CN217582934U - Bearing block, friction coupling and switch machine - Google Patents

Abstract

The utility model relates to a track traffic equipment field, especially a bearing (1), friction coupling and goat. The plurality of first radiating fins (11) are arranged outside the supporting seat (1) at intervals, so that the contact area between the supporting seat (1) and outside air is increased, and when the supporting seat (1) is driven to rotate by the motor, the plurality of first radiating fins (11) can drive the air around the supporting seat (1) to flow, so that the friction coupler is favorably radiated. Thus, the heat accumulation near the friction pair in the friction coupling can be reduced, and the working performance of the friction coupling and the switch machine can be improved.

Description

Bearing block, friction coupling and switch machine

Technical Field

The utility model relates to a track traffic equipment field, especially a bearing, friction coupling and goat.

Background

During the operation of the electric switch machine, the motor is decelerated by the gear reducer and drives the friction coupler to rotate. The friction connector is connected with the screw rod through a flat key so as to drive the screw rod to rotate, the screw rod drives the nut on the screw rod to move along the axial direction of the screw rod, the nut drives the action rod of the point switch to move, the outer end of the action rod is connected with a point switch point, and the position of the point switch can be converted through the movement of the action rod.

The friction coupling can not only drive the lead screw to rotate, but also play a role in protecting the motor and absorbing the rotational inertia. On one hand, when the switch rail is blocked and can not be switched continuously, the friction coupler can slip in time, so that the motor is not burnt out due to long-term idling; on the other hand, when the control circuit is cut off, the motor connected to it can be gradually stopped by the friction coupling.

Dry friction couplings are the most common type of friction coupling, the main principle of which is overload protection by slipping between the friction pairs. In the case of frequent slipping between the friction pairs, the heat generated by the friction pairs is difficult to dissipate and can lead to rapid temperature increases inside the friction coupling, the coefficient of friction of the friction pairs can be affected at high temperatures, the performance of the friction pairs is affected, and failure of the seals can be caused and the friction coupling can fail.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a bearing, friction coupling and goat, the utility model discloses can realize following purpose:

firstly, the heat generated by the friction pair is promoted to be dissipated when the friction coupler works, so that the influence of the heat generated by the friction pair on the working performance of the friction pair is reduced.

And secondly, the sealing performance of the friction coupling is improved, and the adverse effect on the performance of a friction pair caused by the fact that external oil and dust enter the interior of the friction coupling is prevented.

In a first aspect, in an embodiment of the present invention, the supporting seat for a friction coupling is adapted to be in transmission fit with a motor through an outer periphery of the supporting seat, and the supporting seat is further adapted to be coaxially sleeved with a hub and adapted to be in transmission fit with the hub through a friction pair, so that the supporting seat can be driven by the motor to drive the hub to rotate together; a plurality of first cooling fins are arranged outside the supporting seat at intervals.

Exemplarily, in one aspect, by arranging a plurality of first cooling fins at intervals outside the bearing seat, a contact area of the bearing seat itself with outside air is increased, which is beneficial for cooling the friction coupling. On the other hand, when the motor drives the supporting seat to rotate, the plurality of first radiating fins can drive air around the supporting seat to flow, and the radiating effect on the friction coupler is further improved. Thus, the heat accumulation in the vicinity of the friction pair in the friction coupling can be reduced, and the workability of the friction pair and the friction coupling can be improved.

In an alternative embodiment, the first heat dissipating fins may be in the shape of fan blades, a plurality of the first heat dissipating fins are radially spaced around the axis of the supporting seat, and the plurality of the first heat dissipating fins are arranged to generate an airflow along the axial direction of the supporting seat when rotating with the supporting seat. For example, when the motor drives the bearing block to rotate, the first plurality of fins outside the bearing block cut air at the same time, so that the air can be driven to flow along the axial direction of the bearing block. Since the wind speed on the air outlet side is high, the plurality of first cooling fins may be preferably arranged to blow the wind to the position of the friction pair.

In another alternative embodiment, the first heat sink may protrude radially outward of the support base and extend in a direction parallel to the axis of the support base. Therefore, when the motor drives the supporting seat to rotate, the air flow in the circumferential direction of the supporting seat can be accelerated, and the whole friction coupler can be subjected to a heat dissipation effect.

