CN212264553U - Locking device for electric spindle bearing of hard turning and milling machine tool - Google Patents
Locking device for electric spindle bearing of hard turning and milling machine tool Download PDFInfo
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- CN212264553U CN212264553U CN202020969957.8U CN202020969957U CN212264553U CN 212264553 U CN212264553 U CN 212264553U CN 202020969957 U CN202020969957 U CN 202020969957U CN 212264553 U CN212264553 U CN 212264553U
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- end cover
- wrench
- locking device
- locking block
- pretightning force
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Abstract
The utility model relates to a locking device of hard milling machine electricity main shaft bearing for twist the pretightning force end cover of electricity main shaft, be equipped with the screw hole on the outer terminal surface of pretightning force end cover, locking device is including connecting latch segment, connecting bolt and torque wrench, it is used for being connected with the pretightning force end cover to connect the latch segment, set up the positioning hole who corresponds with the screw hole on the terminal surface of connecting the latch segment, the medial surface of connecting the latch segment is for being used for the end cover contact surface with bearing the laminating of pretightning force end cover, the outside terminal surface is the spanner face, spanner connection structure has been seted up on the spanner face, set up the vallecular cavity that is used for holding the dabber of electricity main shaft on the end cover contact surface, connecting bolt passes positioning hole and screw hole, will connect the latch segment and pretightning force end cover fixed connection, torque wrench and spanner connection, And the rotation center is positioned on the axis of the pre-tightening end cover.
Description
Technical Field
The utility model relates to a machinery installation field, concretely relates to locking device of hard milling machine tool electricity main shaft bearing of hard car.
Background
In the process of machining parts of a constant velocity universal joint transmission shaft, a hard turning and hard milling machine tool is key equipment for machining a spherical surface and a ball path of a fixed joint, and an electric spindle is a key execution part of the hard turning and hard milling equipment. In the past decade, the maintenance of the electric spindle completely depends on foreign technologies and machine tool manufacturers, the domestic electric spindle maintenance technology is rapidly developed in recent years, the technology also tends to be mature, the self-repair of the electric spindle can realize short maintenance period and low maintenance cost, and the practical cost-reducing and efficiency-improving achievement is brought to companies.
The maintenance of the current electric main shaft has some technical difficulties, including the measurement and installation of the pretightening force of a precise angular contact ball bearing, as shown in the attached drawing 1, the electric main shaft 1 comprises a core shaft 11, a bearing 12, a bearing spacer ring 13 and a pretightening force end cover 14 which are sleeved on the upper core shaft 11, the pretightening force end cover 14 is screwed rightwards to realize the pretightening work of the bearing 12, wherein the pretightening force of the bearing can directly influence the service performance of the main shaft, the bearing 12 is over-tightened due to over-large pretightening force, the inner ring and the outer ring of the bearing 12 generate a certain deformation to influence the assembly precision of the main shaft, the heating of the bearing 12 is accompanied with continuous temperature rise in the high-speed rotation process of the main shaft, the rolling bodies of the bearing 12 are not in complete contact with the inner ring and the outer ring due to over-small pretightening, therefore, the bearing pretightening force is an important index influencing the performance of the main shaft after assembly.
In the maintenance work of the existing electric spindle, the pre-tightening end cover is rotated through a square bearing pre-tightening force piece, the existing bearing pre-tightening force piece is connected with the pre-tightening end cover 14 through a phi 5 steel pin, and then the heavy pipe wrench is used for rotating the bearing pre-tightening force piece to lock the pre-tightening end cover 14. The connection between the bearing pretightening force piece and the pretightening force end cover 14 is not stable enough, and in the pretightening working process, the pretightening force is completely controlled through experience, so that quantitative output cannot be formed, and even if the experience is rich, accurate control cannot be achieved.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the to-be-solved technical problem of the utility model is to provide a locking device of hard milling machine tool electricity main shaft bearing is connected reliable and stable with the pretightning force end cover, and conveniently carries out the quantization control of pretightning force.
In order to achieve the above object, the utility model provides a locking device of hard milling machine tool electricity main shaft bearing for twist the pretightning force end cover of electricity main shaft, be equipped with the screw hole on the outer terminal surface of pretightning force end cover, locking device is including connecting latch segment, connecting bolt and torque wrench, it is used for being connected with the pretightning force end cover to connect the latch segment, set up the positioning hole that corresponds with the screw hole on the terminal surface of connecting the latch segment, the medial extremity face of connecting the latch segment is for being used for with the end cover contact surface that holds the laminating of pretightning force end cover, the outside terminal surface is the spanner face, spanner connection structure has been seted up on the spanner face, set up the vallecular cavity that is used for holding the dabber of electricity main shaft on the end cover contact surface, connecting bolt passes positioning hole and screw hole, will connect the latch segment and the fixed connection of pretightning force end, And the rotation center is positioned on the axis of the pre-tightening end cover.
Further, the wrench connecting structure is a wrench interface arranged on the wrench surface.
