阅读说明：本技术 带新型自动刹紧装置的脚轮 (Caster with novel automatic braking device ) 是由 刘婉梅 于 2019-10-08 设计创作，主要内容包括：一种带新型自动刹紧装置的脚轮,在支架内设有既可通过刹车片销沿条形避让孔滑向或滑离轮轴、又可绕刹车片销摆动的刹车片,而且刹车片的刹车面的两侧到刹车片销中心的距离比其中部到刹车片销中心的距离长,当踩下踏板来将刹车片推向轮轴后使弧形的刹车面贴到轮子的胎面来使脚轮处于刹车状态时,只要轮子产生往前或后滚动的趋势,轮子的胎面就会带动刹车片一起摆动,此时刹车片的最外端就会卡在轮子的胎面上,从而阻止轮子往前或后滚动,轮子滚动的趋势越大,刹车片的弧形刹车面对轮子胎面抱得越紧,以此达到自动刹紧的目的,从而不会出现刹不牢的情况,而且刹车片的弧形刹车面不会对轮子胎面造成损伤,因此本发明的结构更合理,刹车牢靠。(A caster with a novel automatic brake device is provided, a brake pad which can slide to or from a wheel shaft along a strip-shaped avoidance hole and can swing around the brake pad pin is arranged in a bracket, the distance from two sides of a brake surface of the brake pad to the center of the brake pad pin is longer than the distance from the middle of the brake surface of the brake pad pin, when a pedal is stepped down to push the brake pad to the wheel shaft and make the arc-shaped brake surface attach to the tread of a wheel to make the caster in a brake state, as long as the wheel has a tendency of rolling forwards or backwards, the tread of the wheel can drive the brake pad to swing together, the outermost end of the brake pad can be clamped on the tread of the wheel, thereby preventing the wheel from rolling forwards or backwards, the trend of the rolling of the wheel is larger, the arc-shaped brake surface of the brake pad is more tightly clasped to the tread of the wheel, thereby achieving the purpose of automatic brake, so that the condition of brake is not firm, and the arc-shaped brake surface of the brake pad can, therefore, the invention has more reasonable structure and firm braking.)

1. The utility model provides a take novel automatic tight device's of stopping truckle, includes bottom plate (1), last ripples dish (2), support (3), ripple dish (4), wheel (5), establish last steel ball (5) between last ripples dish (2) and support (3), establish lower steel ball (6) between support (3) and ripple dish (4) and automatic tight device () 8 of stopping, its characterized in that, automatic tight device (8) of stopping include shell fragment (81), footboard (82), separate board (83), return spring (84), brake block (85), wherein:

the pedal (82), the brake releasing plate (83) and the return spring (84) are connected in a pedal pin round hole (31) of the bracket (3) in a swinging mode through a pedal pin (86);

the brake block (85) obliquely crosses the tread of the wheel (5) and is connected in the strip-shaped avoidance hole (32) of the bracket (3) in a swinging and sliding mode through a brake block pin (87); the braking surface (851) of the brake pad (85) is an upward cambered surface, and the distance (D1) from the two ends of the braking surface to the center (871) of the brake pad pin is longer than the distance (D2) from the middle part of the braking surface to the center (871) of the brake pad pin;

the inner end arm (841) of the return spring (84) acts on the bottom surface of the transverse plate (34) of the bracket (3), and the outer end arm (842) acts on the bottom surface of the pedal (82);

the elastic sheet (81) is connected in an elastic sheet pin round hole (33) of the bracket (3) in a swinging way through an elastic sheet pin (88); the inner part of the elastic sheet (81) is respectively provided with a direction brake part (812) for braking the gear disc (4) and a support contact elastic sheet part (813) which is pressed against the bottom surface of a transverse plate (34) of the support (3), the middle part of the elastic sheet is provided with a pedal check part (811) which is pressed against the cambered surface (822) of the pedal (82), and the upper surface (814) of the outer end of the elastic sheet is supported on the brake sheet pin (87);

the outer part of the brake releasing plate (83) is suspended and extends out of the pedal part (821) of the pedal (82), and the inner part of the brake releasing plate is provided with a pedal non-return part (811) which can tilt the elastic sheet (81) to release a force application part (831) which can swing the pedal (82) upwards to reset;

and a brake pad pushing part (823) capable of pushing the brake pad pin (87) to slide towards the center direction of the wheel shaft along the strip-shaped avoiding hole (32) of the bracket (3) is arranged on the pedal (82).

