CN211730928U - Roller mechanism and equipment thereof - Google Patents

Abstract

The application discloses a roller mechanism and equipment thereof, the roller mechanism comprises a seat body, a roller component and an elastic mechanism, the roller assembly comprises a roller bracket and a roller, the roller is rotatably arranged on the roller bracket, the elastic mechanism comprises an elastic component and an adjusting component, the roller component is fixed with the seat body, the elastic component is pressed between the roller component and the seat body, the roller component can move up and down relative to the seat body, the seat body is provided with a braking part, when the seat body is not pressed downwards, the braking part is far away from the ground, the roller mechanism can move along with the rolling of the roller, when the seat body is pressed downwards, the braking part is supported on the ground, the roller mechanism can not move, the adjusting component is arranged on the base body and linked with the elastic component, and can realize the adjustment of the applying pressure of the elastic component in the initial state.

Description

Roller mechanism and equipment thereof

Technical Field

The present application relates to a roller mechanism and an apparatus thereof.

Background

The universal wheel is widely applied to various industries and fields such as mines, mechanical equipment, electronic equipment, medical equipment, engineering decoration, textile, printing and dyeing, furniture, logistics equipment, storage, turnover vehicles, cabinets, equipment, electromechanics, dust-free workshops, production lines, large supermarkets, baby carriages, toys and the like. The universal wheel refers to a bracket which is arranged on a caster wheel and can horizontally rotate for 360 degrees in dynamic load or static load. The truckle includes activity truckle and truckle, and truckle does not have revolution mechanic, can not the horizontal rotation only can rotate perpendicularly, and these two kinds of truckles generally all are collocation usefulness.

However, in some special use occasions, the universal wheel needs to have a braking function under certain conditions and a rotating function under certain conditions. For example, a dining chair for children to eat needs to be kept non-slidable when the children sit on the dining chair for safety; but the infant is required to be slidable for easy transportation when not sitting on the dining chair.

For another example, a shopping cart used in a supermarket needs to be pushed on a flat ground, but cannot be pushed on an inclined plane with a certain angle (such as an inclined escalator).

The conventional universal wheel or fixed wheel cannot meet the use requirement.

SUMMERY OF THE UTILITY MODEL

The application aims at providing a roller mechanism and equipment thereof.

In order to achieve the purpose, the following design scheme is adopted in the application:

the roller mechanism comprises a seat body, a roller assembly and an elastic mechanism, wherein the roller assembly comprises a roller support and a roller, the roller is rotatably installed on the roller support, the elastic mechanism comprises an elastic component and an adjusting component, the roller assembly is fixed with the seat body, the elastic component is arranged between the roller assembly and the seat body in a pressurizing mode, the roller assembly can move up and down relative to the seat body, a braking portion is formed on the seat body, when the seat body is not pressed downwards, the braking portion is far away from the ground, the roller mechanism can move along with the roller in a rolling mode, when the seat body is pressed downwards, the braking portion is supported on the ground, the roller mechanism cannot move, the adjusting component is installed on the seat body and is linked with the elastic component, and the adjusting component can adjust the pressurizing size of the elastic component in an initial state.

Further, the roller bracket is formed with an installation shaft, the base body is formed with a displacement hole matched with the installation shaft, and the installation shaft is matched and accommodated in the displacement hole and can move in the displacement hole along the up-down direction.

Further, the elastic member is a compression spring, one end of the elastic member is arranged on the roller assembly, and the other end of the elastic member is arranged on the adjusting member.

Further, the adjusting member is a screw with threads, the adjusting member is in threaded connection with the base body, and the adjusting member can rotate and move in the up-and-down direction.

Further, the seat body comprises a supporting seat and an installation seat fixed with the supporting seat, the supporting seat is provided with a limiting part and a braking part, the displacement hole penetrates through the installation seat, the limiting part is located above the installation seat, the elastic component is located between the limiting part and the installation seat, and the adjusting component is installed on the limiting part.

