CN109552388B - Mobile device - Google Patents
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- CN109552388B CN109552388B CN201811604166.9A CN201811604166A CN109552388B CN 109552388 B CN109552388 B CN 109552388B CN 201811604166 A CN201811604166 A CN 201811604166A CN 109552388 B CN109552388 B CN 109552388B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
- B62B5/0438—Braking mechanisms; Locking devices against movement hand operated
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Abstract
The invention discloses a moving device, and belongs to the technical field of transportation equipment. The moving device comprises a brake mechanism and a driving assembly, wherein the brake mechanism comprises a first wheel set, a second wheel set, an elastic part, a main string, an auxiliary string and a brake assembly, the first wheel set and the second wheel set are oppositely arranged, and the brake assembly directly brakes a wheel; one end of the elastic element is connected with the first wheel set, and the other end of the elastic element is connected with the second wheel set; when the main string is pulled, the distance between the first wheel set and the second wheel set is gradually reduced, and the maximum distance between the first auxiliary string and the auxiliary wheel rotation center of the first auxiliary wheel and the maximum distance between the second auxiliary string and the auxiliary wheel rotation center of the second auxiliary wheel are both gradually reduced. The elastic piece, the large main wheel and the small main wheel are connected through the main strings and the auxiliary strings and are combined with the brake assembly to form the brake mechanism, and the brake mechanism is more labor-saving when braking is released compared with the traditional brake mechanism.
Description
Technical Field
The invention relates to the technical field of transportation equipment, in particular to a mobile device.
Background
The trolley plays an important role as an auxiliary device in airports, and is mainly used for carrying luggage of passengers. Based on the practical application scene needs of the airport, the airport trolley is convenient to control when needing to be used and is firm, durable, light and flexible.
In the prior art, the effectiveness of a brake mechanism of the airport trolley needs to be solved, so that the airport trolley can be automatically locked in an unmanned control state, and the phenomenon that the trolley slides by means of inertia acting force and further collides with other people is prevented from occurring under the condition that the control of the trolley is lost. Meanwhile, due to the existence of the brake mechanism, when a user needs to use the trolley, force must be continuously applied to the trolley so as to release the braking force of the brake mechanism on the wheels of the trolley, the applied force must be always greater than the braking force which can be released by the brake mechanism on the wheels of the trolley, and passengers tired in journey still need to apply larger force to drive the trolley, so that the user experience is poor.
Therefore, it is desirable to provide a mobile device to solve the above problems.
Disclosure of Invention
The invention aims to provide a mobile device, which can release braking force of a brake by providing small force and avoid causing fatigue of a user.
In order to achieve the purpose, the invention adopts the following technical scheme:
a mobile device comprising a brake mechanism and a drive assembly for releasing braking of the brake mechanism, the brake mechanism comprising:
the wheel set comprises a first wheel set and a second wheel set which are arranged oppositely, each wheel set comprises a main wheel and an auxiliary wheel arranged on the main wheel, and the outer diameter of the main wheel is larger than that of the auxiliary wheel;
one end of the elastic element is connected with the first wheel set, and the other end of the elastic element is connected with the second wheel set;
one end of the main string is connected with a first main wheel in the first wheel set, the other end of the main string is connected with a second main wheel in the second wheel set, and the main string can be pulled by the driving assembly;
the auxiliary string comprises a first auxiliary string and a second auxiliary string, one end of the first auxiliary string is connected with the first main wheel, the other end of the first auxiliary string is connected with one end of the elastic part, and when the first auxiliary wheel in the first wheel set rotates, the first auxiliary string can be wound on the first auxiliary wheel; one end of the second auxiliary string is connected with the second main wheel, the other end of the second auxiliary string is connected with the other end of the elastic piece, and when the second auxiliary wheel in the second wheel set rotates, the second auxiliary string can be wound on the second auxiliary wheel;
one end of the brake assembly can be abutted against the wheel, the other end of the brake assembly is connected with the main string, the brake assembly is further connected with the driving assembly, and the driving assembly can enable the brake assembly to pull the main string to brake the wheel;
wherein the distance between the first wheel set and the second wheel set gradually decreases when the main string is pulled.
Preferably, the secondary wheel is an eccentric wheel, and when the main string is pulled, the maximum distance between the first secondary string and the secondary wheel rotation center of the first secondary wheel and the maximum distance between the second secondary string and the secondary wheel rotation center of the second secondary wheel (22) are gradually reduced.
