CN112729062A - Ball screw axial clearance measuring device - Google Patents
Ball screw axial clearance measuring device Download PDFInfo
- Publication number
- CN112729062A CN112729062A CN202011626998.8A CN202011626998A CN112729062A CN 112729062 A CN112729062 A CN 112729062A CN 202011626998 A CN202011626998 A CN 202011626998A CN 112729062 A CN112729062 A CN 112729062A
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- loading
- screw
- driving
- moving platform
- base
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a ball screw axial clearance measuring device, which comprises a rack, a support and a moving platform, wherein a base of the rack is fixedly arranged on the support, a guide rod is fixedly arranged on the rack, the moving platform is sleeved on the guide rod and moves up and down along the guide rod, a moving platform driving mechanism is arranged on the rack, a screw rod clamping mechanism is arranged between the moving platform and the base of the rack, the moving platform driving mechanism and the screw rod clamping mechanism work together to fix a screw rod, a first driving mechanism for driving a nut to slightly move downwards is arranged on the moving platform, a second driving mechanism for driving the nut to slightly move upwards is arranged on the base, and a measuring mechanism for detecting the axial clearance between the nut and the screw rod is arranged on the second driving mechanism; the advantages are that the installation and the operation are convenient, and the applicable model is wide; the model is replaced only by replacing the corresponding upper and lower loading tools, so that the repeated precision is high, the detection efficiency is high, and the method is suitable for batch production lines.
Description
Technical Field
The invention relates to the field of ball screw measuring devices, in particular to a ball screw axial clearance measuring device.
Background
The ball screw is a component for converting rotary motion into linear motion or converting linear motion into rotary motion, is widely applied to the fields of equipment, engineering, automobiles, aerospace and the like, has the characteristics of high precision, reversibility and high efficiency, and has very small frictional resistance. The axial play of the ball screw generally refers to an axial displacement of the nut relative to the screw when the nut is subjected to an axial force while the rotation of the nut is restricted by keeping the screw stationary.
Ball screw is in the processing production process, because multiple reason, steel ball specification selection mistake when installing, lead screw and screw existence error, the pretightning force is unreasonable etc. can cause ball screw's clearance abnormal conditions to appear, and then lead to ball screw uncontrollable damage to appear in the use, and ball screw is through long-time use, the wearing and tearing will take place for the lead screw, just so take place very big influence to the accuracy that uses ball screw, the relative rotation that can't restrict lead screw or screw that current axial play measuring device has some makes measuring error great, some measuring device structures are comparatively complicated, inconvenient operation, some measuring device detection efficiency is lower, and can't be applicable to the axial play measurement of the ball screw of different models.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides an axial play measuring device for a ball screw, which limits the relative rotation of the screw by a screw clamping mechanism, reduces the axial play measuring error of the ball screw, and has the advantages of simple structure, convenient installation and operation, and effectively improved detection efficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a ball screw axial internal clearance measuring device, includes frame and moving platform, moving platform with sliding fit about the frame, be provided with moving platform actuating mechanism in the frame, moving platform with be provided with lead screw fixture between the base of frame, moving platform actuating mechanism with lead screw fixture coacts for the solid lead screw, be provided with the first actuating mechanism who is used for driving the screw to remove a little downwards on the moving platform, be provided with the second actuating mechanism who is used for driving the screw to remove a little upwards on the base, be provided with the measuring mechanism who is used for detecting the axial internal clearance between screw and the lead screw on the second actuating mechanism.
Preferably, the screw rod clamping mechanism comprises a first taper tip and a second taper tip, the first taper tip is fixed at the lower end of the movable platform, an arc-shaped groove used for being matched with a ball head at one end of the screw rod is formed in the top of the first taper tip, the second taper tip is fixed at the upper end of the base, the top of the second taper tip is matched with a tip hole at the other end of the screw rod, the movable platform driving mechanism drives the movable platform to move downwards, and the first taper tip and the second taper tip are respectively matched with two ends of the screw rod to be in a fixed state.
Preferably, the moving platform driving mechanism comprises a loading cylinder and a connecting seat, the loading cylinder is fixedly arranged on the rack, a piston rod of the loading cylinder is fixedly connected with the connecting seat, and the connecting seat is fixedly connected with the moving platform.
Preferably, the first driving mechanism includes a driving cylinder, a first driving sleeve and a first loading head for abutting against a nut, the driving cylinder is fixed on the connecting seat, a piston rod of the driving cylinder is fixedly connected with the first driving sleeve, the first driving sleeve downwardly penetrates through the moving platform and is in up-and-down sliding fit with the moving platform, the first taper tip is located in the first driving sleeve, and the first loading head is fixed on the first driving sleeve.
