CN115582185A

CN115582185A - Sliding bearing for large crusher

Info

Publication number: CN115582185A
Application number: CN202211374704.6A
Authority: CN
Inventors: 于璐
Original assignee: Yantai Chenyulu Design Decoration Co ltd
Current assignee: Shandong Fuma Bearing Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-01-10
Anticipated expiration: 2042-11-04
Also published as: CN116809184A; CN115582185B

Abstract

The invention discloses a sliding bearing for a large crusher, and relates to the technical field of bearings. This a slide bearing for large-scale breaker, the on-line screen storage device comprises a base, the side surface fixedly connected with motor support of base, motor support's upper end fixedly connected with rotates the motor, the last fixed surface of base is connected with broken case shell, circular hole has been seted up to one side surface that broken case shell is close to the rotation motor, circular hole department cover that broken case shell surface was seted up is equipped with the rotation post, the rotation post runs through the inner chamber of broken case shell and extends to the surface of broken case shell, the rotation post is connected with the output that rotates the motor, the surface cover that the rotation post extends to broken case shell surface is equipped with bearing device, has reached fine reduction and has rotated frictional force and thermal effect that the in-process produced.

Description

Sliding bearing for large crusher

Technical Field

The invention relates to the technical field of bearings, in particular to a sliding bearing for a large-sized crusher.

Background

Plain bearings, bearings that operate under sliding friction. The sliding bearing works stably and reliably without noise. Under the condition of liquid lubrication, the sliding surface is separated by lubricating oil without direct contact, the friction loss and the surface abrasion can be greatly reduced, and the oil film also has certain vibration absorption capacity. But the starting frictional resistance is large. The portion of the shaft supported by the bearing is called the journal, and the part that mates with the journal is called the bearing shell. The layer of antifriction material cast on the inner surface of the bearing shell in order to improve its frictional properties is referred to as the bearing lining. The materials of the bearing shell and the bearing liner are collectively referred to as sliding bearing materials. The sliding bearing is generally applied to the operating part which is difficult to maintain and fill lubricating oil under the condition of low-speed and heavy-load working conditions, and sliding friction occurs when the sliding bearing works; the magnitude of the sliding friction force depends mainly on the manufacturing accuracy; the friction force of the sliding bearing mainly depends on the material of the sliding surface of the bearing, and the common working surface of the sliding bearing has the self-lubricating function; the sliding bearing is divided into a non-metallic sliding bearing and a metallic sliding bearing according to the material; the sliding bearing can generate a large amount of heat due to the action of friction force in the sliding process; the sliding bearings on the market often cannot well reduce the friction and heat generated in the rotating process.

Disclosure of Invention

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a slide bearing for large-scale breaker, includes the base, the side surface fixedly connected with motor support of base, motor support's upper end fixedly connected with rotates the motor, the last fixed surface of base is connected with broken case shell, circular hole has been seted up near one side surface that rotates the motor to broken case shell, circular hole department cover that broken case shell surface was seted up is equipped with the rotation post, the rotation post runs through the inner chamber of broken case shell and extends to the surface of broken case shell, the rotation post is connected with the output that rotates the motor, the surface cover that the rotation post extends to broken case shell surface is equipped with bearing device.

Preferably, the broken blade of fixedly connected with between the opposite face of broken case shell inner chamber, the board is dialled to the external fixed connection that the rotation post is located broken case shell inner chamber, square hole has been seted up to the surface of broken case shell, the square hole department cover that broken case shell surface was seted up is equipped with out the workbin, dial the board through setting up broken blade and setting up at the surface that rotates the post, can reach the crushing effect to the material, in operation, the staff opens the rotation motor, it can produce the rotation to rotate the motor, thereby it produces the rotation to drive the rotation post, put into broken case shell to needs broken article among, under the rotation that rotates the post, it can make object and broken blade produce the contact to dial the board, under high-speed rotation, the object is cut into the fritter device by broken blade, the play workbin that rethread broken case surface set up takes out the object after the breakage.

