CN107269689A - A kind of combination bearing suitable for the dish-shaped traction machine of elevator - Google Patents

Abstract

The present invention relates to field of bearings, a kind of combination bearing suitable for the dish-shaped traction machine of elevator, including bearing inner race, and the clutch shaft bearing outer ring and second bearing outer ring being positioned on the bearing inner race；Close up setting with axial direction of the second bearing outer ring along bearing inner race in the clutch shaft bearing outer ring；Radial direction cylindrical roller component is installed between clutch shaft bearing outer ring and bearing inner race, ball bearing assembly, the ball bearing assembly 4 points of contacts in the radial and axial directions are installed between second bearing outer ring and bearing inner race.It should be noted that 4 points of contacts refer to that ball bearing assembly is positioned along along bearing inner race axial direction two-end-point, and along along bearing inner race radial direction two-end-point with component contact formation.The combination bearing is predominantly used for the machinery such as elevator traction machine and design, and higher and there is the occasion of larger axial load again due to that can bear radial load and axial load, especially rotating speed simultaneously, simply, bearing capacity is very strong for assembly and disassembly.

Description

A Combined Bearing Applicable to Elevator Disc Traction Machine

technical field

The invention relates to the field of bearings, in particular to a combined bearing suitable for an elevator dish-shaped traction machine.

Background technique

A bearing is a component used in a rotating mechanism to support, reduce friction and bear loads. The elevator traction machine is a kind of machinery that needs to adopt large radial load and axial load bearings. At present, a set of deep groove ball bearings and a set of NU-type cylindrical roller bearings are mainly used in China to meet the requirements of working conditions, but the axial The load is difficult to meet the requirements, and the radial load can only barely meet the requirements, and because of the dispersion and concentricity of the inner diameters of the inner rings of the two sets of bearings and the dimensions of the rolling (groove) and the concentricity, the noise of the bearings is relatively large during operation, and the sealing effect of the bearings is low. Also relatively poor.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a combined bearing, which is mainly designed for machinery such as elevator traction machines, because it can bear radial loads and axial loads at the same time, especially when the rotation speed is high and the When there is a large axial load, it is easy to assemble and disassemble, and has a strong bearing capacity.

In order to achieve the above object, the present invention adopts the following technical solutions:

A combined bearing suitable for an elevator dish-shaped traction machine is characterized in that: it includes a bearing inner ring, and a first bearing outer ring and a second bearing outer ring positioned on the bearing inner ring; the first bearing The outer ring and the second bearing outer ring are arranged close together along the axial direction of the bearing inner ring; a radial cylindrical roller assembly is installed between the first bearing outer ring and the bearing inner ring, and a radial cylindrical roller assembly is installed between the second bearing outer ring and the bearing inner ring A ball bearing assembly having four points of contact in radial and axial directions is installed. It should be noted that the four-point contact means that the ball bearing assembly is positioned in contact with the component at both ends in the axial direction of the inner ring of the bearing and at both ends in the radial direction of the inner ring of the bearing.

As a preference, an inner ring raceway surface and an inner ring ball surface are provided on the circumferential outer wall surface of the inner ring of the bearing; the inner end of the inner ring ball surface protrudes from the inner ring raceway surface to form an inner ring retaining wall; The cylindrical roller assembly is installed on the raceway surface of the inner ring, and the ball bearing assembly is installed on the ball surface of the inner ring.

Preferably, the axially outer end of the raceway surface of the inner ring is provided with a tapered surface, and an inner ring oil groove is provided at the junction of the inner end of the raceway surface of the inner ring and the ball surface of the inner ring; the outer ring of the first bearing The inner and outer ends of the axial direction protrude radially inward, and the outer ring retaining wall is provided. The bottom surface of the groove between the outer ring retaining walls on both sides constitutes the outer raceway surface, and the end of the outer raceway surface is connected with the outer ring retaining wall. The outer ring oil groove is formed at the outer ring, and the first outer ring sealing groove is also provided on the outer ring retaining wall on the axial outer side; the outer side of the radial cylindrical roller assembly is positioned on the outer raceway surface, and axially passes through the outer ring retaining wall and the outer end wall positioning.