Furthermore, the periphery of the part of the upper end of the mounting shaft, which penetrates through the displacement hole and protrudes out of the upper end face of the mounting seat, is sunken to form an annular limiting groove, and the roller mechanism further comprises a limiting member which is sleeved on the limiting groove.

Further, the roller support comprises a support main body and an installation shaft formed by upward extending of the support main body, the axis position of the roller is pivoted with one side of the support main body, the roller assembly further comprises a swing arm portion, the swing arm portion is pivoted to the support main body, the lower end of the swing arm portion can swing relative to the support main body, and when the swing arm portion swings to an angle relative to the support main body, the lower end position of the swing arm portion brakes the roller.

Furthermore, a plurality of stopping portions arranged at intervals are formed on the inner groove wall of the swing arm groove in a protruding mode, when the swing arm swings to an angle relative to the support main body, the lower end position of the swing arm portion is matched with the stopping portions to achieve braking, a stopping groove is formed between any two adjacent stopping portions, the end portion of the swing arm portion abuts against the stopping groove and is matched with the stopping portions to achieve abutting braking, in the axial direction of the roller, the pivoting position of the swing arm portion and the support main body is not overlapped with the axis of the roller, and in the up-down direction, the pivoting position of the swing arm portion and the support main body is not located right below the axis.

Further, swing arm portion lower extreme edge becomes the design of closed angle form and forms closed angle portion, it is the cockscomb structure to end the position portion, end the position portion end edge also becomes closed angle form and forms closed angle head, swing arm portion upper end position forms the slope form and ends the position face, it can contradict with support main part face to end the position face, wheel components sets up two gyro wheels, and two gyro wheels are located the relative both sides of support main part, and each gyro wheel all has a pendulum arm rather than the cooperation.

In order to achieve the purpose, the following design scheme is adopted in the application:

an apparatus comprising a roller mechanism as claimed in any preceding claim.

Drawings

Fig. 1 is a perspective view of a roller mechanism according to the present application.

Fig. 2 is a partially exploded perspective view of a roller mechanism according to the present application.

Fig. 3 is a partially exploded perspective view of a roller mechanism according to the present application.

Fig. 4 is a sectional view taken along line a-a of fig. 1.

Fig. 5 is a partially exploded view of one of the roller mechanisms of fig. 4, showing the roller assembly separated from the roller mount.

FIG. 6 is a perspective view of a second embodiment of a roller assembly of a roller mechanism of the present application.

Fig. 7 is a partially exploded perspective view of the scroll wheel assembly of fig. 6, further illustrating the exploded perspective view with one of the scroll wheels removed.

FIG. 8 is a side view of the scroll wheel assembly of FIG. 6 with one of the scroll wheels removed, further illustrating the scroll wheel assembly in a stationary or uniform motion on level ground.

FIG. 9 is a side view of the scroll wheel assembly of FIG. 6 with one of the scroll wheels removed, further illustrating an instantaneous state of the scroll wheel assembly moving at an acceleration over flat ground.

FIG. 10 is a side view of the truck assembly of FIG. 6 with one of the wheels removed, further illustrating the truck assembly in a braked condition.

FIG. 11 is a front view of a third embodiment of a roller assembly of a roller mechanism of the present application.

Fig. 12 is a partially exploded perspective view of the scroll wheel assembly shown in fig. 11.

FIG. 13 is a side view of the scroll wheel assembly of FIG. 11 with one of the scroll wheels removed, further illustrating the scroll wheel assembly in a stationary or uniform motion on level ground.

FIG. 14 is a side view of the truck assembly of FIG. 11 with one of the wheels removed, further illustrating the truck assembly braked as the truck assembly moves with acceleration over flat terrain.

FIG. 15 is a side view of a fourth embodiment of a roller assembly of a roller mechanism of the present application with one of the rollers removed.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description of the present application, it is to be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 5, a roller mechanism of the present application is shown, wherein the roller mechanism includes a roller assembly 1 and a roller seat 2 assembled and fixed with the roller assembly 1. Wheel components 1 is a common bull's eye wheel, including gyro wheel support 11 and gyro wheel 12, gyro wheel 12 is spherical and rotatory the installation in gyro wheel support 11 below, wheel components 1 can realize 360 removals on the plane through the rotation of gyro wheel 12, forms the efficiency that the universal wheel is the same. The roller bracket 11 extends upward to form an installation shaft 110, and the installation shaft 110 is correspondingly assembled and fixed with the roller seat 2.