2. The caster with the novel automatic brake device as claimed in claim 1, wherein the brake pad pushing part (823) is an eccentric pushing groove for the brake pad pin (87) to pass through, and the distance (D3) from the end inside to the center of the pedal pin (86) is shorter than the distance (D4) from the end outside to the center of the pedal pin (86).

3. The caster with the novel automatic braking device according to claim 1 or 2, characterized in that the upper end of the brake pad (85) is provided with a limit opening (852) which is clamped at two sides of the pedal pin (86) and used for limiting the positive and negative swing amplitude of the brake pad (85).

4. The caster with the novel automatic brake device as claimed in claim 3, wherein the front surface of the brake pad (85) is U-shaped, and the braking surface of the bottom surface is arched in the front direction.

5. The caster with the novel automatic tightening device according to claim 4, characterized in that the brake block (85) is provided with a reinforcing rib (853) on the upper surface of the braking surface (851) thereof.

Technical Field

The invention relates to a caster, in particular to a caster with an automatic braking device.

Background

All brake structures of the prior caster industry are composed of: brake shell fragment, footboard or AB footboard, and the pin is constituteed, it mainly presses the wheel by footboard drive shell fragment and implements the brake, another head of shell fragment brakes the direction, but often brake not firm wheel, for this reason, some truckle producers just do many barbs on the shell fragment and come out in order to increase frictional force, still can not brake (tighten) the wheel, but puncture the wheel on the contrary easily, and still need very energetically operate when the brake, at this moment can cause the deformation of accessory (mainly brake shell fragment, footboard), in case after warping, just can't realize the brake function more.

Therefore, the applicant improves the situation that the brake structure of the current caster has weak brake or is easy to deform, so that the service life is short.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the caster with the novel automatic braking device, which is more reasonable in structure and firm in braking, and the automatic braking function of the caster does not damage wheels.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a take novel tight device's of automatic braking truckle, includes bottom plate, last ripples dish, support, ripple dish, wheel, establish last steel ball between last ripples dish and support, establish the lower steel ball between support and ripple dish and the tight device of automatic braking, the tight device of automatic braking includes shell fragment, footboard, the board of separating the brake, return spring, brake block, wherein:

the pedal, the brake releasing plate and the return spring are connected in a pedal pin round hole of the bracket in a swinging mode through a pedal pin;

the brake block obliquely crosses the tread of the wheel and is connected in the strip-shaped avoidance hole of the bracket in a swinging and sliding manner through the brake block pin; the braking surface of the brake pad is an upward-arched cambered surface, and the distance from the two ends of the braking surface to the center of the brake pad pin is longer than the distance from the middle part of the braking surface to the center of the brake pad pin;

the inner end arm of the return spring acts on the bottom surface of the transverse plate of the bracket, and the outer end arm acts on the bottom surface of the pedal;

the elastic sheet is connected in an elastic sheet pin round hole of the bracket in a swinging way through an elastic sheet pin; the inner part of the elastic sheet is respectively provided with a direction braking part for braking the gear wave disc and a support contact elastic sheet part which is propped against the bottom surface of a transverse plate of the support, the middle part of the elastic sheet is provided with a pedal non-return part which is propped against the cambered surface of the pedal, and the upper surface of the outer end of the elastic sheet is supported on the brake sheet pin;

the outer part of the brake releasing plate is suspended and extends out of the pedal part of the pedal, and the inner part of the brake releasing plate is provided with a force application part which can tilt the non-return part of the elastic sheet to release the upward swinging reset of the pedal;

the pedal is provided with a brake pad pushing part which can push the brake pad pin to slide towards the center direction of the wheel shaft along the strip-shaped avoiding hole of the bracket.

