阅读说明：本技术 一种自行车刹车钢丝的固定装置 (Fixing device for bicycle brake steel wire ) 是由 叶雪峰 于 2019-11-06 设计创作，主要内容包括：本发明涉及一种自行车刹车钢丝的固定装置,包括支架,其上开有通孔,通孔内壁设置有锥面部；通孔内安装有中空的套筒,套筒位于通孔孔口的一端安装有驱动件,驱动件为与通孔螺纹连接的端盖,套筒位于通孔内的另一端沿着周向安装有多个钢珠；贯穿驱动件和套筒安装有钢丝,钢珠贯穿套筒的筒壁,随着端盖旋入通孔,施力于套筒使其朝着通孔的锥面部小端运动,从而位于套筒外侧的钢珠表面与通孔内锥面接触并受挤压向着套筒径向运动,促使位于套筒内侧的钢珠表面接触并施力于钢丝,进而将钢丝压紧固定住。本发明结构简单巧妙,钢丝固定方便可靠,且锁止精度高。(The invention relates to a fixing device of a bicycle brake steel wire, which comprises a bracket, a brake steel wire and a brake steel wire, wherein a through hole is formed in the bracket, and a conical surface part is arranged on the inner wall of the through hole; a hollow sleeve is arranged in the through hole, a driving piece is arranged at one end of the sleeve, which is positioned in the orifice of the through hole, the driving piece is an end cover in threaded connection with the through hole, and a plurality of steel balls are arranged at the other end of the sleeve, which is positioned in the through hole, along the circumferential direction; the steel wire is installed through the driving piece and the sleeve, the steel ball penetrates through the wall of the sleeve, and along with the screwing of the end cover into the through hole, the force is applied to the sleeve to enable the sleeve to move towards the small end of the conical surface of the through hole, so that the surface of the steel ball positioned outside the sleeve is in contact with the inner conical surface of the through hole and is extruded to move towards the radial direction of the sleeve, the surface of the steel ball positioned inside the sleeve is made to contact with the steel wire, and the steel. The steel wire locking device is simple and ingenious in structure, convenient and reliable in steel wire fixing and high in locking precision.)

1. The utility model provides a fixing device of bicycle brake steel wire which characterized in that: the device comprises a bracket (2), wherein a through hole is formed in the bracket (2), and a conical surface part is arranged on the inner wall of the through hole; a hollow sleeve (4) is arranged in the through hole, a driving piece is arranged at one end, positioned in the hole opening of the through hole, of the sleeve (4), and a plurality of steel balls (6) are arranged at the other end, positioned in the through hole, of the sleeve (4) along the circumferential direction; run through driving piece and sleeve (4) and install steel wire (5), steel ball (6) run through the section of thick bamboo wall of sleeve (4), are located steel ball (6) surface and the extrusion of steel wire (5) of sleeve (4) inboard, and steel ball (6) surface and the extrusion of through-hole inner cone face portion that are located the sleeve (4) outside.

2. A fixing device of a brake wire for a bicycle according to claim 1, wherein: the driving piece is an end cover (3) of an annular structure, the outer wall surface of the end cover (3) is in threaded connection with the through hole, and the inner end surface of the end cover (3) is in contact with and applies force to the end of the sleeve (4).

3. A fixing device of a brake wire for a bicycle according to claim 2, wherein: the middle part of the inner end face of the end cover (3) is provided with a counter bore to form a step, and the end head of the sleeve (4) is embedded in the step.

4. A fixing device of a brake wire for a bicycle according to claim 2, wherein: the inner wall surface of the through hole is sequentially provided with a threaded part, a straight part and a conical part; the diameter of the large end of the conical surface part is equal to that of the straight part.

5. A fixing device of a brake wire for a bicycle according to claim 1, wherein: the number of the steel balls (6) is three, and the three steel balls (6) are uniformly distributed along the circumferential direction of the sleeve (4).

