Brake mechanism of baby carriage
Technical Field
The invention relates to a brake mechanism, in particular to a brake mechanism for braking a rear wheel of a baby carrier.
Background
In order to eliminate the potential safety hazard of the stroller during parking, the stroller is generally provided with a brake mechanism, the brake mechanism in the prior art is complex in structure, a brake pedal needs to be hooked upwards by toes when the brake is released, the operation is inconvenient, the misoperation is easy, the vamp is polluted, and the safety performance and the convenience in use of the stroller are affected.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide the brake mechanism which is convenient and safe to operate and is not easy to stain the shoe upper.
In order to achieve the above purposes, the invention adopts the technical scheme that: the brake mechanism of the baby carrier has a brake state and an anti-brake state, the baby carrier comprises a frame support rod and wheels, two ends of the frame support rod are respectively fixedly connected with a wheel frame, and the wheels are rotatably arranged in the wheel frame; the actuating mechanisms are arranged on the wheel frames on the two sides and used for braking wheels on the two sides, and the driving mechanisms are used for driving the actuating mechanisms to act;
the driving mechanism comprises a base body which is fixed on the frame support rod and provided with a hollow cavity, a treading driving key is embedded into the base body at one side far away from the frame support rod, and a driving rack is arranged on the treading driving key; the wire winding machine is characterized in that a rotating shaft is further arranged in the seat body, a bidirectional main driving gear, a directional driving wheel and a wire winding seat which are meshed with each other are sleeved on the rotating shaft, and a driven gear meshed with the driving rack is arranged on the bidirectional main driving gear; two pull wires respectively connected with the actuating mechanism are arranged on the wire winding seat;
the actuating mechanism comprises a brake hub, a brake elastic sheet is arranged in the brake hub, one end of the brake elastic sheet is fixedly connected with the brake hub, the other end of the brake elastic sheet is fixedly connected with the stay wire, and a brake block for braking or releasing the brake of the wheel is arranged on the brake elastic sheet. The brake mechanism has the advantages that the brake mechanism is simple in structure, the wheels on two sides can be simultaneously in a brake and brake releasing state through the driving mechanism, operation is convenient, the brake and brake releasing are needed to be manually performed to tread the driving key, the shoe upper is not needed to be dirtied, misoperation can be avoided, and the use safety performance of the brake mechanism is improved.
Preferably, the seat body comprises a brake pedal upper cover and a brake pedal base which are mutually covered; the brake pedal upper cover is provided with a pedal through hole for protruding a treading area of the treading driving key to the outside of the seat body; brake pedal upper cover one end outwards extends and forms upper cover clamping part, brake pedal base one end outwards extends and forms and upper cover clamping part assorted base clamping part, upper cover clamping part and base clamping part place in vehicle frame support pole both sides to fix on vehicle frame support pole through the bolt. The brake pedal upper cover and the brake pedal base are combined and fixed on the frame supporting rod, so that the installation is convenient, and the maintenance of parts in the seat body is convenient.
Preferably, an annular guide groove is formed in the brake pedal base, one side, away from the base clamping portion, of the annular guide groove is provided with a guide notch, the treading driving key is arranged in the annular guide groove, and the driving rack is located in the guide notch. The guide notch can restrain the moving track of the driving rack, reduce the friction between the driving rack and the annular guide groove in the long-term use process, and increase the durability of the driving rack.
Preferably, the treading driving key comprises a horizontal plane plate, the bottom of the plane plate is provided with an annular guide pillar matched with the annular guide groove and a driving rack matched with the guide notch, the plane plate is provided with a treading key, and the edge of the treading key is positioned in the plane plate; brake pedal covers on and is provided with and tramples the footboard through-hole that the key appearance is unanimous, the marginal dimension of footboard through-hole is greater than the size of trampling the key but is less than the panel size for trample the key can imbed in the footboard through-hole and the panel can't break through the footboard through-hole.
Preferably, the bidirectional main driving gear comprises a first gear body, one end of the first gear body is provided with a driven gear meshed with the driving rack, and the other end of the first gear body is provided with a first oblique tooth groove; the driven gear and the first skewed tooth groove are circumferentially distributed on the first wheel body.
