CN108422805B - Caster wheel - Google Patents
Caster wheel Download PDFInfo
- Publication number
- CN108422805B CN108422805B CN201810289250.XA CN201810289250A CN108422805B CN 108422805 B CN108422805 B CN 108422805B CN 201810289250 A CN201810289250 A CN 201810289250A CN 108422805 B CN108422805 B CN 108422805B
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- China
- Prior art keywords
- limiting
- ejector rod
- caster
- retainer
- wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0028—Construction of wheels; methods of assembling on axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0078—Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Handcart (AREA)
Abstract
The invention discloses a caster which comprises a bracket and wheels, wherein the wheels are rotatably connected to two sides of the bracket. The bracket comprises a sleeve with a central shaft in the horizontal direction; the wheel comprises a wheel body, a retainer and a plurality of rolling bodies; the wheel body and the retainer are of hollow annular structures; the retainer is provided with rolling body fixing rings in an array along the circumferential direction, and a plurality of rolling bodies can be connected in the fixing rings in a rolling manner; the wheel body is sleeved on the outer surface of the retainer, and the retainer is respectively sleeved on two sides of the outer surface of the sleeve; and a plurality of rolling bodies are respectively in contact connection with the wheel body and the retainer. According to the caster, the wheels are installed and fixed without wheel shafts, the structure is novel, and the stability is good; when the common caster is used for casting the bracket, an extremely complex mold is needed, the bracket disclosed by the invention is simple in structure, and the design cost of the mold is greatly reduced.
Description
Technical Field
The invention belongs to the field of machinery, relates to a caster, and particularly relates to a caster free of wheel axle installation.
Background
The caster is a general term and comprises a movable caster and a fixed caster. The movable caster wheel is also called a universal wheel, and the structure of the movable caster wheel allows 360-degree rotation; the fixed caster is also called a directional caster, and has no rotating structure and can not rotate. Conventional casters typically secure the wheels to the frame via an axle. The caster wheel bracket has a complex structure and more parts, and causes great obstruction to mold design and caster wheel assembly. Therefore, a need exists for a new caster structure.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the caster, so that the number of parts is reduced, the assembly efficiency is improved, and the rotation stability of the foot is improved.
The technical scheme is as follows: in order to achieve the above object, the caster of the present invention comprises a frame and wheels rotatably connected to both sides of the frame; the bracket comprises a sleeve with a central shaft in the horizontal direction; the wheel comprises a wheel body, a retainer and a plurality of rolling bodies; the wheel body and the retainer are of hollow annular structures; the retainer is provided with rolling body fixing rings in an array along the circumferential direction, and a plurality of rolling bodies can be connected in the fixing rings in a rolling manner; the wheel body is sleeved on the outer surface of the retainer, and the retainer is respectively sleeved on two sides of the outer surface of the sleeve; and a plurality of rolling bodies are respectively in contact connection with the wheel body and the retainer.
Further, the bracket also comprises a horizontal ring and a vertical ring; the axes of the horizontal ring and the vertical ring are vertically arranged, and the horizontal ring and the vertical ring are connected through a rib plate; the sleeve is coaxially connected to the horizontal ring.
Further, the wheel body includes a tire and a support ring; the tire is wrapped on the outer cylindrical surface of the support ring; first rolling body mounting grooves are formed in two sides of the outer surface of the sleeve along the circumferential direction, second rolling body mounting grooves are formed in the inner cylindrical surface of the support ring along the circumferential direction, and the rolling bodies are in contact connection with the first rolling mounting grooves and the second rolling mounting grooves respectively.
Further, the device also comprises a shield; the shield covers the outer surface of the bracket.
Furthermore, the device also comprises a driving device, a braking device and a straight-moving control device; the driving device is coaxially connected to the vertical ring; the brake device is arranged below the driving device and is rotatably connected with the bracket; the straight-moving control device is arranged inside the vertical ring and is connected with the driving device.
Further, the driving device comprises a shell, a mandril, a limit pin and a cam; the ejector rod, the limiting pin and the cam are arranged in the shell; the ejector rod is coaxially connected with the vertical ring; the limiting pin is fixedly connected with the shell, and the cam is rotatably connected with the shell; the cam is respectively connected with the limiting pin and the ejector rod in a jacking mode.
