Fixture for fixing steel ball

Abstract

The utility model belongs to the technical field of measuring instruments, and particularly provides a fixture for fixing a steel ball, which comprises a fixture seat, an annealing disc, a magnetic disc and a steel ball sucker, a groove is arranged in the middle of the steel ball sucker, the lower surface of the steel ball sucker is connected with the upper surface of the magnetic disc, and the middle of the magnetic disc sequentially penetrates through the annealing disc and the fixture seat from top to bottom. A first magnetic core is connected to the annealing disc, and a second magnetic core is connected to the magnetic disc. The problems that when an existing precision measuring instrument measures the steel ball, the steel ball cannot be effectively fixed, the position of the steel ball is inconvenient to adjust, and the measuring requirement cannot be met are solved, the steel ball can be effectively fixed without a clamping component, damage to the steel ball during clamping is avoided, the steel ball can be taken away or adjusted only through demagnetization, the structure is simple, and the cost is low. And the measurement requirement is well met.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring instruments, and in particular relates to a clamp for fixing a steel ball. Background Art

[0002] When measuring steel ball workpieces with roundness meters and contour meters, the inspector needs to fix the steel ball first before the actual measurement can be performed. When measuring the contour, the workpiece can be roughly placed directly below the probe so that the measured section can be measured normally, and the workpiece can be moved with the help of a fine-tuning platform. When measuring the roundness, the workpiece needs to be adjusted to the rotation center of the roundness meter worktable, and the requirement cannot be met without the help of other fixing devices. When fixing the workpiece, it cannot be clamped or squeezed to prevent its deformation, especially when measuring steel balls. The inability to effectively fix and adjust the position of the steel ball is a distress for inspectors.

[0003] A Chinese patent document with publication number CN216422302U discloses a steel ball clamp, comprising a first clamp arm and a second clamp arm, wherein a first rotating connector is provided at the bottom end of the first clamp arm, the first rotating connector is connected to a first arc-shaped clamp plate, a first tension spring is provided on the side wall of the first arc-shaped clamp plate, a first connecting rod is provided at the upper end of the first tension spring, a first connecting rod is provided at the first connecting rod, a first ring is provided on the first connecting rod, and a first hook is also provided at the upper end of the second grab; a second rotating connector is provided at the bottom end of the second clamp arm, the second rotating connector is connected to the second arc-shaped clamp plate, a second tension spring is provided on the side wall of the second arc-shaped clamp plate, a second connecting rod is provided at the upper end of the second tension spring, a second connecting rod is provided at the second connecting rod, a second ring is provided on the second connecting rod, and a second hook is also provided at the upper end of the first grab; the document forms a clamp plate that fits the bottom of the steel ball through the mutual attraction of the first arc-shaped clamp plate and the second arc-shaped clamp plate, thereby clamping and fixing the bottom of the steel ball to prevent it from loosening and falling; there is a problem of steel ball deformation. Utility Model Content

[0004] The utility model provides a fixture for fixing a steel ball, aiming to overcome the problem in the prior art that when precision measuring instruments measure steel balls, the steel balls cannot be effectively fixed, the position of the steel balls cannot be adjusted conveniently, and the measurement requirements cannot be met.

[0005] To this end, the utility model provides a fixture for fixing a steel ball, including a fixture seat, a magnetic disk, a magnetic disk and a steel ball suction cup, a groove is provided on the middle of the steel ball suction cup, the bottom of the steel ball suction cup is connected to the top of the magnetic disk, the middle of the magnetic disk is connected to the magnetic disk and the fixture seat in sequence from top to bottom, a magnetic core 1 is provided on the magnetic disk, and a magnetic core 2 is provided on the magnetic disk.

[0006] Preferably, the steel ball suction cup is in the shape of a cone with the tip facing upward.

[0007] Preferably, the groove is in the shape of a pyramid with its tip pointing downward, and the number of sides of the bottom surface of the pyramid is an odd number.

[0008] Preferably, a copper weld is longitudinally arranged in the middle of the steel ball suction cup.

[0009] Preferably, the magnetic core 2 includes an N pole group 2 and an S pole group 2, and the N pole group 2 and the S pole group 2 are symmetrically distributed left and right with the disk diameter as the center line; the N pole group 2 includes multiple N poles 2, and the S pole group 2 includes multiple S poles 2, and the multiple N poles 2 and the multiple S poles 2 are distributed at intervals, and the N poles 2 and the S poles 2 both penetrate the disk longitudinally.

