Bicycle disc brake braking part and cold heading die thereof

Abstract

The utility model discloses a bicycle disc brake braking part and a cold heading die thereof, and relates to the field of screws, the bicycle disc brake braking part comprises a bolt, a nut and a plurality of balls, the bolt is formed by connecting a bolt limiting disc, a bolt head and a bolt body in sequence, the nut is formed by connecting a nut limiting disc and a nut body, and the nut body is provided with a counterbore. First grooves are formed in the surface, close to the ball body, of the nut limiting disc in an annular array mode, second grooves are formed in the surface, close to the ball body, of the bolt limiting disc in an annular array mode, and the cross sections of the first grooves and the cross sections of the second grooves are gradually reduced in the unscrewing direction. And when the nut is tightened to a stop position along the bolt, two ends of the ball body are respectively arranged in the first groove and the second groove. When rolling out of the first groove of the nut, the ball body can enter the second groove of the bolt, and vice versa. The first grooves and the second grooves can alternately guide the balls to move towards each other, so that the balls stably and smoothly roll between the nut limiting disc and the bolt limiting disc.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw field especially relates to a bicycle disc brake braking part and cold heading die thereof. BACKGROUND

[0002] Disc brake is a kind of brake product widely used in bicycle, and disc brake is through main body built-in to make single-side compression disc brake deceleration principle.Main body built-in is an important link of disc brake main body operation, and smooth and stable powerful operation can keep the effectiveness of brake braking, and the unstable and not smooth brake assembly of current market, in addition, product main body is relatively big.

[0003] The disclosed brake assembly for bicycle disc brake in CN217146276U, although the accommodating grooves of the ball seats have slope surfaces for rolling the steel balls up and down, but the recesses of the ball push rods are small in slope, and are only used for positioning the steel balls with the accommodating grooves.When the ball push rod is combined with the ball seat, the accommodating grooves and the recesses are opposite to each other.When the steel balls roll out of the accommodating grooves, they will be located between two accommodating grooves, and at this time, the steel balls lack guidance, and the rolling of the steel balls is unstable and not smooth, and the steel balls have a certain probability of displacement and jamming.

[0004] The utility model discloses a bicycle disc brake braking part, and when the steel balls roll around the center line of the bolt, the recesses of the nut and the bolt can alternately guide the steel balls to move towards each other. UTILITY MODEL CONTENTS

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bicycle disc brake braking part, comprising: a bolt, a nut and a plurality of spheres, the bolt is composed of a bolt limiting disc, a bolt head and a bolt body connected in sequence, the nut is composed of a nut limiting disc and a nut body connected, the nut body is provided with a countersunk hole, the surface of the nut limiting disc close to the spheres is respectively provided with a first recess in annular array, the surface of the bolt limiting disc close to the spheres is respectively provided with a second recess in annular array, the cross section of the first recess and the second recess gradually reduces in the loosening direction; when the nut is tightened to the terminal position along the bolt, the bolt body is detachably arranged in the countersunk hole, the bolt head is arranged in the inside of the countersunk hole, the spheres are arranged in annular array between the bolt limiting disc and the nut limiting disc, and the two ends of the spheres are respectively arranged in the inside of the first recess and the second recess.

[0006] Preferably, the first recess and the second recess both comprise a main groove and an arc-shaped groove connected with each other, the main groove is semispherical, the cross section of the arc-shaped groove is circular and gradually reduces in the loosening direction, and the diameter of the main groove is equal to the maximum diameter of the arc-shaped groove.

[0007] Preferably, the arc-shaped groove end of the first groove is projected on the arc-shaped groove end of the second groove along the axial direction, and a gap is arranged between the arc-shaped groove end of the first groove and the arc-shaped groove end of the second groove, which matches the gap of the sphere.

[0008] Preferably, when the nut is tightened to the terminal position along the bolt, the two ends of the sphere are arranged in the main grooves of the first groove and the second groove respectively, and the diameter of the main groove is greater than or equal to the diameter of the sphere.