Furthermore, the cam is provided with a first limiting surface, a second limiting surface and a third limiting surface; the first limiting surface, the second limiting surface and the third limiting surface are not on the same plane; the caster wheels move straight, and the ejector rod is connected with the first limiting surface in a jacking manner; the caster wheel swings in a universal way, and the ejector rod is connected with the second limiting surface in a jacking manner; and the trundle is locked, and the ejector rod is connected with the third limiting surface in a jacking and pressing manner.
Furthermore, the cam is provided with a limiting groove; the limiting pin is respectively contacted with two ends of the limiting groove to form a first limiting position and a second limiting position; the limiting pin is contacted with the first limiting position, and the ejector rod is connected with the first limiting surface in a jacking mode; the limiting pin is contacted with the second limiting position, and the ejector rod is connected with the third limiting surface in a jacking mode; the limiting pin is arranged between the first limiting position and the second limiting position, and the ejector rod is connected with the second limiting surface in a jacking mode.
Further, the straight-moving control device comprises a shaft, a control key and a round spring pad; the shaft is a hollow cavity and is coaxially sleeved and connected with the ejector rod; the circular elastic pad is of an annular structure and is sleeved on the outer cylindrical surface of the shaft;
the cylindrical surface of the ejector rod is provided with a first through groove, the cylindrical surface of the shaft is provided with a second through groove, the control key is fixed in the first through groove, two ends of the control key extend out, and the extending end of the control key slides up and down in the second through groove;
the round elastic cushion is provided with a one-way control groove along the direction of the straight movement of the caster, the control key is connected with the one-way control groove, and the caster moves straight.
Further, the brake device comprises a brake body; the brake body is arranged below the ejector rod and is rotatably connected with the bracket; the two sides of the brake body extend upwards to form brake plates, and sawtooth structures are arranged on the surfaces, corresponding to the wheels, of the brake plates.
Has the advantages that: the beneficial effects of the invention are as follows: (1) according to the caster, the wheels are hollow, compared with a common caster, the caster does not need to be installed and fixed by a wheel shaft, the structure is novel, and the complexity of the caster structure is greatly reduced; (2) the caster provided by the invention has the advantages that the support structure is simple, the complexity of a die used for casting the support is reduced, and the manufacturing cost of the caster is reduced; (3) according to the caster, the two wheels are directly connected with the bracket through the rolling bodies, so that the wheels can run more smoothly and stably.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the present invention after separation of the shield;
FIG. 3 is an exploded view of the frame and wheel of the present invention;
FIG. 4 is an exploded view of portion A of FIG. 3 in accordance with the present invention;
FIG. 5 is an exploded view of portion B of FIG. 4 in accordance with the present invention;
FIG. 6 is a front view of the cam of the present invention;
fig. 7 is a cross-sectional view of a front view of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
A castor as claimed in figures 1 to 7 comprising a frame 1 and wheels 2, the wheels 2 being rotatably connected to the frame 1 on either side thereof. Compared with the common caster wheel, the wheel 2 has no structure for mounting with the wheel shaft, is hollow and annular, has simple structure and reduces the manufacturing cost of the wheel 2.
The bracket 1 comprises a sleeve 3 with a central shaft in the horizontal direction;
the wheel 2 comprises a wheel body 5, a retainer 7 and a plurality of rolling bodies 8; the wheel body 5 and the retainer 7 are of hollow annular structures; the retainer 7 is provided with rolling body fixing rings 33 in an array along the circumferential direction, and a plurality of rolling bodies 8 can be connected in the fixing rings 33 in a rolling manner; the wheel body 5 is sleeved on the outer surface of the retainer 7, and the retainer 7 is respectively sleeved on two sides of the outer surface of the sleeve 3; a plurality of rolling bodies 8 are respectively connected with the wheel body 5 and the retainer 7 in a contact manner. When the caster disclosed by the invention rolls, the rolling bodies 8 roll between the wheel body 5 and the sleeve 3, so that the wheel body 5 and the sleeve 3 rotate relatively.