Furthermore, the connecting locking block is a regular hexagonal block, and the wrench connecting structure is located in the center of the wrench face.
Furthermore, the slot cavity is circular, the center line of the slot cavity is located on the center line of the connecting locking block, and the diameter of the slot cavity is larger than that of the mandrel of the electric spindle.
Furthermore, the number of the positioning through holes on the connecting locking block is four.
As described above, the locking device of the present invention has the following advantageous effects:
through setting up the connection latch segment, connecting bolt, and torque wrench, utilize connection latch segment and connecting bolt to be connected with the firm cooperation of pretightning force end cover, it is reliable and stable to connect, then use torque wrench and spanner connection structure cooperation to be connected well, rotate torque wrench, rotate the pretightning force end cover through connecting the latch segment and lock, and connect the latch segment in the pretensioning course of the work and can not interfere with the dabber, high durability and convenient use is nimble, in the pretensioning course of the work, can be through the moment of torsion of control torque wrench, the size of effective control bearing pretightning force, realize the quantization output of bearing pretightning force, prevent that the pretightning force is too big or the undersize from.
Drawings
Fig. 1 is a schematic view of the locking device of the present invention during operation.
Fig. 2 is a schematic structural view of the connection locking block of the present invention at a certain angle.
Fig. 3 is a schematic structural view of the connection locking block of the present invention at a certain angle.
Fig. 4 is an assembly schematic view of the connection locking block and the torque wrench of the present invention.
Description of the element reference numerals
1 electric spindle
11 mandrel
12 bearing
13 bearing spacer ring
14 pretightening force end cover
141 threaded hole
2 connecting locking block
21 end cap contact surface
22 spanner surface
23 positioning through hole
24 spanner interface
25 groove cavity
3 connecting bolt
4 torque spanner
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be considered as the scope of the present invention without substantial changes in the technical content.
Referring to fig. 1 to 4, the utility model provides a locking device of hard milling machine electric main shaft bearing of hard car for twist the pretightning force end cover 14 on the electric main shaft 1, lock bearing 12, pretightning force end cover 14 is located the tip of the dabber 11 of electric main shaft 1, is equipped with screw hole 141 on the outer terminal surface of pretightning force end cover 14. The utility model discloses a locking device is including connecting latch segment 2, connecting bolt 3, and torque wrench 4, it is used for being connected with pretightning force end cover 14 to connect latch segment 2, set up the positioning hole 23 that corresponds with screw hole 141 on the terminal surface of latch segment 2 to be connected, the end cover contact surface 21 of the medial surface of connecting latch segment 2 for being used for with bearing the 14 laminatings of pretightning force end cover, the outside terminal surface is wrench face 22, wrench connection structure has been seted up on wrench face 22, set up the vallecular cavity 25 that is used for holding electric main shaft 1's dabber 11 on the end cover contact surface 21, connecting bolt 3 passes positioning hole 23 and screw hole 141, to connect latch segment 2 and 14 fixed connection of pretightning force end cover, torque wrench 4 is connected with wrench connection structure, and its rotation center is located pretightning force end cover 14 axis.
The utility model relates to a locking device's principle does: the size and the position of a positioning through hole 23 on a connecting locking block 2 are determined according to the size and the position of a threaded hole 141 on a pre-tightening force end cover 14, when a bearing 12 needs to be pre-tightened, referring to fig. 1, the positioning through hole 23 on the connecting locking block 2 is aligned with the threaded hole 141 on the outer end face of the pre-tightening force end cover 14, a connecting bolt 3 penetrates through the positioning through hole 23 and is screwed into the threaded hole 141, the connecting bolt 3 is screwed, the connecting locking block 2 is fixedly connected with the pre-tightening force end cover 14, an end cover contact surface 21 of the connecting locking block 2 is kept attached to the outer end face of the pre-tightening force end cover 14, and then a torque wrench 4 is matched and connected with a wrench connecting structure, wherein the position of the wrench connecting structure on the connecting locking block is also determined according to actual conditions, so that when the connecting locking block 2, i.e., the center of rotation of the torque wrench 4 is located on the preload cap 14 axis. Then, the torque wrench 4 is rotated, the pretightening force end cover 14 is rotated through the connecting locking block 2 for locking, the torque wrench 4 has a torque degree, the size of the pretightening force of the bearing 12 can be effectively controlled by controlling the torque of the torque wrench 4, the visual quantitative output of the pretightening force is realized, and the bearing 12 is prevented from failing in the machining process of the main shaft due to the fact that the pretightening force is too large or too small. In the locking process, the pretightening force end cover 14 moves to the right by a distance, and the depth of the groove cavity 25 on the end cover contact surface 21 is selected to be proper according to the distance, so that the connecting locking block 2 cannot interfere with the mandrel 11 in the pretightening work process.
