TW201630779A - Middle-pull semi-hydraulic brake caliper structure and assembling method thereof - Google Patents

Abstract

The present invention discloses a middle-pull semi-hydraulic brake caliper structure and an assembling method thereof. The middle-pull semi-hydraulic brake caliper structure at least comprises a body, a movable sleeve, a piston and a brake caliper, wherein the movable sleeve is provided with at least one circulating hole; the piston is movably arranged in the body and partially exposed therefrom and is plugged in the movable sleeve; the brake caliper is communicated with the body; and a first end plug is plugged outside the movable sleeve and is provided with a positioning hole. The assembling method at least comprises a step of threading, namely threading a brake cable into the piston and penetrating out of the exposed part of the piston; a step of clamping and fixing, namely, using two objects to respectively clamping and fixing the exposed part of the piston and the first end plug; a step of adjusting, namely using the object for clamping and fixing the first end plug to rotate the first end plug; and a step of positioning, namely transferring the positioning hole in the first end plug to at least one circulating hole of the movable sleeve for the purpose of positioning.

Description

Middle pull type semi-hydraulic brake caliper structure and assembly method thereof

The invention relates to the related field of bicycles, in particular to a medium-pull semi-hydraulic brake caliper structure and an assembly manner thereof.

According to the hydraulic brake device used by bicycles, it should be regarded as one of the most commonly used hydraulic devices. It is mainly equipped with a hydraulic brake driven by a driver's hand at the handshake, and is connected to the opposite wheel through a hydraulic pipe. When the knight presses the brake handlebar, the handle moves the piston relative to the piston in the main cylinder of the hydraulic brake to push the hydraulic oil in the main cylinder into the auxiliary cylinder of the brake caliper, so that the vice The brake piece at the cylinder advances toward the brake disc, and the brake piece is brought into contact with the brake disc on the hub, thereby causing a smashing action on the wheel.

However, the hydraulic brake must be placed adjacent to the brake handle, and there is no flexibility to adjust the position; and after the assembly is completed, it is not convenient to adjust the two 0.5mm holes.

The present invention provides a middle pull type semi-hydraulic brake caliper structure, which rotates the movable sleeve through the exposed outer convex ring, so that the movable sleeve is away from the end with the outer convex ring and can be separated from the first inner flange. And by adjusting the position of one of the two flow holes at any time, so that the pressure of the oil and air in the main oil cylinder does not affect the use of the brake; in addition, the two elastic pieces of the inner joint are plugged into the inner tapered portion. a convex ring between the two ends of the inner joint is abutted against the third inner flange adjacent to the fifth inner thread portion, and the two elastic pieces are pressed by the inner tapered portion to be fixed to pass through the second end plug, and the second The piston, the first piston and one end of the brake line at the two shrapnel form a middle pull structure; thereby moving the first piston through the brake line to adjust the oil pressure, and adjusting the first piston according to the user's needs s position.

Furthermore, when the brake line is locked, the piston (first piston) is positioned to ensure the flow hole (0.5mm hole) is open state, which can avoid the problem of lock line action or consumer operation error, which causes the flow hole (0.5mm hole) to be closed, which causes the brake function and performance failure.

The invention provides an assembly side of a medium-pull semi-hydraulic brake caliper structure The middle pull type semi-hydraulic brake caliper structure includes at least a body, a movable sleeve, a piston, and a brake caliper, the movable sleeve has at least one circulation hole, and the piston is movably disposed in the body And partially exposed, the piston plug is disposed in the movable sleeve, the brake caliper is in communication with the body, the first end plug is disposed outside the movable sleeve, and has a positioning hole, and the step of assembling is at least The method includes the steps of: threading a brake wire through the interior of the piston and penetrating the exposed portion of the piston; and clamping step: respectively clamping the exposed portion of the piston and the first end plug with two objects; adjusting step: clamping The object securing the first end plug rotates the first end plug; and the positioning step: adjusting the positioning hole of the first end plug to be positioned with the at least one flow hole of the movable sleeve.

