CN217889719U - Main shaft of cold sawing machine - Google Patents

Abstract

The utility model provides a cold sawing machine main shaft, main shaft shell and the inside fit installation that can pivoted main shaft pole including fixed setting, the front end that main shaft shell was worn out to the main shaft pole is fixed and is set up integrated into one piece's saw bit mount pad, can install the used saw bit location of cutting on the saw bit mount pad through the saw bit gland, let the main shaft intensity behind the installation saw bit bigger, can overcome bigger inclined to one side torsion, and the cooperation is installed the front end bearing between main shaft shell and main shaft pole, because the integrated into one piece of saw bit mount pad sets up, the installation of front end bearing needs to pass through vertical double-layered shell shaft coupling, first spacing groove, first bearing lid and bearing gland nut carry out effective spacing, can effectively reduce the torsion between saw bit and the main shaft pole in cutting process, furthest reduces the inclined to one side torsion of main shaft in the rotation process, when guaranteeing normal cutting operation, the life of cold sawing machine main shaft has still been promoted by a wide margin.

Description

Main shaft of cold sawing machine

Technical Field

The utility model belongs to the technical field of the cutting equipment technique and specifically relates to a cold saw main shaft.

Background

The cold sawing machine is a cutting equipment widely used in the rolling production line of the section steel of the metallurgical plant, especially the section steel with special section, and is generally installed on the finishing line of the section steel workshop behind the rolling mill. The installation of saw bit on current cold sawing machine is usually through two dismantled and assembled clamping rings, presss from both sides the saw bit dress, realizes the fixed connection between saw bit and the main shaft, but this kind of connection mounting means is when cutting the operation, and the torsion between saw bit and the main shaft is very big, and the main shaft can take place to turn round partially at the rotation in-process, causes the damage of main shaft very easily, not only influences the normal clear of cutting the operation, has still reduced the life of main shaft by a wide margin.

Disclosure of Invention

An object of the utility model is to provide a cold saw main shaft, the fixed saw bit mount pad that sets up integrated into one piece of front end of main shaft pole, the front end bearing is installed to the position fit between main shaft pole and main shaft housing simultaneously, reduces the torsion between saw bit and the main shaft pole, and furthest reduces the main shaft and has turned round partially at the rotation in-process, has solved the problem among the prior art.

The utility model provides a technical scheme that its technical problem adopted is: a cold sawing machine main shaft, including the fixed main shaft shell that sets up, can pivoted main shaft rod is installed to the main shaft shell fit-in, the first bearing cap is installed in the front end cooperation of main shaft shell, the second bearing cap is installed to the rear end cooperation of main shaft shell, one that the main shaft rod worn out first bearing cap is served and is equipped with first screw thread, cooperation installation gland nut on the first screw thread, the fixed saw bit mount pad that sets up on the main shaft rod between first screw thread and the first bearing cap, saw bit mount pad and main shaft rod integrated into one piece, the cover is equipped with the saw bit gland on the main shaft rod between saw bit mount pad and the gland nut, rotation gland nut can promote the saw bit gland to move near to the saw bit mount pad, first spacing groove has been seted up to the front end of main shaft shell, the front end bearing is installed to first spacing inslot cooperation, set up spacing draw-in on the main shaft rod in the main shaft shell, cooperation installation vertical double-layered shell shaft coupling is installed on the spacing draw-in groove, the inner circle of vertical double-layered shell coupling contacts with the inner circle of front end bearing, the bearing cap contacts with the bearing outer lane, bearing nut and bearing inner circle contact with the bearing nut, the bearing outer lane is installed to the bearing in the bearing of bearing and the keyway of the rear end of bearing, the bearing nut, the bearing can compress tightly the bearing outer lane, the bearing shell, the bearing outer lane is close to the bearing outer lane on the bearing of bearing. The front end bearing is two symmetrically-arranged angular contact ball bearings which are installed in a first limiting groove in a matched mode, the two angular contact ball bearings are installed back to back, the wide faces of the outer rings of the angular contact ball bearings are opposite, the narrow faces of the inner rings are opposite, the vertical type clamping shell coupling is in contact with the inner rings of the inner side angular contact ball bearings, the first bearing cover is in contact with the outer rings of the outer side angular contact ball bearings, the bearing compression nuts can rotate to be in contact with the inner rings of the outer side angular contact ball bearings, and the first limiting groove, the vertical type clamping shell coupling, the first bearing cover and the bearing compression nuts limit the two angular contact ball bearings. The front end bearing is a cylindrical cross roller bearing. The saw blade mounting seat is provided with threaded counter bores which are circumferentially arranged, the saw blade gland is provided with a counter bore which corresponds to the threaded counter bores, and the threaded counter bores and the counter bore are internally provided with connecting bolts in a matched mode. Two groups of fastening bolts which are rotationally symmetrical are arranged between the two semi-annular sleeves of the vertical type clamping shell coupling. The end face of one side, close to the saw blade mounting seat, of the bearing compression nut is provided with a rotary clamping groove which is circumferentially arranged, the periphery of the bearing compression nut is provided with a screw hole matched with the set screw, and the screw hole is located on the outer side of the first bearing cover. The rear end of the main shaft shell is provided with a second limiting groove matched with the rear end bearing, and the second bearing cover and the second limiting groove limit the rear end bearing.