[0010] Preferably, the magnetic core 1 includes an N pole group 1 and an S pole group 1, and the N pole group 1 and the S pole group 1 are symmetrically distributed left and right with the diameter of the demagnetized disk as the center line; the N pole group 1 includes multiple N poles 1, and the S pole group 1 includes multiple S poles 1, the multiple N poles 1 and the multiple S poles 1 are distributed at intervals, and the N pole 1 and the S pole 1 both penetrate the demagnetized disk longitudinally.

[0011] Preferably, the distribution of the magnetic core 2 is the same as that of the magnetic core 1.

[0012] Preferably, the magnetic disk is cylindrical in shape, the lower center of the cylinder protrudes downward, the protrusion is shaped like a two-level stepped column, the diameter of the two-level stepped column decreases from top to bottom, the protrusion and the fixture seat are in interference fit, and the protrusion and the retracted magnetic disk are in clearance fit.

[0013] Preferably, the outer sides of the withdrawn magnetic disk and the magnetic disk are both provided with marks.

[0014] Preferably, the fixture seat is made of steel.

[0015] Beneficial effects of the utility model:

[0016] 1. The fixture for fixing a steel ball provided by the utility model comprises a fixture seat, a magnetic disk, a magnetic disk and a steel ball sucker. A groove is provided on the middle of the steel ball sucker. The lower part of the steel ball sucker is connected to the upper part of the magnetic disk. The middle part of the magnetic disk sequentially passes through the magnetic disk and the fixture seat from top to bottom. A magnetic core 1 is provided on the magnetic disk and a magnetic core 2 is provided on the magnetic disk. By providing a groove on the middle of the steel ball sucker, it is convenient to place the steel ball in the groove when in use. By rotating the magnetic disk, the magnetic core 1 and the magnetic core 2 on the same longitudinal line are connected. The polarities of the magnetic cores 1 and 2 are the same or different. When the polarities of the magnetic cores 1 and 2 at the same longitudinal line are the same, it is in the magnetized state, the steel ball in the groove is attracted, so that the steel ball is in the measuring state, and the steel ball can be measured; when the polarities of the magnetic cores 1 and 2 at the same longitudinal line are different, it is in the demagnetized state, the steel ball in the groove is not attracted, and the steel ball can be taken away; the steel ball can be effectively fixed without clamping parts, avoiding damage to the steel ball during clamping, and the steel ball can be taken away or adjusted by demagnetization. The structure is simple and meets the measurement needs well.

[0017] 2. The fixture for fixing the steel ball provided by the utility model has a cylindrical disk, the center of the lower side of the cylinder protrudes downward, the protrusion is in the shape of a two-level stepped column, the diameter of the two-level stepped column decreases from top to bottom, the protrusion is connected with the magnetic disk by a clearance fit, and this shape can satisfy the rotation of the magnetic disk, and the position of the polarity of the magnetic core can be adjusted by rotating the magnetic disk; at the same time, the protrusion and the fixture seat are interference fit to ensure that the fixture seat is stationary when the magnetic disk is rotating.

[0018] 3. The fixture for fixing the steel ball provided by the utility model has a groove in the shape of a pyramid with the tip facing downward, and the number of sides of the bottom surface of the pyramid is an odd number. This structure improves the stability after the steel ball is placed, and prevents the steel ball from rolling and shifting due to the contact of the probe during measurement, which affects the centering of the steel ball and causes the measurement data to deviate from the actual problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Figure 1 This is a longitudinal cross-sectional view of the structure of the fixture that fixes the steel ball ( Figure 5 AA direction);

[0021] Figure 2 It is a longitudinal cross-sectional view of the structure of the steel ball suction cup;

[0022] Figure 3 This is a top view of the structure of the steel ball suction cup;

[0023] Figure 4 It is the main view of the disk structure;

[0024] Figure 5 It is a top view of the structure of the magnetic core 2;

[0025] Figure 6 This is the main view of the structure of the ejected disk;

[0026] Figure 7 It is a top view of the structure of the magnetic core 1;

[0027] Figure 8 It is the structural front view of the fixture seat;

[0028] Fig. 9 It is a top view of the structure of the fixture seat.