Preferably, the support block is made of cast aluminum material with good thermal conductivity, which is beneficial to heat dissipation of the friction coupling and improves the working performance of the friction coupling.

In a second aspect, the present invention provides an embodiment of a friction coupling, which comprises a hub, a friction pair and a bearing seat as described in any of the above embodiments. The hub is coaxially sleeved in the supporting seat, and the friction pair is arranged between the supporting seat and the hub, so that the supporting seat can drive the hub to rotate.

For example, a gear may be coaxially disposed outside the supporting seat, and power output by the motor is transmitted to the gear through the speed reducer and drives the supporting seat to rotate around the axis of the supporting seat. The friction pair may include a first friction plate and a second friction plate, the first friction plate may be connected to an inner side of the bearing seat, the second friction plate may be connected to an outer side of the wheel hub, and the first friction plate and the second friction plate are frictionally connected so that the bearing seat can transmit the torque to the wheel hub through the friction pair when rotating. Preferably, the friction pair may comprise two first friction plates and a second friction plate located between the two first friction plates. When the first friction plate and the second friction plate slip, a large amount of heat can be generated, and the friction coupler uses the supporting seat provided with the plurality of first radiating fins, so that the heat generated by the friction pair can be reduced, the heat dissipation effect is good, and the working performance of the friction coupler can be improved.

In a preferred implementation manner of the friction coupling provided in the foregoing embodiment, the friction coupling further includes a bearing flange and a first bearing, where the bearing flange is coaxially sleeved on one end of the hub, which extends out of the supporting seat, and is connected to the first end of the supporting seat; the first bearing is coaxially arranged between the bearing flange and the hub; a plurality of second cooling fins are arranged outside the bearing flange at intervals.

For example, the bearing flange may be used to provide a first bearing to support the hub and meet the requirement that the hub rotate relative to the bearing block when the friction pair slips. The second heat sink may be arranged according to the arrangement of the first heat sink on the support base in the above embodiment. Therefore, the heat radiation effect of the friction coupling is further improved by providing the plurality of second heat radiation fins on the bearing flange, and the workability of the friction coupling can be further improved. Preferably, the bearing flange is made of cast aluminum material with good thermal conductivity, which is favorable for heat dissipation of the friction coupling and improves the working performance of the friction coupling.

In a preferred implementation of the friction coupling provided in the above embodiment, the friction coupling further includes a first seal ring and a second seal ring, the first seal ring is coaxially disposed between the outer ring of the first bearing and the bearing flange, and the second seal ring is coaxially disposed between the inner ring of the first bearing and the hub. For example, the first bearing may be selected as a deep groove ball bearing, a first annular groove may be formed in an inner wall of the bearing flange and a first seal ring may be sleeved therein, and a second annular groove may be formed in an outer wall of the wheel hub and a second seal ring may be sleeved therein, so as to achieve sealing between the first bearing and the bearing flange as well as between the first bearing and the wheel hub, and to better prevent oil and dust from entering the friction coupler through a connection portion between the second bearing and the bearing flange as well as between the first bearing and the wheel hub.

Preferably, the friction coupler further comprises a third sealing ring coaxially arranged between the inner wall of the bearing flange and the outer wall of the supporting seat, wherein one end of the bearing flange, which is close to the supporting seat, is coaxially sleeved outside the supporting seat. For example, a third annular groove may be formed in the inner wall of the bearing flange, and the third seal ring may be sleeved therein, so as to achieve sealing between the bearing flange and the support seat, and to better prevent oil and dust from entering the interior of the friction coupling through the joint between the bearing flange and the support seat.

Preferably, the friction coupling further comprises a fourth sealing ring coaxially disposed on an end surface of the connection hole of the bearing flange, and a screw may be inserted through the fourth sealing ring and the connection hole to connect the bearing flange to one end of the bearing housing. For example, when the bearing flange is coupled to the support base by a plurality of screws, the fourth seal ring can seal the screw and the bearing flange, and oil and dust can be prevented from entering the friction coupling through the joint between the screw and the bearing flange.