Preferably, bearing device includes bearing buffer, bearing buffer fixed connection is at the upper surface of base, bearing buffer's upper surface is provided with cooling device, be provided with the bearing between cooling device and bearing buffer's the opposite face, the bearing housing is established at the surface that rotates the post, bearing buffer includes the bearing buffer shell, the inner wall fixedly connected with fixed block of department of bearing buffer shell, the outside fixedly connected with adaptation post of fixed block, the surface cover of adaptation post is equipped with the elastic plate, the last fixed surface of elastic plate and fixed block is connected with the connecting rod, the elastic plate is provided with the air cushion with the lower surface of fixed block, the one end that the adaptation post was kept away from to the elastic plate is provided with the extrusion strip, extrusion strip and elastic plate extrusion adaptation mutually, the extrusion strip runs through the bearing buffer shell and extends to the surface of bearing buffer shell, be provided with the buffering package between the opposite face of bearing buffer shell bottom surface and extrusion strip, through setting up bearing buffer, can reduce the vibration that the rotation motor drove the rotation in-process of rotation post and produce, if not reduce to the vibration that the rotation post produced, the bearing housing is damaged, adaptation post fixed connection post inner wall fixedly connected at the bearing buffer shell, the outer wall department of bearing buffer can alleviate the extrusion strip again, thereby the rotation post can not produce the vibration extrusion strip and can be in addition with the rotation of rotation post again with the vibration extrusion strip, thereby the rotation post, the extrusion strip, the rotation post again can be guaranteed the rotation post again the vibration extrusion strip, the rotation post, thereby the rotation post.

Preferably, the buffering package is including buffering package shell, the inner chamber bottom surface fixedly connected with elasticity strip of buffering package shell, the last fixed surface of elasticity strip is connected with buffering package support column, the upper end fixed connection of buffering package support column is at the inner chamber top surface of buffering package shell, fixedly connected with buffering package backup pad between the opposite face of buffering package support column, fixedly connected with buffering package elasticity post between the opposite face of buffering package shell inner chamber, through setting up buffering package, can further alleviate the vibration that the rotation post brought for the extrusion strip, buffering package sets up in the below of extrusion strip, not only can play the effect of alleviating the vibration, can reach the spacing effect to the extrusion strip simultaneously, can not make the extrusion strip produce the skew under the effect of vibration.

Preferably, cooling device includes the water tank, square hole has been seted up to the upper surface of water tank, the square hole department cover that the water tank upper surface was seted up is equipped with the inlet tube, fixedly connected with cooling tube between the opposite face of water tank, the hole has been seted up to the junction of water tank and cooling tube, the bottom surface fixedly connected with soft board in cooling tube inner chamber, the upper end fixedly connected with water conservancy diversion piece of soft board through setting up cooling device, can reach the cooling effect to bearing device, during operation, the rotation motor can drive the rotation post and produce the rotation, under high-speed rotation, the rotation post can rub with bearing device, thereby produce a large amount of heat, at this moment pour into rivers among the inlet tube, among the cooling tube can be poured into from the water tank to the rivers, the setting of soft board and water conservancy diversion piece in the cooling tube can reach the effect of stirring up to rivers, rivers can stir the water conservancy diversion piece in the cooling tube, owing to set up the soft board, the water conservancy diversion piece can produce and rock to reach violently and stir the effect of stirring up, thereby make the temperature of rivers more balanced.

Preferably, the bearing includes the port bearing, the quantity of port bearing is two, and two the port bearing all overlap and establish between cooling device and bearing buffer's opposite face, be provided with intermediate shaft between the opposite face of port bearing, the port bearing includes the port bearing pipe, the rotation is connected with the bearing dwang between the relative of the inner chamber of port bearing pipe, the surface cover of bearing dwang is equipped with the wheel that rolls, intermediate shaft includes the intermediate shaft pipe, the track is seted up to the inner chamber port of intermediate shaft pipe, the track department cover of intermediate shaft pipe is equipped with the limiting plate, the fixed surface of limiting plate is connected with spacing post, the other end fixedly connected with antiskid ribbed tile of spacing post. The antiskid ribbed tile rotates the friction adaptation of post looks through setting up the bearing, can reduce and rotate the friction that the post produced at the rotation in-process, and the bearing includes two port bearings and intermediate bearing, through such setting mode of port bearing, intermediate bearing, port bearing, the reduction frictional force that can be more obvious, when rotating the post and rotating, rotates the post and can be in the same place with the contact that the antiskid ribbed tile is tight, under the effect of the gyro wheel in two port bearings, can make more that frictional force reduces.