In the improvement scheme of the caster wheel with the novel automatic braking device, the brake pad pushing part is an eccentric pushing groove for the brake pad pin to pass through, and the distance from the end close to the inner part to the circle center of the pedal pin is shorter than the distance from the end close to the outer part to the circle center of the pedal pin.

In the improvement scheme of the caster wheel with the novel automatic braking device, the upper end of the brake pad is provided with a limiting opening which is clamped at two sides of the pedal pin and used for limiting the positive and negative swing amplitude of the brake pad.

In the improvement scheme of the caster wheel with the novel automatic braking device, the front surface of the brake pad is U-shaped, and the braking surface of the bottom surface of the brake pad is arched in the front direction.

In the improvement scheme of the caster wheel with the novel automatic braking device, the brake pad is provided with a reinforcing rib on the upper surface of the braking surface.

Compared with the prior art, the invention has the beneficial effects that: because the brake block which can slide to or from the wheel shaft along the strip-shaped avoidance hole and can swing around the brake block pin is arranged in the bracket, the distance from the two sides of the brake surface of the brake block to the center of the brake block pin is longer than the distance from the middle of the brake block pin, when the pedal is stepped down to push the brake block to the wheel shaft so that the arc-shaped brake surface is attached to the tread of the wheel to enable the caster to be in a braking state, as long as the wheel has a tendency of rolling forwards or backwards, the tread of the wheel can drive the brake block to swing together, at the moment, the outermost end of the brake block can be clamped on the tread of the wheel, thereby preventing the wheel from rolling forwards or backwards, the greater the tendency of rolling of the wheel is, the tighter the arc-shaped brake surface of the brake block is clasped to the tread of the wheel, thereby achieving the purpose of automatic braking, thereby the situation of not braking can not occur, and the arc-shaped surface of the brake block, therefore, the invention has more reasonable structure and firm braking.

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

[ description of the drawings ]

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is an enlarged view of section I of FIG. 2;

FIG. 4 is an assembly schematic of parts of an embodiment of the invention;

FIG. 5 is a schematic view of an embodiment of the present invention between the brake plate and the wheel in three states (non-braking, and automatic tightening);

FIG. 6 is a schematic structural view of a pedal according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a brake pad according to an embodiment of the present invention.

[ detailed description ] embodiments

The invention relates to a caster with a novel automatic tightening device, which comprises a bottom plate 1, an upper corrugated plate 2, a bracket 3, a toothed corrugated plate 4, wheels 5, an upper steel ball 5 arranged between the upper corrugated plate 2 and the bracket 3, a lower steel ball 6 arranged between the bracket 3 and the toothed corrugated plate 4 and an automatic tightening device 8, wherein the structure of the caster is consistent with that of a commonly seen caster except the automatic tightening device, and detailed description is omitted herein. The automatic tight device 8 of stopping includes shell fragment 81, footboard 82, the board 83 of separating to brake, return spring 84, brake block 85, wherein:

the pedal 82, the brake releasing plate 83 and the return spring 84 are connected in the pedal pin round hole 31 of the bracket 3 in a swinging mode through a pedal pin 86;

the brake block 85 obliquely crosses the tread (namely the thickness direction) of the wheel 5 and is connected in the strip-shaped avoidance hole 32 of the bracket 3 in a swinging and sliding mode through a brake block pin 87; the braking surface 851 of the brake pad 85 is an upward cambered surface (viewed in the side direction), and the distance D1 from both ends of the braking surface to the center 871 of the brake pad pin is longer than the distance D2 from the middle of the braking surface to the center 871 of the brake pad pin, as shown in FIG. 7;

the inner end arm 841 of the return spring 84 acts on the bottom surface of the transverse plate 34 of the bracket 3, and the outer end arm 842 acts on the bottom surface of the pedal 82, as shown in fig. 2 and 3;

