CN2301344Y

CN2301344Y - Reinforced caster

Info

Publication number: CN2301344Y
Application number: CN 96214135
Authority: CN
Inventors: 刘金成
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-28
Filing date: 1996-06-28
Publication date: 1998-12-23
Anticipated expiration: 2006-06-28

Abstract

The utility model relates to a reinforced caster. A brake is installed at one end of the upper part of a rotary bracket (3), a vertical shaft (4) or (4') is installed at the other end of the rotary bracket (3), and a tower-shaped supporting base (401) or a flat plate supporting base (401') is installed on the rotary bracket (3). A ball bearing is arranged between the vertical shaft (4) or (4') and the rotary bracket (3) in a radial direction, and a needle bearing is arranged between the vertical shaft (4) or (4') and the rotary bracket (3) in an axial direction. A wheel (1) is composed of a wheel boss (208), an inner tyre (209) and an outer tyre (210). Anti-loose H-shaped slots are arranged among the wheel boss (208), the inner tyre (209) and the outer tyre (210) which are formed into integration by injection molding. The utility model has the advantages of good structural strength, uniform bearing force, reliable rotation, etc. The traditional castor has the common defects that the vertical shaft is easy to bend, the upper tile and the lower tile of the ball bearing are easy to deform, the eccentric abrasion and the looseness of the ball bearing are easy to happen, the wheel shaft is easy to generate axial float, the tyre is easily disengaged from the wheel boss, etc. The utility model thoroughly eliminates the common defects of the traditional castor.

Description

The heavier-duty universal caster wheel

The utility model relates to castor.

The existing castor such as the patent No. are that 7L92215659.X's " comprehensive braking universal caster wheel " and the patent No. is 90217551.3 " impact resistance Vibration proof castor " etc., there are some common shortcoming and defect in they, these shortcoming and defect mainly are owing to inconsiderate to usage condition and stressing conditions, thereby go wrong easily at aspects such as structural strength, rigidity, fatigue durabilitys.Below in conjunction with accompanying drawing 1a, 1b analyzes existing castor: because the vertical shaft of general castor and wheel shaft are eccentric the settings, thereby the generation couple makes vertical shaft be subjected to moment of deflection and produces buckling phenomenon under loading condiction, the transmission of power is more complicated also, it is simple that to rely on axial thrust ball and pearl watt be not enough, because structural strength is not enough, thereby along with the length of time, ball pearl watt generation depression, cause the ball pearl watt to be rotated around vertical shaft with its framework ring, and rub with setscrew nut, force nut to move back to detain and move, two ball pearls watt spacings strengthen up and down, and it is low early and high after or lower bead tile is loose at first but afterwards tight upper bead tile to occur, and ball is outwards come off, vertical shaft is seriously crooked, finally causes rotating malfunctioning.In addition, consider from the condition of transmitting of power, simple pancake upper bead tile and be easy to generate distortion for a short time because on one side stressed big another side is stressed above the swinging strut, and make ball produce catching phenomenon.In addition, rough surface at ubiquity aspect the manufacture craft condition, tensioning member and blanked part exist obvious defects and distortion, not only have a strong impact on attractive in appearancely, also have a strong impact on simultaneously the quality and the intensity of part itself.

The purpose of this utility model promptly is at above-mentioned the deficiencies in the prior art, particularly because inconsiderate to usage condition and stressing conditions, on design and structure, fail to take into full account the stability, the rigidity of structure, intensity, fatigue durability of vertical shaft and other part etc., and the vertical shaft bending in use usually takes place; Watt distortion of swinging strut and pearl; The ball eccentric wear, come off; The problem of aspects such as axle axial play and a kind of heavier-duty universal caster wheel is provided.

The purpose of this utility model is achieved through the following technical solutions:

