CN2530825Y

CN2530825Y - Improved double-brake castor

Info

Publication number: CN2530825Y
Application number: CN 02201140
Authority: CN
Inventors: 朱惠雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-22
Filing date: 2002-01-22
Publication date: 2003-01-15
Anticipated expiration: 2012-01-22

Abstract

Disclosed is a dual brake truckle and the truckle frame is provided with a rotating wheel in a pivot way and the inner side of the rotating wheel is provided with a plurality of ring tooth parts in a concave way. The back of the truckle frame is provided with a shaft in a pivot way and the external diameter of the bottom is provided with a gear and the top is connected with the desk or the bottom of the trolley. The truckle frame is provided with a turning component and the transverse direction of the truckle frame is provided with a brake holder. The top of the holder is a positioning part for restraining the turning component turning in a pivot way. The brake holder is provided with a pivot hole for the rotating wheel restraining component in a concave and pivot way. The rotating wheel restraining component is an arc block body and is provided with a tooth connecting part in a concave way and is coupled with the ring tooth part of the inner side of the rotating wheel by a pivot deviation angle. The block body is extended and provided with a driving part in a convex way and is provided with an arc guiding groove according to the abdomen center of the tooth connecting part. The lower part of the rotating wheel restraining component is provided with a shaft restraining component and the front of the shaft restraining component is provided with a window in a concave way for the driving part. The end of the shaft restraining component is provided with a gear resisting part which is forwards coupled on the bottom of the shaft. The other end of the turning component extends into the inner side of the truckle frame and is arranged on the arc guiding groove. The extending end is provided with a stopping end for the positioning part of the top of the brake holder relatively stopping and positioning. The assembly and the position is simple and the brake effect is good and damage is not easy to occur.

Description

Improved dual brake car castor

One, technical field:

The utility model relates to the wheel braking device, relates in particular to a kind of improved dual brake car castor.

Two, background technology:

As shown in Figure 1, the dual brake car castor of commonly using, be a kind of tables and chairs that are installed in, the device at wheel positions such as wooden handcart, it is provided with a wheel carrier 1, be arranged with a perforation 1A on it, the involutory respectively runner 2 that is pivoted in the perforation 1A left and right sides, these runner 2 inner peripherys are arranged with several circular tooth parts 2A, the rotating shaft 3 that a free axis changes that is pivoted of the rear side of wheel carrier 1, rotating shaft 3 bottoms are installed with a gear 4, the front side of wheel carrier 1 pulling piece that can switch up and down 5 that is pivoted, the pulling piece 5 belows braking element 6 that is pivoted, this braking element 6 is in the shape of the letter V by the metal sheet punching press, in the middle of it is pivot 6A, its left and right sides end is made the pivot beat of lever with pivot 6A center, its left end is upwards transferred into an interlocking portion 7 of dividing right and left and protruding, carry out the chimeric stop of the diameter both sides tooth of this gear 4 relatively, its right-hand member lateral bending is converted into one and holds support portion 8, its dorsal part integrated punching is provided with a shell fragment portion 9, and at one side cooperation assist spring 9A, for the back stretch that holds support portion 8 side direction, power is compeled and to bottom offset compression shell fragment portion 9 in this top that holds bottom side when upwards pulled by pulling piece 5, support portion 8, when pulling piece 5 is pulled downwards, loosen the bottom side to holding the compressing of support portion 8, so release strength by returning of shell fragment portion 9, it is upwards passed and with the 2A of the inner circular tooth portion meshing location stop of both sides runner 2.During enforcement, because braking element 6 is to rely on the stressed top of balance pivot to compel drive controlling, the metal fatigue distortion takes place and makes interlocking portion 7 be difficult for aiming at gear 4 in regular meeting; Again, shell fragment portion 9 compressional axis are apart from too small, return to release tension force instability, weak point are often arranged, so that clear to gear 4 braking effects of runner 2 and rotating shaft 3, regular meeting's et out of order, the repeatable operation of longer ranging offset compressing also make braking element 6 because of the easy fracture damage of metal fatigue; In addition, the assembly operation of above-mentioned part, the location installing of also rather loaded down with trivial details trouble, particularly spring and braking element, regular meeting has because of human negligence unusually.

Three, summary of the invention:

In view of this, the purpose of this utility model is the existing above-mentioned shortcoming of commonly using for overcoming of dual brake car castor, and a kind of improved dual brake car castor is provided, and its assembling location is easy, and the brake stop operation is certain, is difficult for et out of order.

For solving above-mentioned technical matters, the utility model is taked following technical scheme.

