CN223519421U - A heavy-duty grinding electric spindle - Google Patents
A heavy-duty grinding electric spindleInfo
- Publication number
- CN223519421U CN223519421U CN202422910220.XU CN202422910220U CN223519421U CN 223519421 U CN223519421 U CN 223519421U CN 202422910220 U CN202422910220 U CN 202422910220U CN 223519421 U CN223519421 U CN 223519421U
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- Prior art keywords
- spindle
- pull rod
- double
- cylindrical roller
- bearing group
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Abstract
本实用新型涉及电主轴技术领域，尤其是一种重载磨削电主轴。其包括壳体，壳体的尾端通过螺栓固定有后轴承座，后轴承座上通过螺栓固定有油缸座，壳体的前端通过螺栓固定有前端盖，在壳体和后轴承座内依次通过双列圆柱滚子轴承组一、双向推力角接触球轴承组以及双列圆柱滚子轴承组二活动安装有芯轴，芯轴内有安装有可前后移动的拉杆，拉杆的前端有用固定磨削刀的拉爪组件，拉杆的尾端伸出芯轴后通过螺栓固定有打刀环，油缸座内活塞的前端在液压的驱动下可与打刀环的尾部接触用于推动拉杆前移。这种轴系配置，主轴刚性高，能够承受非常大的径向和轴向的磨削力，可以实现大进给量的磨削，振动小，精度高。提高磨削零件的表面质量和精度，磨削效率高。
This utility model relates to the field of electric spindle technology, and in particular to a heavy-duty grinding electric spindle. It includes a housing, a rear bearing seat bolted to the rear end of the housing, a cylinder seat bolted to the rear bearing seat, and a front cover bolted to the front end of the housing. A spindle is movably mounted within the housing and rear bearing seat via a first double-row cylindrical roller bearing assembly, a second double-row thrust angular contact ball bearing assembly, and a third double-row cylindrical roller bearing assembly. A movable pull rod is mounted within the spindle. The front end of the pull rod has a claw assembly for fixing the grinding tool. The rear end of the pull rod extends beyond the spindle and is bolted to a tool-removing ring. The front end of a piston within the cylinder seat, driven by hydraulic pressure, contacts the rear end of the tool-removing ring to push the pull rod forward. This shaft configuration provides high spindle rigidity, enabling it to withstand very large radial and axial grinding forces, achieving high feed rates, low vibration, and high precision. It improves the surface quality and precision of ground parts and increases grinding efficiency.
Description
Technical Field
The utility model relates to the technical field of electric spindles, in particular to a heavy-duty grinding electric spindle.
Background
The grinding is a key process in the machining process, the performance of the grinding electric spindle determines the surface quality and the grinding precision of the ground part and also determines the grinding efficiency, and meanwhile, the grinding parameters are very key to the service life and the performance of the grinding electric spindle, so that the grinding electric spindle is required to have larger grinding feed amount and higher rotating speed, and meanwhile, the spindle is required to have higher rigidity under the condition of higher rotating speed operation. The grinding main shaft in the current market is provided with a mechanical grinding main shaft, and the main shaft is driven to run by a motor belt mode, so that the defects of high rotating speed, large vibration, large noise and low grinding efficiency are overcome. Most of grinding electric main shafts adopt precise angular contact ball bearings, so that high-rotation-speed operation can be realized, but the main shafts cannot grind radial force greatly, can bear axial force, and can bear smaller axial grinding force. The spindle adopts the precise angular contact ball bearing, so that the rigidity is low, the grinding quality cannot be guaranteed, the grinding precision is low, the grinding with large cutting quantity cannot be performed, and the grinding efficiency is low.
In view of the above-mentioned drawbacks, the present inventors have actively studied and innovated to create a heavy duty grinding electric spindle, which has a more industrially useful value.
Disclosure of utility model
In order to solve the technical problems, the utility model aims to provide a heavy-duty grinding electric spindle.
