CN113212066A - Novel trundle device - Google Patents
Novel trundle device Download PDFInfo
- Publication number
- CN113212066A CN113212066A CN202110534970.XA CN202110534970A CN113212066A CN 113212066 A CN113212066 A CN 113212066A CN 202110534970 A CN202110534970 A CN 202110534970A CN 113212066 A CN113212066 A CN 113212066A
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- Prior art keywords
- wheel
- face
- caster
- outer ring
- bearing
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- 238000005299 abrasion Methods 0.000 claims abstract description 8
- 230000002035 prolonged effect Effects 0.000 claims abstract description 4
- 210000004907 gland Anatomy 0.000 claims description 18
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 235000004443 Ricinus communis Nutrition 0.000 claims 3
- 238000011065 in-situ storage Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
Abstract
The invention provides a novel caster device, which reduces the resistance of a caster when the caster rotates in situ, thereby reducing the abrasion speed of a wheel body. It comprises a caster wheel mounting seat and wheels; the caster wheel mounting seat is integrated with a rotating shaft part and a wheel assembling frame, the rotating shaft part drives the whole wheel assembling frame to rotate, and the wheel assembling frame is used for mounting the wheel; the wheel comprises a supporting outer ring and a central assembling part, the bottom of the supporting outer ring is supported on the ground, and the central assembling part is fixedly connected to the wheel assembling frame; the rotating center shaft of the rotating shaft part is vertically arranged, the offset distance of the center point of the thickness direction of the wheel relative to the parallel arrangement surface of the wheel where the rotating center shaft is located is p, so that a deflection angle theta exists between a connecting line between the rotating center shaft and the center point of the thickness direction of the wheel and the parallel arrangement surface of the wheel, and the abrasion rate of the wheel is reduced by introducing the deflection angle theta, so that the service life of the wheel is prolonged.
Description
Technical Field
The invention relates to the technical field of industrial caster wheel structures, in particular to a novel caster wheel device.
Background
In the field of modern industrial property handling, the universal caster is particularly widely used and has a structure allowing horizontal 360-degree rotation. The caster wheel has high use frequency in daily work and bad use environment.
The structure of the industrial caster wheel on the market is shown in figure 1, and two sides of the wheel are connected with two side steel plates of a caster wheel bracket through bolts. The truckle often meets the operating mode that the wheel turned to in the use, sometimes often meets the operating mode that the pivot turned to because of reasons such as place restriction, and the wheel need pivot 90 degrees under this condition, and the wheel receives dry friction this moment, and the wheel can wear and tear through long-term use.
Therefore, how to design a caster so that the wheel is not subjected to dry friction force during the in-situ rotation process or the dry friction force is small enough not to cause wheel abrasion is a technical problem which needs to be solved urgently by a caster structure.
Disclosure of Invention
In view of the above problems, the present invention provides a novel caster device, which reduces the resistance of a caster when the caster rotates in situ, thereby reducing the wear rate of the caster body.
A novel caster device is characterized in that: it comprises a caster wheel mounting seat and wheels;
the caster wheel mounting seat is integrated with a rotating shaft part and a wheel assembling frame, the rotating shaft part drives the whole wheel assembling frame to rotate, and the wheel assembling frame is used for mounting the wheel;
the wheel comprises a supporting outer ring and a central assembling part, the bottom of the supporting outer ring is supported on the ground, and the central assembling part is fixedly connected to the wheel assembling frame;
the rotating center shaft of the rotating shaft part is vertically arranged, the offset distance of the center point of the thickness direction of the wheel relative to the parallel arrangement surface of the wheel where the rotating center shaft is located is p, so that a deflection angle theta exists between a connecting line between the rotating center shaft and the center point of the thickness direction of the wheel and the parallel arrangement surface of the wheel, and the abrasion rate of the wheel is reduced by introducing the deflection angle theta, so that the service life of the wheel is prolonged.
