CN209795063U - caster, chassis and electrical appliance - Google Patents
caster, chassis and electrical appliance Download PDFInfo
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- CN209795063U CN209795063U CN201822181587.7U CN201822181587U CN209795063U CN 209795063 U CN209795063 U CN 209795063U CN 201822181587 U CN201822181587 U CN 201822181587U CN 209795063 U CN209795063 U CN 209795063U
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- connecting rod
- wheel body
- castor
- bearing
- wheel
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Abstract
The utility model relates to a caster, a chassis and an electric appliance, wherein the caster comprises a caster body component and a connecting rod; the lower end of the connecting rod is connected with the wheel body assembly; the connecting rod is equipped with two at least draw-in grooves, the draw-in groove with the coaxial setting of connecting rod, just the locating part is established to the draw-in groove endotheca. Set up a plurality of draw-in grooves on the connecting rod and establish the locating part, every at every draw-in groove endotheca locating part in the draw-in groove can both carry on spacingly, consequently highly can adjusting during the truckle installation, can have multiple installation status, the regulation of truckle height can further influence the height of the equipment of using this truckle, and then influences the space occupancy of equipment, and then the storage and the cost of transportation of saving equipment.
Description
Technical Field
The utility model relates to the technical field of household appliances, especially, relate to a truckle, chassis and electrical apparatus.
background
Along with the continuous improvement of the quality of life, the types and the number of electric appliances in the life of people are more and more. At present, electrical appliances are developing towards intellectualization and miniaturization, but in the current development stage, the large number of electrical appliances still have the defects of large volume, heavy weight, very difficult movement and installation, large consumption of manpower and material resources, and certain danger even caused by movement or installation in some cases. In order to solve the difficulty of large-scale electrical apparatus removal installation, the truckle has been installed under the chassis of a lot of electrical apparatus, the installation of truckle can provide convenience for the removal and the installation of electrical apparatus, but present truckle also makes the height of electrical apparatus improve some, some improve a lot even, the promotion of height can influence the storage and the transportation of electrical apparatus, the space occupation ratio increase of electrical apparatus in storage and the transportation, the space utilization ratio of storage space and transportation space just reduces relatively, this also indirectly has increased the cost of storing and transporting.
Accordingly, there is a need to provide a caster, a chassis and an electrical appliance that address the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a truckle, chassis and use electrical apparatus.
A caster comprising a wheel body assembly and a link;
The lower end of the connecting rod is connected with the wheel body assembly;
The connecting rod is equipped with two at least draw-in grooves, the draw-in groove with the coaxial setting of connecting rod, just the locating part is established to the draw-in groove endotheca.
Further, the limiting piece is a limiting ring with a preset opening;
the inner circumferential surface of the limiting ring is connected with the circumferential surface of the clamping groove.
further, the axial length of the limiting ring is smaller than or equal to the axial length of the clamping groove.
Furthermore, the radian of the preset opening of the limiting ring is 15-45 degrees.
Furthermore, the upper end of the connecting rod is used for being connected with a caster hole, and the outer diameter of the limiting ring is larger than the diameter of the caster hole.
Furthermore, the outer diameter of the limiting ring is 0.5-1.5mm larger than the diameter of the caster hole.
Further, the axial distance between the adjacent clamping grooves is equal, and the axial distance between the adjacent clamping grooves is larger than the axial length of the caster hole.
Further, the axial distance between the adjacent clamping grooves is unequal, and the minimum distance between the adjacent clamping grooves is larger than the axial length of the caster hole.
Further, the wheel body assembly comprises a wheel frame and a wheel body;
The upper end of the wheel carrier is rotationally connected with the lower end of the connecting rod;
The lower end of the wheel frame is rotationally connected with the wheel body.
