CN220076413U - Pedal type auxiliary wheel folding mechanism and two-wheel handcart - Google Patents
Pedal type auxiliary wheel folding mechanism and two-wheel handcart Download PDFInfo
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- CN220076413U CN220076413U CN202321539275.3U CN202321539275U CN220076413U CN 220076413 U CN220076413 U CN 220076413U CN 202321539275 U CN202321539275 U CN 202321539275U CN 220076413 U CN220076413 U CN 220076413U
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- 230000011514 reflex Effects 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of trolleys, in particular to a pedal type auxiliary wheel folding mechanism and a two-wheel trolley.
Description
Technical Field
The utility model relates to the technical field of trolleys, in particular to a pedal type auxiliary wheel folding mechanism and a two-wheel trolley.
Background
A cart is a small wheeled transport device that can carry items, typically consisting of a fixed platform and a set of rotatable direction wheels, to provide easy transport of items, and is widely used in home, business, and industrial settings.
The utility model discloses a dual-purpose goods handcart of universal wheel in chinese patent publication No. CN207773182U, including freight backrest, freight backrest's bottom is provided with two universal wheels, and two rubber wheels (i.e. auxiliary wheel) are installed through supporting wheel subassembly (i.e. folding mechanism) to the middle part below of freight backrest, and supporting wheel subassembly can open and shut, and after supporting wheel subassembly was expanded, whole handcart can incline to push, through the combined action of universal wheel and rubber wheel this moment, can make the pushing process more convenient, laborsaving and stable.
Although carts like the one described above have been able to meet most of the use needs in daily life and work, the following disadvantages still remain:
1. no corresponding structure is arranged to ensure that the supporting wheel component (namely the folding mechanism) of the handcart is stably kept in an unfolding or containing state;
2. the supporting wheel assembly (i.e., the folding mechanism) of the trolley is more suitable for being operated by hand, and the operation is inconvenient.
Disclosure of Invention
In order to be able to operate the folding mechanism more conveniently and to enable the folding mechanism to remain stable after deployment or storage, the utility model provides a pedal-assisted wheel folding mechanism and a two-wheel trolley.
In a first aspect, the present utility model provides a pedal-assisted wheel folding mechanism, which adopts the following technical scheme:
the pedal type auxiliary wheel folding mechanism comprises a frame, a first folding rod, a second folding rod, a clamping block and a gas spring, wherein the frame is provided with an auxiliary wheel, the frame, the first folding rod and the second folding rod are used for being hinged with the head and the tail of a handcart so as to form a four-bar mechanism, the clamping block is arranged between the first folding rod and the second folding rod, and two ends of the gas spring are respectively hinged with the first folding rod and the second folding rod;
still include first footboard, second footboard and receiving mechanism, first footboard sets up on the frame, receiving mechanism activity sets up on the frame and be used for controlling after the expansion first folding pole swing, the second footboard sets up on the receiving mechanism.
Preferably, the storage mechanism comprises a control rod, a rotating block and a torsion spring, wherein the rotating block is hinged to the frame, the rotating block is used for controlling the first folding rod to swing after being unfolded, the torsion spring is connected between the rotating block and the frame, the control rod is fixed on the rotating block, and the second pedal is fixed on the control rod.
Preferably, the first folding rod is an H-shaped connecting rod, the second folding rod is an I-shaped connecting rod, and the number of the second folding rods is two.
Preferably, the rotating block comprises two parallel rotating pieces and an abutting block arranged between the two rotating pieces, and the rotating block abuts against the first folding rod through the abutting block.
Preferably, the abutting block is in a cylindrical shape, and the rotating block abuts against the first folding rod through the circumferential outer surface of the abutting block.
Preferably, the number of the first pedals is two, and the two first pedals are respectively arranged at the left side and the right side of the frame.
Preferably, the auxiliary wheel is a universal wheel.
In a second aspect, the present utility model provides a two-wheeled cart, which adopts the following technical scheme:
the utility model provides a two-wheeled handcart, includes frame and above-mentioned auxiliary wheel folding mechanism, one side of frame is provided with the year thing board and the opposite side is provided with two mount pads, two the main wheel is installed respectively to the mount pad, auxiliary wheel folding mechanism articulates respectively on the mount pad with on the frame.