In a preferred embodiment of the friction coupling provided in the above embodiment, the friction coupling further comprises a second bearing and fifth and sixth seal rings; the second bearing is arranged at one end of the hub, which is far away from the first bearing, and is positioned between the outer wall of the hub and the inner wall of the supporting seat; the fifth sealing ring is arranged between the outer ring of the second bearing and the supporting seat, and the sixth sealing ring is arranged between the inner ring of the second bearing and the wheel hub. For example, a fifth annular groove may be formed in the inner wall of the bearing seat at a position where the second bearing is installed, and a fifth sealing ring is sleeved in the fifth annular groove, so as to seal between the second bearing and the bearing seat. For another example, a sixth annular groove may be formed in the outer wall of the hub at a position where the second bearing is mounted, and the sixth sealing ring is sleeved therein to seal between the second bearing and the hub. Thus, oil and dust can be prevented from entering the interior of the friction coupling through the joint of the second bearing, the bearing seat and the hub.

In a preferred embodiment of the friction coupling provided in the above embodiment, the second axial end of the supporting seat is formed with an annular mounting cavity, the opening of the mounting cavity faces the outer axial end of the supporting seat, and the friction coupling further includes an adjusting end cap, and one axial end of the adjusting end cap is formed with a connecting pipe in threaded connection with the mounting cavity. Illustratively, the supporting seat is provided with a plurality of guide holes at intervals in the circumferential direction between the bottom wall of the mounting cavity and the friction pair, each guide hole is internally provided with a spring and a guide post, one end of each spring abuts against a first friction sheet of the friction pair, the other end of each spring abuts against the corresponding guide post, and the other end of each guide post extends out of the corresponding guide hole and abuts against a connecting pipe of the adjusting end cover. Therefore, when the distance between the adjusting end cover and the friction pair is changed, the elastic force of the spring is changed, and the adjustment of the friction torque between the first friction plate and the second friction pair of the friction pair is realized. When the friction torque or the friction force between the first friction plate and the second friction plate reaches a set value, the first friction plate and the second friction plate can slip due to the continuous driving of the motor.

Optionally, the friction coupling further includes a seventh sealing ring and an eighth sealing ring, the seventh sealing ring is disposed between the inner wall of the connecting pipe and one side wall of the mounting cavity, and the eighth sealing ring is disposed between the outer wall of the connecting pipe and the other side wall of the mounting cavity. For example, the inner wall of the connecting pipe of the adjusting end cover may be provided with a seventh annular groove, and the seventh sealing ring is sleeved therein, and the outer wall of the connecting pipe may be provided with an eighth annular groove, and the eighth sealing ring is sleeved therein, so as to realize sealing between the adjusting end cover and the supporting seat, and to better prevent oil and dust from entering the friction coupler through the joint of the adjusting end cover and the supporting seat.

In a third aspect, the present invention provides an embodiment of a switch machine, wherein the switch machine comprises the friction connector described in any one of the above embodiments. For example, in a switch machine, a motor, a lead screw, a nut, an action rod, and the like are usually included, and in an exemplary operation process of the switch machine, the motor drives the friction coupling to rotate, so as to drive the lead screw to rotate, the nut converts the rotation of the lead screw into a linear motion and drives the action rod to move, and when the action rod moves, the switch point can be driven to move to switch the position of the switch.

The utility model discloses a bearing to friction connector improves, is provided with a plurality of first fin in the outside of bearing still at the interval, can reduce the thermal gathering that the vice production of friction has better radiating effect to improve the working property of the vice and friction coupling of friction, and further improved the working property of goat. In addition, since the switch machine of the present embodiment includes the friction coupling of any of the above embodiments, the switch machine also has the corresponding advantages brought by the friction coupling.

Drawings

The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings, in which:

fig. 1 is a schematic view of an external structure of a friction connector according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a friction connector according to an embodiment of the present invention.

