CN214407400U

CN214407400U - Detection device for lead screw nut

Info

Publication number: CN214407400U
Application number: CN202120536393.3U
Authority: CN
Inventors: 韩志强; 邓传根; 柯巍巍
Original assignee: Nanjing Marposs Automation Equipment Co ltd
Current assignee: Nanjing Marposs Automation Equipment Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-10-15
Anticipated expiration: 2031-03-15

Abstract

The utility model discloses a detection device for a screw nut, which comprises three groups of detection components, wherein each detection component comprises a bracket, a measuring contact, an elastic sheet, a lifting cylinder and a detection sensor; the measuring contact is arranged on the elastic sheet, the elastic sheet is connected to the lifting cylinder, the measuring contact is connected with the lifting cylinder through the elastic sheet, and the lifting cylinder drives the measuring contact to move up and down; the detection sensor is connected with the measuring contact. In this way, the utility model discloses a three measuring component of group measure lead screw nut simultaneously, and in the measurement process, lead screw nut need not rotatoryly, changes into static measurement by traditional dynamic measurement, only measures the contact in the measuring twinkling of an eye and the contact of the interior arc channel of lead screw nut, reduces measuring part and the too much contact of lead screw nut and collision, has avoided dynamic measurement to the damage on arc surface in the lead screw nut to effectively reduced the damage of measuring the contact.

Description

Detection device for lead screw nut

Technical Field

The utility model relates to an internal thread channel detection area, concretely relates to a detection device for screw nut.

Background

At present, the inner circular arc middle diameter M value of the screw nut is generally detected by adopting a single-point following motion measurement method, namely the screw nut rotates and is provided with a circular encoder to feed back a motion angle, a measuring ball is driven by the screw nut to move axially along the screw nut, the rear end of the measuring ball is provided with a displacement measuring sensor or a grating sensor to detect the distance from the measuring ball to the axis of the screw nut, and the measured value and a sampling value of the circular encoder are subjected to data processing together to obtain the M value of the screw nut.

The traditional screw nut inner arc pitch diameter M value detection mechanism is characterized in that a measurement ball is driven by an inner arc surface to move along the axis direction of a screw nut due to the fact that the screw nut needs to rotate, the measurement ball moves in the inner arc surface of the whole screw nut and can be measured simultaneously, and if repeated measurement is conducted, a certain amount of abrasion can be caused on the inner arc surface of the screw nut.

Disclosure of Invention

For solving the not enough of prior art existence, the utility model provides a detection device for screw nut.

A detection device for a lead screw nut comprises three groups of detection assemblies, wherein each detection assembly comprises a support, a measuring contact, an elastic sheet, a lifting cylinder and a detection sensor; the measuring contact is arranged on the elastic sheet, the elastic sheet is connected to the lifting cylinder, the measuring contact is connected with the lifting cylinder through the elastic sheet, and the lifting cylinder drives the measuring contact to move up and down; the detection sensor is connected with the measuring contact.

Preferably, the detection assembly further comprises a protective sleeve, a through hole is formed in the protective sleeve, the elastic piece is located in the protective sleeve, and the measuring contact penetrates through the through hole in the protective sleeve.

Preferably, the device also comprises an alignment assembly, wherein the alignment assembly comprises fixed blocks, a connecting rod, a connecting block and an alignment spring, the fixed blocks are connected through the connecting rod, the connecting block and the alignment spring are sleeved on the connecting block, and the connecting block is arranged oppositely; the alignment spring is positioned between the connecting block and the fixed block, and the connecting block is connected with the fixed block through the alignment spring; the support is connected to the connecting block.

Preferably, the alignment assembly further comprises a sliding block and a linear guide rail, the bracket is arranged on the sliding block, the sliding block is connected with the linear guide rail in a sliding mode, and two ends of the sliding block are connected with the connecting block.

Preferably, the device further comprises a moving assembly, wherein the moving assembly comprises a sliding table and a moving cylinder; the support sets up on the slip table, the slip table is connected on the removal cylinder, the removal cylinder drive the slip table horizontal migration.

Preferably, the moving assembly further comprises a sliding rail, the sliding table is arranged on the sliding rail, and the sliding table is connected with the sliding rail in a sliding manner.

