CN220850338U - Radial adjustable high-precision hardness tester spindle mechanism - Google Patents
Radial adjustable high-precision hardness tester spindle mechanism Download PDFInfo
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- CN220850338U CN220850338U CN202322784118.5U CN202322784118U CN220850338U CN 220850338 U CN220850338 U CN 220850338U CN 202322784118 U CN202322784118 U CN 202322784118U CN 220850338 U CN220850338 U CN 220850338U
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- deep groove
- groove ball
- main shaft
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- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 19
- 238000005096 rolling process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014392 establishment of spindle localization Effects 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a radial adjustable high-precision sclerometer spindle mechanism, which comprises a spindle, two sets of adjusting devices and a fixed beam, wherein the spindle is provided with a fixed beam; wherein, the two sets of adjusting devices are respectively fixed at the corresponding positions of the upper part and the lower part of the fixed beam, and the main shaft is contacted and penetrated into the corresponding central positions of three groups of small-clearance deep groove ball bearings in the upper and lower sets of adjusting devices; the small-clearance deep groove ball bearings are arranged at the eccentric position of the eccentric shaft and can synchronously rotate with the eccentric shaft, the excircles of one group of small-clearance deep groove ball bearings corresponding up and down in the two sets of adjusting devices are tangential to the single-side plane of the main shaft, and the excircles of the other two groups of small-clearance deep groove ball bearings corresponding up and down are tangential to the excircles of the main shaft. The utility model can realize micron-level high-precision clearance positioning between the main shaft and the small-clearance deep groove ball bearing, has small and constant rolling friction force, is easy to realize higher perpendicularity between the main shaft and the workpiece testing surface, ensures the stability of force during the main shaft test, and is easy to maintain and replace and convenient to adjust.
Description
Technical Field
The utility model relates to the technical field of durometers, in particular to a radially adjustable high-precision durometers spindle mechanism.
Background
When the hardness tester works, a stable test force is exerted on the main shaft, so that the test force of the main shaft is vertically acted on the surface of the part to generate an indentation, and the hardness value of the surface of the part is obtained through indentation measurement and calculation.
In the hardness testing process, in order to ensure accurate application of test force, the gesture change before and after the test of the test pressure head is truly reflected, so that the size or depth of the test pressure head can be accurately measured, and the positioning of the main shaft of the hardness tester is required to be accurate and stable. Particularly, in the case of high test accuracy, such as various reference durometers, the clearance between the spindle and the guide is required to be controlled to be 0.001-0.002mm, and further the friction force is required to be controlled to be in a very small and stable state.
Currently, in the brinell hardness tester and the rockwell hardness tester, a ball guide structure is generally adopted as a main shaft structure. The upper end and the lower end of the main shaft are respectively provided with a group of steel balls, the outer sides of the steel balls are contacted with the positioning sleeve, the inner sides of the steel balls are positioned for the main shaft, a ball frame is arranged between the steel balls to realize isolation, and the ball frame is fixed on the fixed beam by hexagonal cylindrical head screws. The machining precision of the structure is limited by machining, and micron-level high-precision gap positioning is difficult to realize; the steel ball is in linear contact with the main shaft, so that the contact area is small, and the rigidity is poor; the steel ball is in a semi-sliding and semi-rolling state, and the friction force between the steel ball and the main shaft is unstable and difficult to control. When the precision is reduced due to the abrasion of the parts at the later stage, the parts are required to be completely disassembled for maintenance, and the parts are replaced, assembled and debugged again, so that the maintenance is troublesome.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a radial adjustable high-precision durometer spindle mechanism capable of overcoming the defects, wherein micron-level high-precision positioning can be realized between a spindle and a small-clearance deep groove ball bearing, rolling friction force is small and constant, high perpendicularity between the spindle and a workpiece testing surface is easy to realize, the spindle positioning is accurate and stable, the stability of force during test can be ensured, and meanwhile, the spindle mechanism is easy to maintain and replace and convenient to adjust.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The radial adjustable high-precision durometer spindle mechanism comprises a spindle, two sets of adjusting devices and a fixed beam; wherein, the two sets of adjusting devices are respectively fixed at the corresponding positions of the upper part and the lower part of the fixed beam, and the main shaft is contacted and penetrated into the corresponding central positions of three groups of small-clearance deep groove ball bearings in the upper and lower sets of adjusting devices; the small-clearance deep groove ball bearing is arranged at the eccentric position of the eccentric shaft and can synchronously rotate with the eccentric shaft; the outer circles of a group of small-clearance deep groove ball bearings corresponding up and down in the two sets of adjusting devices are correspondingly tangent to a single-side plane of the main shaft, and the outer circles of the other two groups of small-clearance deep groove ball bearings corresponding up and down are correspondingly tangent to the outer circle of the main shaft.
