CN212050029U

CN212050029U - Large-tonnage goods elevator

Info

Publication number: CN212050029U
Application number: CN202020618770.3U
Authority: CN
Inventors: 李生惠; 袁文成; 苟庭明
Original assignee: Schmidt Elevator Co ltd
Current assignee: Schmidt Elevator Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-12-01
Anticipated expiration: 2030-04-22

Abstract

The utility model provides a large-tonnage goods lift, include: the car, the sedan-chair door, install bin and operating panel, install the sedan-chair door that is used for the switching car on the car, it has the install bin to articulate on the car wall, install operating panel in the install bin, the mounting hole has been seted up on the install bin surface, the mounting hole is by the orifice plate switching, the orifice plate passes through locking equipment with the installation tank wall and can dismantle the connection, it changes the equipment to install elasticity limit at the articulated department of install bin and car wall, be provided with first elastic component in the elasticity limit changes the equipment, can keep elasticity limit to change equipment under the first elastic component elasticity and allow the install bin to call the car rotatory relatively, install spacing equipment on the orifice plate, spacing equipment is used for making elasticity limit to change equipment limit the relative car rotation of install bin when the trompil. The large-tonnage goods lift solves the problem that in the prior art, the installation box can be allowed to rotate relative to the lift car only by manually adjusting devices except a locking device and an opening and closing plate, so that the operation is troublesome.

Description

Large-tonnage goods elevator

Technical Field

The utility model relates to an elevator, concretely relates to large-tonnage goods lift.

Background

In the prior art, elevators comprise: the car, install bin and operating panel, the other articulated install bin that has of car door, the install bin is close to one side opening of sedan-chair door, install operating panel in the install bin, button on the operating panel deviates from sedan-chair door one side from the install bin and emits, the convenient operating panel's of install bin installation, though set up the hole that communicates to operating panel on the install bin, and the hole is opened and close by the switching board, the switching board adopts locking device locking with the install bin, but locking device and switching board do not have any relation with the articulated of install bin, can not open the switching board just can rotate the install bin, also can not realize that the switching board closes the hole and just restricts the relative car rotation of install bin, need to adjust other device and allow the relative car rotation of install bin, lead to the troublesome poeration.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a large-tonnage goods lift needs the manual regulation to remove locking device and switching board device among the solution prior art and just can allow the relative car rotation of install bin and lead to troublesome poeration's problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a large-tonnage goods lift, include: the car, the sedan-chair door, install mounting box and operating panel, install the sedan-chair door that is used for the switching car on the car, it has the mounting box to articulate on the sedan-chair wall, the mounting box is located sedan-chair door inboard, install operating panel in the mounting box, button spills from the mounting box surface on the operating panel, the mounting hole has been seted up on the mounting box surface, the mounting hole is by the orifice plate switching, the orifice plate can be dismantled with the installation tank wall through locking device and be connected, elasticity limit equipment is installed at the articulated department of mounting box and sedan-chair wall, be provided with first elastic component in the elasticity limit equipment, can keep elasticity limit equipment under the first elastic component elasticity to rotate the relative car rotation of mounting box, install spacing equipment on the orifice plate, spacing equipment is used for making elasticity limit equipment to rotate relative car of mounting box when the orifice plate closes.

Preferably, the elastic rotation-limiting device comprises: the elevator car limiting device comprises a limiting rod, an extrusion head and a first spring, wherein a fixed shaft is fixed relative to a car, a rotating ring is fixed relative to an installation box, the rotating ring is sleeved outside the fixed shaft and can rotate relative to the fixed shaft, the extrusion head is located in an installation hole, the extrusion head is connected to one end of the first spring, the first spring is a first elastic piece, the other end of the first spring is fixed to the inner wall of the installation hole, one end of the limiting rod is fixed with the extrusion head, and the other end of the limiting rod is used for being inserted into the fixed shaft.

Preferably, the spacing device comprises: the inserted bar, the inserted bar is fixed with the orifice plate inside wall, and the extrusion head is seted up and is supplied inserted bar male jack, the first compressive plane of jack one side inner wall, is formed with the second compressive plane on the inserted bar, and the second compressive plane is used for hugging closely with first compressive plane, and the inserted bar is used for making the rotation limiting rod insert in the fixed axle through the first compressive plane of second compressive plane extrusion.

