CN219692671U - Ball screw transmission connecting device and measuring machine - Google Patents
Ball screw transmission connecting device and measuring machine Download PDFInfo
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- CN219692671U CN219692671U CN202320080721.2U CN202320080721U CN219692671U CN 219692671 U CN219692671 U CN 219692671U CN 202320080721 U CN202320080721 U CN 202320080721U CN 219692671 U CN219692671 U CN 219692671U
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- ball screw
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- 230000005489 elastic deformation Effects 0.000 claims description 26
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 230000002411 adverse Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a ball screw transmission connecting device and a three-coordinate measuring machine, which can solve the problem that deflection and radial swing of a screw in the prior art influence the precision of the measuring machine. The ball screw transmission connecting device comprises a screw, a screw assembly, a connecting assembly, a vertical shaft and a transverse shaft, wherein the connecting assembly comprises a first connecting part and a second connecting part, a first vertical linear bearing is arranged on the first connecting part, and a second horizontal linear bearing is arranged on the second connecting part; the vertical shaft is fixedly connected with the nut assembly and is in sliding fit with the first linear bearing; the transverse shaft is fixedly connected with the first connecting component and is in sliding fit with the second linear bearing. The ball screw transmission connecting device can realize flexible transmission connection of the moving part and the screw, and ensure the stability of the screw transmission process and the moving stability of the moving part, thereby improving the measuring accuracy of the measuring machine.
Description
Technical Field
The utility model belongs to the technical field of mechanical equipment, and particularly relates to a ball screw transmission connecting device and a measuring machine with the same.
Background
The three-coordinate measuring machine driven by the ball screw can realize high-speed and accurate in-place movement of the moving parts of the measuring machine. The ball screw has very high assembly requirements, and generally adopts an installation mode that two ends are fixed and a bearing is supported. The screw rod can generate deflection due to the influence of other factors such as gravity, and further the transmission precision can be influenced.
For a ball screw with a large stroke, the screw can be prestretched to reduce the influence of deflection; the rigidity of the screw can be improved by selecting a ball screw with a large diameter, but the existence of deflection cannot be eliminated.
In the movement process of the measuring machine, as the moving part which moves through the transmission of the screw rod and the screw nut are generally in rigid connection, the deflection and radial swing of the screw rod can deform the moving part, thereby influencing the compensation data of the measuring machine.
And deflection and radial swing of the lead screw can also generate the phenomenon of 'other power' on the moving part, so that the moving part of the measuring machine generates internal stress, the stress can be gradually released along with the use process of the measuring machine, and the laser compensation data deviation is caused, thereby bringing adverse effects on the precision of the measuring machine.
Disclosure of Invention
The utility model provides a ball screw transmission connecting device and a three-coordinate measuring machine, which can solve the problem that deflection and radial swing of a screw in the prior art influence the precision of the measuring machine.
In order to solve the technical problems, the technical scheme adopted by the ball screw transmission connecting device provided by the utility model is that the ball screw transmission connecting device comprises:
a screw rod horizontally arranged;
the screw assembly is in transmission connection with the screw rod, and the screw rod drives the screw assembly to axially move along the screw rod when rotating;
the connecting assembly comprises a first connecting part and a second connecting part, wherein a first linear bearing which is vertically arranged is arranged on the first connecting part, and a second linear bearing which is horizontally arranged is arranged on the second connecting part;
the vertical shaft is vertically arranged and fixedly connected to the nut assembly, and the vertical shaft is in sliding fit with the first linear bearing;
the horizontal shaft is horizontally arranged, the axis of the horizontal shaft is perpendicular to the axis of the screw rod, and the horizontal shaft is fixedly connected to the first connecting component and is in sliding fit with the second linear bearing.
The first connecting component comprises a vertical shaft connecting part and a transverse shaft connecting part, the transverse shaft connecting part is positioned above the vertical shaft connecting part, the first linear bearing is arranged on the vertical shaft connecting part, and the transverse shaft is fixedly connected with the transverse shaft connecting part.
