阅读说明：本技术 一种万向脚轮 (Universal caster ) 是由 张艳秋 张瑞东 于 2021-10-28 设计创作，主要内容包括：发明公开了一种万向脚轮,包括固定件、脚轮,固定件设置有圆筒,脚轮设置有插杆,圆筒的中间有内壁光滑的圆柱形空间,插杆可相对于圆筒旋转和沿插杆的轴向方向滑动,插杆为外壁光滑的圆形棒,圆筒的下端面悬空,圆形棒的外侧壁与圆柱形空间的内侧壁之间涂有油脂,圆形棒的外径与圆柱形空间的内径匹配且圆形棒的顶面与圆筒的的圆柱形空间密封有可缓冲作用的气柱,插杆与圆筒的密封可形成负压来阻止插杆掉落或阻止圆形棒的顶面与圆筒的上端接触。通过在圆形棒的顶面与圆筒的的圆柱形空间密封有可缓冲作用的气柱,插杆与圆筒的密封可在插杆掉落时形成负压来阻止插杆掉落或在插杆受力时阻止圆形棒的顶面与圆筒的上端接触,大大减小了摩擦力。(The invention discloses a universal caster which comprises a fixing part and a caster, wherein the fixing part is provided with a cylinder, the caster is provided with an inserted rod, a cylindrical space with a smooth inner wall is arranged in the middle of the cylinder, the inserted rod can rotate relative to the cylinder and slide along the axial direction of the inserted rod, the inserted rod is a circular rod with a smooth outer wall, the lower end surface of the cylinder is suspended, grease is coated between the outer side wall of the circular rod and the inner side wall of the cylindrical space, the outer diameter of the circular rod is matched with the inner diameter of the cylindrical space, a gas column with a buffering effect is sealed between the top surface of the circular rod and the cylindrical space of the cylinder, and negative pressure can be formed between the inserted rod and the cylinder to prevent the inserted rod from falling or prevent the top surface of the circular rod from contacting with the upper end of the cylinder. But through the sealed gas column that has the cushioning effect in the cylindrical space of the top surface of circular stick and drum, the sealed negative pressure that can form when the inserted bar drops of inserted bar and drum prevents that the inserted bar from dropping or prevent the top surface of circular stick and the upper end contact of drum when the inserted bar atress, has reduced frictional force greatly.)

1. A universal caster, characterized in that: including mounting, truckle, wherein the centre of mounting is provided with the drum, the truckle is provided with the inserted bar, the centre of drum has the smooth cylindrical space of inner wall so that the inserted bar inserts in the drum from the lower extreme of drum, the inserted bar can rotate and slide along the axial direction of inserted bar for the drum, the inserted bar is the smooth circular stick of outer wall, the lower terminal surface of drum is unsettled, scribble between the lateral wall of circular stick and the inside wall of cylindrical space and be used for sealed grease, the external diameter of circular stick matches and the cylindrical space's of the top surface of circular stick and the cylindrical space of drum seals has the air column that can cushioning effect, the sealed of inserted bar and drum can form the negative pressure when the inserted bar drops and prevent the inserted bar and drop or prevent the top surface of circular stick and the upper end contact of drum when the inserted bar atress.

2. The caster according to claim 1, wherein said plunger is inserted into the cylinder for a length of half the length of the cylinder.

3. The caster according to claim 1, wherein said grease is silicone oil.

Technical Field

The invention relates to the technical field of casters, in particular to a universal caster.

Background

At present, universal casters are used in the aspects of small transport vehicles and home, generally, the inserting rods of the casters are directly inserted into the cylinders of the fixing parts, the bottoms of the cylinders are propped against the lower ends of the inserting rods of the casters, the friction resistance of the cylinders is large when the cylinders rotate relative to the inserting rods, and the cylinders are easily clamped relative to the inserting rods, so that the universal casters cannot rotate in the horizontal direction.

Disclosure of Invention

The invention aims to provide a universal caster and solve the problem that the universal caster is easy to block.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a universal caster, including the mounting, the truckle, wherein the centre of mounting is provided with the drum, the truckle is provided with the inserted bar, there is the smooth cylindrical space of inner wall in the centre of drum so that the inserted bar inserts in the drum from the lower extreme of drum, the inserted bar can rotate and slide along the axial direction of inserted bar for the drum, the inserted bar is the smooth circular stick of outer wall, the lower terminal surface of drum is unsettled, scribble between the lateral wall of circular stick and the inside wall of cylindrical space and be used for sealed grease, the external diameter of circular stick matches and the top surface of circular stick and the cylindrical space of drum seals has the gas column that can cushioning effect, the sealed of inserted bar and drum can form the negative pressure when the inserted bar drops and prevent the inserted bar to drop or prevent the top surface of circular stick and the upper end contact of drum when the inserted bar atress.

Preferably, the grease is silicone oil.

Preferably, the insertion rod is inserted into the cylinder by a length of half the length of the cylinder.

The beneficial effects of the technical scheme are as follows: but through the sealed gas column that has the cushioning effect in the cylindrical space of the top surface of circular stick and drum, the sealed negative pressure that can form when the inserted bar drops of inserted bar and drum prevents that the inserted bar from dropping or prevent the top surface of circular stick and the upper end contact of drum when the inserted bar atress, has reduced frictional force greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic of the present invention.

In the figure, 1-fixed part, 2-caster, 3-cylinder, 4-inserted rod.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to the drawings, a caster comprises a fixed member 1, the truckle 2, wherein the centre of mounting 1 is provided with drum 3, truckle 2 is provided with inserted bar 4, there is the smooth cylindrical space of inner wall in the centre of drum 3 so that inserted bar 4 inserts in drum 3 from the lower extreme of drum 3, inserted bar 4 can rotate and slide along the axial direction of inserted bar 4 for drum 3, inserted bar 4 is the smooth circular stick of outer wall, the lower terminal surface of drum 3 is unsettled, scribble between the lateral wall of circular stick and the inside wall of cylindrical space and be used for sealed grease, the external diameter of circular stick matches with the internal diameter of cylindrical space and the top surface of circular stick and the cylindrical space of drum 3 seal has the air column that can cushioning effect, the sealed of inserted bar 4 and drum 3 can form the negative pressure when the inserted bar 4 falls and prevent that inserted bar 4 from dropping or prevent the top surface of circular stick and the upper end contact of drum 3 when inserted bar 4 atress. The fixture 1 is typically a part to be fixed on a small trailer or some household.

Preferably, the grease is silicone oil. The silicone oil is not easy to volatilize and can be used for more than ten years.

Preferably, the insertion rod 4 is inserted into the cylinder 3 by a length half of the length of the cylinder 3.

During the assembly process, grease is firstly coated on the bottom of the inner wall of the cylinder, the top of the cylinder is reserved for ventilation, the insertion is stopped when the insertion rod is inserted into a half of the cylinder, the grease can be coated on the whole inner side wall of the cylinder after the insertion rod is rotated, and thus a section of air column is formed between the top surface of the insertion rod and the cylinder.

According to the invention, the air column with a buffering effect is sealed in the cylindrical space between the top surface of the round rod and the cylinder 3, and the sealing between the inserted rod 4 and the cylinder 3 can form negative pressure when the inserted rod 4 falls to prevent the inserted rod 4 from falling or prevent the top surface of the round rod from contacting with the upper end of the cylinder 3 when the inserted rod 4 is stressed, so that the friction force is greatly reduced.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.