CN217413334U - Spring pre-tensioning device at tail end of machine tool screw - Google Patents
Spring pre-tensioning device at tail end of machine tool screw Download PDFInfo
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- CN217413334U CN217413334U CN202220799271.8U CN202220799271U CN217413334U CN 217413334 U CN217413334 U CN 217413334U CN 202220799271 U CN202220799271 U CN 202220799271U CN 217413334 U CN217413334 U CN 217413334U
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- spacer ring
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Abstract
The utility model relates to a ball screw technical field, concretely relates to lathe screw tail end spring prestretches device, including ball screw, bearing frame, nut and end cover, the bearing housing is established at ball screw's tail end, ball screw's tail end passes the bearing and is locked by the nut, the bearing frame cover is established in week side of bearing, the bearing frame is close to the one end of nut and is connected with the end cover is fixed, the bearing frame is close to ball screw rod body's one end and extends to ball screw lateral wall along its radial direction so that bearing frame, bearing and ball screw enclose into an accommodation space, be equipped with the elastic component in the accommodation space, the both ends of elastic component are along ball screw axial butt bearing frame and bearing respectively; the bearing seat is provided with an oil duct, the oil duct radially penetrates through the side wall of the bearing seat along the bearing seat, and the position of the oil duct corresponds to that of the bearing.
Description
Technical Field
The utility model relates to a ball screw technical field, concretely relates to lathe screw rod tail end spring prestretches device.
Background
The ball screw is as digit control machine tool feed system's key part, and during operation, parts motion in-process frictional heating such as bearing, screw rod, nut can lead to the temperature to rise, and the screw rod can produce an elongation along its axial, but because the both ends of screw rod all can't be extended by fixed, under this condition, the screw rod can take place bending deformation, influences the transmission work of screw rod to influence feed system's positioning accuracy, and then influence the machining precision of part.
Prior art CN201520029389.2 discloses a mechanical screw rod prestretching mechanism, including ball screw, ball screw one end is connected with the transmission seat, and the other end is connected with the tail end seat, installs the nut seat in the middle, transmission seat and ball screw between be provided with first oil blanket, first ball bearing, first spacer ring, first bearing lid and first nut, be provided with second oil blanket, second ball bearing, disc spring, second spacer ring, second nut and second bearing lid between tail end seat and the ball screw. The butterfly spring is arranged, and when the butterfly spring is installed, a pretension force is applied to the screw in advance, so that the screw is extended by a certain amount, and the thermal deformation of the screw is avoided. Although the technical scheme solves the problem of positioning precision of the screw, the problem of friction of components such as a bearing, the screw and a nut in the operation process is not solved, so that the ball screw not only continuously generates heat in the operation process, but also the stability and the transmission precision of connection among the components are influenced by long-time mutual friction among the components, and finally the processing precision of the components is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art not enough, provide a machine tool screw rod tail end spring prestretches device, its frictional force through reducing between each part of ball screw is piled up in order to alleviate or to obstruct because of the heat that the friction produced, and then improves the transmission precision problem under connection stability and the long-time work.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a spring pre-tensioning device for the tail end of a screw rod of a machine tool comprises a ball screw rod, a bearing seat, a nut and an end cover, wherein the bearing is sleeved at the tail end of the ball screw rod, the tail end of the ball screw rod penetrates through the bearing and is locked by the nut, the bearing seat is sleeved on the periphery of the bearing, one end, close to the nut, of the bearing seat is fixedly connected with the end cover, one end, close to a rod body of the ball screw rod, of the bearing seat extends towards the side wall of the ball screw rod along the radial direction of the end of the ball screw rod to enable the bearing seat, the bearing and the ball screw rod to form an accommodating space in a surrounding mode, an elastic piece is arranged in the accommodating space, and two ends of the elastic piece are respectively abutted to the bearing seat and the bearing along the axial direction of the ball screw rod;
the bearing seat is provided with an oil duct, the oil duct penetrates through the side wall of the bearing seat along the radial direction of the bearing seat, and the position of the oil duct corresponds to that of the bearing.
