CN201338695Y - Folding shopping bicycle - Google Patents

Abstract

The utility model relates to a folding shopping bicycle, which is provided with an auxiliary wheel by a main shaft of a frame; the auxiliary wheel comprises an upper seat, a supporting rod and at least one roller; the upper seat is fixed on the main shaft of the frame and is connected with the top end of the supporting rod by a rotary joint, and the supporting rod is provided with the roller; the supporting rod can be fixed at a first position and a second position by the rotary joint and can be switched between the first position and the second position; the first position is that the supporting rod interferes with the rotation space of a crank of the bicycle; the second position is the rotation space of the supporting rod separated from the crank of the bicycle. Therefore, the bicycle cannot be ridden under the condition that the auxiliary wheel lands, so that the auxiliary wheel is prevented from influencing the driving safety.

Description

folding shopping bike

technical field

The utility model relates to a foldable shopping cart. The foldable shopping cart has a device with both auxiliary wheels and parking columns.

Background technique

According to the research and development and practical experience of the applicant in this case, it is found that when a traditional folding bicycle is folded and used as a shopping trolley, it faces the following problems.

1. The traditional folding bicycle has a joint structure on the main pole of the frame. The joint structure uses a single pivot as a turning point. The bicycle is folded in half at the turning point to form a V shape. There is an angle between the front and rear body, and the front and rear wheels On the ground but not parallel so that it is difficult to push the bike after it is folded.

2. When the folded bicycle moves forward, the front wheel will be affected by the handle and sway, which will hinder the movement of the bicycle body.

3. When the folded bicycle moves forward with two wheels rotating forward, the crank and pedals will not rotate accordingly; but when the two wheels move backward in reverse, the crank and pedals will rotate in the opposite direction accordingly, and then with The vehicle body constitutes a blocking obstacle, so that the vehicle body cannot move.

4. A folding bicycle with auxiliary wheels. After the body is folded, the auxiliary wheels are placed on the ground to form a three-point support with the front and rear wheels, and can be used as a shopping trolley. However, when riding with the vehicle body unfolded, if the auxiliary wheels are not lifted off the ground, collisions and obstacles during driving will be increased, resulting in driving safety problems.

5. Due to the change of the angle of the bicycle body (the auxiliary wheels are shorter, the bicycle body is tilted forward), the folded bicycle shelf or storage basket will be inclined to the ground, causing the goods to be placed on it unstable.

Contents of the invention

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a foldable shopping bicycle, which controls the lifting and lowering of an auxiliary wheel with a simple and easy-to-operate scheme, so that the user can easily complete the lifting and folding of the auxiliary wheel, And the bicycle can only be ridden when the auxiliary wheel must be off the ground, so as to avoid the auxiliary wheel from affecting the driving safety.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A foldable shopping bicycle, the bicycle is provided with an auxiliary wheel with a main shaft of its frame; it is characterized in that:

The auxiliary wheel includes an upper seat, a support rod, and at least one roller; the upper seat is fixed on the main shaft of the vehicle frame, and is connected to the top of the support rod with a rotating joint, and the support rod provided with the above-mentioned rollers;

The support rod can be fixed at a first position and a second position by the rotating joint, and can switch and move between the first position and the second position; the The first position is that the support rod interferes with the turning space of the crank of the bicycle; the second position means that the supporting rod is out of the turning space of the crank of the bicycle.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of:

1. An auxiliary wheel is arranged on the main shaft of the frame of the bicycle. When the auxiliary wheel touches the ground, it interferes with the turning space of the crank of the bicycle, and when the auxiliary wheel leaves the ground, it breaks away from the turning space of the crank. According to Therefore, the bicycle cannot be ridden when the auxiliary wheels touch the ground, so as to prevent the auxiliary wheels from affecting driving safety.

2. The utility model proposes a composite solution of the auxiliary wheel and the parking post, and the auxiliary wheel can also have the function of the parking post, so as to achieve the convenience of use.

