CN215826388U - Shock-proof caster - Google Patents

Abstract

The utility model relates to the technical field of casters, in particular to a shock-absorbing caster which comprises a caster body, a tubular elastic part, a vertical fixed seat and a horizontally arranged rotating seat, wherein one end of the rotating seat is rotatably connected with the lower end of the fixed seat through a first rotating connecting part, the other end of the rotating seat is fixedly provided with a first supporting column, the upper end of the fixed seat is fixedly provided with a second supporting column, the first supporting column and the second supporting column extend in opposite directions, the maximum distance between the first supporting column and the second supporting column is smaller than the maximum stroke of the tubular elastic part which can be compressed, the tubular elastic part is sleeved on the periphery of the first supporting column and the second supporting column, two ends of the tubular elastic part respectively abut against the fixed seat and the rotating seat, and the caster body is rotatably arranged on the rotating seat. When first support column and second support column pass through the terminal surface and accomplish to support each other and lean on, fixing base, roating seat and the first support column and the second support column that support each other and support and form a stable and higher triangular structure of intensity, guarantee the truckle of moving away to avoid possible earthquakes can not be destroyed by external force.

Description

Shock-proof caster

Technical Field

The utility model relates to the technical field of casters, in particular to a shock-absorbing caster.

Background

The general truckle is installed in the bottom of equipment according to forming mobile device, conveniently removes, and the wheel body and the ground of truckle form the point contact to it is comparatively laborsaving during manpower propelling movement equipment, be very convenient and practical's component, it extensively applies to equipment such as seat, suitcase, sick bed, cupboard, transport platform truck, shallow. The conventional caster has no shock absorbing function, and if the conventional caster is mounted on the seat, the conventional caster is easily bumpy due to the influence of the flatness of the ground when moving, so that discomfort of a user is caused. Therefore, there are casters with shock absorbing devices on the market, such as a shock absorbing roller assembly for luggage disclosed in chinese patent application No. CN201620400283.3, which includes a roller, upper and lower axle bodies, a spring, a horizontal shaft, a pivot seat inclined with respect to the upper and lower axle bodies, and a connecting seat mounted on the luggage, wherein the upper and lower axle bodies are assembled on the connecting seat; the first end of the pivot seat is in scarf joint with the upper and lower shaft bodies, the horizontal shaft penetrates through the scarf joint parts of the pivot seat and the upper and lower shaft bodies, the pivot seat swings around the horizontal shaft relative to the upper and lower shaft bodies, and the upper and lower shaft bodies are provided with a first blocking part and a second blocking part which limit the range of the pivot seat swinging around the horizontal shaft; the spring is elastically abutted between the upper shaft body and the lower shaft body and the pivoting seat, the spring constantly drives the pivoting seat to pivot to a position abutted against the first blocking part, the mounting shaft penetrates through the second end of the pivoting seat along the axial direction of the horizontal shaft, and the roller is mounted on the mounting shaft; when the roller rolls on the ground to generate vibration, the vibrating roller compresses the spring to make the pivot seat swing towards the position close to the second stopping part, thereby playing the role of shock absorption. However, when the shock absorbing function is performed, the angle range of the pivot seat capable of performing pivot swinging around the horizontal axis is the angle between the first blocking portion and the second blocking portion, when the maximum shock absorbing degree is reached, the pivot seat abuts against the second blocking portion, the spring still has a margin capable of being compressed, because the first blocking portion and the second blocking portion are located near the pivot connection position of the pivot seat and the upper and lower shaft bodies in the actual structure, namely the force bearing point is too close to the rotation center, the interaction force between the pivot seat and the second blocking portion is large, the second blocking portion is difficult to perform a good blocking function on the pivot seat, the first sleeving column and the second sleeving column are only used for the spring sleeving, when the pivot seat abuts against the second blocking portion, the first sleeving column and the second sleeving column are not abutted against each other to realize the blocking of the pivot seat, therefore once the pivot seat reaches the maximum pivot swinging angle, the pivot seat still has a large force to drive the pivot swinging to continue, the overall structure is easily damaged, and thus the shock-absorbing roller assembly of the patent has low reliability.

SUMMERY OF THE UTILITY MODEL

The utility model improves the technical problem, namely, the technical scheme provided by the utility model is a shock-absorbing caster which comprises a wheel body, a tubular elastic part, a vertical fixed seat and a horizontally arranged rotary seat, wherein one end of the rotary seat is rotationally connected with the lower end of the fixed seat through a first rotational connecting part, the other end of the rotary seat is fixedly provided with a first supporting column, the upper end of the fixed seat is fixedly provided with a second supporting column, the first supporting column and the second supporting column extend oppositely, the maximum distance between the first supporting column and the second supporting column is smaller than the maximum distance which can be compressed by the tubular elastic part, the tubular elastic part is sleeved on the peripheries of the first supporting column and the second supporting column, the two ends of the tubular elastic part respectively abut against the fixed seat and the rotary seat, and the wheel body is rotationally arranged on the rotary seat.