Preferably, the compensation device further comprises a compensation assembly, wherein the compensation assembly comprises a compensation reference block and a compensation sensor, the compensation sensor penetrates through the sliding table to be arranged on the fixed base, and the compensation sensor is arranged on the sliding table.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model has the following beneficial effect:

the utility model provides a detection apparatus for be used for screw nut measures screw nut simultaneously through three measuring assemblies of group, and in the measurement process, screw nut need not to rotate, changes into static measurement by traditional dynamic measurement, only measures the contact and the contact of arc channel in screw nut in the measuring twinkling of an eye, reduces measuring part and screw nut too much contact and collision, has avoided dynamic measurement to the damage on arc surface in the screw nut to the damage of measuring the contact has effectively been reduced.

Drawings

Fig. 1 is a schematic structural view of the detection device for the lead screw nut of the present invention.

Fig. 2 is a schematic structural diagram of a detection assembly in the detection apparatus for the lead screw nut of the present invention.

Fig. 3 is a schematic structural diagram of a moving assembly and an anti-collision assembly in the detection device for the lead screw nut of the present invention.

Fig. 4 is a schematic structural diagram of a compensating assembly in a detecting device for a lead screw nut according to the present invention.

Fig. 5 is a schematic structural view of an alignment assembly in the detection apparatus for lead screw nut of the present invention.

Description of reference numerals:

1. a detection component; 11. a support; 12. a measuring probe; 13. a lifting cylinder; 14. a detection sensor; 15. a spring plate; 16. a protective sleeve;

2. a moving assembly; 21. a sliding table; 22. a moving cylinder; 23. a slide rail;

3. a compensation component; 31. a compensation reference block; 32. a compensation sensor;

4. an anti-collision assembly; 41. a support block; 42. a support bar; 43. an anti-collision spring; 44. an anti-collision block;

5. an alignment assembly; 51. a fixed block; 52. a connecting rod; 53. connecting blocks; 54. aligning the spring; 55. a slider; 56. a linear guide rail.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to the drawings, a detection device for a lead screw nut comprises three groups of detection assemblies 1. The detection assembly 1 comprises a bracket 11, a measuring contact 12, a lifting cylinder 13 and a detection sensor 14. The three measuring probes 12 are arranged in a triangular shape, and the inner circular arc pitch diameter M of the workpiece is calculated through the vertical direction measured by the three measuring probes 12. The three measuring contacts 12 are respectively connected to three lifting cylinders 13, and the lifting cylinders 13 drive the measuring contacts 12 to move up and down. The detection sensor 14 is electrically connected with the measuring contact 12, and the detection sensor 14 can be a pen-type sensor.

In the measuring process, the measuring contact 12 is in contact with the inner arc surface of the workpiece, and the diameter of a circle surrounded by the three measuring contacts 12 is changed by driving the measuring contact 12 to move through the lifting cylinder 13, so that the detection device can be suitable for workpieces with different diameters, and the application range of the detection device is expanded.

The detection assembly 1 further comprises an elastic sheet 15, the measuring contact 12 is arranged on the elastic sheet 15, the elastic sheet 15 is connected to the lifting cylinder 13, and the measuring contact 12 is connected with the lifting cylinder 13 through the elastic sheet 15. The elastic sheet 15 may be provided in a sheet shape so as to have certain elasticity.

In order to effectively avoid damaging the measuring contact 12, the detecting assembly 1 further comprises a protective sleeve 16, a through hole is formed in the protective sleeve 16, the elastic sheet 15 is located in the protective sleeve 16, and the measuring contact 12 penetrates through the through hole in the protective sleeve 16. When the measuring probe 12 is to be inserted into the inner hole of the workpiece, the protective sleeve 16 plays a certain guiding role, at this time, the three measuring probes 12 move into the protective sleeve 16 under the action of the lifting cylinder 13, that is, the three measuring probes 12 retract into the protective sleeve 16, and during the insertion process, the measuring probes 12 do not contact the workpiece. After the measuring contact 12 enters the position to be measured in the workpiece, the measuring contact 12 expands outwards under the elastic action of the elastic sheet 15 and extends out of the through hole of the protective sleeve 16, so that the measuring contact 12 can be abutted against the workpiece.

