Rotary connecting seat of universal wheel

Abstract

The utility model belongs to the technical field of universal wheels, and particularly relates to a rotary connecting seat of a universal wheel. The rotary connecting base comprises a connecting plate, a rotating plate and a positioning plate which are arranged in a stacked mode and are all provided with through holes, pin columns are arranged in the through holes in a penetrating mode, the two ends of the pin columns are connected with the connecting plate and the positioning plate respectively, a first annular ball set is arranged between the rotating plate and the connecting plate, and a second annular ball set is arranged between the rotating plate and the positioning plate. Each of the first annular ball group and the second annular ball group consists of a plurality of annularly arranged bearing balls and a positioning ring, the edge of the positioning ring is provided with a plurality of clamping holes corresponding to the bearing balls, and the bearing balls are movably arranged in the clamping holes; the rotary connecting seat is flexible in circumferential rotation, stable in bearing ball movement, compact in structure, economical and durable.

Description

Technical Field

[0001] The utility model belongs to the technical field of universal wheels, and specifically relates to a rotating connecting seat of a universal wheel. Background Art

[0002] A universal wheel refers to a mechanism in which the bracket installed on the caster can rotate 360 ​​degrees horizontally under dynamic or static load. The rotation of the wheel body is mainly achieved by rotating the bearing seat in the connecting bracket. Generally, the bearing seat is composed of a circumferential ball group and upper and lower covering plates. During the operation of the universal wheel, the circumferential ball group is subjected to horizontal and vertical forces at the same time. When the balls move in an circumferential direction, they are prone to dislocation, detachment from the sliding track, and even cause the balls to fall off and the universal wheel to fail to rotate. Utility Model Content

[0003] The utility model aims to provide a universal wheel rotating connection seat with flexible circumferential rotation and stable bearing ball movement, which has the characteristics of compact structure, economy and durability.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A rotating connecting seat for a universal wheel comprises a connecting plate, a rotating plate and a positioning plate which are stacked, all of which are provided with through holes, a pin is arranged through the through hole, both ends of the pin are respectively connected to the connecting plate and the positioning plate, a first annular ball group is arranged between the rotating plate and the connecting plate, and a second annular ball group is arranged between the rotating plate and the positioning plate, and it is characterized in that: the first annular ball group and the second annular ball group are both composed of a plurality of annularly arranged bearing balls and a positioning ring, the edge of the positioning ring is provided with a plurality of clamping holes, the clamping holes correspond to the bearing balls, and the bearing balls are movably placed in the clamping holes.

[0006] Additional technical features of the universal wheel rotating connection seat include:

[0007] The positioning ring is provided with a recessed edge or an arc-shaped flange plate on both sides of the clamping hole, and the recessed edge or the arc-shaped flange plate covers a part of the surface of the bearing ball;

[0008] ——A first annular groove is provided on one side of the rotating plate, a second annular groove corresponding to the first annular groove is provided on the connecting plate, and the first annular ball group is arranged between the first annular groove and the second annular groove; a third annular groove is provided on the other side of the rotating plate, a fourth annular groove corresponding to the third annular groove is provided on the positioning plate, and the second annular ball group is arranged between the third annular groove and the fourth annular groove;

[0009] The first annular ball group and the second annular ball group are respectively provided with a plurality of redundant balls at four quadrant points, and the redundant balls are respectively placed on the inner and outer sides of the annularly arranged bearing balls, and the four quadrant points of the positioning ring are provided with a plurality of through holes, and the through holes are respectively placed on the inner and outer sides of the clamping hole, and the redundant balls are placed in the through holes;

[0010] ——The diameter of the redundant ball is greater than the diameter of the bearing ball, the first annular groove and the second annular groove are respectively provided with a first concentric groove, the third annular groove and the fourth annular groove are respectively provided with a second concentric groove, the redundant balls of the first annular ball group are placed in the first concentric groove, and the redundant balls of the second annular ball group are placed in the second concentric groove;

[0011] ——A blocking plate is provided at one end of the pin, and the other end thereof is threadedly connected to a locking nut; or both ends of the pin are threadedly connected to locking nuts; or one end of the pin is fixedly connected to the connecting plate or the positioning plate, and the other end thereof is threadedly connected to a locking nut.