Preferably, the auxiliary wheel comprises an arc section and a straight line section, and the vertical distance between the straight line section and the rotation center of the auxiliary wheel is smaller than the distance between the arc section and the rotation center of the auxiliary wheel.
Preferably, the first main wheel and the second main wheel are eccentric wheels, and when the main string is pulled, the maximum distance between the main string and the rotation center of the main wheel of the first main wheel and the maximum distance between the main string and the rotation center of the main wheel of the second main wheel are gradually increased.
Preferably, a fixing ring is arranged on the moving device; the brake assembly comprises a brake rod, one end of the brake rod can brake the wheel, and the other end of the brake rod penetrates through the fixing ring to be connected with the main string. Preferably, the driving assembly comprises a pressing rod and a driving string connected with the main string, the pressing rod is provided with a rotating fulcrum, one end of the pressing rod is connected with the driving string, and the other end of the pressing rod is used for applying driving force;
the distance between the position of the pressure lever connected with the driving string and the rotating fulcrum is smaller than the distance between the position of the pressure lever used for applying the driving force and the rotating fulcrum.
Preferably, the side walls of the first main wheel and the second main wheel are provided with main string hanging head grooves, and main string hanging heads are arranged in the main string hanging head grooves.
Preferably, the main string hanging head on the first main wheel is arranged on one side of the first main wheel far away from the first auxiliary wheel; and the main string hanging head on the second main wheel is arranged on one side of the second main wheel far away from the second auxiliary wheel.
Preferably, the main wheel and the auxiliary wheel in each wheel set are provided with lightening holes.
Preferably, the mobile device is an airport trolley.
The invention has the beneficial effects that:
the elastic piece, the large main wheel and the small main wheel are connected through the main strings and the auxiliary strings and are combined with the brake assembly to form the brake mechanism, and the brake mechanism is more labor-saving when the brake is released compared with the traditional brake mechanism.
Drawings
FIG. 1 is a schematic structural diagram of a mobile device in a braking state according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the mobile device in a brake-released state according to an embodiment of the present invention;
FIG. 3 is a schematic view of a main wheel according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a sub-wheel in the embodiment of the present invention.
In the figure:
100. a mobile device body 100;
1. a first wheel set; 11. a first main wheel; 12. a first auxiliary wheel; 121. a circular arc section; 122. a straight line segment;
2. a second wheel set; 21. a second main wheel; 22. a second auxiliary wheel;
3. a major chord;
4. a secondary chord; 41. a first secondary chord; 42. a second minor chord;
5. an elastic member; 6. a brake lever; 7. a wheel; 8. a fixing ring;
9. a drive assembly; 91. a drive string; 92. a pressure lever; 93. rotating a fulcrum;
10. a main wheel rotation center; 20. lightening holes; 30. reinforcing ribs; 40. a main string hanging head; 50. the auxiliary wheel rotates the center.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 and 2, the present embodiment discloses a moving device including a brake mechanism and a driving assembly 9 for releasing braking of the brake mechanism. The moving device in the embodiment mainly refers to the airport trolley, and the braking mechanism and the driving assembly 9 are provided, so that when the wheels 7 are braked by the braking mechanism of the airport trolley, a user does not need to always keep larger than the braking force of the braking mechanism to the airport trolley. Of course, other transportation devices may be used.
Specifically, the brake mechanism in the moving device comprises a wheel set, an elastic part 5, a main string 3, an auxiliary string 4 and a brake component for directly braking a wheel 7; the wheel sets comprise a first wheel set 1 and a second wheel set 2 which are arranged oppositely, each wheel set comprises a main wheel and an auxiliary wheel arranged on the main wheel, and the outer diameter of the main wheel is larger than that of the auxiliary wheel; one end of the elastic element 5 is connected with the first wheel set 1, and the other end of the elastic element 5 is connected with the second wheel set 2; one end of the main string 3 is connected with a first main wheel 11 in the first wheel set 1, and the other end of the main string 3 is connected with a second main wheel 21 in the second wheel set 2; the auxiliary string 4 comprises a first auxiliary string 41 and a second auxiliary string 42, one end of the first auxiliary string 41 is connected with the first main wheel 11, the other end of the first auxiliary string is connected with one end of the elastic piece 5, and the first auxiliary string 41 can be wound on the first auxiliary wheel 12 when the first auxiliary wheel 12 rotates; one end of the second auxiliary string 42 is connected with the second main wheel 21, the other end is connected with the other end of the elastic piece 5, and when the second auxiliary wheel 22 rotates, the second auxiliary string 42 can be wound on the second auxiliary wheel 22; one end of the brake assembly can be abutted against the wheel 7, the other end of the brake assembly is connected with the main string 3, the brake assembly is further connected with a driving assembly 9, and the driving assembly 9 can enable the brake assembly to pull the main string 3 to brake the wheel 7; wherein, when the main string 3 is pulled, the elastic element 5 deforms, and the distance between the first wheel set 1 and the second wheel set 2 is gradually reduced.