The invention further provides a middle pull type semi-hydraulic brake caliper structure, which comprises at least one The main body has a main oil cylinder and a sub-cylinder, and the two ends of the main cylinder are respectively provided with a first internal thread portion and a second internal thread portion, and the auxiliary cylinder is disposed adjacent to one end of the first internal thread portion. The third internal thread portion is screwed to the third external thread portion of the one end cover, the main oil cylinder has a first inner flange and a second inner flange, the first inner flange An inner flange is adjacent to the first internal thread portion, the second inner flange is adjacent to the second internal thread portion, a predetermined position of the main cylinder is provided with a calibration hole, and can be sealed by a sealing member; a sleeve is disposed in the main oil cylinder of the body, and one end of the movable sleeve is convexly outwardly convexly provided with an outer convex ring, and the outer convex ring is exposed outside the main oil cylinder, adjacent to the convex The outer surface of the ring is provided with a first external thread portion, and the inner surface adjacent to the outer ring is provided with a fourth internal thread portion, and the first external thread portion is coupled to the first internal thread portion of the main cylinder Rotatingly adjustablely connected, the fourth internal threaded portion is coupled with a first a fourth external threaded portion of the plug is screwed, and the movable sleeve has oppositely disposed two flow holes, which are located between the two ends of the movable sleeve; a first piston has a mutual connection a large diameter section and a small diameter section, the large diameter section is disposed in the movable sleeve, the small diameter section is exposed outside the movable sleeve, and the large diameter section is connected with the small diameter section The connecting end is abutted against the first end plug, and a portion of the small diameter of the first piston that is away from the large diameter portion is provided with a fifth external thread portion, and the small diameter portion has the fifth external thread portion. The inner surface is an inner tapered portion which is tapered toward the outside, a fifth internal thread portion of the outer sleeve is screwed to the fifth external thread portion, and the outer sleeve is away from the fifth a third flange is disposed in one end of the internal thread portion, and two elastic pieces of an inner joint are plugged in the inner tapered portion, and an outer convex ring between the two ends of the inner joint is abutted on the first The three inner flanges are adjacent to the fifth internal thread portion, and the two elastic pieces are pressed by the inner tapered portion to fix through the second end plug, the second piston, and the first piston to the two elastic pieces One end of a brake line; a second piston having one end plugged in the large diameter section of the first piston away from one end of the small diameter section, and the other end is tied in the second inner portion of the main cylinder a second external thread portion in the flange and adjacent to the second internal thread portion, and a second external thread portion of the second end plug is rotatably adjusted to the second internal thread portion of the main cylinder And abutting at an end of the second piston adjacent to the second internal thread portion; and a brake caliper communicating with the body; wherein an elastic member is sleeved outside the second piston, and two of the elastic members The end portions respectively abut the large diameter section of the first piston and the first inner flange of the main cylinder.

The invention also provides a middle pull type semi-hydraulic brake caliper structure, which comprises at least one The main body has a main oil cylinder and a sub-cylinder, and the two ends of the main cylinder are respectively provided with a first internal thread portion and a second internal thread portion, and the auxiliary cylinder is disposed adjacent to one end of the first internal thread portion. The third internal thread portion is screwed to the third external thread portion of the one end cover, the main oil cylinder has a first inner flange and a second inner flange, the first inner flange An inner flange is adjacent to the first internal thread portion, the second inner flange is adjacent to the second internal thread portion, a predetermined position of the main cylinder is provided with a calibration hole, and can be sealed by a sealing member; a sleeve is disposed in the main oil cylinder of the body, and one end of the movable sleeve is convexly outwardly convexly provided with an outer convex ring, and the outer convex ring is exposed outside the main oil cylinder, adjacent to the convex The outer surface of the ring is provided with a first external thread portion, and the inner surface adjacent to the outer ring is provided with a fourth internal thread portion, and the first external thread portion is coupled to the first internal thread portion of the main cylinder Rotatingly adjustablely connected, the fourth internal threaded portion is coupled with a first a fourth external threaded portion of the plug is screwed, and the movable sleeve has oppositely disposed two flow holes, which are located between the two ends of the movable sleeve; a first piston has a mutual connection a large diameter section and a small diameter section, the large diameter section is disposed in the movable sleeve, the small diameter section is exposed outside the movable sleeve, and the large diameter section is connected with the small diameter section The connecting end is abutted against the first end plug, and a portion of the small diameter of the first piston that is away from the large diameter portion is provided with a fifth external thread portion, and the small diameter portion has the fifth external thread portion. The inner surface is an inner tapered portion which is tapered toward the outside, a fifth internal thread portion of the outer sleeve is screwed to the fifth external thread portion, and the outer sleeve is away from the fifth a third flange is disposed in one end of the internal threaded portion, and a fourth flange is disposed outside the one end of the fifth internal threaded portion, and two elastic pieces of an inner joint are disposed in the inner tapered portion. a portion of the outer ring between the two ends of the inner member is adjacent to the fifth inner thread portion, and the two elastic pieces are pressed by the inner tapered portion to be fixedly passed through. The second end plug, the second piston, the first piston and one end of a brake line at the two elastic pieces; and a second piston, one end of which is plugged in the large diameter section of the first piston away from the One end of the small diameter section, the other end of the plug is in the second inner flange of the main cylinder and adjacent to the second internal thread portion, and a second end plug The external thread portion is rotatably and rotatably coupled to the second internal thread portion of the main cylinder and abuts against an end of the second piston adjacent to the second internal thread portion; and a brake caliper is connected to the body Wherein, an elastic member is sleeved outside the small diameter portion of the first piston, and two ends of the elastic member respectively abut against the fourth flange and an end of the main cylinder adjacent to the first internal thread portion.