Preferably, a first sealing ring is provided between the first bearing outer ring and the axially outer end of the bearing inner ring; the first sealing ring includes a first steel skeleton, and a second steel skeleton covering the outside of the first steel skeleton. A sealing body; the radially outer end of the first sealing body snaps into the first outer ring seal groove of the first bearing outer ring, the radially inner end of the first sealing body and the cone of the inner ring raceway surface The radially inner end of the first sealing body includes a first radial sealing lip and a first axial sealing lip, and the first sealing body on the radially outer side of the first radial sealing lip is provided with There is a first elastic slot.

Preferably, the radial cylindrical roller assembly includes a radial cage, and a radial roller set installed on the radial cage; the radial cage includes a ring body, and the side surface of the ring body is regular along its circumference. A plurality of pockets are provided, a connecting beam is arranged between two adjacent pockets, a trapezoidal groove is formed between the connecting beam and the outer wall of the ring body, and an oil storage tank is arranged at the end of the connecting beam in the pocket.

Preferably, the ball surface of the inner ring is provided with an arc groove of the ball of the inner ring; arc groove; the ball bearing assembly is installed in the outer ring ball arc groove.

Preferably, the ball bearing assembly includes an axial radial cage, and a ball set installed in the axial radial cage.

As a preference, the ball arc grooves of the inner ring and the ball arc grooves of the outer ring both include a left groove surface and a right groove surface, and an oil channel at the bottom of the groove is formed between the left groove surface and the right groove surface; The angle α between the side groove surface and the right groove surface and the center line is 35~40°.

Preferably, a second sealing ring is provided between the outer end of the ball surface of the outer ring and the axially outer end of the inner ring ball surface, and the second sealing ring includes a second steel skeleton and a first steel skeleton covering the outside of the second steel skeleton. Two sealing bodies; the radially inner end of the second sealing body includes a second radial sealing lip and two second axial sealing lips, and the second seal on the radially outer side of the second radial sealing lip The body is provided with a second elastic groove, and a third elastic groove is formed between the two second axial sealing lips.

Preferably, a second outer ring sealing groove is provided on the axially outer end of the ball surface of the outer ring, and an inner ring sealing groove is provided on the axially outer end of the inner ring ball surface; the second sealing ring The radially outer end is positioned in the sealing groove of the second outer ring, and the radially inner end of the second sealing ring is positioned in the sealing groove of the inner ring.

The present invention adopts the above-mentioned technical solution, which relates to a composite bearing suitable for an elevator dish-shaped traction machine. The radial cylindrical roller assembly and the ball bearing assembly in the composite bearing share the same inner ring of the bearing, and the radial cylindrical roller assembly The roller assembly is used to ensure the radial bearing capacity of the combined bearing, and the ball bearing assembly is used to ensure the axial bearing capacity of the combined bearing and simultaneously increase the radial bearing capacity. The same inner ring of the bearing makes it easy to install, ensures the dispersion of the inner diameter of the bearing and the concentricity of the rolling (groove) track of the inner ring, reduces the vibration noise of the bearing and improves the service life of the bearing. It can be summarized that the combined bearing has a compact structure, improves coaxiality, runs more stably, and reduces noise.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of the outer ring of the first bearing.

Figure 3 is a schematic structural view of the inner ring of the bearing.

Fig. 4 is a structural schematic diagram of the radial cage.

Fig. 5 is a structural schematic diagram of a radial cage.

Fig. 6 is a schematic structural view of the first sealing ring.

Fig. 7 is a schematic structural diagram of the second bearing outer ring.