In the present invention, it is preferable that the end surface of the first support column and the end surface of the second support column are both inclined planes, and that the end surfaces of the first support column and the second support column can be completely attached to each other when the end surfaces abut against each other.

In a preferred aspect of the present invention, the rotary base has a first protruding portion having a first support surface to which the first support column is fixed, and the first support column is parallel to an end surface of the first support column.

Preferably, the fixing base has a second protruding portion, the second protruding portion has a second supporting surface for fixing the second supporting column, and the second supporting surface is parallel to an end surface of the second supporting column.

Preferably, the tubular elastic member is abutted against the first support surface at one end and the second support surface at the other end.

Preferably, the first support column and the second support column are both cross-shaped columns.

Preferably, a first magnetic layer is laid on an end face of the first support column, a second magnetic layer is laid on an end face of the second support column, and polarities of the first magnetic layer and the second magnetic layer are opposite.

Preferably, four second grooves extending in the axial direction of the second support column are formed in the periphery of the second support column, at least one of the second grooves is provided with a guide rod extending in the axial direction of the second support column, and the guide rod extends from the second support surface to a region between the first support column and the second support column.

Preferably, each of the second strip-shaped grooves is provided with the guide rod.

Preferably, the rotating base is hollow and provided with a reinforcing rib.

Has the advantages that:

first support column with the maximum interval between the second support column is greater than the maximum stroke that tubular elastic component can be compressed, consequently when first support column and second support column pass through the terminal surface and accomplish each other and support and lean on when leaning on, just mean to move away to avoid possible earthquakes the truckle reaches maximum moving away to avoid possible earthquakes, this moment fixing base, roating seat and the first support column and the second support column that support to support each other form a stable and the higher triangular structure of intensity, if still great external force orders about the roating seat continues the square rotation, then first support column and second support column can fully maintain the stable state of truckle of moving away to avoid possible earthquakes guarantees the truckle of moving away to avoid possible earthquakes can not destroyed by external force.

Drawings

FIG. 1 is a schematic view of a shock-absorbing caster according to the present invention;

FIG. 2 is a schematic structural view of the fixing base;

FIG. 3 is a schematic structural view of the rotary base;

FIG. 4 is a schematic view of the position relationship between the first support column and its end face and the second support column and its end face;

fig. 5 is a schematic view of the first magnetic layer, the second magnetic layer, and the guide bar;

in the figure: 1. the rotary seat, 11, first extension, 12, first holding surface, 2, fixing base, 21, second extension, 22, second holding surface, 3, tubular elastic component, 4, wheel body, 5, first rotation connecting portion, 61, first support column, 62, second support column, 71, first magnetic layer, 72, second magnetic layer, 81, first bar-shaped groove, 82, second bar-shaped groove, 9, guide bar.

Detailed Description

The following specific examples are given by way of illustration only and not by way of limitation, and it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made in the examples without inventive faculty, and yet still be protected by the scope of the claims.

Fig. 1 shows a shock-absorbing caster of the present invention, which comprises a wheel body 4, a tubular elastic member 3, a vertical fixed seat 2 and a horizontally arranged rotating seat 1, wherein one end of the rotating seat 1 is rotatably connected to the lower end of the fixed seat 2 through a first rotating connection portion 5, the other end of the rotating seat 1 is fixed with a first support column 61, the upper end of the fixed seat 2 is fixed with a second support column 62, the first support column 61 and the second support column 62 extend in opposite directions, the maximum distance between the two support columns is smaller than the maximum distance that the tubular elastic member 3 can be compressed, the tubular elastic member is sleeved on the peripheries of the first support column and the second support column, and the two ends of the tubular elastic member 3 respectively abut against the fixed seat 2 and the rotating seat 1, such that the tubular elastic member 3, the fixed seat 2 and the rotating seat 1 form a triangular structure, the wheel body is rotatably arranged on the rotating seat 1. When the shock-absorbing caster wheel is used, the shock-absorbing caster wheel is installed on furniture or equipment such as a seat through the fixed seat 2, so the fixed seat 2 is always in an upright state and can be regarded as a rack, once the wheel body encounters a bumping condition in the process of traveling on the ground, the rotating seat 1 rotates upwards around the first rotating connecting part 5, at the moment, the first supporting column 61 moves towards the second supporting column 62, and meanwhile, the tubular elastic part 3 is compressed to play a role in buffering and shock absorption. In the shock-absorbing caster of the present invention, the maximum distance between the first supporting column 61 and the second supporting column 62 is greater than the maximum distance that the tubular elastic member 3 can be compressed, so when the first supporting column 61 and the second supporting column 62 are abutted against each other through the end surfaces, it means that the shock-absorbing caster achieves maximum shock absorption, and at this time, the fixed seat 2, the rotating seat 1, and the abutted first supporting column 61 and the abutted second supporting column 62 form a stable and high-strength triangular structure, and if a large external force is still present to drive the rotating seat 1 to continue to rotate upward, the first supporting column 61 and the second supporting column 62 can fully maintain the stable state of the shock-absorbing caster, thereby ensuring that the shock-absorbing caster cannot be damaged by the external force. Of course, in the prior art, a structure for limiting the rotation range of the rotating seat 1 may be disposed at the rotation connection between the rotating seat 1 and the fixing seat 2, so as to play an auxiliary supporting role, and in specific implementation, two blocking portions for limiting the rotation range of the rotating seat are disposed on the fixing seat 2.