The U-shaped clearance part is formed on the transverse shaft connecting part, the inverted U-shaped clearance part is formed on the second connecting part, the inverted U-shaped clearance part is intersected with the U-shaped clearance part, so that the second connecting part is spanned on the first connecting part, the vertical shaft connecting part and the first linear bearing are located in the inverted U-shaped clearance part, and the second linear bearing is located in the U-shaped clearance part.
The vertical shaft connecting portion is provided with a vertical mounting hole and a first elastic deformation avoidance gap communicated with the vertical mounting hole, the first elastic deformation avoidance gap penetrates through the vertical shaft connecting portion, the first linear bearing is mounted in the vertical mounting hole, and the first linear bearing penetrates through the first elastic deformation avoidance gap to be fastened.
The second connecting part is provided with a horizontal mounting hole and a second elastic deformation avoidance gap communicated with the horizontal mounting hole, the second elastic deformation avoidance gap penetrates through the second connecting part, and the second linear bearing is installed in the horizontal mounting hole and penetrates through the second elastic deformation avoidance gap to be fastened through a second fastening piece.
The nut assembly comprises a nut and a nut connecting seat, the nut is matched with the screw rod in a transmission mode, the nut connecting seat is fixedly connected with the nut into a whole, the nut connecting seat is provided with a horizontal top surface, and the bottom end of the vertical shaft is fixedly connected to the horizontal top surface of the nut connecting seat.
The nut connecting seat is provided with a mounting groove with an arc-shaped cross section, the mounting groove penetrates through the nut connecting seat along the axial direction of the nut, and the nut is positioned in the mounting groove and is coaxially arranged with the mounting groove.
One end of the nut is provided with a connecting part, and the connecting part is fixedly connected with the corresponding end face screw of the nut connecting seat.
The utility model also provides a measuring machine which comprises a moving part and a ball screw transmission connecting device, wherein the ball screw transmission connecting device is in transmission connection with the moving part to drive the moving part to move, and the ball screw transmission connecting device is the ball screw transmission connecting device.
The moving part is a carriage.
Compared with the prior art, the utility model has the following advantages and positive effects:
the ball screw transmission connecting device comprises a screw, a screw assembly, a connecting assembly, a vertical shaft and a transverse shaft, wherein the connecting assembly comprises a first connecting part and a second connecting part, the first connecting part is used for connecting the screw assembly, the second connecting part is used for connecting a moving part to be transmitted, a first straight line bearing which is vertically arranged is arranged on the first connecting part, and a second straight line bearing which is horizontally arranged is arranged on the second connecting part; the vertical shaft is fixedly connected with the nut assembly and is in sliding fit with the first linear bearing; the horizontal shaft is horizontally arranged, the axis of the horizontal shaft is vertical to the axis of the screw rod, the horizontal shaft is fixedly connected to the first connecting component and is in sliding fit with the second linear bearing, and then the moving component is connected with the screw rod component through the two linear bearings which are horizontally arranged and vertically arranged, so that the moving component can freely slide in the vertical and horizontal directions relative to the screw rod, the flexible transmission connection of the moving component and the screw rod is realized, adverse effects of deflection deformation or radial swing of the screw rod on the moving component can be weakened or even offset, deformation of the moving component is effectively prevented, the 'other strength' is prevented from being generated on the movement of the moving component, the stability of the screw rod transmission process and the moving stability of the moving component are guaranteed, and the measuring accuracy of the measuring machine can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a perspective view of a ball screw drive connection in accordance with an embodiment of the present utility model;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a perspective view of a coupling assembly, vertical and horizontal shaft assembly from a perspective in accordance with an embodiment of the present utility model;
FIG. 4 is a perspective view of another view of the coupling assembly, vertical and horizontal shaft assembly in accordance with an embodiment of the present utility model;
FIG. 5 is a perspective view of a first connecting member according to an embodiment of the present utility model;
fig. 6 is a perspective view of a second connecting member according to an embodiment of the present utility model.
Reference numerals: 100-screw rod; 200-a nut assembly; 210-nut; 211-a connection; 220-a nut connecting seat; 221-horizontal top surface; 222-mounting groove; 300-a first connection member; 310-vertical shaft connection; 311-vertical mounting holes; 312-a first elastic deformation avoidance gap; 320-cross axis connection; 321-U-shaped clearance part; 400-a second connection member; 410-an inverted U-shaped clearance portion; 420-horizontal mounting holes; 430-a second elastic deformation avoidance gap; 500-vertical shafts; 600-horizontal axis; 700-a first linear bearing; 800-second linear bearing.