[0009] Preferably, the nut body is arranged at the center position of the nut limiting disc, and the nut limiting disc is provided with an annular groove, and the annular groove surrounds the nut body.

[0010] Preferably, one end of the countersunk hole is provided with an internal thread, the bolt body is provided with an external thread, the bolt body is threadedly connected with the internal thread, and the cross section of the end of the nut body close to the internal thread is a regular polygon. The internal thread and the external thread are right-handed threads.

[0011] Preferably, the cross section of the end of the nut body away from the internal thread is a circle or a regular polygon.

[0012] Preferably, the bolt and the nut are both provided with a center hole, the center hole penetrates the bolt limiting disc and the nut limiting disc, and the bolt limiting disc and the nut limiting disc are both cylindrical.

[0013] Preferably, the nuts of the two nuts are oppositely arranged on the bolt, and the annular array of the sphere is clamped between the nut limiting discs of the two nuts.

[0014] The utility model also provides a cold upsetting die, including the punch mould for processing the bicycle disc brake braking part as above, the punch mould includes punch mould main part, insert piece and the forming block for forming first groove, the insert piece is embedded in the center position of punch mould main part, the forming block is arranged in punch mould main part around insert piece array.

[0015] The utility model discloses a working principle is: the thread of nut and bolt is according to existing standard processing, and the tightening direction of nut and bolt is all clockwise. When taking the sphere as the reference system center, the tightening direction of bolt is still clockwise, and the tightening direction of nut is turned to anticlockwise. Before rolling, the one end of sphere will be contained in the main groove inside the first recess of nut, and the other end of sphere will be contained in the main groove inside the second recess of bolt. When assembling nut and bolt together, the end of the arc groove of first recess is just on the same straight line (with the center line of bolt parallel to each other) with the end of the arc groove of second recess. When the sphere revolves around the center line of bolt, the sphere can enter the second recess of bolt from the first recess of nut, and vice versa. When the sphere revolves around the center line of bolt, first recess and second recess can alternately guide the sphere revolving around the center of bolt, and first recess and second recess can also guide the sphere to the other party. Make the sphere stably and smoothly roll between the nut limiting disc and the bolt limiting disc.

[0016] The utility model discloses the beneficial effect is: the nut is along the bolt tightening to the terminal position, and the sphere will be limited by the first recess and the second recess. When the sphere revolves around the center line of bolt, the sphere can enter the second recess of bolt from the first recess of nut, and vice versa. First recess and second recess can alternately guide the sphere to move to the other party, make the sphere stably and smoothly roll between the nut limiting disc and the bolt limiting disc. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings further illustrate the utility model, but the embodiment in the drawing does not constitute any limitation to the utility model.

[0018] Figure 1 The structure schematic drawing of brake part is provided for an embodiment of the utility model;

[0019] Figure 2 The structure schematic drawing of nut is provided for an embodiment of the utility model;

[0020] Figure 3 The structure schematic drawing of bolt is provided for an embodiment of the utility model;

[0021] Figure 4 For Figure 2 A-A sectional view in the.

[0022] Sign: 1: bolt limiting disc;2: nut limiting disc;3: nut body;4: bolt head;5: bolt body;6: sphere;7: first recess;8: second recess;9: annular groove;10: main groove;11: arc groove. DETAILED DESCRIPTION

[0023] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that in the present invention, unless otherwise stated, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The term "end" generally refers to the end that is away from the arcuate groove and away from the main groove to which it is connected.

[0025] like Figures 1-4 As shown in, an embodiment provides a bicycle disc brake component, comprising: a bolt, a nut and at least three spheres 6, the bolt being composed of a bolt limiting plate 1, a bolt head 4 and a bolt body 5 connected in sequence, the nut being composed of a nut limiting plate 2 and a nut body 3 connected, the nut body 3 being provided with a countersunk hole, the surface of the nut limiting plate 2 close to the sphere 6 being provided with a first groove 7 in a ring array, the surface of the bolt limiting plate 1 close to the sphere 6 being provided with a second groove 8 in a ring array, the cross-sections of the first groove 7 and the second groove 8 gradually shrinking along the loosening direction; when the nut is tightened to the terminal position along the bolt, the bolt body 5 is detachably inserted into the countersunk hole, the bolt head 4 is arranged inside the countersunk hole, the spheres 6 are arranged in a ring array between the bolt limiting plate 1 and the nut limiting plate 2, and the two ends of the sphere 6 are respectively arranged inside the first groove 7 and the second groove 8.

