CN210340005U

CN210340005U - Light roller and roller cage shoe

Info

Publication number: CN210340005U
Application number: CN201921001592.3U
Authority: CN
Inventors: 杨建奎
Original assignee: Shandong Nuotai Electrical Equipment Co ltd
Current assignee: Shandong Nuotai Electrical Equipment Co ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-04-17
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses a light-duty gyro wheel and gyro wheel cage shoe, wherein light-duty gyro wheel realizes the lightweight based on the forging, include: the bearing seat is of a pipe sleeve structure, and a sleeve hole of the pipe sleeve structure is a bearing seat hole; an axial positioning structure is formed in the axial middle of the outline of the bearing seat; the hub comprises a hub body and a hub body, wherein the hub body is provided with two parts, each hub body is a single forged part and is provided with a sleeve body serving as a centripetal end part of the hub body, a rim serving as a centrifugal end part of the hub body and a spoke used for connecting the sleeve body and the rim, and a plurality of bolt holes are formed in the spoke; and a bolt for connection between the two hub bodies; the sleeve body is sleeved on the bearing seat, and one end, opposite to the other sleeve body, of the sleeve body is axially positioned on the axial positioning structure; the two wheel rims are sleeved on the bearing seat to form an assembly wheel rim for mounting the rubber wheel. Based on the utility model discloses a gyro wheel subtracts under the better condition of heavy effect, dynamic balance also easily guarantees.

Description

Light roller and roller cage shoe

Technical Field

The utility model relates to a light-duty gyro wheel, the utility model discloses still relate to a gyro wheel cage shoe.

Background

The roller cage shoe is generally installed on a cage and is matched with a cage guide arranged in the cage to guide the cage in the cage, the conventional structure of the roller cage shoe can be seen in pages 1 to 4 of a coal industry standard MT236-2011 (the standard name is a rectangular steel cage shoe), the conventional structure of the roller cage shoe comprises a bottom frame and a swinging arm, one end of the swinging arm is installed on the bottom frame through a hinge shaft, the other end of the swinging arm is connected with one end of a buffer through the hinge shaft, the other end of the buffer is connected on the bottom frame through the hinge shaft, and a roller is installed on the swinging arm.

The above is only the basic structure of the roller cage shoe, and in fact the roller cage shoe is not limited to such a structure, and in some implementations, the chassis has a vertical frame body that is substantially parallel to the swing arm, and an elastic component, such as a spring guide post assembly, is disposed between the swing arm and the vertical frame body.

Generally, the upper bottom plate and the lower bottom plate of a cage are respectively provided with 6 roller cage ears, three roller cage ears are arranged on each side of two opposite sides, the smallest roller cage ear is a roller cage ear with the model of L20, the weight of the roller cage ear is about 85kg (the roller cage ears of the same type produced by various manufacturers are different in weight), and the weight of 12 roller cage ears is 1020 kg. The largest roller lug is a model LS42.5 roller lug weighing approximately 425kg, and the total weight of the 12 roller lugs is 5100 kg. Obviously, the roller cage shoe used for cage guiding only has larger weight, can seriously affect the load capacity of the cage, and can generate huge energy consumption. Therefore, weight reduction of the roller cage shoe is always the focus of research in the field.

The wheel hub of present mainstream roller cage shoe generally adopts the cast member, and the cast member is for example the material selection scope of forging narrow, can only adopt cast aluminium, cast iron or cast steel to the cast member is generally big heavy, and the used material of cast member is generally hard brittle material, easily breaks the damage.

In the aspect of weight reduction, as in chinese patent document CN201043106Y, a lightweight wheel cage shoe is disclosed, and the means for achieving weight reduction is to use a spoke-type hub, i.e. weight reduction holes are formed between spokes, but as mentioned above, the cast part is generally hard and brittle material, and the strength of the cast part is inevitably reduced by using a spoke-type structure. Therefore, the thickness of the spoke arranged on the wheel is generally large, and the weight reduction range is relatively limited.

Furthermore, the technical problems that have to be faced in the casting field are the inherent defects of the castings, i.e. shrinkage porosity, sand porosity, relatively poor consistency of the castings, and the dynamic balance of the resulting roller ears is relatively poor due to the large random distribution of the casting defects such as shrinkage porosity, sand porosity, etc. on the castings.