Further, the wheel carrier comprises an arc-shaped protection plate, a shaft sleeve coaxial with the arc-shaped protection plate, at least one connecting piece for connecting the arc-shaped protection plate and the shaft sleeve and a connecting rod sleeve connected with the outer side of the arc-shaped protection plate;
the radial direction of the middle line of the arc-shaped guard plate parallel to the axis of the arc-shaped guard plate is parallel to the axial direction of the connecting rod sleeve;
the lower end of the connecting rod is inserted into the connecting rod sleeve and can rotate;
The shaft sleeve is internally inserted with a rotating shaft, and the free end of the rotating shaft, which is far away from the shaft sleeve, is sleeved with the wheel body.
furthermore, the end surface of the lower end of the connecting rod sleeve is matched with the outer surface of the arc-shaped guard plate;
The upper end of the connecting rod sleeve is provided with a sealing plate, the sealing plate is provided with a connecting rod hole coaxial with the connecting rod sleeve, the lower end of the connecting rod penetrates through the connecting rod hole, and an upper limiting bulge and a lower limiting bulge are respectively arranged above and below the sealing plate.
further, a bearing is arranged in the shaft sleeve, one rotating shaft penetrating through two end faces of the bearing is arranged in the bearing, one end of the rotating shaft is sleeved with one wheel body, and the other end of the rotating shaft is sleeved with the other wheel body;
The outer ring of the bearing is connected with the inner surface of the shaft sleeve in an interference fit manner, and the inner ring of the bearing is connected with the rotating shaft in an interference fit manner;
The wheel body is cylindrical, and the wheel body and the rotating shaft are coaxially arranged.
furthermore, a bearing is arranged in the shaft sleeve, two rotating shafts which respectively penetrate through two end faces of the bearing are arranged in the bearing, and the wheel body is sleeved at one end of each of the two rotating shafts, which is positioned outside the shaft sleeve;
The outer ring of the bearing is connected with the inner surface of the shaft sleeve in an interference fit manner, and the inner ring of the bearing is respectively connected with the two rotating shafts in an interference fit manner;
The wheel body is cylindric, wheel body and rather than being connected the pivot coaxial arrangement.
further, the diameter of the wheel body is smaller than the inner diameter of the arc-shaped protection plate.
furthermore, the end surface of the outer side of the wheel body is provided with a chamfer.
Based on the same invention thought, the utility model also provides a chassis, including the truckle.
based on the same invention thought, the utility model also provides an electrical appliance, which comprises the truckle.
The technical scheme of the utility model compare with closest prior art and have following advantage:
the utility model provides a truckle that technical scheme provided has set up a plurality of draw-in grooves on the connecting rod and has established the locating part at every draw-in groove endotheca, every locating part in the draw-in groove can both carry on spacingly, consequently height when the truckle is installed can be adjusted, can have multiple installation status, and the regulation of truckle height can further influence the height of the equipment of using this truckle, and then influences the space occupancy of equipment, and then the storage and the cost of transportation of saving equipment.
Drawings
fig. 1 is a schematic structural view of a caster provided by the present invention;
fig. 2 is a first state structure diagram of the chassis provided by the present invention;
Fig. 3 is a structural schematic diagram of a second state of the chassis provided by the present invention;
fig. 4 is a schematic structural diagram of an electrical appliance provided by the present invention;
fig. 5 is a bottom view of the electrical appliance provided by the present invention;
fig. 6 is a front view of the electrical appliance provided by the present invention.
wherein, 1-connecting rod; 2-a card slot; 3-a limiting ring; 4-upper limiting protrusion; 5-connecting rod sleeve; 6-arc guard plate; 7-a wheel body; 8-a wheel body assembly; 9-a chassis; 10-caster holes; 11-caster wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the present invention provides a caster comprising a wheel body assembly 8 and a connecting rod 1; the lower end of the connecting rod 1 is connected with the wheel body assembly 8; the connecting rod 1 is provided with at least two clamping grooves 2, the clamping grooves 2 are coaxially arranged with the connecting rod 1, and the limiting parts are sleeved in the clamping grooves 2.
The connecting rod 1 is provided with a plurality of clamping grooves 2, and the limiting parts are sleeved in each clamping groove 2, each of the limiting parts in the clamping grooves 2 can be limited, so that the height of the caster during installation can be adjusted, various installation states can be realized, the height of equipment using the caster can be further influenced by adjusting the height of the caster, the space occupancy of the equipment is further influenced, and the storage and transportation cost of the equipment is further saved.
