CN219773921U - Rotating shaft device for heavy protective door and heavy protective door - Google Patents
Rotating shaft device for heavy protective door and heavy protective door Download PDFInfo
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- CN219773921U CN219773921U CN202320898471.3U CN202320898471U CN219773921U CN 219773921 U CN219773921 U CN 219773921U CN 202320898471 U CN202320898471 U CN 202320898471U CN 219773921 U CN219773921 U CN 219773921U
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- 230000001681 protective effect Effects 0.000 title claims abstract description 44
- 239000000428 dust Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 230000020347 spindle assembly Effects 0.000 claims 3
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 12
- 230000007246 mechanism Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a rotating shaft device for a heavy protective door and the heavy protective door, which comprise a rotating shaft, a ground shaft end unit and a ceiling shaft end unit; the upper shaft end unit and the lower shaft end unit are respectively positioned at the upper end part and the lower end part of the rotating shaft. The rotating shaft device can be used for heavy protective doors, and can be smoothly opened and closed under the conditions of long-term use and large impact force of oversized and overweight protective doors. The rotating shaft device can meet the use requirements of protective doors with different weights.
Description
Technical Field
The utility model relates to a rotating shaft device for a heavy-duty protective door and the heavy-duty protective door.
Background
Currently, protective doors are of a wide variety and there are many types of door leaves that are oversized, overweight and ultra-tall. The traditional door shaft is difficult to bear the weight of an overweight door leaf for a long time, the door opening and closing process is laborious, and particularly after the door is impacted, the rotating shaft of the protective door is easy to deform, so that the door cannot be opened and closed smoothly.
CN217080077U discloses a door-shaft mechanism and a heavy-duty rotary protective door, the door-shaft mechanism comprises a base, a first supporting plate and a second supporting plate connected with the base, a connecting shaft fixed on the first supporting plate and the second supporting plate, a shaft sleeve sleeved on the connecting shaft and a connecting arm connected with the shaft sleeve. The provision of the connecting arm in this patent document makes the stability and durability of the door spindle mechanism somewhat poor.
CN204984030U discloses a rotary door shaft mechanism, including the observation window, go up door frame, lower door frame and connect the concentric shaft of going up door frame and lower door frame, go up the round pin axle hole that the round pin axle upper end was inserted through first round pin axle and rotate to be connected, the lower extreme of concentric shaft is equipped with the second round pin axle, the round pin axle hole that the round pin axle was inserted down is connected with lower door frame, first round pin axle and concentric shaft eccentric settings, install respectively on round pin axle hole and the round pin axle hole of lower door frame of concentric shaft upper end with first round pin axle and second round pin axle complex copper sheathing. The rotary door spindle mechanism of this patent document is not suitable for a heavy duty protective door.
CN107780799a discloses a shielding and protecting vertical hinged door, which comprises a supporting device, a door leaf and a door leaf driving device, wherein the door leaf comprises an upper door leaf and a lower door leaf which are detachably and alternately connected; the supporting device comprises two supporting mechanisms with the same structure, each supporting mechanism comprises a shaft hub, a bearing shaft, a bearing and a bearing seat, one end of each bearing shaft is connected with the corresponding shaft hub in a matched mode, the other end of each bearing shaft is connected with the corresponding bearing, the two shaft hubs are respectively arranged on the side faces of the upper door leaf and the lower door leaf, and the two bearing seats are respectively arranged on the wall body and the ground.
Disclosure of Invention
In view of this, it is an object of the present utility model to provide a spindle device for a heavy duty protective door, which can be used for heavy duty protective doors, for example, with door leaves weighing tens of tons. The ultra-large and overweight protective door can still be opened and closed smoothly under the conditions of long-term use and large impact force. Furthermore, the rotating shaft device can meet the use requirements of protective doors with different weights, and meets the reliability and convenience of long-term use of the large protective door. Another object of the present utility model is to provide a heavy duty guard door.
The utility model adopts the following technical scheme to realize the aim.
