CN221852013U - A brake and directional transmission mechanism capable of revealing and hiding a brake handle as a push rod changes direction - Google Patents

Abstract

The utility model discloses a brake and directional transmission mechanism capable of realizing the exposure and concealment of a brake handle with the reversal of a push rod, comprising a main shaft fixed in a lower cross bar of a frame, a rotating block and a second traction wheel are arranged on the main shaft, a first traction wheel and a brake handle that can slide forward and backward are arranged on the rotating block, and the first traction wheel is connected to the brake handle through a toggle plate; a contact block is arranged at the right end of the rotating block, and a push block is arranged on the left side of the second traction wheel; a traction cam plate assembly is arranged at the connection between the push rod and the side connecting rod of the frame, the first traction wheel and the traction cam plate assembly are connected through a main traction rope, and a synchronous traction rope is connected between the first traction wheel and the second traction wheel; both ends of the rotating block are connected to a brake locking pressing mechanism through a push rod transmission assembly; the first traction wheel and the second traction wheel are connected to a steering locking mechanism through a directional traction rope. The utility model can realize the function of exposing the brake handle when it is on the same side as the push rod and storing it when it is on the opposite side to the push rod, so as to avoid the brake handle from being stepped on by mistake and prolong the service life.

Description

A brake and directional transmission mechanism capable of revealing and hiding a brake handle as a push rod changes direction

Technical Field

The utility model belongs to the field of baby strollers, and in particular relates to a brake and directional transmission mechanism which can realize the exposure and concealment of a brake handle as a push rod is reversed.

Background Art

Nowadays, baby strollers with wheel orientation and brake functions are quite common in the market. And with the upgrade of functions, most baby strollers also have the function of push rod reversing, which can save the trouble of turning the baby stroller. For this reason, most baby strollers that can switch back and forth often have two sets of brake handles, brakes and orientation mechanisms, so that users can alternately lock the steering and brakes of the wheels according to the needs of pushing.

In the prior art, the front and rear brake handles, brakes and directional mechanisms of the baby stroller usually switch between an effective state and an ineffective state according to the front and rear positions of the push rod. For example, when the push rod is switched from the front position of the baby stroller to the rear position, the rear brake handle, brake and directional mechanism are switched to an effective state, that is, the rear wheel automatically achieves steering lock and the rear brake handle can trigger the brake lock, while the front brake handle, brake and directional mechanism are switched to an ineffective state, that is, the front wheel resumes steering freedom and the front brake cannot trigger the brake lock.

However, the front and rear brake handles of existing baby strollers are exposed (extended) from the lower crossbar of the frame whether in the disabled state or in the effective state, which makes it easy for the brake handle on the disabled side to be stepped on intentionally or unintentionally by the user. In the long run, the brake handle itself and its corresponding transmission parts will be damaged in advance, thus greatly shortening the service life.

At the same time, in the same set of brake handles, brakes and directional mechanisms of existing baby strollers, the brake handles will control the movement of the brake assembly and the directional assembly respectively by pulling or releasing two corresponding traction cables. This results in multiple traction cables in a set of brake handles, brakes and directional mechanisms, which makes the wiring more complicated and increases the difficulty of installing and repairing the brake handles, brakes and directional mechanisms.

Utility Model Content

In view of the defects in the prior art, the utility model provides a brake and directional transmission mechanism that can realize the exposure and concealment of the brake handle as the push rod changes direction, and can realize the extension of the brake handle on the same side of the push rod and the storage of the brake handle at the opposite position of the push rod to avoid users from stepping on it by mistake.

In order to solve the above technical problems and achieve the above technical effects, the utility model is implemented through the following technical solutions:

A brake and directional transmission mechanism capable of exposing and hiding a brake handle as a push rod is reversed, comprising a main shaft fixedly arranged in a lower cross bar of a frame, a rotating block rotatably sleeved on the main shaft, a rotatable first traction wheel and a brake handle that can slide back and forth are arranged on the rotating block, a toggle plate is arranged between the first traction wheel and the brake handle, one end of the toggle plate is fixedly connected to the side of the first traction wheel, and the other end of the toggle plate is slidably connected to the side of the brake handle left and right, a brake handle through hole for the brake handle to enter and exit is opened at a corresponding position of the lower cross bar of the frame; the first traction wheel is located on the left side of the brake handle, and a rotatable second traction wheel is arranged on the main shaft located on the right side of the rotating block , a contact block is provided at the right end of the rotating block, and a pushing block for pushing the contact block is provided on the left side of the second traction wheel; a traction cam plate assembly is provided at the rotation connection between the push rod of the baby stroller and the frame side connecting rod, a main traction rope is connected between the first traction wheel and the traction cam plate assembly, and a synchronous traction rope is connected between the first traction wheel and the second traction wheel; the left and right ends of the rotating block are respectively connected to the brake locking pressing mechanism installed in the left and right frame joints through the corresponding push rod transmission assembly; the first traction wheel and the second traction wheel are respectively connected to the steering locking mechanism installed in the left and right frame joints through the corresponding directional traction rope.

Furthermore, a sealing plate is provided at the lower edge of the brake handle through hole for automatically covering the brake handle through hole when the brake handle is retracted into the lower cross bar of the frame.

Furthermore, a first traction wheel mounting seat and a brake handle slide are arranged side by side on the left and right sides of the rotating block, the first traction wheel is rotatably arranged on the first traction wheel mounting seat, and a first torsion spring is arranged between the first traction wheel and the first traction wheel mounting seat so that the first traction wheel can automatically reset to a clockwise direction, the brake handle slide corresponds to the position of the brake handle through hole, and the brake handle can be slidably arranged in the brake handle slide.