[0012] Compared with the prior art, the universal wheel rotating connecting seat provided by the utility model has the following advantages: the rotating connecting seat comprises a connecting plate, a rotating plate and a positioning plate which are stacked, and pins are passed through the through holes of the three plates, and a first annular ball group and a second annular ball group are respectively provided on both sides of the rotating plate, and the double-layer annular balls constitute a composite rotating bearing structure, which has the advantages of flexible rotation and long-term stability; secondly, since the first annular ball group and the second annular ball group are both composed of a plurality of annularly arranged bearing balls and a positioning ring, a clamping hole is provided on the edge of the positioning ring, and the bearing balls are movably placed in the clamping hole, that is, the bearing balls are limited by the positioning ring, so that their annular rolling is more standardized, and the bearing balls are prevented from shifting or falling off after the connecting seat is subjected to horizontal or vertical impacts, and the structure is simple and compact, safe, economical and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a universal wheel rotating connecting seat of the utility model;

[0014] Figure 2 The figure is a schematic diagram of another structure of a universal wheel rotating connecting seat. DETAILED DESCRIPTION

[0015] The structure and working principle of the universal wheel rotating connector provided by the utility model are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, unless otherwise specified, the terms "circumferential", "inside and outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set / provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0018] like Figure 1 As shown, the structure of the universal wheel rotating connecting seat includes a connecting plate 1, a rotating plate 2, and a positioning plate 3 which are stacked, all of which are provided with through holes, and a pin 4 is arranged through the through holes, and the two ends of the pin 4 are respectively connected to the connecting plate 1 and the positioning plate 3, a first annular ball group 51 is provided between the rotating plate 2 and the connecting plate 1, and a second annular ball group 52 is provided between the rotating plate 2 and the positioning plate 3, the first annular ball group 51 and the second annular ball group 52 are both composed of a plurality of annularly arranged bearing balls 501 and a positioning ring 6, and a plurality of clamping holes 61 are provided on the edge of the positioning ring 6, and the clamping holes 61 correspond to the bearing balls 501, that is, the positions correspond and are distributed in annular directions; the quantities correspond, and one bearing ball 501 is movably placed in one clamping hole 61.

[0019] Its working principle is as follows: the main body of the connecting seat is composed of a stacked connecting plate 1, a rotating plate 2 and a positioning plate 3, the three of which are positioned by a pin 4, and a first annular ball group 51 and a second annular ball group 52 are respectively arranged on both sides of the rotating plate 2, thereby realizing the relative annular rotation of the rotating plate 2, the connecting plate 1 is connected to the bottom of the equipment, and the rotating plate 2 is connected to a universal roller (not shown in the drawings) through a bracket 20 below.

[0020] Since the first annular ball group 51 and the second annular ball group 52 are both composed of a plurality of annularly arranged bearing balls 501 and a positioning ring 6, the edge of the positioning ring 6 is provided with a clamping hole 61, and the bearing balls 501 are placed in the clamping hole 61, so the bearing balls 501 are restricted by the clamping hole 61 of the positioning ring 6 during the annular rolling process, and will not deviate, fall off, and other problems, thereby achieving long-term stability. It should be noted that the bearing balls 501 are movably placed in the clamping hole 61, and the upper and lower top surfaces are in contact with the plate surface, achieving the effect of mutual sliding.

[0021] In the structure constituting the universal wheel rotating connection seat,

[0022] ——Preferably, the positioning ring 6 is provided with recessed edges 62 on both sides of the clamping hole 61, and the recessed edges 62 cover part of the surface of the ball. The recessed edges 62 surround the bearing ball 501 in an arc shape, further enhancing the limiting effect on the bearing ball 501. The recessed edges 62 on both sides of the clamping hole 61 can face the same side or can face opposite sides respectively. As an equivalent alternative, the recessed edges 62 can also be arc-shaped flange plates, whose cross-section is arc-shaped, consistent with the radius of the bearing ball 501, and shaped like a part of the side wall of a truncated cone;

[0023] In one embodiment, the rotating plate 2 is provided with a first annular groove 21 on one side, the connecting plate 1 is provided with a second annular groove 11 corresponding to the first annular groove 21, and the first annular ball group 51 is placed between the first annular groove 21 and the second annular groove 11; the rotating plate 2 is provided with a third annular groove 22 on the other side, the positioning plate 3 is provided with a fourth annular groove 31 corresponding to the third annular groove 22, and the second annular ball group 52 is placed between the third annular groove 22 and the fourth annular groove 31; that is, the first annular groove 21 and the second annular groove 11 constitute the sliding cavity of the first annular ball group 51, the third annular groove 22 and the fourth annular groove 31 constitute the sliding cavity of the second annular ball group 52, the bearing ball 501 moves circumferentially along the sliding cavity, the rotation is more sensitive and stable, the force is more balanced, and the service life of the connecting seat bearing mechanism is also extended;