In one aspect, the present utility model provides a spindle device for a heavy duty guard door, comprising a rotation shaft, a ground spindle end unit, and a ceiling spindle end unit;
the upper shaft end unit and the lower shaft end unit are respectively positioned at the upper end part and the lower end part of the rotating shaft;
the upper shaft end unit comprises a top nut, a first radial bearing, a first bearing mounting seat, a bearing plate and a fastening bolt; the first radial bearing is sleeved at the upper end part of the rotating shaft in an interference fit mode or an excessive fit mode, and the first bearing mounting seat is matched with the first radial bearing; the top nut is sleeved on the rotating shaft and is positioned above the first radial bearing; the bearing plate is sleeved on the rotating shaft and is positioned below the first bearing mounting seat; the fastening bolts are vertically arranged on the first bearing mounting seat and the bearing plate;
the ground shaft end unit comprises a second radial bearing, a jacking nut, a second bearing mounting seat and a centering adjusting piece; the second radial bearing is sleeved at the lower end part of the rotating shaft in an interference fit manner; the jacking nut is sleeved on the rotating shaft and is positioned below the second radial bearing; the second bearing mounting seat is provided with a groove, and the second radial bearing and the jacking nut are both positioned in the groove; the centering adjustment is configured to be at least two, and a part of the at least two centering adjustment members are disposed in the second bearing mounting seat.
Therefore, the use requirements of the protective door with different weights can be realized by adjusting the matching mode of the first radial bearing and the second radial bearing with other parts.
In some embodiments, the first radial bearing is in an excessive fit with the rotating shaft and the first bearing mount, and the second radial bearing is in an interference fit with the rotating shaft, such a configuration may allow the ground shaft end unit to carry the vertical and radial forces of the door leaf and the upper shaft end unit to carry the radial forces of the door leaf. Such a structure is suitable for use in relatively large guard gates.
In other embodiments, the first radial bearing is in interference fit with the rotating shaft and the first bearing mount, and the second radial bearing is in interference fit with the rotating shaft, such a structure may enable the ground shaft end unit to carry the vertical force and the radial force of the door leaf and the upper shaft end unit to carry the vertical force and the radial force of the door leaf. Such a structure is suitable for a large-sized protective door with a single door leaf weighing tens of tons.
In still other embodiments, the vertical thrust ball bearing of the ground shaft end unit is eliminated, the first radial bearing adopts interference fit with the rotating shaft and the first bearing mounting seat, and the second radial bearing adopts interference fit with the rotating shaft, so that the ground shaft end unit can bear the radial force of the door leaf, and the upper shaft end unit can bear the vertical force and the radial force of the door leaf. Such a structure is suitable for a common heavy duty guard gate.
In the utility model, the jacking nut jacks the inner ring of the second radial bearing with the rotating shaft, and simultaneously provides vertical support for the vertical thrust ball bearing.
In the present utility model, the second radial bearing may be a double row tapered roller bearing. Thus, the use requirements of the oversized and overweight protective door are favorably met, and the service life of the rotary door shaft is further prolonged.
The rotating shaft device is characterized in that:
the top nut comprises an upper nut and a lower nut which are connected, and the outer diameter of the upper nut is larger than that of the lower nut;
the upper shaft end unit further comprises a pressing plate; the compaction plate is tightly attached to the outer wall of the lower nut and is located above the first bearing mounting seat. Like this, the inner circle of first journal bearing is through the boss screw thread cooperation of screwing top nut with the rotation axis, and the outer lane of first journal bearing passes through the hold-down plate and cooperates with first bearing mount pad, reaches the bearing atress requirement.
In the utility model, the rotating shaft, the first bearing mounting seat, the pressing plate, the first radial bearing and the bearing plate can be connected into a whole through the fastening bolts and then mounted on the upper shaft mounting plate.
According to the rotating shaft device, preferably, the upper shaft end unit further comprises a reinforcing rib plate;
the reinforcing rib plates are symmetrically arranged on the bearing plate and are respectively positioned on two sides of the top nut. Therefore, the bearing plate and the reinforcing rib plate can be welded into a whole to jointly form the bearing seat, and the vertical force and the radial force of the bearing door leaf transmitted to the rotating shaft can be borne.
In the utility model, the upper and lower adjustment of the door shaft can be realized by increasing and decreasing the adjusting base plate at the lower part of the bearing plate and tightening the top nut. The door spindle refers to the part of the rotation axis located in the door leaf.
According to the rotating shaft device of the present utility model, preferably, the upper shaft end unit further includes an upper shaft mounting plate; the two crown block mounting plates are symmetrically arranged below the bearing plate; the length of the upper shaft mounting plate is greater than that of the bearing plate, and one end of the upper shaft mounting plate is flush with one end of the bearing plate. In the utility model, the installation plate of the upper shaft is pre-embedded in the door frame concrete.