[0029] Explanation of the reference numerals: 1. fixture seat; 2. magnetic disk; 3. magnetic disk; 4. steel ball suction cup; 2.1. magnetic core 1; 3.1. magnetic core 2; 4.1. groove; 4.2. copper welding. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] Embodiment 1:

[0032] like Figure 1 , Figure 5 and Figure 7 As shown, a fixture for fixing a steel ball comprises a fixture seat 1, a magnetic disk 2, a magnetic disk 3 and a steel ball suction cup 4, a groove 4.1 is provided on the middle of the steel ball suction cup 4, the bottom of the steel ball suction cup 4 is connected to the top of the magnetic disk 3, the middle of the magnetic disk 3 sequentially penetrates the magnetic disk 2 and the fixture seat 1 from top to bottom, the magnetic disk 2 is provided with a magnetic core 1 2.1, and the magnetic disk 3 is provided with a magnetic core 2 3.1.

[0033] By opening a groove 4.1 on the middle of the steel ball suction cup 4, it is convenient to put the steel ball ( Figure 1 The top dotted line is a steel ball) and is placed in the groove 4.1; by rotating the demagnetizing disk 2, the polarities of the magnetic core 1 2.1 and the magnetic core 2 3.1 at the same longitudinal line are made the same or different. When the polarities of the magnetic core 1 2.1 and the magnetic core 2 3.1 at the same longitudinal line are the same, it is in the upper magnetization state, the steel ball in the groove 4.1 is attracted, and the steel ball is in the measuring state, and the steel ball can be measured; when the polarities of the magnetic core 1 2.1 and the magnetic core 2 3.1 at the same longitudinal line are different, it is in the demagnetization state, the steel ball in the groove 4.1 is not attracted, and the steel ball can be taken away; the steel ball can be effectively fixed without a clamping component, avoiding damage to the steel ball during clamping, and the steel ball can be taken away or adjusted by demagnetization. The structure is simple and meets the measurement requirements well.

[0034] Preferably, the bottom of the steel ball sucker 4 is bonded to the top of the magnetic disk 3; the bonding structure is simple, and no additional structure is required to firmly bond the steel ball sucker 4 and the magnetic disk 3. Specifically, the bottom of the steel ball sucker 4 is bonded to the top of the magnetic disk 3.

[0035] Embodiment 2:

[0036] On the basis of Example 1, Figure 2 and Figure 3 As shown, the steel ball suction cup 4 is in the shape of a cone with the tip facing upwards, which has a simple and beautiful structure and good stability.

[0037] Preferably, the groove 4.1 is in the shape of a pyramid with its tip pointing downward, and the number of sides of the bottom surface of the pyramid is an odd number.

[0038] Specifically, the pyramid-shaped groove 4.1 is convenient for placing a steel ball. The number of sides of the pyramid base is odd. Compared with the even-numbered sides, the odd-numbered sides have better stability after the steel ball is placed, thereby preventing the steel ball from rolling and shifting due to the contact of the probe during measurement, affecting the centering of the steel ball and causing the measurement data to deviate from the actual problem.

[0039] Preferably, a copper weld 4.2 is longitudinally arranged in the middle of the steel ball suction cup 4.

[0040] Specifically, the steel ball suction cup 4 is divided into two parts by filling copper welding 4.2, which plays a role in isolating magnetism and avoiding magnetic crosstalk.

[0041] Preferably, the apex angle of the pyramid is 120 degrees. A pyramid of this shape is easy to place a steel ball and has good stability, and the apex angle can also be set according to actual conditions.

[0042] Embodiment 3:

[0043] On the basis of Example 2, Figure 5 As shown, the magnetic core 2 3.1 includes an N pole group 2 and an S pole group 2, with the diameter of the disk 3 as the center line, the N pole group 2 and the S pole group 2 are symmetrically distributed on the left and right; the N pole group 2 includes multiple N poles 2, and the S pole group 2 includes multiple S poles 2, the multiple N poles 2 and the multiple S poles 2 are distributed at intervals, and the N poles 2 and the S poles 2 both penetrate the disk 3 longitudinally.

