CN103448853B - Thin double-side disc brake - Google Patents

Abstract

The invention discloses a thin double-sided disc brake. The double-arm pull bar (1) has two left and right arms, an elastic feel adjustment device is arranged between the two arms, a boss (14) is arranged on the top of the double-arm pull bar (1); the middle of the right push rod (2a) is moved by the push rod ( 5a) Sleeve insertion, one end of the right push rod (2a) has an annular groove for installing a jumper (8a); the neck of the movable push rod (5a) has a through hole, and an elastic steel wire (7a) is inserted in the hole; the jumper ( 8a) The middle is stuck in the annular groove of the right push rod (2a), and the whole snap ring (8a) is embedded in the inside of the knob (20); the inside of the edge flange of the knob (20) is a groove, and the knob (20) The middle part drives the compensation screw (6a) to rotate. The thin double-sided disc brake of the present invention can achieve simultaneous action and clamping on both sides, and has a relatively thin body shape.

Description

Thin double-sided disc brake

technical field

The invention relates to important components of bicycles and electric bicycles, in particular to a cable mechanical double-sided clamping disc brake.

Background technique

Bicycles and electric bicycles are a huge amount of transportation, walking and fitness tools in the world. In order to adjust the speed and brake, brakes are an essential part. At present, the commonly used brakes for bicycles and electric bicycles use mechanical cable brakes. Generally, one-way clamping disc brakes are used. The friction plates of the small caliper body of the one-way clamping disc brake are fixed. One side of the friction plate squeezes the disc to brake. This kind of disc brake is difficult to adjust during installation, and the installation is troublesome. When braking, the disc is subjected to force on one side and is easily deformed, which affects the braking effect. The hydraulic disc brake is a double-sided clamping brake, which has good effect and is easy to install. However, it requires high precision, high manufacturing cost, easy oil leakage during use, and difficult maintenance. Chinese utility model patent ZL201120242634.X, whose name is: double-sided clamping bicycle disc brakes, discloses a bicycle mechanical disc brake with double-sided simultaneous clamping, which basically solves the problem of one-way clamping mechanical disc brakes The shortcomings of the disc overcome the problem of single-sided force, easy deformation, and affecting the braking effect. However, this utility model patent still uses an indirect method to achieve simultaneous clamping on both sides, and the two driving devices are mounted on the same On the one hand, through the follow-up displacement of the main brake device, both sides can be clamped simultaneously. The disadvantages of this method are as follows: if the two drive devices are installed on the same side, the volume of the side will be too large and the height will be too high, which is not conducive to miniaturization and light weight.

Contents of the invention

In view of the defects in the above-mentioned prior art, the purpose of the thin double-sided disc brake of the present invention is not only to provide a direct double-sided clamping, easy to install double-sided simultaneous action clamping disc brake, but also to make it thinner and lighter. Quantify.

The technical solution to realize the present invention is as follows: this is a thin double-sided disc brake, which includes a double-arm pull rod, a right push rod, a movable push rod inserted on the right push rod, a small pliers body, a snap ring and a knob, It is characterized in that: the double-arm pull rod has two left and right arms, there is an elastic feel adjustment device between the two arms, a non-circular through hole is formed at the end of each arm, and the top of the double-arm pull rod is folded or passed through Press welding to make a boss; the middle of the right push rod is inserted by the movable push rod, and the end of the smaller diameter of the right push rod has an annular groove for installing a circlip; the neck of the movable push rod has a consistent perforated, and an elastic steel wire is inserted in the hole; the small pliers body has a threaded terminal post with a pull wire; In the shape of a notch, the entire circlip is embedded inside the knob; the inside of the flange of the knob is a circular groove, or a groove corresponding to the shape of the edge of the circlip, and the middle part of the knob drives the compensation screw to rotate . The double-arm pull rod has elasticity, and is in a figure-eight shape in a natural state. There are convex or concave reinforcing ribs formed by stamping on the two arms. There are card slots on the side of the boss. There are 2 to 4 inclined spiral grooves on the right push rod. The deepest shape of the spiral groove is a semicircular groove with a part cut off by a curved surface or a plane. When the steel ball is at the deepest point, a contact The part is on a curved surface or a plane, and the other contact part is on the inclined surface of the spiral groove. The bottom of the steel ball does not touch the spiral groove; there is a non-circular columnar section at the end of the smaller diameter of the right ejector rod, This columnar section is clearance fit with the non-circular through hole of the double-arm tie rod. The elastic feel adjustment device between the two arms of the double-arm pull rod is a combination of screws and nuts propped between the two arms, and the elastic force of the double-arm pull rod is adjusted by turning the nut; or a herringbone under pressure Rod, by changing the opening and closing of the herringbone rod to adjust the force between the two arms to adjust the elastic feel of the brake handle. The knob is made of plastic, nylon or metal, and drives the circlip to rotate together when turning; or the circlip is fixed, and the knob alone drives the compensation screw to rotate.