A kind of heavier-duty universal caster wheel of forming by wheel, wheel shaft, swinging strut, vertical shaft and drg, wherein the swinging strut (3) as whole castor skeleton part is a kind of fork-shaped part, respectively has a flat hole on its both sides, bottom, and in flat hole, insert the flat end of wheel shaft (2) two end mills, wheel (1) is housed on wheel shaft (2); Brake pedal (5) is equipped with on top in swinging strut (3), an end, and the other end is equipped with vertical shaft (4), between vertical shaft (4) and the swinging strut (3) ball bearing of main shaft is housed radially, and needle bearing axially is housed; The lower end of vertical shaft has screw thread, with nut (410), floor clip (408) vertical shaft is fastened on the subiculum (405).The top of vertical shaft (4) has a boss, and the following shoulder of this boss withstands on the upper bead tile (402) of ball (404), and a turriform bearing (401) is housed on the last shoulder of boss, between vertical shaft (4) middle part and the subiculum (405) needle roller (406) is housed.Vertical shaft (4 ') upper end of another kind of scheme is a circular flat head, plate bearing (401 ') is housed below it, vertical shaft (4 ') passes the position of plate bearing (401 ') and mills four jiaos of band circular arcs of squarely, and the hole that plate bearing (401 ') matches with it is also for square; Between vertical shaft (4 ') and the subiculum (405) needle roller (406) is housed, lower end two side millings of vertical shaft (4 ') are flat, have the screw thread that is screwed into dowel bolt (410 ') in its centre hole, ball (404) is housed at plate bearing (401 ') and between above the swinging strut (3).Wheel (1) is made of wheel hub (208), interior tire (209), cover (210), all have anticreep I-shape groove between wheel hub (208) and the interior tire (209) and between interior tire (209) and the cover (210), and in mould, the three is being injection molded into one.Also have a lining (206) and needle roller (205) is housed between lining (206) and wheel shaft at wheel hub (208) center.At needle roller (205) two ends the disk spring (204) that prevents the bearing end float misalignment being housed also, is respectively two side cover (207) and packing rings (202) with flat hole in the outside, disk spring (204) two ends.Wheel shaft (2) mills flat two ends and all has tapped bore, and is screwed into dowel bolt (201) in tapped bore.

The utlity model has following advantage and effect:

1, owing to adopted turriform bearing (or plate bearing) to strengthen the area of load force, and to make load be not single down to transmit from vertical shaft, but vertical shaft and turriform bearing (or plate bearing) down transmit simultaneously, improved the state of equilibrium of load force greatly, particularly because the use of vertical needle roller and subiculum, guarantee the perpendicularity of vertical shaft and rotate alerting ability, thereby watt distortion of the bending of unlikely generation vertical shaft, swinging strut and pearl, ball eccentric wear, come off, finally cause rotating common disadvantages such as malfunctioning.Said structure of the present utility model not only is better than homemade caster wheel but also is better than U.S. famous brand " Ke Ersen " castor.

2, because tire is divided into bilayer, between layer and the layer and and wheel hub between be equipped with anticreep I-shape groove, in mould, they are injection molded into one with engineering plastics, solved to greatest extent that traditional castor tire easily takes place and the problem of wheel hub disengaging.

3, because wheel shaft two end mills are flat, the rotary support hole also is flat hole, thereby thoroughly solved wheel shaft with wheel turns, simultaneously owing to adopt needle bearing between wheel shaft and the wheel hub lining, therefore there are dust keeper and disk spring in two ends, have guaranteed the reliability of wheel turns and have overcome the bearing end float misalignment and the sound that bump sends.

The drawing of accompanying drawing is described as follows:

Fig. 1 a, 1b are a kind of typical structure of existing castor

Fig. 2 a, 2b are the front elevation and the lateral plan of the utility model heavier-duty universal caster wheel

Fig. 3 is the constructional drawing of embodiment two of the present utility model.

Be described further below in conjunction with drawings and Examples:

Embodiment one: see also Fig. 2 a, 2b, and contrast Fig. 1, heavier-duty universal caster wheel of the present utility model mainly is made up of wheel 1, wheel shaft 2, swinging strut 3, vertical shaft 4 and brake pedal 5, wherein swinging strut plays the effect that connects wheel shaft 2, supports wheel 1, vertical shaft 4 (and rotating element) is installed and drg is installed, and is the skeleton of whole castor.In the upper right corner of swinging strut 3 turriform bearing 401 is housed, it and vertical shaft 4 transmit the load of being accepted simultaneously, have strengthened the area of application force and act on the ball 404 of upper bead tile 402 and border with making force balance.Subiculum 405 is pressed into swinging strut 3 and in upright hole, its center needle roller 406 is housed from the bottom, it has played the double action of time rest and needle roller lining, has both kept the perpendicularity of vertical shaft 4, is difficult for producing crooked, and the rotation that has guaranteed vertical shaft 4 simultaneously again freely.Drg gear piece 407, floor clip 408 and nut 410 are housed below subiculum 405.Said structure is compared and can obviously be found out with this part-structure of prior art caster wheel shown in Figure 1, and the vertical shaft perpendicularity of prior art caster wheel do not ensure, is easy to generate crookedly, with swinging strut generation distortion, and upper and lower pearl watt is deformed.And turriform bearing 401 and ball 404 have been adopted in vertical shaft structure of the present utility model top, subiculum 405 and vertical needle roller 406 have been adopted in the bottom, thereby guaranteed the perpendicularity of vertical shaft, can not produce crooked, thoroughly solved the vertical shaft buckling problem and guaranteed and rotated freely, suffered load plane of action increasing in top and balance are down transmitted, compare thorough solved lower end nut and lower bead tile friction with traditional castor, move back to detain and move, cause that upper and lower pearl watt opening strengthens, deflection, the ball problem of aspect such as outwards come off.