The roller seat 2 comprises a support seat 21, a mounting seat 22 assembled and fixed with the support seat 21, and an elastic mechanism 23 movably assembling the roller assembly 1 and the roller seat 2 together. In the present application, the supporting seat 21 and the mounting seat 22 are collectively referred to as a seat body, and in some cases, the supporting seat 21 and the supporting seat 21 may also be integrally provided.

The support base 21 is formed by bending a metal plate, and includes a brake base 211 and a mating base 212. The stopper seat 211 is formed with a horizontal stopper portion 2111 and a vertical fixing portion 2112 integrally connected to the stopper portion 2111 and extending in the vertical direction. The fitting base 212 includes a vertical fixing arm 2121 extending in the vertical direction and a horizontal limiting portion 2122 integrally connected to an upper end of the fixing arm 2121 and extending in the horizontal direction. In the present application, the brake seat 211 and the mating seat 212 are integrally formed with a reinforcing member 201 at a bending position for structural reinforcement, so that the brake seat 211 and the mating seat 212 can bear stronger pressure without deformation.

Referring to fig. 2 and 3, the mounting seat 22 is in a polygonal column shape (in this application, in a rectangular parallelepiped shape), and a mounting hole 220 is formed through the mounting seat 22 in an up-down direction. The shape fixing portion 2112 of the brake seat 211 is fixed to one side surface of the mounting seat 22 by screws, the brake portion 2111 is located at the lower end of the fixing portion 2112 in the vertical direction, and the brake portion 2111 and the mounting seat 22 are respectively located at different sides of the fixing portion 2112 in the horizontal direction; the fixing arm 2121 of the fitting seat 212 is fixed to the other side surface of the mounting seat 22 by a screw, and the limiting portion 2122 is located right above the mounting seat 22. An adjusting hole 2120 is formed through the limiting portion 2122 at a position right above the mounting hole 220 of the mounting base 22.

The elastic mechanism 23 includes an elastic member 231, an adjusting member 232, a limiting cap 233, a limiting member 234, an adapting sleeve 235 and a mounting post 236. The fitting sleeve 235 is accommodated and fixed in the mounting hole 220, and a displacement hole 2350 located right below the adjusting hole 2120 is formed in the fitting sleeve 235 in a vertical direction in a penetrating manner. The mounting post 236 is matingly received within the displacement bore 2350 and is movable in an up-and-down direction within the displacement bore 2350. The lower end of the mounting post 236 is fixed to the mounting shaft 110 of the roller assembly 1 (in this application, the lower end of the mounting post 236 is formed in a hollow tubular shape, and the mounting shaft 110 is inserted into the mounting post 236 by interference fit, but other fixing means, such as screwing, welding, etc., are easily available).

The elastic member 231 is a compression spring. The mounting post 236 is coupled or fixed to a lower end edge of the elastic member 231 (specifically, an upper end of the mounting post 236 is formed in a hollow tube shape, a lower end of the elastic member 231 is inserted into the mounting post 236, and an end of the elastic member 231 inserted into the mounting post 236 is fixed to the mounting post 236 and can be easily and directly elastically pressed against a corresponding position of the mounting post 236). Of course, in other embodiments, the lower end of the resilient member 231 may be directly secured to the upper end of the mounting post 236, such as by welding or the like. Of course, in other embodiments, the lower end portion of the elastic member 231 may be sleeved on the outer circumference of the mounting post 236, and specifically, the mounting post 236 is stepped to form a step shape with different diameters between the upper end and the lower end thereof, so that the upper end of the mounting post 236 is in clearance fit with the displacement hole 2350, and the lower end portion of the elastic member 231 is correspondingly sleeved on the outer circumference of the mounting post 236 in the clearance formed between the mounting post 236 and the displacement hole 2350.