The utility model has the advantages of: a cold saw main shaft, main shaft shell and the inside fit installation that sets up including fixed can the pivoted main shaft pole, the front end that main shaft shell was worn out to the main shaft pole is fixed to be set up integrated into one piece's saw bit mount pad, can install the used saw bit location of cutting on the saw bit mount pad through the saw bit gland, let the main shaft intensity behind the installation saw bit bigger, can overcome bigger inclined to one side torsion, and the cooperation installs the front end bearing between main shaft shell and main shaft pole, because the integrated into one piece setting of saw bit mount pad, the installation of front end bearing need be through vertical double-layered shell shaft coupling, first spacing groove, first bearing lid and bearing gland nut carry out effectively spacingly, can effectively reduce the torsion between saw bit and the main shaft pole in cutting process, furthest reduces the inclined to one side torsion of main shaft in the rotation assurance, when guaranteeing normal cutting operation, the life of cold saw main shaft has still been promoted by a wide margin.

Drawings

Fig. 1 is a schematic three-dimensional structure of the present invention;

fig. 2 is a front view of the present invention;

FIG. 3 is an enlarged view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of the cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is an enlarged view of the cross-sectional view taken along line C-C of FIG. 2;

FIG. 6 is an enlarged view taken along line D-D of FIG. 2;

FIG. 7 is a schematic structural view of a vertical split-shell coupling;

fig. 8 is a schematic view of a bearing compression nut.

Detailed Description

A cold saw main shaft, as shown in fig. 1 and fig. 2, including the fixed main shaft shell 1 that sets up, main shaft shell 1 fit-in installs can pivoted main shaft pole 2, first bearing lid 3 is installed in the front end cooperation of main shaft shell 1, second bearing lid 4 is installed in the rear end cooperation of main shaft shell 1, above-mentioned first bearing lid 3 and second bearing lid 4 can carry on spacingly to the bearing between main shaft shell 1 and the main shaft pole 2, first bearing lid 3 and second bearing lid 4 can be worn out respectively at the both ends of main shaft pole 2 simultaneously.

As shown in fig. 3, a first thread 5 is provided on one end of the spindle rod 2 penetrating through the first bearing cover 3, a gland nut 6 is fittingly installed on the first thread 5, and the gland nut 6 can rotate on the spindle rod 2 along the first thread 5. Fixed saw bit mount pad 7 that sets up on the main shaft pole 2 between first screw thread 5 and the first bearing cap 3, saw bit mount pad 7 and main shaft pole 2 integrated into one piece, the cover is equipped with saw bit gland 8 on the main shaft pole 2 between saw bit mount pad 7 and the gland nut 6, rotates gland nut 6 and can promote saw bit gland 8 and move near to saw bit mount pad 7 to it is fixed to realize the installation of saw bit between saw bit mount pad 7 and saw bit gland 8.

In order to avoid the eccentric torsion of the main shaft rod 2 in the rotation process, a first limiting groove 9 is formed in the front end of the main shaft shell 1, and a front end bearing is installed in the first limiting groove 9 in a matched mode.

In order to realize the accurate spacing of the axial position of the front end bearing in the main shaft shell 1 and enable the front end bearing to penetrate into the main shaft shell from the rear end of the main shaft rod 2, a spacing clamping groove 11 is formed in the main shaft rod 2 in the main shaft shell 1, a vertical type clamping shell coupling 12 is installed on the spacing clamping groove 11 in a matched mode, the vertical type clamping shell coupling 12 is in contact with the inner ring of the front end bearing, and a first spacing groove 9 is in contact with the outer ring of the front end bearing.

