CN114272029A - Buckle with pre-tightening function for folding wheelchair - Google Patents
Buckle with pre-tightening function for folding wheelchair Download PDFInfo
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- CN114272029A CN114272029A CN202111546009.9A CN202111546009A CN114272029A CN 114272029 A CN114272029 A CN 114272029A CN 202111546009 A CN202111546009 A CN 202111546009A CN 114272029 A CN114272029 A CN 114272029A
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- buckle
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- sleeve
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- 125000006850 spacer group Chemical group 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 210000004247 hand Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
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Abstract
The invention discloses a buckle with a pre-tightening function for a folding wheelchair, which comprises: the upper buckle sleeve is fixedly sleeved in the middle of the outer side surface of an upper folding piece of the folding wheelchair; the buckle folding plate is rotatably arranged on the upper buckle sleeve through an upper buckle pin, and a pin shaft is rotatably arranged at the bottom of one end, far away from the upper buckle sleeve, of the buckle folding plate; the lower buckle sleeve is fixedly sleeved in the middle of the outer side face of a lower folding piece of the folding wheelchair, and a lower buckle pin is rotatably arranged at the top of the lower folding piece; the bottom end of the spacing column is fixedly connected to the lower buckling pin through a locking screw, and the top end of the spacing column is connected to the pin shaft; and the pull pin is arranged at the bolt hole of the lower buckle sleeve.
Description
Technical Field
The invention particularly relates to the technical field of folding wheelchairs, and particularly relates to a buckle with a pre-tightening function for a folding wheelchair.
Background
At present, products such as a plurality of wheelchairs, baby carriages and the like can be designed into a foldable type in order to be convenient for storage, transportation and carrying, a plurality of revolute pairs are often arranged in the whole folding mechanism, a certain gap exists in each revolute pair, and the accumulated gaps are easy to cause the phenomena of looseness, shaking and the like in the use process after the products are unfolded if the products are not provided with the pre-tightening mechanism after being unfolded, or the pre-tightening function is reduced or lost due to the abrasion of each kinematic pair in the long-time use and folding process of the non-adjustable pre-tightening mechanism.
Disclosure of Invention
Therefore, the present invention provides a buckle with a pre-tightening function for a foldable wheelchair to solve the problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a buckle with a pre-tightening function for a folding wheelchair is characterized by comprising:
the upper buckle sleeve is fixedly sleeved in the middle of the outer side surface of an upper folding piece of the folding wheelchair;
the buckle folding plate is rotatably arranged on the upper buckle sleeve through an upper buckle pin, and a pin shaft is rotatably arranged at the bottom of one end, far away from the upper buckle sleeve, of the buckle folding plate;
the lower buckle sleeve is fixedly sleeved in the middle of the outer side face of a lower folding piece of the folding wheelchair, and a lower buckle pin is rotatably arranged at the top of the lower folding piece;
the bottom end of the spacing column is fixedly connected to the lower buckling pin through a locking screw, and the top end of the spacing column is connected to the pin shaft;
the pull pin is arranged at the bolt hole of the lower buckle sleeve, and the buckle folding plate can be stably buckled on the lower buckle sleeve by the pull pin.
Further, as preferred, the left side wall at buckle folded sheet middle part has seted up the slot hole, the matching card is equipped with in the slot hole pull round pin axle that pulls round pin right part, and is located buckle cover sets up to the inclined plane section under the part of slot hole below.
Further, preferably, the upper surface and the lower surface of the tail part of the buckle folding plate are both provided with anti-skidding grooves.
Furthermore, as preferred, the left and right side walls of the front part of the buckle folding plate are respectively provided with a small hole and a large hole, the step section of the pin shaft is clamped in the small hole in a matching manner, and the right end of the pin shaft is arranged in the large hole in a matching manner.
Further, as preferred, the middle part of round pin axle is seted up threaded through-hole, just threaded through-hole female connection has the top of space post.
Further, as preferred, be provided with through-hole and blind hole on the left and right both sides inside wall at lower buckle cover top respectively, the left end that the adaptation was provided with down the buckle round pin in the through-hole, the right-hand member of buckle round pin down match set up in the blind hole.
