CN220615380U - Caster for suitcase - Google Patents

Abstract

The utility model provides a travel case caster, which includes a fixed seat fixed at the bottom of the travel case, a wheel seat arranged below the fixed seat, a roller rotatably connected to the wheel seat, and a vertical shaft axially connecting the fixed seat and the wheel seat. , a lower mounting part extends downward from the bottom of the fixed base, and an upper mounting part extends upward from the top of the wheel base. The upper mounting part and the lower mounting part are inserted and positioned in and out of each other, and a cylindrical installation is formed in the inner areas of the two. In the cavity, a limiter table extends outward from the middle part of the vertical shaft. The limiter table is located in the installation cavity. A plane bearing is provided below the limiter table. The top and bottom surfaces of the plane bearing are respectively close to the bottom surface of the limiter table and the wheel. The top surface of the seat ensures that the wheel seat can rotate freely 360° relative to the vertical axis under the transmission of the plane bearing. The utility model has good structural strength, can withstand greater pressure, has good rotation effect, good shock absorption effect, and is not easy to be damaged.

Description

A suitcase caster

Technical field

The utility model relates to a suitcase assembly, in particular to a suitcase caster.

Background technique

Luggage is an indispensable tool for people to carry items on long journeys, especially suitcases with casters, which allow people to easily carry their luggage to various places on the journey by gently dragging the suitcase's trolley. . Although casters are the key factor that makes the suitcase so convenient to carry, however, since the wheel body of the caster has to bear the weight of the entire suitcase and may roll over many ups and downs and rugged ground, the wheel body of the caster is also The most vulnerable part of your luggage.

Existing casters for suitcases include rollers, wheel seats for the rollers to rotate, and fixed seats for connecting the wheel seats and being fixedly connected to the suitcase. The fixed base of the caster is fixed to the suitcase by passing a number of screws from the inside of the suitcase to the fixed base outside the suitcase to fix the suitcase and the fixed base together. The connection structure between the wheel base and the fixed base generally has two types: fixed connection and rotary connection. The rotary connection generally uses a hinged method to achieve free rotation. When encountering uneven roadside during use, sometimes the rollers will temporarily If it is stuck, it cannot rotate freely, and it is easier to be damaged due to the high pressure on the connection.

Utility model content

In view of the above problems, the present utility model aims to provide a suitcase caster, which has good structural strength, can withstand greater pressure, has good rotation effect, good shock absorption effect, and is not easy to be damaged.

The technical solution of the present invention is a suitcase caster, which includes a fixed seat fixed at the bottom of the suitcase, a wheel seat arranged below the fixed seat, a roller rotatably connected to the wheel seat, an axially connected fixed seat and the wheel seat. A vertical shaft, a lower mounting part extends downward from the bottom of the fixed seat, and an upper mounting part extends upward from the top of the wheel seat. The upper mounting part and the lower mounting part are inserted and positioned inside and outside each other and form a cylindrical shape in the inner areas of the two. The installation cavity has a limit platform extending outward from the middle part of the vertical shaft. The limit platform is located in the installation cavity. A plane bearing is provided below the limit platform. The top and bottom surfaces of the plane bearing are respectively close to the bottom surface of the limit platform. and the top surface of the wheel seat to ensure that the wheel seat can rotate freely 360° relative to the vertical axis under the transmission of the plane bearing.

Preferably, a shock-absorbing spring is provided above the limiting platform. The upper and lower ends of the shock-absorbing spring are respectively pressed into contact with the fixed seat and the limiting platform. Under the elastic force of the shock-absorbing spring, the bottom surface of the limiting platform fits and compresses the plane bearing. top surface.

Preferably, the top of the vertical shaft passes through the fixed base and is flanged outwards and is riveted or welded to the top surface of the fixed base or connected to the top surface of the fixed base through a connector.

Preferably, an annular groove is provided on the bottom surface of the vertical shaft, and a positioning pin is disposed transversely in the wheel base. The positioning pin passes through the annular groove and is fixed in the wheel base to limit the vertical shaft axially.

Preferably, the plane bearing is a plane needle roller bearing or a plane ball bearing.

Preferably, rollers are hingedly connected to the left and right sides of the wheel base.

The utility model is provided with a plane bearing between the wheel seat and the vertical shaft, and a shock-absorbing spring between the fixed seat and the vertical shaft, so that the caster of this structure can withstand greater pressure, has good structural strength, good rotation effect, and is not easily damaged.

Description of the drawings

Figure 1 is a schematic structural diagram of the utility model;

Figure 2 is a front view of the utility model;

Figure 3 is a structural cross-sectional view without a shock absorbing spring along the A-A direction of Figure 2;

Figure 4 is a structural cross-sectional view with a shock-absorbing spring along the A-A direction of Figure 2;

Figure 5 is a schematic diagram of the connection structure of the roller, wheel seat and vertical shaft in the utility model;