The detection device further comprises a moving assembly 2, wherein the moving assembly 2 comprises a sliding table 21 and a moving cylinder 22. The bracket 11 is provided on a slide table 21, and the slide table 21 is connected to a moving cylinder 22. The moving cylinder 22 drives the sliding table 21 to move horizontally, and the whole detection assembly 1 is driven to move horizontally through the sliding table 21, so that the movement of the measuring contact 12 in the inner hole of the workpiece is only required to be met, and the movement of a large stroke along the axis direction is not required. The moving assembly 2 further comprises a sliding rail 23, the sliding table 21 is arranged on the sliding rail 23, and the sliding table 21 is connected with the sliding rail 23 in a sliding manner. The moving cylinder 22 drives the sliding table 21 to move horizontally on the slide rail 23, and the moving smoothness of the sliding table 21 is improved.

Since the sliding table 21 may have a position offset, in order to avoid the position offset from affecting the detection result, the detection device further includes a compensation assembly 3. The compensation assembly 3 comprises a compensation reference block 31 and a compensation sensor 32, the compensation sensor 32 penetrates through the sliding table 21 and is arranged on a fixed seat, the fixed seat is arranged below the sliding table 21, and the fixed seat cannot move along with the sliding table 21. The compensation sensor 32 is provided on the slide table 21, and the compensation sensor 32 is moved in accordance with the movement of the slide table 21. That is, the compensation reference block 31 is always stationary, and the compensation sensor 32 measures the distance to the compensation reference block 31 as one reference surface, and this distance needs to be taken into consideration when calculating the detection data, thereby avoiding the influence of this distance on the detection result and improving the detection accuracy. In order to compensate for the error caused by the position deviation of the sliding table 21, external measurement is introduced, the variation of the sliding table 21 is displayed, and the final detection value is corrected to eliminate the error in direct measurement so as to achieve the purpose of accurate measurement.

In order to prevent the driving force of the moving cylinder 22 directly driving the sliding table 21 from being too large, so that the detection assembly 1 collides with the workpiece, the detection device further comprises a collision avoidance assembly 4. The anti-collision assembly 4 comprises a supporting block 41, a supporting rod 42 and an anti-collision spring 43, wherein the supporting block 41 is arranged on the sliding table 21, the supporting block 41 is connected with the movable cylinder 22 through the supporting rod 42, and the anti-collision spring 43 is sleeved on the supporting rod 42. The moving cylinder 22 drives the anti-collision spring 43, the supporting block 41 drives the sliding table 21 to move horizontally, and the restoring force of the anti-collision spring 43 can offset part of the driving force of the moving cylinder 22, so that the anti-collision effect can be achieved.

The anti-collision assembly 4 further comprises an anti-collision block 44, the anti-collision block 44 is sleeved on the support rod 42, the anti-collision spring 43 is located between the anti-collision block 44 and the support block 41, one end of the anti-collision spring 43 is connected with the anti-collision block 44, and the other end of the anti-collision spring 43 is connected with the support block 41. Through the setting of anticollision piece 44, be convenient for anticollision spring 43 and the being connected of moving cylinder 22, moving cylinder 22 passes through anticollision piece 44 anticollision spring 43 for anticollision spring 43 is in pressurized state, thereby is favorable to moving cylinder 22 and can drive slip table 21 horizontal migration better.

The detection device further comprises an alignment assembly 5, and after the measuring contact 12 enters the position to be measured in the workpiece, the alignment assembly drives the measuring contact 12 to move horizontally to perform position fine adjustment, so that the measuring contact 12 is effectively guaranteed to be just in the correct position, and the detection accuracy is improved. The alignment assembly 5 comprises fixing blocks 51, a connecting rod 52, a connecting block 53 and an alignment spring 54, wherein the fixing blocks 51 are arranged on the sliding table 21, and the fixing blocks 51 are connected through the connecting rod 52. The connecting block 53 and the aligning spring 54 are sleeved on the connecting block 53. The aligning spring 54 is located between the connecting block 53 and the fixing block 51, and the connecting block 53 is connected to the fixing block 51 through the aligning spring 54.

Connecting block 53 sets up relatively, and support 11 is connected on connecting block 53, is provided with the lug on the support 11, and support 11 passes through the lug to be connected with connecting block 53, and support 11 is located between connecting block 53. That is, springs are provided at both ends of the bracket 11 through the connection blocks 53, and the position of the bracket 11 is finely adjusted by the elasticity of the springs at both sides, thereby adjusting the position of the measuring tip 12 connected to the corresponding bracket 11.