The utility model discloses a heavy-duty grinding motorized spindle which comprises a shell, wherein a rear bearing seat is fixed at the tail end of the shell through a bolt, an oil cylinder seat is fixed on the rear bearing seat through a bolt, a front end cover is fixed at the front end of the shell through a bolt, a mandrel is movably arranged in the shell and the rear bearing seat through a double-row cylindrical roller bearing group I, a double-row angular contact ball bearing group II and a double-row cylindrical roller bearing group II in sequence, a pull rod capable of moving forwards and backwards is arranged in the mandrel, a pull claw assembly for fixing a grinding cutter is arranged at the front end of the pull rod, a cutter ring is fixed at the tail end of the pull rod through a bolt after the tail end of the pull rod extends out of the mandrel, the front end of a piston in the oil cylinder seat can be contacted with the tail of the cutter ring under the hydraulic drive to push the pull rod to move forwards, a motor rotor is arranged in the middle of the mandrel through interference fit, and an electronic stator connected with the motor rotor is arranged at the inner side of the shell.
The front end of the mandrel adopts a mode of combining and configuring a double-row cylindrical roller bearing group I and a double-row angular thrust ball bearing, the rear end adopts a double-row cylindrical roller bearing group II, the double-row short cylindrical roller bearing group only can bear radial force due to radial force generated by front end grinding, in the precision bearing, the double-row short cylindrical roller bearing group is a bearing capable of bearing the largest radial force, and the double-row angular thrust bearing can bear axial force larger than the precision ball bearing due to the fact that the contact angle is larger than the precision ball bearing.
Further, the front end of the mandrel is turned outwards, a front spacer ring is attached to the inner side of the mandrel, a first double-row cylindrical roller bearing group is attached to the inner side of the front spacer ring, an inner spacer ring and an outer spacer ring are arranged between the first double-row cylindrical roller bearing group and the two-way thrust angular contact ball bearing group, the inner spacer ring is attached to the mandrel, the outer spacer ring is attached to the inner wall of the shell, and a first locking nut screwed on the mandrel is arranged on the outer side of the two-way thrust angular contact ball bearing group.
The front spacer ring, the inner spacer ring, the outer spacer ring and the outer spacer ring separate the double-row cylindrical roller bearing group I and the bidirectional thrust angular contact ball bearing group, so that the front end of the mandrel runs stably.
Further, a raised step surface structure is arranged on the mandrel, the front end of the rear space ring is in contact with the step surface, a check ring which extends inwards is arranged on the rear bearing seat, the end face of one side of the double-row cylindrical roller bearing group II is in contact with the tail end of the rear space ring and the check ring of the rear bearing seat, a rear bearing cover is fixed on the outer side of the rear bearing seat through bolts, the rear bearing cover is tightly pressed on the outer ring of the double-row cylindrical roller bearing group II, the locking nut II is screwed in the mandrel, and the locking nut II is tightly pressed on the inner ring of the double-row cylindrical roller bearing group II.
Two sides of a double-row cylindrical roller bearing group II arranged at the tail end of the mandrel are respectively assembled through a rear spacer ring, a rear bearing cover and a locking nut II, the double-row cylindrical roller bearing group II is limited, and stable support is provided for the tail end operation of the mandrel.
Further, the pull claw assembly comprises a plurality of clack type claws, two ends of the outer sides of the claws are outwards protruded, the middle straight section of each claw is attached to the protruding structure of the inner side of the mandrel, the front end of the pull rod is provided with a limiting head through threads, the front end of the limiting head is outwards protruded, and a gap for installing a cutter is reserved between the limiting head and the claws.
The clamping jaw on the clamping jaw assembly is matched with the limiting head to fixedly mount the cutter.
Further, a disc spring placing groove is formed between the middle part of the pull rod and the mandrel, the disc spring is sleeved on the pull rod, one end of the disc spring is contacted with the step surface at the inner side of the mandrel, and the other end of the disc spring is contacted with the step surface at the tail end of the pull rod.
A disc spring is arranged between the pull rod and the mandrel, and provides power for the pull rod to the right, so that the stability of the cutter after installation is ensured.
Further, the tail end of the mandrel is provided with a pull rod gland through threads, the tail end of the pull rod penetrates through the pull rod gland, and an opening at the tail end of the mandrel is smaller than a through hole in the pull rod gland.