Preferably, the locking device includes: the rotary disk, the apparatus further comprises a rotating shaft, the gyro wheel, the locking lever, wind spring and third spring, the rotary disk is oval structure, be fixed with the pivot that emerges the orifice plate outside on the rotary disk, offer the lockhole that is used for inserting the key in the pivot, the rotary disk is fixed to the wind spring outer end, wind spring inner is fixed to the connecting axle, the connecting axle is fixed with the orifice plate, the rotary disk is tangent with the gyro wheel, the gyro wheel can the pivoted install in locking lever one end, the locking lever other end is used for inserting to the spacing downthehole that the mounting hole inner wall was seted up, the locking lever is fixed to third.

Preferably, the large-tonnage freight elevator further comprises: the elevator comprises a traction rope and elevator guiding equipment, wherein the traction rope is used for lifting the car, and the elevator guiding equipment is used for guiding the traction rope.

Preferably, the elevator guiding apparatus includes: wheel body, the center pin, antifriction bearing, the end cover, mounting bracket and elasticity indicating device, the wheel body center is passed by antifriction bearing, antifriction bearing installs outside the center pin, be connected with the both ends cover respectively at antifriction bearing both ends, each end cover is all passed by the center pin, the center pin is installed on the mounting bracket, the center pin is located the horizontal direction, install elasticity indicating device in the junction of end cover and center pin, be provided with the second elastic component in the elasticity indicating device, can keep elasticity indicating device to be in the state that restriction center pin and mounting bracket are connected under second elastic component elasticity, elasticity indicating device is used for allowing the center pin to be connected with the mounting bracket after the end cover effect.

Compared with the prior art, the utility model discloses following beneficial effect has:

through setting up elasticity limit rotation equipment, realized keeping elasticity limit rotation equipment to be in the position that allows the installation box rotatory relative to the car under first elastic component elasticity, thereby realized elasticity limit rotation equipment automatic release installation box, realized through setting up spacing equipment that the orifice plate is automatic extrusion elasticity limit rotation equipment restriction installation box rotatory relative to the car after closing the mounting hole, also need not manual regulation elasticity limit rotation equipment to keep restricting the position that the installation box rotatory relative to the car, operation steps have been reduced, the maintenance and the installation have been made things convenient for, locking device has realized locking the orifice plate on the installation box, avoided the people to beat the orifice plate at will, the installation box rotates at will, avoid dismantling operating panel at will.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a cross-sectional view of a car in a large tonnage freight elevator;

FIG. 2 is an enlarged view at B in FIG. 1;

FIG. 3 is an enlarged view of the hole plate of FIG. 2;

FIG. 4 is a cross-sectional view of an elevator guide apparatus in a large tonnage freight elevator;

fig. 5 is an enlarged view of a portion a in fig. 4.

Reference numerals: the elevator car door locking device comprises a wheel body 1, a central shaft 2, a first cylinder 21, a second cylinder 22, a third cylinder 23, a central cylinder 24, a rolling bearing 3, an end cover 4, a mounting frame 5, a top frame 51, a suspension frame 52, an elastic indicating device 6, a second spring 61, a first mounting ring 611, a second mounting ring 612, a telescopic body 613, a sliding block 62, an extrusion block 63, an indicating rod 64, a first insertion rod 71, a second insertion rod 72, a guide limiting device 73, a guide rod 731, a screw 732, a car 81, a car door 82, a mounting box 83, an operation panel 84, an elastic rotation limiting device 85, a rotation limiting rod 851, an extrusion head 852, a first spring 853, a limiting device 86, a locking device 87, a rotating disk 871, a rotating shaft 872, a roller 873, a locking rod 874, a coil spring 875, a third spring 876, a hole plate 88, a fixed shaft 89 and a rotating ring.