In order to facilitate the movement of the bracket 11 between the springs on both sides, the alignment assembly 5 further comprises a sliding block 55 and a linear guide rail 56, the bracket 11 is arranged on the sliding block 55, the sliding block 55 is slidably connected with the linear guide rail 56, and both ends of the sliding block 55 are connected with the connecting blocks 53. The arrangement of the sliding block 55 and the linear guide rail 56 reduces the friction force when the bracket 11 moves, which is beneficial to enabling the bracket 11 to move more smoothly.

In the actual use process, before the detection device is used, all parts need to be subjected to zero calibration of the standard measuring tool, the zero offset between the parts and the detection device is judged to be qualified when the workpieces are measured, and then whether the measurement precision can meet the use requirement or not is seen from the use result.

Before entering a workpiece to be measured, the lifting cylinder 13 drives the measuring contact 12 to move, the measuring contact 12 is locked in the protective sleeve 16, and the measuring contact 12 is prevented from contacting the workpiece in the process of entering the workpiece to damage the workpiece and the measuring contact 12. After the stylus 12 to be measured enters the designated position of the workpiece, the stylus 12 is brought into contact with the workpiece through the aperture of the protective sleeve 16. If the measuring contact 12 is not completely matched with the workpiece, a lateral force is generated between the contacted part and the measuring contact 12, the bracket 11 is driven to slightly move between the two aligning springs 54 of the aligning assembly 5 through the sliding block 55, and a slight reverse force is generated, so that the measuring contact 12 is completely clamped into the inner arc channel of the workpiece, the measuring contact 12 is perfectly contacted with the workpiece, errors are eliminated, and the measuring accuracy is ensured. After the stylus 12 to be measured is in place, the final measurement is displayed by the change of the detection sensor 14 mounted on the carriage 11.

The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. The detection device for the lead screw nut is characterized by comprising three groups of detection assemblies, wherein each detection assembly comprises a support, a measuring contact, an elastic sheet, a lifting cylinder and a detection sensor; the measuring contact is arranged on the elastic sheet, the elastic sheet is connected to the lifting cylinder, the measuring contact is connected with the lifting cylinder through the elastic sheet, and the lifting cylinder drives the measuring contact to move up and down; the detection sensor is connected with the measuring contact.

2. A detection device for a lead screw nut as claimed in claim 1, characterized in that: the detection assembly further comprises a protective sleeve, a through hole is formed in the protective sleeve, the elastic sheet is located in the protective sleeve, and the measuring contact penetrates through the through hole in the protective sleeve.

3. A detection device for a lead screw nut as claimed in claim 1, characterized in that: the alignment assembly comprises fixing blocks, connecting rods, connecting blocks and alignment springs, the fixing blocks are connected through the connecting rods, the connecting blocks and the alignment springs are sleeved on the connecting blocks, and the connecting blocks are arranged oppositely; the alignment spring is positioned between the connecting block and the fixed block, and the connecting block is connected with the fixed block through the alignment spring; the support is connected to the connecting block.

4. A detection device for a lead screw nut as claimed in claim 3, characterized in that: the alignment assembly comprises a sliding block and a linear guide rail, the support is arranged on the sliding block, the sliding block is connected with the linear guide rail in a sliding mode, and two ends of the sliding block are connected with the connecting block.

5. A detection device for a lead screw nut as claimed in claim 1, characterized in that: the device also comprises a moving assembly, and the moving assembly also comprises a sliding table and a moving cylinder; the support sets up on the slip table, the slip table is connected on the removal cylinder, the removal cylinder drive the slip table horizontal migration.

6. A detection device for a lead screw nut as claimed in claim 5, characterized in that: the moving assembly further comprises a sliding rail, the sliding table is arranged on the sliding rail, and the sliding table is connected with the sliding rail in a sliding mode.

7. A detection device for a lead screw nut as claimed in claim 5, characterized in that: still include compensation assembly, compensation assembly includes compensation reference block and compensation sensor, the compensation sensor passes the slip table sets up on the fixing base, the compensation sensor sets up on the slip table.