A precision shaft system with three-point contact positioning structure

Abstract

The present application belongs to the technical field of precision shafting, and discloses a precision shafting adopting a three-point contact positioning structure, wherein the precision shafting adopting the three-point contact positioning structure comprises: a main shaft, a three-point contact positioning structure and a centering structure; the main shaft is provided with an upper spherical mover structure and a lower spherical mover structure; the upper spherical mover structure is connected to the three-point contact positioning structure; the lower spherical mover structure is connected to the centering structure; the three-point contact positioning structure is used to position the upper spherical mover structure by making three-point contact with the upper spherical mover structure along the circumferential direction; the centering structure is used to center the lower spherical mover structure to realize the centering of the main shaft; the precision shafting adopting the three-point contact positioning structure composed of the above structure can realize the support function of the main shaft in a smaller volume and with higher precision through the three-point contact positioning structure and the centering structure, effectively reducing the manufacturing difficulty and installation difficulty of the precision shafting, and improving the precision of the precision shafting.

Description

Technical Field

[0001] The present application relates to the technical field of precision shafting, and in particular to a precision shafting using a three-point contact positioning structure. Background Art

[0002] The mechanical accuracy of small precision shafting systems using traditional bearings mainly depends on the following aspects: bearing accuracy, shaft manufacturing accuracy, support structure accuracy and installation accuracy. This makes the accuracy of small precision shafting systems using traditional bearings affected by many factors, and places extremely high requirements on the mechanical accuracy of each component and the assembly accuracy of the system.

[0003] Therefore, in order to solve the technical problem that the accuracy of small precision shaft systems of traditional bearings has extremely high requirements on the mechanical accuracy and assembly accuracy of each component, a precision shaft system with a three-point contact positioning structure is urgently needed. Summary of the Invention

[0004] The purpose of this application is to provide a precision shafting system adopting a three-point contact positioning structure, by which the upper spherical mover structure is positioned by the three-point contact positioning structure, and the lower spherical mover structure is aligned by the centering structure, thereby ensuring the accuracy of the precision shafting system adopting the three-point contact positioning structure, and solving the problem that the accuracy of small precision shafting systems of traditional bearings has extremely high requirements on the mechanical accuracy and assembly accuracy of each component. Through the three-point contact positioning structure and the centering structure, the support function of the main shaft can be achieved in a smaller volume and higher precision, effectively reducing the manufacturing difficulty and installation difficulty of the precision shafting system, and improving the accuracy of the precision shafting system.

[0005] In a first aspect, the present application provides a precision shafting system using a three-point contact positioning structure, comprising a main shaft, a three-point contact positioning structure, and a centering structure; the main shaft is provided with an upper spherical mover structure and a lower spherical mover structure; the upper spherical mover structure is connected to the three-point contact positioning structure; the lower spherical mover structure is connected to the centering structure;

[0006] The three-point contact positioning structure is used to position the upper spherical mover structure by making three-point contact with the upper spherical mover structure along the circumferential direction;

[0007] The centering structure is used to center the lower spherical mover structure to achieve centering of the main shaft.

[0008] The precision shafting system provided by the present application using a three-point contact positioning structure can improve the accuracy of the precision shafting system. The upper spherical mover structure is positioned by the three-point contact positioning structure, and the lower spherical mover structure is aligned by the centering structure, thereby ensuring the accuracy of the precision shafting system using the three-point contact positioning structure, and solving the problem that the accuracy of small precision shafting systems of traditional bearings has extremely high requirements on the mechanical accuracy and assembly accuracy of each component. The three-point contact positioning structure and the centering structure can support the main shaft in a smaller volume and with higher precision, effectively reducing the manufacturing difficulty and installation difficulty of the precision shafting system, and improving the accuracy of the precision shafting system.

[0009] Optionally, the three-point contact positioning structure is provided on the outer surface of the upper spherical mover structure to surround the upper spherical mover structure.