The utility model discloses in, refer to fig. 2 to 4, connect the form of latch segment 2 upper wrench connection structure, according to the joint form of 4 heads of torque wrench confirm, both keep the cooperation can, specifically in this embodiment, wrench connection structure is for offering wrench end 24 on wrench face 22, and the joint of 4 heads of torque wrench is a square head piece, and the cartridge is in wrench end 24. In other embodiments, the wrench connecting structure may be a square block structure, and the corresponding joint of the torque wrench head may be a socket structure.
In the present embodiment, referring to fig. 1 and 2, the connecting locking block 2 is a regular hexagonal block, the wrench connecting structure is located at the center of the wrench face 22, and the number of the positioning through holes 23 is four, and the connecting locking block 2 is arranged in an annular array around the center line of the connecting locking block 2. The connecting locking block 2 is of a regular hexagon, and in the process of disassembling the pre-tightening force end cover 14 (torque does not need to be strictly controlled at the moment), an ordinary wrench can be clamped on the side face of the connecting locking block 2 to be screwed, and the regular hexagon can conveniently adjust the installation position of the ordinary wrench.
Further, in this embodiment, referring to fig. 2, the slot cavity 25 is circular, the center line of the slot cavity is located at the center of the end cover contact surface 21, that is, located on the axis of the preload end cover 14, and the diameter of the slot cavity 25 is larger than the diameter of the core shaft 11 accommodating the electric spindle 1, so that the size of the slot cavity 25 can be minimized as much as possible, and the overall strength of the connecting locking block 2 is not affected.
By last, the utility model discloses a locking device uses and connects latch segment 2 and connecting bolt 3 and the firm cooperation of pretightning force end cover 14 to be connected, connects reliable and stable, then cooperates torque wrench 4 to carry out bearing 12 locking, can the 12 pretightning force sizes of effective control bearing, prevents that the pretightning force is too big or the undersize from leading to the inefficacy of bearing 12 in the main shaft course of working. Compared with the existing design, the device can avoid mechanical damage to the end cover caused by knocking the pretightening force end cover 14 by a punch pin in the dismounting process and influence the precision of the main shaft. By adopting the locking device, the output of quantification can be realized, and support is provided for subsequent experience transfer and standardized assembly operation.
To sum up, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. The utility model provides a locking device of hard milling machine tool electricity main shaft bearing for twist pretightning force end cover (14) of moving electric main shaft (1), be equipped with screw hole (141) on the outer terminal surface of pretightning force end cover (14), its characterized in that: the locking device comprises a connecting locking block (2), a connecting bolt (3) and a torque wrench (4), wherein the connecting locking block (2) is used for being connected with a pre-tightening force end cover (14), a positioning through hole (23) corresponding to a threaded hole (141) is formed in the end face of the connecting locking block (2), the inner side end face of the connecting locking block (2) is an end cover contact surface (21) for being attached to the pre-tightening force end cover (14), and the outer side end face of the connecting locking block is a wrench surface (22), a wrench connecting structure is formed in the wrench surface (22), a groove cavity (25) used for containing a mandrel (11) of an electric spindle (1) is formed in the end cover contact surface (21), the connecting bolt (3) penetrates through the positioning through hole (23) and the threaded hole (141) to fixedly connect the connecting locking block (2) with the pre-tightening force end cover (14), and the torque wrench (4) is connected with the wrench connecting structure, And the rotation center of the pre-tightening end cover is positioned on the axis of the pre-tightening end cover (14).
2. The locking device of claim 1, wherein: the wrench connecting structure is a wrench interface (24) arranged on the wrench surface (22).
3. The locking device of claim 1, wherein: the connecting and locking block (2) is a regular hexagonal block, and the wrench connecting structure is positioned in the center of the wrench face (22).
4. A locking device according to claim 3, wherein: the groove cavity (25) is circular, the center line of the groove cavity is located on the center line of the connecting locking block (2), and the diameter of the groove cavity (25) is larger than that of a mandrel (11) of the electric spindle (1).
5. The locking device of claim 1, wherein: the number of the positioning through holes (23) on the connecting locking block (2) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020969957.8U CN212264553U (en) | 2020-06-01 | 2020-06-01 | Locking device for electric spindle bearing of hard turning and milling machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020969957.8U CN212264553U (en) | 2020-06-01 | 2020-06-01 | Locking device for electric spindle bearing of hard turning and milling machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212264553U true CN212264553U (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020969957.8U Active CN212264553U (en) | 2020-06-01 | 2020-06-01 | Locking device for electric spindle bearing of hard turning and milling machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212264553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116372201A (en) * | 2023-05-13 | 2023-07-04 | 惠州市速锋科技有限公司 | Motorized spindle structure of numerical control machining center |
-
2020
- 2020-06-01 CN CN202020969957.8U patent/CN212264553U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116372201A (en) * | 2023-05-13 | 2023-07-04 | 惠州市速锋科技有限公司 | Motorized spindle structure of numerical control machining center |
| CN116372201B (en) * | 2023-05-13 | 2023-11-03 | 惠州市速锋科技有限公司 | Motorized spindle structure of numerical control machining center |
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