As can be seen from the above, the first supporting column 61 and the second supporting column 62 are disposed opposite to each other and have end surfaces capable of abutting against each other, so that the end surfaces of the two supporting columns face each other, and fig. 4 shows that the two end surfaces are both integrally inclined and have a side edge close to the first rotation connecting portion 5 lower than a side edge far from the first rotation connecting portion 5. When the tubular elastic element 3 is in an uncompressed state in the initial state of the shock-absorbing caster of the present invention, and the first support column 61 and the second support column 62 are in a maximum shock-absorbing state, since the first support column 61 rotates along with the rotating base 1 and the rotating base 1 rotates around the first rotating connection part 5, the orientation of the end surface of the first support column 61 changes during the rotation process, and when the first support column 61 and the second support column 62 abut against each other, if the inclination degrees of the end surfaces of the two support columns are different, only a part of the two end surfaces abut against each other, and the support strength is poor. The preferred terminal surface of first support column 61 and the terminal surface of second support column 62 all are the plane that is the slope form in this embodiment to the terminal surface of first support column 61 with the terminal surface of second support column 62 leans on when both can laminate completely each other, can make the intensity that first support column 61 and second support column 62 supported each other obtain guaranteeing like this. To achieve the above purpose, fig. 4 shows that in the initial state of the present embodiment, the acute angle between the end surface of the first support column 61 and the horizontal plane is smaller than the acute angle between the end surface of the second support column 62 and the horizontal plane, that is, the inclination degrees of the two end surfaces are different in the initial state, when the first support column 61 rotates around the first rotating connection portion 5 following the rotating base 1, the acute angle between the end surface of the first support column 61 and the horizontal plane gradually increases, in this process, the orientation of the end surface of the first support column 61 will gradually face the end surface of the second support column 62, until the first support column 61 abuts against the second support column 62 through the two end surfaces, the end surface of the first support column 61 completely faces the end surface of the second support column 62 and completely abuts against the end surface of the second support column 62. When the first support post 61 is specifically machined, the specific inclination degree of the end surface of the first support post needs to be obtained through rotation experiments and angle calculation.

Work as first support column 61 supports when supporting with second support column 62 each other, and first support column 61 and second support column 62 all receive along self axial effort to first support column 61 transmits the aforesaid for roating seat 1 along self axial power, and second support column 62 transmits the aforesaid for fixing base 2 along self axial power, because first support column 61 and second support column 62 are the slope form, and roating seat 1 is horizontal setting, and fixing base 2 is the setting of upright form, so connection structure between roating seat 1 and first support column 61 and connection structure between fixing base 2 and the second support column 62 all are unfavorable for the atress, result in the holistic intensity of shockproof truckle is not enough with the reliability. Therefore, in this embodiment, it is preferable that the rotating base 1 has a first protruding portion 11, the first protruding portion 11 has a first supporting surface 12 for fixing the first supporting column 61, and the first supporting surface 12 is parallel to the end surface of the first supporting column 61, so that the first supporting surface 12 is perpendicular to the acting force transmitted by the first supporting column 61 along the axial direction thereof, the bearing capacity of the first supporting surface 12 on the acting force is significantly improved, and the strength of the whole shock-absorbing caster is improved; similarly, in this embodiment, it is preferable that the fixing base 2 has a second protruding portion 21, the second protruding portion 21 has a second supporting surface 22 for fixing the second supporting column 62, and the second supporting surface 22 is parallel to the end surface of the second supporting column 62, so that the second supporting surface 22 is perpendicular to the acting force transmitted by the second supporting column 62 along the axial direction thereof, the bearing capacity of the second supporting surface 22 for the acting force is significantly improved, and the strength of the shock-absorbing caster is improved.