the elastic sheet 81 is connected in the elastic sheet pin round hole 33 of the bracket 3 in a swinging way through an elastic sheet pin 88; the inner part of the elastic sheet 81 is respectively provided with a direction brake part 812 for braking the toothed wave plate 4 and a support contact elastic sheet part 813 which is pressed against the bottom surface of the transverse plate 34 of the support 3, the middle part is provided with a pedal check part 811 which is pressed against the cambered surface 822 of the pedal 82, and the upper surface 814 of the outer end is supported on the brake sheet pin 87, as shown in fig. 2 and 3;

the outer part of the brake releasing plate 83 is suspended and extends to the pedal part 821 of the pedal 82, and the inner part is provided with a pedal non-return part 811 which can tilt the spring plate 81 to release a force application part 831 which swings and resets the pedal 82 upwards; normally, the exposed portion of the brake release plate 83 is shorter than the step portion 821 of the pedal 82.

The pedal 82 is provided with a brake pad pushing portion 823 capable of pushing the brake pad pin 87 to slide toward the center of the wheel shaft along the strip-shaped avoiding hole 32 of the bracket 3, so that the braking surface 851 at the bottom of the brake pad 85 is attached to the tread of the wheel.

When the invention is in the brake releasing state: the brake pad pin 87 is reset to the uppermost end of the strip-shaped avoiding hole 32 of the bracket 3, at this time, the brake pad 85 is in a suspended position relative to the tread of the wheel, i.e. the braking surface 851 at the bottom of the brake pad 85 is not in contact with the tread of the wheel 5 (as shown in the leftmost drawing of fig. 5); and the pedal non-return part 811 of the spring plate 81 always abuts against the arc surface 822 of the pedal 82.

When braking is to be performed, the pedal 82 is depressed, swinging about the pedal pin 86 with its outer end facing downwards, and: after the brake pad pushing portion 823 on the pedal 82 pushes the brake pad pin 87 to overcome the acting force of the elastic sheet 81, on one hand, the brake pad pin slides along the strip-shaped avoiding hole 32 on the bracket 3 in the wheel axle direction, so as to drive the brake pad 85 to slide along the wheel axle direction, and when the arc-shaped brake surface 851 of the brake pad pin contacts the tread of the wheel 5, the brake treading process is completed, as shown in the middle diagram of fig. 5; on the other hand, the brake pad pin 87 sliding downwards acts on the spring plate 81, the spring plate 81 is tilted to swing clockwise around the spring plate pin 88, and the direction brake part 812 at the inner end of the spring plate is engaged with the toothed wave plate 4 at the moment, so that the purpose of braking in the direction is achieved.

In the braking state, when the wheel tends to roll forwards or backwards, the tread of the wheel 5 will drive the brake pad 85 to swing together, at this time, because the distance from both sides of the braking surface 851 of the brake pad 85 to the center 871 of the brake pad pin is longer than the distance from the middle of the braking surface 85 to the center 871 of the brake pad pin (as shown in fig. 7), the outermost end of the braking surface 851 will be clamped on the tread of the wheel 5 (as shown in the two rightmost drawings of fig. 5, which are the automatic braking schematic diagrams when the wheel rolls forwards and backwards respectively), which is equivalent to adding a wedge-shaped obstacle a between the wheel and the arc-shaped brake pad on the left and right sides respectively (except that the obstacle is connected with the brake pad, as shown in the small part of the two rightmost drawings in fig. 5 and the trend of the section line of fig. 7, the obstacle is inserted more tightly between the wheel and the brake pad, the wheel is automatically braked, so that the wheel is prevented from rolling forwards or backwards, and the aim of automatically braking is fulfilled.