It is further characterized in that:
the deflection angle theta is increased, the force in the wheel walking direction is increased, the force perpendicular to the wheel walking direction is reduced, the force perpendicular to the wheel walking direction is represented as dry friction in the wheel rotating process, and the force along the wheel walking direction is represented as rolling friction in the wheel rotating process;
preferably, the wheel assembly rack includes a vertical plate with one side protruding downward, one end surface of the wheel is disposed toward the vertical plate, a thickness direction center point of the wheel is disposed toward a side away from the vertical plate, an offset distance between the thickness direction center point of the wheel and a wheel parallel disposition surface corresponding to the rotation center axis is p, and the wheel is located in a lower portion assembly surface area of the wheel assembly rack;
the central assembly part comprises a bolt, a shaft sleeve, an inner ring gland, an outer ring gland and a bearing, wherein an axial through hole is formed in the vertical plate, a bearing positioning hole is formed in the radial central position of the wheel, the inner end face of the bearing positioning hole faces the vertical plate, the outer end face of the bearing positioning hole is far away from the vertical plate, the bolt penetrates through the axial through hole and then is arranged towards the bearing positioning hole, the shaft sleeve is inserted into the bearing positioning hole from the outer end face and fixedly sleeved at the corresponding position of the bolt, the outer ring face of the part, corresponding to the bearing positioning hole, of the shaft sleeve is sleeved with the inner ring of the bearing, the outer ring of the bearing is tightly attached to the corresponding outer ring wall of the bearing positioning hole and is arranged, the outer end face of the inner ring of the bearing is covered with the inner ring gland, and the outer ring gland is covered on the outer end face of the outer ring of the bearing, and a nut is in threaded connection with the corresponding end of the bolt, The inner ring gland is tightly pressed and attached, so that the wheel can be assembled and disassembled only by fastening or loosening a single bolt and a single nut, and the wheel is quickly and conveniently assembled and disassembled;
the end face, facing the wheel, of the vertical plate is welded with a spacing sleeve at a position corresponding to the axial through hole, the inner end face of the shaft sleeve is arranged close to the outer end face of the spacing sleeve, a central hole of the spacing sleeve is convenient for a bolt to penetrate through, the bolt is stably and reliably arranged in the horizontal direction, and the offset distance p is set according to actual requirements due to the arrangement of the spacing sleeve.
After the technical scheme is adopted, the principle of the caster wheel is shown in figure 2, when the caster wheel rotates on site, an offset distance p exists, and the stress of the caster wheel is shown in figure 2. The steering force F experienced by the wheels can be decomposed into a force Ft in the direction of wheel travel and a force Fn perpendicular to the direction of wheel travel:
as can be seen from the above formula, as the deflection angle θ increases, the force Ft in the wheel traveling direction increases, the force Fn perpendicular to the wheel traveling direction decreases, the force Fn perpendicular to the wheel traveling direction shows dry friction during the rotation of the wheel, the force Ft in the wheel traveling direction shows rolling friction during the rotation of the wheel, and if the deflection angle θ does not exist, the steering force applied to the wheel is completely perpendicular to the wheel traveling direction, and all the forces show dry friction during the steering of the wheel. Therefore, the offset distance p is introduced to generate the deflection angle theta, the corresponding offset distance p is determined according to the bearable force of the material corresponding to the outer ring of the wheel support, the abrasion rate of the wheel is reduced, and the service life of the wheel is prolonged; the resistance of the caster wheel during the rotation in situ is reduced, so that the abrasion speed of the wheel body is reduced.
Drawings
FIG. 1 is a schematic view of a conventional industrial caster;
FIG. 2 is a schematic top view of a caster according to the present invention;
FIG. 3 is a front view partially in section schematic illustration of an embodiment of the invention;
FIG. 4 is a schematic right side view of the structure of FIG. 3;
FIG. 5 is a schematic top view of the structure of FIG. 3;
the names corresponding to the sequence numbers in the figure are as follows:
the caster wheel mounting seat 10, the rotating shaft part 11, the wheel assembling frame 12, the vertical plate 13, the spacing sleeve 14, the wheel 20, the supporting outer ring 21, the bearing positioning hole 22, the central assembling part 30, the bolt 31, the shaft sleeve 32, the inner ring gland 33, the outer ring gland 34, the bearing 35 and the nut 36
A rotation center axis 100, a thickness direction center point 200, a wheel parallel arrangement surface 300, and a connection line 400.
Detailed Description
A novel caster device, see fig. 2-5: the caster comprises a caster mounting seat 10 and wheels 20;
the caster wheel mounting seat 10 is integrated with a rotating shaft part 11 and a wheel assembling frame 12, the rotating shaft part 11 drives the wheel assembling frame 12 to integrally rotate, and the wheel assembling frame 12 is used for mounting a wheel 20;
the wheel 20 comprises a supporting outer ring 21 and a central assembling part 30, wherein the bottom of the supporting outer ring 21 is supported on the ground, and the central assembling part 30 is fixedly connected to the wheel assembling frame 12;
the turning center shaft 100 of the turning shaft portion 11 is arranged vertically, and the offset distance p of the thickness direction center point 200 of the wheel 20 with respect to the wheel parallel arrangement surface 300 on which the turning center shaft 100 is located is set so that an offset angle θ exists between the connecting line 400 between the turning center shaft 100 and the thickness direction center point 200 of the wheel 20 and the wheel parallel arrangement surface 300, and the wear rate of the wheel is slowed down by introducing this offset angle θ, thereby increasing the service life of the wheel 20.