Furthermore, the toggle plate is integrally formed on the side wall of the first traction wheel on the side close to the brake handle, and the other end of the toggle plate is fixedly penetrated by a sliding pin perpendicular to the toggle plate, and the side wall of the brake handle close to the first traction wheel is provided with a toggle plate mounting groove for facilitating the toggle plate to swing back and forth, and the upper and lower groove walls of the toggle plate mounting groove are respectively provided with waist-shaped holes for the sliding pin to slide left and right; the other end of the toggle plate can be set in the toggle plate mounting groove so as to swing back and forth, and the upper and lower ends of the sliding pin can be respectively set in the upper and lower waist-shaped holes so as to slide left and right, and the first traction wheel drives the toggle plate to swing clockwise or counterclockwise by rotating clockwise or counterclockwise, thereby driving the brake handle to extend or retract into the brake handle through hole.

Furthermore, a T-shaped protrusion is provided in the middle portion of the upper surface of the brake handle slide along its length direction, and a T-shaped slide groove that can slidably cooperate with the T-shaped protrusion is provided in the middle portion of the lower surface of the brake handle along its length direction. When the brake handle is installed on the brake handle slide, the T-shaped protrusion is embedded in the T-shaped slide groove and is in a sliding connection relationship to improve the movement stability of the brake handle on the brake handle slide.

Furthermore, two layers of traction rope embedding grooves are provided on the circumferential side wall of the first traction wheel, and one layer of traction rope embedding groove is provided on the circumferential side wall of the second traction wheel; the lower end of the main traction rope is fixedly connected to the upper part of the first layer of traction rope embedding groove of the first traction wheel through a corresponding traction rope fixing pin; the left end of the synchronous traction rope is fixedly connected to the upper part of the second layer of traction rope embedding groove of the first traction wheel through a corresponding traction rope fixing pin, and the right end of the synchronous traction rope is fixedly connected to the lower part of the traction rope embedding groove of the second traction wheel through a corresponding traction rope fixing pin; the right end of the directional traction rope located on the left side is fixedly connected to the lower part of the second layer of traction rope embedding groove of the first traction wheel through a corresponding traction rope fixing pin; the left end of the directional traction rope located on the right side is fixedly connected to the lower end of the traction rope embedding groove of the second traction wheel through a corresponding traction rope fixing pin.

Furthermore, the traction cam plate assembly includes a cam, an arc plate and a force-bearing protrusion, and the cam, the arc plate and the force-bearing protrusion are all located on the inner side surface of the rotation connection between the frame side link and the push rod; wherein the cam is fixedly connected to the inner end of the rotating shaft at the rotation connection between the push rod and the frame side link, and is coaxial with the rotating shaft; the arc plate surrounds the outside of the cam, one end of the arc plate is hinged to the outer inner wall of the upper end cover of the frame side link, and the other end of the arc plate is fixedly connected to the upper end of the main traction cable through the corresponding traction cable fixing pin, and the force-bearing protrusion is fixedly arranged on the side surface of the arc plate, and the protruding part of the force-bearing protrusion contacts the arc surface of the cam.

Furthermore, the push rod transmission assembly includes a first fixed block, a second fixed block, a first brake transmission cross bar, a second brake transmission cross bar, a first cross bar side push cam block and a second cross bar side push cam block; the first fixed block and the second fixed block are both fixedly sleeved on the main shaft and are respectively located on the left and right sides of the rotating block; a second traction wheel mounting seat is provided on the second fixed block, the second traction wheel is rotatably provided on the second traction wheel mounting seat, and a second return torsion spring that can automatically return the second traction wheel to a counterclockwise direction is provided between the second traction wheel and the second traction wheel mounting seat;

The first brake transmission cross bar can be slidably disposed on the first fixed block, the first cross bar side push cam block is fixedly disposed on the left end of the rotating block, the left end of the first brake transmission cross bar is fixedly connected with a wedge block, the wedge block can be slidably disposed inside the left frame joint, and is transmission-connected with the brake locking pressing mechanism installed in the left frame joint, the right end of the first brake transmission cross bar is fixedly sleeved with a first spherical end cap, and the first spherical end cap is in sliding contact with the first cross bar side push cam block;

The second brake transmission cross bar can be slid horizontally left and right on the second fixed block, the second cross bar side push cam block is fixedly set on the right end of the rotating block, the right end of the second brake transmission cross bar is fixedly electrolyzed with a wedge block, the wedge block can be set horizontally left and right inside the right side frame joint, and is transmission connected with the brake locking pressing mechanism installed in the right side frame joint, the left end of the second brake transmission cross bar is fixedly sleeved with a second spherical end cap, and the second spherical end cap is in sliding contact with the second cross bar side push cam block.

Furthermore, the steering locking mechanism includes a directional pin, which is movably arranged inside the frame joint up and down, and is provided with a pin tension spring which allows the bottom end of the directional pin to automatically extend out of the lower surface of the frame joint; at the same time, the top end of the wheel fork is provided with a pin slot for plugging and cooperating with the bottom end of the directional pin; the left end of the directional traction cable located on the left side is connected to the top of the directional pin inside it after extending into the frame joint on the left side, and the right end of the directional traction cable located on the right side is connected to the top of the directional pin inside it after extending into the frame joint on the left side.

Furthermore, a sleeve is respectively provided on the opposite surfaces of the left and right frame joints, and the two ends of the main shaft are respectively inserted into the left and right sleeves and fixed by corresponding screws. At the same time, the main shaft and the lower cross bar of the frame are also fixed by corresponding locking screws.