In this embodiment, after the first supporting column 61 is disposed on the first supporting surface 12, a part of the first supporting surface 12 around the first supporting column 61 is vacant; after the second supporting column 62 is arranged on the second supporting surface 22, a part of the second supporting surface 22 around the second supporting column 62 is vacant; in this embodiment, the tubular elastic element 3 is sleeved on the peripheries of the first supporting column 61 and the second supporting column 62, in order to ensure that the tubular elastic element 3 does not loose, the size of the inner ring of the tubular elastic element 3 is substantially consistent with the size of the outer ring of the first supporting column 61 and the second supporting column 62, the tubular elastic element 3 can hoop the first supporting column 61 and the second supporting column 62, so that one end of the tubular elastic element 3 can abut against the void of the first resting surface 12 and the other end can abut against the void of the second resting surface 22, when the rotary seat 1 rotates, the compression of the tubular elastic element 3 is realized by the extrusion of the first supporting surface 12 and the second supporting surface 22, and the first supporting surface 12 and the second supporting surface 22 are both approximately perpendicular to the axial direction of the tubular elastic element 3, so that the stress at the two ends is uniform and balanced when the tubular elastic element 3 is compressed, and the shock-absorbing effect of the shock-absorbing caster wheel is prevented from being influenced by the distortion of the tubular elastic element 3. Further improve, this embodiment is preferred first support column 61 with second support column 62 all is the cross cylinder, has improved the effect of cramping between first support column 61 and second support column 62 and the tubulose elastic component 3 to improve the stability of tubulose elastic component 3, first support column 61 and second support column 62 have also obtained the lightweight processing simultaneously, have both saved material cost, have still reduced the weight of truckle of moving away to avoid possible earthquakes reduces cost of transportation. In addition, the cross-shaped column body is not provided with a weak shaft, the failure mode of the cross-shaped column body belongs to the plastic failure of local buckling, and the plastic deformation mainly occurs on the flange of the bending moment acting plane, so that the bending bearing capacity and the anti-seismic bearing capacity of the cross-shaped column body are better, and the cross-shaped column body also has a good transmission effect on axial loads.

According to the shock-absorbing caster wheel, the rotating seat 1 rotates around the first rotating connecting part 5 to compress the tubular elastic part 3 to play a shock-absorbing role, when the maximum shock-absorbing effect is achieved, the first supporting column 61 abuts against the second supporting column 62, at the moment of abutting, the tubular elastic part 3 is difficult to play a shock-absorbing role, and the first supporting column 61 and the second supporting column 62 abut against each other along with violent impact, so that the shock-absorbing caster wheel generates violent trembling, and the shock-absorbing effect of the shock-absorbing caster wheel is greatly influenced. To above-mentioned problem, this embodiment is preferred first magnetic layer 71 is paved on the terminal surface of first support column 61, second magnetic layer 72 is paved on the terminal surface of second support column 62, first magnetic layer 71 with the polarity on second magnetic layer 72 is opposite, just so makes first support column 61 and second support column 62 can obtain the buffering of the effort of mutual repulsion between first magnetic layer 71 and the second magnetic layer 72 when being close to the counterbalance to effectively reduce the collision severity when first support column 61 and second support column 62 counterbalance, thereby improve the shockproof effect of shockproof truckle.

As the first magnetic layer 71 and the second magnetic layer 72 approach each other, the mutual repulsive force between the two layers increases, and particularly when the first support pillar 61 and the second support pillar 62 are about to abut against each other through the first magnetic layer 71 and the second magnetic layer 72, the first magnetic layer 71 and the second magnetic layer 72 may be shifted by the repulsive force, so that the first support pillar 61 and the second support pillar 62 cannot be aligned against each other, and the tubular elastic member 3 may be twisted and the first rotation connection portion 5 may be damaged. In this embodiment, the first supporting column 61 and the second supporting column 62 are both cross-shaped cylinders, and therefore the peripheries of the first supporting column 61 and the second supporting column 62 are both formed with four strip-shaped grooves extending along the respective axial directions, wherein the periphery of the first supporting column 61 is a first strip-shaped groove 81, the periphery of the second supporting column 62 is a second strip-shaped groove 82, and when the cross-shaped end surface of the first supporting column 61 and the cross-shaped end surface of the second supporting column 62 are correspondingly abutted, the four first strip-shaped grooves 81 and the four second strip-shaped grooves 82 are also aligned one by one. In this embodiment, a guiding rod 9 extending along the axial direction of the second supporting column 62 is preferably disposed in at least one of the second strip-shaped grooves 82, and the guiding rod 9 extends from the second supporting surface 22 to the area between the first supporting column 61 and the second supporting column 62, so that after the first supporting column 61 travels a distance towards the second supporting column 62, the guiding rod 9 extends into one of the first strip-shaped grooves 81, so that the first supporting column 61 can travel along the guiding rod 9, and the travel route of the first supporting column 61 is prevented from being deviated. Further improve, preferably every all be provided with guide bar 9 in the second bar groove 82, four guide bar 9 just form one like this and can all cramp first support column 61 and second support column 62 and the higher guide rail of intensity, can further guarantee that first support column 61 advances towards second support column 62 all the time to guarantee the effect of moving away to avoid possible earthquakes of truckle.