Preferably, a stop pin is fixedly mounted on the top of the lower folding member.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1. in the device, the buckling mechanism has strong pretightening force, so that the overall rigidity of the folding wheelchair can be increased when the folding wheelchair is in an unfolded state, and the shaking is reduced.
2. The device has adjustable locking pretightening force, can adjust the locking pretightening force according to the actual situation after assembly, can ensure the pretightening force to be in a proper range, can reduce the precision requirement of folding related parts, and saves the cost.
3. The device has the function of loosening and is not easy to be separated after being fastened.
Drawings
FIG. 1 is a schematic perspective view of a buckle with a pre-tightening function for a foldable wheelchair;
FIG. 2 is a sectional view of a buckle with a pre-tightening function for a foldable wheelchair;
FIG. 3 is a first schematic diagram of a pretensioning principle of a buckle with a pretensioning function for a folding wheelchair;
FIG. 4 is a schematic diagram of a second pre-tightening principle of a buckle with a pre-tightening function for a folding wheelchair;
FIG. 5 is a first schematic diagram of a locking principle of a buckle with a pre-tightening function for a folding wheelchair;
FIG. 6 is a schematic diagram of a second anti-loosening principle of a buckle with a pre-tightening function for a folding wheelchair;
FIG. 7 is a partial sectional view of a buckle with a pre-tightening function for a folding wheelchair;
FIG. 8 is a schematic view showing a state from the opening to the locking of a buckle having a pre-tightening function for a folding wheelchair;
FIG. 9 is a schematic view of an alternative embodiment of a center pull pin of a buckle with a pre-tightening function for a folding wheelchair;
FIG. 10 is a first schematic view of another application of a buckle with a pre-tightening function for a foldable wheelchair;
FIG. 11 is a second schematic view of another application of a buckle with a pre-tightening function for a foldable wheelchair;
fig. 12 is a third schematic view of another application of the buckle with the pre-tightening function for the folding wheelchair.
In the figure: 1. mounting a buckle sleeve; 2. an upper snap pin; 3. a buckle folding plate; 4. a pin shaft; 5. a spacer pillar; 6. a lower snap pin; 7. locking screws; 8. a lower buckle sleeve; 9. a lower folding member; 10. an upper folding member; 11. pulling a pin; 12. a rod A; 13. a rod B; 14. a rod C; 15. a rod D; 16. a slope section; 17. pulling the pin shaft; 18. a small hole; 19. macropores; 20. a stage of stage; 21. a through hole; 22. blind holes; 30. a stop pin; 31. glass beads; 32. a long hole; 50. feeding a pipe; 51. an upper plate; 52. a lower plate; 53. a spring plate; 54. a spring sheet sleeve; 55. a lower pipe; 56. a boss; 57. a second slope section; 58. a circular hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Example (b): referring to fig. 1-8, wherein E is the rotation center of the upper folding member 10 and the lower folding member 9, the present invention provides a technical solution: a buckle with a pre-tightening function for a folding wheelchair comprises:
the upper buckle sleeve 1 is fixedly sleeved on the middle part of the outer side surface of an upper folding piece 10 of the folding wheelchair;
the buckle folding plate 3 is rotatably arranged on the upper buckle sleeve 1 through an upper buckle pin 2, so that the upper buckle sleeve 1 and the buckle folding plate 3 can rotate around the upper buckle pin 2, and a pin shaft 4 is rotatably arranged at the bottom of one end, far away from the upper buckle sleeve 1, of the buckle folding plate 3;
the lower buckling sleeve 8 is fixedly sleeved in the middle of the outer side surface of a lower folding piece 9 of the folding wheelchair, and the top of the lower folding piece 9 is rotatably provided with a lower buckling pin 6;
the bottom end of the spacing column 5 is fixedly connected to the lower buckling pin 6 through a locking screw 7, so that the spacing column 5 and the lower buckling sleeve 8 can rotate around the lower buckling pin 6, and the top end of the spacing column 5 is connected to the pin shaft 4;
and the pull pin 11 is arranged at the bolt hole of the lower buckle sleeve 8, and the pull pin 11 can stably buckle the buckle folding plate 3 on the lower buckle sleeve 8.