According to the rotating shaft device of the present utility model, preferably, the centering adjustment member includes a centering nut and a centering bolt, at least two centering bolts are horizontally and symmetrically disposed in the second bearing mounting seat, and the centering nut is sleeved on the centering bolt and is far from the groove. In the utility model, the ground shaft end unit can bear the vertical force transmitted by the door leaf to the rotating shaft and the radial force transmitted by the door leaf to the rotating shaft, and simultaneously, the radial centering adjustment of the rotating shaft can be carried out by adjusting a plurality of centering nuts and a plurality of bolts, for example, four groups during installation.
According to the rotating shaft device of the present utility model, preferably, the ground shaft end unit further includes a vertical thrust ball bearing, which is sleeved at the lower end of the rotating shaft, is located below the tightening nut, and is located in the groove. This can be used for heavy duty guard doors of different weights.
According to the rotating shaft device of the present utility model, preferably, the ground shaft end unit further includes an adjustment pad and a ground shaft mounting frame;
the adjusting pad is arranged below the second bearing mounting seat;
the adjusting pad, the second bearing mounting seat and the centering bolt are all arranged in the ground shaft mounting frame. Thus, the vertical height adjustment is facilitated through the adjusting pad at the lower part of the second bearing mounting seat, and the high-precision mounting of the heavy door is satisfied. The arrangement of the ground shaft mounting frame is beneficial to protecting the second radial bearing and the like.
According to the rotating shaft device of the present utility model, preferably, the ground shaft end unit further includes a dust-proof seal ring; the dustproof sealing ring is sleeved at the lower end part of the rotating shaft and is positioned above the second radial bearing. Thus, the second radial bearing is protected, the service life of the rotating shaft device is prolonged, and the service life of the heavy protective door is prolonged.
According to the rotating shaft device of the present utility model, preferably, the earth-boring unit further includes a dust-proof cover plate and a plurality of dust-proof fastening bolts; the dustproof cover plate covers the ground shaft mounting frame; the dustproof fastening bolt is vertically arranged on the dustproof cover plate and the second bearing mounting seat 。 This is advantageous for protecting the second radial bearing.
On the other hand, the utility model also provides a heavy protective door, preferably comprising a door leaf, a door frame and the rotating shaft device for the heavy protective door, wherein the rotating shaft of the rotating shaft device vertically penetrates through one side of the door leaf, the upper shaft end unit is fixed in the door frame, and the ground shaft end unit is fixed in the ground pre-buried concrete.
The rotating shaft device can realize the use requirements of the protective doors with different weights by adjusting the matching modes of the radial bearings in the upper shaft end unit and the lower shaft end unit and other parts, and meets the reliability and convenience of long-term application of the large protective door. The door leaf with the weight of tens of tons can still ensure the normal opening and closing of the protective door after bearing larger impact force. The heavy protective door is flexible to open and free of clamping stagnation.
Drawings
Fig. 1 is a schematic perspective view of a pivot device for a heavy duty door according to the present utility model.
Fig. 2 is a schematic side view of fig. 1.
Fig. 3 is a schematic view of the A-A cross section of fig. 2.
The reference numerals are explained as follows:
1-a rotation shaft;
the device comprises a 2-jackshaft end unit, a 21-top nut, a 22-first radial bearing, a 23-first bearing mounting seat, a 24-bearing plate, a 25-fastening bolt, a 26-pressing plate, a 27-reinforcing rib plate and a 28-jackshaft mounting plate;
the device comprises a 3-ground shaft end unit, a 31-second radial bearing, a 32-tightening nut, a 33-second bearing mounting seat, a 34-centering nut, a 35-centering bolt, a 36-vertical thrust ball bearing, a 37-ground shaft mounting frame, a 38-dustproof cover plate and a 39-dustproof fastening bolt.
Detailed Description
The present utility model will be further described with reference to specific examples, but the scope of the present utility model is not limited thereto.
Example 1
Fig. 1 is a schematic perspective view of a pivot device for a heavy duty door according to the present utility model. Fig. 2 is a schematic side view of fig. 1. Fig. 3 is a schematic view of the A-A cross section of fig. 2.
As shown in fig. 1 to 3, the rotating shaft device for a heavy duty protective door of the present utility model includes a rotating shaft 1, a head end unit 2, and a ground end unit 3.
The stub shaft unit 2 is located at the upper end of the rotary shaft 1. The upper shaft end unit 2 comprises a top nut 21, a first radial bearing 22, a first bearing mounting seat 23, a bearing plate 24, a fastening bolt 25, a pressing plate 26, a reinforcing rib plate 27 and an upper shaft mounting plate 28.