The invention further provides a middle pull type semi-hydraulic brake caliper structure, which comprises at least one The main body has a main oil cylinder and a sub-cylinder, and the two ends of the main cylinder are respectively provided with a first internal thread portion and a second internal thread portion, and the auxiliary cylinder is disposed adjacent to one end of the first internal thread portion. The third internal thread portion is screwed to the third external thread portion of the one end cover, the main oil cylinder has a first inner flange and a second inner flange, the first inner flange An inner flange is adjacent to the first internal thread portion, the second inner flange is adjacent to the second internal thread portion, a predetermined position of the main cylinder is provided with a calibration hole, and can be sealed by a sealing member; a sleeve is disposed in the main oil cylinder of the body, and one end of the movable sleeve is convexly outwardly convexly provided with an outer convex ring, and the outer convex ring is exposed outside the main oil cylinder, adjacent to the convex The outer surface of the ring is provided with a first external thread portion, and the inner surface adjacent to the outer ring is provided with a fourth internal thread portion, and the first external thread portion is coupled to the first internal thread portion of the main cylinder Rotatingly adjustablely connected, the fourth internal threaded portion is coupled with a first a fourth external threaded portion of the plug is screwed, and the movable sleeve has oppositely disposed two flow holes, which are located between the two ends of the movable sleeve; a first piston has a mutual connection a large diameter section and a small diameter section, the large diameter section is worn in the living In the movable sleeve, the small diameter section is exposed outside the movable sleeve, and the connection between the large diameter section and the small diameter section is abutted against the first end plug, and the small diameter section of the first piston One end away from the large diameter section is provided with a fifth external thread portion, and the small diameter section has an inner surface of the fifth external thread portion which is an inner tapered portion which is tapered outwardly, and an outer portion a fifth internal thread portion of the sleeve is screwed to the fifth external thread portion, and a third flange is disposed in an end of the outer sleeve away from the fifth female thread portion, the outer barrel is adjacent to the fifth A fourth flange is disposed outside one end of the internal threaded portion, and two elastic pieces of an inner joint are plugged in the inner tapered portion, and an outer convex ring between the two ends of the inner joint is abutted against the third The inner flange is adjacent to the fifth internal thread portion, and the two elastic pieces are pressed by the inner tapered portion to fix through the second end plug, the second piston, and the first piston to the two elastic pieces. One end of a brake line; a second piston having one end plugged in the large diameter section of the first piston away from one end of the small diameter section, and the other end is tied a second internal threaded portion of the second end of the main cylinder and a second externally threaded portion of the second end of the main cylinder are rotatably and slidably coupled to the second internal threaded portion of the main cylinder And abutting at an end of the second piston adjacent to the second internal thread portion; and a brake caliper communicating with the body; wherein an elastic member is sleeved outside the second piston, and two of the elastic members The end portions respectively abut the large diameter section of the first piston and the first inner flange of the main cylinder; another elastic element is sleeved outside the small diameter section of the first piston, and both ends of the elastic element The fourth flange and the end of the main cylinder adjacent to the first internal thread portion are respectively abutted.