Among them: 1-fixed seat; 11-lower mounting part; 2-wheel seat; 21-upper mounting part; 3-roller; 4-vertical shaft; 41-limiting table; 42-annular groove; 5-installation cavity; 6 —Shock absorbing spring; 7—Plane bearing; 8—Connecting piece.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 5, the utility model provides a travel case caster, which includes a fixed base 1 fixed at the bottom of the suitcase, a wheel base 2 provided below the fixed base 1, and a wheel base 2 rotatably connected to the wheel base 2. The roller 3, the vertical shaft 4 that axially connects the fixed base 1 and the wheel base 2, the bottom of the fixed base 1 extends downwards from the lower mounting part 11, the top of the wheel base 2 extends upward from the upper mounting part 21, the upper The mounting part 21 and the lower mounting part 11 are inserted into and positioned inside and outside each other and form a cylindrical mounting cavity 5 in their internal areas. A limiting platform 41 extends outward from the middle of the vertical shaft 4. The limiting platform 41 is located in the mounting cavity. In the cavity 5, a plane bearing 7 is provided below the limiting platform 41. The top and bottom surfaces of the plane bearing 7 are respectively close to the bottom surface of the limiting platform 41 and the top surface of the wheel base 2 to ensure the transmission of the wheel base 2 relative to the vertical shaft 4 in the plane bearing 7 360° free rotation.

On the basis of the above solution, as shown in Figure 4, a damping spring 6 is provided above the limiting platform 41. The upper and lower ends of the damping spring 6 respectively press and contact the fixed seat 1 and the limiting platform 41. Under the elastic force of 6, the bottom surface of the limiter 41 fits and presses the top surface of the plane bearing 7.

Specifically, the top of the vertical shaft 4 passes through the fixed base 1 and then is flanged outwards and is riveted to the top surface of the fixed base 1 or welded to the top surface of the fixed base 1 or connected to the top surface of the fixed base 1 through the connector 8 .

In addition, an annular groove 42 is provided on the bottom surface of the vertical shaft 4, and a positioning pin is provided transversely in the wheel base 2. The positioning pin passes through the annular groove 42 and is fixed in the wheel base 2 to limit the axial direction of the vertical shaft 4. Bit.

In addition, the plane bearing 7 is a plane needle roller bearing or a plane ball bearing.

Furthermore, rollers 3 are hingedly connected to the left and right sides of the wheel base 2 .

The utility model connects the fixed seat 1 and the wheel seat 2 into an integrated structure through the vertical shaft 4. The upper part of the limiting platform 41 in the middle of the vertical shaft 4 realizes the shock absorption of the entire structure through the shock absorbing spring 6 and urges the vertical shaft 4 to press the plane bearing 7 downward. At this time, the lower race of the plane bearing is close to the wheel seat 2. The upper and lower races can rotate relatively freely under the action of the cage and rolling elements in the middle, thereby realizing the freedom of the wheel seat 2 relative to the vertical shaft 4. Rotate to achieve 360° free rotation of the roller 3 relative to the suitcase. At the same time, when pushing on a rough road, the shock-absorbing spring 6 moves up and down under force, which can effectively absorb shock.

The above are only preferred embodiments of the present utility model and do not impose any formal restrictions on the utility model. Any simple modifications, equivalent changes or modifications made to the above embodiments based on the technical principles of the present utility model can be made. It still falls within the scope of the technical solution of the present invention.

Claims (6)

1. The utility model provides a suitcase truckle, includes fixing base (1) at suitcase bottom, sets up wheel seat (2) in fixing base (1) below, rotatable gyro wheel (3) of connecting on wheel seat (2), axial connection fixing base (1) and vertical scroll (4) of wheel seat (2), its characterized in that: the utility model discloses a wheel seat, including fixing base (1), wheel seat (2), fixing base (1), upper mounting portion (21), lower mounting portion (11), upper mounting portion (21) and lower mounting portion (11) are inserted the location each other and are formed tubular installation appearance chamber (5) in both inside regions down, spacing platform (41) are outwards extended in vertical scroll (4) middle part, spacing platform (41) are located An Zhuangrong chamber (5), are provided with plane bearing (7) below spacing platform (41), and plane bearing (7) top surface and bottom surface are hugged closely spacing platform (41) bottom surface and wheel seat (2) top surface respectively, ensure 360 free rotations of relative vertical scroll (4) of wheel seat (2) under the transmission of plane bearing (7).

2. A suitcase castor as claimed in claim 1, wherein: and a damping spring (6) is arranged above the limiting table (41), the upper end and the lower end of the damping spring (6) are respectively in extrusion contact with the fixed seat (1) and the limiting table (41), and the bottom surface of the limiting table (41) is attached to and tightly presses the top surface of the plane bearing (7) under the action of the elasticity of the damping spring (6).

3. A suitcase castor as claimed in claim 1, wherein: the top of the vertical shaft (4) passes through the fixed seat (1) and then is outwards turned and riveted on the top surface of the fixed seat (1), or is welded on the top surface of the fixed seat (1) or is connected on the top surface of the fixed seat (1) through a connecting piece (8).

4. A suitcase castor as claimed in claim 1, wherein: an annular groove (42) is formed in the bottom surface of the vertical shaft (4), a positioning pin is transversely arranged in the wheel seat (2), and the positioning pin penetrates through the annular groove (42) and is fixed in the wheel seat (2) and axially limits the vertical shaft (4).

5. A suitcase castor as claimed in claim 1, wherein: the plane bearing (7) is a plane needle bearing or a plane ball bearing.

6. A suitcase castor as claimed in claim 1, wherein: the left side and the right side of the wheel seat (2) are hinged with idler wheels (3).