Detailed Description

In order to make the utility model realize that technical means, creation characteristics, achievement purpose and effect are clearer and easily understand, it is right to combine below the figure and the detailed implementation mode the utility model discloses do further explanation:

example 1:

as shown in fig. 1 to 3, the utility model provides a large-tonnage goods lift, include: a car 81, a door 82, a mounting box 83 and an operation panel 84, wherein the door 82 for opening and closing the car 81 is mounted on the car 81, an installation box 83 is hinged on the wall of the lift car 81, the installation box 83 is positioned on the inner side of the lift car door 82, an operation panel 84 is installed in the installation box 83, keys on the operation panel 84 leak out from the surface of the installation box 83, an installation hole is formed in the surface of the installation box 83, the installation hole is opened and closed by a pore plate 88, the pore plate 88 is detachably connected with the wall of the installation box 83 through a locking device 87, an elastic rotation limiting device 85 is arranged at the hinged joint of the installation box 83 and the wall of the lift car 81, a first elastic member is arranged in the elastic rotation limiting device 85, the elastic rotation limiting device 85 can be kept under the elastic force of the first elastic member to allow the installation box 83 to rotate relative to the lift car 81, a limiting device 86 is mounted on the orifice plate 88, and the limiting device 86 is used for enabling the elastic rotation limiting device 85 to limit the rotation of the mounting box 83 relative to the car 81 when the orifice plate 88 closes the opening.

In order to design the elastic rotation-limiting device 85 having a simple structure, the elastic rotation-limiting device 85 includes: the elevator car comprises a rotation limiting rod 851, an extrusion head 852 and a first spring 853, wherein a fixed shaft 89 is fixed relative to a car 81, a rotating ring 80 is fixed relative to a mounting box 83, the rotating ring 80 is sleeved outside the fixed shaft 89, the rotating ring 80 can rotate relative to the fixed shaft 89, the extrusion head 852 is positioned in a mounting hole, the extrusion head 852 is connected to one end of the first spring 853, the first spring 853 is a first elastic piece, the other end of the first spring 853 is fixed to the inner wall of the mounting hole, one end of the rotation limiting rod 851 is fixed with the extrusion head 852, and the other end of the rotation limiting rod 851 is inserted into the fixed shaft 89.

In order to design the limiting device 86 with a simple structure, it is realized that the limiting device 86 can be rotated with the elastic limiting device 85, and the limiting device 86 includes: the inserted bar, the inserted bar is fixed with orifice plate 88 inside wall, and extrusion head 852 has seted up and has supplied inserted bar male jack, the first compressive plane of jack one side inner wall, is formed with the second compressive plane on the inserted bar, and the second compressive plane is used for hugging closely with first compressive plane, and the inserted bar is used for making in limit turning lever 851 inserts fixed axle 89 through the first compressive plane of second compressive plane extrusion.

In order to design the locking device 87 with a simple structure, and realize that the rotation shaft 872 can be rotated to realize the adjustment of the locking device 87 after the key is inserted, the locking device 87 comprises: the rotary disc 871 is of an oval structure, the rotary disc 871 is fixedly provided with the rotary shaft 872 protruding out of the pore plate 88, the rotary shaft 872 is provided with a locking hole for inserting a key, the rotary disc 871 is fixed at the outer end of the coil spring 875, the inner end of the coil spring 875 is fixed to a connecting shaft, the connecting shaft is fixed with the pore plate 88, the rotary disc 871 is tangent to the roller 873, the roller 873 can be rotatably arranged at one end of the locking bar 874, the other end of the locking bar 874 is inserted into a limiting hole formed in the inner wall of the mounting hole, the locking bar 874 is fixed at one end of the third spring 876, and the other end of the third spring 876 is fixed to the inner wall of the mounting hole. Two sets of the roller 873, the lock lever 874 and the third spring 876 are respectively disposed on two sides of the rotating disc 871, and the rotating disc 871 has an elliptical structure. The wide edge of the rotating disk 871 can be kept tangent to the roller 873 by the elastic force of the coil spring 875, thereby keeping the locking rod 874 inserted into the locking hole. When the rotating shaft 872 is rotated, the narrow edge of the rotating disc 871 is tangent to the roller 873, and the locking rod 874 can be disengaged from the locking hole under the elastic force of the third spring 876.

In order to realize that the traction rope smoothly pulls the elevator to lift, the large-tonnage freight elevator further comprises: a traction rope for lifting the car 81 and an elevator guiding device for guiding the traction rope.