[0024] --like Figure 2 As shown, as a preferred embodiment, the first annular ball group 51 and the second annular ball group 52 are respectively provided with a plurality of redundant balls (502, 502') at four quadrant points, and the redundant balls (502, 502') are respectively placed on the inner and outer sides of the annularly arranged bearing balls 501, and the four quadrant points of the positioning ring 6 are provided with a plurality of through holes (63, 63'), and the through holes (63, 63') are respectively placed on the inner and outer sides of the clamping hole 61, and the redundant balls (502, 502') are movably placed in the through holes (63, 63'), that is, the positioning ring 6 improves the stability of the annular movement through the radially arranged redundant balls (502, 502'), and the redundant balls (502, 502') cooperate with the bearing balls 501 to rotate in the annular direction, so as to prevent the rotation axis from being offset, thereby improving the durability of the annular ball group;

[0025] ——Furthermore, the diameter of the redundant balls (502, 502') is greater than the diameter of the bearing ball 501, and first concentric grooves (71, 72) are respectively provided in the first annular groove 21 and the second annular groove 11; second concentric grooves (73, 74) are respectively provided in the third annular groove 22 and the fourth annular groove 31, and the redundant balls of the first annular ball group 51 are placed in the first concentric grooves (71, 72), and the redundant balls of the second annular ball group 52 are placed in the second concentric grooves (73, 74), and the depth of the concentric grooves is greater than the depth of the annular grooves, so as to ensure that the center of the redundant balls (502, 502') and the bearing ball 501 are at the same level;

[0026] ——The connection methods of the two ends of the above-mentioned pin 4 with the connecting plate 1 and the positioning plate 3 respectively have various structures. For example, one end of the pin 4 is provided with a blocking plate 81, and the other end thereof is threadedly connected to a locking nut 82; or both ends of the pin 4 are threadedly connected to locking nuts; or one end of the pin 4 is fixedly connected to the connecting plate 1 or the positioning plate 3, and the other end thereof is threadedly connected to a locking nut, that is, the pin 4 locks the connecting plate 1, the rotating plate 2, and the positioning plate 3 into a whole in the axial direction of their through holes, thereby improving the structural strength of the rotating connecting seat.

[0027] The above-described implementation modes are only used to illustrate the technical solution of the utility model, and are not limiting conditions for the implementation of the utility model. Therefore, any other modifications or equivalent replacements of configuration dimensions and internal structures made to the technical solution of the utility model, as long as they do not depart from the spirit and scope of the technical solution of the utility model, should be included in the scope of the claims of the utility model.

Claims

1. A universal wheel rotating connection seat, comprising a stacked connection plate, a rotating plate, and a positioning plate, all of which are provided with through holes, through which pins are provided, and the two ends of the pins are respectively connected to the connection plate and the positioning plate, a first annular ball group is provided between the rotating plate and the connection plate, and a second annular ball group is provided between the rotating plate and the positioning plate, characterized in that: The first annular ball group and the second annular ball group are both composed of a plurality of annularly arranged bearing balls and a positioning ring. The edge of the positioning ring is provided with a plurality of clamping holes, the clamping holes correspond to the bearing balls, and the bearing balls are movably placed in the clamping holes.

2. The universal wheel rotary connection seat according to claim 1, characterized in that: The positioning ring is provided with recessed edges or arc-shaped flange plates at the edges of both sides of the clamping hole, and the recessed edges or arc-shaped flange plates cover a part of the surface of the bearing ball.

3. A universal wheel rotating connection seat according to claim 1 or 2, characterized in that: A first annular groove is provided on one side of the rotating plate, and a second annular groove corresponding to the first annular groove is provided on the connecting plate, and the first annular ball group is placed between the first annular groove and the second annular groove; a third annular groove is provided on the other side of the rotating plate, and a fourth annular groove corresponding to the third annular groove is provided on the positioning plate, and the second annular ball group is placed between the third annular groove and the fourth annular groove.

4. The universal wheel rotating connection seat according to claim 3, characterized in that: The first annular ball group and the second annular ball group are respectively provided with a plurality of redundant balls at four quadrant points, and the redundant balls are respectively placed on the inner and outer sides of the annularly arranged bearing balls; the four quadrant points of the positioning ring are provided with a plurality of through holes, and the through holes are respectively placed on the inner and outer sides of the clamping hole, and the redundant balls are placed in the through holes.

5. The universal wheel rotating connection seat according to claim 4, characterized in that: The diameter of the redundant ball is larger than the diameter of the bearing ball. The first concentric groove is respectively arranged in the first annular groove and the second annular groove, and the second concentric groove is respectively arranged in the third annular groove and the fourth annular groove. The redundant balls of the first annular ball group are placed in the first concentric groove, and the redundant balls of the second annular ball group are placed in the second concentric groove.

6. The universal wheel rotating connection seat according to claim 1, characterized in that: One end of the pin is provided with a blocking plate, and the other end thereof is threadedly connected to a locking nut; or both ends of the pin are threadedly connected to locking nuts; or one end of the pin is fixedly connected to the connecting plate or the positioning plate, and the other end thereof is threadedly connected to a locking nut.

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