The beneficial effects of the utility model are as follows:
when the auxiliary wheel folding mechanism needs to be unfolded, the first pedal is stepped to enable the frame to swing, the frame drives the first folding rod and the second folding rod in the four-bar mechanism to be unfolded gradually, in the unfolding process, the included angle a between the first folding rod and the second folding rod is gradually changed from an acute angle (a <90 ℃) to an obtuse angle (90 ° < a <180 ℃) and then gradually changed from a reflex angle (180 ° < a <360 ℃), after the folding mechanism is unfolded to the reflex angle, the folding mechanism is clamped under the action of the clamping block, in the process, the gas spring is compressed synchronously, and finally the first folding rod and the second folding rod keep a stable clamping state under the reactive force of the gas spring, so that the auxiliary wheel folding mechanism keeps a stable unfolding state; when the auxiliary wheel folding mechanism is required to be folded and stored, the storage mechanism swings through stepping on the second pedal, the storage mechanism controls the first folding rod to swing again to be separated from the clamping state, and then the four-bar mechanism automatically realizes folding under the reaction force of the gas spring; in summary, the unfolding and folding processes of the auxiliary wheel folding mechanism can be controlled by stepping, so that the auxiliary wheel folding mechanism has the effect of convenient operation compared with the manual control, and can keep a stable unfolding or folding storage state under the action of the gas spring.
Drawings
FIG. 1 is a front view of a folding mechanism for a stepped auxiliary wheel in an embodiment of the present utility model;
FIG. 2 is a perspective view of a folding mechanism for a pedaling auxiliary wheel in an embodiment of the utility model;
FIG. 3 is a partial block diagram of a folding mechanism for a pedaling auxiliary wheel in an embodiment of the utility model;
FIG. 4 is an overall block diagram of a two-wheeled cart in accordance with an embodiment of the present utility model;
reference numerals illustrate: 1. a frame; 11. an auxiliary wheel; 21. a first folding bar; 22. a second folding bar; 3. a clamping block; 31. a blocking portion; 4. a gas spring; 5. a connecting sheet; 61. a first pedal; 62. a second pedal; 71. a control lever; 72. a rotating block; 73. a torsion spring; 8. a frame; 81. a carrying plate; 82. and a main wheel.
Detailed Description
The utility model will be further described with reference to figures 1-4 and examples.
The embodiment discloses a pedal type auxiliary wheel folding mechanism.
Referring to fig. 1 to 4, the pedal-powered auxiliary wheel folding mechanism includes a frame 1, a first folding bar 21, a second folding bar 22, a latch 3, a gas spring 4, and an auxiliary wheel 11, wherein the frame 1, the first folding bar 21, and the second folding bar 22 are used to hinge with the head and tail of the cart to form a four-bar mechanism, and the latch 3 is disposed between the first folding bar 21 and the second folding bar 22. Specifically, the frame 1 is hinged to the first folding bar 21 through the middle part thereof and is hinged to the trolley through the bottom part thereof, and the hinge position between the second folding bar 22 and the trolley is higher than the hinge position between the frame 1 and the trolley, so that the downward swinging process of the frame 1 is the unfolding process of the auxiliary wheel folding mechanism, the upward swinging process of the frame 1 is the folding and storage process of the auxiliary wheel folding mechanism, and when the auxiliary wheel folding mechanism is unfolded, the included angle between the lower end surfaces of the first folding bar 21 and the second folding bar 22 is a reflex angle (180 ° < a <360 °), and when the auxiliary wheel folding mechanism is folded and stored, the included angle between the lower end surfaces of the first folding bar 21 and the second folding bar 22 is an acute angle (a <90 °), so that the first folding bar 21 and the second folding bar 22 are in an inverted V-shaped state after folding. The purpose of the fixture block 3 is that: when the included angle between the first folding bar 21 and the second folding bar 22 is the reflex angle, the clamping block 3 can enable the first folding bar 21 and the second folding bar 22 to be in a clamping state.
Referring to fig. 1 and 2, two ends of the gas spring 4 are hinged to the first folding rod 21 and the second folding rod 22, respectively, specifically, the fixed end of the gas spring 4 is hinged to the first folding rod 21, the telescopic end of the gas spring 4 is hinged to the second folding rod 22, in this embodiment, the second folding rod 22 is hinged to the telescopic end of the gas spring 4 through a connecting piece 5, that is, the connecting piece 5 is fixed relative to the second folding rod 22, and the connecting piece 5 is hinged to the telescopic end of the gas spring 4.