3. The utility model proposes a composite solution of auxiliary wheels and parking columns, which has the advantages of labor-saving operation and is convenient to use.

4. The utility model proposes an adjustment mechanism between the shelf and the frame of the bicycle to adjust the installation angle of the shelf so that the goods can be placed stably when the bicycle and the shopping cart are in use.

Description of drawings

Fig. 1 is the plane exterior view of bicycle, shows that the auxiliary wheel of the utility model is off the ground;

Fig. 2 is a three-dimensional exploded view of the first embodiment of the utility model auxiliary wheel;

Fig. 3 is a combined appearance diagram of the first embodiment of the utility model auxiliary wheel;

Fig. 4 is a side view of a bicycle folded into a shopping cart, and the auxiliary wheels are on the ground;

Fig. 5 is a plane view of a bicycle, showing that the auxiliary wheel of the utility model is on the ground;

Fig. 6 is a schematic plan view of the second embodiment of the auxiliary wheel composite parking column of the utility model;

Fig. 7 is a schematic cross-sectional view of the second embodiment of the auxiliary wheel composite parking column of the utility model;

Fig. 8 is a schematic plan view of the third embodiment of the auxiliary wheel composite parking column of the utility model;

Fig. 9 is a schematic cross-sectional view of the third embodiment of the utility model auxiliary wheel composite parking column;

Fig. 10 is a side view of a bicycle folded into a shopping trolley, and shows a schematic diagram of shelf adjustment;

Fig. 11 is an exploded view of an embodiment of a shelf cooperating with a foldable shopping trolley;

Fig. 12 is an assembled diagram of an embodiment of a shelf matched with a foldable shopping trolley.

Detailed ways

In order to illustrate the central idea of the utility model in the column of the above-mentioned content of the invention, it is expressed in specific embodiments. Various objects and their deformations or displacements in the embodiments are drawn in proportions suitable for illustration rather than in proportion to actual components, and are described first.

Fig. 1 shows a foldable bicycle, the type of described vehicle body is only convenient to explain the utility model, and the main technology of the utility model can be realized in various vehicle bodies, is not limited to the type shown in the illustration.

The main technology of the utility model relates to an auxiliary wheel 30 arranged on the main shaft 10 of the vehicle frame. As shown in FIG. 1 to FIG. 5 , it includes an upper seat 31 , a support rod 32 , at least one roller 33 and a spring 34 . The upper seat 31 has an upper fixing portion 311 and a lower fixing portion 315, and the upper fixing portion 311 is used to be fixed on the rear end of the main shaft 10 of the bicycle frame. The lower fixing part 315 is connected to the top end of the support rod 32 by a rotating joint 321 , and the above-mentioned roller 33 is provided at the bottom end of the support rod 32 . Each of the upper seat 31 and the support rod 32 has a spring contact 316 , 322 for connecting the above spring 34 . The left and right sides of the lower fixing part 315 each have a side limiting part 312 .

The support rod 32 can be fixed at a first position and a second position by its rotating joint 321 , and can move between the first position and the second position. The first position means that the support rod 32 is supported on the ground by the roller 33 , and the second position means that the support rod 32 makes the roller 33 leave the ground. When the support rod 32 is in the first position and the second position, it is respectively stopped by the above-mentioned side limiting portion 312 . When the support rod 32 is in the first position and the second position, the above-mentioned two spring contacts 316, 322 and the rotating contact 321 correspond to the three vertices of a triangle, so that the tension of the spring 34 acts on the support rod 32 and the upper seat 31, the support rod 32 is positioned against the side limiting portions 312, 323.