In this embodiment, the middle part of the pin shaft 4 is provided with a threaded through hole, and the threaded through hole is internally threaded with the top end of the spacer 5.
Please refer to fig. 3 and 4, the device of the present invention adopts a four-bar mechanism principle, wherein the upper buckle sleeve 1 and the upper folding member 10 are arranged as a bar a12, the lower buckle sleeve 8 and the lower folding member 9 are arranged as a bar B13, the buckle folding plate 3 is arranged as a bar C14, and the spacer 5 is arranged as a bar D15; when the included angle between the rod C14 and the rod D15 is close to 0 degree, the clamping force between the rod A12 and the rod B13 is very large, so that the buckling mechanism has strong pretightening force;
meanwhile, when the upper folding piece 10 abuts against the stop pin 30 under the assembly of different parts, the clamping state of the rod A12 and the rod B13 also changes to have a certain position error range, and at the moment, the clamping force of the rod A12 and the rod B13 is ensured to be in a set range under the unfolding state of the whole vehicle (when the upper folding piece abuts against the stop pin) by adjusting the state of the rod C14; when the whole vehicle folding mechanism is loosened after being unfolded due to abrasion, the length of the increasing rod C14 can be adjusted to increase the pretightening force to ensure the stability of the whole vehicle in the unfolding state.
In the embodiment, a long hole 32 is formed in the left side wall of the middle of the buckle folding plate 3, a pull pin shaft 17 at the right part of the pull pin 11 is clamped in the long hole 32 in a matching manner, a part of the lower buckle sleeve 8 positioned below the long hole 32 is provided with an inclined plane section 16, the pull pin 11 is pulled outwards manually and drives the pull pin shaft 17 to move outwards, and the pull pin shaft 17 can reset automatically after the hand is released;
specifically, the device adopts a reverse anti-loosening principle, when the rod C14 and the rod D15 are overlapped, the buckle folding plate 3 is continuously folded downwards to be in a state shown in fig. 4, at the moment, the rod D15 reaches the other side of the rod C14, at the moment, if the whole vehicle is folded, an included angle between the rod 12A and the rod 13B needs to be increased, the rod 12A has a tendency of rotating around a rotating center E in an anticlockwise direction, the rod 13B has a tendency of rotating around the rotating center E in a clockwise direction, so that the rod 14C is driven to move upwards and downwards in a clockwise direction, and the rod 14C is driven to rotate around the rotating center F in a clockwise direction, so that the buckle folding plate 3 presses the buckle sleeve 8 more tightly, and the buckle folding plate 3 is ensured not to be opened as long as the buckle folding plate 3 is not influenced by external force, and the buckle mechanism has an anti-loosening function;
meanwhile, referring to fig. 5 and 6, the device of the invention adopts the pull pin 11 to realize double-loose-proof safety, when the buckle folding plate 3 is about to reach the folding position, the inclined surface section 16 of the buckle folding plate 3 contacts with the pull pin shaft 17 and pushes the pull pin shaft 17 to move leftwards, when the pull pin shaft 17 reaches the long hole 32 position of the folding plate, the pull pin shaft 17 automatically rebounds and resets, and the pull pin shaft 17 can extend into the long hole 32 of the buckle folding plate 3, at this moment, the state is as shown in fig. 6, the pull pin 11 plays a safety role, and the safety structure is very reliable; when the folding mechanism needs to be opened, the pulling pin 11 is pulled outwards by hands to break the buckle folding plate 3 upwards;
furthermore, referring to fig. 9, the pull pin 11 of the device of the present invention may also adopt other alternative fastening components, for example, two symmetrically arranged beads 31 may be adopted, and the fastening effect of the beads 31 and the pull pin is the same.
In this embodiment, all be provided with anti-skidding groove on the upper and lower two surfaces of 3 afterbody of buckle folded sheet, increase the contact frictional force when buckle folded sheet 3 is pressed and breaks off with the fingers and thumb, play anti-skidding effect.