Referring to fig. 1 and 2, the pedal-assisted wheel folding mechanism further includes a first pedal 61, a second pedal 62, and a storage mechanism, the first pedal 61 being provided on the frame 1, the storage mechanism being movably provided on the frame 1 and for controlling the swing of the unfolded first folding lever 21, the second pedal 62 being provided on the storage mechanism. Specifically, the storage mechanism includes a control lever 71, a rotating block 72, and a torsion spring 73, the rotating block 72 is hinged to the frame 1, the hinge position between the frame 1 and the rotating block 72 is lower than the hinge position between the frame 1 and the first folding lever 21, and higher than the hinge position between the frame 1 and the cart, the rotating block 72 can be abutted to the bottom of the first folding lever 21, and the rotating block 72 can control the unfolded first folding lever 21 to swing through rotation. A torsion spring 73 is connected between the rotating block 72 and the frame 1, the torsion spring 73 serving to provide a return effect for the rotating block 72. The control lever 71 is fixed to the rotating block 72, and the second pedal 62 is fixed to the control lever 71.
Through the arrangement, when the auxiliary wheel folding mechanism needs to be unfolded, the frame 1 swings by stepping on the first pedal 61, the frame 1 drives the first folding rod 21 and the second folding rod 22 in the four-bar mechanism to be gradually unfolded, in the unfolding process, the included angle a between the first folding rod 21 and the second folding rod 22 is gradually changed from an acute angle (a <90 degrees) to an obtuse angle (90 degrees < a <180 degrees) and then from a reflex angle (180 degrees < a <360 degrees), and after the auxiliary wheel folding mechanism is unfolded to the reflex angle, the clamping is realized under the action of the clamping block 3, in the process, the gas spring 4 is synchronously compressed, and finally the first folding rod 21 and the second folding rod 22 are kept in a stable clamping state under the reactive force of the gas spring 4, so that the auxiliary wheel folding mechanism keeps a stable unfolding state. When the auxiliary wheel folding mechanism needs to be folded and stored, the storage mechanism swings by stepping on the second pedal 62, and then the storage mechanism controls the first folding rod 21 to swing so as to be separated from the clamping state, and then the four-bar mechanism automatically realizes folding under the reaction force of the gas spring 4. In summary, the process of unfolding and folding and storing the auxiliary wheel folding mechanism of the present utility model can be controlled by stepping, which has the effect of convenient operation compared with the manual control, and the auxiliary wheel folding mechanism of the present utility model can maintain a stable unfolded or folded and stored state under the action of the gas spring 4.
Referring to fig. 2 and 3, in order to achieve that the clamping block 3 can generate a clamping effect when the included angle of the first folding bar 21 and the second folding bar 22 is a reflex angle, the clamping block 3 is disposed on the hinge shaft between the first folding bar 21 and the second folding bar 22, the clamping block 3 is relatively fixed to the first folding bar 21, the blocking portion 31 is configured on the surface of the clamping block 3, and when the included angle of the first folding bar 21 and the second folding bar 22 is a reflex angle, the blocking portion 31 of the clamping block 3 blocks further rotation between the first folding bar 21 and the second folding bar 22, thereby generating a clamping effect, and then the second folding bar 22 abuts against the blocking portion 31 of the clamping block 3 under the reaction force of the gas spring 4, thereby generating a stable clamping effect.
Referring to fig. 1 and 2, the first folding bar 21 is an H-shaped bar, the second folding bar 22 is an I-shaped bar, the number of the second folding bars 22 is two, two sets of four bar linkages can be formed by using the H-shaped bar as the first folding bar 21 and using two I-shaped bars as the second folding bar 22, stability of the unfolding process and folding and storing process of the auxiliary wheel folding mechanism is improved, and linkage relationship between the two sets of four bar linkages can be formed by using the H-shaped bar as the first folding bar 21, synchronism of the two sets of four bar linkages is improved, and the storing mechanism only needs to be provided with one set.
Referring to fig. 1 and 2, the rotating block 72 includes two parallel rotating pieces and an abutting block disposed between the two rotating pieces, and in this embodiment, the abutting block is in a cylindrical shape, and the rotating block 72 abuts the first folding bar 21 through a circumferential outer surface of the abutting block, so that sliding friction force generated in the process of controlling the first folding bar 21 to swing can be reduced by the rotating block 72, thereby reducing abrasion and making the control process smoother.
Referring to fig. 1 and 2, the number of the auxiliary wheels 11 is one, and the auxiliary wheels 11 are rotatably provided at the top of the frame 1, and in this embodiment, the auxiliary wheels 11 are universal wheels, so that the auxiliary wheels 11 can also play a steering effect at the same time. The number of the first pedals 61 is two, the two first pedals 61 are respectively arranged at the left side and the right side of the frame 1 and are simultaneously distributed at the left side and the right side of the auxiliary wheel 11, and the arrangement of the two first pedals 61 is convenient for an operator to control the unfolding of the auxiliary wheel folding mechanism by using the left foot and the right foot.