The upper fixing part 311 and the lower fixing part 315 are bent at a predetermined angle. When the support rod 32 is at the first position (that is, the roller 33 stands on the ground), it is affected by the The guiding effect of the lower fixing part 315 makes the support rod 32 tilt away from the frame spindle 10, thereby interfering with the turning space of the bicycle crank 13, so that the crank 13 cannot move smoothly. turn. When the support rod 32 is in the second position (that is, when the roller 33 leaves the ground), the support rod 32 is separated from the turning space of the bicycle crank 13, so that the crank 13 can rotate. When the bicycle is folded as a shopping trolley, the support bar 32 should be in the first position, and the roller 33 is on the ground to form a three-point support with the front wheel 15 and the rear wheel. When wanting to ride a bicycle, the support rod 32 must be at the second position and the roller 33 off the ground, otherwise the crank cannot be rotated, so this solution can completely avoid the problem that the auxiliary wheel 30 affects the driving safety. The support rod 32 can be controlled to switch between the first position and the second position by exerting force on the support rod 32 with the foot, and the method is simple and labor-saving.

The upper seat 31 has a support bar positioning structure for assisting the support bar 32 to be positioned at the first position or the second position.

The positioning structure of the support rod is shown in Figure 2 and Figure 3, the lower fixing part 315 has a raised point structure 317 that can form a moving point for the support rod 32, to assist the support rod 32 in The first position and the second position are positioned. When the user uses his feet to control the support rod 32 to pass through the raised point structure 317 , he must apply a little more force.

As shown in Fig. 6 and Fig. 7, a rotating shaft 60 is provided at the bottom end of the support rod 32, and the rotating shaft 60 is connected with a roller column 61, and the rotating shaft 60 rotates at a predetermined angle to control the landing of the roller column 61. Or leave the ground, and as the auxiliary wheel of folding bicycle or the parking column of bicycle. Wherein, the opposite contact surfaces of the support bar 32 and the roller column 61 respectively have an arc-shaped groove 325 and at least one pin 62, at least one end of the groove 325 is provided with a positioning hole 326, A spring 327 is sheathed on the rotating shaft 60 . When the support rod 32 is pulled apart by external force and rotated, the latch 62 can move along the groove 325 , and the latch 62 can be inserted into the positioning hole 326 to fix the support rod 32 . For example, in the embodiment of the present invention, two insertion pins 62 and three positioning holes 326 can be used to improve the positioning effect, keep the rotating shaft 60 stable and not shake, and reduce the wear of the shaft center.

As shown in Fig. 8 and Fig. 9, a rotating shaft 60 is provided at the bottom end of the support rod 32, and the rotating shaft 60 is connected with a roller column 61 and a parking column 63, and the rotating shaft 60 rotates a predetermined angle to control the The roller column 61 or the parking column 63 are on the ground. There is an arc-shaped groove 325 and a pin 62 on the opposite contact surfaces of the support rod 32 and the roller column 61, and at least one end of the groove 325 is provided with a positioning hole 326. A spring 327 is sleeved on the rotating shaft 60 . When the support rod 32 is pulled apart by external force and rotated, the latch 62 can move along the groove 325 , and the latch 62 can be inserted into the positioning hole 326 to fix the support rod 32 .

The above-mentioned groove 325 can be made into arcs with various circumferential angles as required, so that the support rod 32 can rotate at various expected angles, so that the roller column 61 and the parking column 63 can touch the ground and function.

The above-mentioned support rod 32 is a plate-like structure, and it can be welded to the lower edge of the bottom bracket of the car body with the arc-shaped opening 328 on the top. The lower end edge of the support rod 32 is lower than the lower edge profile of the bicycle chainring 80 . When the vehicle body leans forward when the roller column 61 is not on the ground, the bottom end of the support rod 32 will touch the ground to prevent the toothed plate 80 from colliding with the ground. Therefore, the support rod 32 has protective teeth The role of the disk 80. The above-mentioned support rod 32 can also be obliquely welded to the bottom bracket of the vehicle body. When the parking column 61 stands on the ground, the support rod 32 interferes with the turning space of the bicycle crank 13, so the parking column must be lifted off the ground. You can only ride a bicycle to ensure safe use.