The positions of the mandrel and the tail end of the pull rod are limited through the pull rod gland, and the maximum moving distance of the pull rod is limited.
By means of the scheme, the heavy-duty grinding motorized spindle has the advantages that the heavy-duty grinding motorized spindle is configured in a mode of combining the first double-row cylindrical roller bearing group and the two-way thrust angular contact ball bearing group, the first double-row cylindrical roller bearing group can bear large radial force, the two-way thrust angular contact ball bearing group bears axial force, and the second double-row cylindrical roller bearing group is adopted at the rear end. The shafting configuration has high rigidity of the main shaft, can bear very large radial and axial grinding force, can realize grinding with large feed quantity, and has small vibration and high precision. The surface quality and the precision of the ground part are improved, and the grinding efficiency is high.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate a certain embodiment of the present utility model and therefore should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a cross-sectional view of FIG. 1 of the present utility model;
FIG. 3 is an enlarged schematic view of the area A of FIG. 2 in accordance with the present utility model;
fig. 4 is an enlarged schematic view of the present utility model at region B of fig. 2.
In the figure, 1, a shell, 2, a rear bearing seat, 3, an oil cylinder seat, 4, a front end cover, 5, a first double-row cylindrical roller bearing group, 6, a bidirectional thrust angular contact ball bearing group, 7, a second double-row cylindrical roller bearing group, 8, a mandrel, 9, a pull rod, 10, a knife ring, 11, a piston, 12, a motor rotor, 13, an electronic stator, 14, a front space ring, 15, an inner space ring, 16, an outer space ring, 17, a first locking nut, 18, a rear space ring, 19, a rear bearing cover, 20, a claw, 21, a limit head, 22, a disc spring, 23, a disc spring, 24, a pull rod gland, 25 and a second locking nut.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
Referring to fig. 1 and 2, the heavy-duty grinding motorized spindle, the shell 1, the rear bearing seat 2 and the oil cylinder seat 3 are of external structures, the rear bearing seat 2 is fixed on the shell 1 through bolts, the oil cylinder seat 3 is fixed on the outer side of the rear bearing seat 2, the front end cover 4 is fixed at the front end of the shell 1, so that the heavy-duty grinding motorized spindle forms a cylindrical structure, a rotatable mandrel 8 is arranged in the shell 1, the rear bearing seat 2 and the oil cylinder seat 3 through a first double-row cylindrical roller bearing group 5, a two-way thrust angular contact ball bearing group 6 and a second double-row cylindrical roller bearing group 7, a pull rod 9 in the mandrel 8 can move forwards and backwards, the pull rod 9 is matched with a pull claw assembly to realize quick assembly of a grinding tool, after the piston 11 contacts with the pull rod 9, the pull rod 9 moves forwards conveniently after being contacted with the piston 11, a motor rotor 12 on the mandrel 8 is matched with a motor stator 13 on the inner side of the shell 1, and power is provided for rotation of the mandrel 8.
Referring to the figure, the front end of the mandrel 8 is turned outwards, the outer end of the front spacer ring 14 is attached to the end of the mandrel 8, an inner spacer ring 15 and an outer spacer ring 16 are arranged between the double-row cylindrical roller bearing group I5 and the bidirectional angular thrust ball bearing group 6 at the front end for matching, the double-row cylindrical roller bearing group I5 and the bidirectional angular thrust ball bearing group 6 are separated, the inner spacer ring 15 and the outer spacer ring 16 are respectively assembled on the mandrel 8 and the shell 1 and are not contacted with each other, and are respectively propped against the inner ring and the outer ring of the double-row cylindrical roller bearing group I5 and the bidirectional angular thrust ball bearing group 6, so that the operation of the double-row cylindrical roller bearing group I5 and the bidirectional angular thrust ball bearing group 6 is not influenced, and meanwhile, the outer locking operation of the bidirectional angular thrust ball bearing group 6 is finished through a locking nut I17 installed on the mandrel 8, so that the front end structure of the mandrel 8 is stable.