The elastic element 5, the wheel set, the main string 3 and the auxiliary string 4 in the brake mechanism act together, and the brake mechanism is equivalent to a reset elastic element arranged on a brake assembly in a traditional brake mechanism. When the airport trolley is in a static state, the elastic piece 5, the wheel set, the main string 3 and the auxiliary string 4 are in an initial state, and a brake component connected with the main string 3 is abutted against the wheel 7. When the brake assembly is released from braking the wheel 7, the main string 3 is pulled to separate the brake assembly from the wheel 7, and the elastic member 5 is deformed. If no wheel set is arranged, the elastic part 5 deforms and needs to apply a first main force F to the main string 3; when the wheel set is arranged, the elastic part 5 is directly connected with the auxiliary wheel in the wheel set, the deformation of the elastic part 5 requires that the auxiliary force M applied to the elastic part 5 by the auxiliary string 4 is equal to the first main force F, and according to the moment conservation law, the product of the auxiliary force M applied by the auxiliary string 4 and the distance L between the auxiliary string 4 and the rotation center 50 of the auxiliary wheel is equal to the product of the main force N applied by the main string 3 and the distance S between the main string 3 and the rotation center 10 of the main wheel. Wherein L is smaller than S, the secondary force M is equal to the first main force F, and the main force N that the main string 3 needs to exert is necessarily smaller than the first main force F. Therefore, the elastic member 5, and the large and small main and sub wheels are connected by the main strings 3 and the sub strings 4 and combined with the brake assembly, not only can form a brake mechanism, but also the brake mechanism is more labor-saving when the brake is released compared with the conventional brake mechanism. Theoretically, the larger the difference between the outer diameters of the main wheel and the auxiliary wheel is, the more labor is saved when the brake is released.
Specifically, as shown in fig. 3 and 4, the side walls of the first main wheel 11 and the second main wheel 21 are each provided with a main string hitch groove in which a main string hitch 40 is disposed. One end of the main string 3 is connected to the main string hitch 40 on the first main wheel 11, and the other end is connected to the main string hitch 40 on the second main wheel 21. Preferably, the main hitch 40 on the first main wheel 11 is arranged on the side of the first main wheel 11 remote from the first auxiliary wheel 12; the main hitch 40 on the second main wheel 21 is arranged on the side of the second main wheel 21 remote from the second auxiliary wheel 22. Thus, the interference of the main string 3 and the auxiliary string 4 when the wheel set rotates can be avoided. And, the side of the first main wheel 11 where the first sub-wheel 12 is provided, and the side of the second main wheel 21 where the second sub-wheel 22 is provided are provided with sub-hitch.
In addition, in order to ensure that the first auxiliary string 41 can be smoothly wound on the first auxiliary wheel 12 and the second auxiliary string 42 can be smoothly wound on the second auxiliary wheel 22, the first auxiliary string 41 is disposed at an angle with respect to the straight lines of the first wheel set 1 and the second wheel set 2, and the second auxiliary string 42 is disposed at an angle with respect to the straight lines of the first wheel set 1 and the second wheel set 2, so that the first auxiliary string 41 and the second auxiliary string 42 are arranged in an X-shaped crossing manner.
In addition, the elastic element 5 may be an integral structure, one end of the elastic element 5 is connected to the first wheel set 1, the other end is connected to the second wheel set 2, and the middle portion of the elastic element 5 is fixedly disposed on the frame of the mobile device. When the main string 3 is pulled, the elastic member 5 is elastically deformed, and the first wheel set 1 and the second wheel set approach each other. In another embodiment, there are two elastic members 5, wherein one end of one elastic member 5 is connected to the first wheel set 1, and the other end is fixedly connected to the mobile device body 100; one end of the other elastic element 5 is connected to the second wheel set 2, and the other end is also fixedly connected to the mobile device body 100. When the main string 3 is pulled, the first wheel set 1 and the second wheel set 2 approach each other, and correspondingly, the ends of the two elastic members 5 connected to the wheel sets approach each other and remain stationary with the end of the mobile device frame that remains stationary.