In some embodiments, the third internal thread portion and the third external thread portion are Bonding is achieved through a sealing element.

1‧‧‧Chinese-style semi-hydraulic brake caliper structure

2‧‧‧ Ontology

21‧‧‧Main cylinder

211‧‧‧First internal thread

212‧‧‧Second internal thread

213‧‧‧First inner flange

214‧‧‧Second inner flange

22‧‧‧Sub-cylinder

221‧‧‧ Third internal thread

23‧‧‧End cover

231‧‧‧ Third external thread

3‧‧‧ Activity sleeve

31‧‧‧Outer ring

32‧‧‧First external thread

33‧‧‧Fourth internal thread

34‧‧‧Circulation holes

35‧‧‧Circulation holes

36‧‧‧ concave ring groove

37‧‧‧O-ring

4‧‧‧First Piston

40‧‧‧Flexible components

41‧‧‧ Large diameter section

42‧‧‧Small path

43‧‧‧ concave ring groove

44‧‧‧V-ring

45‧‧‧ Fifth external thread

46‧‧‧Inner cone

5‧‧‧second piston

50‧‧‧Flexible components

6‧‧‧First end plug

61‧‧‧Four external thread

62‧‧‧Positioning holes

7‧‧‧Second end plug

71‧‧‧Second external thread

8‧‧‧Outer sleeve

81‧‧‧ Fifth internal thread

82‧‧‧ third flange

83‧‧‧fourth flange

9‧‧‧Interconnects

91‧‧‧Shrap

92‧‧‧Outer ring

10‧‧‧ brake line

100‧‧‧ brake calipers

200‧‧‧ objects

Step S1~S5‧‧‧ Assembly method according to the invention

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view showing a first embodiment of a pull type semi-hydraulic brake caliper of the present invention.

Fig. 2 is a perspective view showing the appearance of the first embodiment of the pull type semi-hydraulic brake caliper of the present invention.

Figure 3 is a cross-sectional view showing the first embodiment of the pull-type semi-hydraulic brake caliper of the present invention.

Fig. 4 is a cross-sectional view showing a second embodiment of the structure of the pull type semi-hydraulic brake caliper of the present invention.

Figure 5 is a view showing the structure of the pull type semi-hydraulic brake caliper of the present invention. A schematic cross-sectional view of the embodiment.

Figure 6 is a view showing the assembly side of the pull type semi-hydraulic brake caliper structure of the present invention. Flow chart.

Please refer to the first to fifth figures, the middle pull type semi-hydraulic pressure of this embodiment. The brake caliper structure 1 can include a body 2, a movable sleeve 3, a first piston 4, and a second piston 5.

The main body 2 has a main oil cylinder 21 and a sub-cylinder 22, and the main cylinder 2 A first internal thread portion 211 and a second internal thread portion 212 are respectively disposed at two ends of the first cylinder portion 211, and a third internal thread portion 221 is disposed at an end of the auxiliary cylinder 22 adjacent to the first internal thread portion 211, and the third internal thread portion is provided. The second external thread portion 231 of the one end cover 23 is screwed to each other, and the third female thread portion 221 and the third external thread portion 231 are coupled through a sealing member (not shown), the main cylinder The 21 series has a first inner flange 213 and a second inner flange 214. The first inner flange 213 is adjacent to the first female thread portion 211, and the second inner flange 214 is adjacent to the second female thread portion 212.

Furthermore, the body 2 can be in communication with a brake caliper 100.

The movable sleeve 3 is disposed in the main sump 21 of the body 2, and the movable sleeve 3 One end of the first end is convexly outwardly provided with an outer convex ring 31. The outer convex ring 31 is exposed outside the main oil cylinder 21, and the outer surface adjacent to the outer convex ring 31 is provided with a first external thread portion 32 adjacent to the outer convex ring. The inner surface of the portion 31 is provided with a fourth internal thread portion 33. The first external thread portion 32 is rotatably and rotatably connected to the first internal thread portion 211 of the main cylinder 21, and the adjustment stroke can be about 1 mm. The internal thread portion 33 is screwed into a fourth external thread portion 61 of a first end plug 6, and the movable sleeve 3 has two spaced holes (such as 0.5 mm holes) 34, 35 spaced apart. Between the two ends of the movable sleeve 3, the first end plug 6 has a positioning hole 62.