The improved dual brake car of the utility model castor, it is provided with a wheel carrier, the involutory respectively runner that is pivoted about this wheel carrier, the inboard periphery of this runner is concaved with several circular tooth parts respectively, the wheel carrier rear side is with the rotating shaft that is pivoted of free axis commentaries on classics mode, its bottom external diameter is installed with a gear, and its top feeds to and connects the bottom side that is located at tables and chairs or chassis, the wheel carrier front side pulling piece that is pivoted; Its improvements are, the one-body molded brake bearing that laterally is convexly equipped with of the support body inner side of below, the corresponding pulling piece pivot of described wheel carrier place, the location division of the top side of this brake bearing for preventing the pulling piece pivot to pull, the terminal that the brake bearing laterally protrudes out is arranged with a pivot hole, this pivot hole cooperates the pivot pin serial connection runner that is pivoted to prevent part, runner prevents part to be and the cooresponding bending arc shape block of runner inside circumference, the top side of the relative pivot leading portion of this block is concaved with predetermined tooth pick division, by pivot deviation angle toe joint at the inboard circular tooth part of runner, the extension downwards of the relative pivot back segment of block is convexly equipped with one and drives portion, relatively below, tooth pick division veutro central fovea is provided with one identical with circumference song arc and run through the arc guide barrel of both sides, the manner that runner prevents the part below to move with lateral shaft is provided with a rotating shaft and prevents part, this rotating shaft prevention part front end is arranged with one and supplies the portion of driveing to stretch into contained window, and its end convexes with one and feeds to the resistance portion that nipper is connected on this rotating shaft bottom gear; The other end of the relative pivot of described pulling piece stretches into the wheel carrier inboard, the top side of this inserting end cooperates a pivot and is actively installed on the arc guide barrel that runner is prevented part, the bottom side of this inserting end convexes with one downwards and prevents end, and this prevention end is prevented the location relatively for the location division of brake bearing top side.Pulling piece utilizes the guiding of pivot and arc guide barrel, the deviation angle that restriction traction runner prevents part to pivot, make the tooth pick division of its top side circular tooth part meshing or that break away from the runner inboard that heads on, the resistance portion of part is prevented in the powerful pushing tow drive controlling rotating shaft that utilizes the below to drive portion simultaneously, synchronizing shaft moves meshing or breaks away from this shaft gear, reaches convenient and certain effect of assembling of castor dual brake car and operation.

For solving the problems of the technologies described above, the utility model can also be taked following technical measures.

Aforesaid improved dual brake car castor, wherein runner prevents the part bottom side to drive the front and back width of portion to prevent the front and back width equity of part window for good with rotating shaft, its bottom side is separated to form the front side and overhangs a compressible shell fragment, rear side downwards and overhang one downwards and resist arm, makes the drive controlling rotating shaft prevent the part axle to move to produce powerful asessory shaft to push away elastic force;

Aforesaid improved dual brake car castor, the bearing of wherein braking and wheel carrier are all plastic material moulding one, the location division of brake bearing top side is unsettled wavy rib of slab, so that vertical bullet Zhang Zhuli to be provided, curved respectively several the prevention ends for the pulling piece bottom side that are provided with in its top side are prevented the concave arc of location relatively;

Aforesaid improved dual brake car castor, wherein runner prevents the part bottom side to drive the grand jacking block that is provided with in resistance arm front side of portion, and this jacking block supports and stops the shell fragment rear side.

The utility model is simple in structure, and the assembling location is easy, and the braking effect ideal is difficult for et out of order, reaches design purpose.

Four, description of drawings:

Fig. 1 is for commonly using dual brake car Castor structure scheme drawing.

Fig. 2 is the utility model wheel carrier perspective view.

Fig. 3 is the utility model runner braking element perspective view.

Fig. 4 is the utility model integral planar textural association scheme drawing.

Fig. 5 is the utility model brake scheme drawing.

Fig. 6 is the utility model runner braking element action scheme drawing.

Fig. 7 is the utility model rotating shaft braking element action scheme drawing.

Five, the specific embodiment:

Consult Fig. 2 to shown in Figure 4, the improved dual brake car of the utility model castor, it is provided with a wheel carrier 10, two runners 20, a rotating shaft 30, a pulling piece 40, runner prevention part 50 and a rotating shaft and prevents part 60.