In some embodiments of the present invention, the limiting member is a limiting ring 3 having a predetermined opening; the inner circumferential surface of the limiting ring 3 is connected with the circumferential surface of the clamping groove 2, and the inner diameter of the limiting ring 3 is equal to the diameter of the clamping groove 2.
The inner diameter of the limiting ring 3 is equal to the diameter of the clamping groove 2, so that the limiting ring 3 can be prevented from radially shaking on the clamping groove 2, the position stability of the limiting ring is ensured, and the limiting effect of the limiting ring can be improved; the limiting ring 3 is provided with an opening I for facilitating the installation of the limiting ring 3, and for facilitating the deformation of the limiting ring 3 when the connecting rod 1 is adjusted.
In some embodiments of the present invention, the axial length of the stop collar 3 is less than or equal to the axial length of the slot 2.
The axial length of spacing ring 3 is when being less than or equal to the axial length of draw-in groove 2, spacing ring 3 can just install and get into draw-in groove 2, during the condition that equals, still have certain installation degree of difficulty, consequently the axial length of preferred spacing ring 3 is less than the axial length's of draw-in groove 2 the condition, but should not the undersize yet, should prevent that the installation back spacing ring 3 from taking place great axial rocking in draw-in groove 2, the difference between the two should be set for between 0.5mm to 1 mm.
In some embodiments of the present invention, the predetermined opening of the stop collar 3 has an arc of 15 ° to 45 °.
if the opening is smaller, the installation of the limiting ring 3 is more difficult; if the opening is large, the limiting ring 3 is easy to fall off from the clamping groove 2 to affect the limiting effect, and the openings with the radian of 15-45 degrees can meet the installation convenience and cannot fall off after the openings with different sizes are installed in the clamping groove 2 for comparison.
In some embodiments of the present invention, the upper end of the connecting rod 1 is used for connecting with the caster hole 10, and the outer diameter of the limiting ring 3 is larger than the diameter of the caster hole 10.
The outer diameter of the limiting ring 3 is larger than the diameter of the caster hole 10, the limiting ring 3 can only play a limiting role, but the difference between the two is not too large, when the axial pulling force or pushing force applied to the connecting rod 1 is larger than the deformation force threshold value, the limiting ring 3 can generate radial micro deformation, and the deformation can enable the connecting rod 1 to move relative to the caster hole 10 in the axial direction, so that the length of the connecting rod 1 inserted into the caster hole 10 can be adjusted, namely the height of a caster is adjusted;
In some embodiments of the present invention, the outer diameter of the stop collar 3 is 0.5-1.5mm larger than the diameter of the caster hole 10.
It has been described above that the difference between the outer diameter of the limiting ring 3 and the diameter of the caster hole 10 should not be too large, but also should not be too small, because too small, the limiting function is easily lost, so that the connecting rod 1 and the caster are difficult to be stabilized at a fixed height, through testing different difference conditions between the outer diameter of the limiting ring 3 and the diameter of the caster hole 10, the difference is within the range of 0.5-1.5mm, which can ensure a stable height when no pulling force or pushing force is applied to the connecting rod 1, after the pulling force or pushing force exceeds the deformation force threshold, the limiting ring 3 can be deformed, the height of the connecting rod 1 can be adjusted, and the deformation force threshold is not only greater than the gravity of a general electrical appliance, but also can be provided by one person to a force greater than the deformation force threshold.
In some embodiments of the present invention, the limiting ring 3 is formed by metal plate or injection molding. The limiting ring 3 manufactured by the two molding processes has a stable structure and is not easy to deform or break.
In some embodiments of the present invention, the axial distance between the adjacent two clamping grooves 2 is equal, and the axial distance between the adjacent two clamping grooves 2 is greater than the axial length of the caster hole 10.
In some embodiments of the present invention, the axial distance between the adjacent clamping grooves 2 is unequal, and the distance between the adjacent clamping grooves 2 is less than the axial length of the caster hole 10.