Wherein the movable sleeve 3 is adjacent to the first external thread portion 32 and away from the first outer portion Each of the threaded portions 32 has a concave ring groove 36, and each of the concave ring grooves 36 is sleeved by an O-ring 37.

The first piston 4 has a large diameter section 41 and a small diameter section 4 connected to each other 2, the large diameter section 41 is worn in the movable sleeve 3, the small diameter section 42 is exposed outside the movable sleeve 3, and the joint of the large diameter section 41 and the small diameter section 42 is abutted against the first end plug. 6.

Wherein, the two ends of the large diameter section 41 of the first piston 4 respectively have a concave ring groove 4 3. Each of the concave ring grooves 43 is respectively provided with a V-shaped ring 44.

One end of the second piston 5 is plugged in the large diameter section 41 of the first piston 4 away from In one end of the small diameter section 42, the other end of the second piston 5 is plugged into the second inner flange 214 of the main cylinder 21 and adjacent to the second internal thread portion 212, and a second end plug 7 is second. The male screw portion 71 is rotatably and screw-engaged with the second female screw portion 212 of the master cylinder 21 and abuts against one end of the second piston 5 adjacent to the second female screw portion 212.

With the above structure, the movable sleeve 3 is rotated through the exposed outer convex ring 31, Keeping the movable sleeve 3 away from the end having the outer convex ring 31 can be away from or can be abutted against the first inner flange 213, and thereby adjusting the position of one of the two flow holes 34, 35 to make the oil in the main oil cylinder 3 The pressure of the liquid and air does not affect the use of the brakes.

Furthermore, the small diameter section 42 of the first piston 4 is disposed away from one end of the large diameter section 41. A fifth external thread portion 45 is disposed, and the inner surface of the small diameter portion 42 having the fifth external thread portion 45 is an inner tapered portion 46 which is tapered outwardly, and an outer sleeve portion 8 The fifth internal thread portion 81 is screwed to the fifth external thread portion 45, and a third flange 82 is disposed in an end of the outer sleeve 8 away from the fifth internal thread portion 81, and the outer sleeve 8 is adjacent to the fifth internal thread portion. A fourth flange 83 is disposed outside one end of the 81. The two elastic pieces 91 of the inner connecting member 9 are plugged into the inner tapered portion 46, and an outer convex ring 92 between the two ends of the inner connecting member 9 is axially abutted. The third inner flange 82 is adjacent to the fifth internal thread portion 81, and the two elastic pieces 91 are pressed by the inner tapered portion 46 to be fixed to pass through the second end plug 7, the second piston 5, the first piston 4, and the two elastic pieces. One end of a brake wire 10 at 91 forms a mid-pull structure.

Wherein, an elastic member 50 is sleeved outside the second piston 5, and the elastic member Both ends of the 50 can be respectively abutted against the large diameter section 41 of the first piston 4 and the first inner flange 213 of the main cylinder 21, and/or the other elastic element 40 is sleeved outside the small diameter section 42 of the first piston 4. The two ends of the elastic member 40 are respectively abutted against the fourth flange 83 and the end of the main cylinder adjacent to the first internal thread portion; the small diameter portion of the first piston is clamped and rotated by an object, thereby driving the activity Moving the sleeve and adjusting one of the two flow holes to be aligned with the calibration hole before sealing with the sealing member; that is, the structure having the elastic members 40 and 50 at the same time as shown in FIGS. 1 to 3 It is shown that the structure having the elastic member 50 alone is as shown in Fig. 4, and the structure having the elastic member 40 alone is as shown in Fig. 5.

The first piston 4 is moved through the brake wire 10 to adjust the oil pressure. That is, when the brake wire 10 is tightened, the first piston 4 acts to push the oil into the brake caliper 100 to perform the brake of the caliper clamping, or when the brake wire 10 is released, the oil is passed through the elastic member 50 and/or The elastic force of the elastic member 40 resets the first piston 4 and is sucked back into the body 2, thereby returning the brake caliper 100 to the unbraked state.