The improved structure is further improved, the rotating base 1 is preferably hollowed and provided with reinforcing ribs, and the hollowed inside the rotating base 1 belongs to light weight treatment, so that the material cost is saved, the overall weight of the shock-absorbing caster is reduced, and the transportation cost is reduced; and the strength of the rotary seat 1 is ensured by arranging reinforcing ribs inside the rotary seat. In this embodiment, the rotating base 1, the first extending portion 11 and the first supporting column 61 are integrally formed, the fixing base 2, the second extending portion 21 and the second supporting column 62 are integrally formed, the tubular elastic member 3 is preferably a compression spring, and the first rotating connecting portion 5 is a pivot structure.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The shock-absorbing caster is characterized by comprising a wheel body (4), a tubular elastic part (3), a vertical fixed seat (2) and a horizontally arranged rotary seat (1), wherein one end of the rotary seat (1) is rotatably connected with the lower end of the fixed seat (2) through a first rotating connecting part (5), a first supporting column (61) is fixed at the other end of the rotary seat (1), a second supporting column (62) is fixed at the upper end of the fixed seat (2), the first supporting column (61) and the second supporting column (62) extend in opposite directions, the maximum distance between the first supporting column and the second supporting column is smaller than the maximum stroke of the tubular elastic part (3) which can be compressed, the tubular elastic part (3) is sleeved on the peripheries of the first supporting column (61) and the second supporting column (62), and the two ends of the tubular elastic part (3) are respectively abutted against the fixed seat (2) and the rotary seat (1), the wheel body (4) is rotatably arranged on the rotating seat (1).

2. The shock-absorbing caster according to claim 1, wherein the end surface of the first supporting column (61) and the end surface of the second supporting column (62) are both inclined planes, and the end surfaces of the first supporting column (61) and the second supporting column (62) can be completely attached to each other when abutting against each other.

3. A shock-absorbing castor according to claim 2, wherein said rotating base (1) has a first protruding portion (11), said first protruding portion (11) has a first supporting surface (12) for fixing said first supporting post (61), said first supporting surface (12) is parallel to the end surface of said first supporting post (61).

4. A shock-absorbing castor according to claim 3, wherein said fixed seat (2) has a second protruding portion (21), said second protruding portion (21) has a second supporting surface (22) for fixing said second supporting column (62), said second supporting surface (22) is parallel to the end surface of said second supporting column (62).

5. A shock-absorbing castor according to claim 4, wherein said tubular elastic member (3) is in abutment with said first support surface (12) at one end and with said second support surface (22) at the other end.

6. A shock-absorbing castor according to claim 5, wherein said first supporting column (61) and said second supporting column (62) are both cross-shaped cylinders.

7. The shock-absorbing caster wheel as claimed in claim 6, wherein a first magnetic layer (71) is laid on the end surface of the first supporting column (61), a second magnetic layer (72) is laid on the end surface of the second supporting column (62), and the polarities of the first magnetic layer (71) and the second magnetic layer (72) are opposite.

8. A shock-absorbing castor according to claim 7, wherein four second strip-shaped grooves (82) axially extending along said second supporting column (62) are formed on the periphery of said second supporting column (62), at least one of said second strip-shaped grooves (82) is provided with a guide rod (9) axially extending along said second supporting column (62), said guide rod (9) extends from said second supporting surface (22) to the area between said first supporting column (61) and said second supporting column (62).

9. A shock-absorbing castor according to claim 8, wherein said guide bar (9) is arranged in each of said second grooves (82).

10. The shock-absorbing caster according to claim 9, wherein the rotating base (1) is hollow and provided with reinforcing ribs.

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