The bottom of swinging strut 3 has the flat hole, and insert in this flat hole 2 liang of flat ends of end mill of wheel shaft, thereby prevents that thoroughly wheel shaft 2 from rotating with wheel 1.Wheel shaft 2 two ends centre holes have screw thread, and are screwed into dowel bolt 201.Tire 209 and cover 210 in the tire of wheel 1 is divided into, double-deck elastic body for injection mo(u)lding, wheel hub 208 also is injection mo(u)lding, it has two-sided reinforced rib, between wheel hub 208 and the interior tire 209 and the I-shape groove that all has anticreep between cover 210 and the interior tire 209, and in mould, divide three injection moulding integrators, so just as much as possible avoided traditional castor that the phenomenon that tire breaks away from wheel hub takes place easily.There is a lining 206 at wheel hub 208 centers, it also is injection molded into one with wheel hub 208, needle roller 205 (forming the lining disjunctor at needle bearing overcoat and wheel 1 center) is housed between lining 206 and the wheel shaft 2, at needle roller 205 two ends disk spring 204 is housed also, so not only can guarantee the axial effective clearance of needle bearing, also overcome the sound that bearing end float misalignment and bump send simultaneously.The outside, two ends at disk spring 204 is respectively two packing ring 202 and side covers 207 with flat hole.

Embodiment two: see also Fig. 4, the wheel 1 of embodiment two of the present utility model, wheel shaft 2, swinging strut 3 and brake pedal 5 are substantially the same with embodiment one, the structure of the difference vertical shaft part that is change to some extent.Vertical shaft 4 ' upper end of embodiment two is an oblate head, vertical shaft 4 ' a pass plate bearing 401 ' square opening, and insert in the hole of subiculum 405, vertical shaft 4 ' and subiculum 405 between needle roller 406 is housed.Drg gear piece 407 is housed below subiculum 405, vertical shaft 4 ' the lower end centre hole screw thread is arranged, and be screwed into a dowel bolt 410 '.Plate bearing 401 ' and the upper surface of swinging strut 3 between ball 404 is housed.

Claims

1, a kind of heavier-duty universal caster wheel of forming by wheel, wheel shaft, swinging strut, vertical shaft and drg, it is characterized in that: as the swinging strut (3) of whole castor skeleton part, it is a kind of fork-shaped part, respectively has a flat hole in its both sides, bottom, and in flat hole, insert the flat end of wheel shaft (2) two end mills, wheel (1) is housed on wheel shaft (2); Brake pedal (5) is equipped with on top in swinging strut (3), an end, and the other end is equipped with vertical shaft (4), between vertical shaft (4) and the swinging strut (3) ball bearing of main shaft is housed radially, and needle bearing axially is housed; The lower end of vertical shaft (4) has screw thread, with nut (410), floor clip (408) vertical shaft (4) is fastened.

2, heavier-duty universal caster wheel according to claim 1 is characterized in that: a turriform bearing (401) is housed in the upper right corner of swinging strut, and subiculum (405) is pressed into swinging strut (3) and in upright hole, its center needle roller (406) is housed from the bottom.

3, heavier-duty universal caster wheel according to claim 1, it is characterized in that: vertical shaft (4 ') upper end is a circular flat head, plate bearing (401 ') is housed below it, vertical shaft (4 ') passes the position of plate bearing (401 ') and mills squarely, and the hole that plate bearing (401 ') matches with it is also for square; Between vertical shaft (4 ') and the subiculum (405) needle roller (406) is housed, lower end two side millings of vertical shaft (4 ') are flat, and its centre hole is a screw and is screwed into dowel bolt (410 '), between plate bearing (401 ') and swinging strut (3) ball (404) is housed.

4, heavier-duty universal caster wheel according to claim 1, it is characterized in that: wheel (1) is made of wheel hub (208), interior tire (209), cover (210), all have anticreep I-shape groove between wheel hub (208) and the interior tire (209) and between interior tire (209) and the cover (210), and in mould, the three is being injection molded into one.

5, heavier-duty universal caster wheel according to claim 4 is characterized in that: also have a lining (206) and needle roller (205) is housed between lining (206) and wheel shaft at wheel hub (208) center.

6, heavier-duty universal caster wheel according to claim 5, it is characterized in that: at needle roller (205) two ends disk spring (204) is housed also, in disk spring (204) the two ends outsides be respectively two with the side cover (207) in flat hole with the packing ring (202) in flat hole.

7, heavier-duty universal caster wheel according to claim 1 is characterized in that: wheel shaft (2) mills flat two ends and all has tapped bore, and is screwed into dowel bolt (201) in tapped bore.