Description of the embodiments
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1 to 6, the ball screw drive connection device of the present embodiment includes a screw 100, a nut assembly 200, a connection assembly, a vertical shaft 500, and a horizontal shaft 600.
The screw 100 is an existing ball screw, one end of the screw is connected to a fixing component through a bearing, the other end of the screw is connected to an output end of a driving component (such as a motor), and the screw is driven by the driving component to rotate, and in this embodiment, the screw 100 is horizontally arranged for illustration.
The screw assembly 200 is in transmission connection with the screw 100, and the screw assembly 200 is driven to move axially along the screw 100 when the screw 100 rotates, i.e. the screw assembly 200 can move horizontally along the screw 100.
The connection assembly includes a first connection part 300 for driving the connection screw assembly 200 and a second connection part 400 for driving the connection of the moving part driven by the screw. The first connecting member 300 is mounted with a first linear bearing 700 vertically disposed, and the second connecting member 400 is mounted with a second linear bearing 800 horizontally disposed.
The vertical shaft 500 is vertically arranged, the vertical shaft 500 is fixedly connected to the screw nut assembly 200 through a plurality of screws distributed in the circumferential direction, and the vertical shaft 500 is inserted into the first linear bearing 700 and is in sliding fit with the first linear bearing 700, so that the transmission connection between the first connecting component 300 and the screw nut assembly 200 is realized.
The cross shaft 600 is horizontally arranged, the axis of the cross shaft 600 is perpendicular to the axis of the screw rod 100, the cross shaft 600 is located above the screw rod 100, the cross shaft 600 is fixedly connected to the first connecting component 300 through a plurality of circumferentially distributed screws, and the cross shaft 600 is inserted into the second linear bearing 800 and is in sliding fit with the second linear bearing 800, so that the transmission connection of the first connecting component 300 and the second connecting component 400 is realized.
According to the ball screw transmission connecting device, when the ball screw transmission connecting device is used for transmitting and connecting a moving part, the moving part is connected with the nut assembly 200 through the first linear bearing 700 and the second linear bearing 800 which are horizontally arranged and vertically arranged, so that the moving part can freely slide in the vertical and horizontal directions relative to the screw 100, flexible transmission connection of the moving part and the screw 100 is realized, adverse effects of deflection deformation or radial swing of the screw 100 on the moving part can be weakened or even offset, deformation of the moving part is effectively prevented, the movement of the moving part is prevented from generating 'a powerful' and stability of the transmission process of the screw 100 and the movement stability of the moving part are guaranteed, and the measuring accuracy of a measuring machine can be improved.
Further, as shown in fig. 3 to 5, the first coupling member 300 includes a vertical shaft coupling portion 310 and a horizontal shaft coupling portion 320, the horizontal shaft coupling portion 320 is positioned above the vertical shaft coupling portion 310, the first linear bearing 700 is mounted on the vertical shaft coupling portion 310, and the horizontal shaft 600 is fixedly coupled to the horizontal shaft coupling portion 320.
The U-shaped clearance portion 321 is formed on the transverse shaft connecting portion 320, the inverted U-shaped clearance portion 410 is formed on the second connecting member 400, the opening directions of the inverted U-shaped clearance portion 410 and the U-shaped clearance portion 321 are opposite, the inverted U-shaped clearance portion 410 and the U-shaped clearance portion 321 are arranged in a crossing mode, so that the second connecting member 400 is arranged on the first connecting member 300 in a straddling mode, the vertical shaft connecting portion 310 and the first linear bearing 700 are located in the inverted U-shaped clearance portion 410, and the second linear bearing 800 is located in the U-shaped clearance portion 321, and therefore the assembly structure of the connecting assembly, the vertical shaft 500 and the transverse shaft 600 is compact, the whole ball screw transmission connecting device is compact in structure and convenient to install.