[0010] Optionally, the portion of the three-point contact positioning structure surrounding the upper spherical mover structure is provided with an equilateral triangle positioning hole; the three-point contact positioning structure abuts against the upper spherical mover structure through the three sides of the equilateral triangle positioning hole to position the upper spherical mover structure.

[0011] The precision shaft system using a three-point contact positioning structure provided in the present application can improve the accuracy of the precision shaft system. By setting the inner circumference of the three-point contact positioning structure as an equilateral triangle positioning hole, and abutting the three sides of the equilateral triangle positioning hole with the upper spherical mover structure, the upper spherical mover structure is positioned, thereby improving the accuracy of the precision shaft system using a three-point contact positioning structure.

[0012] Optionally, the portion of the three-point contact positioning structure surrounding the upper spherical mover structure is provided with a circular positioning hole, and the inner circumference of the circular positioning hole is evenly provided with three convex keys; the three-point contact positioning structure abuts against the upper spherical mover structure through the three convex keys to position the upper spherical mover structure.

[0013] The precision shafting system using a three-point contact positioning structure provided in the present application can improve the accuracy of the precision shafting system by setting the inner circumference of the three-point contact positioning structure as a circular positioning hole, and abutting the upper spherical mover structure with three convex keys evenly set on the inner circumference of the circular positioning hole to position the upper spherical mover structure, thereby improving the accuracy of the precision shafting system using a three-point contact positioning structure.

[0014] Optionally, a three-point contact positioning structure bracket is provided outside the three-point contact positioning structure;

[0015] The three-point contact positioning structure bracket is used to fix the position of the three-point contact positioning structure.

[0016] Optionally, a shaft sleeve is provided on the outside of the main shaft;

[0017] The shaft sleeve is used to fix the position of the main shaft.

[0018] Optionally, the centering structure includes a spherical groove positioning slider and a voice coil motor; a plurality of voice coil motors are provided, and are evenly arranged along the circumference of the lower spherical mover structure;

[0019] The lower spherical mover structure is connected to the spherical groove positioning slider, and the voice coil motor is used to adjust the position of the spherical groove positioning slider to achieve centering of the main shaft.

[0020] Optionally, the centering structure further includes springs; the number of the springs is equal to the number of the voice coil motors, and the springs and the voice coil motors are arranged one by one on opposite sides of the main shaft and are evenly arranged along the circumference of the lower spherical mover structure;

[0021] The spring is used to assist the spherical groove positioning slider and the voice coil motor in centering.

[0022] Optionally, the centering structure further includes a centering structure bracket;

[0023] The centering structure bracket is used to fix the centering structure.

[0024] Optionally, the spherical groove positioning slider is provided with a spherical groove; the lower spherical mover structure extends into the spherical groove and abuts against the groove surface of the spherical groove;

[0025] The spherical groove is used to align the lower spherical mover structure.

[0026] Beneficial effects: The precision shafting system provided by the present application adopts a three-point contact positioning structure, and positions the upper spherical mover structure through the three-point contact positioning structure, and aligns the lower spherical mover structure through the centering structure, thereby ensuring the accuracy of the precision shafting system adopting the three-point contact positioning structure, and solving the problem that the accuracy of the small precision shafting system of traditional bearings has extremely high requirements on the mechanical accuracy and assembly accuracy of each component. The three-point contact positioning structure and the centering structure can support the main shaft in a smaller volume and with higher precision, effectively reducing the manufacturing difficulty and installation difficulty of the precision shafting system, and improving the accuracy of the precision shafting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a precision shafting system employing a three-point contact positioning structure provided in an embodiment of the present application.

[0028] Figure 2 A structural schematic diagram of a three-point contact positioning structure provided in an embodiment of the present application.

[0029] Figure 3 A structural schematic diagram of another three-point contact positioning structure provided in an embodiment of the present application.

[0030] Figure 4 This is a schematic structural diagram of the spherical groove positioning slider provided in an embodiment of the present application.

