of the pair of first buckling members 43, 43A respectively. The shrapnel 430 and 430A are pressed together against the pressing stop, as shown in FIGS. 8 and 10 , when the operating handle 31 of the reversible ratchet wrench 30 is swung back during the swinging operation, the excellent rotation limiting effect of the first output shaft 330 can be achieved; as shown in the figure 6, and a groove 423 is formed around the polygonal surface 422 of the first nut 42, and the pair of first buckling rods 43, 43A is provided with more than one buckling member to be buckled into the groove 423 relative to the groove 423 432, 432A, by the fasteners 432, 432A being buckled into the groove 423 to limit the effect of the pair of first fasteners 43, 43A on the first nut 42 not to produce axial displacement, as shown in FIG. 12, so that The process of bouncing the first engaging notches 431 and 431A of the first L-shaped elastic pieces 430 and 430A between the lines of the first external thread 330A will not cause the pair of first buckling rods 43 and 43A to escape from the second thread. The polygonal surface 422 of a nut 42 is axially disengaged; as shown in FIG. 6 , the above-mentioned pair of first buckling rods 43 and 43A are butted on the polygonal surface 422 of the first nut 42, and are tied at the docking position (the screw The first L-shaped elastic pieces 430, 430A are provided on the remote end surfaces 433, 433A of the locking position), and the remote end surfaces 433, 433A have a pair of notches formed on both sides of the first L-shaped elastic pieces 430, 430A The openings 434, 434A enable the connection of the first L-shaped elastic pieces 430, 430A on the remote end surfaces 433, 433A to have good deformation recovery elasticity.

According to the above embodiment, as shown in FIGS. 4 , 6 and 7 , the second nut 52 has an even-numbered polygonal surface 522 (preferably a hexagonal surface). (fixed) there are a pair of the second buckling rods 53, 53A that match the shape of the polygonal surface 522 and are formed of elastic metal sheet material, so that the second L-shaped elastic pieces of the pair of second buckling rods 53, 53A are The second engaging grooves 531 and 531A on 530 and 530A are mutually engaged and pressed against the surface of the second external thread 331A of the second output shaft 331 . The polygonal surface 522 of the second nut 52 defines the The second buckling rods 53 and 53A are not swayed and offset on the second nut 52 so that the second output shaft 331 receives the second L-shape of the pair of second buckling rods 53 and 53A, respectively. The elastic pieces 530 and 530A are pressed together against the pressing stop, as shown in FIGS. 8 and 10 , which can achieve the excellent rotation restriction effect of the second output shaft 331 when the operating handle 31 of the reversible ratchet wrench 30 swings back; as shown in FIG. 6 , and a groove 523 is formed around the polygonal surface 522 of the second nut 52 , and the pair of second buckling rods 53 and 53A are provided with more than one buckle 532 corresponding to the groove 523 to be buckled into the groove 523 , 532A, by the fasteners 532, 532A being buckled into the groove 523 to limit the effect of the pair of second fasteners 53, 53A on the second nut 52 not to produce axial displacement, so that the second L The second buckle notches 531 and 531A of the shaped elastic pieces 530 and 530A bounce between the lines of the second external thread 331A. The process will not cause the pair of second buckling rods 53, 53A to be axially released from the polygonal surface 522 of the second nut 52; as shown in FIG. The polygonal surfaces 522 of the second nut 52 are butted together, and the second L-shaped elastic pieces 530 and 530A are provided on the remote end surfaces 533 and 533A of the docking position (screw locking position), and the remote end surfaces 533 and 533A are provided with A pair of notches 534, 534A are formed on both sides of the second L-shaped elastic pieces 530, 530A, so that the connection of the second L-shaped elastic pieces 530, 530A on the remote end surfaces 533, 533A has good deformation recovery elasticity.

The above description is only illustrative rather than restrictive for the present creation, and those of ordinary skill in the art will understand that many modifications, changes or the like can be made without departing from the spirit and scope defined by the accompanying description. effect, but will fall within the scope of protection of this creation.

30: Reversible ratchet wrench

330: The first output shaft

330A: The first external thread

331: The second output shaft

331A: Second external thread

40: The first platen group

41: The first platen

410: outer surface

411: inner surface

412: binding hole

42: The first nut

420: The first inner screw hole

421: neck

43, 43A: The first buckle

430, 430A: The first L-shaped shrapnel

431, 431A: the first buckle slot

50: Second platen group

51: Second platen

510: Outer surface

511: inner surface

512: binding hole

52: Second nut

520: Second inner screw hole

521: neck

53, 53A: Second buckle

530, 530A: Second L-shaped shrapnel

531, 531A: The second buckle slot

Claims (10)