The beneficial effects of the utility model are:

The utility model can realize the switching of the brake standby state and the directional state of the baby stroller as the push rod is reversed forward and backward, and can also realize the exposure and hiding of the brake handle of the baby stroller as the push rod is reversed forward and backward, that is, the brake handle at the same side of the push rod is extended out of the lower cross bar of the frame, while the brake handle at the opposite position of the push rod is retracted into the lower cross bar of the frame. Not only can the three functions be switched at the same time in one operation, the operation is simple, and the user can be prevented from accidentally stepping on the brake handle in a non-standby state, thereby avoiding premature damage to the brake handle itself and its corresponding transmission components, and extending the service life.

At the same time, the utility model improves the original traction cable connection between the brake handle and the brake lock pressing mechanism into a transmission cross bar connection, thereby reducing the number of traction cables used inside the cross bar under the frame, simplifying the routing of the traction cables, and reducing the difficulty of installation and maintenance.

The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

FIG1 is a front perspective view of a baby stroller with the utility model installed at the front and rear and the push rod rotated to the rear position;

FIG2 is an internal structure diagram of FIG1 after removing part of the frame assembly;

FIG3 is an enlarged view of the structure on the lower crossbar of the frame in FIG2 ;

FIG4 is an enlarged view of the left side structure of the brake handle in FIG3 ;

FIG5 is an enlarged view of the right side structure of the brake handle in FIG3 (excluding the second traction wheel);

FIG6 is a schematic diagram of the structure inside the left frame joint in FIG3 ;

FIG7 is a side cross-sectional view of the left side frame joint in FIG3 ;

FIG8 is a rear perspective view of the baby stroller with the utility model installed at the front and rear and the push rod rotated to the rear position;

FIG9 is an internal structure diagram of FIG8 after removing part of the frame assembly;

FIG10 is an enlarged view of the structure on the lower crossbar of the frame in FIG9;

FIG11 is an enlarged view of the left side structure of the brake handle in FIG10 ;

FIG12 is an enlarged view of the right side structure of the brake handle in FIG10 (excluding the second traction wheel);

FIG13 is a schematic diagram of the structure inside the left frame joint in FIG10;

FIG14 is a side cross-sectional view of the left side frame joint in FIG10;

Fig. 15 is a bottom view of the lower crossbar of the frame at the brake handle position in Fig. 10;

FIG. 16 is a schematic structural diagram of the traction cam assembly of the utility model.

DETAILED DESCRIPTION

The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The descriptions herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

1-2 , the utility model provides a brake and directional transmission mechanism that can expose and hide the brake handle as the push rod changes direction. The mechanism is applied to a baby stroller, which mainly includes a push rod 38, a frame assembly, four wheel forks 41, four wheels 42, and the like. Among them, the frame assembly includes two front and rear frame lower cross bars 37, four frame side connecting rods 39 located at the left front, left rear, right front and right rear, and four frame joints 40 located at the left front, left rear, right front and right rear. The left and right ends of the two frame lower cross bars 37 are fixedly connected to the bottom end of the corresponding frame side connecting rod 39 through a corresponding frame joint 40, and the top ends of the two frame side connecting rods 39 on the left are rotatably connected to the left bottom end of the push rod 38. Similarly, the top ends of the two frame side connecting rods 39 on the right are rotatably connected to the right bottom end of the push rod 38. The bottom ends of the four frame joints 40 are each provided with a corresponding wheel fork 41, and a corresponding wheel 42 is provided between the two fork arms of each wheel fork 41.

In practical application, it is necessary to install a set of brake and directional transmission mechanism provided by the utility model at the front and rear of the same baby stroller. The brake and directional transmission mechanism located at one side of the front and rear of the baby stroller is used as an embodiment and described in detail.

Referring to FIG. 1-16 , a brake and directional transmission mechanism capable of revealing and hiding the brake handle as the push rod is reversed includes a main shaft 1 fixed inside the lower cross bar 37 of the frame. The specific fixing method is that a sleeve 35 is respectively provided on the opposite surfaces of the left and right frame joints 40, and the two ends of the main shaft 1 are respectively inserted into the left and right sleeves 35 and fixed by corresponding screws. At the same time, the main shaft 1 and the lower cross bar 37 of the frame are also fixed by corresponding locking screws, thereby realizing the fixation of the main shaft 1 inside the lower cross bar 37 of the frame.

The central part of the main shaft 1 is rotatably sleeved with a rotating block 2, and the rotating block 2 is provided with a first traction wheel mounting seat 14 and a brake handle slideway 15 in parallel on the left and right sides. The first traction wheel 3 is rotatably provided on the first traction wheel mounting seat 14, and a first torsion spring is provided between the first traction wheel 3 and the first traction wheel mounting seat 14, which can automatically reset the first traction wheel 3 to the clockwise direction. The brake handle 4 can be slidably arranged in the brake handle slide 15 forward and backward, and at the same time, a brake handle through hole 36 for the brake handle 4 to enter and exit is opened at the corresponding position of the lower cross bar 37 of the frame. The position of the brake handle through hole 36 corresponds to the position of the brake handle slide 15, and a sealing plate 13 for covering the brake handle through hole 36 is provided at the lower edge of the brake handle through hole 36. The sealing plate 13 is rotatably connected to the lower cross bar 37 of the frame through a corresponding rotating shaft and a torsion spring. When the brake handle 4 extends out of the brake handle through hole 36, the sealing plate 13 can automatically open under the thrust of the brake handle 4, and its rotation amount can meet the downward pressure amplitude of the brake handle 4. When the brake handle 4 is retracted into the brake handle through hole 36, the sealing plate 13 can automatically close under the action of its own torsion spring to seal the brake handle through hole 36.

