CN213502699U - Protective cover and speed-changing bicycle - Google Patents

Abstract

The embodiment of the disclosure provides a protective cover and a speed-changing bicycle, wherein the protective cover comprises a top wall, a bottom wall and a semi-surrounding wall positioned between the top wall and the bottom wall, and the top wall, the bottom wall and the semi-surrounding wall define a containing cavity for containing an inner three-speed regulator; the semi-surrounding wall is provided with an avoidance opening for avoiding a speed change line, and the speed change line is used for connecting the inner three-speed regulator and the speed change controller; the protective cover is further provided with at least one support lug, the support lug is provided with a fastening hole for a fastening piece to penetrate through, and the fastening piece is used for fixing the protective cover on a rear fork of a bicycle. The protective cover disclosed by the embodiment of the disclosure can well protect the inner three-speed regulator, and is beneficial to prolonging the service life of the inner three-speed regulator.

Description

Protective cover and speed-changing bicycle

Technical Field

The embodiment of the disclosure relates to the technical field of bicycles, in particular to a protective cover and a variable speed bicycle.

Background

The speed of the variable speed bicycle can be adjusted according to different requirements, so that the variable speed bicycle is favored by consumers, particularly mountain riding lovers.

The speed variator of the speed-variable bicycle is divided into an outer speed variator and an inner speed variator, wherein the outer speed variator is a speed variator formed by a multi-stage flywheel, and the inner speed variator is an inner three-speed variator. The inner three-speed variator is a speed-changing body with planetary gear system, and the clutch and speed-regulating element are actuated by external control to change the speed of the rear wheel, so as to regulate the speed of bicycle. Interior three-speed transmission is owing to install in the wheel hub of bicycle rear wheel, and its main speed change gear all is located wheel hub inside to through the multilayer seal, thereby can avoid the clarity of sleet, dust etc. so need not regularly to maintain, have characteristics such as convenient to use.

However, although the speed changing devices of the internal three-speed transmission are all positioned inside the hub, the speed adjusters are positioned outside the hub, so that the speed adjusters are difficult to be fully protected, and particularly, the speed adjusters are easy to collide and damage when the bicycle falls down.

SUMMERY OF THE UTILITY MODEL

The utility model provides a protection casing and variable speed bicycle to the easy problem of damaging of interior three-speed governor of solving variable speed bicycle.

In one aspect, embodiments of the present disclosure provide a shield including a top wall, a bottom wall, and a semi-surrounding wall therebetween, the top wall, the bottom wall, and the semi-surrounding wall defining a receiving cavity for receiving an internal three-speed governor; the semi-surrounding wall is provided with an avoidance opening for avoiding a speed change line, and the speed change line is used for connecting the inner three-speed regulator and the speed change controller; the protective cover is further provided with at least one support lug, the support lug is provided with a fastening hole for a fastening piece to penetrate through, and the fastening piece is used for fixing the protective cover on a rear fork of a bicycle.

In another aspect, embodiments of the present disclosure provide a variable speed bicycle comprising an inner three speed transmission, an inner three speed governor and a protective cover as described above, the inner three speed governor being mounted at one end of a main shaft of the inner three speed transmission and the inner three speed governor being accommodated in an accommodation cavity of the protective cover.

The protection casing that this disclosed embodiment provided passes through the fastener to be fixed on the back fork, and interior three-speed governor holds in the holding intracavity of this protection casing, and the variable speed line that is connected with interior three-speed governor passes from the dodging mouth that semi-peripheral wall set up of protection casing to can be connected with the variable speed controller of handlebar installation, in order to realize the adjustment to the speed of a motor vehicle. Because the inner three-speed regulator is wholly covered by the protective cover, when the variable speed bicycle is toppled, the inner three-speed regulator can be well protected from being collided, and the service life of the inner three-speed regulator is prolonged.

Various possible embodiments of the present disclosure and technical advantages thereof will be described in detail below.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural view of a variable speed bicycle according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a schematic view of the shield of FIG. 4 from another perspective;

fig. 6 is a schematic view illustrating an installation of a protective shell according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of the upper shell of FIG. 6;

fig. 8 is a structural view of the lower case of fig. 6.