Wherein the reference numbers are as follows:

1-support base 11-first radiating fin 2-hub

31-first bearing 32-second bearing 41-first friction plate

42-second friction plate 5-gear 6-bearing flange

61-second heat sink 62-screw 7-adjusting end cap

71-spring 72-guide post 81-first sealing ring

82-second sealing ring 83-third sealing ring 84-fourth sealing ring

85-fifth sealing ring 86-sixth sealing ring 87-seventh sealing ring

88-eighth sealing ring

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail by referring to the following embodiments.

The present invention will be described with reference to a friction coupling shown in fig. 1 and 2 as an example of a support base 1 for a friction coupling, and a switch machine having the friction coupling. The utility model discloses can realize following purpose: firstly, the heat generated by the friction pair is dissipated when the friction coupling works, so that the influence of the heat generated by the friction pair on the working performance of the friction pair is reduced. And secondly, the sealing performance of the friction coupler is improved, and the adverse effect on the performance of a friction pair caused by the fact that external oil and dust enter the interior of the friction coupler is prevented.

Taking as an example the friction coupling shown in fig. 1, the friction coupling comprises a bearing block 1 and a hub 2, the bearing block 1 being in driving engagement with a motor via its outer periphery, and a gear wheel 5 being coaxially arranged outside the bearing block 1 in fig. 1. For example, a plurality of bolts may fasten the gear 5 to the support block 1 through an end face on the gear 5, so that the motor may drive the support block 1 to rotate about its axis by means of the gear 5. The hub 2 is coaxially sleeved inside the supporting seat 1, the supporting seat 1 and the hub 2 are connected through a friction pair for transmission fit, and when the motor drives the supporting seat 1 to rotate, the hub 2 can be driven to rotate through the friction pair.

As shown in fig. 2, the friction pair may include a first friction plate 41 and a second friction plate 42, the first friction plate 41 may be connected to the inner side of the support base 1, the second friction plate 42 may be connected to the outer side of the hub 2, and the first friction plate 41 and the second friction plate 42 are frictionally connected so that the support base 1 can transmit torque to the hub 2 through the friction pair when rotating. Preferably, the friction pair may include two first friction plates 41 and one second friction plate 42 located between the two first friction plates 41. A large amount of heat is generated when the first friction plate 41 and the second friction plate 42 slip.

Furthermore, a plurality of first cooling fins 11 are arranged outside the supporting base 1 at intervals. On one hand, the plurality of first cooling fins 11 are arranged outside the supporting seat 1 at intervals, so that the contact area of the supporting seat 1 and the outside air is increased, and the heat dissipation of the friction coupler is facilitated. On the other hand, when the motor drives the supporting seat 1 to rotate, the plurality of first heat dissipation fins 11 drive the air around the supporting seat 1 to flow, and the heat dissipation effect on the friction coupler is further improved. Therefore, since the friction coupling uses the support base provided with the plurality of first heat radiating fins 11, it is possible to reduce the heat accumulation generated by the friction pair and have a good heat radiating effect, and to improve the working performance of the friction pair and the friction coupling. Preferably, the support block 1 can be made of cast aluminum, which has a good thermal conductivity, and is also advantageous for dissipating heat of the friction coupling itself and improving the operating performance of the friction coupling.

In an alternative embodiment, as shown in fig. 1, a plurality of first cooling fins 11 are radially spaced around the axis of the supporting base 1 on the supporting base 1, and the first cooling fins 11 extend outward in the radial direction of the supporting base 1 and extend in a direction parallel to the axis of the supporting base 1. In this way, when the motor drives the bearing base 1 to rotate, the air flow in the circumferential direction of the bearing base 1 can be accelerated, and the heat dissipation effect on the whole friction coupling can be achieved.

Furthermore, in another alternative embodiment, the plurality of first cooling fins 11 on the supporting base 1 may be in a fan blade shape, the plurality of first cooling fins 11 are radially spaced around the axis of the supporting base 1, and the plurality of first cooling fins 11 are arranged to generate an airflow along the axial direction of the supporting base 1 when rotating with the supporting base 1. For example, when the motor drives the bearing block 1 to rotate, the plurality of first fins 11 outside the bearing block 1 cut air at the same time, so that the air can be driven to flow along the axial direction of the bearing block 1. Since the wind speed on the wind outlet side is high, the plurality of first heat dissipation fins 11 may be preferably arranged to blow the wind to the location of the friction pair.