[0026] like Figures 2 to 3 As shown (for reference only), the first groove 7 and the second groove 8 both include a main groove 10 and an arc groove 11 connected to each other. The main groove 10 is hemispherical, and the cross-section of the arc groove 11 is circular and gradually shrinks along the loosening direction. The diameter of the main groove 10 is equal to the maximum diameter of the arc groove 11.

[0027] The end of the arc groove 11 of the first groove 7 is axially projected onto the end of the arc groove 11 of the second groove 8 , and a gap is provided between the ends of the arc groove 11 of the first groove 7 and the ends of the arc groove 11 of the second groove 8 to fit the gap of the ball 6 .

[0028] When the nut is tightened to the end position along the bolt, the two ends of the sphere 6 are respectively arranged inside the main groove 10 of the first groove 7 and the main groove 10 of the second groove 8, and the diameter of the main groove 10 is greater than or equal to the diameter of the sphere 6.

[0029] The nut body 3 is arranged at the center of the nut limiting disc 2, the nut limiting disc 2 is provided with an annular groove 9, and the annular groove 9 surrounds the nut body 3.

[0030] The headless hole is provided with an internal thread at one end, the bolt body 5 is provided with an external thread, the bolt body 5 is threadedly connected with the internal thread, and the internal thread and the external thread are both right-handed threads. The cross section of the end of the nut body 3 away from the internal thread is circular. The cross section of the end of the nut body 3 close to the internal thread is a regular polygon. The regular polygon is preferably a regular hexagon. The regular polygon is adapted to a wrench, facilitating loosening or tightening the nut by the wrench. Avoiding machining the tooth surface on the nut body 3, reducing the machining difficulty.

[0031] The bolt and the nut are both provided with a center hole, the center hole penetrates the bolt limiting disc 1 and the nut limiting disc 2, and the bolt limiting disc 1 and the nut limiting disc 2 are both cylindrical.

[0032] One embodiment provides a bicycle disc brake braking part, compared with the above-mentioned embodiment, the embodiment comprises: a bolt, two nuts and at least three spheres 6. The bolt is composed of a bolt limiting disc 1, a bolt head 4 and a bolt body 5 connected in sequence, two nuts are both composed of a nut limiting disc 2 and a nut body 3, the internal threads of the two nuts are both right-handed threads, and the nut limiting discs 2 of the two nuts are oppositely arranged. The nut threads of the two nuts are connected to the bolt, and the spheres 6 are arranged in an annular array between the nut limiting discs 2 of the two nuts.

[0033] One embodiment provides a bicycle disc brake braking part, compared with the above-mentioned embodiment, the embodiment comprises: a bolt, two nuts and at least three spheres 6. The bolt is composed of a bolt limiting disc 1, a bolt head 4 and a bolt body 5 connected in sequence, two nuts are both composed of a nut limiting disc 2 and a nut body 3, the internal threads of the two nuts are both right-handed threads, and the nut limiting discs 2 of the two nuts are oppositely arranged. The nut threads of the two nuts are connected to the bolt, and the spheres 6 are arranged in an annular array between the nut limiting discs 2 of the two nuts.