The first traction wheel 3 is connected to the brake handle 4 through a toggle plate 5. One end of the toggle plate 5 is fixedly connected to the side of the first traction wheel 3, and the other end of the toggle plate 5 is connected to the side of the brake handle 4 in a left-right sliding manner. Specifically, the toggle plate 5 is integrally formed on the side wall of the first traction wheel 3 close to the brake handle 4, and the other end of the toggle plate 5 is fixedly penetrated with a sliding pin 16 perpendicular to the toggle plate 5. The side wall of the brake handle 4 close to the first traction wheel 3 is provided with a toggle plate mounting groove 17 for facilitating the toggle plate 5 to swing back and forth, and waist-shaped holes 18 for the sliding pin 16 to slide left and right are respectively provided on the upper and lower groove walls of the toggle plate mounting groove 17; the other end of the toggle plate 5 can be set in the toggle plate mounting groove 17 so as to swing back and forth, and the upper and lower ends of the sliding pin 16 can be slidably set in the upper and lower waist-shaped holes 18 respectively, and the first traction wheel 3 drives the toggle plate 5 to swing clockwise or counterclockwise by rotating clockwise or counterclockwise, thereby driving the brake handle 4 to extend or retract into the brake handle through hole 36.

When the first traction wheel 3 rotates clockwise, the toggle plate 5 can swing clockwise along with the first traction wheel 3 in the toggle plate mounting groove 17. During the clockwise swinging process, the sliding pin 16 moves from the right end to the left end of the waist-shaped hole 18, and at the same time pushes the brake handle 4 from the front to the rear of the brake handle slide 15, so that the pedal part of the brake handle 4 extends outward from the lower cross bar 37 of the frame through the brake handle through hole 36.

Conversely, when the first traction wheel 3 rotates counterclockwise, the toggle plate 5 can swing counterclockwise in the toggle plate mounting groove 17 along with the first traction wheel 3. During the counterclockwise swinging process, the sliding pin 16 moves from the left end to the right end of the waist-shaped hole 18, and at the same time pushes the brake handle 4 from the rear to the front of the brake handle slide 15, so that the pedal part of the brake handle 4 retracts inward through the brake handle through hole 36 into the lower cross bar 37 of the frame.

The upper surface of the pedal portion of the brake handle 4 is provided with concave-convex anti-skid patterns to increase the friction when the user steps on the brake handle 4 .

A T-shaped protrusion 19 is provided in the middle part of the upper surface of the brake handle slide 15 along its length direction, and a T-shaped groove 20 that can slidably cooperate with the T-shaped protrusion 19 is provided in the middle part of the lower surface of the brake handle 4 along its length direction. When the brake handle 4 is installed on the brake handle slide 15, the T-shaped protrusion 19 is embedded in the T-shaped groove 20 and is in a sliding connection relationship to improve the movement stability of the brake handle 4 on the brake handle slide 15.

The left and right ends of the rotating block 2 are respectively connected to the brake lock pressing mechanism installed in the left and right frame joints 40 through the corresponding push rod transmission assembly, and then the brake lock pressing mechanism transmits the brake lock pin to complete the plug-in cooperation between the brake lock pin and the brake disc on the wheel. Specifically, the push rod transmission assembly includes a first fixed block 21, a second fixed block 22, a first brake transmission cross bar 23, a second brake transmission cross bar 24, a first cross bar side push cam block 25 and a second cross bar side push cam block 27. The first fixed block 21 and the second fixed block 22 are both fixedly sleeved on the main shaft 1 and are respectively located on the left and right sides of the rotating block 2.

The first brake transmission cross bar 23 can be slidably disposed on the first fixed block 21, and the first cross bar side push cam block 25 is fixedly disposed on the left end of the rotating block 2. The left end of the first brake transmission cross bar 23 is fixedly connected with a wedge block 28, and the wedge block 28 can be slidably disposed inside the left frame joint 40, and is transmission-connected to the brake locking pressing mechanism installed in the left frame joint 40. The right end of the first brake transmission cross bar 23 is fixedly sleeved with a first spherical end cap 29, and the first spherical end cap 29 is in sliding contact with the first cross bar side push cam block 25.

Correspondingly, the second brake transmission cross bar 24 can be slid horizontally left and right through the second fixed block 22, the second cross bar side push cam block 27 is fixedly set on the right end of the rotating block 2, and the right end of the second brake transmission cross bar 24 is fixedly electrolyzed with a wedge block 28, and the wedge block 28 can be set horizontally left and right inside the right side frame joint 40, and is transmission connected to the brake locking pressing mechanism installed in the right side frame joint 40, and the left end of the second brake transmission cross bar 24 is fixedly sleeved with a second spherical end cap 31, and the second spherical end cap 31 is in sliding contact with the second cross bar side push cam block 27.

When the rotating block 2 rotates downward to its position, the first cross bar side push cam block 25 and the second cross bar side push cam block 27 at the left and right ends of the rotating block 2 rotate accordingly. At this time, the first spherical end cap 29 and the second spherical end cap 31 located on the left and right sides slide from the recessed area of the first cross bar side push cam block 25 and the second cross bar side push cam block 27 to the protruding area, thereby prompting the first brake transmission cross bar 23 and the second brake transmission cross bar 24 located on the left and right sides to form horizontal thrusts to the left and right respectively, thereby driving the wedge blocks 28 located on the left and right sides to move to the left and right respectively.

Correspondingly, when the rotating block 2 is rotated to the right position, the first cross bar side push cam block 25 and the second cross bar side push cam block 27 at the left and right ends of the rotating block 2 rotate accordingly. At this time, the first spherical end cap 29 and the second spherical end cap 31 located on the left and right sides slide from the protruding area of the first cross bar side push cam block 25 and the second cross bar side push cam block 27 to the recessed area, thereby prompting the first cross bar side push cam block 25 and the second cross bar side push cam block 27 to cancel the lateral thrust on the first brake transmission cross bar 23 and the second brake transmission cross bar 24 located on the left and right sides, and then cancel the lateral thrust on the wedge blocks 28 located on the left and right sides respectively.