With reference to fig. 1 and 2, the friction coupling further includes a bearing flange 6 and a first bearing 31, wherein the bearing flange 6 is coaxially sleeved on one end of the wheel hub 2 extending out of the supporting seat 1 and is connected with the first end of the supporting seat 1; the first bearing 31 is arranged coaxially between the bearing flange 6 and the wheel hub 2. Illustratively, one end of the bearing flange 6 close to the bearing seat 1 is coaxially sleeved outside the bearing seat 1, and a plurality of connecting holes are arranged at intervals on the periphery of the axial end face of the bearing flange 6, and the bearing flange 6 can be connected to the end face of the bearing seat 1 by a plurality of screws 62. Thus, the bearing flange 6 may be used to provide the first bearing 31 to support the hub 2 and meet the requirement that the hub 2 rotate relative to the support block 1 when the first and second friction plates 41, 42 of the friction pair slip.

As shown in fig. 1, a plurality of second cooling fins 61 are further provided at intervals outside the bearing flange 6, wherein the second cooling fins 61 may be provided in accordance with the manner of providing the first cooling fins 11 on the support base 1 in the above-described embodiment. The provision of the plurality of second cooling fins 61 on the bearing flange 6 further improves the heat dissipation effect of the friction coupling, and thus the workability of the friction coupling can be improved. Preferably, the bearing flange 6 is made of cast aluminum, which has a good thermal conductivity, and is also advantageous for dissipating heat from the friction coupling itself and improving the operating performance of the friction coupling.

Preferably, referring to fig. 2, the friction coupling further comprises a first sealing ring 81 and a second sealing ring 82, the first sealing ring 81 being coaxially arranged between the outer ring of the first bearing 31 and the bearing flange 6, the second sealing ring 82 being coaxially arranged between the inner ring of the first bearing 31 and the wheel hub 2. For example, the first bearing 31 may be selected as a deep groove ball bearing, and a first annular groove may be provided on the inner wall of the bearing flange 6 and the first sealing ring 81 may be sleeved therein to achieve sealing between the first bearing 31 and the bearing flange 6. And, can also set up the second annular groove on the outer wall of the wheel nave 2 and set up the second seal ring 82 among them, in order to realize the sealed between first bearing 31 and wheel nave 2, can prevent oil and dust from entering the friction coupling inside through the junction of second bearing 32 and bearing flange 6 and wheel nave 2 well.

Preferably, the friction coupling further comprises a third sealing ring 83, which is coaxially arranged between the inner wall of the bearing flange 6 and the outer wall of the bearing block 1. For example, because one end of the bearing flange 6 close to the bearing seat 1 is coaxially sleeved outside the bearing seat 1, a third annular groove may be formed in the inner wall of the bearing flange 6 and a third seal ring 83 is sleeved therein, so as to achieve sealing between the bearing flange 6 and the bearing seat 1, and to better prevent oil and dust from entering the friction coupling through the joint between the bearing flange 6 and the bearing seat 1.

Preferably, the friction coupling further comprises a fourth sealing ring 84 coaxially disposed on an end surface of the coupling hole of the bearing flange 6 and allowing the screw 62 to pass through the fourth sealing ring 84 and the coupling hole to couple the bearing flange 6 to one end of the bearing housing 1. In this way, when the bearing flange 6 is connected to the support housing 1 by the plurality of screws 62, the fourth seal 84 can seal between the screws 62 and the bearing flange 6, and oil and dust can be prevented from entering the friction coupling through the connection points between the screws 62 and the bearing flange 6.