Chinese patent document CN104895915A discloses a symmetrical hollow hub type roller cage shoe, which uses a pair of symmetrically-arranged hub bodies to reduce the casting cost under the condition of using a hollow hub, but the weight reduction mode is still the common weight reduction mode in the mechanical field. The hollow substance means that the hub adopts a spoke type hub and has a certain weight reduction space.

In addition, for the hub of the roller for the conventional roller cage shoe, two or three hub bodies are generally provided, and the hub bodies are generally tightly attached in the axial direction of the hub, so that the structural assembly reliability is relatively good, but the shear section coefficient is relatively small.

Further, although a certain cavity exists between the two hubs of the hub body disclosed in chinese patent document CN104895915A, the cavity needs to satisfy the reliability of positioning and assembling of the two hubs, rather than the design for weight reduction, mainly from the viewpoint of assembling or molding manufacturability between the two hubs.

Disclosure of Invention

In view of this, the utility model discloses select a new direction, use the forging to replace the casting, and avoid falling the inherent defect of casting to a light-duty gyro wheel that dynamic balance also easily guaranteed under the better condition of weight reduction effect is provided, the utility model also provides a possess the gyro wheel cage shoe of this light-duty gyro wheel.

An embodiment of the utility model provides a light-duty gyro wheel is used as the gyro wheel of gyro wheel cage shoe, light-duty wheel hub includes:

the bearing seat is of a pipe sleeve structure, and a sleeve hole of the pipe sleeve structure is a bearing seat hole; an axial positioning structure is formed in the axial middle of the outline of the bearing seat;

the hub comprises a hub body and a hub body, wherein the hub body is provided with two parts, each hub body is a single forged part and is provided with a sleeve body serving as a centripetal end part of the hub body, a rim serving as a centrifugal end part of the hub body and a spoke used for connecting the sleeve body and the rim, and a plurality of bolt holes are formed in the spoke; and

the bolt is used for connecting the two hub bodies;

the sleeve body is sleeved on the bearing seat, and one end, opposite to the other sleeve body, of the sleeve body is axially positioned on the axial positioning structure;

the two wheel rims are sleeved on the bearing seat to form an assembly wheel rim for mounting the rubber wheel.

In the light hub, optionally, the end of the sleeve body connected with the spoke body is the end opposite to the end positioned by the axial positioning structure.

Alternatively, the connection point of the rim to the spoke is its end opposite the other rim.

Optionally, the part of the spoke connected with the rim is a first straight spoke, and the part connected with the sleeve body is an arched spoke or a second straight spoke;

the first straight spoke and the bow spoke or the second straight spoke are smoothly connected, and correspondingly, a first surface of the hub body opposite to the other hub body and a second surface of the same hub body opposite to the first surface are continuously guided curved surfaces;

wherein, the bolt hole is opened on the first straight spoke body.

Optionally, a first distance is formed between the two first straight spokes;

the first distance is 0.15-0.22 times of the axial length of the bearing seat.

Optionally, the axial positioning structure is an outer collar formed on the outer surface of the bearing seat, and has two positioning shoulders;

and a second distance is reserved between the two end faces of the outer collar, the second distance is greater than the first distance, and the second distance is not greater than 0.25 time of the axial length of the bearing seat.

Optionally, the spoke body is provided with spoke holes; or

The spokes consist of spokes not less than 3 and not more than 6 in number.

Optionally, the ends of the rim have a rim extending radially of the hub.

Optionally, a sleeve body of a hub body is welded with the bearing seat;

the other wheel hub body is sleeved on the bearing seat and then connected with the wheel hub body welded on the bearing seat through a bolt.

According to the utility model discloses an embodiment still provides a gyro wheel cage shoe that possesses aforementioned light-duty wheel hub.

The embodiment of the utility model relates to an in, adopt forged wheel hub body to replace cast wheel hub body, inherent defects such as shrinkage cavity, shrinkage porosity or sand hole can not appear in the forging, and intensity will be higher than the casting under the same material, weight and the same shape condition, in other words, under the same intensity requirement condition, possesses littleer weight. In addition, the forging part has better toughness, is not easy to break and has better use safety. The precision of die forging is higher, and the uniformity of the hub body is better, in other words, the replaceability of the hub body is better. The utility model discloses an in the embodiment, two wheel hub body geometric shape and weight are unanimous basically, and the gyro wheel that forms, load center are roughly at the middle part of bearing frame bearing, and the supporting rubber tyer is difficult to take place the skew and the too big problem of local atress that causes, consequently, can effectual improvement gyro wheel cage shoe's life.