The brake locking pressing mechanism applicable to the utility model mainly comprises a pressing transmission pin, a transmission pin return spring, a pressing transmission block, and a pressing swing block; the pressing transmission pin and the transmission return spring are installed inside the frame joint, and the pressing transmission block and the pressing swing block are installed inside the wheel fork.

When the inclined surface of the wedge block generates a lateral squeezing force on the top of the downward pressing transmission pin due to its own lateral movement and outward expansion, the downward pressing transmission pin overcomes the elastic force of the transmission pin return spring and moves downward as a whole, and the bottom end of the downward pressing transmission pin drives the downward pressing transmission block downward, and the downward pressing transmission block further drives the downward pressing swing block downward, and the downward pressing swing block finally drives the brake locking pin downward to be inserted into the brake disc on the wheel, thereby realizing wheel brake locking;

Conversely, when the inclined surface of the wedge block cancels the lateral squeezing force on the top end of the downward transmission pin due to its own lateral movement and inward retraction, the downward transmission pin moves upward as a whole and resets under the elastic force of the transmission pin reset spring, and the bottom end of the downward transmission pin immediately cancels the pressure on the downward transmission block, and the downward transmission block cancels the pressure on the downward swing block, and the downward swing block cancels the pressure on the brake locking pin, and the brake locking pin moves upward under the elastic force of the locking pin reset spring, and finally disengages from the brake disc on the wheel, thereby unlocking the wheel brake.

The first fixed block 21 and the second fixed block 22 constrain the rotating block 2 from the left and right sides, and can also improve the stability of the rotating block 2 when rotating on the main shaft 1 .

A second traction wheel mounting seat 26 is provided on the second fixed block 22, and the second traction wheel 6 is rotatably provided on the second traction wheel mounting seat 26, and a second reset torsion spring is provided between the second traction wheel 6 and the second traction wheel mounting seat 26 so as to automatically reset the second traction wheel 6 in the counterclockwise direction. A synchronous traction rope 11 is connected between the first traction wheel 3 and the second traction wheel 6. When the first traction wheel 3 rotates clockwise, the second traction wheel 6 will rotate counterclockwise driven by the synchronous traction rope 11, and when the first traction wheel 3 rotates counterclockwise, the second traction wheel 6 will rotate clockwise driven by the synchronous traction rope 11.

The first traction wheel 3 is located on the left side of the brake handle 4, and the second traction wheel 6 is located on the right side of the brake handle 4. A contact block 7 is provided at the right end of the rotating block 2, and a pushing block 8 for pushing the contact block 7 is provided on the left side of the second traction wheel 6. When the second traction wheel 6 rotates clockwise, the contact block 7 can rotate counterclockwise with the second traction wheel 6, and by pushing the contact block 7, the rotating block 2 is rotated from a low position to a high position, thereby driving the brake handle 4 to be lifted from the pressed position to the standby position.

Another important component of the utility model is a traction cam assembly 9 installed at the rotation connection between the push rod 38 and the frame side link 39. The first traction wheel 3 and the traction cam assembly 9 are connected by a main traction rope 10. The traction cam assembly 9 can release the main traction rope 10 when the push rod 38 turns toward the brake handle 4, and pull the main traction rope 10 when the push rod 38 turns away from the brake handle 4. Specifically, the traction cam assembly 9 includes a cam 901, an arc plate 902 and a force-bearing lug 903. The cam 901, the arc plate 902 and the force-bearing lug 903 are all located on the inner side of the rotation connection between the frame side link 39 and the push rod 38.

The cam 901 is fixedly connected to the inner end of the rotating shaft at the rotation connection between the push rod 38 and the frame side link 39, and is coaxial with the rotating shaft. The arc plate 902 surrounds the outside of the cam 901, one end of the arc plate 902 is hinged to the outer inner wall of the upper end cover of the frame side link 39, the other end of the arc plate 902 is fixedly connected to the upper end of the main traction rope 10 through the corresponding traction rope fixing pin, the lower end of the main traction rope 10 is fixedly connected to the first traction wheel 3, the force-bearing protrusion 903 is fixedly arranged on the side surface of the arc plate 902, and the protruding part of the force-bearing protrusion 903 contacts the arc surface of the cam 901.

When the push rod 38 turns to the side close to the brake handle 4, the cam 901 rotates together with the push rod 38 driven by the rotating shaft. During the rotation, the cam 901 cancels the outward squeezing force on the force-bearing protrusion 903, so that the arc plate 902 gradually rotates from the outward deflected position to the initial position, thereby no pulling force is generated on the main traction cable 10. At this time, the main traction cable 10 is in a released state.

Conversely, when the push rod 38 turns to the side away from the brake handle 4, the cam 901 rotates together with the push rod 38 driven by the rotating shaft. During the rotation, the cam 901 gradually forms an outward squeezing force on the force-bearing protrusion 903, so that the arc plate 902 gradually rotates from the initial position to the outward deflected position, thereby generating a pulling force on the main traction cable 10. At this time, the main traction cable 10 is in a pulling state.

The first traction wheel 3 and the second traction wheel 6 are respectively connected to the steering lock mechanism installed in the left and right frame joints 40 through the corresponding directional traction ropes 12. Specifically, the steering lock mechanism includes a directional plug 32, which is movably arranged inside the frame joint 40, and is provided with a plug tension spring 33 that allows the bottom end of the directional plug 32 to automatically extend out of the lower surface of the frame joint 40; at the same time, the top end of the wheel fork 41 is provided with a plug slot 34 for plugging and cooperating with the bottom end of the directional plug 32; the left end of the directional traction rope 12 located on the left side is connected to the top of the directional plug 32 inside it after extending into the frame joint 40 on the left side, and the right end of the directional traction rope 12 located on the right side is connected to the top of the directional plug 32 inside it after extending into the frame joint 40 on the left side.