Description of reference numerals:

100-a vehicle body; 110-a rear fork; 1101-elongated opening;

200-a handlebar; 300-front wheels; 400-rear wheel;

500-treading; 610-inner three speed transmission; 620-inner three-speed governor;

621-observation window; 700-a shield; 711-top wall;

7111-observation area; 713-half wall; 7131-dodge mouth;

7132-a step; 715-surrounding eaves; 716-a lug;

7161-fastening holes; 800-a connector; 801-socket joint hole;

802-bolt holes; 900-a variable speed controller; 910-a body;

911-mounting holes; 912-locking holes; 913 — a gear display area;

920-rotating the handle; 930-a speed change pipe; 1000-protective shell;

1010-upper shell; 1011-transparent area; 1012-pinboard;

1013-a first top wall; 1014-a second top wall; 1015-a first end wall;

1020-a lower shell; 1021-a second opening; 1022-a third opening;

1023-a socket; 1024 — a fourth opening; 1025-a first sidewall;

1026 — first bottom wall; 1027-third sidewall; 1028 — a fourth side wall;

1029-second bottom wall; 10210-second end wall; 1030 — a first opening;

1040-locating columns; 1050-positioning a plate; 1051-a via;

1060-screws.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The bicycle is generally supported on the ground through a foot stand, but the supporting stability is not high through the supporting mode of the foot stand, and the problem that the bicycle topples frequently occurs especially through the supporting mode of a unilateral foot stand. When the bicycle falls over, it collides with the ground or an object on the ground, which easily causes deformation of parts on the bicycle. For the variable speed bicycle, transmission parts are important parts of the variable speed bicycle, and if the parts deform when colliding, the variable speed function of the variable speed bicycle is often caused to be in problem, so that the riding effect is influenced.

In the variable speed bicycle adopting the inner three-speed change component, although the inner three-speed change speed changer is protected by the hub because the inner three-speed change speed changer is arranged in the hub of the rear wheel and is not easy to be damaged, the inner three-speed regulator and the variable speed controller of the variable speed bicycle are exposed in the environment and are easy to be damaged when the variable speed bicycle falls down. Accordingly, the present disclosure provides a protective cover that can house an inner three-speed governor, which can protect the inner three-speed governor from damage.

In order to make the aforementioned objects, features and advantages more comprehensible, embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the disclosure without making any creative effort, shall fall within the protection scope of the disclosure.

Fig. 1 is a schematic structural view of the speed-changing bicycle provided in the present embodiment. As shown in fig. 1, the present embodiment provides a speed-changing bicycle including a body 100, a handlebar 200, a front wheel 300, a rear wheel 400, and pedals 500.

The vehicle body 100 includes a frame, a front fork, and a rear fork. The frame serves as a framework of the speed-variable bicycle, and most parts of the speed-variable bicycle are directly or indirectly mounted on the frame. For example, a front fork is rotatably mounted to a front portion of the frame, a handle bar 200 is mounted to an upper portion of the front fork, and a front wheel 300 is mounted to a lower portion of the front fork via a front axle. When the rider holds and rotates the handlebar 200, the front wheel 300 can be rotated by the front fork, thereby steering the bicycle.

The pedals 500 are mounted on a center shaft in the middle of the frame, the rear fork is mounted on the rear of the frame, and the rear wheel 400 is mounted on the rear fork through a rear shaft. The pedal 500 is connected with a chain wheel, the rear wheel 400 is connected with a multi-stage flywheel formed by combining a plurality of flywheels, and the chain wheel is in transmission connection with one flywheel of the multi-stage flywheel through a chain. When the rider steps on the pedals 500 to rotate the pedals 500, the pedals 500 drive the sprocket to rotate, so that the sprocket drives the flywheel to rotate through the chain, and the flywheel drives the rear wheel 400 to rotate, thereby moving the variable speed bicycle.

A shift controller 600 is mounted on the handlebar 200. Illustratively, the shift controller 600 includes a main body, a twist grip rotatably disposed within the main body, and a shift cable having one end connected to the twist grip and the other end connected to an inner three-speed governor described below. When the speed of a bicycle needs to be adjusted, the output of the planetary gear train in the inner three-speed transmission can be adjusted through the inner three-speed regulator by rotating the handlebar to pull the speed change line, so that the rotating speed of the rear wheel is changed, and the speed of the bicycle is adjusted.