Consult shown in Figure 2, the pivoted hole 11 of end about the end face of wheel carrier 10 is provided with and runs through, the grand boss 12 that is provided with a column of its rear side, it axially is arranged with one and runs through the pivot hole 121 that pushes up the end, its front side is arranged with a slotted eye 13, and below slotted eye 13, form a receiving space 14, be convexly equipped with respectively about these slotted eye 13 bottom sides one have the perforation 131A pivot joint lug 131, the inboard one-body molded brake bearing 15 that laterally is convexly equipped with of the support body of these pivot joint lug 131 lower positions, this brake bearing 15 is all plastic material moulding one with wheel carrier 10, its top side is a unsettled wavy rib of slab and extends into a location division 151, these 151 top sides, location division are provided with several concave arcs 152, prevent the location to produce the power-assisted that vertical bullet opens relatively for pulling piece 40; The terminal that the brake bearing laterally protrudes out is arranged with a pivot hole 153, and these pivoted hole 11 below body veutros laterally are arranged with the chute 16 that the distolateral level in front and back connects; Runner 20 is with to commonly use product identical, the involutory left and right sides (as shown in Figure 4) that is hubbed on wheel carrier 10, these runner 20 inboard peripheries are concaved with several circular tooth parts 21 respectively, and its center is arranged with an axis hole 22, and this axis hole cooperates a wheel shaft 23 string to establish pivot to close and be positioned at the distolateral pivoted hole 11 of wheel carrier 10; As shown in Figure 4, the mode that rotating shaft 30 is changeed with free axis is hubbed on the pivot hole 121 of wheel carrier 10 bosses 12, and its bottom 32 external diameters are installed with a gear 33, and its top 31 feeds to and connects the bottom side that is located at tables and chairs or chassis; The mode that pulling piece 40 above lower shaft pivots are pulled is hubbed on, the slotted eye 13 of wheel carrier 10, the operation of pulling for brake, its bottom side has the plate body 41 that stretches into receiving space 14 downwards, be arranged with a perforation 411 in this plate body 41, this perforation 411 cooperates a pivot pin 42 and is connected in series the axle pivot articulates lug 131 in both sides perforation 131A, the plate body 41 top side inserting ends pivot 43 that vertically is pivoted, its bottom side is convexly equipped with the prevention end 44 of a bending arc shape downwards, for 151 top side concave arcs, the 152 involutory prevention location, location division of below brake bearing 15.

Consult shown in Figure 3, runner prevents part 50 to be and the cooresponding bending arc shape block of runner 20 inboard circular tooth part 21 circumference, its midline is arranged with one for containing the partition groove 51 that is combined in wheel carrier 10 pivot joint lugs 131 parallel both sides, its veutro end face is arranged with a through hole 52, to cooperate a pivot pin 53 serial connection pivots to be combined in the pivot hole 153 (shown in Figure 4) of this brake bearing 15, the top side of its relative pivot place leading portion is concaved with predetermined tooth pick division 54, consult shown in Figure 4 again, by axle pivot angular deflection toe joint at runner 20 inboard circular tooth parts 21, the extension downwards of its relative pivot place back segment is convexly equipped with one and drives portion 55, and this veutro center, 54 below, tooth pick division is arranged with one corresponding with the bent arc of circumference and run through the arc guide barrel 56 of both sides relatively, this bottom side of driveing portion 55 is predetermined separating part 55A, overhang a compressible shell fragment 551 downwards and form the front side, rear side overhangs one downwards and resists arm 552, and these resistances arm 552 front sides are grand to be provided with a jacking block 553 supports and to stop the shell fragment rear side.

Consult Fig. 2, shown in Figure 4, rotating shaft prevents part 60 to be a rigidity lath, its manner of moving with lateral shaft is located on the chute 16, its front end is arranged with a portion of driveing 55 for runner prevention part 50 and stretches into contained window 61, its end convexes with one and feeds to the resistance portion 62 that nipper is connected on these rotating shaft 30 bottom gears 33, the front and back width of window 61 is good with the front and back width equity with the portion's of driveing 55 bottom sides separation shell fragment 551 and resistance arm 552, as shown in Figure 7, during by the portion's of driveing 55 pivots skew to the compression butt application of force of shell fragment 551, cooperate compression shell fragment 551 moment elastic force, the gear 33 of toe joint rotating shaft 30 bottoms synchronously advances resistance portion 62 pushing tows of end, by above combination, become the improved dual brake car of the utility model castor.