Both sides of this thin-type double-sided disc brake can be adjusted to compensate for the wear of the friction plate, and the distance of the friction plate can be adjusted by manually rotating the knob; The opening elastic force achieves the purpose of resetting the double-arm pull rod. The elastic feel adjustment device between the two arms can adjust the elastic feel of the brake handle; the opening elastic force of the double-arm pull rod itself is also the pressure on the gasket and the retaining spring. This pressure prevents the retaining spring, The rotation of the knob and the compensating screw prevents the retraction of the movable ejector rod under force; the special-shaped circlip first acts as a common circlip to prevent the two-arm pull rod from falling off; the second is to form a manual rotation combination with the knob to adjust the friction At the same time, it prevents the knob from falling off; the left and right sides of this thin double-sided disc brake are symmetrical except for the manual knob combination part, and the shapes of the parts on both sides are basically the same.

The beneficial effect of the present invention is that, compared with the currently used double-sided clamping bicycle disc brakes, the height and volume of the disc brakes are reduced, and the average total height is reduced by about 19% after measurement, correspondingly reducing weight and saving raw materials.

Description of drawings

The following is a description of the drawings:

Fig. 1 is a cross-sectional structure diagram of a specific embodiment of the thin double-sided disc brake of the present invention.

Fig. 2 is a cross-sectional view of another angle of a specific embodiment of the thin double-sided disc brake of the present invention.

Fig. 3 is a front view of the thin double-sided disc brake of the present invention.

Fig. 4, Fig. 5 and Fig. 6 are three schematic perspective views of the double-arm pull rod of the thin double-sided disc brake of the present invention.

Fig. 7, Fig. 8 and Fig. 9 are comparison diagrams of the sectional structure diagram of the inclined spiral groove adopted in the thin double-sided disc brake of the present invention and the conventional spiral groove.

Fig. 10, Fig. 11 and Fig. 12 are structural diagrams of the right ejector rod of the thin double-sided disc brake of the present invention.

Fig. 13 is a structural diagram of a method using a herringbone rod for the elastic feel adjustment device.

Figure 14 and Figure 15 are the relationship diagrams of the three parts of the manual knob combination part.

Figure 16 and Figure 17 are perspective views of the movable push rod.

detailed description

The present invention will be further described below in conjunction with implementation.

As shown in FIG. 1 , it is a cross-sectional structure diagram of a specific embodiment of the thin double-sided disc brake of the present invention. For the convenience of description, the "left" and "right" referred to below are consistent with the left and right directions of the drawings themselves. When the brake handle is tightened to drive the double-arm pull rod 1 to rotate, the right arm of the double-arm pull rod 1 drives the right push rod 2a to rotate, and the right push rod 2a and the right push rod cover 4a form a bead plate pair. With the rotation of the right push rod 2a When the steel ball 3a rotates in the inclined spiral groove, it pushes the right push rod 2a, the movable push rod 5a and the right friction plate 21a to advance to the left; The rod cover 4b forms a bead plate, and the left steel ball 3b rotates in the inclined spiral groove, which pushes the left push rod 2b, the left movable push rod 5b and the left friction plate 21b to move to the right, thus achieving double-sided simultaneous actuation Clamp. Refer to Fig. 2 for the positions of the steel ball 3a and the left steel ball 3b.

Both sides of this thin double-sided disc brake can be adjusted to compensate for the wear of the friction plate, and the distance of the friction plate can be adjusted by manually rotating the knob 20 to drive the compensation screw 6a; this thin double-sided disc brake saves the need for reset in order to reduce the height The spring uses the opening elastic force of the double-arm pull rod 1 itself to achieve the purpose of resetting the double-arm pull rod 1. The elastic feel adjustment device between the two arms is composed of an adjustment screw 9 and an adjustment nut 10. Turning the adjustment nut 10 can adjust the brake handle. Elastic feel; the opening elastic force of the double-arm pull rod 1 itself also has pressure on the jumper 8a through the gasket 19, and this pressure prevents the rotation of the jumper 8a, the knob 20 and the compensating screw 6a, and prevents the movable push rod 5a from shrinking under force; The special shape of the circlip 8a is to play the role of a common circlip, and the second is to form a manual rotation combination with the knob 20 to adjust the distance of the friction plate and prevent the knob 20 from falling off; The combination part is symmetrical on the left and right sides, and the parts on both sides have basically the same shape; the large pliers body 15 and the small pliers body 16 are fixed together by screws, and the very special point is that the pull wire terminal is placed on the small pliers body 16; The function of the left compensating screw 6b on the left is the same as that of the compensating screw 6a; the left retaining spring 8b on the left only plays the role of a common retaining spring.

Fig. 2 is a cross-sectional structure view from another angle of a specific embodiment of the thin double-sided disc brake of the present invention, showing the positions of several parts more clearly.

Fig. 3 is a front view of the thin double-sided disc brake of the present invention.

Fig. 4, Fig. 5 and Fig. 6 are three perspective views of the dual-arm tie rod 1 of the thin double-sided disc brake of the present invention.