A disc brake piston push-back tool, which is a tool, includes a reversible ratchet wrench, a first pressure plate group and a second pressure plate group; The reversible ratchet wrench is connected with an output piece at the center of the ratchet piece at the output end of an operating handle. a first output shaft and a second output shaft, and the surfaces of the first output shaft and the second output shaft are respectively formed with a first external thread and a second external thread with different helical directions; The first pressing plate set includes a first pressing plate, a first nut and at least one first buckling rod; the first pressing plate has an outer surface and an inner surface; the first nut is opposite to the first pressing plate An output shaft is fixed on the inner surface of the first pressing plate, and has a first inner screw hole screwed with the first outer thread; the first locking rod is fastened on the first nut On the outer surface, toward the front edge of the first output shaft end, there is a first L-shaped elastic piece extending toward the surface of the first output shaft. The first L-shaped elastic piece corresponds to the diameter of the first output shaft and forms a the first snap-fit notch that is pressed against the first external thread and can bounce between the lines; The second pressing plate set includes a second pressing plate, a second nut and at least one second buckling rod; the second pressing plate has an outer surface and an inner surface; the second nut is opposite to the second pressing plate The output shaft is fixed on the inner surface of the second pressing plate, and has a second inner screw hole screwed with the second outer thread; the second buckling rod is fastened and arranged on the outer surface of the second nut , the front edge of the second output shaft end has a second L-shaped elastic piece extending toward the surface of the second output shaft. The second L-shaped elastic piece is corresponding to the diameter of the second output shaft. A second buckle slot that is locked on the second external thread and can bounce between the lines. According to the disc brake piston push-back tool described in claim 1, an accommodating groove is provided inside the output end of the operating handle to pivot the ratchet member and a ratchet member, and the ratchet member is In the accommodating slot, a pivoting hole is pivoted on the side edge of the ratchet member, and both ends of the pivoting hole have a pair of push switching parts extending out of the accommodating slot. One side between the switching parts is formed with a nose-shaped convex part, and the other side is opposite to the shape of the tooth gap of the ratchet member, and two convex claws are formed at a distance, and one side of the ratchet member is installed on the A spring in a long groove pushes a blocking member against a side surface of the nose-shaped convex portion, so that one of the two protruding claws is caught on the tooth gap of the ratchet member. According to the disc brake piston push-back tool described in claim 1, a polygonal assembly hole is formed in the center of the ratchet member, and between the first output shaft and the second output shaft of the output member, Relative to the polygonal assembly hole, a polygonal joint portion is formed, and the polygonal joint portion is assembled on the polygonal assembly hole, so that the output member is combined with the central position of the ratchet member. According to the disc brake piston push-back tool described in claim 1, the first pressure plate and the second pressure plate are respectively provided with a coupling hole relative to the first output shaft and the second output shaft, and The first nut and the second nut are respectively formed with a neck relative to the combining hole on the first pressing plate and the combining hole on the second pressing plate, and the necks of the first nut are tightened respectively. It is fitted and fixed on the combining hole of the first pressing plate, and the neck of the second nut is tightly fitted and fixed on the combining hole of the second pressing plate. According to the disc brake piston push-back tool described in claim 1, the first nut has an even-numbered polygonal surface, and on the polygonal surface, a pair of the first nut that matches the shape of the polygonal surface is butted and fixed. a buckling piece, so that the first L-shaped elastic piece of the pair of first buckling pieces is The first buckle notches are pressed against each other on the first external thread surface of the first output shaft. According to the disc brake piston push-back tool described in claim 5, wherein a groove is formed around the polygonal surface of the first nut, and the pair of first buckling rods are provided with more than one groove relative to the groove. Fasteners that snap into the groove. According to the disc brake piston push-back tool described in claim 5, the pair of first buckling rods are butted on the polygonal surface of the first nut, and the pair of first buckling rods are arranged on the end surface away from the butted position. A pair of notches are formed on the two sides of the first L-shaped elastic piece away from the end surface of the first L-shaped elastic piece. According to the disc brake piston push-back tool described in claim 1, the second nut has an even-numbered polygonal surface, and on the polygonal surface, a pair of the second nut that matches the shape of the polygonal surface is butted and fixed. The buckling member makes the second buckling grooves on the second L-shaped elastic pieces of the pair of second buckling members buckle against each other and press against the second external thread surface of the second output shaft. According to the disc brake piston push-back tool described in claim 8, wherein a groove is formed around the polygonal surface of the second nut, and the pair of second locking rods are provided with more than one groove relative to the groove. Fasteners that snap into the groove. According to the disc brake piston push-back tool described in claim 8, wherein the pair of second buckling rods are butted on the polygonal surface of the second nut, and the first and second bolts are arranged on the face away from the butted position. Two L-shaped elastic pieces, and a pair of notches are formed on both sides of the second L-shaped elastic pieces away from the end surface.

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