CN212928492U - Rotating shaft assembly and roller cage shoe - Google Patents

Abstract

The utility model discloses a pivot assembly and gyro wheel cage shoe, wherein the pivot assembly includes: a base plate; the support plate is fixed on the bottom plate; the two bearing seats are arranged on the support plate, and a given distance is reserved between the two bearing seats; the rotating shaft is arranged on the bearing seat through a bearing; wherein, the rotating shaft is fixedly connected with the swing arm of the roller cage shoe. Based on the utility model discloses a pivot assembly reliability is better relatively.

Description

Rotating shaft assembly and roller cage shoe

Technical Field

The utility model relates to a pivot assembly of gyro wheel cage shoe, the utility model discloses still relate to a gyro wheel cage shoe that is furnished with this pivot assembly.

Background

The basic structure of the roller shoe shown in fig. 1 is a common structure of a conventional roller shoe, and comprises a base plate 1, and the base plate 1 is used for mounting the roller shoe on a cage, for example, and is generally mounted by bolts or screws. The figure comprises a swing arm 5, one end of the swing arm 5 is arranged on a bottom plate 1 through a rotating shaft 8, the other end of the swing arm is hinged on the bottom plate 1 through a buffer 3, and the middle part of the swing arm is provided with a roller 7 through a roller shaft 6.

The general structure of the swivel arm 5 is that it comprises an extension, such as the vertical part of the swivel arm 5 shown in fig. 1, which is used to determine the installation space of the roller 7, or to determine the installation distance between the roller 7 and the base plate 1. The swing arm 5 further comprises an overhanging portion extending from the tail end of the extending portion to one side, the tail end of the overhanging portion is hinged with one end of the buffer 3 through a pin shaft 4, and the other end of the buffer 3 is hinged with the bottom plate 1 through a pin shaft 2.

The assembly between the base plate 1 and the swing arm 5 is an assembly via a rotating shaft 8, and belongs to one of the fixed hinge supports, which is the main load-bearing part, or the rotating shaft 8 is used to bear the main load, and therefore, in more applications, the fixed hinge support applied in the roller cage shoe is generally called a main swing shaft seat. At present, the use feedback is known, in the production process of the roller cage shoe, most of the rotating shaft 8 adopts an assembly mode that sliding bearings like the pin shaft 2 and the pin shaft 4 are matched with the pin shaft, and the structure generally has the phenomenon that the rotating part of the rotating shaft 8 is easy to loosen after being impacted by a cage guide in the actual use process, so that the noise is caused, and the service life of the roller cage shoe is further reduced; meanwhile, as the rotating part of the rotating shaft 8 is loose, the shaft water and sundries with higher corrosivity can easily enter the rotating shaft, so that the rotating shaft 8 is accelerated to be worn, and even more, the rotating shaft 8 can be broken to cause safety accidents.

Chinese patent document CN206680037U discloses a roller cage shoe with a fully sealed main swing shaft seat, which is different from the scheme of using a sliding bearing in the traditional main swing shaft seat. In order to achieve a reliable seal, in this patent document an integral sleeve is used, which is relatively short in its entirety, taking into account the lubrication of the two bearings provided. In contrast, the sliding bearing can provide a larger bearing area than the rolling bearing, so that the torsional resistance is relatively weak when the bearing distance provided by the two rolling bearings is relatively small, and the torsional shear is one of the main causes of the sealing failure of the bearing chamber.

Disclosure of Invention

An object of the utility model is to provide a relatively better pivot assembly of reliability, the utility model also provides a gyro wheel cage shoe of being furnished with this pivot assembly.

In an embodiment of the utility model, a pivot assembly is provided, as the main swing axle bed of gyro wheel cage shoe, include:

a base plate;

the support plate is fixed on the bottom plate;

the two bearing seats are arranged on the support plate, and a given distance is reserved between the two bearing seats;

the rotating shaft is arranged on the bearing seat through a bearing;

wherein, the rotating shaft is fixedly connected with the swing arm of the roller cage shoe.

Optionally, the bearing is a spherical plain bearing.

Optionally, the rotating shaft extends out of the outer end of the bearing seat to form a shaft head;

correspondingly, the swing arm is fixedly arranged on the shaft head.

Optionally, both ends of the bearing seat are sealed by sealing rings.

Optionally, the seal ring is a skeleton oil seal.

Optionally, a sleeve is sleeved at the shaft head, and the sleeve forms a connecting part of the swing arm connected to the shaft head.