The two situations are the situations that the axial distances between the adjacent clamping grooves 2 are equal or unequal, the situation needs to be determined according to the service environment of the caster, namely, the situation needs to be determined according to the requirements of different states of the height of the caster, under any one situation, the axial distances between any two adjacent clamping grooves 2 are all larger than the axial length of the caster hole 10, so that the different limiting rings 3 can be respectively positioned above or below the caster hole 10, and each clamping groove 2 can be guaranteed to have the adjusting and positioning functions.
In some embodiments of the present invention, the wheel assembly 8 comprises a wheel frame and a wheel body 7; the upper end of the wheel carrier is rotationally connected with the lower end of the connecting rod 1; the lower end of the wheel carrier is rotationally connected with the wheel body 7.
The axis of the wheel body 7 rotating relative to the wheel frame and the axis of the wheel frame rotating relative to the connecting rod 1 are designed to be vertical, so that the two rotations are matched to realize the rotation of the caster wheel in all directions, namely the universal wheel.
In some embodiments of the present invention, the wheel carrier comprises an arc-shaped guard plate 6, a shaft sleeve coaxial with the arc-shaped guard plate 6, at least one connecting member for connecting the arc-shaped guard plate 6 with the shaft sleeve, and a connecting rod sleeve 5 connected with the outer side of the arc-shaped guard plate 6; the radial direction of the middle line of the arc-shaped guard plate 6 parallel to the axis of the arc-shaped guard plate is parallel to the axial direction of the connecting rod sleeve 5; the lower end of the connecting rod 1 is inserted into the connecting rod sleeve 5 and can rotate; a rotating shaft is inserted into the shaft sleeve, and the free end of the rotating shaft, which is far away from the shaft sleeve, is sleeved with the wheel body 7.
the arc-shaped protection plate 6 can protect the wheel body 7 from being clamped or damaged, so that the rotation of the wheel body is not influenced, the design also realizes the vertical direction of the two rotating shafts, and the caster is a universal wheel, so that the use convenience is improved.
in some embodiments of the present invention, the end surface of the lower end of the connecting rod sleeve 5 matches with the outer surface of the arc-shaped guard plate 6; the upper end of connecting rod sleeve pipe 5 is equipped with the shrouding, the shrouding be equipped with connecting rod hole coaxial with connecting rod sleeve pipe 5, 1 lower extreme of connecting rod runs through the connecting rod hole, connecting rod 1 in the top and the below of shrouding are equipped with spacing arch 4 and lower limit arch respectively.
The upper limiting protrusion 4 and the lower limiting protrusion are preferably designed into a ring shape, and are matched with a sealing plate to limit the connection between the connecting rod 1 and the connecting rod sleeve 5, that is, the connecting rod 1 and the wheel body assembly 8 are connected and limited, in order to improve the rotation flexibility of the connecting rod 1 and the wheel body assembly 8, the distance between the upper limiting protrusion 4 and the lower limiting protrusion should be greater than the thickness of the sealing plate, and it goes without saying that the outer diameters of the upper limiting protrusion 4 and the lower limiting protrusion should be greater than the hole of the connecting rod 1; in order to protect the arc-shaped protection plate 6 and the connecting rod 1, when the upper limiting protrusion 4 is in contact connection with the sealing plate, the lower end of the connecting rod 1 is not in contact with the outer surface of the arc-shaped protection plate 6, so as to prevent the arc-shaped protection plate 6 from being damaged.
In some embodiments of the present invention, a bearing is disposed in the shaft sleeve, a rotating shaft is disposed in the bearing and penetrates through two end surfaces of the bearing, one end of the rotating shaft is sleeved with one wheel body 7, and the other end of the rotating shaft is sleeved with the other wheel body 7; the outer ring of the bearing is connected with the inner surface of the shaft sleeve in an interference fit manner, and the inner ring of the bearing is connected with the rotating shaft in an interference fit manner; the wheel body 7 is cylindrical, and the wheel body 7 and the rotating shaft are coaxially arranged.
the design of the bearing can increase the rotation flexibility of the wheel body 7 relative to the wheel carrier, and realize the design of a rotation shaft in a given direction.