Further, the bearing is provided with a plurality of, and a plurality of bearing sets up side by side along the ball screw axial.
Furthermore, the tail end of the ball screw is sleeved with a spacer ring, the spacer ring comprises an inner spacer ring and an outer spacer ring which are sequentially sleeved from inside to outside along the radial direction of the ball screw, a channel is formed in the outer spacer ring, the channel penetrates through the side wall of the outer spacer ring along the radial direction of the outer spacer ring, and the position of the channel corresponds to the position of the oil duct.
Further, the spacer ring is located between and abuts two adjacent bearings.
Furthermore, the tail end of the ball screw is sleeved with an elastic piece spacer ring, the elastic piece spacer ring is arranged in the containing space, two ends of the elastic piece spacer ring are respectively abutted to the bearing seat and the bearing along the axial direction of the ball screw, one end of the elastic piece spacer ring, which is close to the rod body of the ball screw, is provided with a groove, and the elastic piece is arranged in the groove, and two ends of the elastic piece spacer ring are respectively abutted to the bearing seat and the groove wall along the axial direction of the ball screw.
Furthermore, a screw spacer ring is arranged between the ball screw and the elastic element spacer ring, and the screw spacer ring is sleeved at the tail end of the ball screw.
Furthermore, the outer side of the screw rod spacer ring is sleeved with a spring washer, and the spring washer is located between the elastic piece spacer ring and the bearing seat along the radial direction of the ball screw rod.
Furthermore, an outer cover is fixed at one end, far away from the bearing seat, of the end cover.
Furthermore, a dustproof sleeve is arranged at the end part, close to the ball screw rod body, of the bearing seat, the dustproof sleeve is sleeved on the ball screw rod, and an O-shaped ring is arranged between the dustproof sleeve and the ball screw rod.
Furthermore, a clamping groove is formed in the end portion, close to the ball screw rod body, of the bearing seat, and a protrusion matched with the clamping groove is arranged on the dustproof sleeve.
The utility model has the advantages that:
the utility model discloses provide at current design elastic component and prestrain the power, on avoiding ball screw thermal deformation's basis, set up the oil duct on the bearing frame, pour into lubricating oil through the oil duct and reduce the friction between each part in order to lubricate parts such as bearing, ball screw, not only reduce thermal production, improved the stability and the transmission precision of connecting between each part moreover, and then improved the machining precision.
Drawings
FIG. 1 is a schematic structural diagram of a spring pre-tensioning device at the tail end of a screw of a machine tool in an embodiment.
Reference numerals:
the anti-vibration bearing comprises a ball screw 1, a screw spacer ring 11, an O-shaped ring 12, a bearing 2, a bearing seat 3, an oil duct 31, a screw cap 4, an end cover 5, an elastic piece spacer ring 6, an elastic piece 61, a spring washer 62, an inner spacer ring 7, an outer spacer ring 8, a channel 81, an outer cover 9 and a dust-proof sleeve 10.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model solved more clearly understand, combine the embodiment below, it is right the utility model discloses further detailed description proceeds. It should be understood, however, that the description herein of specific embodiments is for the purpose of illustration only and is not intended to limit the invention.
The utility model provides a device is prestretched to lathe screw rod tail end spring, including ball screw 1, a plurality of bearings 2, bearing frame 3, nut 4, end cover 5 and enclosing cover 9, as shown in figure 1, ball screw 1 includes the pole body as ball screw 1 main part and is located the tail end of pole body tip, a plurality of bearings 2 overlap side by side along ball screw 1's axial and establish the tail end at ball screw 1, after ball screw 1's tail end passed a plurality of bearings 2 side by side, the tip of its tail end is locked by nut 4, bearing frame 3 cover is established in the week side of a plurality of bearings 2 side by side, and its one end that is close to ball screw 1's tail end tip is fixed with end cover 5, the one end of end cover 5 that faces away from bearing frame 3 is fixed with enclosing cover 9, bearing frame 3, end cover 5, enclosing cover 9 three pass through bolt fixed connection.