Preferably, the elevator guiding apparatus includes: wheel body 1, center pin 2, antifriction bearing 3, end cover 4, mounting bracket 5 and elasticity indicating device 6, wheel body 1 center is passed by antifriction bearing 3, antifriction bearing 3 installs outside center pin 2, be connected with both ends cover 4 respectively at antifriction bearing 3 both ends, each end cover 4 all is passed by center pin 2, center pin 2 installs on mounting bracket 5, center pin 2 is located the horizontal direction, install elasticity indicating device 6 in the junction of end cover 4 and center pin 2, be provided with the second elastic component in the elasticity indicating device 6, can keep elasticity indicating device 6 to be in the state that restriction center pin 2 is connected with mounting bracket 5 under second elastic component elasticity, elasticity indicating device 6 is used for allowing center pin 2 to be connected with mounting bracket 5 after the effect with end cover 4.

Example 2:

this example differs from example 1 in that: the embodiment only improves the elevator guiding device on the basis of the embodiment 1, and other structures are unchanged.

As shown in fig. 4 and 5, the elevator guiding apparatus includes: wheel body 1, center pin 2, antifriction bearing 3, end cover 4, mounting bracket 5 and elasticity indicating device 6, wheel body 1 center is passed by antifriction bearing 3, antifriction bearing 3 installs outside center pin 2, be connected with both ends cover 4 respectively at antifriction bearing 3 both ends, each end cover 4 all is passed by center pin 2, center pin 2 installs on mounting bracket 5, center pin 2 is located the horizontal direction, install elasticity indicating device 6 in the junction of end cover 4 and center pin 2, be provided with the second elastic component in the elasticity indicating device 6, can keep elasticity indicating device 6 to be in the state that restriction center pin 2 is connected with mounting bracket 5 under second elastic component elasticity, elasticity indicating device 6 is used for allowing center pin 2 to be connected with mounting bracket 5 after the effect with end cover 4. Because the rolling bearing 3 is sleeved outside the central cylinder 24 in an interference fit manner, if the end cover 4 is not provided, the rolling bearing 3 moves in a direction parallel to the central shaft 2, so that a part of the wheel body 1 is not supported, the wheel body 1 is easy to deform and damage, in order to avoid forgetting to mount the end cap 4, the elastic indicating means 6 are designed, which makes it possible to mount the central shaft 2 on the mounting frame 5 if and only if the end cap 4 is mounted, since the entire guide device, with the central shaft 2 mounted on the mounting 5, can only fulfil its basic function, it must not be forgotten to mount the central shaft 2 on the mounting 5, thereby can effectively avoid forgetting the phenomenon of equipment end cover 4 to avoided because of end cover 4 not, antifriction bearing 3 to remove and lead to the phenomenon of wheel body 1 damage to take place in the 2 directions of center pin, guaranteed the life of wheel body 1.

In order to design simple structure's center pin 2, for end cover 4 provides the installation basis, provide the basis simultaneously for follow-up cooperation installation with mounting bracket 5, center pin 2 includes: two first cylinders 21, two second cylinders 22, two third cylinders 23 and central cylinder 24, central cylinder 24 outer winding has antifriction bearing 3, central cylinder 24 both ends are fixed respectively to two third cylinders 23, the tip that each third cylinder 23 deviates from central cylinder 24 all is fixed to second cylinder 22, the tip that each second cylinder 22 deviates from central cylinder 24 all is fixed to first cylinder 21, form first step in the junction of central cylinder 24 and third cylinder 23, first step is used for hugging closely with end cover 4, first cylinder 21 diameter is less than second cylinder 22 diameter, second cylinder 22 diameter is less than third cylinder 23 diameter, third cylinder 23 diameter is less than central cylinder 24 diameter.

In order to design the elastic indicating means 6 with a simple structure, the elastic indicating means 6 comprises: second spring 61, slider 62, extrusion piece 63 and instruction pole 64, the sunken spout that forms of first step, install slider 62 in the spout, slider 62 can be relative central cylinder 24 and radially move at central cylinder 24, slider 62 is fixed to first second spring 61 one end, first second spring 61 other end is fixed to the spout inner wall, slider 62 is fixed with extrusion piece 63, extrusion piece 63 is used for acting on with end cover 4, extrusion piece 63 is fixed with instruction pole 64, offer the pole hole that supplies instruction pole 64 male in the mounting bracket 5 bottom, if and only after end cover 4 installs on first step instruction pole 64 can insert to the pole downthehole.