The embodiment also discloses a two-wheeled handcart.
Referring to fig. 4, the two-wheeled cart includes a frame 8 and the above-described auxiliary wheel folding mechanism, one side of the frame 8 is provided with a carrier plate 81 and the other side is provided with two mounting seats, the two mounting seats are respectively mounted with a main wheel 82, a second folding bar 22 of the auxiliary wheel folding mechanism is hinged on the frame 8 and the frame 1 is hinged on the two mounting seats. After installing above-mentioned auxiliary wheel folding mechanism to two-wheeled handcart on, when needs push-and-pull handcart, can expand auxiliary wheel folding mechanism fast through the mode of trampling to can stably push-and-pull handcart after expanding, when needs handcart accomodate, can fold auxiliary wheel folding structure through the mode of trampling equally and accomodate fast, and can stably keep folding storage state after folding storage. The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. The utility model provides a trample auxiliary wheel folding mechanism and two-wheeled handcart which characterized in that: the folding device comprises a frame (1), a first folding rod (21), a second folding rod (22), a clamping block (3) and a gas spring (4), wherein the frame (1) is provided with an auxiliary wheel (11), the frame (1), the first folding rod (21) and the second folding rod (22) are hinged with the head and the tail of a handcart to form a four-bar mechanism, the clamping block (3) is arranged between the first folding rod (21) and the second folding rod (22), and two ends of the gas spring (4) are respectively hinged with the first folding rod (21) and the second folding rod (22);
the folding device further comprises a first pedal (61), a second pedal (62) and a containing mechanism, wherein the first pedal (61) is arranged on the frame (1), the containing mechanism is movably arranged on the frame (1) and used for controlling the unfolded first folding rod (21) to swing, and the second pedal (62) is arranged on the containing mechanism.
2. A pedal-assisted wheel folding mechanism and two-wheeled cart according to claim 1, wherein: the storage mechanism comprises a control rod (71), a rotating block (72) and a torsion spring (73), wherein the rotating block (72) is hinged to the frame (1), the rotating block (72) is used for controlling the first folding rod (21) to swing after being unfolded, the torsion spring (73) is connected between the rotating block (72) and the frame (1), the control rod (71) is fixed to the rotating block (72), and the second pedal (62) is fixed to the control rod (71).
3. A pedal-assisted wheel folding mechanism and two-wheeled cart according to claim 1, wherein: the first folding rods (21) are H-shaped connecting rods, the second folding rods (22) are I-shaped connecting rods, and the number of the second folding rods (22) is two.
4. A pedal-assisted wheel folding mechanism and two-wheeled cart according to claim 2, wherein: the rotating block (72) comprises two parallel rotating pieces and an abutting block arranged between the two rotating pieces, and the rotating block (72) abuts against the first folding rod (21) through the abutting block.
5. A pedal-assisted wheel folding mechanism and two-wheeled cart according to claim 4, wherein: the abutting block is in a cylindrical shape, and the rotating block (72) abuts against the first folding rod (21) through the circumferential outer surface of the abutting block.
6. A pedal-assisted wheel folding mechanism and two-wheeled cart according to claim 1, wherein: the number of the first pedals (61) is two, and the two first pedals (61) are respectively arranged at the left side and the right side of the frame (1).
7. A pedal-assisted wheel folding mechanism and two-wheeled cart according to claim 1, wherein: the auxiliary wheel (11) is a universal wheel.
8. A two-wheeled cart, characterized by: comprising a frame (8) and an auxiliary wheel folding mechanism according to any one of claims 1 to 7, wherein one side of the frame (8) is provided with a carrying plate (81) and the other side is provided with two mounting seats, two of the mounting seats are respectively provided with a main wheel (82), and the auxiliary wheel folding mechanism is respectively hinged on the mounting seats and the frame (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321539275.3U CN220076413U (en) | 2023-06-16 | 2023-06-16 | Pedal type auxiliary wheel folding mechanism and two-wheel handcart |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321539275.3U CN220076413U (en) | 2023-06-16 | 2023-06-16 | Pedal type auxiliary wheel folding mechanism and two-wheel handcart |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220076413U true CN220076413U (en) | 2023-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321539275.3U Active CN220076413U (en) | 2023-06-16 | 2023-06-16 | Pedal type auxiliary wheel folding mechanism and two-wheel handcart |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220076413U (en) |
-
2023
- 2023-06-16 CN CN202321539275.3U patent/CN220076413U/en active Active
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| GR01 | Patent grant | ||
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