[0034] The working principle of the present invention is as follows: before rolling, one end of the ball 6 is contained within the main groove 10 of the first groove 7 of the nut, while the other end of the ball 6 is contained within the main groove 10 of the second groove 8 of the bolt. As the ball 6 rolls counterclockwise, it rolls along the arcuate groove 11 of the first groove 7 of the nut (the second groove 8 of the bolt) and gradually approaches the bolt stop plate 1. When the ball 6 reaches the end of the arcuate groove 11 of the first groove 7, one end of the ball 6 passes from the arcuate groove 11 of the first groove 7 into the arcuate groove 11 of the second groove 8. The other end of the ball 6 then rolls on the surface of the bolt stop plate 1, and then the ball 6 continues to roll along the second groove 8. When the ball 6 reaches the main groove 10 of the second groove 8, the other end of the ball 6 enters the main groove 10 of the first groove 7, and the rolling cycle repeats. When the ball 6 rolls clockwise, the ball 6 will first roll along the second groove 8, and when it leaves the second groove 8, it will enter the arc groove 11 of the first groove 7 and continue to roll along the first groove 7. When the ball 6 rolls to the main groove 10 of the first groove 7, the other end of the ball 6 will enter the main groove 10 of the second groove 8.

[0035] One embodiment provides a cold heading die, comprising a die for processing nuts such as those described in the above embodiment. The die comprises a die body, an insert, and a forming block for forming a first groove 7. The insert is embedded in the center of the die body, and the forming block is arranged in the die body around the insert array. The forming block has a teardrop shape with one end, one large and one small.

[0036] The technical features of the above-described embodiments may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements should be considered within the scope of this specification.

Claims

1. A bicycle disc brake brake part, characterized by: The utility model relates to a bolt, nut and several spheres, the bolt is connected by bolt limiting disc, bolt head and bolt body in proper order and is composed, the nut is connected by nut limiting disc and nut body and is composed, the nut body is provided with counterbore, the surface of the nut limiting disc is respectively provided with first recess in annular array near the sphere, the surface of the bolt limiting disc is respectively provided with second recess in annular array near the sphere, the cross section of first recess and second recess gradually reduces along the loosening direction, when the nut is tightened to the terminal position along the bolt, the bolt body is detachably arranged in the counterbore, the bolt head is arranged in the counterbore, the sphere is arranged in annular array between the bolt limiting disc and the nut limiting disc, and the both ends of the sphere are arranged in the first recess and the second recess respectively. The first recess and the second recess both include a main groove and an arc-shaped groove connected to each other, the main groove is semispherical, the cross section of the arc-shaped groove is circular and gradually reduces along the loosening direction, and the diameter of the main groove is equal to the maximum diameter of the arc-shaped groove.

2. A bicycle disc brake component according to claim 1, wherein: The end of the arc-shaped groove of the first recess is axially projected on the end of the arc-shaped groove of the second recess, and a gap is arranged between the ends of the arc-shaped grooves of the first recess and the second recess to match the gap of the sphere.

3. A bicycle disc brake component according to claim 2, wherein: When the nut is tightened to the terminal position along the bolt, the both ends of the sphere are arranged in the main groove of the first recess and the main groove of the second recess respectively, and the diameter of the main groove is greater than or equal to the diameter of the sphere.

4. The bicycle disc brake component of claim 3, wherein: The nut body is arranged at the center of the nut limiting disc, the nut limiting disc is provided with an annular groove, and the annular groove surrounds the nut body.

5. The bicycle disc brake component of claim 1, wherein: One end of the counterbore is provided with an internal thread, the bolt body is threadedly connected with the internal thread, and the cross section of the end of the nut body close to the internal thread is a regular polygon.

6. The bicycle disc brake component of claim 1, wherein: The cross section of the end of the nut body away from the internal thread is circular or a regular polygon.

7. A bicycle disc brake component according to claim 6, wherein: The bolt and the nut are both provided with a center hole, the center hole penetrates the bolt limiting disc and the nut limiting disc, and the bolt limiting disc and the nut limiting disc are both cylindrical.

8. The bicycle disc brake component of claim 5, wherein: The nuts of two of the nuts are oppositely arranged on the bolt, and the spheres are clamped between the nut limiting discs of the two nuts.

9. The bicycle disc brake component of claim 4, wherein: The utility model relates to a die for machining the bicycle disc brake part, the die includes a die body, an insert and a forming block for forming the first recess, the insert is embedded at the center of the die body, and the forming block is arranged in annular array around the insert in the die body.

10. A cold heading die characterized by, ​

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