In other embodiments, the mounting shaft 110 and mounting post 236 may be designed as a single piece. The adapter sleeve 235 and the mounting socket 22 may be designed as one piece.

The adjusting member 232 may be a screw with threads, the adjusting member 232 is in threaded fit with the adjusting hole 2120 and protrudes out of the adjusting hole 2120, the limiting cap 233 is located below the limiting portion 2122 and is sleeved on the periphery of the adjusting member 232, the upper end of the elastic member 231 is sleeved on the periphery of the adjusting member 232 below the limiting portion 2122, and the end of the elastic member abuts against the limiting cap 233. In this design, the limiting cap 233 is fixed to the adjusting member 232 and cannot move upward relative to the adjusting member 232. The regulation member 232 can be rotated downward to move the stopper cap 233 downward and apply a downward pushing force to the elastic member 231 for regulating the initial biasing force of the elastic member 231.

The periphery of the part of the upper end of the mounting column 236 protruding out of the upper end face of the adapting sleeve piece 235 is recessed with an annular limiting groove 2361, the limiting member 234 is a C-shaped ring, and the limiting member 234 is sleeved in the limiting groove 2361 to limit the downward excessive displacement of the mounting column 236.

The following describes the operation principle of a roller mechanism according to the present application in detail:

in the initial state, the elastic member 231 is extended by its own elastic force, so that the lower end edge of the roller 12 of the roller assembly 1 is located at a position (shown in fig. 4) below the stopper portion 2111 of the stopper seat 211, so that the roller assembly 1 can slide along a horizontal plane.

When the user presses the support base 21, the roller assembly 1 moves upward relative to the support base 21, the elastic member 231 is forced to contract until the lower surface of the braking portion 2111 contacts the ground and is supported on the ground. At this time, a braking state is entered (braking is performed due to the contact friction of the braking portion 2111 with the bottom surface), and the roller assembly 1 cannot slide along the horizontal plane.

The adjustment member 232 is arranged to adjust the magnitude of the elastic force of the elastic member 231 in the initial state (when the adjustment member 232 rotates downward, the elastic member 231 is energized to contract, and when the adjustment member 232 rotates upward, the elastic member 231 is released to extend), so as to adjust the magnitude of the required downward pressure in the process from the initial state to the braking state. This design gyro wheel mechanism has realized exerting oneself and has pushed down the function of braking, can be applied to equipment such as seat, crib, children's dining chair, electrical apparatus sales counter, realizes pushing down the function of braking.

Referring to fig. 6 to 10, a second embodiment of the roller assembly 1 of the present application is shown, in which the roller assembly 1 'includes a roller bracket 11' and a roller 12 'assembled and fixed on the roller bracket 11'. The roller bracket 11 ' includes a bracket body 111 ', a mounting shaft 110 ' (the mounting shaft 110 ' may be fixed to the bracket body 111 ' by screwing or welding), a pivot shaft 112 ' formed by horizontally extending both sides of the bracket body 111 ', and a swing arm 113 ' fixed to the bracket body 111 ' by assembling.

The number of the rollers 12 'is two, each of the rollers 12' is substantially disc-shaped, the axial center position of the roller 12 'is pivoted with the pivot shaft 112', and the roller 12 'can rotate by taking the pivot shaft 112' as a rotating shaft. The two rollers 12 'are recessed with swing arm grooves 120' on opposite surfaces thereof. The swing arm grooves 120 'are disc-shaped and coaxial with the roller 12', and a sawtooth-shaped stopping part 1201 'is formed on the inner circumferential groove wall of each swing arm groove 120' in a protruding mode. A stop groove 1202 'is formed between any two adjacent zigzag stop portions 1201'.