Preferably, the second driving mechanism includes a loading block, a first loading rod, a second driving sleeve and a second loading head for abutting against the nut, the first loading rod is hinged to the lower end of the base, one end of the first loading rod is fixed to the loading block, the other end of the first loading rod abuts against the measuring mechanism, the second driving sleeve penetrates the base upwards and is in sliding fit with the base up and down, the second taper tip is located in the second driving sleeve, the second loading head is fixed to the second driving sleeve, and the loading block pushes the nut to move slightly upwards under the action of the lever force exerted by the first loading rod.
Preferably, the measuring mechanism comprises a dial indicator and a second loading rod, the second loading rod is hinged to the lower end of the base, the lower surface of one end of the second loading rod is abutted to the end portion of the first loading rod, the upper surface of one end of the second loading rod is abutted to the second driving sleeve, and the dial indicator is fixedly connected to the other end of the second loading rod.
Preferably, the base of the frame is fixedly mounted on the bracket.
Preferably, a guide rod is fixedly arranged on the rack, and the moving platform is sleeved on the guide rod and moves up and down along the guide rod.
Compared with the prior art, the measuring device has the advantages of simple structure, convenience in installation and operation, wide applicable models, high repetition precision, high detection efficiency and suitability for batch production lines, and the models can be changed only by replacing the corresponding first loading head and the second loading head.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a view of the lower end of the base of the present invention;
FIG. 4 is a partial cross-sectional view of the present invention;
fig. 5 is a partial exploded view of the present invention.
The device comprises a machine frame 1, a moving platform 2, a first taper tip 3, a second taper tip 4, a loading cylinder 5, a connecting seat 6, a driving cylinder 7, a first driving sleeve 8, a first loading head 9, a loading block 10, a screw rod 11, a first loading rod 12, a second driving sleeve 13, a second loading head 14, a dial indicator 15, a second loading rod 16, a base 17 and a screw nut 18.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1-5, an axial clearance measuring device for a ball screw comprises a frame 1 and a moving platform 2, wherein the moving platform 2 is in up-and-down sliding fit with the frame 1, a base 17 is fixedly arranged on the frame 1, a loading cylinder 5 is fixedly arranged on the frame 1, a piston rod of the loading cylinder 5 is fixedly connected with a connecting seat 6, and the connecting seat 6 is fixedly connected with the moving platform 2. The first taper tip 3 is fixed at the lower end of the movable platform 2, an arc-shaped groove used for being matched with a ball head at one end of the screw rod 11 is formed in the top of the first taper tip 3, the second taper tip 4 is fixed at the upper end of the base 17, the top of the second taper tip 4 is matched with a tip hole at the other end of the screw rod 11, and the loading cylinder 5 drives the movable platform 2 to move downwards, so that the first taper tip 3 and the second taper tip 4 are respectively matched with two ends of the screw rod 11 to enable the first taper tip 3 and the second taper tip 4 to be. The driving cylinder 7 is fixed on the connecting seat 6, a piston rod of the driving cylinder 7 is fixedly connected with a first driving sleeve 8, the first driving sleeve 8 downwards penetrates through the moving platform 2 and is in up-and-down sliding fit with the moving platform 2, the first taper tip 3 is positioned in the first driving sleeve 8, the first loading head 9 is fixed on the first driving sleeve 8, the first loading rod 12 is hinged with the lower end of the base 17, one end of the first loading rod 12 is fixed with the loading block 10, the other end of the first loading rod 12 is abutted with the lower surface of one end of the second loading rod 16, the second driving sleeve 13 upwards penetrates through the base 17 and is in up-and-down sliding fit with the base 17, the second taper tip 4 is positioned in the second driving sleeve 13, the second loading head 14 is fixed with the second driving sleeve 13, the loading block 10 pushes the screw 18 to move upwards slightly under the action of the lever force exerted by the first loading rod 12, and the second loading rod 16 is hinged with the lower end of the base 17, the lower surface of one end of the second loading rod 16 abuts against the end of the first loading rod 12, the upper surface of one end of the second loading rod 16 abuts against the second driving sleeve 13, and the dial indicator 15 is fixedly connected with the other end of the second loading rod 16.