In addition, by rotating the movable sleeve 3, it can be adjusted according to the needs of the user. The position of the first piston 4.

Moreover, the brake wire 10, the main cylinder 21, the first piston 4, and the second piston The 5 Series can be set coaxially.

Please refer to FIG. 6 , the group of the pull type semi-hydraulic brake caliper structure of the present invention. The steps of the loading method include the following.

Threading step S1: passing the brake wire 10 through the inside of the piston (first piston 4) The exposed portion of the piston (first piston 4) is worn out (small diameter section 42).

Clamping step S2: clamping the piston with the two objects 200 (first piston 4) The exposed portion (small diameter section 42) and the first end plug 6.

Adjustment step S3: rotating the first end plug 6 with one of the objects 200.

Positioning step S4: transferring the positioning hole 62 of the first end plug 6 to the movable sleeve The flow holes 34 and 35 of the barrel 3 are positioned.

Of course, it may further include the removing step S5: removing each object 200 from the piston (the first The exposed portion (small diameter section 42) of a piston 4) and the first end plug 6 are removed. The object 200 can be a tool such as a clamp or a hex wrench, but is not limited thereto.

Therefore, when the brake wire 10 is locked, the piston (first piston 4) is positioned to ensure flow. The through holes 34 and 35 (0.5 mm holes) are open to avoid the problem of the lock line action or the consumer's operation error, which causes the flow holes 34 and 35 (0.5 mm holes) to be closed, thereby causing the brake function and performance failure.

While the foregoing is directed to the various embodiments of the present invention, further or further embodiments of the present invention may be devised without departing from the basic scope thereof, and the basic scope thereof is defined by the following claims. Although the present invention has been explained in connection with the preferred embodiments, it is not intended to limit the invention. It should be noted that many other similar embodiments can be constructed in accordance with the teachings of the present invention, which are within the scope of the present invention.

Step S1~S5‧‧‧ Assembly method according to the invention

Claims (8)