Optionally, the end surface of the rotating shaft is provided with a screw hole;

a retainer ring is provided and is secured to the end of the shaft by screws to axially restrain the sleeve.

Optionally, the structure for connecting the swing arm and the shaft head is a plate body;

the roller of the roller cage shoe is arranged between the two plate bodies.

Optionally, the support plates correspond to the bearing seats one by one;

the distance between the two support plates is smaller than the distance between the two plate bodies.

In one embodiment of the present invention, a roller cage shoe with the aforementioned spindle assembly is also provided.

In the embodiment of the invention, the principle that the swing arm in the traditional roller cage shoe is simplified and narrowed is abandoned, the main swing shaft seat matched with the swing arm is configured into two bearing seat structures, a given distance is reserved between the two bearing seats, and compared with the traditional roller cage shoe, the span supported by the swing arm is improved, and the torsional shear acting on the main swing shaft seat by the swing arm has better resistance, thereby having better use reliability.

Drawings

Fig. 1 is a schematic front view of a roller cage shoe according to an embodiment.

FIG. 2 is a schematic diagram of a right side view of a roller cage shoe according to an embodiment.

FIG. 3 is a schematic view of a spindle assembly.

In the figure: 1. the novel bearing comprises a base plate, 2. a pin shaft, 3. a buffer, 4. a pin shaft, 5. a swinging arm, 6. a roller shaft, 7. a roller, 8. a rotating shaft, 9. a support plate, 10. a shaft sleeve, 11. a sleeve, 12. an elastic washer, 13. a screw, 14. a retainer ring, 15. a sealing ring, 16. a bearing and 17. a sealing ring.

Detailed Description

In general, in the art, the axial direction of the roller 7 is also the width direction of the roller 7, and although different mounting positions of roller lugs on, for example, a cage, may result in different up-down directions of the same type of roller lugs in use, it is conventionally understood that the side of the roller lug where the bottom plate 1 is located is the bottom side or lower side thereof, and the side of the roller 7 is located is the upper side thereof.

The width direction, i.e., the axial direction of the roller 7, is also generally referred to as the front-rear direction. The width of a conventional pivot arm is generally small, and the roller shaft 6 of the roller 7 can be mounted on the pivot arm 5 in a cantilevered manner, for example, in which case the shaft 8 is not only subjected to relatively large radial loads, but also to relatively large torsional shear moments. This assembly method determines the bearing stress condition to be very complicated, which is one of the reasons why the rotating shaft 8 is usually supported by a sliding bearing.

In the embodiment of the invention, as can be seen from fig. 2, the shaft 8 is relatively long, roughly corresponding to the length of the roller shaft 6, and the roller shaft is not mounted in a cantilevered manner, but rather is mounted on the swing arm 5 in a supported manner at both ends, in which case the form of the force applied to the shaft 8 is relatively simple.

Furthermore, the pivot assembly shown in fig. 3, i.e. the main pivot bearing seat of the roller cage shoe, has bearing seats separated from each other by a certain distance, the distance between the two bearing seats depends on the assembly space of the roller 7, as can be seen from fig. 2, the pivot arm 5 is mainly composed of two plate bodies, the roller shaft 6 is fixedly mounted on the two plate bodies, the plate bodies are flat plates and are parallel to each other, which also determines that the distance between the two bearing seats is basically determined in the case of satisfying the bearing seat mounting space.

It is understood that the plate body does not exclude the use of a step plate, and does not violate the concept of the present invention.

In fig. 3, the base plate 1, i.e. the base plate of the roller shoe, which may also be called a seat plate, is used for mounting the roller shoe on, for example, a cage, typically by means of bolts or screws.

The base plate 1 is typically a steel plate, an aluminum plate or an aluminum alloy plate.

To avoid interference of the movements, the shaft 8 generally requires a certain height of support, and therefore, a support 9 is provided, which is fixed to the base plate 1, the support 9 being generally, in conventional terms, part of the construction of a fixed articulated support, as will be clear to a person skilled in the art of machines.

The support plate 9 is used for supporting the bearing seat in fig. 3, and in fig. 3, two bearing seats are provided, which are constructed on the basis of a shaft sleeve 10, and the shaft sleeve 10 and the support plate 9 are fixedly connected, generally adopting a welded structure, and can also be integrally cast with the support plate 9 and the bottom plate 1.