6. A fixing device of a brake wire for a bicycle according to claim 1, wherein: the conical surface angle of the conical surface part is smaller than the friction angle between the conical surface part and the steel ball (6).

7. A fixing device of a brake wire for a bicycle according to claim 1, wherein: the bracket (2) is fixedly connected with the frame (1).

Technical Field

The invention relates to the technical field of bicycles, in particular to a fixing device for a bicycle brake steel wire.

Background

The soft steel wire is used as an important part in a bicycle braking system, the fixing of one end part of the soft steel wire is always the target of bicycle research, and the end part of the braking soft steel wire is reliably fixed in a reliable mode, so that the quality of the bicycle braking performance is directly influenced.

Disclosure of Invention

The applicant aims at the defects in the prior art and provides a fixing device for a bicycle brake steel wire with a reasonable structure, the force applied to the steel wire is amplified through an inclined plane, so that the steel wire is stably and reliably fixed, the operation is simple, and the locking precision is high.

The technical scheme adopted by the invention is as follows:

a fixing device for a bicycle brake steel wire comprises a bracket, wherein a through hole is formed in the bracket, and a conical surface part is arranged on the inner wall of the through hole; a hollow sleeve is arranged in the through hole, a driving piece is arranged at one end of the sleeve, which is positioned in the orifice of the through hole, and a plurality of steel balls are arranged at the other end of the sleeve, which is positioned in the through hole, along the circumferential direction; the steel ball penetrates through the wall of the sleeve, the surface of the steel ball positioned on the inner side of the sleeve is extruded with the steel wire, and the surface of the steel ball positioned on the outer side of the sleeve is extruded with the inner conical surface part of the through hole.

As a further improvement of the above technical solution:

the driving piece is an end cover of an annular structure, the outer wall surface of the end cover is in threaded connection with the through hole, and the inner end surface of the end cover is in contact with and applies force to the end of the sleeve.

The middle part of the inner end face of the end cover is provided with a counter bore to form a step, and the end head of the sleeve is embedded in the step.

The inner wall surface of the through hole is sequentially provided with a threaded part, a straight part and a conical part; the diameter of the large end of the conical surface part is equal to that of the straight part.

The quantity of steel ball is three, and three steel ball is evenly arranged along telescopic circumference.

The conical surface angle of the conical surface part is smaller than the friction angle between the conical surface part and the steel ball.

The bracket is fixedly connected with the frame.

The invention has the following beneficial effects:

the steel ball pressing device is compact and reasonable in structure and convenient to operate, axial acting force is applied to the end portion of the sleeve through the driving piece, the sleeve moves towards the small end of the through hole conical surface portion, the surfaces of the steel balls located on the outer side of the sleeve are in contact with the inner conical surface of the through hole, the steel balls are simultaneously extruded by the inner conical surface and move towards the radial direction of the sleeve, the steel balls located on the inner side of the sleeve simultaneously apply force to the steel wires, the steel wires are pressed tightly, and the steel wires are fixed.

The invention also comprises the following advantages:

the end cover is used as a driving piece and is screwed into the through hole through threaded connection so as to push the sleeve to move axially, and the force for rotating the end cover is skillfully amplified into the force for pushing the sleeve through threads;

the counter bore of the inner side surface of the end cover forms a step, and the end of the sleeve is embedded in the step, so that the sleeve moves more reliably and stably along the axial direction;

a plurality of steel balls are evenly arranged along the circumferential direction of the sleeving, so that under the action of the conical surface, the steel balls move towards the radial direction of the sleeve simultaneously to apply force to the steel wire, the circumferential stress of the steel wire is balanced, and the fixing reliability of the steel wire is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the installation of the steel wire and sleeve of the present invention.