[0031] Explanation of reference numbers: 1. Spindle; 2. Three-point contact positioning structure; 3. Self-aligning structure; 4. Upper spherical mover structure; 5. Lower spherical mover structure; 6. Three-point contact positioning structure bracket; 7. Bushing; 8. Spherical groove positioning slider; 9. Voice coil motor; 10. Self-aligning structure bracket. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0034] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 In some embodiments of the present application, a precision shaft system using a three-point contact positioning structure includes a main shaft 1, a three-point contact positioning structure 2, and a centering structure 3. The main shaft 1 is provided with an upper spherical mover structure 4 and a lower spherical mover structure 5. The upper spherical mover structure 4 is connected to the three-point contact positioning structure 2; the lower spherical mover structure 5 is connected to the centering structure 3.

[0035] The three-point contact positioning structure 2 is used to position the upper spherical mover structure 4 by making three-point contact with the upper spherical mover structure 4 along the circumferential direction;

[0036] The centering structure 3 is used to center the lower spherical mover structure 5 to achieve centering of the main shaft 1 .

[0037] In specific applications, the combination of the three-point contact positioning structure 2 and the self-aligning structure 3 effectively addresses the multi-faceted precision issues inherent in conventional small-scale precision shafting systems. The upper spherical mover structure 4 is precisely positioned via the three-point contact positioning structure 2, ensuring its accuracy. The lower spherical mover structure 5 is aligned via the self-aligning structure 3, achieving centering of the spindle 1. This structural design not only improves the mechanical accuracy of the precision shafting but also simplifies its assembly process, reducing the requirements for both the mechanical precision of individual components and the system's assembly accuracy.

[0038] The precision shafting system adopts a three-point contact positioning structure, which positions the upper spherical mover structure through the three-point contact positioning structure and aligns the lower spherical mover structure through the center-aligning structure, thereby ensuring the accuracy of the precision shafting system adopting the three-point contact positioning structure, and solving the problem that the accuracy of small precision shafting systems of traditional bearings has extremely high requirements on the mechanical accuracy and assembly accuracy of each component. The three-point contact positioning structure and the center-aligning structure can support the main shaft in a smaller volume and with higher precision, effectively reducing the manufacturing difficulty and installation difficulty of the precision shafting system, and improving the accuracy of the precision shafting system.

[0039] Specifically, the three-point contact positioning structure 2 is provided on the outer surface of the upper spherical mover structure 4 to surround the upper spherical mover structure 4 .

[0040] In specific applications, the three-point contact positioning structure 2 forms a stable positioning environment by surrounding the outer surface of the upper spherical mover structure 4, ensuring the accuracy of the upper spherical mover structure 4. This design enhances the stability and accuracy of positioning through physical contact and surrounding.

[0041] Specifically, in some optional embodiments, the portion of the three-point contact positioning structure 2 surrounding the upper spherical mover structure 4 is provided with an equilateral triangle positioning hole; the three-point contact positioning structure 2 abuts against the upper spherical mover structure 4 through the three sides of the equilateral triangle positioning hole to position the upper spherical mover structure 4.

[0042] In a specific application, the three-point contact positioning structure 2 surrounds the upper spherical mover structure 4 and forms an equilateral triangle positioning hole (such as Figure 2As shown), the three sides of the equilateral triangle positioning hole are used to abut against the upper spherical mover structure 4 to form three-point contact. Based on the idea that three points determine a plane, the intersection position of the axis of the main shaft 1 and the plane established by the three-point contact of the equilateral triangle positioning hole in the three-point contact positioning structure 2 is determined, thereby achieving precise positioning of the upper spherical mover structure 4. The three-point contact positioning structure 2 is used as the stator and the upper spherical mover structure 4 is used as the rotor, thereby achieving the positioning of the stator to the rotor. At the same time, since there is no installation gap between the three-point contact positioning structure 2 and the upper spherical mover structure 4, the main shaft 1 can maintain extremely high positioning accuracy. Moreover, since the contact surface between the three-point contact positioning structure 2 and the upper spherical mover structure 4 is small, its wear and heat generation is also small, making the precision shafting using the three-point contact positioning structure 2 more reliable.