The invention provides a sliding bearing for a large crusher. The method has the following beneficial effects:

1. this a slide bearing for large-scale breaker, set up through setting up broken blade and at the surface of rotation post and dial the board, can reach the crushing effect to the material, in operation, the staff opens and rotates the motor, it can produce the rotation to rotate the motor, thereby it produces the rotation to drive the rotation post, put into broken case shell to needs broken article, under the rotation of rotation post, it can make object and broken blade produce the contact to dial the board, under high-speed rotation, the object is cut into the fritter device by broken blade, the ejection of compact case that rethread broken case surface set up takes out the object after the breakage.

2. This a slide bearing for large-scale breaker, through setting up bearing buffer, can reduce the rotation in-process vibration that produces rotating the post in the rotation motor drives, if not reduce the vibration that rotates the post production, can make the bearing impaired, adaptation post fixed connection is in bearing buffer shell inner wall department, the surface cover is equipped with the elastic plate, the elastic plate again with extrusion strip looks extrusion adaptation, when rotating the post and producing the vibration to bearing device, the extrusion strip can extrude the elastic plate, thereby alleviate the vibration that rotates the post production, the elastic plate can not drop with the adaptation post has been guaranteed again in the setting of connecting rod and air cushion.

3. This a slide bearing for large-scale breaker through setting up the buffering package, can be further alleviate the vibration that the rotating column brought for the extrusion strip, the buffering package sets up in the below of extrusion strip, not only can play the effect of alleviating the vibration, can reach the spacing effect to the extrusion strip simultaneously, can not make the extrusion strip produce the skew under the effect of vibration.

4. This a slide bearing for large-scale breaker, through setting up cooling device, can reach the cooling effect to bearing device, in operation, the rotation motor can drive and rotate the post and produce the rotation, under high-speed rotation, it can rub with bearing device to rotate the post, thereby produce a large amount of heat, at this moment, pour into rivers among the inlet tube, rivers can be followed among the cooling tube in the water tank, the soft board in the cooling tube and the setting of water conservancy diversion piece, can reach the effect of stirring up to rivers, rivers can stir the water conservancy diversion piece in the cooling tube, owing to set up the soft board, the water conservancy diversion piece can produce acutely and rock, thereby reach and stir up the effect of scattering to rivers, thereby make the temperature of rivers more balanced.

5. This a slide bearing for large-scale breaker through setting up the bearing, can reduce the friction that the rotation post produced at the rotation in-process, and the bearing includes two port bearings and intermediate bearing, through the port bearing, intermediate bearing, such mode of setting up of port bearing, the reduction frictional force that can be more obvious, when rotating the post and rotating, it can be in the same place with the contact that the antiskid ribbed tile is tight to rotate the post, under the effect of the gyro wheel in two port bearings, can make more that frictional force reduces.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic sectional view of the outer shell structure of the crushing box of the present invention;

FIG. 3 is a schematic view of a bearing assembly according to the present invention;

FIG. 4 is a disassembled view of the bearing device structure of the present invention;

FIG. 5 is a schematic view of a bearing cushioning device according to the present invention;

FIG. 6 is a diagram illustrating a structure of a buffer packet according to the present invention;

FIG. 7 is a schematic view of the cooling apparatus of the present invention;

FIG. 8 is a schematic view of a bearing structure according to the present invention;

FIG. 9 is a schematic view of the present port bearing invention;

FIG. 10 is a schematic view of an intermediate bearing according to the present invention.