In order to solve the problems of thermal deformation of the ball screw 1, poor connection stability among various components and the like caused by friction in the operation process of the components such as the ball screw 1, the bearing 2 and the like, the tail end of the screw of the machine tool is designed into the following structure:
on one hand, the embodiment designs a pre-tensioning mechanism, specifically: one end of the bearing seat 3 close to the ball screw 1 rod body extends along the radial direction of the bearing seat 3 to the side wall direction of the ball screw 1 to form an end wall at the end part of the side wall of the bearing seat 3 close to the ball screw 1 rod body, there is a distance between the end wall of the bearing seat 3 and the nearest bearing 2, thereby making the end wall of the bearing 3, a bearing 2 close to the end wall of the bearing seat 3, the ball screw 1 three encloses into a containing space, an elastic piece spacer ring 6 arranged on the ball screw 1 in the containing space, the two ends of the elastic piece spacer ring 6 respectively abut against the end wall of the bearing seat 3 and the bearing 2 along the axial direction of the ball screw 1, one end of the elastic piece spacer ring 6 abutting against the end wall of the bearing seat 3 is provided with a groove, the elastic piece 61 is arranged in the groove and the two ends thereof respectively abut against the end wall of the bearing seat 3 and the groove wall along the axial direction of the ball screw 1. By designing the pre-tensioning mechanism, when the ball screw 1 is mounted, a pre-tensioning force is firstly applied to the ball screw 1, so that the ball screw 1 is extended by a certain amount, and the thermal deformation of the ball screw 1 is avoided.
The elastic member 61 of this embodiment may be a spring, and a spring washer 62 is disposed between the spring and the end wall of the bearing seat 3, and the spring washer 62 is sleeved on the ball screw 1. The cushioning effect of the spring washer 62 enables the spring to be stressed evenly.
In order to avoid the influence of the elastic material spacer 6 on the transmission of the ball screw 1, a screw spacer 11 fitted over the ball screw 1 is provided between the ball screw 1 and the elastic material spacer 6.
On the other hand, this embodiment has designed lubricated mechanism, specifically is: the tail end cover of ball screw 1 is equipped with the spacer ring, just along 1 axial of ball screw and two bearing 2 butts between two adjacent bearings 2 of spacer ring, the spacer ring includes radially from inside to outside inner spacer ring 7 and the outer spacer ring 8 of establishing of overlapping in proper order along ball screw 1, passageway 81 has been seted up on the outer spacer ring 8, passageway 81 radially runs through the lateral wall of outer spacer ring 8 along outer spacer ring 8, oil duct 31 has been seted up on bearing frame 3, oil duct 31 radially runs through the lateral wall of bearing frame 3 along bearing frame 3, the position of oil duct 31 is corresponding with passageway 81's position. Lubricating oil is injected through the oil channel 31 and the channel 81 to lubricate the bearing 2, the ball screw 1 and other parts so as to reduce friction among the parts, so that not only is heat generated reduced, but also the connection stability and the transmission precision among the parts are improved, and further the processing precision is improved.
As shown in fig. 1, the present embodiment further designs a dust-proof sleeve 10, the dust-proof sleeve 10 is sleeved on the ball screw 1 and sleeved on the end portion of the bearing seat 3 with the end wall, so that one end of the bearing seat 3 is covered by the dust-proof sleeve 10, and the other end is covered by the outer cover 9, thereby preventing impurities such as dust from entering.