FIG. 2 is a schematic view of a portion of the structure of FIG. 1; fig. 3 is an exploded view of fig. 2. As shown in fig. 2 and 3, the inner three-speed transmission 610 is nested in the hub of the rear wheel, that is, the inner three-speed transmission 610 is hidden inside the hub of the rear wheel 400. Illustratively, the inner three speed transmission 610 includes an outer tub, a main shaft, a planetary gear train, sprockets, and clutches. The main shaft penetrates through the whole outer barrel along the central axis direction of the outer barrel, and the planetary gear train is sleeved on the main shaft and located inside the outer barrel and used for driving the rear wheel 400 to rotate. The chain wheel is sleeved on the main shaft, positioned outside the outer barrel and used for being in transmission connection with a pressure plate connected with the pedal through a chain, so that when a rider pedals the pedal, the chain wheel can be driven to rotate through the chain, the rear wheel 400 is driven to rotate, and the movement of the variable speed bicycle is realized. The clutch is disposed between the planetary gear train and the sprocket for adjusting the output of the planetary gear train, so that the rotational speed of the rear wheel 400 can be adjusted to achieve the adjustment of the speed of the variable speed bicycle.

The right end of the main shaft passes through an avoiding opening of the rear fork 110 to be connected with the inner three-speed governor 620, the protective cover 700 covers the outer part of the inner three-speed governor 620 and is tightly connected with the rear fork 110, so that the inner three-speed governor 620 is protected, and the protective cover 700 can be made of plastics. Illustratively, the rear fork 110 includes a first section for receiving the chain and a second section for mounting the main shaft, the second section having a vertical dimension greater than that of the first section. The second section is provided with an elongated opening 1101 for mounting a spindle, and the spindle is inserted into the elongated opening 1101 and can freely rotate in the elongated opening 1101. The shroud 700 may be fastened to the second section of the rear fork 110 by bolts, screws, snaps, or other removable means to provide protection for the inner three speed governor 620 housed within the shroud 700.

Fig. 4 is a partially enlarged view of fig. 3, and fig. 5 is a structural diagram of the shield 700 in fig. 4 from another view angle. As shown in fig. 4 and 5, the shield 700 includes a top wall 711, a bottom wall, and a semi-surrounding wall 713 between the top wall 711 and the bottom wall, such that the top wall 711, the bottom wall, and the semi-surrounding wall 713 enclose an accommodating cavity having an opening, and the inner three-speed governor 620 at the end of the spindle is accommodated in the accommodating cavity. Specifically, taking fig. 4 as an example, the top wall 711, the bottom wall, and the semi-surrounding wall 713 of the shield 700 enclose an accommodating cavity with an opening on the left side, and the inner three-speed governor 620 mounted on the right end of the spindle enters the accommodating cavity from the right opening of the shield 700.

In preparation, the shield 700 may be fabricated using plastic through an injection molding process. When being installed, the protective cover 700 covers the outer part of the inner three-speed governor 620 from right to left, and then the protective cover 700 is fixedly connected with the rear fork 110, thereby protecting the inner three-speed governor 620.

With continued reference to fig. 4 and 5, in order to enable the shift cable to extend into the accommodating cavity of the protective cover 700, an avoiding opening 7131 is provided on the semi-wall 713 of the protective cover 700, so that the shift cable can extend into the accommodating cavity through the avoiding opening 7131 to connect the inner three-speed governor 620 with the shift controller, and the rider can drive the shift cable through the shift controller to actuate the inner three-speed governor 620 so as to adjust the position of the clutch, and then adjust the output of the planetary gear train, thereby adjusting the speed of the speed-changing bicycle. On the opposite side of the escape opening 7131 is a projection that receives an adjustment nut of the internal three speed shift control. Illustratively, the projections are generally rounded rectangular in shape.

It should be noted that in some examples, the bypass opening 7131 can be a closed-all-around structure, while in other examples, the bypass opening 7131 can also be designed to be a semi-closed structure as shown in FIG. 5. In addition, in order to protect the joint portion of the shift cable, as shown in fig. 5, an eave 715 connected to the semi-surrounding wall 713 may be provided at an edge of the escape opening 7131.