In the figure: 1. a base; 2. a motor bracket; 3. rotating the motor; 4. rotating the column; 5. a bearing device; 6. a crushing box housing; 7. crushing the blade; 8. pulling a plate; 9. a discharging box; 51. a bearing buffer device; 52. a cooling device; 53. a bearing; 511. a bearing cushioning device housing; 512. a fixed block; 513. an adaptation column; 514. an elastic plate; 515. a connecting rod; 516. an air cushion; 517. extruding the strip; 518. buffering the packet; 5181. a buffer packet housing; 5182. an elastic strip; 5183. a buffer bag supporting column; 5184. a cushion pack support plate; 5185. the buffer bag is provided with an elastic column; 521. a water tank; 522. a water inlet pipe; 523. a cooling tube; 524. a soft board; 525. a flow guide block; 531. a port bearing; 532. a middle bearing; 5311. a port bearing tube; 5312. a bearing rotating rod; 5313. a rolling wheel; 5321. a middle bearing tube; 5322. a track; 5323. a limiting plate; 5324. a limiting post; 5325. an antiskid plate.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Example 1

As shown in fig. 1-2, the present invention provides a technical solution: the utility model provides a slide bearing for large-scale breaker, includes base 1, the side surface fixedly connected with motor support 2 of base 1, the upper end fixedly connected with of motor support 2 rotates motor 3, the last fixed surface of base 1 is connected with broken case shell 6, broken case shell 6 has offered circular hole near the one side surface that rotates motor 3, the circular hole department cover that broken case shell 6 surface was seted up is equipped with rotates post 4, it runs through the inner chamber of broken case shell 6 and extends to the surface of broken case shell 6 to rotate post 4, it is connected with the output that rotates motor 3 to rotate post 4, the surface cover that rotates post 4 and extends to broken case shell 6 surface is equipped with bearing device 5, fixedly connected with crushing blade 7 between the opposite face of broken case shell 6 inner chamber, it dials board 8 to rotate the outer fixedly connected with that post 4 is located broken case shell 6 inner chamber, square hole has been seted up to the surface of broken case shell 6, the square hole department cover that broken case shell 6 surface was seted up is equipped with out workbin 9.

During the use, dial board 8 through setting up crushing blade 7 and setting up at the surface of rotation post 4, can reach the crushing effect to the material, in operation, the staff opens and rotates motor 3, it can produce the rotation to rotate motor 3, thereby it produces the rotation to drive rotation post 4, put into crushing case shell 6 to needs broken article, under 4 rotations of rotation post, it can make object and crushing blade 7 produce the contact to dial board 8, under high-speed rotation, the object is cut into the fritter device by crushing blade 7, the object after the breakage is taken out to ejection of compact case 9 that rethread crushing case shell 6 surface set up.

Example 2

As shown in fig. 3-6, the bearing device 5 includes a bearing buffering device 51, the bearing buffering device 51 is fixedly connected to the upper surface of the base 1, a cooling device 52 is disposed on the upper surface of the bearing buffering device 51, a bearing 53 is disposed between the opposite surfaces of the cooling device 52 and the bearing buffering device 51, the bearing 53 is sleeved on the outer surface of the rotating column 4, the bearing buffering device 51 includes a bearing buffering device housing 511, a fixed block 512 is fixedly connected to the inner wall of the bearing buffering device housing 511, an adaptation column 513 is fixedly connected to the outer side of the fixed block 512, an elastic plate 514 is sleeved on the outer surface of the adaptation column 513, a connecting rod 515 is fixedly connected to the upper surfaces of the elastic plate 514 and the fixed block 512, a pressing strip 517 is disposed on the lower surface of the elastic plate 514 and the fixed block 512, a pressing strip 517 is disposed on one end of the elastic plate 514 far away from the adaptation column, the pressing strip 517 is in pressing fit with the elastic plate 514, the pressing strip 517 runs through the bearing buffering device housing 511 and extends to the outer surface of the bearing buffering device housing 511, a buffering strip 5182 is disposed on the inner cavity of the opposite surface of the supporting plate 51518, and a supporting plate 5182 is connected between the fixed block 5182, and a supporting plate 5182 is connected to the upper surface of the buffering device housing 51518, and a supporting plate 5182 is connected to the buffering device housing 5182.

