CN2221507Y

CN2221507Y - Ball castor

Info

Publication number: CN2221507Y
Application number: CN 94236822
Authority: CN
Inventors: 谢中全
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-14
Filing date: 1994-07-14
Publication date: 1996-03-06
Anticipated expiration: 2004-07-14

Abstract

The utility model provides a ball castor, which has flexible wear-resistance, long lifetime and low cost under the condition of high load bearing. The utility model is characterized in that supporting position of the ball castor is provided with a transfer station for roller balls with annular belt-shaped and an annular return ring for the roller balls; the ball castor has more concise structure and beautiful surface, under the condition of pure rolling keeping. The ball castor can be widely used in all directions of machines, apparatuses, furnishings, electric appliances, etc. in production and life.

Description

The spherical universal wheel

The utility model belongs to universal caster wheel, especially the spherical universal wheel.

Relevant cardan wheel is number of patent application 91214560.9 and 92214048.0 described spherical universal wheels; Its cardinal principle is that the load place of thrust on the ball wheel that utilizes the ball in the cardan wheel to be subjected to terrestrial gravitation and rolled by the ball wheel forms circulation, with the pure rolling on the support ball wheel any direction; It must further improvedly mainly contain two aspects: the one, and the ball usage quantity is more, and the 2nd, structure is not too compact, and material consumption is bigger.

The purpose of this utility model is under the prerequisite that keeps spherical universal wheel pure rolling, to make that its structure is simpler and clearer.

For achieving the above object, the embodiment that the utility model provides is, in shell, establish a ring-band shape on the concave surface of load and ball is taken turns the same centre of sphere, be slightly larger than the load concave to centre of sphere radius, and the endless belt width is more than or equal to the ring-type cavity zone of 1.5 times of ball diameters---ball transfer district.Like this, the ball that makes ball take turns the top load can be carried towards the negative side that the ball wheel advances by the ring-band shape interlayer cavity in ball transfer district, relends to help ball to take turns and roll and advances to the friction force of ball, to overcome the influence of terrestrial gravitation, make ball between housing and ball wheel face, form circulation.For ball is more effectively circulated, following multiple specific embodiments is arranged: (1) is on ball transfer district ring-band shape circumference, along ball wheel surface trend, the structure that is the fluctuating convex in the circumference is set, this protrusion summit should be more than or equal to 1.5 times of ball diameters to the distance of load concave surface.Like this, make and be positioned at the advance ball of reverse side of ball wheel and just can not overcome the terrestrial gravitation influence and realize circulation by ball wheel friction force.(2) ball transfer district ring-band shape circle wall or protrusion are made of material full of elasticity.(3) circle wall or protrusion on the inboard endless belt in ball transfer district, be arranged to stretch into the inwall of the material full of elasticity in ball transfer district, after ring-band shape circle wall or protrusion were by the ball compression, ball transfer district revealed immediately.(4) can in ball transfer district, insert the annulus of a diameter less than sphere endless belt outer diameter---ball refluxes and encloses, and ball refluxes and encloses and can move about in ball transfer district, and countless balls are positioned among the ball backflow circle.(5) make ball reflux circle with material formation full of elasticity, perhaps with the various piece on the elastomeric material connection ball backflow circle.(6) several independently ball transfer district and corresponding load concave surfaces are set above same ball wheel.(7) each ball transfer district and corresponding load concave surface, be connected as a single entity by shared ball transfer district, ball transfer district passage width shared between adjacent two load concave surfaces should be more than or equal to two times of ball diameters.In the above-mentioned various scheme, load concave surface, ball transfer district are standard circular in the shell, also can be non-standard circle or other shapes, can be complementary state between load concave surface and ball transfer district shape, and the load concave surface also can be divided into several zones by recessed passage.

As required, can on above-mentioned cardan wheel, install dust-break seal ring and brake equipment.

Good effect of the present utility model is: (1) so make when the ball use amount reduces, also makes housing reduce with the material amount, thereby whole cost is descended owing to make ball be limited to sphere cocycle campaign; (2) structure more is becoming tight and gathers, and profile is more attractive in appearance.

Fig. 1 is a spherical universal wheel basic structure scheme drawing;

Fig. 2 is the scheme drawing that spherical universal wheel ball transfer district circumference is provided with the convex structure;

Fig. 3 is the structural representation of inserting material full of elasticity in the spherical universal wheel ball transfer district;

Fig. 4 inserts the structural representation that ball refluxes and encloses in the spherical universal wheel ball transfer district;

Fig. 5 is the structural representation that there are several load concave surfaces and corresponding ball transfer district in spherical universal wheel ball wheel top;

Fig. 6 is the structural representation that is connected as a single entity by shared ball transfer district between several load concave surfaces of spherical universal wheel ball wheel top.

Claims

1, a kind of spherical universal wheel, take turns by ball, housing, ball is formed, housing parcel ball wheel, ball in shell with between the ball wheel face, the ball wheel is from housing convexity exposed portions serve sphere, the inner walls at the relative load of shell endosphere wheel face place, when being sandwiched between shell endosphere wheel face and the inner walls when ball identically and the ball wheel with the concave surface of the centre of sphere, it is characterized in that: on the shell inwall, establish a ring-band shape and ball is taken turns the same centre of sphere around the housing concave spherical surface of load, its centre of sphere radius is slightly larger than load concave spherical surface radius, and the endless belt width is more than or equal to the zone of 15 times of ball diameter---ball transfer district.

2, spherical universal wheel according to claim 1, it is characterized in that: spherical zone shape circumference upper edge, ball transfer district ball wheel surface trend, be provided with and a plurality ofly be the structure of convex towards spherical zone shape inside circumference, this protrusion summit should be more than or equal to 15 times of ball diameter to load concave surface distance.

3, spherical universal wheel according to claim 1 and 2, it is characterized in that: ball transfer district ring-band shape circle wall or bulge-structure are made of material full of elasticity.

4, spherical universal according to claim 1 and 2 wheel is characterized in that: the inboard ring-band shape wall in ball transfer district is arranged to stretch into the inwall of the material full of elasticity in ball transfer district, but after circle wall was compressed, ball transfer district revealed immediately.

5, spherical universal wheel according to claim 1, it is characterized in that: in ball transfer district, insert the annulus of a diameter less than sphere endless belt outer, ball transfer district diameter---ball refluxes and encloses, ball refluxes and encloses and can move about in ball transfer district, and countless balls are positioned among the ball backflow circle.

6, spherical universal is taken turns according to claim 1 or 5, it is characterized in that: ball refluxes to enclose and selects for use material full of elasticity to serve as, and perhaps connects the each several part that the ball backflow is enclosed with elastomeric material.

7, spherical universal according to claim 1 wheel is characterized in that: several independently concave spherical surfaces of ball transfer district and corresponding load can be set on the same ball wheel.

8, according to claim 1 or 7 described spherical universal wheels, it is characterized in that: each ball transfer district and corresponding load concave surface, can be connected as a single entity by shared part ball transfer district, ball transfer sector width shared between adjacent two load concave surfaces should be more than or equal to two times of ball diameters.