The specific connection mode of each traction rope in the utility model is that two layers of traction rope embedding grooves are opened on the circumferential side wall of the first traction wheel 3, and one layer of traction rope embedding groove is opened on the circumferential side wall of the second traction wheel 6. The upper end of the main traction rope 10 is fixedly connected to one end of the arc plate 902 through the corresponding traction rope fixing pin, and the lower end of the main traction rope 10 is extended into the lower cross bar 37 of the frame through the inside of the frame side connecting rod 39 and the frame joint 40, and then fixedly connected to the upper part of the first layer of traction rope embedding groove of the first traction wheel 3 through the corresponding traction rope fixing pin. The left end of the synchronous traction rope 11 is fixedly connected to the upper part of the second layer of traction rope embedding groove of the first traction wheel 3 through the corresponding traction rope fixing pin, and the right end of the synchronous traction rope 11 is fixedly connected to the lower part of the traction rope embedding groove of the second traction wheel 6 through the corresponding traction rope fixing pin. The left end of the directional traction rope 12 on the left side is fixedly connected to the top of the directional plug 32 on the left side, and the right end of the directional traction rope 12 on the left side is fixedly connected to the lower part of the second layer of traction rope embedded groove of the first traction wheel 3 through the corresponding traction rope fixing pin. The right end of the directional traction rope 12 on the right side is fixedly connected to the top of the directional plug 32 on the right side, and the left end of the directional traction rope 12 on the right side is fixedly connected to the lower end of the traction rope embedded groove of the second traction wheel 6 through the corresponding traction rope fixing pin.

Since the wheel fork 41 is freely rotatably arranged at the bottom end of the frame joint 40, when the wheel fork 41 is used as the front wheel fork when the baby stroller moves forward, or when the wheel 42 is biased due to the steering, the directional latch 32 and the latch slot 34 are staggered up and down, so that the directional latch 32 cannot be automatically inserted into the latch slot 34, and the rear wheel of the baby stroller is in a steering free state; and when the wheel fork 41 is used as the rear wheel fork when the baby stroller moves forward, the wheel fork 41 is straightened due to the forward rolling of the wheel 42, and the latch slot 34 is horizontally rotated to the bottom of the directional latch 32, so that the directional latch 32 is automatically inserted into the latch slot 34 under the elastic force of the latch tension spring 33, and the rear wheel of the baby stroller is in a steering locked state;

Similarly, when the wheel fork 41 serves as the front wheel fork when the baby stroller moves forward, or is offset due to the steering of the wheel 42, the downward transmission pin and the downward transmission block are staggered up and down, causing the top of the downward transmission block to not contact the bottom end of the downward transmission pin, and the baby stroller is in a brake lock failure state; and when the wheel fork 41 serves as the rear wheel fork when the baby stroller moves forward, the wheel fork 41 is straightened due to the forward rolling of the wheel 42, and the downward transmission block rotates horizontally to the bottom of the downward transmission pin, causing the bottom end of the downward transmission pin to be aligned and contact with the top of the downward transmission block, and the baby stroller is in a brake lock effective state.

The working principle of the utility model is as follows:

When the push rod 38 turns to a position close to the brake handle 4, the traction cam assembly 9 converts the pulling of the main traction rope 10 to release, causing the first traction wheel 3 to rotate clockwise under the action of the first return torsion spring, and the toggle plate 5 swings clockwise with the first traction wheel 3, pushing the brake handle 4 from the front to the rear of the brake handle slide 15, so that the pedal part of the brake handle 4 extends outward from the lower cross bar 37 of the frame through the brake handle through hole 36. At the same time, the first traction wheel 3 converts the pulling of the synchronous traction rope 11 to release, causing the second traction wheel 6 to rotate counterclockwise under the action of the second return torsion spring. The clockwise rotation of the first traction wheel 3 and the counterclockwise rotation of the second traction wheel 6 will respectively convert the left and right directional traction ropes 12 from traction to release, thereby causing the directional pins 32 located in the left and right frame joints 40 to move downward under the elastic force of the pin tension springs 33, and then the bottom ends of the left and right directional pins 32 are respectively inserted into the pin slots 34 located at the top ends of the left and right wheel forks 41, finally achieving wheel steering locking. At this time, the brake handle 4 extends out of the lower cross bar 37 of the frame and is in a ready-to-step state, and the brake locking function on this side of the stroller is also in an effective state. When the user steps on the brake handle 4, the brake handle 4 drives the rotating block 2 to rotate downward, and the first cross bar side push cam block 25 and the second cross bar side push cam block 27 at the left and right ends of the rotating block 2 will respectively form horizontal thrusts to the left and right on the left and right first brake transmission cross bars 23 and the second brake transmission cross bars 24, thereby respectively driving the wedge blocks 28 located in the left and right frame joints 40 to move left and right, thereby prompting the left and right two sets of brake locking pressing mechanisms to respectively transmit the left and right brake locking pins, prompting the connection and matching between the car locking pins and the brake disc on the wheel, and finally realizing the locking of the wheel brake.