During the use, through setting up bearing buffer 51, can reduce the vibration that produces at the rotation in-process that rotates motor 3 drive rotation post 4, if not reduce the vibration that rotates post 4 and produce, can make bearing 53 impaired, adaptation post 513 fixed connection is in bearing buffer shell 511 inner wall department, the surface cover is equipped with elastic plate 514, elastic plate 514 again with extrusion strip 517 looks extrusion adaptation, when rotating post 4 to bearing device 5 and producing the vibration, extrusion strip 517 can extrude elastic plate 514, thereby alleviate the vibration that rotates post 4 and produce, connecting rod 515 and air cushion 516's setting has guaranteed again that elastic plate 514 and adaptation post 513 can not drop, through setting up buffering package 518, can further alleviate the vibration that rotates post 4 and bring for extrusion strip 517, buffering package 518 sets up the below at extrusion strip 517, not only can play the effect of alleviating the vibration, can reach the spacing effect to extrusion strip 517 simultaneously, can not make extrusion strip 517 produce the skew under the effect of vibration.

Example 3

As shown in fig. 7-10, the cooling device 52 includes a water tank 521, a square hole is formed in the upper surface of the water tank 521, a water inlet pipe 522 is sleeved at the square hole formed in the upper surface of the water tank 521, a cooling pipe 523 is fixedly connected between opposite surfaces of the water tank 521, a hole is formed in the joint of the water tank 521 and the cooling pipe 523, a soft plate 524 is fixedly connected to the bottom surface of the inner cavity of the cooling pipe 523, a flow guide block 525 is fixedly connected to the upper end of the soft plate 524, the bearing 53 includes two port bearings 531, the number of the port bearings 531 is two, the two port bearings 531 are all sleeved between the opposite surfaces of the cooling device 52 and the bearing buffer device 51, an intermediate bearing 532 is disposed between the opposite surfaces of the port bearings 531, the port bearing 531 includes a port bearing pipe 5311, a bearing 5312 is rotatably connected between the opposite surfaces of the inner cavity of the port bearing pipe 5311, an intermediate bearing 5313 is sleeved on the outer surface of the bearing rotating rod 5312, the intermediate bearing 532 includes an intermediate bearing pipe 5321, a limiting plate 5323 is sleeved on the end of the intermediate bearing pipe 5321, and a limiting plate 5324 is fixedly connected to a limiting plate 5324. The antiskid plate 5325 is in friction fit with the rotating column 4.

When the cooling device 52 is arranged, the cooling effect on the bearing device 5 can be achieved, when the cooling device works, the rotating motor 3 can drive the rotating column 4 to rotate, under high-speed rotation, the rotating column 4 can rub against the bearing device 5, a large amount of heat is generated, at this time, water flow is filled into the water inlet pipe 522, the water flow can be filled into the cooling pipe 523 from the water tank 521, the soft plate 524 and the flow guide block 525 in the cooling pipe 523 can achieve the effect of stirring and dispersing the water flow, the flow guide block 525 can be stirred in the cooling pipe 523 by the water flow, due to the arrangement of the soft plate 524, the flow guide block 525 can shake violently, so that the effect of stirring and dispersing the water flow is achieved, the temperature of the water flow is more balanced, the friction generated in the rotating process of the rotating column 4 can be reduced by arranging the bearing 53, the bearing 53 comprises two port bearings 534 and a middle bearing 532, the arrangement mode of the port bearing 531, the middle bearing 532 and the port bearing 531 can reduce the friction force more, when the rotating column 4 rotates, the rotating column 4 and the anti-skid plate 5325 can be in contact with the rolling wheel under the effect of the two ports 5313.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in this and related arts based on the embodiments of the present invention without creative efforts, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. A sliding bearing for a large crusher, comprising a base (1), characterized in that: the utility model discloses a motor support, including base (1), motor support, crushing case shell (6), circular hole, rotation post (4) and bearing device (5), the surface cover that side surface fixedly connected with motor support (2) of base (1), the upper end fixedly connected with of motor support (2) rotates motor (3), the last fixed surface of base (1) is connected with crushing case shell (6), circular hole department cover that crushing case shell (6) surface was seted up is close to one side surface of rotating motor (3) and is equipped with rotation post (4), rotate the surface that inner chamber that post (4) run through crushing case shell (6) and extend to crushing case shell (6), rotation post (4) are connected with the output that rotates motor (3), the surface cover that rotates post (4) and extend to crushing case shell (6) surface is equipped with bearing device (5).