[0043] The three sides of the equilateral triangle positioning hole may be made of high-strength alloy material to ensure the stability and durability of the three-point contact positioning structure 2 .

[0044] Specifically, in other optional embodiments, the part of the three-point contact positioning structure 2 surrounding the upper spherical mover structure 4 is provided with a circular positioning hole, and the inner circumference of the circular positioning hole is evenly provided with three convex keys; the three-point contact positioning structure 2 abuts against the upper spherical mover structure 4 through the three convex keys to position the upper spherical mover structure 4.

[0045] In specific applications, a circular positioning hole is provided in the part of the three-point contact positioning structure 2 that surrounds the upper spherical mover structure 4, and three convex keys are evenly provided on the inner circumference of the circular positioning hole. These convex keys abut against the upper spherical mover structure 4, thereby realizing precise positioning of the upper spherical mover structure 4. The setting of the three convex keys can ensure the stability and accuracy of the upper spherical mover structure 4 during the positioning process.

[0046] Among them, the convex key can be made of hard material to improve wear resistance and service life. In addition, the shape and size of the convex key can be adjusted according to actual application requirements. For example, it can be designed to be cylindrical, rectangular (such as Figure 3 rectangular (shown) or other geometric shapes to accommodate different positioning needs.

[0047] Specifically, a three-point contact positioning structure bracket 6 is provided outside the three-point contact positioning structure 2;

[0048] The three-point contact positioning structure bracket 6 is used to fix the position of the three-point contact positioning structure 2 .

[0049] In specific applications, the three-point contact positioning structure bracket 6 is provided to ensure the stability and accuracy of the three-point contact positioning structure 2 within the precision shafting system. The three-point contact positioning structure bracket 6 secures the position of the three-point contact positioning structure 2 through mechanical fixing methods such as inlaying or bolts, effectively preventing displacement or offset during operation, thereby ensuring the positioning accuracy of the upper spherical mover structure 4.

[0050] Specifically, a shaft sleeve 7 is provided on the outside of the main shaft 1;

[0051] The shaft sleeve 7 is used to fix the position of the main shaft 1.

[0052] In specific applications, the sleeve 7 can fix the main shaft 1 in various ways. For example, the sleeve 7 can fix the main shaft 1 inside it with fastening bolts, or the main shaft 1 can be tightly embedded in the sleeve 7 by press fitting.

[0053] The shaft sleeve 7 is not only used to fix the position of the main shaft 1, but also can reduce the wear and friction between the main shaft 1 and the bearing seat.

[0054] In some optional embodiments, the inner wall of the sleeve 7 may be provided with a groove, and the outer surface of the main shaft 1 may be provided with a corresponding protrusion. The groove and the protrusion cooperate to achieve the fixation of the main shaft 1. Furthermore, the outside of the sleeve 7 may be provided with a bracket to further enhance the fixing effect of the sleeve 7.

[0055] Specifically, the centering structure 3 includes a spherical groove positioning slider 8 and a voice coil motor 9; a plurality of voice coil motors 9 are provided, and are evenly arranged along the circumference of the lower spherical mover structure 5;

[0056] The lower spherical mover structure 5 is connected to the spherical groove positioning slider 8 , and the voice coil motor 9 is used to adjust the position of the spherical groove positioning slider 8 to achieve centering of the main shaft 1 .

[0057] In specific applications, the voice coil motors 9 are evenly distributed around the circumference of the lower spherical mover structure 5. The thrust output by the voice coil motors 9 adjusts the position of the spherical slot positioning slider 8, driving the spherical slot positioning slider 8 to align the lower spherical mover structure 5. The current value during alignment is recorded. After alignment is complete, the actual current of the voice coil motor 9 is monitored in real time based on this current value, and real-time feedback adjustment is performed to achieve dynamic alignment. The voice coil motors 9 can precisely adjust the position of the lower spherical mover structure 5, thereby achieving dynamic alignment of the spindle 1 and ensuring proper centering of the spindle 1. The opposing voice coil motors 9 are arranged in pairs to achieve bidirectional sliding of the spherical slot positioning slider 8.