Preferably, the directional driving wheel comprises a second wheel body, one end of the second wheel body is provided with a second oblique tooth groove meshed with the first oblique tooth groove, and the other end of the second wheel body is provided with a third oblique tooth groove; the second skewed tooth groove and the third skewed tooth groove are circumferentially distributed on the second wheel body.
Preferably, one end of the wire winding seat is provided with a fourth skewed tooth groove meshed with the third skewed tooth groove, and the fourth skewed tooth grooves are circumferentially distributed on the wire winding seat.
Preferably, the bottom symmetry of brake hub is provided with brake guide block and brake holder, the one end inlay card of brake shell fragment extremely the brake holder, the other end of brake shell fragment bends into the U-shaped elbow, the U-shaped elbow with act as go-between links to each other, act as go-between places on the brake guide block.
Preferably, the U-shaped elbow is provided with a pull wire hole, and one end of the pull wire penetrates through the pull wire hole and is connected with the fixed block; the brake guide block is provided with a stay wire guide groove A for placing a stay wire; the outer wall of the brake hub is provided with a through hole which is convenient for the stay wire to be connected with the outside, and a limiting block is arranged on the stay wire between the through hole and the stay wire guide groove A. The fixed block is connected with the stay wire through threads, namely an internal thread hole is arranged in the fixed block, and an external thread matched with the internal thread hole is arranged at the end part of the stay wire; the limiting block can move on the pull wire, and the width of the limiting block is larger than that of the pull wire guiding groove A and used for limiting the moving position of the brake elastic sheet.
The invention is further improved in that in order to prevent the driving mechanism from being treaded down, a connecting rod parallel to the frame supporting rod is arranged below the frame supporting rod, two ends of the connecting rod are respectively and fixedly connected with one end of a second connecting piece, the other end of the second connecting piece is fixedly connected with the wheel frame, a first connecting piece is arranged between the frame supporting rod and the connecting rod, and two ends of the first connecting piece are respectively and fixedly connected with the frame supporting rod and the connecting rod. Thus, the treading driving mechanism can be leaned on the connecting rod to provide the pressure resistance.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a perspective view of the drive mechanism;
FIG. 3 is a view of the internal layout of the drive mechanism;
FIG. 4 is a brake hub internal component distribution diagram;
FIG. 5 is a perspective view of a bi-directional main drive gear
FIG. 6 is a perspective view of the directional drive wheel;
FIG. 7 is a perspective view of the take-up reel;
FIG. 8 is a perspective view of the step driving key;
FIG. 9 is a perspective view of the brake pedal base.
In the figure:
1-a drive mechanism; 11-brake pedal upper cover; 111-clamping bolt hole a; 112-an upper cover holder; 12-a brake pedal base; 121-a stay wire guide groove; 122-a base grip; 123-clamping bolt hole B; 124-a wire guide plate; 125-an annular channel; 126-guide notch; 127-a rotation hole; 13-depressing an actuation key; 131-a driving rack; 132-ring guide post; 133-a planar plate; 134-step key; 14-a rotating shaft; 15-a wire coiling seat; 151-fourth skewed tooth slot; 152-a wire drawing groove A; 153-stay wire groove B; 16-a directional drive wheel; 161-a second skewed tooth slot; 162-a third skewed tooth slot; 17-a bidirectional main drive gear; 171-driven gear; 172-a first skewed tooth slot; 18-a pull wire; 19-a limiting block; 20-fixing block; 2-a frame support bar; 3-a first connecting piece; 4-a connecting rod; 5-a second connector; 6-an actuator; 61-brake hub; 62-a brake clamping member; 63-brake spring plate; 631-U-bend; 64-brake blocks; 65-brake guide block; 7-a wheel; and 8, wheel frame.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1, the brake mechanism of the baby carriage in the embodiment has a braking state and a releasing state, the baby carriage comprises a frame support rod 2 and wheels 7, two ends of the frame support rod 2 are fixedly connected with wheel frames 8 respectively, and the wheels 7 are rotatably arranged in the wheel frames 8. The brake mechanism comprises an actuating mechanism 6 for braking or braking of the wheels and a driving mechanism 1 for driving the actuating mechanism 6 to act. Further, the actuating mechanisms 6 are respectively arranged on the wheel frames 8 at the two sides and used for braking the wheels at the two sides, and the driving mechanism 1 is connected with the actuating mechanisms 6 at the two sides to drive the actuating mechanisms 6 at the two sides to be simultaneously linked so that the actuating mechanisms 6 at the two sides are simultaneously in a braking or braking releasing state.