Referring to fig. 3, a rear spacer 18 is arranged between the step surface of the mandrel 8 and the second cylindrical roller bearing group 7, the rear spacer 18 and the inner retainer ring of the bearing seat 2 are used for providing support for one side of the second cylindrical roller bearing group 7, and the other side of the second cylindrical roller bearing group 7 is used for fixing and limiting a second locking nut 25 and a rear bearing cover 19 which are contacted with the outer ring of the inner ring of the second cylindrical roller bearing group, so that the tail end structure of the mandrel 8 is stable.
Referring to fig. 4, the tail end of the claw 20 of the pull claw assembly contacts with the push block fixed on the pull rod 9, meanwhile, the inner side of the front end of the claw 20 is inclined, the upper end extends upwards to form a claw structure, the middle part of the claw 20 is attached to the protrusion on the inner side of the mandrel 8, external support is provided for the movement of the claw 20, when a cutter is assembled, the limit head 21 is firstly rotated outwards, then the pull rod 9 is driven by the piston 11 to move outwards, the long end on the inner side of the limit head 21 is inserted into the cutter, the cutter and the limit head 21 are synchronously moved in a limiting mode, the limit head 21 is rotated until the cutter is fixed, and the outer wall of the cutter is attached to the inner side of the claw 20, so that the installation of the cutter is completed.
The disc spring 23 arranged on the pull rod 9 provides rightward force for the pull rod 9, the pull rod 9 is in a stable state, and the tensioning and limiting effects are provided for the cutter positioned at the end part of the pull rod 9, so that the cutter is prevented from falling off.
The pull rod gland 24 at the tail end of the mandrel 8 provides the maximum movement limit for the tail end of the pull rod 9, the pull rod 9 can pass through the through hole on the pull rod gland 24, the step surface at the tail end of the pull rod 9 is contacted with the inner side of the pull rod gland 24, and the purpose of limiting the tail end of the pull rod 9 is achieved.
The working principle of the utility model is as follows:
An inner space ring 15 and an outer space ring 16 are arranged between the first double-row cylindrical roller bearing group 5 and the bidirectional thrust angular contact ball bearing group 6 to jointly form a front end support of the mandrel 8, the bearing group at the front end is arranged in the shell 1, the front space ring 14 is used for adjusting the axial direction position of the front end bearing group through grinding, the front end cover 4 is tightly pressed on the outer ring of the first double-row cylindrical roller bearing group 5 at the front end Zhou Chengzu, the first lock nut 17 is tightly pressed on the inner ring of the first double-row cylindrical roller bearing group 5, the framework is arranged in the front end cover 4 in a sealing way, external dust, grinding fluid and other impurities are prevented from entering the main shaft, and the sealing cover is fixed on the front end cover 4 through a set screw, so that the dustproof effect can be further achieved. The motor stator 13 is matched with the shell 1, the motor rotor 12 is installed on the mandrel 8 in an interference fit mode, the second double-row cylindrical roller bearing group 7 at the rear end is installed in the rear bearing seat 3, the front end is provided with a rear space ring 18, the rear bearing cover 19 presses the outer ring of the second double-row cylindrical roller bearing group 7, the second lock nut 25 presses the inner ring of the second double-row cylindrical roller bearing group 7, the cylinder seat 3, the piston 11 and the oil cylinder cover form a main shaft cutter system, the cutter system is provided with a pull rod 9, a pull claw assembly and a disc spring assembly, and the cutter ring 10 is fixed at the rear end of the pull rod 9.