In order to realize the installation of center pin 2 and mounting bracket 5, mounting bracket 5 includes: top frame 51 and suspension frame 52, top frame 51 below is connected with two mutual spaced suspension frame 52 through first screw detachably, two suspension frame between 52 installation wheel body 1, it all is provided with first mounting panel and second mounting panel to suspend in midair 52 both sides at each, first cylinder 21 forms the second step with second cylinder 22 junction, second cylinder 22 forms the third step with third cylinder 23 junction, the third step compresses tightly and suspends 52 inboardly, first mounting panel compresses tightly and suspends 52 outsides and second step in midair, first mounting panel, suspension frame 52 and second mounting panel pass through second screwed connection.

The design idea of this embodiment is as follows: firstly, common accessories are produced and assembled on site, so that the transportation speed is improved, the transportation is convenient, the end cover 4 and the first step are generally connected through a third screw, the end cover 4 is often forgotten to be installed, and in order to avoid the installation of the end cover 4 on site, the elastic indicating device 6 is designed, and the elastic indicating device 6 is installed on the first step before leaving a factory; then, the elastic indicating device 6 can only move in the radial direction of the central cylinder 24, when the suspension frame 52, the first mounting plate and the second mounting plate press the indicating rod 64 in the direction parallel to the central shaft 2, the indicating rod 64 cannot move, a through hole is formed in the center of the end cover 4, the first cylinder 21, the second cylinder 22 and the third cylinder 23 can pass through the through hole, the through hole is of a truncated cone structure, the large end of the through hole is located at the small end of the through hole close to one end of the central cylinder 24, the inner wall of the through hole is used for pressing the pressing block 63, when the end cover 4 covers the first step, the inner wall of the through hole slowly presses the pressing block 63, the pressing block 63 moves towards the central line of the central cylinder 24, the indicating rod 64 can be aligned with the rod hole formed in the suspension frame 52, and can also be aligned with the through hole formed in the second mounting plate, and accordingly, the.

Example 3:

this example differs from example 1 in that: in this embodiment, on the basis of embodiment 1, only the installation manner of the elastic indicating device 6 is modified, which facilitates the installation of the elastic indicating device 6.

As shown in fig. 5, the second spring 61 includes: the first mounting ring 611, the second mounting ring 612 and the telescopic body 613 are respectively connected to two ends of the telescopic body 613, and the first mounting ring 611, the second mounting ring 612 and the telescopic body 613 are integrally formed during manufacturing.

The first step surface forms a first insertion rod 71, one end of the sliding block 62 close to the pressing block 63 forms a second insertion rod 72, the first insertion rod 71 is used for being inserted into the first mounting ring 611, and the second insertion rod 72 is used for being inserted into the second mounting ring 612, so that the second spring 61 is hooked between the first insertion rod 71 and the second insertion rod 72.

A guide limiting device 73 is inserted on the central cylinder 24, and the guide limiting device 73 is used for limiting the first mounting ring 611 to be separated from the first inserted bar 71 by penetrating the first inserted bar 71, limiting the second mounting ring 612 to be separated from the second inserted bar 72 by penetrating the second inserted bar 72, and limiting the sliding block 62 to be separated from the sliding groove by penetrating the sliding block 62.

The guide stopper 73 includes: a guide rod 731 and a screw 732, the screw 732 is inserted from the side wall of the central cylinder 24, the screw 732 is in threaded connection with the central cylinder 24, the guide rod 731 passes through the tip of the first insertion rod 71, the tip of the second insertion rod 72 and the slide block 62, the slide block 62 extends from one end of the slide slot to the other end of the slide slot, and the slide block 62 can slide relative to the guide rod 731.