Referring to fig. 1 and 2, the driving mechanism 1 includes a brake pedal upper cover 11 and a brake pedal base 12, one end of the brake pedal upper cover 11 extends outward to form an upper cover clamping portion 112, an inward concave clamping groove a is formed on the upper cover clamping portion 112, and a clamping bolt hole a111 is formed at an end of the upper cover clamping portion 112; one end of the brake pedal base 12 extends outwards to form a base clamping portion 122, an inner concave clamping groove B is formed in the base clamping portion 122, and a clamping bolt hole B123 is formed in the end portion of the base clamping portion 122; wherein the clamping groove A and the clamping groove B are mutually matched and can be installed on the frame support rod 2, the clamping bolt hole A111 and the clamping bolt hole B123 are mutually matched and can fix the brake pedal upper cover 11 and the brake pedal base 12 on the frame support rod 2 through bolts.
In order to conveniently install the driving mechanism 1 on the baby carriage, a connecting rod 4 parallel to the frame supporting rod 2 is arranged below the frame supporting rod 2, two ends of the connecting rod 4 are fixedly connected with one end of a second connecting piece 5 respectively, the other end of the second connecting piece 5 is fixedly connected with a wheel frame 8, a first connecting piece 3 is arranged between the frame supporting rod 2 and the connecting rod 4, and two ends of the first connecting piece 3 are fixedly connected with the frame supporting rod 2 and the connecting rod 4 respectively. The bottom of the brake pedal base 12 is provided with a screw positioning hole A, the connecting rod 4 is provided with a screw positioning hole B matched with the screw positioning hole A, and the brake pedal base 12 can be fixed on the connecting rod 4 through screws during installation. Therefore, both ends of the driving mechanism 1 can be fixed, and the stability of the driving mechanism in a stress state is facilitated.
Referring to fig. 3 and 9, an annular guide groove 125 is formed in the brake pedal base 12, a guide notch 126 is formed in the annular guide groove 125 on a side away from the base clamping portion 122, and the treading driving key 13 is arranged in the annular guide groove. The brake pedal base 12 at the front end of the annular guide groove 125 is provided with a pair of rotating holes 127, the rotating holes 127 are used for placing the rotating shaft 14, and the rotating shaft 14 is provided with a bidirectional main driving gear 17, a directional driving wheel 16 and a wire winding seat 15 which are in meshed transmission with each other. A wire guide plate 124 is provided on the brake pedal base 12 at the front end of the rotation hole 127 for guiding the wire drawn from the wire winding seat 15. The brake pedal base 12 which is contacted with the frame support rod 2 is provided with a stay wire guide groove 121, the frame support rod 2 corresponding to the stay wire guide groove 121 is provided with a stay wire guide hole, and a stay wire enters the wheel frame 8 through the stay wire guide hole and is connected with the actuating mechanism 6 after passing through the wheel frame 8. As shown in fig. 7, the wire winding seat 15 is provided with two wire drawing grooves, namely a wire drawing groove a152 and a wire drawing groove B153, for respectively driving the actuators on the wheels on both sides.
As shown in fig. 8, the step driving key 13 includes a horizontal plane plate 133, the bottom of the plane plate 133 is provided with an annular guide post 132 matching with the annular guide groove 125 and a driving rack 131 matching with the guide notch 126, the plane plate 133 is provided with a step key 134, and the edges of the step key 134 are all located in the plane plate 133. As shown in fig. 2, the brake pedal upper cover 11 is provided with a pedal through hole having a shape consistent with the shape of the step key 134, and the edge size of the pedal through hole is larger than the size of the step key 134 but smaller than the size of the plane plate 133, so that the step key 134 can be embedded into the pedal through hole, and the plane plate 133 is blocked by the pedal through hole and cannot break through the pedal through hole. In the actual assembly process, after the spring is placed in the annular guide post 132, the annular guide post 132 is placed in the annular guide groove 125, and the brake pedal upper cover 11 is placed thereon, so that the step key 134 is inserted into the pedal through hole. Thus, when a user steps on the stepping key, the driving rack 131 moves downwards, and when the stepping block 134 is released, the driving rack 131 moves upwards under the action of the spring.