The carrier plate 9 is supported substantially in the middle of the bearing housing in the axial direction of the bearing housing.

An inner ring is arranged in the bearing seat, one side of the inner ring forms a positioning spigot of the bearing 16, and the other side of the inner ring forms a positioning spigot of the sealing ring 17.

Accordingly, the bearing seats are spaced a given distance apart to allow some spacing between the bearings of the shaft 8, thereby reducing damage to the bearings 16 from torsional shear.

Further, the rotating shaft 8 is mounted on the bearing housing via the bearing 16. The pivot is fixedly connected to the pivot arm 5 of the roller cage shoe, so that the pivot assembly forms a fixed pivot bearing for the pivot arm 5, but rather than a sliding bearing, a rolling bearing is used, and two bearings 16 are provided, and the two bearings 16 are subjected to a relatively small torsional shear moment on the basis of two bearing blocks which are spaced apart from one another by a predetermined distance.

For said bearings 16, roller bearings or ball bearings can be used, while in the preferred embodiment, spherical bearings are chosen, which have a certain adaptability to torsional shear loads and thus a better adaptability with respect to the other bearings 16.

As can be seen in fig. 2 and 3, the shaft 8 extends from the outer end of the bearing housing to a spindle head; further, the swing arm 5 is fixedly attached to the spindle head. As can be seen from the foregoing, the length of the shaft 8 is directly related to the width of the roller 7, and substantially corresponds to the length of the roller shaft 6. The swivel arm 5 is mounted on the axle head or the swivel arm 5 is mounted on the outside of the bearing block, which on the one hand provides a shield on the outside of the bearing, forming a natural constraint, and on the other hand the spatial arrangement of the swivel arm 5 is relatively good in the case of relatively small spans between the bearing blocks.

As can be seen from fig. 3, both ends of each bearing seat are sealed by a sealing ring, i.e. the bearing seats are sealed by two sealing rings, i.e. sealing ring 15 and sealing ring 17, to improve the sealing performance of the bearing chamber and thus the service life of the bearing 16.

In the preferred embodiment, the seals 15 and 17 are preferably skeletal oil seals.

Further, since the swivel arm 5 is mainly formed of two plate bodies having a relatively small width, more precisely here expressed as thickness, in order to improve the reliability of the connection, a sleeve 11 is sleeved at the shaft head, which sleeve 11 forms the connection of the swivel arm 5 at the shaft head.

The sleeve 11 can be welded on the swing arm 5, and if a casting structure is adopted, the sleeve 1 and the swing arm 5 can be formed by integral casting.

In the structure shown in fig. 2 and 3, the end surface of the rotating shaft 8 is provided with a screw hole;

a collar 14 is provided, which collar 14 is fixed to the end of the shaft 8 by means of screws 13 to axially constrain the sleeve 11.

Claims (10)

1. A spindle assembly for use as a primary swing axle seat for a roller cage shoe, comprising:

a base plate;

the support plate is fixed on the bottom plate;

the two bearing seats are arranged on the support plate, and a given distance is reserved between the two bearing seats;

the rotating shaft is arranged on the bearing seat through a bearing;

wherein, the rotating shaft is fixedly connected with the swing arm of the roller cage shoe.

2. The spindle assembly of claim 1, wherein the bearing is a knuckle bearing.

3. The spindle assembly according to claim 1 or 2, wherein the spindle extends from the outer end of the bearing housing to a spindle head;

correspondingly, the swing arm is fixedly arranged on the shaft head.

4. A shaft assembly according to claim 3, wherein the bearing housing is sealed at both ends by sealing rings.

5. The spindle assembly according to claim 4, wherein the seal ring is a skeletal oil seal.

6. The spindle assembly of claim 3, wherein a sleeve is sleeved over the spindle head, the sleeve forming a connection for the pivot arm to the spindle head.

7. The spindle assembly according to claim 6, wherein the end face of the spindle is provided with a screw hole;

a retainer ring is provided and is secured to the end of the shaft by screws to axially restrain the sleeve.

8. The spindle assembly of claim 3, wherein the structure for connecting the swing arm to the spindle head is a plate;

the roller of the roller cage shoe is arranged between the two plate bodies.

9. The spindle assembly of claim 8, wherein the brackets correspond one-to-one to the bearing seats;

the distance between the two support plates is smaller than the distance between the two plate bodies.

10. A roller cage shoe incorporating a spindle assembly according to any one of claims 1 to 9.

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