The assembly method of a middle pull type semi-hydraulic brake caliper structure, the middle pull type semi-hydraulic brake caliper structure comprises at least a body, a movable sleeve, a first end plug, a piston, and a brake caliper, the activity The sleeve has at least one flow hole, the piston is movably disposed in the body, and is partially exposed, the piston plug is disposed in the movable sleeve, the brake caliper is in communication with the body, and the first end plug is disposed at The movable sleeve has a positioning hole, and the step of assembling comprises at least: a threading step: passing a brake wire through the inside of the piston and penetrating the exposed portion of the piston; and clamping step: respectively clamping the two objects Fixing the exposed portion of the piston and the first end plug; adjusting step: rotating the first end plug with the object clamping the first end plug; and positioning step: adjusting the positioning hole of the first end plug to Positioning with the at least one flow aperture of the movable sleeve. The utility model relates to a middle pull type semi-hydraulic brake caliper structure, which comprises at least a main body, a main oil cylinder and a sub-cylinder connected to each other, and a first internal thread portion and a second internal thread portion are respectively arranged at two ends of the main oil cylinder a third internal thread portion is disposed adjacent to one end of the first internal thread portion, and the third internal thread portion is screwed to a third external thread portion of the end cap. The main cylinder has a a first inner flange and a second inner flange, the first inner flange is adjacent to the first internal thread portion, the second inner flange is adjacent to the second internal thread portion; a movable sleeve is threaded Provided in the main cylinder of the body, one end of the movable sleeve protrudes radially outwardly with an outer convex ring exposed outside the main cylinder adjacent to the outer surface of the outer convex ring a first external thread portion is disposed, and a fourth internal thread portion is disposed adjacent to the inner surface of the outer collar, the first external thread portion being rotatably and movably connected to the first female thread portion of the main cylinder The fourth internal thread portion and a fourth external thread portion of the first end plug The movable sleeve is provided with two opposite flow holes, which are located between the two ends of the movable sleeve; a first piston has a large diameter section and a small diameter section which are connected to each other The large diameter section is disposed in the movable sleeve, the small diameter section is exposed outside the movable sleeve, and the connection between the large diameter section and the small diameter section is topped against the first end plug a fifth external thread portion is disposed at one end of the small diameter section of the first piston away from the large diameter section, and the inner surface of the small diameter section having the fifth external thread portion is a tapered outer diameter a fifth inner threaded portion of the outer sleeve is screwed to the fifth outer threaded portion, and a third portion of the outer sleeve is disposed away from an end of the fifth female threaded portion a flange, a two elastic piece of an inner joint is inserted in the inner tapered portion, and an outer convex ring between the two ends of the inner joint is abutted against the fifth inner thread portion adjacent to the fifth inner thread portion The two elastic pieces are pressed by the inner tapered portion to fix a brake that passes through the second end plug, the second piston, and the first piston to the two elastic pieces. One end of the second piston, one end of the first piston is inserted in one end of the first piston away from one end of the small diameter section, and the other end is plugged into the second inner flange of the main cylinder and Adjacent to the second internal thread portion, a second external thread portion of a second end plug is rotatably and slidably coupled to the second internal thread portion of the main cylinder, and is adjacent to the second piston. One end of the second internal thread portion; and a brake caliper connected to the body; wherein an elastic member is sleeved outside the second piston, and the two ends of the elastic member are respectively abutted against the first piston a large diameter section and the first inner flange of the main cylinder. The utility model relates to a middle pull type semi-hydraulic brake caliper structure, which comprises at least a main body, a main oil cylinder and a sub-cylinder connected to each other, and a first internal thread portion and a second internal thread portion are respectively arranged at two ends of the main oil cylinder a third internal thread portion is disposed adjacent to one end of the first internal thread portion, and the third internal thread portion is screwed to a third external thread portion of the end cap. The main cylinder has a a first inner flange and a second inner flange, the first inner flange Adjacent to the first internal thread portion, the second inner flange is adjacent to the second internal thread portion, a predetermined position of the main cylinder is provided with a calibration hole, and can be sealed by a sealing element; The outer sleeve of the movable sleeve is radially outwardly convexly provided with an outer convex ring, and the outer convex ring is exposed outside the main oil cylinder, adjacent to the outer convex ring. The surface is provided with a first external thread portion, and a fourth internal thread portion is disposed adjacent to the inner surface of the outer collar, the first external thread portion being rotatably adjustable with the first internal thread portion of the main cylinder Connected, the fourth female threaded portion is screwed into a fourth external threaded portion of a first end plug, and the movable sleeve has oppositely disposed two flow holes, which are tied at both ends of the movable sleeve a first piston having a large diameter section and a small diameter section connected to each other, the large diameter section being disposed in the movable sleeve, the small diameter section being exposed outside the movable sleeve And the connection between the large diameter segment and the small diameter segment is abutted against the first end plug, the first One end of the small diameter section of the plug away from the large diameter section is provided with a fifth external thread portion, and the small diameter section has an inner surface of the fifth external thread portion which is tapered inside the outer diameter. a fifth internal thread portion of an outer sleeve is screwed to the fifth external thread portion, and a third flange is disposed in an end of the outer sleeve away from the fifth female thread portion. A fourth flange is disposed outside the one end of the outer sleeve adjacent to the fifth female threaded portion, and two elastic pieces of an inner joint are disposed in the inner tapered portion, and an outer convex ring between