In addition, as the wheel hub body of the forged piece, the dynamic balance of the wheel hub body is relatively good after the wheel hub body is assembled into the roller wheel because the defect that shrinkage porosity, shrinkage cavities or sand holes and the like influence the homogeneity of the wheel hub body does not exist.

Drawings

FIG. 1 is a schematic main sectional view of a lightweight roller according to an embodiment.

FIG. 2 is a schematic cross-sectional view of a hub body according to an embodiment.

FIG. 3 is a schematic cross-sectional view of a bearing seat in an embodiment.

FIG. 4 is a left side view of the hub body in an embodiment.

In the figure: 1. the hub comprises a hub body, 2. a bearing seat, 3. a cavity, 4. a bolt, 5. an elastic washer, 6. a rubber wheel, 7. a nut, 8. a flat washer and 9. an elastic washer.

11. The wheel comprises a wheel flange, 12 a wheel rim, 13 a first annular groove, 14 a straight spoke body, 15a bent spoke body, 16 a sleeve body, 17 a central hole, 18 a second annular groove and 19 a bolt hole.

21. Screw hole, 22, inner collar, 23, bearing seat hole, 24, outer collar.

Detailed Description

Referring to the accompanying drawing 1, which is a schematic main sectional structure of a light roller in an embodiment, in general, taking fig. 1 as an example, the remaining part after removing a rubber wheel 6 will be referred to as a hub, the structure shown in fig. 1 may be referred to as a roller, or may be understood as a simplified roller, and in some cases, a roller shaft, a bearing, and a sealing structure (end cover, bearing cover, etc.) assembled at two ends of a bearing seat 2 are all included, and are referred to as a roller as a whole.

The basic reference frame of the roller is the axial, radial and circumferential directions of the roller shaft, and most of the other parts require relatively high coaxiality with the axis of the roller shaft, and the other parts, such as the hub body 1, have axial, radial and axial directions substantially consistent with the axial, radial and circumferential directions of the roller shaft.

In addition, for the structure shown in fig. 1, two hub bodies 1 are matched to form a cavity 3, wherein the cavity 3 is located at the inner part and is outward from the cavity 3.

In fig. 1 and 3, bearing blocks 2 are used to mount the rollers on the roller axles of the swing arms on the roller ears, which are typically fixedly connected to the swing arms. A pair of bearings is typically mounted in the bearing housing 2, bounded by an inner collar 22 in fig. 3, the inner collar 22 serving to locate the inner race of the bearing.

The bearing used by the current roller cage shoe roller is mainly a tapered roller bearing, and the thick ends of the outer rings of the two matched tapered roller bearings are opposite. Deep groove ball bearings or combination bearings may also be employed.

One end of the bearing seat 2 is blocked by an end cover, the end cover is assembled by a screw which is matched with a screw hole 21 in the figure 3, and a sealing ring can be clamped between the end cover and the bearing seat 2.

The other end of the bearing pedestal 2 is blocked by a bearing cover, and the bearing cover is arranged at the other end of the bearing pedestal through a screw. The bearing cover is provided with a through hole for the roller shaft to penetrate out.

The bearing housing 2 shown in fig. 1 and 3 is generally of a tubular sleeve construction, and the housing 2 may also be formed by forging, or in some embodiments, by precision casting, such as lost wax casting.

The bearing support 2 is provided with mainly four positioning portions, one of which is an outer collar 24 shown in fig. 3 for positioning the axially inner end of the hub body 1, i.e., the end opposite the two hub bodies 1. The other is an inner collar 22 for axial location of the bearing outer race. Then there is a bearing seat bore 23 for ensuring the coaxiality between the bearing and the bearing seat 2. The other is the outer cylindrical surface of the bearing seat 2, which is mainly used for forming shaft hole matching with the sleeve body 16 of the hub body 1.

The outer collar 24 in fig. 3 serves as an axial locating structure for the hub body 1, the collar being an on-axle structure that provides two shoulders for locating on-axle parts.