In this embodiment, the left and right side walls of the front portion of the buckle folding plate 3 are respectively provided with a small hole 18 and a large hole 19, the step section 20 of the pin shaft 4 is clamped in the small hole 18 in a matching manner, and the right end of the pin shaft 4 is arranged in the large hole 19 in a matching manner.
In this embodiment, the left and right inner side walls at the top of the lower buckle sleeve 8 are respectively provided with a through hole 21 and a blind hole 22, the left end of the lower buckle pin 6 is arranged in the through hole 21 in a matching manner, and the right end of the lower buckle pin 6 is arranged in the blind hole 22 in a matching manner.
Specifically, the pin shaft 4 can only move rightwards after being installed in place from the right side; after the lower snap pin 6 is put in place from the left side, it can only move to the left; after connecting round pin axle 4 and lower buckle round pin 6 with spacer 5, the three can neither move left nor move right, can guarantee like this that round pin axle 4 and lower buckle round pin 6 can not fall out, also can guarantee this folding mechanism opening the in-process, and spacer 5, round pin axle 4 and lower buckle round pin 6 can not left and right move.
In this embodiment, a stop pin 30 is fixedly mounted on the top of the lower folding member 9, so that the upper folding member 10 and the lower folding member 9 can be rotated to the unfolding angle and then stopped.
Furthermore, the fastening mechanism in the device of the present invention can also be applied to the folding field such as a folding backrest of a wheelchair, etc. which needs to be folded and is pre-tightened without shaking after being unfolded, please refer to fig. 10-12, the present invention provides another embodiment, which mainly comprises an upper tube 50, an upper plate 51, a lower plate 52, a spring 53, a spring cover 54 and a lower tube 55, wherein the fastening mechanism of the device of the present invention is installed between the upper plate 51 and the lower plate 52, the upper plate 51 is fixed on the upper tube 50, the lower plate 52 is fixed on the lower tube 55, the spring 53 is fixed on the lower tube 55, and the upper plate 51 and the lower plate 52 rotate around a rotation axis to complete the folding; and, when the buckle mechanism is about to be locked, the boss 56 of the pin shaft contacts with the second inclined surface section 57 of the elastic sheet 53, and pushes away the elastic sheet 53 until the buckle mechanism is completely locked, and the boss 56 just enters the round hole 58 of the elastic sheet 53 at this time, so that the elastic sheet 53 can buckle the pin shaft to ensure that the buckle is not loosened under the condition that the elastic sheet 53 is not broken.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A buckle with a pre-tightening function for a folding wheelchair is characterized by comprising:
the upper buckle sleeve (1) is fixedly sleeved in the middle of the outer side surface of an upper folding piece (10) of the folding wheelchair;
the buckle folding plate (3) is rotatably arranged on the upper buckle sleeve (1) through an upper buckle pin (2), and a pin shaft (4) is rotatably arranged at the bottom of one end, far away from the upper buckle sleeve (1), of the buckle folding plate (3);
the lower buckling sleeve (8) is fixedly sleeved in the middle of the outer side face of a lower folding piece (9) of the folding wheelchair, and a lower buckling pin (6) is rotatably arranged at the top of the lower folding piece (9);
the bottom end of the spacing column (5) is fixedly connected to the lower buckling pin (6) through a locking screw (7), and the top end of the spacing column (5) is connected to the pin shaft (4);
and the pull pin (11), the pull pin (11) is arranged at the bolt hole of the lower buckle sleeve (8), and the pull pin (11) can stably buckle the buckle folding plate (3) on the lower buckle sleeve (8).
2. The buckle with pre-tightening function for the folding wheelchair as claimed in claim 1, wherein: slotted hole (32) have been seted up on the left side wall at buckle folded sheet (3) middle part, the matching card is equipped with in slotted hole (32) pull round pin axle (17) of pulling round pin (11) right part, and is located buckle cover (8) set up to inclined plane section (16) under the part of slotted hole (32) below.
3. The buckle with pre-tightening function for the folding wheelchair as claimed in claim 2, wherein: and anti-skid grooves are formed in the upper surface and the lower surface of the tail part of the buckle folding plate (3).