[0044] Specifically, the core 2 3.1 is as follows Figure 5 As shown, it is divided into two arrays (N pole group 2 and S pole group 2), and the magnetic poles of the two arrays are opposite (N pole and S pole), which is convenient for magnetizing and demagnetizing with the magnetic pole combination of the magnetic core 1 2.1, and the structure is simple. The magnetic core 1 2.1 is embedded in the demagnetizing disk 2 according to specific requirements (a certain arrangement order).

[0045] Preferably, Figure 7 As shown, the magnetic core 2.1 includes an N pole group 1 and an S pole group 1, with the diameter of the debonding magnetic disk 2 as the center line, the N pole group 1 and the S pole group 1 are symmetrically distributed on the left and right; the N pole group 1 includes multiple N poles 1, the S pole group 1 includes multiple S poles 1, the multiple N poles 1 and the multiple S poles 1 are distributed at intervals, and the N pole 1 and the S pole 1 both penetrate the debonding magnetic disk 2 longitudinally.

[0046] Specifically, the core 2 3.1 is as follows Figure 7 As shown, it is divided into two arrays (N pole group 1 and S pole group 1, and the magnetic poles of the two arrays are opposite (N pole and S pole), which is convenient for magnetizing and demagnetizing with the magnetic pole combination of the magnetic core 2 3.1, and the structure is simple. The magnetic core 2 3.1 is embedded in the disk 3 according to specific requirements (a certain arrangement order).

[0047] Preferably, the distribution of the magnetic core 2 3.1 is the same as that of the magnetic core 1 2.1.

[0048] Specifically, the distribution and structure of the second magnetic core 3.1 and the first magnetic core 2.1 are the same, so as to facilitate sufficient magnetization and demagnetization.

[0049] Preferably, Figure 6As shown, the outer sides of the ejection disk 2 and the disk 3 are both provided with marks.

[0050] Specifically, marks are engraved on the outer surfaces of the diameters of the demagnetization disk 2 and the disk 3, i.e., their dividing lines, to indicate whether to magnetize or demagnetize, and whether to fix the steel ball or remove the steel ball. The demagnetization disk 2 functions to demagnetize or magnetize. When the demagnetization disk 2 is rotated to the magnetization state, measurement can be performed; when the demagnetization disk 2 is rotated to the demagnetization state, the steel ball can be removed.

[0051] Preferably, Figure 4 , Figure 8 and Fig. 9 As shown, the magnetic disk 3 is cylindrical in shape, the center of the bottom of the cylinder bulges downward, the bulge is in the shape of a two-stage stepped column, the diameter of the two-stage stepped column decreases from top to bottom, and there is an interference fit between the bulge and the fixture seat 1.

[0052] Specifically, there is an interference fit between the protrusion and the fixture seat 1, which ensures that the fixture seat 1 does not move when the de-stuck magnetic disk 2 rotates.

[0053] Preferably, there is a clearance fit between the protrusion and the debonding magnetic disk 2 .

[0054] Specifically, the step shaft (protrusion) of the ejection disk 2 and the disk 3 is clearance-matched, ensuring that the ejection disk 2 can rotate freely. The ejection disk 2 can be moved and rotated around the protrusion of the disk 3.

[0055] Preferably, the clamp seat 1 is made of steel.

[0056] Specifically, the fixture seat 1 is a steel part, which can be adsorbed on the workbench of the roundness meter (contour measuring instrument).

[0057] Preferably, the material of the magnetic disk 3 is brass.

[0058] Preferably, the outer diameter of the ejection disk 2 is larger than the outer diameter of the disk 3, so as to facilitate the rotation of the ejection disk 2.

[0059] Embodiment 4:

[0060] On the basis of Example 3, when the steel ball is placed in the groove 4.1, in the absence of other forces, the roundness meter probe contacts the steel ball, and due to the pressure of the probe, the steel ball moves and "stands" unsteadily, and the measurement cannot be completed.

[0061] Rotate the demagnetizing disk 2. When the magnetic poles of the core 1 2.1 on the upper surface of the demagnetizing disk 2 are inconsistent with the polarity of the core 2 3.1 on the upper surface of the disk 3, the magnetic forces of the core 1 2.1 and the core 2 3.1 are exactly offset, and the disk is in a demagnetizing state. The steel ball at the groove 4.1 is not "sucked". This can also be seen from the marks on the outside of the disk 3 and the demagnetizing disk 2 (the steel ball is not fixed). At this time, the steel ball is not in a measuring state and can be removed.