As shown in Figure 10, in order to maintain stability when the bicycle is parked, the vehicle body is slightly inclined when parking, so the height of the roller 33 needs to be slightly higher than the ground, so that the vehicle body can smoothly tilt to the side, but when the bicycle is folded into a shopping cart and used At this time, the roller 33 needs to touch the ground, causing the vehicle body to tilt forward. The bicycle rack 70 or the storage basket originally parallel to the ground will be tilted due to the change of the angle of the vehicle body, causing the goods to be placed on it unstable. Therefore, the shelf 70 of the present utility model is rotatably mounted on the wheel axle of the vehicle body with two brackets 71, and an adjustment mechanism 72 is provided between the front end of the shelf 70 and the vehicle frame (such as the seat tube or the seat stay). The adjustment mechanism 72 described above can flexibly adjust the distance between the front end of the shelf 70 and the vehicle frame. For example, it can be a movable screw 73, one end of which is connected to the vehicle frame, and the other end is screwed to the front end of the shelf 70. Adjust the distance between the front end of the shelf 70 and the vehicle frame, so that the angle of the shelf 70 can be changed, so that the shelf 70 can be adjusted to the level of the ground (the above shelf can also be implemented in combination with the storage basket).

The adjustment mechanism 72 can also be shown in Figure 11 and Figure 12, the shelf 70 is provided with an adjustment frame 74, the rear end 741 of the adjustment frame 74 is connected to the rear end 701 of the shelf 70, and the The above-mentioned joint is the center of the circle and the adjustment frame 74 can be rotated to change the angle between the adjustment frame 74 and the shelf 70 . A rotatable adjustment frame 75 is arranged at the front end of the adjustment frame 74, and the adjustment frame 75 has a first frame body 751 and a second frame body 752, and the length of the second frame body 752 is longer than the The first frame body 751, the adjustment frame 75 is connected to the adjustment frame 74 by a rotation pivot 753, and can be rotated to make the first frame body 751 or the second frame body 752 face down. There are a plurality of adjustment holes 76 in the first frame body 751 and the second frame body 752 . The front end of the shelf 70 has an elastically movable spring fastener 77, and the spring fastener 77 can be snapped into an adjustment hole 76, for example, when the bicycle is folded into a shopping cart and used, because the roller 33 interferes with the On the ground, the vehicle body is caused to tilt forward, and now the snap fastener 77 is snapped into the adjustment hole 76 in the lower position, and the front end of the adjustment frame 74 is pulled up to keep it level with the ground.

As shown in Figure 1, the folding bicycle is respectively provided with a magnetic element 121, 122 at the predetermined position of the front fork and the rear fork, so that when the body is folded, the two magnetic elements 121, 122 are magnetically adsorbed, and the bicycle is parallel to the left and right after folding. There may be a relatively connected positioning relationship between the opposite front and rear wheels, so as to prevent the front wheels from swaying when the vehicle body moves, and to facilitate the movement of the vehicle body. In addition, a turning structure 14 enables the handlebars to be folded toward the front pole of the vehicle frame. Therefore, a magnetic element 123, 124 is respectively provided at the relative positions of the handlebar pole and the front pole of the vehicle frame, so as to facilitate the adsorption and positioning of the folded handlebars. .

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (10)