One end of each swing arm portion 113 'is pivotally connected to the bracket main body 111', and the other end of the swing arm portion 113 'can swing with respect to the bracket main body 111'. The pivot position of the swing arm 113 'and the bracket main body 111' is not overlapped with the axis of the roller 12 '(in other words, the pivot position of the swing arm 113' and the bracket main body 111 'is eccentric), so that the swing arm 113' can swing around the pivot position when the roller assembly 1 'moves in acceleration or deceleration, and when the swing arm 113' swings to a certain angle (see fig. 9), the free end of the swing arm 113 'can be engaged with the stop groove 1202' and can be matched with the sawtooth-shaped stop portion 1201 'to realize the rotation brake of the roller 12'.

Referring to fig. 8, in the present application, the pivot position of the swing arm 113 ' and the stand main body 111 ' is located obliquely above the axis of the roller 12 '. Of course, in other embodiments, the pivot position of the swing arm portion 113 ' and the stand main body 111 ' is located directly above the axis of the roller 12 ' (for example, the third embodiment of the present application, which will be described in detail below), and at this time, the length relationship between the length L from the pivot position of the swing arm portion 113 ' and the stand main body 111 ' to the lower end edge of the swing arm portion 113 ' and the length relationship between the inner radius R of the swing arm groove 120 ' do not necessarily have a magnitude relationship, and depends on the pivot position of the swing arm portion 113 ' and the stand main body 111 '.

Of course, in other embodiments, the pivot positions of the swing arm 113 ' and the stand main body 111 ' are located on both sides of the axis of the roller 12 ' or obliquely below, and in this case, the length L between the pivot position of the swing arm 113 ' and the stand main body 111 ' and the lower end edge of the swing arm 113 ' must be smaller than the inner radius R of the swing arm groove 120 '.

When the swing arm 113 'and the stand body 111' are located at the same pivot position, the length L is designed to affect the acceleration required for braking the acceleration of the roller assembly 1. Within a certain range, theoretically, the smaller the length L, the greater the acceleration required for braking the roller assembly 1. Of course, theoretically, the swing angle (the angle with the vertical direction) of the swing arm portion 113' due to the acceleration of the roller assembly 1 is 0 degree or more and less than 90 degrees on the horizontal plane

Of course, in any practical example, the pivotal connection position between the swing arm portion 113 'and the stand main body 111' cannot be set directly below the axis.

Referring to fig. 8, 9 and 10, fig. 8 shows the state of the swing arm 113 'when the roller assembly 1' is stationary on the flat ground or moving at a constant speed. Wherein fig. 9 shows the state of the swing arm portion 113 'when the scroll wheel assembly 1' is moved on the flat ground with a certain acceleration (small acceleration). Wherein fig. 10 shows a state of the swing arm portion 113 'when the roller assembly 1' is braked after moving on a flat ground with a certain acceleration (large acceleration).

Referring to fig. 9, the lower edge of the swing arm 113 'is designed to be sharp-angled and forms a sharp corner 11301', and the edge of the saw-toothed stopper 1201 'is also sharp-angled and forms a sharp head 1203'. The pointed portion 11301 'cooperates with the pointed head 1203' to facilitate the edge of the swing arm 113 'to snap into the stop groove 1202' during braking.

Referring to fig. 8 to 10, an inclined stop surface 1130 'is formed at an upper end of the swing arm portion 113', and when the swing arm portion 113 'swings and engages with the saw-tooth stop portion 1201' and the stop groove 1202 'to brake the roller 12', the stop surface 1130 'is in surface contact with the bracket main body 111' to realize an auxiliary braking limiting effect, so as to distribute a stress at a pivot position of the swing arm portion 113 'and the bracket main body 111'.

In the present application, two rollers 12 'are disposed on one roller assembly 1', and each roller 12 'has a swing arm portion 113' cooperating therewith to respectively realize front and rear direction acceleration braking.

Referring to fig. 11 to 14, a third embodiment of the roller assembly 1 of the present application is shown, in which the roller assembly 1 "also includes a roller bracket 11" and a roller 12 assembled and fixed on the roller bracket 11 ". The roller bracket 11 "includes a bracket main body 111", a mounting shaft 110 "formed by extending the bracket main body 111" upward (the mounting shaft 110 "can be easily assembled and fixed to the bracket main body 111" by a screw or by welding), and a swing arm portion 113 "fixed to the bracket main body 111" by assembly.