[0062] Rotate the ejection disk 2. When the magnetic poles of the magnetic core 1 2.1 on the upper surface of the ejection disk 2 are consistent with the polarity of the magnetic core 2 3.1 on the upper surface of the disk 3, the magnetic forces of the magnetic core 1 2.1 and the magnetic core 2 3.1 are superimposed on each other, and the steel ball at the groove 4.1 is "attracted". This can also be seen from the marks on the outer sides of the disk 3 and the ejection disk 2 (fixed steel ball). At this time, the steel ball is in the measurement state and can be measured.

[0063] Before measurement, the steel ball is required to be at the rotation center of the roundness instrument measuring table. When the steel ball is not at the rotation center, the position of the fixture seat 1 can be adjusted to drive this mechanism to make the steel ball at the rotation center.

[0064] In the description of the present invention, it is necessary to understand that if there are terms such as "upper" and "lower" indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention.

[0065] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A fixture for fixing a steel ball, characterized in that: The invention comprises a fixture seat (1), a magnetic disk (2), a magnetic disk (3), a steel ball suction cup (4), a magnetic core 1 (2.1) and a magnetic core 2 (3.1). A groove (4.1) is provided on the middle part of the steel ball suction cup (4). The lower part of the steel ball suction cup (4) is connected to the upper part of the magnetic disk (3). The middle part of the magnetic disk (3) sequentially passes through the magnetic disk (2) and the fixture seat (1) from top to bottom. The magnetic core 1 (2.1) is connected to the upper part of the magnetic disk (2), and the magnetic core 2 (3.1) is connected to the upper part of the magnetic disk (3).

2. The fixture for fixing a steel ball according to claim 1, characterized in that: The steel ball suction cup (4) is in the shape of a cone with the tip pointing upward.

3. The fixture for fixing a steel ball according to claim 1, characterized in that: The groove (4.1) is in the shape of a pyramid with its tip pointing downward, and the number of sides of the bottom surface of the pyramid is an odd number.

4. The fixture for fixing a steel ball according to claim 2, characterized in that: A copper weld (4.2) is longitudinally arranged in the middle of the steel ball suction cup (4).

5. The fixture for fixing a steel ball according to claim 1, characterized in that: The magnetic core 2 (3.1) comprises an N pole group 2 and an S pole group 2, with the diameter of the magnetic disk (3) as the center line, the N pole group 2 and the S pole group 2 are symmetrically distributed left and right; the N pole group 2 comprises a plurality of N poles 2, the S pole group 2 comprises a plurality of S poles 2, the plurality of N poles 2 and the plurality of S poles 2 are distributed at intervals, and the N poles 2 and the S poles 2 both penetrate the magnetic disk (3) longitudinally.

6. The fixture for fixing a steel ball according to claim 5, characterized in that: The magnetic core 1 (2.1) comprises an N pole group 1 and an S pole group 1, with the diameter of the demagnetized disk (2) as the center line, and the N pole group 1 and the S pole group 1 are symmetrically distributed on the left and right; the N pole group 1 comprises a plurality of N poles 1, and the S pole group 1 comprises a plurality of S poles 1, and the plurality of N poles 1 and the plurality of S poles 1 are distributed at intervals, and the N pole 1 and the S pole 1 both penetrate the demagnetized disk (2) longitudinally.

7. The fixture for fixing a steel ball according to claim 6, characterized in that: The distribution of the magnetic core 2 (3.1) is the same as that of the magnetic core 1 (2.1).

8. The fixture for fixing a steel ball according to claim 1, characterized in that: The magnetic disk (3) is cylindrical in shape, the center of the lower side of the cylinder is convex downward, the convex shape is a two-stage stepped column, the diameter of the two-stage stepped column decreases from top to bottom, the convexity and the fixture seat (1) are in interference fit, and the convexity and the retracted magnetic disk (2) are in clearance fit.

9. The fixture for fixing a steel ball according to claim 1, characterized in that: The outer sides of the withdrawn magnetic disk (2) and the magnetic disk (3) are both provided with connected marks.

10. The fixture for fixing a steel ball according to claim 1, characterized in that: The material of the fixture seat (1) is steel.

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