The design idea of this embodiment is as follows: firstly, a sliding groove is designed for accommodating the sliding block 62; then, in order to realize the installation of the second spring 61 in the chute, a first inserted link 71 and a second inserted link 72 are designed, and the first inserted link 71 and the second inserted link 72 hook both ends of the second spring 61; then, since both ends of the second spring 61 are easily separated from the first insertion rod 71 and the second insertion rod 72, a position-limiting member is required, and in order to make it difficult for both ends of the second spring 61 to be easily hooked on the first insertion rod 71 and the second insertion rod 72, the tips of the first insertion rod 71 and the second insertion rod 72 are designed to face the outside of the chute; then, in order to avoid the sliding of the sliding block 62 from the sliding groove, the sliding block 62 also needs to be limited, but the sliding of the sliding block 62 in the sliding groove cannot be influenced; finally, in order to simultaneously limit the position of the second spring 61 and the slider 62, the guide bar 731 is provided, and the screw 732 is provided to position the guide bar 731 to maintain the limited position of the guide bar 731.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A large-tonnage goods lift is characterized by comprising: the car, the sedan-chair door, install mounting box and operating panel, install the sedan-chair door that is used for the switching car on the car, it has the mounting box to articulate on the sedan-chair wall, the mounting box is located sedan-chair door inboard, install operating panel in the mounting box, button spills from the mounting box surface on the operating panel, the mounting hole has been seted up on the mounting box surface, the mounting hole is by the orifice plate switching, the orifice plate can be dismantled with the installation tank wall through locking device and be connected, elasticity limit equipment is installed at the articulated department of mounting box and sedan-chair wall, be provided with first elastic component in the elasticity limit equipment, can keep elasticity limit equipment under the first elastic component elasticity to rotate the relative car rotation of mounting box, install spacing equipment on the orifice plate, spacing equipment is used for making elasticity limit equipment to rotate relative car of mounting box when the orifice plate closes.

2. The large-tonnage freight lift of claim 1, wherein the elastic rotation-limiting device comprises: the elevator car limiting device comprises a limiting rod, an extrusion head and a first spring, wherein a fixed shaft is fixed relative to a car, a rotating ring is fixed relative to an installation box, the rotating ring is sleeved outside the fixed shaft and can rotate relative to the fixed shaft, the extrusion head is located in an installation hole, the extrusion head is connected to one end of the first spring, the first spring is a first elastic piece, the other end of the first spring is fixed to the inner wall of the installation hole, one end of the limiting rod is fixed with the extrusion head, and the other end of the limiting rod is used for being inserted into the fixed shaft.

3. The large-tonnage freight elevator as set forth in claim 2, wherein the limiting device comprises: the inserted bar, the inserted bar is fixed with the orifice plate inside wall, and the extrusion head is seted up and is supplied inserted bar male jack, the first compressive plane of jack one side inner wall, is formed with the second compressive plane on the inserted bar, and the second compressive plane is used for hugging closely with first compressive plane, and the inserted bar is used for making the rotation limiting rod insert in the fixed axle through the first compressive plane of second compressive plane extrusion.

4. A large tonnage freight lift as defined in any one of claims 1 to 3, wherein the locking device comprises: the rotary disk, the apparatus further comprises a rotating shaft, the gyro wheel, the locking lever, wind spring and third spring, the rotary disk is oval structure, be fixed with the pivot that emerges the orifice plate outside on the rotary disk, offer the lockhole that is used for inserting the key in the pivot, the rotary disk is fixed to the wind spring outer end, wind spring inner is fixed to the connecting axle, the connecting axle is fixed with the orifice plate, the rotary disk is tangent with the gyro wheel, the gyro wheel can the pivoted install in locking lever one end, the locking lever other end is used for inserting to the spacing downthehole that the mounting hole inner wall was seted up, the locking lever is fixed to third.

5. The large-tonnage freight elevator as set forth in claim 4, further comprising: the elevator comprises a traction rope and elevator guiding equipment, wherein the traction rope is used for lifting the car, and the elevator guiding equipment is used for guiding the traction rope.

6. The large tonnage freight elevator as set forth in claim 5, wherein the elevator guide apparatus comprises: wheel body, the center pin, antifriction bearing, the end cover, mounting bracket and elasticity indicating device, the wheel body center is passed by antifriction bearing, antifriction bearing installs outside the center pin, be connected with the both ends cover respectively at antifriction bearing both ends, each end cover is all passed by the center pin, the center pin is installed on the mounting bracket, the center pin is located the horizontal direction, install elasticity indicating device in the junction of end cover and center pin, be provided with the second elastic component in the elasticity indicating device, can keep elasticity indicating device to be in the state that restriction center pin and mounting bracket are connected under second elastic component elasticity, elasticity indicating device is used for allowing the center pin to be connected with the mounting bracket after the end cover effect.