The support 1 further comprises a horizontal ring 34 and a vertical ring 35; the axes of the horizontal ring 34 and the vertical ring 35 are vertically arranged, and the horizontal ring 34 and the vertical ring 35 are connected through a rib plate 36; the sleeve 3 is coaxially connected to a horizontal ring 34. Compared with the common caster bracket, the bracket needs to have a structure for mounting the wheel shaft, which inevitably causes the complication of a mold used for casting the bracket. The caster wheel 2 is not connected with the support through a wheel shaft and is directly sleeved on the outer cylindrical surface of the sleeve 3, so that the structural complexity of the support 1 is reduced, and the complexity of a used die is also reduced.
The wheel body 5 comprises a tyre 9 and a support ring 6; the tire 9 is coated on the outer cylindrical surface of the support ring 6; first rolling body mounting grooves 4 are formed in two sides of the outer surface of the sleeve 3 in the circumferential direction, second rolling body mounting grooves 10 are formed in the inner cylindrical surface of the support ring 6 in the circumferential direction, and the rolling bodies 8 are in contact connection with the first rolling body mounting grooves 4 and the second rolling body mounting grooves 10 respectively.
Further comprises a shield 11; the shield 11 covers the outer surface of the bracket 1. The shield 11 can prevent damage to the holder 7 from external forces.
The device also comprises a driving device 12, a braking device 13 and a straight-moving control device 14; the driving device 12 is coaxially connected to the vertical ring 35; the brake device 13 is arranged below the driving device 12 and is rotatably connected with the bracket 1; the straight-moving control device is arranged inside the vertical ring 35 and is connected with the driving device 12. Under the action of external force, the driving device 12 completes straight-moving control and braking.
The driving device 12 comprises a shell 15, a mandril 16, a limit pin 17 and a cam 18; the ejector rod 16, the limiting pin 17 and the cam 18 are arranged inside the shell 15; the ejector rod 16 is coaxially connected with the vertical ring 35; the limiting pin 17 is fixedly connected with the shell 15, and the cam 18 is rotatably connected with the shell 15; the cam 18 is respectively connected with the limit pin 17 and the ejector rod 16 in a pressing mode.
The cam 18 is provided with a first limit surface 19, a second limit surface 20 and a third limit surface 21; the first limiting surface 19, the second limiting surface 20 and the third limiting surface 21 are not on the same plane; the caster wheels move straightly, and the ejector rod 16 is connected with the first limiting surface 19 in a jacking and pressing way; the caster wheel swings in a universal way, and the ejector rod 16 is connected with the second limiting surface 20 in a jacking and pressing way; the truckle locking, ejector pin 16 and third spacing face 21 roof pressure are connected. The caster provided by the invention comprises three states of straight running, universal swinging and braking. Three limiting surfaces are respectively used for the three states.
The cam 18 is provided with a limiting groove 22; the limiting pin 17 is respectively contacted with two ends of the limiting groove 22 to form a first limiting position 23 and a second limiting position 24; the limit pin 17 is contacted with the first limit position 23, and the ejector rod 16 is connected with the first limit surface 19 in a jacking and pressing way; the limit pin 17 is contacted with the second limit position 24, and the ejector rod 16 is connected with the third limit surface 21 in a pressing mode; the limit pin 17 is arranged between the first limit position 23 and the second limit position 24, and the ejector rod 16 is connected with the second limit surface 20 in a pressing mode.
The straight-moving control device 14 comprises a shaft 25, a control key 26 and a round spring pad 27; the shaft 25 is a hollow cavity and is coaxially sleeved and connected with the ejector rod 16; the circular elastic pad 27 is of an annular structure and is sleeved on the outer cylindrical surface of the shaft 25;
a first through groove 28 is formed in the cylindrical surface of the ejector rod 16, a second through groove 29 is formed in the cylindrical surface of the shaft 25, the control key 26 is fixed in the first through groove 28, two ends of the control key extend out, and the extending end of the control key 26 slides up and down in the second through groove 29;
the round elastic pad 27 is provided with a one-way control groove 30 along the straight-going direction of the caster, the control key 26 is connected with the one-way control groove 30, and the caster goes straight. In particular, the direction of the unidirectional control slot 30 is always the same as the direction of the straight caster.