Fig. 8 is a schematic structural diagram of the second sealing ring.

detailed description

The preferred embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 8, a combined bearing suitable for an elevator dish-shaped traction machine includes a bearing inner ring 1, and a first bearing outer ring 2 and a second bearing outer ring positioned on the bearing inner ring 1 Circle 3. The first bearing outer ring 2 and the second bearing outer ring 3 are arranged side by side along the axial direction of the bearing inner ring 1 . The inner ring raceway surface 11 and the inner ring ball surface 12 are provided on the circumferential outer wall surface of the bearing inner ring 1, and the inner end of the inner ring ball surface 12 protrudes from the inner ring raceway surface 11 to form an inner ring retaining wall 13. A radial cylindrical roller assembly is installed between the first bearing outer ring 2 and the bearing inner ring 1 , and the radial cylindrical roller assembly is installed on the raceway surface 11 of the inner ring. A ball bearing assembly is installed between the second bearing outer ring 3 and the bearing inner ring 1, the ball bearing assembly is installed on the ball surface 12 of the inner ring, and the ball bearing assembly is in four-point contact in the radial and axial directions. It should be noted that the four-point contact means that the ball bearing assembly is positioned in contact with the component at both ends along the axial direction of the bearing inner ring 1 and at both ends along the radial direction of the bearing inner ring 1 .

The technical solution relates to a combined bearing suitable for elevator dish-shaped traction machines. The radial cylindrical roller assembly and the ball bearing assembly in the combined bearing share the same bearing inner ring 1, and the radial cylindrical roller assembly is used to ensure The radial bearing capacity of the combined bearing, the ball bearing assembly is used to ensure the axial bearing capacity of the combined bearing, and at the same time improve the radial bearing capacity. And sharing a bearing inner ring 1 makes it easy to install, ensures the dispersion of the inner diameter of the bearing and the concentricity of the rolling (groove) track of the inner ring, reduces the vibration noise of the bearing and improves the service life of the bearing. It can be summarized that the combined bearing has a compact structure, improves coaxiality, runs more stably, and reduces noise.

The plan is as follows:

In the positioning structure of the radial cylindrical roller assembly; the axially outer end of the inner ring raceway surface 11 is provided with a tapered surface 14, the cone angle of the tapered surface 14 is 15-17°, and the inner ring raceway surface 11 An inner ring oil groove 15 is provided at the junction of the end portion and the inner ring ball surface 12 . The axially inner and outer ends of the first bearing outer ring 2 protrude radially inward and are provided with outer ring retaining walls 21, and the bottom surface of the groove between the outer ring retaining walls 21 on both sides constitutes an outer raceway surface 22. The connection between the end of the raceway surface 22 and the outer ring blocking wall 21 forms an outer ring oil groove 23 , and a first outer ring sealing groove 24 is also provided on the outer ring blocking wall 21 on the axially outer side. The outer side of the radial cylindrical roller assembly is positioned on the outer raceway surface 22 and axially positioned by the outer ring stop wall 21 and the outer end stop wall. A first sealing ring 4 is provided between the first bearing outer ring 2 and the axially outer end of the bearing inner ring 1 . The first sealing ring 4 includes a first steel skeleton 41 and a first sealing body 42 covering the outside of the first steel skeleton 41 . The radially outer end of the first sealing body 42 snaps into the first outer ring seal groove 24 of the first bearing outer ring 2 , and the radially inner end of the first sealing body 42 and the raceway surface 11 of the inner ring The conical surfaces 14 offset each other. The radial inner end of the first sealing body 42 includes a first radial sealing lip 43 and a first axial sealing lip 44 , and the first sealing body 42 radially outside the first radial sealing lip 43 There is a first elastic groove 45 on it.