The first radial bearing 22 is fitted over the upper end portion of the rotary shaft 1 in an excessive fit manner. The first bearing mount 23 is matched with the first radial bearing 22 and is disposed around the outer periphery of the first radial bearing 22. Meanwhile, the first radial bearing 22 is excessively fitted with the rotary shaft 1 and the first bearing mount 23. I.e. the first radial bearing 22 is mounted to the rotating shaft 1 and in the first bearing mount 23 in an over-fit manner.
The top nut 21 is sleeved on the rotating shaft 1 and is located above the first radial bearing 22. The top nut 21 includes an upper nut and a lower nut connected, the outer diameter of the upper nut being larger than the outer diameter of the lower nut. The pressing plate 26 is closely attached to the outer wall of the lower nut and is located above the first bearing mount 23.
The bearing plate 24 is sleeved on the rotating shaft 1 and is positioned below the first bearing mounting seat 23. The outer contour of the carrier plate 24 may be square or rectangular, for example square. The fastening bolts 25 vertically pass through the pressing plate 26, the first bearing mount 23 and the carrier plate 24 in order. The fastening bolts 25 are plural, and the plural fastening bolts 25 are uniformly distributed.
The reinforcing rib plates 27 are symmetrically arranged on the bearing plate 24 and are respectively positioned at two sides of the top nut 21. The reinforcing rib 27 may be welded to the carrier plate 24.
The two crown block mounting plates 28 are symmetrically arranged below the carrier plate 24. The length of the crown plate 28 is greater than the length of the carrier plate 24, and one end of the crown plate 28 is flush with one end of the carrier plate 24. This facilitates the fixing of the head end unit 2 in the frame concrete.
The stub shaft unit 3 is located at the lower end of the rotary shaft 1. The earth shaft end unit 3 includes a second radial bearing 31, a knock nut 32, a second bearing mount 33, a centering adjustment (including a centering nut 34, a centering bolt 35), a vertical thrust ball bearing 36, an earth shaft mounting frame 37, an adjustment pad (not shown), a dust seal ring (not shown), a dust cover plate 38, and a dust fastening bolt 39.
The second radial bearing 31 is sleeved on the lower end part of the rotating shaft 1 in an interference fit manner. The jacking nut 32 is sleeved on the rotating shaft 1 and is positioned below the second radial bearing 31. The jacking nut 32 is matched with the rotating shaft 1. The second bearing mount 33 has a groove. The second radial bearing 31 and the jam nut 32 are both located in a recess in the second bearing mount 33. The centering bolts 35 are at least two, for example four. Four centering bolts 35 are horizontally and symmetrically disposed within the second bearing mount 33. The centering nut 34 is sleeved on the centering bolt 35 and is far away from the groove of the second bearing mounting seat 33.
The vertical thrust ball bearing 36 is sleeved on the lower end of the rotating shaft 1, is positioned below the jacking nut 32, and is positioned in the groove of the second bearing mounting seat 33. The vertical thrust ball bearing 36 is matched with the rotary shaft 1.
The second bearing mount 33 and the centering bolt 35 are both provided in the ground shaft mount frame 37. Thus, the shaft device can be more stable by embedding the shaft mounting frame 37 in the concrete on the ground.
The adjusting pad is disposed below the second bearing mount 33 and in the ground shaft mount frame 36, so as to adjust the rotation shaft 1 in the vertical direction.
The dust seal ring is sleeved on the lower end part of the rotating shaft 1 and is positioned above the second radial bearing 31. The dust cover plate 38 covers the ground shaft mounting frame 37.
The dust-proof fastening bolts 39 are vertically provided on the dust-proof cover plate 38 and the second bearing mount 33.
When the rotating shaft device with the structure is used for a heavy protective door, the ground shaft end unit 3 can be used for bearing the vertical force and the radial force of a door leaf, and the upper shaft end unit 2 can be used for bearing the radial force of the door leaf.
Example 2
The present embodiment differs from embodiment 1 only in that the first radial bearing 22 is fitted over the upper end portion of the rotary shaft 1 in an interference fit manner. At the same time, the first radial bearing 22 is interference fitted with the rotary shaft 1 and the first bearing mount 23. I.e. the first radial bearing 22 is mounted to the rotating shaft 1 and in the first bearing mount 23 with an interference fit.