In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, where "up," "down," "left," "right," etc. are merely used to indicate relative positional relationships, and when the absolute position of an object to be described changes, the relative positional relationships may change;
In the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other without conflict;
Finally, the above description is only of a preferred embodiment of the present utility model and is not intended to limit the utility model, it being understood that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (6)
1. A heavy-duty grinding motorized spindle comprises a shell (1) and is characterized in that a rear bearing seat (2) is fixed at the tail end of the shell (1) through a bolt, an oil cylinder seat (3) is fixed on the rear bearing seat (2) through a bolt, a front end cover (4) is fixed at the front end of the shell (1) through a bolt, a first double-row cylindrical roller bearing group (5), a two-way thrust angular contact ball bearing group (6) and a second double-row cylindrical roller bearing group (7) are sequentially arranged in the shell (1) and the rear bearing seat (2), a spindle (8) is movably arranged in the spindle (8), a pull rod (9) capable of moving forwards and backwards is arranged in the spindle (8), a pull claw assembly for fixing a grinding cutter is arranged at the front end of the pull rod (9), a cutter ring (10) is fixed at the tail end of the pull rod (9) through a bolt after the tail end of the pull rod (9) extends out of the spindle (8), the front end of a piston (11) in the oil cylinder seat (3) can be contacted with the tail of the cutter ring (10) under the hydraulic drive to be used for pushing the pull rod (9) to move forwards, a motor rotor (12) is arranged in the middle of the spindle (8) in an interference fit mode, and a motor rotor (1) is arranged on the inner side of the stator (12).
2. The heavy-duty grinding motorized spindle according to claim 1, wherein the front end of the spindle (8) is turned outwards, a front spacer ring (14) is attached to the inner side of the spindle, the first double-row cylindrical roller bearing group (5) is attached to the inner side of the front spacer ring (14), an inner spacer ring (15) and an outer spacer ring (16) are arranged between the first double-row cylindrical roller bearing group (5) and the bidirectional thrust angular contact ball bearing group (6), the inner spacer ring (15) is attached to the spindle (8), the outer spacer ring (16) is attached to the inner wall of the shell (1), and a locking nut (17) screwed on the spindle (8) is arranged on the outer side of the bidirectional thrust angular contact ball bearing group (6).
3. The heavy-duty grinding motorized spindle according to claim 2 is characterized in that a raised step surface structure is arranged on the mandrel (8), the front end of the rear spacer ring (18) is in contact with the step surface, a check ring which extends inwards is arranged on the rear bearing seat (2), one side end surface of the double-row cylindrical roller bearing group II (7) is in contact with the tail end of the rear spacer ring (18) and the check ring of the rear bearing seat (2), a rear bearing cover (19) is fixed on the outer side of the rear bearing seat (2) through bolts, the rear bearing cover (19) is tightly pressed on the outer ring of the double-row cylindrical roller bearing group II (7), a locking nut II (25) is screwed on the mandrel (8), and the locking nut II (25) is tightly pressed on the inner ring of the double-row cylindrical roller bearing group II (7).
4. The heavy-duty grinding motorized spindle of claim 3, wherein the pull claw assembly comprises a plurality of claw-shaped claws (20), two ends of the outer sides of the claw-shaped claws (20) are outwards protruded, the middle straight section of the claw-shaped claws (20) is attached to the protruding structure of the inner side of the mandrel (8), the front end of the pull rod (9) is provided with a limiting head (21) through threads, the front end of the limiting head (21) is outwards protruded, and a gap for installing a cutter is formed between the limiting head (21) and the claw-shaped claws (20).
5. The heavy-duty grinding motorized spindle of claim 4, wherein a disc spring mounting groove (22) is formed between the middle part of the pull rod (9) and the mandrel (8), the disc spring (23) is sleeved on the pull rod (9), one end of the disc spring (23) is contacted with the step surface on the inner side of the mandrel (8), and the other end is contacted with the step surface on the tail end of the pull rod (9).
6. The heavy-duty grinding motorized spindle as set forth in claim 5, wherein the tail end of the spindle (8) is provided with a pull rod gland (24) through threads, the tail end of the pull rod (9) penetrates through the pull rod gland (24), and the opening of the tail end of the spindle (8) is smaller than the through hole of the pull rod gland (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422910220.XU CN223519421U (en) | 2024-11-28 | 2024-11-28 | A heavy-duty grinding electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422910220.XU CN223519421U (en) | 2024-11-28 | 2024-11-28 | A heavy-duty grinding electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223519421U true CN223519421U (en) | 2025-11-07 |
Family
ID=97532724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422910220.XU Active CN223519421U (en) | 2024-11-28 | 2024-11-28 | A heavy-duty grinding electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223519421U (en) |
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2024
- 2024-11-28 CN CN202422910220.XU patent/CN223519421U/en active Active
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