When the push rod 38 turns to a position away from the brake handle 4, the traction cam assembly 9 converts the main traction rope 10 from release to traction, prompting the first traction wheel 3 to overcome the elastic force of the first reset torsion spring and rotate counterclockwise, and the toggle plate 5 swings counterclockwise with the first traction wheel 3, pushing the brake handle 4 from the rear to the front of the brake handle slide 15, so that the footrest of the brake handle 4 is retracted inwardly into the lower cross bar 37 of the frame through the brake handle through hole 36. At the same time, the first traction wheel 3 converts the synchronous traction rope 11 from release to traction, prompting the second traction wheel 6 to overcome the elastic force of the second reset torsion spring and rotate clockwise, and the push block 8 will push the contact block 7 located on the right side of the rotating block 2 as the second traction wheel 6 rotates clockwise, so that the rotating block 2 is rotated upward and reset, and the brake handle 4 is also lifted up and reset together. After the rotating block 2 is rotated upward and reset, the first cross bar side push cam block 25 and the second cross bar side push cam block 27 at the left and right ends of the rotating block 2 will respectively cancel the left and right horizontal thrusts on the left and right first brake transmission cross bars 23 and the second brake transmission cross bars 24, thereby respectively canceling the left and right horizontal thrusts on the left and right wedge blocks 28, and the downward pressure received by the left and right two sets of brake locking downward pressure mechanisms are further canceled, thereby prompting the left and right car locking pins to move upward under the action of their respective reset springs, and respectively disengage from the brake discs of the left and right wheels 42, thereby finally achieving wheel brake locking. At the same time, the counterclockwise rotation of the first traction wheel 3 and the clockwise rotation of the second traction wheel 6 will respectively convert the release of the left and right directional traction cables 12 to traction, thereby causing the directional latches 32 located in the left and right frame joints 40 to move upward against the elastic force of the latch springs 33, thereby causing the bottom ends of the left and right directional latches 32 to disengage from the latch slots 34 located at the top ends of the left and right wheel forks 41, respectively, and finally achieving the steering lock of the wheels. At this time, the brake handle 4 is lifted up and retracted inwardly into the lower crossbar 37 of the frame, in a hidden state, and the brake locking function and directional locking function on this side of the stroller are both in an ineffective state.

It should be emphasized that after the push rod 38 is turned to a position away from the brake handle 4, the retraction and lifting of the brake handle 4, and the brake unlocking and directional unlocking of the wheel are almost completed simultaneously. After installing a set of the utility model on the front and rear sides of the baby stroller, the front and rear reversal of the push rod 38 can easily realize the switching of the brake standby state, the switching of the directional state, and the extension and retraction of the brake handle on the lower crossbar of the frame at one time.

The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims (10)

1. A brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing is characterized in that: the novel bicycle frame comprises a main shaft (1) fixedly arranged in a bicycle frame lower cross rod (37), a rotating block (2) is arranged on the main shaft (1), a first traction wheel (3) and a brake lever (4) capable of sliding forwards and backwards are arranged on the rotating block (2) side by side left and right, a stirring plate (5) is arranged between the first traction wheel (3) and the brake lever (4), one end of the stirring plate (5) is fixedly connected with the side part of the first traction wheel (3), the other end of the stirring plate (5) is connected with the side part of the brake lever (4) side by side, and a brake lever through hole (36) which is convenient for the brake lever (4) to come in and go out is formed in the bicycle frame lower cross rod (37). A second traction wheel (6) is arranged on the main shaft (1) positioned on the right side of the rotating block (2), a contact block (7) is arranged at the right end of the rotating block (2), and a pushing block (8) for pushing the contact block (7) is arranged on the left side of the second traction wheel (6); a traction cam disc assembly (9) is arranged at the rotary joint of a push rod (38) and a frame side connecting rod (39) of the baby stroller, a main traction rope (10) is connected between the first traction wheel (3) and the traction cam disc assembly (9), and a synchronous traction rope (11) is connected between the first traction wheel (3) and the second traction wheel (6); the left end and the right end of the rotating block (2) are respectively in transmission connection with a brake locking pressing mechanism arranged in the left frame joint (40) and the right frame joint through corresponding push rod transmission components; the first traction wheel (3) and the second traction wheel (6) are respectively in transmission connection with steering locking mechanisms arranged in the left frame joint (40) and the right frame joint through corresponding directional traction ropes (12).

2. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: the lower edge of the brake handle via hole (36) is provided with a sealing plate (13) for automatically covering the brake handle via hole (36) when the brake handle (4) is retracted into the frame lower cross bar (37).

3. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: the novel brake handle comprises a rotating block (2), wherein a first traction wheel mounting seat (14) and a brake handle slideway (15) are arranged on the rotating block (2) side by side left and right, a first traction wheel (3) is rotatably arranged on the first traction wheel mounting seat (14), a first torsion spring capable of enabling the first traction wheel (3) to automatically reset clockwise is arranged between the first traction wheel (3) and the first traction wheel mounting seat (14), the brake handle slideway (15) corresponds to the position of a brake handle through hole (36), and a brake handle (4) is arranged in the brake handle slideway (15) in a front-back sliding mode.

4. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: the poking plate (5) is integrally formed on the side wall of the first traction wheel (3) close to one side of the brake lever (4), a sliding pin (16) perpendicular to the poking plate (5) is fixedly arranged at the other end of the poking plate (5) in a penetrating mode, poking plate mounting grooves (17) which are convenient for the poking plate (5) to swing back and forth are formed in the side wall of the brake lever (4) close to one side of the first traction wheel (3), and waist-shaped holes (18) which are used for the sliding pin (16) to slide left and right are formed in the upper groove wall and the lower groove wall of the poking plate mounting grooves (17) respectively; the other end of the poking plate (5) can be arranged in the poking plate mounting groove (17) in a front-back swinging way, the upper end and the lower end of the sliding pin (16) can be respectively arranged in the upper waist-shaped hole (18) and the lower waist-shaped hole in a left-right sliding way, and the first traction wheel (3) drives the poking plate (5) to swing clockwise or anticlockwise through clockwise or anticlockwise rotation, so that the brake lever (4) is driven to extend or retract into the brake lever through hole (36).

5. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 3, wherein the mechanism is characterized in that: the brake crank slide (15) is characterized in that a T-shaped protruding block (19) is arranged in the middle of the upper surface of the brake crank slide (15) along the length direction of the brake crank slide, a T-shaped chute (20) which can be in sliding fit with the T-shaped protruding block (19) is arranged in the middle of the lower surface of the brake crank (4) along the length direction of the brake crank, and when the brake crank (4) is installed on the brake crank slide (15), the T-shaped protruding block (19) is embedded in the T-shaped chute (20) and is in sliding connection with the T-shaped chute, so that the moving stability of the brake crank (4) on the brake crank slide (15) is improved.

6. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: two layers of traction rope caulking grooves are formed in the circumferential side wall of the first traction wheel (3), and one layer of traction rope caulking groove is formed in the circumferential side wall of the second traction wheel (6); the lower end of the main traction rope (10) is fixedly connected with the upper part of the first layer traction rope caulking groove of the first traction wheel (3) through a corresponding traction rope fixing pin; the left end of the synchronous traction rope (11) is fixedly connected with the upper part of the traction rope caulking groove of the second layer of traction rope of the first traction wheel (3) through a corresponding traction rope fixing pin, and the right end of the synchronous traction rope (11) is fixedly connected with the lower part of the traction rope caulking groove of the second traction wheel (6) through a corresponding traction rope fixing pin; the right end of the directional traction rope (12) positioned at the left side is fixedly connected with the lower part of the second layer traction rope caulking groove of the first traction wheel (3) through a corresponding traction rope fixing pin; the left end of the directional traction rope (12) positioned on the right side is fixedly connected with the lower end of the traction rope caulking groove of the second traction wheel (6) through a corresponding traction rope fixing pin.

7. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: the traction cam disc assembly (9) comprises a cam (901), an arc plate (902) and a stress lug (903), wherein the cam (901), the arc plate (902) and the stress lug (903) are all positioned on the inner side surface of the rotating joint of the frame side connecting rod (39) and the push rod (38); wherein the cam (901) is fixedly connected with the inner end of a rotating shaft at the rotating connection part of the push rod (38) and the frame side connecting rod (39) and is coaxial with the rotating shaft; the arc plate (902) is surrounded outside the cam (901), one end of the arc plate (902) is hinged with the outer side inner wall of the upper end cover of the frame side connecting rod (39), the other end of the arc plate (902) is fixedly connected with the upper end of the main traction rope (10) through a corresponding traction rope fixing pin, the stress lug (903) is fixedly arranged on the side surface of the arc plate (902), and the protruding part of the stress lug (903) is in contact with the arc surface of the cam (901).

8. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: the push rod transmission assembly comprises a first fixed block (21), a second fixed block (22), a first brake transmission cross rod (23), a second brake transmission cross rod (24), a first cross rod side pushing cam block (25) and a second cross rod side pushing cam block (27); the first fixed block (21) and the second fixed block (22) are fixedly sleeved on the main shaft (1) and are respectively positioned at the left side and the right side of the rotating block (2); a second traction wheel mounting seat (26) is arranged on the second fixed block (22), the second traction wheel (6) is rotatably arranged on the second traction wheel mounting seat (26), and a second reset torsion spring capable of automatically resetting the second traction wheel (6) towards the anticlockwise direction is arranged between the second traction wheel (6) and the second traction wheel mounting seat (26);

The first brake transmission cross rod (23) can transversely slide left and right and is arranged on the first fixed block (21) in a penetrating manner, the first cross rod side pushing cam block (25) is fixedly arranged at the left end of the rotating block (2), the left end of the first brake transmission cross rod (23) is fixedly connected with a wedge block (28), the wedge block (28) can transversely move left and right and is arranged in the left frame joint (40) and is in transmission connection with a brake locking pushing mechanism arranged in the left frame joint (40), the right end of the first brake transmission cross rod (23) is fixedly sleeved with a first spherical end cap (29), and the first spherical end cap (29) is in sliding contact with the first cross rod side pushing cam block (25);

The second brake transmission cross rod (24) can transversely slide left and right and pass through the second fixed block (22), the second cross rod side pushing cam block (27) is fixedly arranged at the right end of the rotating block (2), a wedge block (28) is fixedly electrolyzed at the right end of the second brake transmission cross rod (24), the wedge block (28) can transversely move left and right and is arranged in a frame joint (40) at the right side and is in transmission connection with a brake locking pushing mechanism arranged in the frame joint (40) at the right side, a second spherical end cap (31) is fixedly sleeved at the left end of the second brake transmission cross rod (24), and the second spherical end cap (31) is in sliding contact with the second cross rod side pushing cam block (27).

9. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: the steering locking mechanism comprises a directional bolt (32), the directional bolt (32) is arranged in the frame joint (40) in a vertically movable way, and a bolt tension spring (33) which can enable the bottom end of the directional bolt (32) to automatically extend out of the lower surface of the frame joint (40) is sleeved on the directional bolt (32); meanwhile, a bolt slot (34) for being in plug-in fit with the bottom end of the directional bolt (32) is formed in the top end of the wheel fork (41); the left end of the directional traction rope (12) positioned at the left side is connected with the top of the directional bolt (32) inside the directional traction rope after extending into the frame joint (40) at the left side, and the right end of the directional traction rope (12) positioned at the right side is connected with the top of the directional bolt (32) inside the directional traction rope after extending into the frame joint (40) at the left side.

10. The brake and directional transmission mechanism capable of realizing brake crank dew storage along with push rod reversing according to claim 1, wherein the mechanism is characterized in that: the two opposite surfaces of the frame joint (40) are respectively provided with a sleeve (35), two ends of the main shaft (1) are respectively inserted into the two sleeves (35) and are locked and fixed through corresponding screws, and meanwhile, the main shaft (1) and the frame lower cross rod (37) are also fixed through corresponding locking screws.