The holder main body 111 "has a substantially inverted U-shape, and a swing groove 1110" opened downward is formed in the middle thereof. The number of the rollers 12 "is two, each of the rollers 12" is substantially disc-shaped, the axial center position of the roller 12 "is pivotally connected with the bracket main body 111" through a pivot shaft 112 ", and the roller 12" can rotate relative to the bracket main body 111 "by taking the pivot shaft 112" as a rotating shaft. Swing arm grooves 120 'are formed on the opposite surfaces of the two rollers 12' in a recessed mode, and the swing arm grooves 120 'are in a disc shape coaxial with the rollers 12'.

Each of the swing arm portions 113 "includes a swing arm 1131" and a stopper arm 1132 "connected to one end (lower end) of the swing arm 1131". The upper end of the swing arm 1131 "protrudes into the swing arm slot 120" and is pivotally connected via the pivot 114 ". The swing arm 113 "can swing around the pivot 114" as a rotation axis. Referring to fig. 12 in conjunction with fig. 13 and 14, the swing arm 113 "has a laterally inverted T-shaped structure. The stop arm 1132 "protrudes into the swing arm slots 120" of both rollers 12 ".

The pivotal position of the swing arm 113 "and the stand body 111" is not overlapped with the axis of the roller 12 "(in other words, the pivotal position of the swing arm 113" and the stand body 111 "is eccentric), so that the swing arm 113" can swing around the pivotal position as the axis when the roller assembly 1 "moves. When the swing arm portion 113 ″ swings to a certain angle (see fig. 14), the stop arm 1132 ″ of the swing arm portion 113 ″ and the inner wall of the corresponding swing arm slot 120 ″ realize braking, specifically, the stop arm 1132 ″ is formed with a first stop surface 11321 ″ and a second stop surface 11322 ″ which are located on both sides of a straight line (when the swing arm 1131 ″ is located in the vertical direction, specifically, refer to the state of fig. 13) on which the swing arm 1131 ″ is located.

Referring to fig. 12 and fig. 13 and fig. 14, the pivotal connection position of the swing arm 113 "and the stand main body 111" is located right above the axis of the roller 12 "(although it may be located obliquely above or obliquely below in other embodiments).

Referring to fig. 13, the state of the swing arm 113 "of the roller assembly 1" when it is stationary on a flat ground or moving at a constant speed is shown. Fig. 14 shows a state of the swing arm 113 "when the roller assembly 1" is braked when moving to the right side with a certain acceleration on a flat ground, and at this time, the first stop surface 11321 "is frictionally braked with the inner groove wall of the corresponding swing arm groove 120" of the roller 12 ".

In the third embodiment, one swing arm portion 113 "is provided for one of the roller assemblies 1" to cooperate with two rollers 12 "for actuation, so as to realize acceleration braking in the front-rear direction, respectively.

In the third embodiment, the upper end edge of the swing arm 1131 "of the swing arm portion 113" is formed in a triangular shape and is formed with the adjustment surface 1133 ". The support main body 111 "is pivoted with an adjusting mechanism 1111" (in the present design, the adjusting mechanism 1111 "is an adjusting nut) directly above the adjusting surface 1133"), the adjusting mechanism 1111 "rotates upwards or downwards, and the lower end edge of the adjusting mechanism 1111" abuts against the adjusting surface 1133 "to adjust the swing amplitude of the swing arm portion 113" so as to adapt to replacing rollers 12 "with different diameters, so as to adapt to braking with different accelerations.