The radial cylindrical roller assembly includes a radial cage 51 and a radial roller set 52 mounted on the radial cage 51 . The radial cage 51 includes a ring body 53, the side of the ring body 53 is regularly provided with a plurality of pockets 54 along its circumferential direction, and a connecting beam 55 is arranged between two adjacent pockets 54, and the connecting beam 55 and the ring body A trapezoidal groove 56 is formed between the outer side walls of 53 , and the pocket 54 is provided with an oil storage tank 58 at the end of the connecting beam 55 . The radial cage 51 of the radial cylindrical roller bearing is formed by integral turning and milling of brass material.

In the positioning structure of the ball bearing assembly; the inner ring ball surface 12 is provided with an inner ring ball arc groove. The radial inner surface of the second bearing outer ring 3 is provided with an outer ring ball surface 31 , and the outer ring ball surface 31 is provided with an outer ring ball arc groove. The ball bearing assembly is installed in the ball arc groove of the outer ring. Both the ball arc grooves of the inner ring and the ball arc grooves of the outer ring include a left groove surface 31a and a right groove surface 31b, and a groove bottom oil passage 32 is formed between the left groove surface 31a and the right groove surface 31b. The angle α between the left groove surface 31a and the right groove surface 31b and the center line is 35-40°. The ball bearing assembly includes an axial radial cage 61 and a ball set 62 installed in the axial radial cage 61 .

A second seal ring 7 is provided between the outer ring ball surface 31 and the axially outer end of the inner ring ball face 12, and the second seal ring 7 includes a second steel skeleton 71, and is coated on the second steel skeleton 71 The outer second sealing body 72 . The radially inner end of the second sealing body 72 includes a second radial sealing lip 73 and two second axial sealing lips 74, and the second seal on the radially outer side of the second radial sealing lip 73 The body 72 is provided with a second elastic groove 75 , and a third elastic groove 76 is formed between the two second axial sealing lips 74 . The outer axial end of the outer ring ball surface 31 is provided with a second outer ring sealing groove 34 , and the axial outer end of the inner ring ball surface 12 is provided with an inner ring sealing groove 17 . The radially outer end of the second sealing ring 7 is positioned in the second outer ring sealing groove 34 , and the radially inner end of the second sealing ring 7 is positioned in the inner ring sealing groove 17 .

The assembly process of the combined bearing on the elevator dish-shaped traction machine involved in this scheme is as follows: the first step is to install the radial cylindrical roller bearing; 51 is put into the first bearing outer ring 2 flatly, and then the radial roller sets 52 are put into the pocket holes 54 of the radial cage 51 one by one. The second step is to install the ball bearing assembly; put the second bearing outer ring 3 flatly on the workbench, and then put the bearing inner ring 1 with the side of the sealing groove facing down into the second bearing outer ring 3, And on one side, the inner wall of the inner bearing ring 1 is in contact with the outer wall of the second bearing outer ring 3, and then put in the steel ball that requires one less steel ball in the finished drawing of the wall, and then use the ball clamping machine to load the last steel ball, and then Install the axial and radial cage 61, and then rivet the axial and radial cage 61 on a punch press. The third step is the overall assembly; insert the outer assembly of the previously installed radial cylindrical roller bearing with the side of the sealing groove facing upward into the side of the inner ring with the guide tapered surface 14, then clean the installed bearing, and then use injection seals on both sides of the bearing. The grease machine injects the lubricating grease required by the product, and then presses the first sealing ring 4 on the side of the radial cylindrical roller bearing; finally presses the second sealing ring 7 on the side of the ball bearing assembly. The combined bearing of the lead machine has been assembled.

Claims (10)

1. a kind of combination bearing suitable for the dish-shaped traction machine of elevator, it is characterised in that：Including bearing inner race, and it is positioned at institute State the clutch shaft bearing outer ring and second bearing outer ring on bearing inner race；The clutch shaft bearing outer ring and second bearing outer ring are along bearing The axial direction of inner ring closes up setting；Radial direction cylindrical roller component, second are installed between clutch shaft bearing outer ring and bearing inner race Ball bearing assembly is installed, the ball bearing assembly in the radial and axial directions four between bearing outer ring and bearing inner race Point contact.

2. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 1, it is characterised in that：The axle The outer circumferential wall for holding inner ring is provided with inner ring raceway face and inner ring ball face；The inner end in inner ring ball face protrudes from inner ring Roller surface formation inner ring retaining wall；Radial direction cylindrical roller component is arranged on inner ring raceway face, and ball bearing assembly is arranged on inner ring On ball face.

3. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 2, it is characterised in that：In described The axial outer end portion for enclosing roller surface is provided with the conical surface, and inner ring raceway face inner end is provided with inner ring oil groove with inner ring ball face intersection； The axially inside and outside both ends of the clutch shaft bearing outer ring are radially inwardly projecting to be provided between outer ring retaining wall, the outer ring retaining wall of both sides Groove bottom constitutes outer roller surface, and end and the outer ring retaining wall junction of outer roller surface constitute outer ring oil groove, axially external outer ring The first outer ring seal groove is additionally provided with retaining wall；The outside of the radial direction cylindrical roller component is positioned on outer roller surface, and axially Positioned by outer ring retaining wall and outer end retaining wall.

4. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 3, it is characterised in that：Described The first sealing ring is provided between one bearing outer ring and the axial outer end portion of bearing inner race；First sealing ring includes the first steel skeleton, And it is coated on the first seal on the outside of the first steel skeleton；Its radially outer end of first seal is caught in outside clutch shaft bearing In first outer ring seal groove of circle, the radial inner end and the conical surface in inner ring raceway face of the first seal offset；Described first is close Sealing on the radial inner end of body includes the first radial seal lip and the first axial sealed lip, and the first radial seal lip is radially First seal in outside is provided with the first elastic groove.

5. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to any one in claim 1 ~ 3, it is special Levy and be：The radial direction cylindrical roller component includes radial direction retainer, and the radial roller group on radial direction retainer； The radial direction retainer includes ring body, and ring body side is provided between multiple pocket holes, two neighboring pocket hole along its circumferential rule and is provided with Tie-beam, constitutes trapezoidal groove between tie-beam and ring body lateral wall, pocket hole is provided with oil storage tank in tie-beam end position.

6. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 2, it is characterised in that：In described Enclose ball face and be provided with inner ring ball arc groove；The radially inner side face of the second bearing outer ring is provided with outer ring ball face, outside Enclose ball face and be provided with outer ring ball arc groove；The ball bearing assembly is arranged in the ball arc groove of outer ring.

7. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 6, it is characterised in that：The rolling Pearl bearing assembly includes the ball set in axial-radial retainer, and the axial-radial retainer installed.

8. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 6, it is characterised in that：In described Enclosing ball arc groove and outer ring ball arc groove includes left side groove face and right side groove face, structure between left side groove face and right side groove face Into bottom of trench oil duct；The angle α of the left side groove face and right side groove face and center line is 35 ~ 40 °.

9. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 6, it is characterised in that：It is described outer Enclose and the second sealing ring be provided between ball face and the axial outer end portion in inner ring ball face, the second sealing ring includes the second steel skeleton, And it is coated on the second seal on the outside of the second steel skeleton；Include second on the radial inner end of second seal radially Sealed lip and two the second axial seal lips, the second seal of the second radial seal lip radial outside are provided with second The 3rd elastic groove is constituted between elastic groove, two the second axial seal lips.

10. a kind of combination bearing suitable for the dish-shaped traction machine of elevator according to claim 9, it is characterised in that：It is described The axial outer end portion in outer ring ball face is provided with the second outer ring seal groove, and the axial outer end portion in inner ring ball face is close provided with inner ring Sealing groove；Its radially outer end of second sealing ring is positioned in the second outer ring seal groove, the radial inner end of the second sealing ring It is positioned in inner ring seal groove.