In the mechanical field, the shoulder means a portion of the stepped shaft where the sectional dimension changes, and one outer collar 24 has two shoulders based on the change in diameter with the body of the bearing housing 2. The shaft shoulder can be divided into a positioning shaft shoulder and a transition shaft shoulder, and the shaft shoulder in the embodiment is the positioning shaft shoulder.

Based on the principle that fig. 1 is a substantially bilaterally symmetrical structure, the outer collar 24 is disposed centrally in the axial direction of the bearing housing 2.

In contrast, the inner collar 22 is located to the left in fig. 3, and there are two main mounting structures for the roller shaft of the roller on the swing frame, one of which is an overhanging structure suitable for the case where the inner collar 22 is offset to the left in fig. 3, under the condition that the load can be effectively distributed on the roller shaft based on the structure shown in fig. 3.

As for the hub body 1, as shown in fig. 1, the hub body 1 is provided in two pieces, and in the structure shown in fig. 1, the two hub bodies 1 are symmetrical with respect to the axial middle section of the bearing housing 2.

Comparing fig. 2 and 3, the surface of the hub body 1 is generally a continuous surface, conforming to the forged feature, whereas the castability feature is not apparent, and it can be seen that the hub body 1 is generally the same thickness throughout.

It will be appreciated that the forging process can forge workpieces having different thicknesses throughout and that the strength requirements throughout the hub body 1 are not completely consistent throughout, and thus, the thickness of the hub body 1 may be inconsistent throughout and adapted to the strength requirements in the radial direction of the hub body 1.

The structure shown in fig. 2 is a schematic main sectional structure of the hub body 1, and if the geometry shown by the hatching at the lower part of the figure is taken as a generatrix, the hub body 1 is a solid of revolution formed by the rotation of the geometry about the axis of the hub body 1 in the figure.

In fig. 4, the hub body has a center hole 17 for fitting with the outer cylindrical surface of the bearing seat 2 to form a shaft hole, and the portion providing the center hole 17 is a sleeve 16, and eccentric end portions of the hub body 1 are provided at upper and lower ends of fig. 2 to form a rim 12, and the rim 12 is used to support a rubber wheel.

The two rims 12 form a rubber wheel groove in the state shown in fig. 1, and the rubber wheel 6 is axially positioned, in some embodiments, one hub body 1 is fixedly arranged, the hub body 1 is welded on the bearing seat 2, then the rubber wheel 6 is sleeved on the hub body, the other hub body 1 is sleeved on the end opposite to the end where the hub body 1 is fixed, the two hub bodies 1 are connected through the bolt 4, and locking is carried out, so that the rubber wheel 6 is reliably locked in the rubber wheel groove.

One end of the fixedly arranged hub body 1 is the end of the roller shaft which is arranged on the swing frame.

The rim 12 and the sleeve 16 are connected by a spoke, wherein the spoke is provided with 6 bolt holes 19, in the figure, the number of the bolt holes 19 is not less than 3, but is not more than 8.

In fig. 1, adapted to the bolt 4, the bolt head side is provided with a spring washer 5, and on the nut 7 side, a flat washer 8 and a spring washer 9 are provided to improve the locking capacity of the bolt 4 and the nut 7.

The sleeve body 16 of the two hub bodies 1 is sleeved on the bearing seat 2, the inner end of the sleeve body is positioned on the outer shaft ring 24 shown in figure 3, and the two hub bodies 1 are symmetrical relative to the axial middle section plane of the bearing seat 2.

Regarding the spokes, the whole spokes can be straight spokes, and can also be a multi-segment structure connected in sequence in the radial direction, such as the structure shown in fig. 2, which has a larger shear section coefficient and can have higher rigidity under the condition that the thickness of the material used for the hub body 1 is smaller.

The end of the sleeve 16 connected to the spokes is opposite to the end positioned by the axial positioning structure, that is, the end of the sleeve 16 connected to the spokes is the outer end of the sleeve 16, so that the two spokes and the corresponding sleeve 16 have a relatively long distance therebetween, thereby forming the cavity 3 shown in fig. 1, the profile is enlarged, the overall shear section coefficient is increased under the condition of the same total weight, in other words, the overall rigidity of the roller is relatively high under the condition of relatively small overall weight.