The existing caster device has no eccentricity between the running direction and the rotating direction of the caster. When the caster is in the pivot rotation condition, if there is the eccentricity, the force exerted on the wheel is as shown in fig. 2, and the steering force F exerted on the wheel 20 can be decomposed into a force Ft along the wheel traveling direction and a force Fn perpendicular to the wheel traveling direction:
as can be seen from the above formula, as the deflection angle θ increases, the force Ft in the wheel traveling direction increases, the force Fn perpendicular to the wheel traveling direction decreases, the force Fn perpendicular to the wheel traveling direction shows dry friction during the rotation of the wheel, the force Ft in the wheel traveling direction shows rolling friction during the rotation of the wheel, and if the deflection angle θ does not exist, the steering force applied to the wheel is completely perpendicular to the wheel traveling direction, and all the forces show dry friction during the steering of the wheel. Thus, introducing the offset distance p, and thus the offset angle θ, slows the wear rate of the wheel.
The specific embodiment, see fig. 3-5, uses a single-sided cantilever to mount the wheel 20: the wheel assembling frame 12 comprises a vertical plate 13 (namely, a cantilever) with one side being downward convex, one end surface of the wheel 20 is arranged towards the vertical plate 13, the thickness direction center point 200 of the wheel 20 is arranged towards one side far away from the vertical plate 13, the offset distance between the thickness direction center point 200 of the wheel 20 and a wheel parallel arrangement surface 300 corresponding to the rotation center shaft 100 is p, namely, the caster walking center line and the caster rotation center line have an offset distance p, and the wheel 20 is positioned in the lower assembling surface area of the wheel assembling frame 12;
the central assembly portion 30 includes a bolt 31, a shaft sleeve 32, an inner ring gland 33, an outer ring gland 34, and a bearing 35, wherein an axial through hole is provided on the vertical plate 13, a bearing positioning hole 22 is provided at a radial central position of the wheel 20, an inner end surface of the bearing positioning hole 22 is disposed toward the vertical plate 13, an outer end surface of the bearing positioning hole 22 is disposed away from the vertical plate 13, the bolt 31 is disposed toward the bearing positioning hole 22 after penetrating through the axial through hole, the shaft sleeve 32 is inserted into the bearing positioning hole 22 from the outer end surface and fixedly sleeved on a corresponding position of the bolt 31, an inner ring of the bearing 35 is sleeved on an outer ring surface of a portion of the shaft sleeve 32 corresponding to the bearing positioning hole 22, an outer ring of the bearing 35 is disposed closely attached to a corresponding outer ring wall of the bearing positioning hole 22, the outer end surface of the inner ring of the bearing 35 is capped with the inner ring gland 34, the outer ring gland 34 is capped on an outer ring surface of the outer ring of the bearing 35, the outer ring gland 34 is further fixedly mounted on the wheel body, the nut 36 is in threaded connection with the corresponding end of the bolt 31 and is fastened and pressed on the inner ring gland 34, the shaft sleeve 32 is connected with the corresponding position of the bolt 31 through interference fit to prevent the shaft sleeve 32 and the bolt 31 from rotating mutually, the outer ring groove of the shaft sleeve 32, which is far away from the vertical plate 13, is used for fixing the inner ring of the bearing 35, so that the wheel 20 can be assembled and disassembled only by fastening or loosening the single bolt 31 and the nut 36, and the wheel is assembled and disassembled quickly and conveniently;
in specific implementation, the bearing 35 is a tapered roller bearing; the end face of the vertical plate 13 facing the wheel 20 is welded with a spacing sleeve 14 at a position corresponding to the axial through hole, the inner end face of the shaft sleeve 32 is arranged closely to the outer end face of the spacing sleeve 14, the central hole of the spacing sleeve 14 facilitates the penetration of the bolt 31 and enables the horizontal arrangement of the bolt 31 to be stable and reliable, and the offset distance p is set according to actual requirements due to the arrangement of the spacing sleeve 14.
The working principle is as follows: introducing an offset distance p to generate an offset angle theta, determining the corresponding offset distance p according to the bearable force of the material corresponding to the outer ring of the wheel support, and slowing down the wear rate of the wheel so as to prolong the service life of the wheel; the resistance of the caster wheel during the rotation in situ is reduced, so that the abrasion speed of the wheel body is reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A novel caster device is characterized in that: it comprises a caster wheel mounting seat and wheels;
the caster wheel mounting seat is integrated with a rotating shaft part and a wheel assembling frame, the rotating shaft part drives the whole wheel assembling frame to rotate, and the wheel assembling frame is used for mounting the wheel;
the wheel comprises a supporting outer ring and a central assembling part, the bottom of the supporting outer ring is supported on the ground, and the central assembling part is fixedly connected to the wheel assembling frame;
the rotating center shaft of the rotating shaft part is vertically arranged, the offset distance of the center point of the thickness direction of the wheel relative to the parallel arrangement surface of the wheel where the rotating center shaft is located is p, so that a deflection angle theta exists between a connecting line between the rotating center shaft and the center point of the thickness direction of the wheel and the parallel arrangement surface of the wheel, and the abrasion rate of the wheel is reduced by introducing the deflection angle theta, so that the service life of the wheel is prolonged.