The adjusting device comprises a mounting seat, three eccentric shafts and three small-clearance deep groove ball bearings, wherein the eccentric shafts penetrate into the mounting seat, the small-clearance deep groove ball bearings and an adjusting washer are sequentially arranged on the eccentric shafts in a penetrating manner, and a flat washer is arranged at the other end of each eccentric shaft in a penetrating manner and is locked and fixed by a nut; after the verticality adjustment of the main shaft position is completed, the position of the eccentric shaft is fixed by a set screw.
Three small-clearance deep groove ball bearings in the adjusting device are uniformly distributed in a trisection mode by taking the main shaft as the center.
The three eccentric shafts in the adjusting device are uniformly distributed in a trisection way by taking the main shaft as the center.
The eccentric distance of 3-5mm is arranged at the eccentric position of the eccentric shaft.
The axial height of the single-side plane of the main shaft is larger than the working stroke of the main shaft, and the width of the single-side plane of the main shaft is larger than the width of the outer ring of the small-clearance deep groove ball bearing.
The base of the mounting seat is of a circular structure, a central hole for vertically penetrating through the main shaft is formed in the central portion of the base, and the tops of the excircles of the three small-clearance deep groove ball bearings which are uniformly distributed in a trisection mode with the main shaft as the center protrude out of the surface of the central hole.
And three mounting grooves for accommodating three small-clearance deep groove ball bearings are formed in the mounting seat and are uniformly distributed in a trisection manner by taking the main shaft as the center.
The mounting groove is of a rectangular structure, and the groove width of the mounting groove is larger than the outer ring width of the small-clearance deep groove ball bearing.
And three groups of mounting holes for penetrating the three eccentric shafts are uniformly distributed on the mounting seat in a trisection way by taking the main shaft as the center, each group of mounting holes are arranged on two opposite side walls of the mounting groove, and the mounting holes are perpendicular to the central axis of the central hole.
Compared with the prior art, the utility model has the following advantages and positive effects:
The utility model is to place the main shaft in the central position of two sets of adjusting devices up and down, the adjusting device is made up of three eccentric shafts and three small clearance deep groove ball bearings on it that equipartition sets up on the mount pad, the eccentric shaft fixes the small clearance deep groove ball bearing in the mounting groove of the mount pad, prevent the position change in the course of adjusting, make small clearance deep groove ball bearing and main shaft clearance carry on the linear adjustment when rotating the eccentric shaft, realize the main shaft is close to zero clearance location, can reach the high-accuracy clearance location of micron level, easy to realize the higher perpendicularity between work piece test surface and main shaft location is accurate and stable, thus guarantee the stability of the force when the main shaft is tested.
The installation distance of the upper and lower sets of adjusting devices can be changed according to the length of the main shaft, so that the working stability of the main shaft is ensured to the greatest extent; the verticality of the main shaft can be optimized by integrally matching and adjusting the upper and lower sets of adjusting devices. The small-clearance deep groove ball bearing is used as a guide piece, so that rolling friction in the whole process is realized, the rolling friction force is very small and constant, and the control of the applied test force is facilitated; the eccentric shaft is stable in position and is fastened and prevented from loosening by being matched with a set screw. The main shaft has good rigidity and high strength, can bear larger lateral force, and is convenient for adjusting and maintaining stable working state. The single-sided plane of the main shaft can limit the circumferential rotation freedom degree of the main shaft.
The two sets of adjusting devices adopt a structure with the main shaft as the center and evenly distributed in three parts, the adjustment is simple, convenient and applicable, and the higher verticality between the main shaft and the workpiece testing surface is easy to realize; meanwhile, the adjusting device is simple in structure, high in applicability, easy to maintain and replace and convenient to adjust.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
Fig. 2 is a cross-sectional view A-A of fig. 1.
The components illustrated in fig. 1-2:
1. A hexagon socket head cap screw; 2. a main shaft; 2-1, a single-sided plane; 3. an upper adjusting device; 4. a fixed beam; 5. a lower adjusting device; 6. adjusting the gasket; 7. a nut; 8. a flat gasket; 9. a small-clearance deep groove ball bearing; 10. an eccentric shaft; 10-1, eccentric position; 11. a mounting base; 12. and (5) setting the screw.