For the installation of the first linear bearing 700 on the first connecting member 300, specifically, as shown in fig. 5, a vertical installation hole 311 and a first elastic deformation avoidance gap 312 communicating with the vertical installation hole 311 are formed on the vertical shaft connection portion 310, the first elastic deformation avoidance gap 312 penetrates through the vertical shaft connection portion 310, the first linear bearing 700 is installed in the vertical installation hole 311, and fastened by a first fastener through the first elastic deformation avoidance gap 312. The first elastic deformation avoidance gap 312 can provide avoidance space for elastic deformation of the vertical shaft connecting portion 310, so that the first linear bearing 700 is convenient to insert and install into the vertical mounting hole 311, and after the first linear bearing 700 is inserted and installed in place, the first linear bearing 700 passes through the first elastic deformation avoidance gap 312 to be fastened through a first fastener such as a screw, so that pretightening force is provided for the first linear bearing 700, and stable and reliable installation in the vertical mounting hole 311 is ensured.
Similarly, as shown in fig. 6, the second connecting member 400 is formed with a horizontal mounting hole 420 and a second elastic deformation avoidance gap 430 communicating with the horizontal mounting hole 420, the second elastic deformation avoidance gap 430 penetrates through the second connecting member 400, and the second linear bearing 800 is mounted in the horizontal mounting hole 420 and fastened by a second fastening member penetrating through the second elastic deformation avoidance gap 430. The second elastic deformation avoidance gap 430 can provide avoidance space for elastic deformation of the second connecting component 400, so that the second linear bearing 800 is convenient to insert and install into the horizontal mounting hole 420, and after the second linear bearing 800 is inserted and installed in place, the second linear bearing 800 passes through the second elastic deformation avoidance gap 430 to be fastened through a second fastener such as a screw, so as to provide pretightening force for the second linear bearing 800, and ensure that the second linear bearing 800 is stably and reliably installed in the horizontal mounting hole 420.
The nut assembly 200 specifically includes a nut 210 and a nut connecting seat 220, the nut 210 is in driving engagement with the screw 100, the nut connecting seat 220 is fixedly connected with the nut 210 into a whole, the nut connecting seat 220 has a horizontal top surface 221, the bottom end of the vertical shaft 500 is fixedly connected to the horizontal top surface 221 of the nut connecting seat 220, and specifically fixedly connected to the central position of the horizontal top surface 221, so that the nut connecting seat 220 is stressed as uniformly as possible. By arranging the screw connecting seat 220, the upright post and the screw assembly 200 can be conveniently and fixedly connected, the structure of the screw 210 is not required to be changed, and the stability and reliability of screw and screw transmission are not affected.
Further, the nut connecting seat 220 has a mounting groove 222 with an arc-shaped cross section, the mounting groove 222 penetrates through the nut connecting seat 220 along the axial direction of the nut 210, and the nut 210 is located in the mounting groove 222 and is coaxially arranged with the mounting groove 222. Preferably, the nut connecting seat 220 is in an axisymmetric structure and straddles the nut 210 and is fixedly connected with the nut 210, so that the nut 210 can be ensured to be stressed uniformly, and the nut assembly 200 operates stably and reliably.
Specifically, a connection portion 211 is formed at one end of the nut 210, and the connection portion 211 is screw-fastened to a corresponding end surface of the nut connection seat 220. Taking the perspective view shown in fig. 1 and 2 as an example, the connection portion 211 is located on the right end of the nut 210, and the connection portion 211 is fastened and connected to the right end surface of the nut connection seat 220 by a plurality of screws circumferentially arranged.
The embodiment also provides a measuring machine, in particular a three-coordinate measuring machine, which comprises a moving component and a ball screw transmission connecting device, wherein the ball screw transmission connecting device is in transmission connection with the moving component to drive the moving component to move along the axial direction of the screw 100, the specific structure of the ball screw transmission connecting device is described in the specific embodiment of the ball screw transmission connecting device and the description of fig. 1 to 6, and the measuring machine adopting the ball screw transmission connecting device has good stability and high measuring precision.
The moving component may be a component of the measuring machine that needs to perform linear motion, such as an X-direction moving component, for example, a carriage, or a Y-direction moving component, which is not described herein.