In an alternative implementation, a semi-enclosed escape opening 7131 may be provided at the lower right of the shield 700 as shown in fig. 5, and when the shield 700 is mounted on the rear fork 110, a through hole of a substantially rounded rectangle may be enclosed between the side wall of the shield 700 and the rear fork 110, and one end of the speed change line may extend into the accommodating cavity of the shield 700 through the through hole and be connected to the inner three-speed governor 620. Of course, the shape of the via may be other shapes, such as an approximately circular or elliptical shape.

With continued reference to fig. 4 and 5, the shield 700 is provided with a lug 716, and the lug 716 is provided with a fastening hole 7161 through which a fastening member may be passed to fasten it to the rear fork 110. For example, a bolt is fastened to a screw hole provided in the rear fork 110 through the fastening hole 7161, thereby fixedly fixing the shield 700 to the rear fork 110. By means of the support lug 716, the protective cover 700 can be conveniently mounted.

Alternatively, one lug 716 is provided on each of the top wall 711 and the bottom wall of the shield 700, and the two lugs 716 may be located on both sides of the longitudinal center line (Y-axis direction) of the shield 700, for example, one lug 716 is provided on each of the lower left and upper right of the shield 700 as shown in fig. 4. It should be noted that the support lug 716 provided in fig. 4 is connected not only to the top wall 711 or the bottom wall, but also to the side walls. By providing a plurality of lugs 716, the connection strength between the shield 700 and the rear fork 110 can be improved, thereby better protecting the internal inner three-speed governor 620.

Further, in fig. 4, the lug 716 positioned at the upper right side is provided on a step portion 7132 of the side surrounding wall, the step portion 7132 is positioned above the escape opening 7131, that is, the step portion 7132 is formed on the side surrounding wall above the escape opening 7131, and the bottom of the lug 716 extends to the step portion 7132. By forming the step portion 7132 on the side surrounding wall and extending the bottom of the lug 716 to the step portion 7132, the connection strength of the lug 716 can be improved.

Alternatively, as shown in fig. 4 and 5, an observation area 7111 is provided on the top wall 711, and the area of the observation area 7111 may be smaller than the area of the observation window 621 of the inner three-speed governor 620, so that a rider can observe the pointer of the inner three-speed governor 620 from the outside of the protection cover 700, and thus the inner three-speed governor 620 can be adjusted in time, and the inner three-speed transmission 610 can work efficiently. Additionally, the viewing area 7111 may be a transparent portion of the enclosure 700 or may be a viewing port in the top wall 711.

Alternatively, referring to fig. 4, the shield 700 is fastened to the rear fork 110 by a connector 800, the connector 800 is located between the inner three-speed governor 620 and the rear fork 110, and the connector 800 is provided with a socket hole 801 so that it can be mounted on the main shaft through the socket hole 801. In order to fasten the shield 700, a bolt hole 802 may be provided on the connector 800 coaxially with the fastening hole 7161 as shown in fig. 4, and a bolt may be screwed with the bolt hole 802 through the fastening hole 7161 of the lug 716, thereby achieving the fixation of the shield 700 and the rear fork 110. Through setting up connecting piece 800 and fastening protection casing 700 on back vent 110, can avoid interior three-speed governor 620 skew to lead to the phenomenon that the fastening hole 7161 of journal stirrup 716 can't be aligned with the screw hole that back vent 110 set up in advance to can reduce the assembly degree of difficulty, improve assembly efficiency. In addition, in order to further improve the coupling strength of the shield cap 700, the coupling member 800 may be made of a metal material, such as stainless steel, and a coupling piece as shown in fig. 4 may be made as the coupling member 800 coupled to the shield cap 700.

Therefore, in the embodiment, the protective cover 700 fixedly connected with the rear fork 110 is arranged outside the inner three-speed regulator 620, so that the inner three-speed regulator 620 can be protected from being collided when the variable speed bicycle is toppled over, and the service life of the variable speed bicycle can be prolonged.

Similarly, the speed-change controller connected to the inner three-speed governor 620 through the speed-change line can be covered in the protective case to prevent the speed-change bicycle from being damaged when the speed-change bicycle falls down, thereby prolonging the service life of the speed-change controller. The following describes the shift controller and the protective case protecting the shift controller with reference to the drawings, so that the technical solution of the present disclosure can be more clearly understood.