Fig. 7, Fig. 8 and Fig. 9 are comparison diagrams of the sectional structure diagram of the inclined spiral groove adopted in the thin double-sided disc brake of the present invention and the conventional spiral groove. Fig. 8 is a cross-sectional structure diagram of the inclined spiral groove used in the thin double-sided disc brake of the present invention. The deepest shape of the spiral groove is a semi-spherical groove cut off by a curved surface or a plane 17. There is a space under the steel ball Yes, the bottom of the steel ball does not touch the spiral groove, which can avoid the virtual position of the tie rod. Fig. 7 is a sectional view of a conventional groove.

Figure 10, Figure 11 and Figure 12 are the structural diagrams of the right push rod 2a of the thin double-sided disc brake of the present invention, the end of the right push rod 2a with a smaller diameter has an annular groove for installing the snap spring 8a and the position for installing the gasket 19 And install the position of double-arm tie rod 1.

Fig. 13 is a structural diagram of a thin-type double-sided disc brake elastic feel adjustment device of the present invention using a herringbone rod 18. When pressure is applied to change the opening and closing of the herringbone rod 18, the force and force between the two arms can be adjusted. Adjust the elastic feel of the brake lever.

FIG. 14 and FIG. 15 are the relationship diagrams of the three parts of the manual knob assembly part, and the entire clip spring 8a is embedded in the inside of the knob 20 . Figure 14 and Figure 15 show two combinations of manual knobs, the difference lies in the way the knob and compensation screw cooperate.

Fig. 16 and Fig. 17 are perspective views of the movable push rod 5a, the elastic steel wire 7a is inserted into the through hole of the neck of the movable push rod 5a, and then is strongly knocked into the right push rod 2a.

A specific embodiment of the thin double-sided disc brake of the present invention is described, and the same manual knob combination can be used on both sides.

Claims (5)

1. A thin double-sided disc brake, including a double-arm pull rod (1), a right ejector rod (2a), a movable ejector rod (5a) inserted on the right ejector rod (2a), a left ejector rod (2b), The left movable push rod (5b), the small pliers body (16), the snap spring (8a) and the knob (20) inserted on the left push rod (2b) are characterized in that the double-arm pull rod (1) There are left and right arms, and there is an elastic feel adjustment device between the two arms. There is a non-circular through hole at the end of each arm. The top of the double-arm pull rod (1) is folded or made into a boss by pressure welding (14); the center of the right push rod (2a) is inserted by the movable push rod (5a), and one end of the smaller diameter of the right push rod (2a) has an annular groove for installing a snap ring (8a); the described The middle of the left push rod (2b) is inserted by the left movable push rod (5b), and there is a non-circular columnar section at the smaller diameter end of the left pushrod (2b), which is connected with the double-arm pull rod (1 ) non-circular through hole clearance fit; the neck of the movable ejector rod (5a) has a through hole, and an elastic steel wire (7a) is inserted in the hole; there is a belt for installing a stay wire on the small pliers body (16). Screw terminal; the middle of the snap ring (8a) is stuck in the annular groove of the right push rod (2a), and the edge is a circular ring or in the shape of a notch, and the entire snap ring (8a) is embedded in the knob ( 20) Inside; the inside of the edge flanging of the knob (20) is a circular groove, or a groove corresponding to the edge shape of the snap ring (8a), and the middle part of the knob (20) drives the compensating screw ( 6a) Turn. 2. The thin double-sided disc brake according to claim 1, characterized in that: the double-arm tie rod (1) is elastic, and is in a figure-eight shape in a natural state, and there are convex or concave holes formed by stamping on both arms There is a through screw hole (11) and a thin groove (12) for placing the backguy on the boss (14) of the double-arm pull bar (1), and the side of the boss (14) has a slot (13). 3. The thin double-sided disc brake according to claim 1, characterized in that: there are 2 to 4 inclined spiral grooves on the right push rod (2a), and the deepest shape of the spiral groove is a A semi-spherical groove cut off by a curved surface or plane (17), when the steel ball (3a) is at the deepest point, one contact part is on the curved surface or plane (17), and the other contact part is on the inclined surface of the spiral groove , the bottom of the steel ball (3a) does not touch the helical groove; one end of the smaller diameter of the right push rod (2a) has a non-circular columnar section, which is non-circular with the double-arm tie rod (1) Shaped through-hole clearance fit. 4. The thin double-sided disc brake according to claim 1, characterized in that: the elastic feel adjustment device between the two arms of the double-arm tie rod (1) is a combination of screws and nuts propped between the two arms , by turning the nut to adjust the elastic force of the double-arm pull rod (1); or a pressure-bearing herringbone rod (18), adjust the force between the two arms by changing the opening and closing of the herringbone rod (18) Adjust the elastic feel of the brake lever. 5. The thin double-sided disc brake according to claim 1, characterized in that: the knob (20) is made of plastic, nylon or metal, and drives the circlip (8a) to rotate together when turning; or the circlip ( 8a) is fixed, and the knob (20) alone drives the compensation screw (6a) to rotate.