When the rotating shaft device with the structure is used for a heavy protective door, the ground shaft end unit 3 can be used for bearing the vertical force and the radial force of the door leaf, and the upper shaft end unit 2 can be used for bearing the vertical force and the radial force of the door leaf.
Example 3
The present embodiment differs from embodiment 2 only in that the ground shaft end unit 3 of the present embodiment eliminates the vertical thrust ball bearing 36.
When the rotating shaft device with the structure is used for a heavy protective door, the ground shaft end unit 3 can be used for bearing the radial force of the door leaf, and the upper shaft end unit 2 can be used for bearing the vertical force and the radial force of the door leaf.
Example 4
The embodiment provides a heavy protective door, which comprises a door leaf, a door frame and a rotating shaft device for the heavy protective door, wherein the rotating shaft device is provided with a rotating shaft 1 vertically penetrating through one side of the door leaf, a top shaft end unit 2 is fixed in the door frame, and a ground shaft end unit 3 is fixed in ground pre-buried concrete.
The following describes the installation and use method of the spindle device for a heavy duty protective door in this embodiment:
in the installation, the ground shaft installation frame 37 of the ground shaft end unit 3 is pre-buried in the door frame concrete. The second radial bearing 31 of the ground shaft end unit 3 is in interference fit with the rotating shaft 1, after the inner ring of the second radial bearing 31 is tightly propped against the rotating shaft 1 by the propping nut 32, the second radial bearing 31, the propping nut 32 and the vertical thrust ball bearing 36 are assembled with the rotating shaft 1 and then are installed in the second bearing installation seat 33, and meanwhile, enough lubricating grease is filled in the second bearing installation seat 33, so that the daily lubricating requirement of the thrust ball bearing 36 is met. The centering nut 34 and the centering bolt 35 are adjusted to center the radial horizontal plane of the rotary shaft 1, and the adjusting pad at the lower part of the second bearing mount 33 is adjusted to adjust the vertical direction of the rotary shaft 1. After the internal installation of the ground shaft end unit 3 is completed, the dustproof sealing ring, the dustproof cover plate 38, the dustproof fastening bolt 39 and the second bearing mounting seat 33 are assembled last, so that daily dust and the like are prevented from entering.
The first radial bearing 22 of the upper shaft end unit 2 is mounted on the rotating shaft 1 and in the first bearing mounting seat 23 in an excessive fit mode, the inner ring of the first radial bearing 22 is screwed and matched with the rotating shaft 1 through screwing the top nut 21 and boss threads, the outer ring of the first radial bearing 22 is matched with the first bearing mounting seat 23 through the pressing plate 26, the rotating shaft 1, the first bearing mounting seat 23, the pressing plate 26 and the first radial bearing 22 are connected with the bearing plate 24 into a whole through the fastening bolts 25 and then mounted on the upper shaft mounting plate 28, and enough lubricating grease is filled in the first bearing mounting seat 23 before screwing the top nut 21, so that the use of the first radial bearing 22 is met.
Example 5
The embodiment provides a heavy protective door, which comprises a door leaf, a door frame and a rotating shaft device for the heavy protective door, wherein the rotating shaft 1 of the rotating shaft device vertically penetrates through one side of the door leaf, a crown block 2 is fixed in the door frame, and a ground block 3 is fixed in ground pre-buried concrete.
The installation and use method of the spindle device for a heavy duty guard door in this embodiment is different from embodiment 4 only in that the first radial bearing 22 of the upper spindle end unit 2 is installed to the rotation shaft 1 and in the first bearing installation seat 23 in an interference fit manner.
Example 6
The embodiment provides a heavy protective door, it includes door leaf, door frame and is used for heavy protective door's pivot device according to embodiment 3, pivot device's rotation axis 1 vertically passes one side of door leaf, the upper shaft end unit 2 is fixed in the door frame, the earth shaft end unit 3 is fixed in the pre-buried concrete on the ground.
The installation and use method of the spindle device for a heavy duty guard door in this embodiment is different from embodiment 4 only in that the first radial bearing 22 of the upper spindle end unit 2 is installed to the rotation shaft 1 and in the first bearing installation seat 23 in an interference fit manner.
The present utility model is not limited to the above-described embodiments, and any modifications, improvements, substitutions, and the like, which may occur to those skilled in the art, fall within the scope of the present utility model without departing from the spirit of the utility model.