While for the rim 12, the connection point with the spoke is the end opposite the other rim 12, i.e. the connection point of the rim 12 with the spoke is the inner end of the rim 12.

In summary, the radial side of the spoke facing inwards and the radial side of the spoke facing outwards, a certain transition structure is required to make the radial side and the radial side of the spoke transition connected, and in fig. 2, by forming two ring grooves, i.e. the first ring groove 13 and the second ring groove 18 shown in fig. 2, a spoke portion for connecting the radial side and the radial side of the spoke is constructed.

More specifically, the portion of the spoke that is connected to the rim 12 is a first straight spoke, and the portion that is connected to the sheath 16 is an arcuate spoke or a second straight spoke.

Furthermore, the first straight spoke and the bow spoke or the second straight spoke are connected smoothly, accordingly, a first surface of the hub body opposite to the other hub body and a second surface of the same hub body opposite to the first surface are continuously guided curved surfaces and are suitable for die forging forming.

Wherein the bolt hole 19 opens in the first straight spoke.

In the structure shown in fig. 2, the spokes, the cover 16 and the rim 12 form a main body of the hub, and the main body has a cross-sectional shape similar to an S-shape, so that the shear section coefficient of the hub can be effectively enlarged.

In the structure shown in fig. 1, two first straight spokes have a first distance therebetween;

the first distance is 0.15-0.22 times of the axial length of the bearing seat, a centrifugal side part of the cavity 3 is formed between the two first straight spokes, and the overall rigidity of the assembly body, namely the hub, is relatively high.

Further, the outer collar 24 has a second distance between its two end faces, which is greater than the first distance and which is not greater than 0.25 times the axial length of the bearing housing 2. As mentioned above, the outer collar 24 defines the inner end of the sheath 16 and the radial ends of the spokes are connected to the outer end of the sheath 16, thus ensuring that the cavity 3 is relatively large on the radial side and that the assembly formed by the hub 1 is relatively stable on the radial side.

In some embodiments, the spokes are provided with spoke holes, so that the weight can be further reduced.

In addition, the wheel hub body 1 has better toughness under the influence of adopting a forged part instead of a cast part, the probability of deformation is far greater than the probability of breakage when the wheel hub body is subjected to excessive load, after the deformation is generated, the running stability of the roller cage shoe is deteriorated, but accidents caused by breakage and falling of the wheel hub can not be generated, and therefore, the reliability of weight reduction by adopting the spoke holes is far higher than that of the cast part.

In other embodiments, the spokes consist of no less than 3 and no more than 6 spokes. The spoke can be manufactured into a spoke structure before forging and pressing, and the spoke body with a curved surface shape is generated through plastic molding of the die cavity.

Preferably, in the configuration shown in fig. 2, the rim 12 ends with a rim 11 extending radially of the hub to better constrain the rubber wheel 6.

Claims

1. A lightweight roller for use as a roller for a roller can, comprising:

the bolt is used for connecting the two hub bodies;

2. The lightweight roller of claim 1, wherein the end of the body coupled to the spokes is opposite the end positioned by the axial positioning structure.

3. The lightweight wheel according to claim 2, wherein the connection point of the rim to the spoke is the end thereof opposite the other rim.

4. The lightweight roller as set forth in claim 3, wherein the portion of the spokes joined to the rim is a first straight spoke and the portion joined to the sleeve is a bow spoke or a second straight spoke;

wherein, the bolt hole is opened on the first straight spoke body.

5. The lightweight roller as in claim 4, wherein the first spokes have a first distance therebetween;

the first distance is 0.15-0.22 times of the axial length of the bearing seat.

6. The lightweight roller of claim 5, wherein the axial locating structure is an outer collar formed on the outer surface of the bearing housing, having two locating shoulders;

7. The lightweight roller according to any one of claims 1 to 6, wherein the spokes have spoke holes; or

The spokes consist of spokes not less than 3 and not more than 6 in number.

8. The lightweight roller of claim 1, wherein the rim terminates with a rim extending radially of the hub.

9. The light weight roller as claimed in claim 1, wherein a sleeve body of a hub body is welded to the bearing seat;

10. A roller cage shoe comprising the lightweight roller of any one of claims 1 to 9.