Referring to fig. 15, a fourth embodiment of the roller assembly 1 of the present application is shown, and the fourth embodiment is substantially the same as the third embodiment except that a square stop portion 1201 ' "(similar to the stop portion 1201 ' of the second embodiment) is formed on the inner groove wall of the swing arm groove 120 '". A stop groove 1202 "' (similar to the second embodiment) is formed between any two adjacent square stop portions 1201" ', and the stop portions 1201 "' are used for assisting the braking action. The actuating principle of the roller assembly 1' ″ in the fourth embodiment is basically the same as that in the third embodiment, and the description thereof is omitted.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein; any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The utility model provides a roller mechanism, includes pedestal, wheel components and elastic mechanism, wheel components includes roller support and gyro wheel, the gyro wheel is rotatory to be installed in the roller support, elastic mechanism includes elastic component and adjusting member, wheel components is fixed with the pedestal, elastic component forces to press and sets up between wheel components and pedestal, wheel components can be relative pedestal up-and-down motion, the pedestal is formed with braking portion, its characterized in that: when the seat body is not pressed downwards, the braking part is far away from the ground, the roller mechanism can move along with the rolling of the roller, when the seat body is pressed downwards, the braking part is supported on the ground, the roller mechanism cannot move, the adjusting component is installed on the seat body and is linked with the elastic component, and the adjusting component can realize the adjustment of the pressing size of the elastic component in the initial state.

2. The roller mechanism of claim 1, wherein: the gyro wheel support is formed with the installation axle, the pedestal is formed with the displacement hole that matches with the installation axle, the installation axle matches and holds in the displacement hole and can follow the up-and-down direction and move in the displacement hole.

3. The roller mechanism of claim 2, wherein: the elastic component is a compression spring, one end of the elastic component is arranged on the roller assembly, and the other end of the elastic component is arranged on the adjusting component.

4. The roller mechanism of claim 3, wherein: the adjusting component is a screw with threads, the adjusting component is in threaded connection with the base body, and the adjusting component can rotate and move in the up-and-down direction.

5. The roller mechanism of claim 4, wherein: the seat body comprises a supporting seat and an installation seat fixed with the supporting seat, the supporting seat is provided with a limiting part and a braking part, the displacement hole penetrates through the installation seat, the limiting part is located above the installation seat, the elastic component is located between the limiting part and the installation seat, and the adjusting component is installed on the limiting part.

6. The roller mechanism of claim 5, wherein: the periphery of the part of the upper end of the mounting shaft penetrating through the displacement hole and protruding out of the upper end face of the mounting seat is sunken to form an annular limiting groove, and the roller mechanism further comprises a limiting component which is sleeved in the limiting groove.

7. The roller mechanism of claim 1, wherein: the roller support comprises a support main body and an installation shaft formed by upward extending of the support main body, the axis position of the roller is pivoted with one side of the support main body, the roller assembly further comprises a swing arm portion, the swing arm portion is pivoted to the support main body, the lower end of the swing arm portion can swing relative to the support main body, and when the swing arm portion swings to an angle relative to the support main body, the lower end position of the swing arm portion brakes the roller.

8. The roller mechanism of claim 7, wherein: the swing arm comprises a support body, a swing arm groove is formed in the support body, a plurality of stopping portions are formed in the inner groove wall of the swing arm groove in a protruding mode, when the swing arm swings to an angle relative to the support body, the lower end position of the swing arm portion is matched with the stopping portions to achieve braking, a stopping groove is formed between any two adjacent stopping portions, the end portion of the swing arm portion abuts against the stopping grooves and is matched with the stopping portions to achieve abutting braking, in the axial direction of the roller, the pivoting position of the swing arm portion and the support body is not overlapped with the axis of the roller, and in the up-down direction, the pivoting position of the swing arm portion and the support body is not located right below the axis.

9. The roller mechanism of claim 8, wherein: the swing arm portion lower extreme edge becomes the design of closed angle form and forms closed angle portion, it is the cockscomb structure to end the position portion, it also becomes closed angle form and forms closed angle head to end the position portion edge, swing arm portion upper end position forms the slope form and ends the position face, it can contradict with support main part face to end the position face, wheel components sets up two gyro wheels, and two gyro wheels are located the relative both sides of support main part, and each gyro wheel all has a swing arm portion rather than the cooperation.

10. An apparatus comprising a roller mechanism as claimed in any one of claims 1 to 9.

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