the two ends of the inner joint member Abutting against the third inner flange adjacent to the fifth internal thread portion, the two elastic pieces being pressed by the inner tapered portion to fix through the second end plug, the second piston, the first piston And one end of a brake line at the two elastic pieces; a second piston having one end plugged in the large diameter section of the first piston away from one end of the small diameter section, and the other end is tied to the main piston a second internal thread portion of the second inner flange of the cylinder and adjacent to the second internal thread portion, and a second external thread portion of a second end plug is coupled to the second portion of the main cylinder Rotatably adjustably threaded portion screwed, and against the top of the piston adjacent the second end of the second internally threaded portion; and a brake caliper, and the body-based communication; Wherein, an elastic member is sleeved outside the small diameter portion of the first piston, and two ends of the elastic member respectively abut against the fourth flange and an end of the main cylinder adjacent to the first internal thread portion. The utility model relates to a middle pull type semi-hydraulic brake caliper structure, which comprises at least a main body, a main oil cylinder and a sub-cylinder connected to each other, and a first internal thread portion and a second internal thread portion are respectively arranged at two ends of the main oil cylinder a third internal thread portion is disposed adjacent to one end of the first internal thread portion, and the third internal thread portion is screwed to a third external thread portion of the end cap. The main cylinder has a a first inner flange and a second inner flange, the first inner flange being adjacent to the first internal thread portion, the second inner flange being adjacent to the second internal thread portion, a predetermined position of the main cylinder a calibration hole is disposed, and can be sealed by a sealing member; a movable sleeve is disposed in the main cylinder of the body, and one end of the movable sleeve is convexly outwardly provided with an outer convex ring, The outer ring is exposed outside the main cylinder, and the outer surface adjacent to the outer ring is provided with a first external thread portion, and the inner surface adjacent to the outer ring is provided with a fourth internal thread portion, the first An external thread portion and the first internal thread portion of the main cylinder Rotatingly connected, the fourth female threaded portion is screwedly coupled to a fourth external threaded portion of a first end plug, and the movable sleeve has oppositely disposed two flow holes, and is positioned in the movable sleeve Between the two ends; a first piston having a large diameter section and a small diameter section connected to each other, the large diameter section being disposed in the movable sleeve, the small diameter section being exposed in the movable sleeve Outside the cylinder, the connection between the large diameter section and the small diameter section is abutted against the first end plug, and a fifth external thread portion is disposed at an end of the small diameter section of the first piston away from the large diameter section. And the inner diameter surface of the small diameter portion having the fifth external thread portion is an inner tapered portion which is tapered outwardly, and a fifth internal thread portion of the outer sleeve is coupled to the fifth outer portion The threaded portion is screwed, and a third flange is disposed in an end of the outer sleeve away from the fifth female threaded portion, and a fourth flange is disposed outside the one end of the outer tubular portion adjacent to the fifth female threaded portion. The two shrapnels of the connector are plugged in In the inner tapered portion, an outer convex ring between the two ends of the inner joint is abutted against the third inner flange adjacent to the fifth female thread portion, and the two elastic pieces are pressed by the inner tapered portion. Fixing the second end plug, the second piston, and the first piston to one end of a brake line at the two elastic pieces; and a second piston having one end plugged at the large end of the first piston The diameter section is away from one end of the small diameter section, the other end is plugged into the second inner flange of the main cylinder and adjacent to the second internal thread portion, and a second external thread portion of a second end plug The second internal thread portion of the main cylinder is rotatably and screwed to the end of the second piston adjacent to the second internal thread portion; and a brake caliper is connected to the body; wherein An elastic member is sleeved outside the second piston, and two ends of the elastic member respectively abut against the large diameter section of the first piston and the first inner flange of the main cylinder; and another elastic component sleeve Outside the small diameter section of the first piston, two ends of the elastic element respectively abut the fourth flange and the main cylinder is adjacent to the An internally threaded end portion. The medium-pull semi-hydraulic brake caliper structure according to at least one of the above-mentioned claims, wherein the movable sleeve is adjacent to the first external thread portion and away from the first external thread portion. Each of the departments has a concave ring groove, and each of the concave ring grooves is respectively provided with an O-ring. The medium-pull semi-hydraulic brake caliper structure according to at least one of the second to fourth aspects of the patent application, wherein the large-diameter section of the first piston has a concave ring groove at each end, respectively The recessed ring slots are respectively provided for a V-ring. The medium-pull half-hydraulic brake caliper structure according to the second aspect of the invention, wherein the small-diameter section of the first piston is provided with a fifth external thread portion away from the end of the large diameter section, and the small The inner surface of the diameter portion having the fifth external thread portion is an inner tapered portion which is tapered outwardly, and a fifth internal thread portion of the outer sleeve is screwed to the fifth external thread portion. And the outer sleeve is away from the first a third flange is disposed in one end of the five internal thread portion, and two elastic pieces of an inner joint are plugged in the inner tapered portion, and an outer convex ring between the two ends of the inner joint is abutted thereon a third inner flange is adjacent to the fifth internal thread portion, and the two elastic pieces are pressed by the inner tapered portion to fix through the second end plug, the second piston, and the first piston to the two elastic pieces One end of a brake line. The medium-pull semi-hydraulic brake caliper structure according to at least one of the above-mentioned claims, wherein the third internal thread portion and the third external thread portion are permeable to a sealing member. Combine.