CN210941180U

CN210941180U - Novel caster

Info

Publication number: CN210941180U
Application number: CN201921576366.8U
Authority: CN
Inventors: 沈义勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-07-07
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a novel caster, which comprises a shell and a caster component; the caster wheel assembly comprises a first shell fixedly connected with the shell, a second shell in threaded connection with the first shell and provided with a circular through hole, and a universal ball device embedded in the circular through hole of the second shell and protruding out of the second shell; the universal ball device is elastically connected with the first shell through vertical springs arranged in the first shell and the second shell; when the spring is compressed, the universal ball device is sunken towards the inner side of the circular through hole of the second shell. The utility model has the advantages that: through the universal ball device of the caster wheel assembly, 360-degree horizontal displacement can be directly realized when the caster wheel needs to move; when the caster wheel receives enough big vertical force, when the spring was compressed, the caster wheel subassembly was sunken to the second casing inboard, and the caster wheel becomes the truckle of fixing from the activity truckle.

Description

Novel caster

Technical Field

The utility model relates to a novel caster wheel which is arranged at the bottom of furniture such as a table, a chair, a bed and a cabinet.

Background

The caster is a general term and comprises a movable caster and a fixed caster. The movable caster wheel is a universal wheel, and the structure of the movable caster wheel allows 360-degree rotation; the fixed caster has no rotating structure and can not rotate. Two types of casters are commonly used, such as a cart having two fixed wheels at the front and two movable casters at the rear adjacent the push arm.

In the prior caster products, when the movable caster needs to be locked, the movement and rotation of the universal wheel are generally limited by using a limiting piece. When the chair is not directly used, the chair often needs to be moved by movable casters, and when the chair is directly used, the chair often needs to be fixed by the casters. Caster structure for switching between temporary movable caster and fixed caster in market

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a novel caster which is realized by the following technical scheme.

A novel caster comprises a shell and a caster component; the caster wheel assembly comprises a first shell fixedly connected with the shell, a second shell in threaded connection with the first shell and provided with a circular through hole, and a universal ball device embedded in the circular through hole of the second shell and protruding out of the second shell; the universal ball device is elastically connected with the first shell through vertical springs arranged in the first shell and the second shell; when the spring is compressed, the second shell can cover the universal ball device along the direction of the spring.

Furthermore, the universal ball device comprises a base with a flange and a mounting hole, and a ball positioned in the mounting hole of the base; a plurality of balls are arranged between the base flange and the round ball.

Further, the inside mounting groove that is provided with of universal ball device, the ball install in the mounting groove, universal ball device includes 3 at least balls.

Further, the second housing of the caster assembly is a circular housing having female threads and the first housing is a circular housing having corresponding male threads.

Further, the shell comprises an upper shell and a lower shell, the upper shell is connected with the first shell of the caster assembly through bolts, and the caster assembly is embedded in the lower shell.

Further, the upper shell has male threads on the upper side and is bolted to the first shell on the lower side.

The utility model has the advantages that: through the universal ball device of the caster wheel assembly, 360-degree horizontal displacement can be directly realized when the caster wheel needs to move; when the caster wheel receives enough big vertical force, when the spring was compressed, the caster wheel subassembly was sunken to the second casing inboard, and the caster wheel becomes the truckle of fixing from the activity truckle.

Drawings

Fig. 1 is a schematic diagram of the explosion structure of the present invention.

Fig. 2 is an exploded view of the caster assembly of the present invention.

Fig. 3 is a schematic view of the combined state structure of the present invention.

Fig. 4 is a sectional view taken along the line a-a in fig. 3.

Fig. 5 is a schematic view of the structure of the spring in the contracted state of the present invention.

Wherein:

1-a housing; 11-upper shell; 12-a lower shell;

2-a caster assembly; 21 — a first housing;

22 — a second housing; 221-circular through hole;

23-a universal ball device; 231-a base; 2311-flange; 2312-mounting holes;

232-round ball; 233-balls;

24-spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A novel caster wheel is shown in figure 1 and comprises a shell 1 and a caster wheel assembly 2; the outer shell 1 comprises an upper shell 11 and a lower shell 12, and the caster wheel assembly 2 is embedded in an inner gap of the lower shell 12 and fixedly connected with the upper shell 11 on the upper surface; lower casing 12 registrates the outside at truckle subassembly 2, and with upper casing 11 separation, in the concrete embodiment, as shown in fig. 3, lower casing 12 adopts the variable cross section structure that changes from top to bottom, and truckle subassembly 2 is agreed with on upper portion, and lower part enclosure truckle subassembly 2, inside is equipped with the draw-in groove corresponding with truckle subassembly 2. The upper side of the upper shell 11 has a male thread protruding for connection with a corresponding chair, bed, preferably a folding chair.