Further, the secondary wheel is an eccentric wheel, and when the main string 3 is pulled, the maximum distance between the first secondary string 41 and the secondary wheel rotation center 50 of the first secondary wheel 12 and the maximum distance between the second secondary string 42 and the secondary wheel rotation center 50 of the second secondary wheel 22 are gradually reduced. From the above conservation of moment, when L is continuously decreased, the auxiliary force M is equal to the first main force F, and the main force N required to be applied by the main string 3 is necessarily further decreased, so that the force required to release the braking is smaller.
Further, the secondary wheel comprises a circular arc section 121 and a straight line section 122, and the perpendicular distance between the straight line section 122 and the secondary wheel rotation center 50 is smaller than the distance between the circular arc section 121 and the secondary wheel rotation center 50. By the arrangement, after the auxiliary wheel rotates for a certain angle, the distance between the auxiliary string 4 and the auxiliary wheel rotation center 50 is minimum, so that the main force applied to the main string 3 is minimum, and the fatigue of a user caused by long-term application of variable force or the same large force is avoided.
Further, the first main wheel 11 and the second main wheel 21 are eccentric wheels, and when the main string 3 is pulled, the maximum distance between the main string 3 and the main wheel rotation center 10 of the first main wheel 11 and the maximum distance between the main string 3 and the main wheel rotation center 10 of the second main wheel 21 are gradually increased. With this arrangement, the main force exerted on the main string 3 can be further reduced, and the power saving effect can be further achieved.
Further, a fixing ring 8 is arranged on the moving device; the brake assembly comprises a brake rod 6, one end of the brake rod 6 can brake a wheel 7, and the other end of the brake rod 6 penetrates through a fixing ring 8 to be connected with the main string 3. This ensures that the brake lever 6 can be raised or lowered in a predetermined direction to apply the brake to the wheel 7 in abutment or release the brake from the wheel 7. Of course, the fixing ring 8 can be provided as a fixing groove, which extends a distance in the length direction of the brake lever 6 for guiding.
In this embodiment, the driving assembly 9 includes a driving string 91, and one end of the driving string 91 is connected to the brake lever 6 and can drive the brake lever 6 to pull the main string 3. Wherein the driving string 91 may be a pull string. In other embodiments, the driving string 91 may be replaced by other structures such as a driving rod.
Further, the driving assembly 9 further includes a pressing rod 92, a rotation fulcrum 93 is disposed on the pressing rod 92, the rotation fulcrum 93 is disposed on the moving device body 100, one end of the pressing rod 92 is connected with the driving string 91, and the other end is used for applying a driving force; wherein, the distance between the driving line and the rotating fulcrum 93 is smaller than the distance between the position of the pressing rod 92 for applying the driving force and the rotating fulcrum 93. Thus, the driving force applied by the user to the end of the pressing lever 92 can be further reduced by using the principle of leverage.
In addition, referring again to fig. 3 and 4, the main and sub-wheels of each wheel set are provided with lightening holes 20 to lighten the weight of the moving device. Preferably, the main wheel and the auxiliary wheel of each wheel set can be provided with the reinforcing ribs 20, and under the condition that the weight of the wheel sets is reduced as much as possible, the main wheel and the auxiliary wheel in the wheel sets can meet the use requirements through reasonable arrangement of the reinforcing ribs 20.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A mobile device comprises a brake mechanism and a driving component (9) used for releasing the brake of the brake mechanism, wherein the brake mechanism comprises wheel sets, an elastic component (5) and a brake component, and is characterized in that the wheel sets comprise a first wheel set (1) and a second wheel set (2) which are oppositely arranged, each wheel set comprises a main wheel and an auxiliary wheel arranged on the main wheel, and the outer diameter of the main wheel is larger than that of the auxiliary wheel;
one end of the elastic piece (5) is connected with the first wheel set (1), and the other end of the elastic piece is connected with the second wheel set (2);
the brake mechanism further comprises a main string (3) and an auxiliary string (4), one end of the main string (3) is connected with a first main wheel (11) in the first wheel set (1), the other end of the main string is connected with a second main wheel (21) in the second wheel set (2), and the main string (3) can be pulled by the driving component (9); the auxiliary string (4) comprises a first auxiliary string (41) and a second auxiliary string (42), one end of the first auxiliary string (41) is connected with the first main wheel (11), the other end of the first auxiliary string is connected with one end of the elastic part (5), and when the first auxiliary wheel (12) in the first wheel set (1) rotates, the first auxiliary string (41) can be wound on the first auxiliary wheel (12); one end of the second auxiliary string (42) is connected with the second main wheel (21), the other end of the second auxiliary string is connected with the other end of the elastic part (5), and when a second auxiliary wheel (22) in the second wheel set (2) rotates, the second auxiliary string (42) can be wound on the second auxiliary wheel (22);
one end of the brake assembly can be abutted against a wheel (7), the other end of the brake assembly is connected with the main string (3), the brake assembly is further connected with the driving assembly (9), and the driving assembly (9) can enable the brake assembly to pull the main string (3) to release the brake on the wheel (7);
wherein the distance between the first wheel set (1) and the second wheel set (2) is gradually reduced when the main chord (3) is pulled.