In a preferred embodiment of the friction coupling provided in the above embodiment, the friction coupling further comprises the second bearing 32 and the fifth and sixth sealing rings 85, 86. Wherein the second bearing 32 is arranged at the end of the hub 2 remote from the first bearing 31 and between the outer wall of the hub 2 and the inner wall of the bearing block 1. A fifth seal 85 is provided between the outer ring of the second bearing 32 and the support seat 1, and a sixth seal 86 is provided between the inner ring of the second bearing 32 and the hub 2. For example, the inner wall of the bearing seat 1 may be provided with a fifth annular groove at the position where the second bearing 32 is installed and a fifth sealing ring 85 is sleeved therein to realize sealing between the second bearing 32 and the bearing seat 1. For another example, a sixth annular groove may be formed on the outer wall of the hub 2 at a position where the second bearing 32 is installed, and a sixth sealing ring 86 is sleeved therein to seal between the second bearing 32 and the hub 2. In this way, it is possible to better prevent oil and dust from entering the interior of the friction coupling through the connection of the second bearing 32 with the bearing block 1 and the hub 2.

In a preferred embodiment of the friction coupling provided in the above embodiment, the second axial end of the bearing block 1 is formed with an annular mounting cavity, the opening of which faces the outer axial end of the bearing block 1, and the friction coupling further comprises an adjusting end cap 7, and one axial end of the adjusting end cap 7 is formed with a connecting pipe in threaded connection with the mounting cavity. For example, the supporting seat 1 is provided with a plurality of guide holes at intervals in the circumferential direction between the bottom wall of the mounting cavity and the friction pair, each guide hole is provided with a spring 71 and a guide post 72, one end of the spring 71 abuts against the first friction plate 41 of the friction pair, the other end of the spring 71 abuts against the guide post 72, and the other end of the guide post 72 extends out of the guide hole and abuts against the connecting pipe of the adjusting end cover 7. In this way, when the distance between the adjusting end cover 7 and the friction pair is changed, the elastic force of the spring 71 is also changed, so that the friction torque between the first friction plate 41 and the second friction pair of the friction pair is adjusted. When the friction torque or the friction force between the first friction plate 41 and the second friction plate 42 reaches a set value, the first friction plate 41 and the second friction plate 42 slip due to the continuous driving of the motor.

Optionally, the friction coupling further comprises a seventh sealing ring 87 and an eighth sealing ring 88, the seventh sealing ring 87 being arranged between the inner wall of the connecting tube and one side wall of the mounting chamber, and the eighth sealing ring 88 being arranged between the outer wall of the connecting tube and the other side wall of the mounting chamber. For example, the inner wall of the connecting pipe of the adjusting end cap 7 may be provided with a seventh annular groove and the seventh sealing ring 87 is sleeved therein, and the outer wall of the connecting pipe may be provided with an eighth annular groove and the eighth sealing ring 88 is sleeved therein, so as to realize the sealing between the adjusting end cap 7 and the supporting seat 1, and to better prevent oil and dust from entering the interior of the friction coupling through the joint between the adjusting end cap 7 and the supporting seat 1.

In an embodiment of a switch machine provided by the present invention, the switch machine comprises the friction connector in any one of the above embodiments. For example, in a switch machine, a motor, a lead screw, a nut, an action rod, and the like are usually included, and in an exemplary operation process of the switch machine, the motor drives the friction coupling to rotate, so as to drive the lead screw to rotate, the nut converts the rotation of the lead screw into a linear motion and drives the action rod to move, and when the action rod moves, the switch point can be driven to move to switch the position of the switch.

Further, when the point rail is blocked and can not be switched continuously, the action rod of the switch machine stops moving and the hub 2 stops rotating, and when the supporting seat 1 is driven by the motor to rotate continuously, the first friction plate 41 and the second friction plate 42 of the friction pair can slip and generate a large amount of heat. The utility model discloses a bearing 1 to friction connector improves, is provided with a plurality of first fin 11 still at the interval in bearing 1's outside, can reduce the thermal gathering that the vice production of friction has better radiating effect to improve the working property of the vice and friction coupling of friction, and further improved the working property of goat. In addition, since the switch machine of this embodiment includes the friction coupling in any of the above embodiments, and also has the corresponding advantages brought by the friction coupling, it is not described herein again.