The first bearing cover 3 is in contact with the outer ring of the front end bearing, a second thread 13 is arranged on the spindle rod 2 between the front end bearing and the saw blade mounting seat 7, a bearing compression nut 14 is installed on the second thread 13 in a matched mode, and the bearing compression nut 14 can rotate to be in contact with the inner ring of the front end bearing. The first limiting groove 9, the vertical type clamping shell coupling 12, the first bearing cover 3 and the bearing compression nut 14 form axial and radial limiting on the front end bearing, and can reduce the eccentric torque generated when the main shaft rod 2 rotates to the maximum extent.

In order to realize the power input of the main shaft 2, as shown in fig. 4, a key slot 15 is formed on one end of the main shaft 2, which penetrates through the second bearing cover 4, and can be connected with a power input shaft with a connecting key to provide power for the rotation of the main shaft 2. To ensure the rotation of the rear end of the spindle shaft 2 within the spindle housing 1, a rear end bearing 16 is fitted between the spindle housing 1 and the spindle shaft 2 at a position close to the second bearing cover 4.

Further, the front end bearing is two symmetrically arranged angular contact ball bearings 10 which are installed in a first limiting groove 9 in a matched mode, the two angular contact ball bearings 10 are installed back to back, the wide faces of the outer rings of the angular contact ball bearings 10 are opposite, the narrow faces of the inner rings are opposite, the vertical type clamping shell coupling 12 is in contact with the inner rings of the inner side angular contact ball bearings 10, the first bearing cover 3 is in contact with the outer rings of the outer side angular contact ball bearings 10, the bearing compression nuts 14 can rotate to be in contact with the inner rings of the outer side angular contact ball bearings 10, and the first limiting groove 9, the vertical type clamping shell coupling 12, the first bearing cover 3 and the bearing compression nuts 14 limit the two angular contact ball bearings 10. The angular contact ball bearing 10 with the structure can simultaneously bear radial load and axial load between the main shaft rod 2 and the main shaft rod, and the larger the contact angle is, the higher the axial bearing capacity is, and the angular contact ball bearing can work at a higher rotating speed.

Further, the front end bearing is a cylindrical crossed roller bearing, and the cylindrical crossed roller bearing can be independently installed and can also be installed in a matching mode for bearing larger load.

Further, in order to realize the fixed mounting of the arc piece between the saw blade mounting seat 7 and the saw blade gland 8, as shown in fig. 5, the saw blade mounting seat 7 is provided with a thread counter bore 17 arranged circumferentially, the saw blade gland 8 is provided with a counter bore 23 matched with the thread counter bore 17, the thread counter bore 17 and the counter bore 23 are internally provided with a connecting bolt 18 in a matching manner, the connection between the saw blade mounting seat 7 and the saw blade gland 8 is fixed through the connecting bolt 18, the connecting bolt 18 can be installed in a limited manner, the installation of the saw blade on the spindle rod 2 is more stable, and the saw blade can be conveniently replaced by disassembling and assembling.

Further, in order to ensure the rotational stability of the main shaft 2 during rotation and reduce the possibility of the occurrence of twisting, as shown in fig. 6 and 7, two sets of fastening bolts 19 are installed between the two semi-annular sleeves of the vertical type shell coupling 12, and the structure of the vertical type shell coupling 12 disposed on the limiting clamping groove 11 does not bring the twisting influence on the rotation of the main shaft 2.

Further, in order to facilitate the spindle to be mounted, the rotating bearing compression nut 14 compresses and positions the inner ring of the angular contact ball bearing 10, as shown in fig. 8, a rotating clamping groove 20 is circumferentially arranged on an end surface of the bearing compression nut 14 close to one side of the saw blade mounting seat 7, and due to the fact that the distance between the saw blade mounting seat 7 and the first bearing cover 3 is too short, the rotating clamping groove 20 is arranged to enable a worker to screw the bearing compression nut 14 with the help of a more convenient dismounting tool.

In order to prevent the bearing compression nut 14 from losing the compression limit of the diagonal contact ball bearing 10 under the action of centrifugal force when the main shaft rod 2 rotates after the angular contact ball bearing 10 is compressed and positioned, the periphery of the bearing compression nut 14 is provided with a screw hole 21 matched with a set screw, the screw hole 21 is positioned on the outer side of the first bearing cover 3, the set screw is arranged in the screw hole 21 to realize the limit of the bearing compression nut 14 on the second thread 13, namely after the compression and positioning of the diagonal contact ball bearing 10 are completed, the bearing compression nut 14 cannot rotate under the action of external force, and the compression state of the diagonal contact ball bearing 10 can be always maintained.