2. The movement apparatus according to claim 1, wherein the secondary wheel is an eccentric wheel, and when the main string (3) is pulled, the maximum distance between the first secondary string (41) and the secondary wheel rotation center (50) of the first secondary wheel (12) and the maximum distance between the second secondary string (42) and the secondary wheel rotation center (50) of the second secondary wheel (22) are gradually reduced.
3. The moving device according to claim 2, characterized in that the secondary wheel comprises a circular arc section (121) and a straight section (122), the straight section (122) being at a smaller perpendicular distance from the secondary wheel centre of rotation (50) than the circular arc section (121) is from the secondary wheel centre of rotation (50).
4. The moving device according to claim 1, characterized in that said first main wheel (11) and said second main wheel (21) are eccentric wheels, the maximum distance of said main chord (3) from the main wheel rotation centre (10) of said first main wheel (11) and the maximum distance of said main chord (3) from the main wheel rotation centre (10) of said second main wheel (21) increasing progressively when said main chord (3) is pulled.
5. Mobile device according to any of claims 1-4, characterized in that a fixed ring (8) is provided on the mobile device; the brake assembly comprises a brake rod (6), one end of the brake rod (6) can brake the wheel (7), and the other end of the brake rod penetrates through the fixing ring (8) to be connected with the main string (3).
6. The moving device according to claim 5, wherein the driving assembly (9) comprises a pressing rod (92) and a driving string (91) connected with the main string (3), the pressing rod (92) is provided with a rotating fulcrum (93), one end of the pressing rod (92) is connected with the driving string (91), and the other end is used for applying a driving force;
wherein the distance between the position of the pressure lever (92) connecting the driving string (91) and the rotating fulcrum (93) is smaller than the distance between the position of the pressure lever (92) for applying the driving force and the rotating fulcrum (93).
7. The moving device according to claim 1, characterized in that the side walls of the first main wheel (11) and the second main wheel (21) are each provided with a main string hitch groove in which a main string hitch (40) is arranged.
8. The displacement device according to claim 7, characterized in that a main hitch (40) on the first main wheel (11) is arranged on the side of the first main wheel (11) remote from the first auxiliary wheel (12); the main string hanging head (40) on the second main wheel (21) is arranged on one side, away from the second auxiliary wheel (22), of the second main wheel (21).
9. The mobile device according to claim 1, characterized in that the primary and secondary wheels of each wheel set are provided with lightening holes (20).
10. The mobile device of claim 1, wherein the mobile device is an airport trolley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604166.9A CN109552388B (en) | 2018-12-26 | 2018-12-26 | Mobile device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604166.9A CN109552388B (en) | 2018-12-26 | 2018-12-26 | Mobile device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109552388A CN109552388A (en) | 2019-04-02 |
| CN109552388B true CN109552388B (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811604166.9A Active CN109552388B (en) | 2018-12-26 | 2018-12-26 | Mobile device |
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| Country | Link |
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| CN (1) | CN109552388B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999019198A1 (en) * | 1997-10-15 | 1999-04-22 | Igc (Australia) Pty. Ltd. | Steerable load-carrying assemblies |
| JP2005014894A (en) * | 2003-06-06 | 2005-01-20 | Aprica Kassai Inc | Wheel simultaneous braking mechanism, caster rotation prevention mechanism, and baby carriage |
| CN201932215U (en) * | 2011-01-19 | 2011-08-17 | 袁伯权 | Brake device of baby carrier |
| CN108313108B (en) * | 2018-03-14 | 2024-01-19 | 上海托华机器人有限公司 | Material car that AGV pulls |
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2018
- 2018-12-26 CN CN201811604166.9A patent/CN109552388B/en active Active
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