Detailed Description
The utility model is further described with reference to the drawings and detailed description which follow:
As shown in fig. 1-2, the radial adjustable high-precision sclerometer spindle mechanism of the utility model comprises two sets of adjusting devices, a spindle 2 and a fixed beam 4, wherein:
As shown in fig. 2, the two sets of adjusting devices are an upper adjusting device 3 and a lower adjusting device 5 which have the same structure, and are respectively fixed at corresponding positions of the upper part and the lower part of the fixed beam 4 by using hexagon socket head cap screws 1. The main shaft 2 vertically passes through the through hole on the fixed beam 4, and the main shaft 2 contacts and penetrates into the corresponding central positions of three groups of small-clearance deep groove ball bearings 9 in the upper and lower adjusting devices.
A single-sided plane 2-1 is axially arranged on the main shaft 2; the height of the single-side plane 2-1 is larger than the working stroke of the main shaft, and the width of the single-side plane is larger than the width of the outer ring of the small-clearance deep groove ball bearing 9. The single-sided plane 2-1 of the main shaft can limit the circumferential rotation freedom degree of the main shaft.
The excircle of a group of small-clearance deep groove ball bearings 9 corresponding to the same position from top to bottom in the two sets of adjusting devices is in tangential contact with the single-side plane 2-1 of the main shaft; the excircles of the other two groups of small-clearance deep groove ball bearings 9 corresponding to the same position from top to bottom in the two sets of adjusting devices are tangential and contacted with the excircle of the main shaft. After the verticality adjustment of the main shaft position is completed, the position of the eccentric shaft 10 is locked and fixed by the nut 7 and fixed by the set screw 12.
As shown in fig. 1, the upper adjusting device 3 comprises a mounting seat 11, three eccentric shafts 10 and three small-clearance deep groove ball bearings 9; wherein the base of the mounting seat 11 has a circular structure, and a central hole for vertically passing through the spindle 2 is arranged at the central part thereof.
Three mounting grooves for arranging three small-clearance deep groove ball bearings 9 are uniformly distributed on the mounting seat 11 in a trisection way by taking the main shaft as the center, and the mounting grooves are of rectangular structures, and the groove width of the mounting grooves is larger than the outer ring width of the small-clearance deep groove ball bearings 9.
Three groups of mounting holes for penetrating the three eccentric shafts 10 are uniformly distributed on the mounting seat 11 in a trisection way by taking the main shaft as the center, and the mounting holes are perpendicular to the central axis of the central holes. Each set of mounting holes is arranged on two opposite side walls of the mounting groove, in particular to a large through hole and a small through hole which are matched with the large shaft diameter part and the small shaft diameter part of the eccentric shaft 10 respectively. The top of the outer circle of three small-clearance deep groove ball bearings 9 which are uniformly distributed on the mounting seat 11 in a trisection way by taking the main shaft as the center protrudes out of the surface of the central hole.
The eccentric shaft 10 horizontally penetrates into a corresponding mounting hole arranged on the mounting seat 11, sequentially penetrates through the small-clearance deep groove ball bearing 9 and the adjusting washer 6, penetrates into the flat washer 8 at the other end of the eccentric shaft 10, and is locked and fixed by the nut 7. The adjustment washer 6 is installed to prevent axial movement of the small play deep groove ball bearing. A small-clearance deep groove ball bearing 9 is arranged at the eccentric position 10-1 of the eccentric shaft, and can rotate synchronously with the eccentric shaft. The eccentric distance of 3-5mm is set at the eccentric position 10-1 of the eccentric shaft. All the same mounting holes on the two mounting seats 11 are assembled by adopting the structure, and two sets of adjusting devices can be formed after the assembly is completed.
The embodiment comprises two sets of adjusting devices, wherein three eccentric shafts 10 and three small-clearance deep groove ball bearings 9 are uniformly distributed in each set of adjusting device in a trisection way by taking a main shaft as a center, and the embodiment is the best scheme. Of course, the number of adjusting devices and the number of eccentric shafts 10 and small play deep groove ball bearings 9 per set of adjusting devices may be chosen additionally according to the actual situation.
The working principle of the utility model is as follows: referring to fig. 1-2.
Rotating and adjusting eccentric shafts 10 at a group of upper and lower corresponding positions in the upper and lower adjusting devices of the fixed beam 4, enabling the excircles of the small-clearance deep groove ball bearings 9 on the two groups of eccentric shafts to be in tangential contact with the single-side plane 2-1 of the main shaft, testing the verticality of the corresponding main shaft position by using an instrument, and repeatedly adjusting the rotation angle of the eccentric shafts 10 at the upper and lower corresponding positions until the relation of the upper and lower positions of the single-side plane of the main shaft reaches the required verticality in the test;
Then sequentially rotating and adjusting eccentric shafts 10 at the upper part and the lower part of the fixed beam 4 at the upper and lower corresponding positions of the other two groups of eccentric shafts, enabling the excircles of the small-clearance deep groove ball bearings on the two groups of eccentric shafts to be in tangential contact with the excircles of the main shafts, testing the verticality of the positions of the main shafts corresponding to the two groups of eccentric shafts by using an instrument, and repeatedly adjusting the rotation angles of the eccentric shafts 10 at the upper and lower corresponding positions of the two groups of eccentric shafts until the position relation of the main shafts corresponding to the two groups of eccentric shafts reaches the verticality required in the test; then using a spanner to fix nuts 7 on all eccentric shafts 10 and fix all set screws 12 on the mounting seat 11;
after the whole debugging process is finished, the main shaft 2 can slide up and down in the upper part and the lower part adjusting devices of the fixed beam 4, so that the stability of force during the main shaft test is ensured.