Consult Fig. 4, shown in Figure 5, when pulling piece 40 is pulled downwards, pivot pin 42 on the plate body 41 is under the restriction guiding of axle head both sides arc guide barrel 56, be forced to raise and shift to the vertex of guide groove terminal, as shown in Figure 6, thereby can draw runner prevention part 50 is the skew of central forward pivoting angle with pivot pin 53, make the tooth pick division 54 on its top meshing circular tooth part 21 that heads in runner 20 inboards, as shown in Figure 7, prevent the window 61 of part 60 against this rotating shaft by the portion of driveing 55 of below, driven in synchronism is controlled its 62 gears 33 that move meshing in rotating shaft 30 bottoms of terminal resistance portion, reaches castor dual brake car and moves convenient certain braking effect; Otherwise, when pulling piece 40 is upwards pulled, pivot pin 42 on the plate body 41 is under the restriction guiding of axle head both sides arc guide barrel 56, be forced to descend and shift to the nadir of guide groove terminal, as shown in phantom in Figure 6, thereby can draw runner prevention part 50 is the reverse pivoting angle skew in center with pivot pin 53, make the tooth pick division 54 on its top oppositely break away from originally meshing to runner 20 inboard circular tooth parts 21, as shown in Figure 7, control its 62 reverse gears 33 that move disengaging rotating shaft 30 bottoms of terminal resistance portion by the portion of driveing 55 driven in synchronism of below, remove the function of dual brake car as shown in Figure 4, and synchronously.

Because the window 61 front and back width of the utility model shaft prevention part 60 are good with the front and back width equity with the portion's of driveing 55 bottom sides separation shell fragment 551 and resistance arm 552, when making 55 pivot skews of the portion of driveing shell fragment 551 is compressed the butt application of forces, the elastic force that cooperates compression shell fragment 551 instantaneous burst, the power that the terminal resistance of pushing tow portion 62 advances greatly strengthens, and reaches the more certain toe joint brake efficiency of countershaft 30 bottom gears 33; On the other hand, the location division 151 that these brake bearing 15 top sides become a unsettled wavy rib of slab to extend into, make this location division 151 produce the power-assisted that vertical bullet is opened, and prevention end 44 relative that several concave arcs 152 and plate body 41 bottom sides are convexly equipped with bending arc shape downwards in the top side contain to close and stop down, make pulling piece 40 to pull operation firm; Parts are by pivot pin string group in the utility model, make assembling fast really, avoid the appearance of the bad product that human negligence causes, and increase substantially the competitiveness of product in market.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims

1, a kind of improved dual brake car castor, it is provided with a wheel carrier, the involutory respectively runner that is pivoted about this wheel carrier, the inboard periphery of runner is concaved with several circular tooth parts respectively, the wheel carrier rear side is with the rotating shaft that is pivoted of free axis commentaries on classics mode, its bottom external diameter is installed with a gear, and its top upwards connects the bottom side that is located at tables and chairs or chassis, the wheel carrier front side pulling piece that is pivoted; It is characterized in that, the support body inner side of below, the corresponding pulling piece pivot of described wheel carrier place laterally is convexly equipped with a brake bearing, the location division of the top side of this brake bearing for preventing the pulling piece pivot to pull, the terminal that the brake bearing laterally protrudes out is arranged with a pivot hole, this pivot hole cooperates the pivot pin serial connection runner that is pivoted to prevent part, this runner prevents part to be and the cooresponding bending arc shape block of runner inside circumference, the top side of its relative pivot leading portion is arranged with predetermined tooth pick division, by pivot deviation angle toe joint at the inboard circular tooth part of runner, the extension downwards of its relative pivot back segment is convexly equipped with one and drives portion, relatively veutro center, below, tooth pick division is arranged with one identical with circumference song arc and run through the arc guide barrel of both sides, the manner that runner prevents the part below to move with lateral shaft is provided with a rotating shaft and prevents part, this rotating shaft prevention part front end is arranged with one and supplies the portion of driveing to stretch into contained window, and its end convexes with one and feeds to the resistance portion that nipper is connected on this rotating shaft bottom gear; The other end of the relative pivot of described pulling piece stretches into the wheel carrier inboard, the top side of this inserting end cooperates a pivot and is actively installed on the arc guide barrel that runner is prevented part, the bottom side of this inserting end convexes with one downwards and prevents end, and this prevention end is prevented the location relatively for the location division of brake bearing top side.

2, improved dual brake car castor according to claim 1, it is characterized in that, described runner prevent front and back width that the part bottom side drives portion with the front and back width equity of preventing the part window with rotating shaft for good, its bottom side is separated to form that the front side overhangs a compressible shell fragment downwards, rear side overhangs one downwards and resists arm.

3, improved dual brake car castor according to claim 1, it is characterized in that, described brake bearing and wheel carrier are all plastic material moulding one, the location division of brake bearing top side is unsettled wavy rib of slab, so that vertical bullet Zhang Zhuli to be provided, curved respectively several the prevention ends for the pulling piece bottom side that are provided with in its top side are prevented the concave arc of location relatively.

4, improved dual brake car castor according to claim 1 is characterized in that, described runner prevents the part bottom side to drive the grand jacking block that is provided with in resistance arm front side of portion, and this jacking block supports and stops the shell fragment rear side.