Specifically, the moving member is fixedly connected to the second connecting member 400 of the moving assembly, and for example, the four corners of the bottom end of the second connecting member 400 are fastened to the carriage by screws.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A ball screw drive connection comprising:
a screw rod horizontally arranged;
the screw assembly is in transmission connection with the screw rod, and the screw rod drives the screw assembly to axially move along the screw rod when rotating;
the connecting assembly comprises a first connecting part and a second connecting part, wherein a first linear bearing which is vertically arranged is arranged on the first connecting part, and a second linear bearing which is horizontally arranged is arranged on the second connecting part;
the vertical shaft is vertically arranged and fixedly connected to the nut assembly, and the vertical shaft is in sliding fit with the first linear bearing;
the horizontal shaft is horizontally arranged, the axis of the horizontal shaft is perpendicular to the axis of the screw rod, and the horizontal shaft is fixedly connected to the first connecting component and is in sliding fit with the second linear bearing.
2. The ball screw drive connection according to claim 1, wherein,
the first connecting component comprises a vertical shaft connecting part and a transverse shaft connecting part, the transverse shaft connecting part is positioned above the vertical shaft connecting part, the first linear bearing is arranged on the vertical shaft connecting part, and the transverse shaft is fixedly connected with the transverse shaft connecting part.
3. The ball screw drive connection according to claim 2, wherein,
the U-shaped clearance part is formed on the transverse shaft connecting part, the inverted U-shaped clearance part is formed on the second connecting part, the inverted U-shaped clearance part is intersected with the U-shaped clearance part, so that the second connecting part is spanned on the first connecting part, the vertical shaft connecting part and the first linear bearing are located in the inverted U-shaped clearance part, and the second linear bearing is located in the U-shaped clearance part.
4. The ball screw drive connection according to claim 2, wherein,
the vertical shaft connecting portion is provided with a vertical mounting hole and a first elastic deformation avoidance gap communicated with the vertical mounting hole, the first elastic deformation avoidance gap penetrates through the vertical shaft connecting portion, the first linear bearing is mounted in the vertical mounting hole, and the first linear bearing penetrates through the first elastic deformation avoidance gap to be fastened.
5. The ball screw drive connection according to claim 3, wherein,
the second connecting part is provided with a horizontal mounting hole and a second elastic deformation avoidance gap communicated with the horizontal mounting hole, the second elastic deformation avoidance gap penetrates through the second connecting part, and the second linear bearing is installed in the horizontal mounting hole and penetrates through the second elastic deformation avoidance gap to be fastened through a second fastening piece.
6. The ball screw drive connection according to claim 1, wherein,
the nut assembly comprises a nut and a nut connecting seat, the nut is matched with the screw rod in a transmission mode, the nut connecting seat is fixedly connected with the nut into a whole, the nut connecting seat is provided with a horizontal top surface, and the bottom end of the vertical shaft is fixedly connected to the horizontal top surface of the nut connecting seat.
7. The ball screw drive connection of claim 6, wherein,
the nut connecting seat is provided with a mounting groove with an arc-shaped cross section, the mounting groove penetrates through the nut connecting seat along the axial direction of the nut, and the nut is positioned in the mounting groove and is coaxially arranged with the mounting groove.
8. The ball screw drive connection of claim 7, wherein,
one end of the nut is provided with a connecting part, and the connecting part is fixedly connected with the corresponding end face screw of the nut connecting seat.
9. A measuring machine comprising a moving part and a ball screw drive connection device in drive connection with the moving part for driving the moving part to move, characterized in that,
the ball screw drive connection is the ball screw drive connection of any one of claims 1-8.
10. The measuring machine according to claim 9, wherein the measuring machine is configured to,
the moving part is a carriage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320080721.2U CN219692671U (en) | 2023-01-12 | 2023-01-12 | Ball screw transmission connecting device and measuring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320080721.2U CN219692671U (en) | 2023-01-12 | 2023-01-12 | Ball screw transmission connecting device and measuring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219692671U true CN219692671U (en) | 2023-09-15 |
Family
ID=87965423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320080721.2U Active CN219692671U (en) | 2023-01-12 | 2023-01-12 | Ball screw transmission connecting device and measuring machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219692671U (en) |
-
2023
- 2023-01-12 CN CN202320080721.2U patent/CN219692671U/en active Active
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