Claims (10)
1. The radial adjustable high-precision durometer spindle mechanism is characterized by comprising a spindle, two sets of adjusting devices and a fixed beam; wherein, the two sets of adjusting devices are respectively fixed at the corresponding positions of the upper part and the lower part of the fixed beam, and the main shaft is contacted and penetrated into the corresponding central positions of three groups of small-clearance deep groove ball bearings in the upper and lower sets of adjusting devices; the small-clearance deep groove ball bearing is arranged at the eccentric position of the eccentric shaft and can synchronously rotate with the eccentric shaft; the outer circles of a group of small-clearance deep groove ball bearings corresponding up and down in the two sets of adjusting devices are correspondingly tangent to a single-side plane of the main shaft, and the outer circles of the other two groups of small-clearance deep groove ball bearings corresponding up and down are correspondingly tangent to the outer circle of the main shaft.
2. The radial adjustable high-precision durometer spindle mechanism of claim 1, wherein the adjusting device comprises a mounting seat, three eccentric shafts and three small-clearance deep groove ball bearings, wherein the eccentric shafts penetrate into the mounting seat, the small-clearance deep groove ball bearings and the adjusting washers are sequentially penetrated through the eccentric shafts, the flat washers are penetrated into the other ends of the eccentric shafts, and the flat washers are locked and fixed by nuts; after the verticality adjustment of the main shaft position is completed, the position of the eccentric shaft is fixed by a set screw.
3. The radially adjustable high-precision durometer spindle mechanism of claim 2, wherein three small-play deep groove ball bearings in the adjusting device are uniformly distributed in a trisection with the spindle as a center.
4. The radially adjustable high-precision durometer spindle mechanism of claim 3, wherein the three eccentric shafts in the adjusting device are uniformly distributed in a trisection with the spindle as a center.
5. The radially adjustable high precision durometer spindle mechanism of claim 4, wherein the eccentric of the eccentric shaft is provided with an eccentricity of 3-5 mm.
6. The radially adjustable high precision durometer spindle mechanism of claim 5, wherein the axial height of the spindle single side plane is greater than the working stroke of the spindle, and the width of the spindle single side plane is greater than the outer ring width of the small clearance deep groove ball bearing.
7. The spindle mechanism of any one of claims 2 to 6, wherein the base of the mounting seat has a circular structure, a central hole for vertically passing through the spindle is formed in the central part of the base, and the top of the outer circle of three small-clearance deep groove ball bearings uniformly distributed in a trisection manner with the spindle as the center protrudes out of the surface of the central hole.
8. The radially adjustable high-precision durometer spindle mechanism of claim 7, wherein the mounting base is provided with three mounting grooves for mounting three small-clearance deep groove ball bearings, and the three mounting grooves are uniformly distributed in a trisection manner with the spindle as a center.
9. The radially adjustable high precision durometer spindle mechanism of claim 8, wherein the mounting groove has a rectangular configuration with a groove width greater than the outer ring width of the small clearance deep groove ball bearing.
10. The radial adjustable high-precision durometer spindle mechanism of claim 9, wherein three groups of mounting holes for penetrating three eccentric shafts are uniformly distributed on the mounting base in a trisection way with the spindle as a center, each group of mounting holes is arranged on two opposite side walls of the mounting groove, and the mounting holes are perpendicular to the central axis of the central hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322784118.5U CN220850338U (en) | 2023-10-17 | 2023-10-17 | Radial adjustable high-precision hardness tester spindle mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322784118.5U CN220850338U (en) | 2023-10-17 | 2023-10-17 | Radial adjustable high-precision hardness tester spindle mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220850338U true CN220850338U (en) | 2024-04-26 |
Family
ID=90740000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322784118.5U Active CN220850338U (en) | 2023-10-17 | 2023-10-17 | Radial adjustable high-precision hardness tester spindle mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220850338U (en) |
-
2023
- 2023-10-17 CN CN202322784118.5U patent/CN220850338U/en active Active
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