Fig. 6 is an installation diagram of the protective shell according to the embodiment. As shown in fig. 6, the shift controller 900 includes a main body 910, a rotating handle 920, and a shift cable. The rotating handle 920 is disposed on the main body 910, the main body 910 and the rotating handle 920 are provided with mounting holes 911, and the main body 910 and the rotating handle 920 are sleeved on the handlebar 200 through the mounting holes 911. One end of the speed change line extends into the main body 910 to be connected with the rotating handle 920, and the other end of the speed change line is connected with the inner three-speed governor. When the rider rotates the rotating handle 920, the rotating handle 920 pulls the speed change line, and the speed change line drives the inner three-speed regulator to act, so that the output of the planetary gear train of the inner three-speed regulator is changed, and the speed of the speed-changing bicycle is further adjusted.

In one possible embodiment, a rotating frame is installed in the main body 910, the rotating frame is connected with the rotating handle 920, and the shift cable is wound on the rotating frame. When the rider rotates the rotating handle 920, the rotating handle 920 drives the rotating frame to rotate, so that the rotating frame winds the speed change line to drive the inner three-speed regulator to act.

The main body 910 may be divided into an upper portion and a lower portion, the upper portion of the main body 910 is a portion of the main body 910 facing away from the ground, and the lower portion of the main body 910 is a portion of the main body 910 facing the ground. The mounting hole 911 is formed at a lower portion of the body 910, and the locking hole 912 is formed at a lower portion of the body 910. The lower portion of the main body 910 and the rotating grip 920 are fitted around the handle bar 200 using the fitting hole 911, and the main body 910 and the rotating grip 920 are fixedly fitted together to the handle bar 200 using the locking member inserted into the locking hole 912. Wherein, the locking piece can be a screw or a bolt. After the lower portion of the main body 910 and the rotating handle 920 are fitted to the handle bar 200, a screw or bolt is inserted into the locking hole 912, and the screw or bolt is threadedly coupled to the handle bar 200, so that the main body 910 and the rotating handle 920 can be fixedly mounted to the handle bar 200 together.

In a possible embodiment, the main body 910 has a gear display area 913 on the upper portion, and a gear plate and an indication arrow are provided in the gear display area 913, the gear plate is connected to the handle 920, and a plurality of digital gears are provided on the gear plate. When the rider rotates the rotating handle 920, the gear plate rotates along with the rotating handle, and the rider can know the current gear of the speed-changing bicycle by observing the digital gear on the gear plate pointed by the indicating arrow.

In one possible embodiment, a shift tube 930 is mounted to the body 910, and the shift tube 930 is used to pass and guide a shift cable. To facilitate mounting of the shift tube 930, a portion of the body 910 extends outwardly. Thus, the body 910 may also be divided into a mounting portion mounted on the handlebar 200 and an extension portion extending outwardly from the mounting portion, with the shift tube 930 disposed in the extension portion, and the shift tube 930 communicating with the mounting portion such that the shift cable is connected with a component in the mounting portion.

Further, a protective shell 1000 is further sleeved outside the main body 910 of the variable speed controller 900, in other words, the protective shell 1000 is wrapped on the main body 910 of the variable speed controller 900. Illustratively, the interior of the protective case 1000 has a receiving cavity, the main body 910 of the variable speed controller 900 is received in the receiving cavity of the protective case 1000, and the rotating handle 920 of the variable speed controller 900 is exposed outside the protective case 1000, so as to prevent the protective case 1000 from interfering with the rider's rotation of the rotating handle 920; the shift cable of the shift controller 900 extends out of the shield case 1000 so as not to prevent the shield case 1000 from interfering with the connection of the shift cable of the shift controller 900 with the inner three-speed governor.

It should be noted that the main body 910 of the speed change controller 900 is protected from the outside by the protective case 1000, so that when the speed change bicycle falls down or bumps into an object, the main body 910 of the speed change controller 900 is not easily damaged, and the service life of the speed change controller 900 can be prolonged.