The working process of the axial clearance measuring device comprises the following steps: taking a ball screw to be tested, matching a tip hole at the lower end of a screw rod 11 with a second taper tip 4, controlling a loading cylinder 5 to drive a moving platform 2 to move downwards until a first taper tip 3 abuts against a ball head of the screw rod 11, so that the screw rod 11 is in a fixed state, applying a lever force to a second driving sleeve 13 by a loading block 10 through a first loading rod 12, then downwards rotating a screw nut 18 to abut against a second loading head 14, then continuously rotating the screw nut 18, pushing the second driving sleeve 13 to move downwards until the sensing stress is obviously increased in the rotating process, stopping rotating, simultaneously keeping the second driving sleeve 13 out of contact with the lower end face of a base 17, ensuring that all the lever forces applied by the loading block 10 act on the bottom of the screw nut 18, then resetting the gauge head of a dial gauge 15, pushing a piston rod of a driving cylinder 7 to push a first driving sleeve 8 to move downwards to abut against the upper end of the screw nut 18, and then, continuously driving the first loading head 9 to move downwards and applying an acting force to the top of the screw nut 18, driving the screw nut 18 to move downwards to a limit position, wherein the reading shown by the dial indicator 15 is the axial movement amount of the screw nut 18 to be measured, namely the axial clearance of the ball screw, and finally, unloading the driving cylinder 7, then unloading the loading cylinder 5, taking down the measured product, and completing the measurement of the axial clearance of the ball screw.
The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.
Claims (8)
1. The utility model provides a ball screw axial internal clearance measuring device, its characterized in that includes frame and moving platform, moving platform with sliding fit about the frame, be provided with moving platform actuating mechanism in the frame, moving platform with be provided with lead screw fixture between the base of frame, moving platform actuating mechanism with lead screw fixture coacts and is used for fixed screw, be provided with the first actuating mechanism who is used for driving the screw and slightly removes downwards on the moving platform, be provided with the second actuating mechanism who is used for driving the screw and slightly removes upwards on the base, be provided with the measuring mechanism who is used for detecting the axial internal clearance between screw and the lead screw on the second actuating mechanism.
2. The ball screw axial play measuring device according to claim 1, wherein the screw clamping mechanism includes a first taper tip and a second taper tip, the first taper tip is fixed at the lower end of the movable platform, an arc-shaped groove for matching with a ball head at one end of the screw is formed in the top of the first taper tip, the second taper tip is fixed at the upper end of the base, the top of the second taper tip is matched with a tip hole at the other end of the screw, and the movable platform driving mechanism drives the movable platform to move downward, so that the first taper tip and the second taper tip are respectively matched with two ends of the screw to be in a fixed state.
3. The device for measuring axial play of a ball screw as claimed in claim 2, wherein the moving platform driving mechanism includes a loading cylinder and a connecting seat, the loading cylinder is fixedly disposed on the frame, a piston rod of the loading cylinder is fixedly connected to the connecting seat, and the connecting seat is fixedly connected to the moving platform.
4. The device for measuring the axial play of the ball screw according to claim 3, wherein the first driving mechanism includes a driving cylinder, a first driving sleeve and a first loading head for abutting against the nut, the driving cylinder is fixed on the connecting seat, a piston rod of the driving cylinder is fixedly connected with the first driving sleeve, the first driving sleeve passes downward through the movable platform and is in up-and-down sliding fit with the movable platform, the first taper tip is located in the first driving sleeve, and the first loading head is fixed on the first driving sleeve.
5. The ball screw axial play measuring device according to claim 3, wherein the second driving mechanism includes a loading block, a first loading rod, a second driving sleeve and a second loading head for abutting against the nut, the first loading rod is hinged to the lower end of the base, one end of the first loading rod is fixed to the loading block, the other end of the first loading rod abuts against the measuring mechanism, the second driving sleeve passes upward through the base and is in up-and-down sliding fit with the base, the second taper point is located in the second driving sleeve, the second loading head is fixed to the second driving sleeve, and the loading block pushes the nut to move slightly upward under the action of the lever force exerted by the first loading rod.
6. The device for measuring the axial play of the ball screw according to claim 5, wherein the measuring mechanism includes a dial indicator and a second loading rod, the second loading rod is hinged to the lower end of the base, the lower surface of one end of the second loading rod abuts against the end of the first loading rod, the upper surface of one end of the second loading rod abuts against the second driving sleeve, and the dial indicator is fixedly connected to the other end of the second loading rod.
7. The ball screw axial play measuring device according to claim 1, wherein a base of the housing is fixedly mounted on the bracket.
8. The ball screw axial play measuring device according to claim 1, wherein a guide bar is fixedly disposed on the frame, and the moving platform is sleeved on the guide bar and moves up and down along the guide bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626998.8A CN112729062A (en) | 2020-12-30 | 2020-12-30 | Ball screw axial clearance measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626998.8A CN112729062A (en) | 2020-12-30 | 2020-12-30 | Ball screw axial clearance measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112729062A true CN112729062A (en) | 2021-04-30 |
Family
ID=75608072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011626998.8A Pending CN112729062A (en) | 2020-12-30 | 2020-12-30 | Ball screw axial clearance measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112729062A (en) |
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2020
- 2020-12-30 CN CN202011626998.8A patent/CN112729062A/en active Pending
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