The caster wheel assembly 2 is structurally shown in fig. 2 and comprises a first shell 21, a second shell 22 and a universal ball device 23; the first housing 21 has a bolt hole at an upper side and a male screw protruded at a lower side; the upper side of the second shell 22 is provided with female threads corresponding to the first shell 21, the lower side is provided with a circular through hole 221 with a clamping groove, the lower side of the first shell 21 is in threaded connection with the second shell 22, and the upper side is in bolted connection with the upper shell through a bolt hole. The ball gimbal device is located in an inner space where the first casing 21 and the second casing 22 are connected, is embedded in the circular through hole 221 of the second casing 22, protrudes from the surface of the second casing 22, and is elastically connected to the inner surface of the first casing 21 through the spring 24. Taking the seat as an example, as shown in fig. 4 and 5, the caster using process is explained: the casters are arranged below the seat, in an initial state, the spring 24 is in an extension state, the universal ball device 23 is in contact with the ground, and the casters are movable casters which can directly move; after a person sits on the seat or is stressed in the vertical direction, the spring is in a compressed state, the ball 232 in the universal ball device 2 firstly upwards props against the arc-shaped flange 2311, after the force is continuously applied, the whole universal ball device 23 is sunken towards the inside of the second shell 22, the surface of the second shell 22 is contacted with the ground, and the caster wheel is changed into a fixed caster wheel; when the human body leaves the seat, the spring extends, and the universal ball protrudes outwards to contact the ground. Compared with the prior art, the utility model discloses mainly make the spring compressed through the human body sit, lie, the vertical power of applying seat, bed when sleeping to make the truckle possess movable truckle to the transformation of fixed truckle, the principle is simple, convenient and practical.

The structure of the universal ball device 23 is shown in fig. 4, and the universal ball device 23 is composed of a base with a circular flange 2311 and a mounting hole 2312, and a ball 232 which is embedded in the mounting hole 2312 and is positioned below the circular flange 2311. In the embodiment, the installation hole 2312 is a circular through hole, the radius of the through hole is smaller than that of the round ball 232, the area of the circular arc flange 2311 is larger than that of the hemispherical surface of the round ball 232, and a plurality of balls 233 are additionally arranged between the round ball 232 and the circular arc flange 2311 for increasing the rotation of the round ball 232. Preferably, the number of the balls 233 is 3 or more, and the balls 233 are mounted in the mounting grooves of the circular-arc flange 2311.

The structure of the universal ball device is not limited to the structure shown in the figure, and other common universal ball devices 23 which can meet the requirements can also be applicable to the utility model.

It is last to explain, the utility model discloses a spring need specifically select its model and specification according to the product that supports, and the spring that utilizes must satisfy the weight that will be greater than the product when extending for the truckle can not compressed when being regarded as movable truckle.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel caster is characterized by comprising a shell and a caster component; the caster wheel assembly comprises a first shell fixedly connected with the shell, a second shell in threaded connection with the first shell and provided with a circular through hole, and a universal ball device embedded in the circular through hole of the second shell and protruding out of the second shell; the universal ball device is elastically connected with the first shell through vertical springs arranged in the first shell and the second shell; when the spring is compressed, the universal ball device is sunken towards the inner side of the circular through hole of the second shell.

2. The novel caster wheel of claim 1, wherein said ball-and-socket device comprises a base having a flange and a mounting hole, a ball located in the mounting hole of the base; a plurality of balls are arranged between the base flange and the round ball.

3. The novel caster wheel according to claim 2, wherein said ball transfer device is internally provided with a mounting groove, said balls being mounted in said mounting groove, the ball transfer device comprising at least 3 balls.

4. The novel caster wheel of claim 3, wherein said second housing of said caster wheel assembly is a female threaded circular housing and said first housing is a corresponding male threaded circular housing.

5. The novel caster of claim 4, wherein said outer shell comprises an upper shell and a lower shell, said upper shell being bolted to a caster assembly first housing, said caster assembly fitting inside said lower shell.

6. The novel caster wheel of claim 5, wherein said upper shell has male threads on an upper side and a lower side bolted to the first housing.