In order to improve the protection effect of the dust-proof sleeve 10, an O-ring 12 is arranged between the dust-proof sleeve 10 and the ball screw 1. Secondly, the end part of the bearing seat 3 provided with the end wall is provided with a clamping groove, and the dustproof sleeve 10 is provided with a bulge matched with the clamping groove. This protective structure makes dustproof effect improve by a wide margin through the closely cooperating of arch and draw-in groove and the sealed of O type circle 12.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a lathe screw tail end spring prestretches device, includes ball screw, bearing frame, nut and end cover, the bearing housing is established the tail end of ball screw, the tail end of ball screw passes the bearing and by the nut locking, the bearing frame cover is established all sides of bearing, the bearing frame is close to the one end and the end cover fixed connection of nut, the bearing frame is close to the one end of ball screw pole body and extends to ball screw lateral wall along its radial so that bearing frame, bearing and ball screw three enclose into an accommodation space, be equipped with the elastic component in the accommodation space, the both ends of elastic component are along ball screw axial butt bearing frame and bearing respectively, its characterized in that:
the bearing seat is provided with an oil duct, the oil duct radially penetrates through the side wall of the bearing seat along the bearing seat, and the position of the oil duct corresponds to that of the bearing.
2. The machine tool screw tail end spring pre-tensioning device according to claim 1, characterized in that: the bearing is equipped with a plurality ofly, and is a plurality of the bearing sets up side by side along ball screw axial.
3. The machine tool screw tail end spring pre-tensioning device according to claim 2, characterized in that: the ball screw is characterized in that a spacer ring is sleeved at the tail end of the ball screw, the spacer ring comprises an inner spacer ring and an outer spacer ring which are sequentially sleeved from inside to outside along the radial direction of the ball screw, a channel is formed in the outer spacer ring, the channel penetrates through the side wall of the outer spacer ring along the radial direction of the outer spacer ring, and the position of the channel corresponds to the position of the oil duct.
4. The machine tool screw tail end spring pre-tensioning device according to claim 3, characterized in that: the spacer ring is positioned between two adjacent bearings and is abutted against the two bearings.
5. The machine tool screw tail end spring pre-tensioning device according to claim 1, characterized in that: the elastic piece spacer ring is arranged at the tail end of the ball screw in a sleeved mode, the elastic piece spacer ring is arranged in the containing space, two ends of the elastic piece spacer ring are respectively abutted to the bearing seat and the bearing along the axial direction of the ball screw, a groove is formed in one end, close to the rod body of the ball screw, of the elastic piece spacer ring, and two ends of the elastic piece are respectively abutted to the bearing seat and the groove wall along the axial direction of the ball screw.
6. The machine tool screw tail end spring pre-tensioning device according to claim 5, characterized in that: and a screw rod space ring is arranged between the ball screw and the elastic piece space ring, and the screw rod space ring is sleeved at the tail end of the ball screw.
7. The machine tool screw tail end spring pre-tensioning device according to claim 6, characterized in that: the outer side of the screw rod space ring is sleeved with a spring washer, and the spring washer is located between the elastic piece space ring and the bearing seat along the radial direction of the ball screw rod.
8. The machine tool screw tail end spring pre-tensioning device according to claim 1, characterized in that: and an outer cover is fixed at one end of the end cover, which is far away from the bearing seat.
9. The machine tool screw tail end spring pre-tensioning device according to claim 1, characterized in that: the end part of the bearing seat, which is close to the ball screw rod body, is provided with a dustproof sleeve, the dustproof sleeve is sleeved on the ball screw rod, and an O-shaped ring is arranged between the dustproof sleeve and the ball screw rod.
10. The machine tool screw tail end spring pre-tensioning device according to claim 9, characterized in that: the end part of the bearing seat close to the ball screw rod body is provided with a clamping groove, and the dustproof sleeve is provided with a bulge matched with the clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220799271.8U CN217413334U (en) | 2022-04-07 | 2022-04-07 | Spring pre-tensioning device at tail end of machine tool screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220799271.8U CN217413334U (en) | 2022-04-07 | 2022-04-07 | Spring pre-tensioning device at tail end of machine tool screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217413334U true CN217413334U (en) | 2022-09-13 |
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ID=83183911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220799271.8U Active CN217413334U (en) | 2022-04-07 | 2022-04-07 | Spring pre-tensioning device at tail end of machine tool screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217413334U (en) |
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2022
- 2022-04-07 CN CN202220799271.8U patent/CN217413334U/en active Active
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