In some embodiments of the present invention, a bearing is disposed in the shaft sleeve, two rotating shafts respectively penetrating two end surfaces of the bearing are disposed in the bearing, and the wheel body 7 is sleeved on one end of each of the two rotating shafts outside the shaft sleeve; the outer ring of the bearing is connected with the inner surface of the shaft sleeve in an interference fit manner, and the inner ring of the bearing is respectively connected with the two rotating shafts in an interference fit manner; the wheel bodies 7 are cylindrical, and the wheel bodies 7 are coaxially arranged with the rotating shaft connected with the wheel bodies 7.
Two the design of pivot has increased every wheel body 7 pivoted flexibility and independence, has also reduced the power that the pivot bore, does benefit to the long-term use of pivot, has avoided the maintenance cost that frequent change brought.
In some embodiments of the present invention, the diameter of the wheel body 7 is smaller than the inner diameter of the arc-shaped guard plate 6.
Therefore, the contact between the wheel body 7 and the arc-shaped protection plate 6 can be prevented, the free rotation of the wheel body 7 is prevented from being influenced, and the rotation flexibility of the wheel body 7 is improved.
In some embodiments of the present invention, the end surface of the outer side of the wheel body 7 is provided with a chamfer.
The chamfered design increases the mobility of the wheel 7 during its movement, further increasing the maneuverability and response speed of the wheel assembly 8 during rotation.
As shown in fig. 2 and 3, based on the same inventive concept, the present invention further provides a chassis, wherein the chassis 9 is provided with at least one caster hole 10, the length of the connecting rod 1 of the caster 11 inserted into the caster hole 10 is adjustable, and the chassis 9 becomes a movable and height-adjustable chassis through the caster 11.
As shown in fig. 4 to 6, based on the same invention concept, the utility model also provides an electrical appliance, which can be a refrigerator, a freezer, a cabinet air conditioner, a water dispenser, etc., wherein the chassis of the electrical appliance is provided with at least one caster hole 10, the connecting rod 1 of the caster 11 is inserted into the caster hole 10 and the inserted length can be adjusted, the electrical appliance becomes a movable electrical appliance with adjustable height through the caster 11, the height of the electrical appliance can be adjusted by adjusting the inserted length, and the height of the electrical appliance is further reduced during storage and transportation, thereby reducing the space occupancy of the electrical appliance and finally saving the cost of storage and transportation.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (17)
1. A castor, characterized in that it comprises a wheel body assembly (8) and a link (1);
The lower end of the connecting rod (1) is connected with the wheel body component (8);
The connecting rod (1) is provided with at least two clamping grooves (2), the clamping grooves (2) are coaxially arranged with the connecting rod (1), and the limiting parts are sleeved in the clamping grooves (2).
2. a castor according to claim 1, characterized in that said stop member is a stop ring (3) having a predetermined opening;
The inner circumferential surface of the limiting ring (3) is connected with the circumferential surface of the clamping groove (2).
3. A castor according to claim 2, characterized in that the axial length of the stop collar (3) is less than or equal to the axial length of the locking groove (2).
4. A castor according to claim 2, characterized in that the predetermined opening of the stop collar (3) has an arc of 15 ° -45 °.
5. A castor according to claim 2, characterized in that the upper end of the connecting rod (1) is adapted to be connected to a castor hole (10), and the stop ring (3) has an outer diameter larger than the diameter of the castor hole (10).
6. a castor according to claim 5, characterized in that the outer diameter of the stop collar (3) is 0.5-1.5mm larger than the diameter of the castor hole (10).
7. A castor according to claim 5, wherein the axial distance between adjacent slots (2) is equal, and the axial distance between adjacent slots (2) is greater than the axial length of the castor hole (10).
8. A castor according to claim 5, wherein the axial distances between adjacent slots (2) are unequal and the smallest distance between adjacent slots (2) is greater than the axial length of the castor hole (10).