2. A novel castor assembly according to claim 1 wherein: the slip angle θ increases, the force in the wheel traveling direction increases, the force perpendicular to the wheel traveling direction decreases, the force perpendicular to the wheel traveling direction appears as dry friction during the rotation of the wheel, and the force in the wheel traveling direction appears as rolling friction during the rotation of the wheel.
3. A novel castor assembly according to claim 1 wherein: the wheel assembling frame comprises a vertical plate with one side protruding downwards, one end face of each wheel is arranged towards the vertical plate, the center point of the wheel in the thickness direction faces towards one side far away from the vertical plate, the offset distance between the center point of the wheel in the thickness direction and the parallel arrangement face of the wheel corresponding to the rotary central shaft is p, and the wheel is located in the lower assembling face of the wheel assembling frame.
4. A novel castor assembly according to claim 3 wherein: the central assembly part comprises a bolt, a shaft sleeve, an inner ring gland, an outer ring gland and a bearing, wherein an axial through hole is formed in the vertical plate, a bearing positioning hole is formed in the radial central position of the wheel, the inner end face of the bearing positioning hole faces the vertical plate, the outer end face of the bearing positioning hole is far away from the vertical plate, the bolt penetrates through the axial through hole and then is arranged towards the bearing positioning hole, the shaft sleeve is inserted into the bearing positioning hole from the outer end face and fixedly sleeved at the corresponding position of the bolt, the outer ring face of the part, corresponding to the bearing positioning hole, of the shaft sleeve is sleeved with the inner ring of the bearing, the outer ring of the bearing is tightly attached to the corresponding outer ring wall of the bearing positioning hole and is arranged, the outer end face of the inner ring of the bearing is covered with the inner ring gland, and the outer ring gland is covered on the outer end face of the outer ring of the bearing, and a nut is in threaded connection with the corresponding end of the bolt, And is tightly pressed and attached to the inner ring gland.
5. The novel caster device of claim 4, wherein: the end face, facing the wheel, of the vertical plate is welded with a spacing sleeve at a position corresponding to the axial through hole, the inner end face of the shaft sleeve is arranged close to the outer end face of the spacing sleeve, a central hole of the spacing sleeve is convenient for a bolt to penetrate through, the bolt is stably and reliably arranged in the horizontal direction, and the offset distance p is set according to actual requirements due to the arrangement of the spacing sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534970.XA CN113212066A (en) | 2021-05-17 | 2021-05-17 | Novel trundle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534970.XA CN113212066A (en) | 2021-05-17 | 2021-05-17 | Novel trundle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113212066A true CN113212066A (en) | 2021-08-06 |
Family
ID=77092405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110534970.XA Pending CN113212066A (en) | 2021-05-17 | 2021-05-17 | Novel trundle device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113212066A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310107A (en) * | 1995-10-18 | 2001-08-29 | 杰维斯B·韦布国际公司 | Castor |
| US20050144755A1 (en) * | 2004-01-06 | 2005-07-07 | Etsuo Miyoshi | Bag with caster wheels |
| WO2019196757A1 (en) * | 2018-04-08 | 2019-10-17 | AIrobot株式会社 | Universal wheel, traveling mechanism and autonomous moving transport robot |
| CN210363201U (en) * | 2019-05-15 | 2020-04-21 | 中山向荣脚轮制造有限公司 | Caster rotating structure and caster |
-
2021
- 2021-05-17 CN CN202110534970.XA patent/CN113212066A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310107A (en) * | 1995-10-18 | 2001-08-29 | 杰维斯B·韦布国际公司 | Castor |
| US20050144755A1 (en) * | 2004-01-06 | 2005-07-07 | Etsuo Miyoshi | Bag with caster wheels |
| WO2019196757A1 (en) * | 2018-04-08 | 2019-10-17 | AIrobot株式会社 | Universal wheel, traveling mechanism and autonomous moving transport robot |
| CN210363201U (en) * | 2019-05-15 | 2020-04-21 | 中山向荣脚轮制造有限公司 | Caster rotating structure and caster |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210806 |