The utility model relates to a track traffic equipment field, especially a bearing 1, friction coupling and goat. The plurality of first radiating fins 11 are arranged outside the supporting seat 1 at intervals, so that the contact area between the supporting seat 1 and the outside air is increased, and when the supporting seat 1 is driven by the motor to rotate, the plurality of first radiating fins 11 can drive the air around the supporting seat 1 to flow, so that the heat dissipation of the friction coupler is facilitated. Thus, the heat accumulation near the friction pair in the friction coupling can be reduced, and the working performance of the friction coupling and the switch machine can be improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A supporting seat for a friction coupler is characterized in that the supporting seat (1) can be in transmission fit with an electric motor through the periphery of the supporting seat, the supporting seat (1) can also be provided with a hub (2) which is coaxially sleeved in the supporting seat, and the supporting seat is in transmission fit with the hub (2) through a friction pair, so that the supporting seat can drive the hub to rotate together under the driving of the electric motor; the method is characterized in that: a plurality of first radiating fins (11) are arranged outside the supporting seat (1) at intervals.

2. The bearing block according to claim 1, characterized in that the first cooling fins (11) are fan-shaped, and that a plurality of the first cooling fins (11) are arranged to generate an air flow in the axial direction of the bearing block (1) when rotating with the bearing block (1).

3. The backup pad according to claim 1, characterized in that the first plurality of fins (11) are radially spaced around the axis of the backup pad (1).

4. Backup pad according to claim 1, characterized in that the first cooling fins (11) extend radially outwards of the backup pad (1) and extend in a direction parallel to the axis of the backup pad (1).

5. A friction coupling, characterized in that it comprises a bearing block (1) according to any one of claims 1 to 4; the friction coupling further includes:

the hub (2) is coaxially sleeved in the supporting seat (1);

and the friction pair is arranged between the supporting seat (1) and the hub (2) so that the supporting seat (1) can drive the hub to rotate.

6. The friction coupling of claim 5, further comprising:

the bearing flange (6) is coaxially sleeved at one end, extending out of the supporting seat (1), of the hub (2) and is connected with the first end of the supporting seat (1);

a first bearing (31) arranged coaxially between the bearing flange (6) and the hub (2);

a plurality of second cooling fins (61) are arranged outside the bearing flange (6) at intervals.

7. The friction coupling of claim 6, further comprising:

a first sealing ring (81) and a second sealing ring (82), wherein the first sealing ring (81) is coaxially arranged between the outer ring of the first bearing (31) and the bearing flange (6), and the second sealing ring is coaxially arranged between the inner ring of the first bearing (31) and the wheel hub (2); or,

the bearing device is characterized by further comprising a third sealing ring (83) which is coaxially arranged between the inner wall of the bearing flange (6) and the outer wall of the supporting seat (1), wherein one end, close to the supporting seat (1), of the bearing flange (6) is coaxially sleeved outside the supporting seat (1); or,

the bearing flange sealing device is characterized by further comprising a fourth sealing ring (84) which is coaxially arranged on the end face of the connecting hole of the bearing flange (6) and can be used for enabling a screw to penetrate through the fourth sealing ring (84) and the connecting hole to connect the bearing flange (6) to one end of the supporting seat (1).

8. The friction coupling of claim 6, further comprising:

a second bearing (32) arranged at one end of the hub (2) remote from the first bearing (31) and between the outer wall of the hub (2) and the inner wall of the bearing block (1);

the bearing support comprises a fifth sealing ring (85) and a sixth sealing ring (86), wherein the fifth sealing ring (85) is arranged between the outer ring of the second bearing (32) and the support seat (1), and the sixth sealing ring (86) is arranged between the inner ring of the second bearing (32) and the wheel hub (2).

9. Friction coupling according to claim 5, characterized in that the second axial end of the bearing block (1) is formed with an annular mounting cavity opening towards the outer axial end of the bearing block (1), the friction coupling further comprising:

an adjusting end cover (7), wherein a connecting pipe in threaded connection with the mounting cavity is formed at one axial end of the adjusting end cover;

seventh sealing washer (87) and eighth sealing washer (88), seventh sealing washer (87) set up the inner wall of connecting pipe with between a lateral wall of installation cavity, eighth sealing washer (88) set up the outer wall of connecting pipe with between another lateral wall of installation cavity.

10. A switch machine, characterized in that it comprises a friction coupling as claimed in any one of claims 5 to 9.

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