4. The buckle with pre-tightening function for the folding wheelchair as claimed in claim 3, wherein: small holes (18) and large holes (19) are respectively formed in the left side wall and the right side wall of the front portion of the buckle folding plate (3), the small holes (18) are matched and clamped with the platform stages (20) of the pin shafts (4), and the right ends of the pin shafts (4) are matched and arranged in the large holes (19).
5. The buckle with pre-tightening function for the folding wheelchair as claimed in claim 4, wherein: the middle part of the pin shaft (4) is provided with a threaded through hole, and the threaded through hole is connected with the top end of the spacing column (5) in an internal thread mode.
6. The buckle with pre-tightening function for the folding wheelchair as claimed in claim 4, wherein: the left inner side wall and the right inner side wall of the top of the lower buckle sleeve (8) are respectively provided with a through hole (21) and a blind hole (22), the left end of the lower buckle pin (6) is arranged in the through hole (21) in a matched mode, and the right end of the lower buckle pin (6) is arranged in the blind hole (22) in a matched mode.
7. The buckle with pre-tightening function for the folding wheelchair as claimed in claim 1, wherein: and a stop pin (30) is fixedly arranged at the top of the lower folding piece (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546009.9A CN114272029B (en) | 2021-12-16 | 2021-12-16 | Buckle with pretension function for folding wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546009.9A CN114272029B (en) | 2021-12-16 | 2021-12-16 | Buckle with pretension function for folding wheelchair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114272029A true CN114272029A (en) | 2022-04-05 |
| CN114272029B CN114272029B (en) | 2024-03-12 |
Family
ID=80872664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111546009.9A Active CN114272029B (en) | 2021-12-16 | 2021-12-16 | Buckle with pretension function for folding wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114272029B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070222263A1 (en) * | 2006-03-25 | 2007-09-27 | Dominik Szczudrawa | Vehicle seat |
| CN207403858U (en) * | 2017-08-30 | 2018-05-25 | 国星智能（深圳）科技有限公司 | A kind of fold mechanism of electric car |
| CN209091916U (en) * | 2018-04-27 | 2019-07-12 | 广州视源电子科技股份有限公司 | Wheelchair and stability augmentation mechanism thereof |
| CN209152810U (en) * | 2018-11-01 | 2019-07-26 | 四川瑞朗医疗器械有限公司 | A kind of Foldable lift guardrail |
| CN209770717U (en) * | 2018-06-14 | 2019-12-13 | 薛永来 | Quick-assembly-disassembly folding mini vehicle head for hand-push wheelchair |
| CN210185875U (en) * | 2018-05-22 | 2020-03-27 | 中山市福佑医疗器材有限公司 | Left-right folding structure of wheelchair |
| CN111874148A (en) * | 2020-08-21 | 2020-11-03 | 北京小米移动软件有限公司 | Folding structure, folding equipment and folding car |
-
2021
- 2021-12-16 CN CN202111546009.9A patent/CN114272029B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070222263A1 (en) * | 2006-03-25 | 2007-09-27 | Dominik Szczudrawa | Vehicle seat |
| CN207403858U (en) * | 2017-08-30 | 2018-05-25 | 国星智能（深圳）科技有限公司 | A kind of fold mechanism of electric car |
| CN209091916U (en) * | 2018-04-27 | 2019-07-12 | 广州视源电子科技股份有限公司 | Wheelchair and stability augmentation mechanism thereof |
| CN210185875U (en) * | 2018-05-22 | 2020-03-27 | 中山市福佑医疗器材有限公司 | Left-right folding structure of wheelchair |
| CN209770717U (en) * | 2018-06-14 | 2019-12-13 | 薛永来 | Quick-assembly-disassembly folding mini vehicle head for hand-push wheelchair |
| CN209152810U (en) * | 2018-11-01 | 2019-07-26 | 四川瑞朗医疗器械有限公司 | A kind of Foldable lift guardrail |
| CN111874148A (en) * | 2020-08-21 | 2020-11-03 | 北京小米移动软件有限公司 | Folding structure, folding equipment and folding car |
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| Publication number | Publication date |
|---|---|
| CN114272029B (en) | 2024-03-12 |
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