With continued reference to FIG. 6, in one possible implementation, the protective housing 1000 includes an upper shell 1010 and a lower shell 1020, wherein the upper shell 1010 and the lower shell 1020 are removably coupled to facilitate mounting the protective housing 1000 on the variable speed controller 900.

When the upper casing 1010 and the lower casing 1020 are connected together, the upper casing 1010 and the lower casing 1020 enclose a containing cavity for containing the main body 910 of the variable speed controller 900. The shape of the receiving cavity may match the shape of the main body 910 so that the inner surfaces of the upper and lower cases 1010 and 1020 are in contact with the main body 910 to better protect the main body 910 from the outside.

Furthermore, a plurality of positioning columns 1040 are arranged on the outer surface of the upper shell 1010, a plurality of positioning plates 1050 are arranged on the outer surface of the lower shell 1020, and the positioning columns 1040 and the positioning plates 1050 are arranged in a one-to-one correspondence manner. Wherein, be equipped with the screw hole in the reference column 1040, be equipped with through-hole 1051 on the locating plate 1050, wear to be equipped with screw 1090 in screw hole and the through-hole 1051, screw 1090's screw rod and screw hole threaded connection, the head and the locating plate 1050 of screw 1090 offset to link together epitheca 1010 and inferior valve 1020.

It should be noted that, in order to align the threaded holes of the positioning posts 1040 with the through holes 1051 of the positioning plate 1050, in one possible embodiment, a plug board 1012 is disposed on the edge of the upper shell 1010, a plug port 1023 is disposed on the edge of the lower shell 1020, the plug board 1012 is inserted into the plug port 1023, the shape of the plug board 1012 matches the shape of the plug port 1023, and the positioning posts 1040 are disposed on the outer surface of the plug board 1012.

As shown in fig. 6, one or both of the upper shell 1010 and the lower shell 1020 are provided with a first opening 1030, the first opening 1030 being in communication with the receiving chamber for passing a shift cable of the shift controller 900 therethrough. Illustratively, an upper circular arc hole is formed in the upper shell 1010, a lower circular arc hole is formed in the lower shell 1020, and the upper circular arc hole and the lower circular arc hole together enclose a circular first opening 1030 when the upper shell 1010 and the lower shell 1020 are connected together. It will be readily appreciated that the shift tube 930 can pass through this circular aperture when the shift tube 930 is mounted on the main body 910 of the shift controller 900.

With continued reference to FIG. 6, the lower shell 1020 also defines a second opening 1021 for exposing the rotating knob 920 of the shift controller 900 outside the protective shell 1000. The second opening 1021 is in communication with the accommodating cavity, and when the main body 910 of the shift controller 900 is accommodated in the accommodating cavity, the rotating handle 920 of the shift controller 900 can pass through the second opening 1021, so that the rotating handle 920 of the shift controller 900 is exposed outside the protective case 1000, and the protective case 1000 does not obstruct the rider from rotating the rotating handle 920.

The lower shell 1020 is also provided with a third opening 1022, the third opening 1022 being for the handlebar 200 to pass through. The third opening 1022 is in communication with the receiving cavity, and when the main body 910 of the shift controller 900 is received in the receiving cavity, the handlebar 200 can be inserted through the mounting holes 911 in the main body 910 and the rotating handle 920 of the shift controller 900 and the third opening 1022 in the lower housing 1020, thereby mounting the shift controller 900 and the protective housing 1000 together on the handlebar 200.

In one possible embodiment, as shown in FIG. 6, a fourth opening 1024 is formed in the lower shell 1020, and the fourth opening 1024 is used for receiving a locking member of the shift controller 900. The fourth opening 1024 communicates with the receiving chamber, and when the main body 910 of the shift controller 900 is received in the receiving chamber, the locking member is inserted into the locking hole 912 of the lower portion of the main body 910 after passing through the fourth opening 1024, thereby mounting the main body 910 and the twist grip 920 together on the handlebar 200.

In one possible embodiment, the upper shell 1010 has a transparent area 1011, and the transparent area 1011 corresponds to the gear position display area 913 of the main body 910, that is, the position of the transparent area 1011 corresponds to the position of the gear position display area 913. In order to facilitate observation of the gear information displayed by the gear display region 913, the area of the transparent region 1011 is greater than or equal to the area of the gear display region 913. The transparent area 1011 of the upper shell 1010 may be made of a transparent material, and other areas of the upper shell 1010 may be made of a non-transparent material. The rider can observe the shift information displayed in the shift display area 913 through the transparent area 1011 to know the current shift of the speed-changing bicycle.