Further, in order to realize the installation and the limitation of the rear end bearing 16 on the rear end of the main shaft rod 2, the rear end of the main shaft housing 1 is provided with a second limiting groove 22 matched with the rear end bearing 16, and the second bearing cover 4 and the second limiting groove 22 form axial limitation on the rear end bearing 16 so as to facilitate the positioning, the dismounting and the mounting.

Technical scheme of the utility model not be restricted to the utility model the within range of embodiment. The technical contents not described in detail in the present application are all known technologies.

Claims (7)

1. A main shaft of a cold sawing machine is characterized in that: the spindle comprises a spindle shell (1) which is fixedly arranged, a main shaft rod (2) which can rotate is installed in the spindle shell (1) in a matching mode, a first bearing cover (3) is installed at the front end of the spindle shell (1) in a matching mode, a second bearing cover (4) is installed at the rear end of the spindle shell (1) in a matching mode, one end, penetrating out of the first bearing cover (3), of the main shaft rod (2) is provided with a first thread (5), a gland nut (6) is installed on the first thread (5) in a matching mode, a saw blade mounting seat (7) is fixedly arranged on the main shaft rod (2) between the first thread (5) and the first bearing cover (3), the saw blade mounting seat (7) and the main shaft rod (2) are integrally formed, a saw blade gland (8) is sleeved on the main shaft rod (2) between the saw blade mounting seat (7) and the gland nut (6), the gland nut (6) can push the saw blade gland (8) to move towards the saw blade mounting seat (7) to be close to the main shaft housing, a first limiting groove (9) is formed in the front end of the spindle shell (1), a front end of the spindle shell (9) is installed with a front end coupling groove (11), a vertical clamping groove (12) is installed on the bearing shell, and an inner ring of the bearing coupling clamp groove (11) which is installed on the bearing shell (1), first bearing cover (3) contact with the outer lane of front end bearing, be equipped with second screw thread (13) on main shaft pole (2) between front end bearing and saw bit mount pad (7), bearing gland nut (14) are installed in the cooperation on second screw thread (13), bearing gland nut (14) can rotate to contact with the inner circle of front end bearing, above-mentioned first spacing groove (9), vertical double-layered shell shaft coupling (12), first bearing cover (3) and bearing gland nut (14) form spacingly to front end bearing, main shaft pole (2) are worn out one of second bearing cover (4) and are served and seted up keyway (15), cooperation is installed rear end bearing (16) between main shaft shell (1) and main shaft pole (2) near second bearing cover (4) position department.

2. A cold saw machine spindle according to claim 1, wherein: the front end bearing is two symmetrically-arranged angular contact ball bearings (10) which are installed in a first limiting groove (9) in a matched mode, the two angular contact ball bearings (10) are installed back to back, the wide faces of the outer rings of the angular contact ball bearings (10) are opposite, the narrow faces of the inner rings are opposite, the vertical type clamping shell coupling (12) is in contact with the inner rings of the inner side angular contact ball bearings (10), the first bearing cover (3) is in contact with the outer rings of the outer side angular contact ball bearings (10), the bearing compression nut (14) can rotate to be in contact with the inner rings of the outer side angular contact ball bearings (10), and the first limiting groove (9), the vertical type clamping shell coupling (12), the first bearing cover (3) and the bearing compression nut (14) limit the two angular contact ball bearings (10).

3. A cold saw spindle according to claim 1, wherein: the front end bearing is a cylindrical cross roller bearing.

4. A cold saw spindle according to claim 1, wherein: the saw blade mounting seat (7) is provided with a thread counter bore (17) which is circumferentially arranged, the saw blade gland (8) is provided with a sink groove (23) corresponding to the thread counter bore (17), and the thread counter bore (17) and the sink groove (23) are internally provided with connecting bolts (18) in a matched manner.

5. A cold saw spindle according to claim 1, wherein: two groups of fastening bolts (19) which are rotationally symmetrical are arranged between the two semi-annular sleeves of the vertical type clamping shell coupling (12).

6. A cold saw spindle according to claim 1, wherein: the end face, close to one side of the saw blade mounting seat (7), of the bearing compression nut (14) is provided with a rotating clamping groove (20) which is circumferentially arranged, the periphery of the bearing compression nut (14) is provided with a screw hole (21) matched with a set screw, and the screw hole (21) is located on the outer side of the first bearing cover (3).

7. A cold saw machine spindle according to claim 1, wherein: the rear end of the main shaft shell (1) is provided with a second limiting groove (22) matched with the rear end bearing (16), and the second bearing cover (4) and the second limiting groove (22) limit the rear end bearing (16).

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