As shown in fig. 3, 5, 6 and 7, the bidirectional main driving gear 17 includes a first gear body, one end of which is provided with a driven gear 171 engaged with the driving rack 131, and the other end of which is provided with a first skewed tooth slot 172; the driven gear 171 and the first skewed tooth slot 172 are both evenly distributed on the first wheel body along the circumferential direction. The directional driving wheel 16 comprises a second wheel body, one end of the second wheel body is provided with a second skewed tooth groove 161 meshed with the first skewed tooth groove 172, and the other end of the second wheel body is provided with a third skewed tooth groove 162; the second skewed tooth slots 161 and the third skewed tooth slots 162 are uniformly distributed on the second wheel body along the circumferential direction. One end of the winding seat 15 is provided with a fourth skewed tooth slot 151 engaged with the third skewed tooth slot 162, and the fourth skewed tooth slots 151 are uniformly distributed on the winding seat 15 along the circumferential direction. Thus, under the action of the driving rack 131, the bidirectional main driving gear 17, the directional driving wheel 16 and the wire winding seat 15 synchronously rotate, and further the tensile operation of the wire on the wire winding seat 15 is driven, and further the actuating mechanism 6 is driven to brake or brake the wheel.
As shown in fig. 4, the actuator 6 includes a brake hub 61 having a bowl-shaped structure, and a rotating shaft hole is formed in the middle of the brake hub 61 for connecting with the wheel frame 8. The bottom of the brake hub 61 is symmetrically provided with a brake guide block 65 and a brake clamping member 62, the inner side wall of the brake hub 61 is provided with a brake elastic sheet 63, one end of the brake elastic sheet 63 is embedded into the brake clamping member 62, the other end of the brake elastic sheet 63 is bent into a U-shaped elbow 631, the U-shaped elbow 631 is provided with a pull wire hole, and the pull wire 18 penetrates through the pull wire hole and is connected with the fixed block 20 at the end part of the pull wire 18; the brake spring 63 facing one side of the rotating shaft hole is provided with a brake block 64, the brake block 64 is not in contact with a brake disc on the wheel 7 when in an unlocking state, and the brake block 64 tightly holds the brake disc on the wheel 7 when in a braking state, and the brake disc is fixedly connected with the wheel 7. The brake guide block 65 is provided with a cable guide groove a in which the cable 18 is placed. The outer wall of the brake hub 61 is provided with a through hole, and the pull wire 18 passes through the through hole and then is connected with the external driving mechanism 1. A stopper 19 is provided on the wire 18 located between the through hole and the wire guide groove a. In this embodiment, a vertical slot is disposed on the brake clamping member 62, and one end of the brake spring 63 is bent along the outer wall of the brake clamping member 62, and the end thereof is embedded into the slot.
The working process of the brake mechanism is as follows:
when the brake mechanism needs to be released from the braking state, namely the trampling driving key 13 is released, the driving rack 131 moves upwards and drives the bidirectional main driving gear 17 to rotate clockwise, so as to drive the directional driving wheel 16 and the wire winding seat 15 to rotate clockwise, and at the moment, the pull wire 18 on the wire winding seat 15 is released, so that the brake elastic sheet 63 is restored, and the brake block 64 is driven to be in the releasing state. Similarly, when the foot is stepped on the stepping key 134, the driving rack 131 moves downwards and drives the bidirectional main driving gear 17 to rotate anticlockwise, so as to drive the directional driving wheel 16 and the winding seat 15 to rotate anticlockwise, and at this time, the pull wire 18 on the winding seat 15 is tightened, so that the brake elastic sheet 63 is in a tensioned state, and the brake block 64 is driven to be in a braking state.
In conclusion, the brake mechanism disclosed by the invention is simple in structure, the wheels on two sides can be in the brake and brake release states simultaneously through the drive mechanism, the operation is convenient, and the brake and brake release states both need to be realized by manually treading down the treading drive key, so that the misoperation can be avoided, and the use safety performance of the brake mechanism is improved.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.