The brake device 13 comprises a brake body 31; the brake body 31 is arranged below the ejector rod 16 and is rotatably connected with the bracket 1; two sides of the brake body 31 extend upwards to form brake plates 32, and the surfaces of the brake plates 32 corresponding to the wheels 2 are provided with sawtooth structures. When the caster is braked, the zigzag structure is embedded into the tire 9 for braking.
Specifically, the working method of the caster provided by the invention is as follows: the cam 18 rotates under the drive of external force to drive the mandril 16 to move downwards, when the mandril 16 is contacted with the first limit surface 19 of the cam 18, the control key 26 is connected with the single-row control groove 30, and the caster wheel moves straight; when the mandril 16 is contacted with the second limit surface 20 of the cam 18, the control key 26 is separated from the one-way control groove 30, and the caster can freely swing along the circumferential direction; when the ejector rod 16 and the third limiting surface 21 of the cam 18 are arranged, the ejector rod 16 drives the brake body 31 to rotate, the zigzag structure on the side surface of the brake plate 32 is embedded into the tire 9, and at the moment, the caster wheel can not swing or rotate, so that braking is completed.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. A caster, characterized by: the wheel type bicycle brake device comprises a support (1), wheels (2), a driving device (12) and a brake device (13), wherein the wheels (2) are rotatably connected to two sides of the support (1);
the support (1) comprises a sleeve (3) with a central shaft in the horizontal direction;
the wheel (2) comprises a wheel body (5), a retainer (7) and a plurality of rolling bodies (8); the wheel body (5) and the retainer (7) are of hollow annular structures; the retainer (7) is provided with rolling body fixing rings (33) in an array along the circumferential direction, and the rolling bodies (8) can be connected in the fixing rings (33) in a rolling manner; the wheel body (5) is sleeved on the outer surface of the retainer (7), and the retainer (7) is respectively sleeved on two sides of the outer surface of the sleeve (3); the rolling bodies (8) are respectively in contact connection with the wheel body (5) and the retainer (7);
the support (1) further comprises a horizontal ring (34) and a vertical ring (35); the axes of the horizontal ring (34) and the vertical ring (35) are vertically arranged, and the horizontal ring (34) and the vertical ring (35) are connected through a rib plate (36); the sleeve (3) is coaxially connected to a horizontal ring (34);
the driving device (12) is coaxially connected to the vertical ring (35); the brake device (13) is arranged below the driving device (12) and is rotatably connected with the bracket (1); the straight-moving control device is arranged inside the vertical ring (35) and is connected with the driving device (12);
the brake device (13) comprises a brake body (31); the brake body (31) is arranged below the ejector rod (16) and is rotatably connected with the bracket (1); the brake block is characterized in that two sides of the brake body (31) extend upwards to form brake plates (32), and saw-tooth-shaped structures are arranged on the surfaces, corresponding to the wheels (2), of the brake plates (32).
2. A castor according to claim 1, wherein: the wheel body (5) comprising a tyre (9) and a support ring (6); the tire (9) is coated on the outer cylindrical surface of the support ring (6); first rolling body mounting grooves (4) are formed in two sides of the outer surface of the sleeve (3) along the circumferential direction, second rolling body mounting grooves (10) are formed in the inner cylindrical surface of the support ring (6) along the circumferential direction, and the rolling bodies (8) are in contact connection with the first rolling body mounting grooves (4) and the second rolling body mounting grooves (10) respectively.
3. A castor according to claim 1, wherein: further comprising a shield (11); the shield (11) is coated on the outer surface of the bracket (1).
4. A castor according to claim 1, wherein: the driving device (12) comprises a shell (15), a mandril (16), a limit pin (17) and a cam (18); the ejector rod (16), the limiting pin (17) and the cam (18) are arranged in the shell (15); the ejector rod (16) is coaxially connected with the vertical ring (35); the limiting pin (17) is fixedly connected with the shell (15), and the cam (18) is rotatably connected with the shell (15); the cam (18) is respectively connected with the limit pin (17) and the ejector rod (16) in a pressing mode.