9. A castor according to claim 1, characterised in that the wheel assembly (8) comprises a wheel carrier and a wheel body (7);
The upper end of the wheel carrier is rotationally connected with the lower end of the connecting rod (1);
The lower end of the wheel carrier is rotationally connected with the wheel body (7).
10. A castor according to claim 9, characterized in that said wheel carrier comprises a curved fender (6), a shaft sleeve coaxial with said curved fender (6), at least one connecting member for connecting said curved fender (6) to said shaft sleeve and a connecting rod sleeve (5) connected to the outside of said curved fender (6);
the radial direction of the center line of the arc-shaped guard plate (6) parallel to the axis of the arc-shaped guard plate is parallel to the axial direction of the connecting rod sleeve (5);
The lower end of the connecting rod (1) is inserted into the connecting rod sleeve (5) and can rotate;
The shaft sleeve is internally inserted with a rotating shaft, and the free end of the rotating shaft, which is far away from the shaft sleeve, is sleeved with the wheel body (7).
11. a castor according to claim 10, wherein the end surface of the lower end of the connecting rod sleeve (5) matches the outer surface of the arc-shaped cover (6);
The upper end of connecting rod sleeve pipe (5) is equipped with the shrouding, the shrouding be equipped with the coaxial connecting rod hole of connecting rod sleeve pipe (5), connecting rod (1) lower extreme runs through the connecting rod hole, connecting rod (1) in the top and the below of shrouding are equipped with spacing arch (4) and lower limit arch respectively.
12. A castor according to claim 10, wherein a bearing is provided in the shaft sleeve, a rotating shaft is provided in the bearing and penetrates through two end surfaces of the bearing, one end of the rotating shaft is sleeved with one wheel body (7), and the other end of the rotating shaft is sleeved with the other wheel body (7);
the outer ring of the bearing is connected with the inner surface of the shaft sleeve in an interference fit manner, and the inner ring of the bearing is connected with the rotating shaft in an interference fit manner;
The wheel body (7) is cylindrical, and the wheel body (7) and the rotating shaft are coaxially arranged.
13. A caster wheel according to claim 10, wherein a bearing is arranged in the shaft sleeve, two rotating shafts respectively penetrating through two end surfaces of the bearing are arranged in the bearing, and one ends of the two rotating shafts, which are positioned outside the shaft sleeve, are sleeved with the wheel body (7);
The outer ring of the bearing is connected with the inner surface of the shaft sleeve in an interference fit manner, and the inner ring of the bearing is respectively connected with the two rotating shafts in an interference fit manner;
The wheel body (7) is cylindrical, and the wheel body (7) and the rotating shaft connected with the wheel body are coaxially arranged.
14. a castor according to claim 12 or 13, wherein the diameter of the wheel body (7) is smaller than the inner diameter of the arc-shaped shield (6).
15. a castor according to claim 12 or 13, characterised in that the outer side of the body (7) is chamfered at its end face.
16. a chassis, characterized in that it comprises a castor (11) according to any one of claims 1 to 15.
17. An electrical consumer, characterized in that it comprises a castor (11) according to any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181587.7U CN209795063U (en) | 2018-12-24 | 2018-12-24 | caster, chassis and electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181587.7U CN209795063U (en) | 2018-12-24 | 2018-12-24 | caster, chassis and electrical appliance |
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| Publication Number | Publication Date |
|---|---|
| CN209795063U true CN209795063U (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822181587.7U Active CN209795063U (en) | 2018-12-24 | 2018-12-24 | caster, chassis and electrical appliance |
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| CN (1) | CN209795063U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109551966A (en) * | 2018-12-24 | 2019-04-02 | 珠海格力电器股份有限公司 | A kind of castor, chassis and electrical appliance |
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2018
- 2018-12-24 CN CN201822181587.7U patent/CN209795063U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109551966A (en) * | 2018-12-24 | 2019-04-02 | 珠海格力电器股份有限公司 | A kind of castor, chassis and electrical appliance |
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