Wherein: 1. a frame; 2. a support; 3. an end cap; 4. a sleeve; 5. a steel wire; 6. and (5) steel balls.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the fixing device for a bicycle brake steel wire of the present embodiment comprises a bracket 2, wherein the bracket 2 is provided with a through hole, and the inner wall of the through hole is provided with a conical surface portion; a hollow sleeve 4 is arranged in the through hole, a driving piece is arranged at one end of the sleeve 4, which is positioned in the hole opening of the through hole, and a plurality of steel balls 6 are arranged at the other end of the sleeve 4, which is positioned in the through hole, along the circumferential direction; run through driving piece and sleeve 4 and install steel wire 5, steel ball 6 runs through the section of thick bamboo wall of sleeve 4, and 6 surfaces of steel ball that are located the inboard of sleeve 4 extrude with steel wire 5, and 6 surfaces of steel ball that are located the outside of sleeve 4 extrude with the through-hole inner cone.

The driving piece is an end cover 3 with an annular structure, the outer wall surface of the end cover 3 is in threaded connection with the through hole, and the inner end surface of the end cover 3 is in contact with and applies force to the end of the sleeve 4; the end cover 3 is used as a driving piece, the end cover 3 is screwed into the through hole through threaded connection, then the sleeve 4 is pushed to move axially, and the force for rotating the end cover 3 is skillfully amplified into the force for pushing the sleeve 4 through threads.

The middle part of the inner end face of the end cover 3 is provided with a counter bore to form a step, and the end head of the sleeve 4 is embedded in the step, so that the sleeve 4 moves more reliably and stably along the axial direction.

The inner wall surface of the through hole is sequentially provided with a thread part, a straight part and a conical part; the diameter of the large end of the conical surface part is equal to that of the straight part.

As shown in fig. 2, the number of the steel balls 6 is three, and the three steel balls 6 are uniformly arranged along the circumferential direction of the sleeve 4, so that the steel balls 6 move toward the radial direction of the sleeve 4 simultaneously under the action of the conical surface to apply force to the steel wire 5, the circumferential force of the steel wire 5 is balanced, and the fixing reliability of the steel wire is improved.

The conical surface angle of the conical surface part is smaller than the friction angle between the conical surface part and the steel ball 6.

The bracket 2 is fixedly connected with the frame 1.

The working principle of the invention is as follows:

the end cover 3 is in the process of being screwed into the through hole of the support 2 through threaded connection, the end cover 3 applies axial acting force to the end part of the sleeve 4 to push the sleeve 4 to move along the axial direction, so that the sleeve 4 moves towards the small end of the conical surface part of the through hole, the surface of the steel ball 6 positioned on the outer side of the sleeve 4 is contacted with the inner conical surface of the through hole, the steel balls 6 are extruded by the inner conical surface simultaneously to move radially towards the sleeve 4, and then the steel balls 6 positioned on the inner side of the sleeve 4 apply force to the steel wire 5 simultaneously, the steel wire 5 is compressed tightly, and the reliable.

The steel wire 5 is fixed through the operation of the knob end cover 3, and the fixing device is convenient and fast and convenient to adjust.

The end cover 3 is screwed, screwed into the bracket 2 through threads, the force for screwing the end cover 3 is skillfully amplified into the force for pushing the sleeve 4 through threaded connection, and then the force is amplified into the force applied to the steel wire 5 through the extrusion of the inner conical surface, and the steel wire 5 is reliably fastened through the amplification of secondary force.

When the steel wire 5 is firmly locked by the steel ball 6, as long as the conical surface angle of the inner conical surface is smaller than the friction angle, the pull force at the other end of the steel wire 5 cannot cause the steel wire 5 to move relative to the steel ball 6 during braking, namely, the steel wire 5 is reliably locked by the steel ball 6, and the precision is high.

The brake steel wire fixing device effectively realizes the fixation of the brake steel wire through the threaded connection and the inner conical surface structure, and the fixation is reliable.

The above description is illustrative of the present invention, and it will be understood by those skilled in the art that fig. 1 is a schematic view of a "bicycle wire fixing mechanism" of the present invention, and not intended to limit the invention, which is defined by the claims, and any modifications may be made within the scope of the present invention, and any modifications may be made within the scope of the claims by "twice amplifying" the force using the inclined surface.