Further, the upper shell 1010 may be a transparent shell, that is, all regions of the upper shell 1010 are made of a transparent material. The rider can observe the gear information displayed in the gear display area 913 through the upper shell 1010 to know the current gear of the variable speed bicycle; in addition, the upper shell 1010 is a fully transparent shell, and is conveniently made of a transparent material through integral molding.

Fig. 7 is a schematic structural view of the upper case of fig. 6. As shown in fig. 7, in one possible implementation, the upper shell 1010 includes a first top wall 1013, a second top wall 1014, and a first end wall 1015. Fig. 8 is a structural view of the lower case of fig. 6. As shown in fig. 8, in one possible implementation, the lower case 1020 includes a first side wall 1025, a second side wall, a first bottom wall 1026, a third side wall 1027, a fourth side wall 1028, a second bottom wall 1029, and a second end wall 10210.

Wherein, the first top wall 1013, the first side wall 1025, the second side wall and the first bottom wall 1026 enclose a first receiving cavity for receiving the mounting portion of the main body 910, the third opening 1022 is disposed on the first side wall 1025, and the second opening 1021 is disposed on the second side wall. The second top wall 1014, the first end wall 1015, the third side wall 1027, the fourth side wall 1028, the second bottom wall 1029 and the second end wall 10210 define a second receiving cavity for receiving the extension portion of the main body 910, the first receiving cavity and the second receiving cavity together form a receiving cavity of the protective shell 1000, and the first opening 1030 is disposed between the first end wall 1015 and the second end wall 10210.

When the protective case 1000 needs to be installed, the upper case 1010 is covered and buckled on the upper side of the main body 910 of the variable speed controller 900 from top to bottom, the lower case 1020 is covered and buckled on the lower side of the main body 910 of the variable speed controller 900 from bottom to top, and then the upper case 1010 and the lower case 1020 are fastened together through screws. The shift cable passes through the first opening 1030 of the shield case 1000, the twist grip 920 passes through the second opening 1021 of the lower case 1020, and the handlebar 200 passes through the third opening 1022 of the lower case 1020.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A protective cover is characterized by comprising a top wall, a bottom wall and a semi-surrounding wall positioned between the top wall and the bottom wall, wherein the top wall, the bottom wall and the semi-surrounding wall define a containing cavity for containing an inner three-speed regulator;

the semi-surrounding wall is provided with an avoidance opening for avoiding a speed change line, and the speed change line is used for connecting the inner three-speed regulator and the speed change controller;

the protective cover is further provided with at least one support lug, the support lug is provided with a fastening hole for a fastening piece to penetrate through, and the fastening piece is used for fixing the protective cover on a rear fork of a bicycle.

2. The shield cap according to claim 1, wherein the edge of the evasion opening is provided with an eave connected to the semi-enclosing wall.

3. The shield of claim 1 wherein said top wall and said bottom wall are each provided with one of said lugs.

4. The shield of claim 3 wherein the lugs of the top wall and the lugs of the bottom wall are located on opposite sides of a longitudinal centerline of the shield.

5. The shield cap according to claim 3, wherein the semi-surrounding wall is formed with a step portion above the evasion opening, and the top wall is provided with lugs extending to the step portion.

6. The shield of claim 1, wherein the top wall is provided with a viewing area for viewing a pointer of the inner three speed governor.

7. The shield of claim 6, wherein the area of the viewing zone is less than the area of the viewing window of the inner three speed governor.

8. The shield cap according to any one of claims 1-7, wherein the shield cap is fastened to the rear fork by a connector, and the connector is sleeved on the main shaft of the inner three-speed governor and is located between the rear fork and the inner three-speed governor.

9. The shield of claim 8 wherein the connector has bolt holes and the fasteners are bolts.

10. A variable speed bicycle comprising an inner three speed transmission, an inner three speed governor and the hood of any of claims 1-9, the inner three speed governor being mounted at one end of a main shaft of the inner three speed transmission and the inner three speed governor being received within a receiving cavity of the hood.

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