When the brake is to be released, a foot steps on the brake releasing plate 83 to make the brake releasing plate swing around the pedal pin 86, and then after the force application part 831 at the inner end swings the pedal non-return part 811 of the elastic sheet 81, the pedal non-return part 811 slightly swings away from the arc surface 822 of the pedal 82 to release the locking of the pedal, so that the pedal 82 swings and resets under the drive of the return spring 84; at this time, the brake pad pushing portion 823 of the pedal 82 releases the downward biasing action on the brake pad pin 87, so that the resilient plate 34 of the bracket 3 acts on the bracket contact resilient plate portion 813 at the inner end of the resilient plate 81, the resilient plate 81 swings counterclockwise around the resilient plate pin 88, and at this time, on the one hand, the direction stopping portion 812 of the resilient plate 81 leaves the toothed disc 4; on the other hand, the upper surface 814 of the outer end of the resilient plate 81 drives the brake pad pin 87 to slide along the strip-shaped avoiding hole 32 to the upper end far away from the wheel axle, so as to drive the brake pad 85 to slide away from the tread of the wheel, thus completing the braking process.

From the above, since the brake pad 85 capable of sliding toward or away from the wheel axle through the brake pad pin 87 and swinging around the brake pad pin 87 is arranged in the bracket 3, and the distance D1 from both sides of the braking surface 851 of the brake pad 85 to the center 871 of the brake pad pin is longer than the distance D2 from the middle thereof to the center 871 of the brake pad pin, when the pedal 82 is stepped to push the brake pad 85 toward the wheel axle and the arc-shaped braking surface 851 is attached to the tread of the wheel to put the caster in a braking state, as long as the wheel 5 tends to roll forward or backward, the tread of the wheel will drive the brake pad 85 to swing together, and at this time, the outermost end of the bottom of the brake pad will be clamped on the tread of the wheel to prevent the wheel from rolling forward or backward, the trend of the wheel is larger, the arc-shaped brake surface of the brake pad will be held tightly against the tread of the wheel, so as to achieve the purpose of automatic braking, and no unfirm situation will occur, and the arc-shaped braking surface of the brake block can not damage the tread of the wheel, so the structure of the invention is more reasonable and the brake is firm.

In this embodiment, the brake pad pushing portion 823 is an eccentric pushing slot for the brake pad pin 87 to pass through, and the distance D3 from the inner end to the center of the pedal pin 86 is shorter than the distance D4 from the outer end to the center of the pedal pin 86, as shown in fig. 6; when the pedal 82 is in the reset state, the pedal pin 86 is located at the shortest end of the eccentric push groove, and when the pedal is depressed, the upper side wall 8231 of the eccentric push groove pushes the brake pad pin 87 to slide along the push groove, so that the brake pad pin 87 cooperatively drives the brake pad 85 to slide toward the tread of the wheel until the brake pad pin 87 slides to the farthest end of the eccentric push groove, and the caster handles the braking state. Of course, the brake pad pushing portion 823 may have other structures such as a structure similar to an eccentric wheel, etc., as long as it can push the brake pad toward the wheel shaft to apply the braking surface thereof to the tread of the wheel when the pedal is depressed.

Preferably, the upper end of the brake pad 85 is provided with a limit opening 852 which is clamped on two sides of the pedal pin 86 and used for limiting the positive and reverse swing amplitude of the brake pad 85, and two side walls of the limit opening 852 are blocked on the pedal pin 86 to prevent the brake pad 85 from swinging too much under the driving of the wheel to cause the brake pad to lose the braking function after the brake pad swings over the head (when the tread of the wheel is too soft, in case that the rolling force of the wheel is too large and part of the braking surface of the brake pad is squeezed into the tread, the potential for turning over the brake pad exists). The limiting opening of the brake pad is generally V-shaped or U-shaped.

In this embodiment, the front surface of the brake pad is U-shaped, and the braking surface of the bottom surface of the brake pad is arched in the front direction; in order to enhance the strength of the brake pad 85, the upper surface of the braking surface 851 is provided with a reinforcing rib 853. The front surface of the brake block is arched so as to contact the tread part in the thickness direction of the wheel as much as possible when braking; the side surface is arched and is matched with the radius of the tread of the wheel.

Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made herein without departing from the principles and spirit of the invention as defined by the appended claims. Therefore, the detailed description of the embodiments of the present disclosure is to be construed as merely illustrative, and not limitative of the remainder of the disclosure, but rather to limit the scope of the disclosure to the full extent set forth in the appended claims.