2. A sliding bearing for a large crusher according to claim 1, characterized in that: fixedly connected with crushing blade (7) between the opposite face of broken case shell (6) inner chamber, it dials board (8) to rotate the outer fixed surface that post (4) are located broken case shell (6) inner chamber to be connected with, square hole has been seted up to the surface of broken case shell (6), square hole department cover that broken case shell (6) surface was seted up is equipped with out workbin (9).

3. A sliding bearing for a large crusher according to claim 1, characterized in that: bearing device (5) are including bearing buffer (51), bearing buffer (51) fixed connection is at the upper surface of base (1), the upper surface of bearing buffer (51) is provided with cooling device (52), be provided with bearing (53) between the opposite face of cooling device (52) and bearing buffer (51), the surface of rotating post (4) is established in bearing (53) cover.

4. A sliding bearing for a large crusher according to claim 3, characterized in that: bearing buffer (51) are including bearing buffer shell (511), the inner wall department fixedly connected with fixed block (512) of bearing buffer shell (511), outside fixedly connected with adaptation post (513) of fixed block (512), elastic plate (514) are established to the surface cover of adaptation post (513), the last fixed surface of elastic plate (514) and fixed block (512) is connected with connecting rod (515), the lower surface of elastic plate (514) and fixed block (512) is provided with air cushion (516), the one end that adaptation post (513) were kept away from in elastic plate (514) is provided with extrusion strip (517), extrusion strip (517) and elastic plate (514) extrude the adaptation mutually, extrusion strip (517) run through bearing buffer shell (511) and extend to the surface of bearing buffer shell (511), be provided with buffering package (518) between the opposite face of bearing buffer shell (511) inner chamber bottom surface and extrusion strip (517).

5. A sliding bearing for a large crusher according to claim 4, characterized in that: buffering package (518) are including buffering package shell (5181), the inner chamber bottom surface fixedly connected with elastic strip (5182) of buffering package shell (5181), the last fixed surface of elastic strip (5182) is connected with buffering package support column (5183), the upper end fixed connection of buffering package support column (5183) is at the inner chamber top surface of buffering package shell (5181), fixedly connected with buffering package backup pad (5184) between the opposite face of buffering package support column (5183), fixedly connected with buffering package elastic column (5185) between the opposite face of buffering package shell (5181) inner chamber.

6. A sliding bearing for a large crusher according to claim 3, characterized in that: cooling device (52) include water tank (521), square hole has been seted up to the upper surface of water tank (521), the square hole department cover that the upper surface of water tank (521) was seted up is equipped with inlet tube (522), fixedly connected with cooling tube (523) between the opposite face of water tank (521), the hole has been seted up to the junction of water tank (521) and cooling tube (523), the bottom surface fixedly connected with soft board (524) of cooling tube (523) inner chamber, the upper end fixedly connected with water conservancy diversion piece (525) of soft board (524).

7. A sliding bearing for a large crusher according to claim 3, characterized in that: the bearing (53) comprises two port bearings (531), the number of the port bearings (531) is two, the port bearings (531) are sleeved between opposite surfaces of the cooling device (52) and the bearing buffer device (51), and an intermediate bearing (532) is arranged between the opposite surfaces of the port bearings (531).

8. A sliding bearing for a large crusher according to claim 3, characterized in that: the utility model discloses a bearing structure of bearing, including port bearing (5311), port bearing (531), rotation is connected with bearing dwang (5312) between relative of the inner chamber of port bearing pipe (5311), the surface cover of bearing dwang (5312) is equipped with rolling wheel (5313), intermediate bearing (532) are including intermediate bearing pipe (5321), track (5322) are seted up to the inner chamber port of intermediate bearing pipe (5321), track (5322) department cover of intermediate bearing pipe (5321) is equipped with limiting plate (5323), the fixed surface of limiting plate (5323) is connected with spacing post (5324), the other end fixedly connected with antiskid ribbed tile (5325) of spacing post (5324). The antiskid plate (5325) is in friction fit with the rotating column (4).