Claims (10)
1. The rotating shaft device for the heavy protective door is characterized by comprising a rotating shaft, a ground shaft end unit and a ceiling shaft end unit;
the upper shaft end unit and the lower shaft end unit are respectively positioned at the upper end part and the lower end part of the rotating shaft;
the upper shaft end unit comprises a top nut, a first radial bearing, a first bearing mounting seat, a bearing plate and a fastening bolt; the first radial bearing is sleeved at the upper end part of the rotating shaft in an interference fit mode or an excessive fit mode, and the first bearing mounting seat is matched with the first radial bearing; the top nut is sleeved on the rotating shaft and is positioned above the first radial bearing; the bearing plate is sleeved on the rotating shaft and is positioned below the first bearing mounting seat; the fastening bolts are vertically arranged on the first bearing mounting seat and the bearing plate;
the ground shaft end unit comprises a second radial bearing, a jacking nut, a second bearing mounting seat and a centering adjusting piece; the second radial bearing is sleeved at the lower end part of the rotating shaft in an interference fit manner; the jacking nut is sleeved on the rotating shaft and is positioned below the second radial bearing; the second bearing mounting seat is provided with a groove, and the second radial bearing and the jacking nut are both positioned in the groove; the centering adjusting parts are arranged in at least two, and part of the at least two centering adjusting parts are symmetrically arranged in the second bearing mounting seat.
2. The spindle assembly of claim 1 wherein:
the top nut comprises an upper nut and a lower nut which are connected, and the outer diameter of the upper nut is larger than that of the lower nut;
the upper shaft end unit further comprises a pressing plate; the compaction plate is tightly attached to the outer wall of the lower nut and is located above the first bearing mounting seat.
3. The rotary shaft device according to claim 1, wherein the crown block further comprises reinforcing ribs;
the reinforcing rib plates are symmetrically arranged on the bearing plate and are respectively positioned on two sides of the top nut.
4. The spindle assembly of claim 1 wherein said zenith end unit further comprises a zenith mounting plate; the two crown block mounting plates are symmetrically arranged below the bearing plate; the length of the upper shaft mounting plate is greater than that of the bearing plate, and one end of the upper shaft mounting plate is flush with one end of the bearing plate.
5. The spindle assembly of claim 1 wherein said centering adjustment includes a centering nut and a centering bolt, at least two centering bolts being disposed horizontally and symmetrically within said second bearing mount, said centering nut being disposed over said centering bolt and being spaced from said recess.
6. The rotary shaft device according to claim 1, wherein the ground shaft end unit further comprises a vertical thrust ball bearing which is sleeved at the lower end of the rotary shaft, is positioned below the tightening nut, and is positioned in the groove.
7. The rotary shaft device according to claim 5, wherein the ground shaft end unit further comprises an adjustment pad and a ground shaft mounting frame;
the adjusting pad is arranged below the second bearing mounting seat;
the adjusting pad, the second bearing mounting seat and the centering bolt are all arranged in the ground shaft mounting frame.
8. The rotary shaft device according to claim 7, wherein the earth-boring end unit further comprises a dust seal ring; the dustproof sealing ring is sleeved at the lower end part of the rotating shaft and is positioned above the second radial bearing.
9. The rotary shaft device according to claim 8, wherein the earth-boring end unit further comprises a dust cover plate and a plurality of dust fastening bolts; the dustproof cover plate covers the ground shaft mounting frame; the dustproof fastening bolts are vertically arranged on the dustproof cover plate and the second bearing mounting seat.
10. A heavy protective door, characterized by comprising a door leaf, a door frame and a rotating shaft device for the heavy protective door according to any one of claims 1-9, wherein the rotating shaft of the rotating shaft device vertically penetrates through one side of the door leaf, the upper shaft end unit is fixed in the door frame, and the ground shaft end unit is fixed in the ground pre-buried concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320898471.3U CN219773921U (en) | 2023-04-20 | 2023-04-20 | Rotating shaft device for heavy protective door and heavy protective door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320898471.3U CN219773921U (en) | 2023-04-20 | 2023-04-20 | Rotating shaft device for heavy protective door and heavy protective door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219773921U true CN219773921U (en) | 2023-09-29 |
Family
ID=88137423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320898471.3U Active CN219773921U (en) | 2023-04-20 | 2023-04-20 | Rotating shaft device for heavy protective door and heavy protective door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219773921U (en) |
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2023
- 2023-04-20 CN CN202320898471.3U patent/CN219773921U/en active Active
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