5. A castor according to claim 4, wherein: the cam (18) is provided with a first limiting surface (19), a second limiting surface (20) and a third limiting surface (21); the first limiting surface (19), the second limiting surface (20) and the third limiting surface (21) are not on the same plane; the ejector rod (16) is connected with the first limiting surface (19) in a jacking and pressing manner, and the caster wheels move straightly; the ejector rod (16) is connected with the second limiting surface (20) in a jacking and pressing manner, and the caster wheel swings in a universal manner; the ejector rod (16) is connected with the third limiting surface (21) in an abutting mode, and the caster wheel is locked.
6. A castor according to claim 5, wherein: the cam (18) is provided with a limiting groove (22); the limiting pin (17) is respectively contacted with two ends of the limiting groove (22) to form a first limiting position (23) and a second limiting position (24); the limiting pin (17) is contacted with the first limit position (23), and the ejector rod (16) is connected with the first limiting surface (19) in a jacking and pressing way; the limit pin (17) is contacted with the second limit position (24), and the ejector rod (16) is connected with the third limit surface (21) in a jacking and pressing way; the limiting pin (17) is arranged between the first limiting position (23) and the second limiting position (24), and the ejector rod (16) is connected with the second limiting surface (20) in a pressing mode.
7. A castor according to claim 6, wherein: the straight-moving control device (14) comprises a shaft (25), a control key (26) and a round spring pad (27); the shaft (25) is a hollow cavity and is coaxially sleeved and connected with the ejector rod (16); the round elastic pad (27) is of an annular structure and is sleeved on the outer cylindrical surface of the shaft (25);
a first through groove (28) is formed in the cylindrical surface of the ejector rod (16), a second through groove (29) is formed in the cylindrical surface of the shaft (25), the control key (26) is fixed in the first through groove (28), two ends of the control key extend out, and the extending end of the control key (26) slides up and down in the second through groove (29);
the round elastic pad (27) is provided with a one-way control groove (30) along the straight-going direction of the caster, the control key (26) is connected with the one-way control groove (30), and the caster goes straight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810289250.XA CN108422805B (en) | 2018-04-03 | 2018-04-03 | Caster wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810289250.XA CN108422805B (en) | 2018-04-03 | 2018-04-03 | Caster wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108422805A CN108422805A (en) | 2018-08-21 |
| CN108422805B true CN108422805B (en) | 2020-05-08 |
Family
ID=63160245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810289250.XA Active CN108422805B (en) | 2018-04-03 | 2018-04-03 | Caster wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108422805B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109203858B (en) * | 2018-10-12 | 2024-03-05 | 无锡赛飞滑泰脚轮制造有限公司 | Shock-absorbing castor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9002555D0 (en) * | 1990-02-06 | 1990-04-04 | Colson Castors Europ Ltd | Castor with brake mechanism |
| CN203920257U (en) * | 2014-04-11 | 2014-11-05 | 福州施可瑞光电科技有限公司 | Middle control single-wheel castor |
| CN204845381U (en) * | 2015-08-14 | 2015-12-09 | 宁波秀禾科技有限公司 | Accuse truckle in plastic |
| CN205800653U (en) * | 2016-05-03 | 2016-12-14 | 中山市诺贝五金制品有限公司 | A kind of castor that manual friction stopping device is set |
| CN206171036U (en) * | 2016-08-31 | 2017-05-17 | 福建施可瑞医疗科技股份有限公司 | Well accuse truckle with braking structure |
-
2018
- 2018-04-03 CN CN201810289250.XA patent/CN108422805B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108422805A (en) | 2018-08-21 |
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Effective date of registration: 20210323 Address after: Ouzhong Industrial Park, Zhongqiao International Logistics Science Park, No.2, ousheng Avenue, Pingwang Town, Wujiang District, Suzhou City, Jiangsu Province Patentee after: Tengde caster (Suzhou) Co.,Ltd. Address before: No.315, building 5, Ruiyun, No.99, Furong Zhongsan Road, Xishan Economic and Technological Development Zone, Wuxi City, Jiangsu Province Patentee before: WUXI CARE FREE CASTERS MANUFACTURING Co.,Ltd. |
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