1. A foldable shopping bicycle, described bicycle is provided with an auxiliary wheel (30) with its vehicle frame main shaft (10); It is characterized in that: The auxiliary wheel (30) includes an upper seat (31), a support rod (32), and at least one roller (33); the upper seat (31) is fixed on the main frame main shaft (10), and A rotary joint (321) is used to connect the top of the support rod (32), and the above-mentioned roller (33) is provided on the support rod (32); The support rod (32) can be fixed at a first position and a second position by the rotation joint (321), and can be positioned at the first position and the second position Switching movement; the first position is that the support rod (32) interferes with the turning space of the crank (13) of the bicycle; the second position is that the support rod (32) breaks away from the The turning space of the crank (13) of the bicycle described above. 2. The folding shopping bicycle according to claim 1, characterized in that: the upper seat (31) has an upper fixing portion (311) and a lower fixing portion (315); the upper fixing portion (311) is fixed On the frame main shaft (10) of the bicycle; the described lower fixed part (315) is provided with the above-mentioned rotary joint (321) to connect the described support rod (32); the described upper fixed part (311) and The lower fixing part (315) is bent at a predetermined angle, so that the support rod (32) connected to the lower fixing part (315) interferes with the crank (13) of the bicycle in the first position. ) of the turning space, when in the second position, break away from the turning space of the crank (13) of the bicycle. 3. The foldable shopping bicycle according to claim 1, characterized in that: the upper seat (31) has a support rod (32) for assisting the positioning of the first position or the second position Two-position support rod positioning structure; the support rod positioning structure includes a concave or convex point structure arranged on the upper seat (31) to form a moving point for the support rod (32); the described The upper seat (31) and the support rod (32) each connect the two ends of a spring 34 with a spring contact (316, 322); the left and right sides of the upper seat (31) each have a The side limiting part (312) of the movement angle of the support rod (32). 4. The folding shopping bicycle according to claim 1, characterized in that: a rotating shaft (60) is provided at the bottom end of the support rod (32), and the rotating shaft (60) is pivotally connected to a roller column (61) , wherein, the support rod (32) is provided with a groove (325) on the contact surface with the roller column (61), and at least one positioning hole (326) is provided in the groove (325), A spring (327) is sheathed on the rotating shaft (60), and at least one pin (62) is provided on the contact surface of the roller column (61). 5. The folding shopping bicycle according to claim 4, characterized in that: the rotating shaft (60) is pivotally connected to a roller post (61) and a parking post (63). 6. The foldable shopping bicycle according to claim 5, characterized in that: the lower end edge of the support rod (32) is lower than the lower edge profile of the bicycle chainring (80). 7. The folding shopping bicycle according to claim 1, characterized in that: it also includes: a shelf (70), which is rotatably installed on the two ends of the rear wheel axle of the bicycle with two brackets (71) An adjustment mechanism (72) connected to the front end of the shelf (70) is used to adjust the inclination angle of the shelf (70); the adjustment mechanism (72) is a movable screw rod (73), so One end of the movable screw rod (73) is connected to the vehicle frame of the bicycle, and the other end is screwed to the front end of the shelf (70). 8. The folding shopping bicycle according to claim 1, characterized in that: it also includes: a shelf (70) fixed on the vehicle frame of the bicycle with two brackets (71), on the shelf (70) There is an adjustment frame (74), the rear end of the adjustment frame (74) is rotatably connected to the rear end of the shelf (70), and the front end of the adjustment frame (74) has an adjustment frame ( 75), the adjustment frame (75) has a plurality of adjustment holes (76), and the front end of the shelf (70) has an adjustable movable elastic fastener (77), and the elastic fastener (77) can be snapped into one of the adjustment holes (76) to adjust the angle between the adjustment frame (74) and the shelf (70). 9. The folding shopping bicycle according to claim 1, characterized in that: it also includes: a shelf (70) fixed on the vehicle frame of the bicycle with two brackets (71), on the shelf (70) There is an adjustment frame (74), the rear end of the adjustment frame (74) is rotatably connected to the rear end of the shelf (70), and the front end of the adjustment frame (74) is provided with a rotatable Adjustment frame (75), described adjustment frame (75) has a first frame body (751) and a second frame body (752), and described adjustment frame (75) is based on a rotating pivot (753) Connected to the adjustment frame (74); the first frame body (751) and the second frame body (752) have a plurality of adjustment holes (76); the front end of the shelf (70) has a Adjustable mobile spring fastener (77), the spring fastener (77) can be snapped into one of the adjustment holes (76), and adjust the adjustment frame (74) and the shelf (70 ) angle angle. 10. The foldable shopping bicycle according to claim 1, characterized in that: said bicycle is respectively provided with a magnetic element (121, 122) which can be relatively adsorbed at predetermined positions of the front fork and the rear fork; said bicycle includes A handle that can be turned, and the relative positions of the vertical rod of the handle and the front rod of the bicycle frame are respectively provided with a magnetic element (123, 124) that can be relatively adsorbed.

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