[0058] Specifically, in some other optional embodiments, the centering structure 3 further includes springs; the number of the springs and the voice coil motors 9 is equal, and the springs and the voice coil motors 9 are arranged one by one on opposite sides of the main shaft 1 and are evenly arranged along the circumference of the lower spherical mover structure 5;

[0059] The spring is used to assist the spherical groove positioning slider 8 and the voice coil motor 9 in centering.

[0060] In specific applications, half of the voice coil motors 9 are replaced by springs to reduce costs. The springs and the voice coil motors 9 in relative positions form an adjustment group. By obtaining the actual current of the voice coil motors 9 in the adjustment group and performing real-time feedback based on the current value during alignment, the spherical groove positioning slider 8 can be driven to slide in both directions to achieve dynamic alignment of the main shaft 1.

[0061] Specifically, the centering structure 3 further includes a centering structure bracket 10;

[0062] The centering structure bracket 10 is used to fix the centering structure 3 .

[0063] In specific applications, the centering structure bracket 10 is provided to ensure the stability and accuracy of the centering structure 3 within the precision shafting system. The centering structure bracket 10 secures the centering structure in place through mechanical fixing methods such as inlays or bolts, effectively preventing displacement or offset during operation, thereby ensuring the positioning accuracy of the lower spherical mover structure 5.

[0064] Specifically, the spherical groove positioning slider 8 is provided with a spherical groove; the lower spherical mover structure 5 extends into the spherical groove and abuts against the groove surface of the spherical groove;

[0065] The spherical groove is used to align the lower spherical mover structure 5 .

[0066] In specific applications, such as Figure 4 As shown, the spherical groove positioning slider 8 is provided with a spherical groove. The shape of the spherical groove is adapted to the lower spherical mover structure 5. The lower spherical mover structure 5 extends into the spherical groove and abuts against the groove surface of the spherical groove. The spherical groove is used to provide a precise centering surface for the lower spherical mover structure 5. The design of this spherical groove enables the lower spherical mover structure 5 to remain stable during the centering process, thereby achieving centering of the spindle 1. The spherical groove is spherical in shape, and its surface precision must be high to ensure accurate centering. The size and position of the spherical groove need to be precisely designed according to the specific size and centering requirements of the lower spherical mover structure 5.

[0067] From the above, it can be seen that the precision shafting system adopting the three-point contact positioning structure positions the upper spherical mover structure through the three-point contact positioning structure, and aligns the lower spherical mover structure through the self-aligning structure, thereby ensuring the accuracy of the precision shafting system adopting the three-point contact positioning structure, and solving the problem that the accuracy of the small precision shafting system of traditional bearings has extremely high requirements on the mechanical accuracy and assembly accuracy of each component. The three-point contact positioning structure and the self-aligning structure can support the main shaft in a smaller volume and with higher precision, effectively reducing the manufacturing difficulty and installation difficulty of the precision shafting system, and improving the accuracy of the precision shafting system.

[0068] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0069] In addition, the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the purpose of the solution of this embodiment.

[0070] Furthermore, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0071] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0072] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A precision shaft system using a three-point contact positioning structure, characterized in that: It comprises a main shaft (1), a three-point contact positioning structure (2) and a centering structure (3); the main shaft (1) is provided with an upper spherical mover structure (4) and a lower spherical mover structure (5); the upper spherical mover structure (4) is connected to the three-point contact positioning structure (2); the lower spherical mover structure (5) is connected to the centering structure (3); The three-point contact positioning structure (2) is used to position the upper spherical mover structure (4) by making three-point contact with the upper spherical mover structure (4) along the circumferential direction; The centering structure (3) is used to center the lower spherical mover structure (5) to achieve centering of the main shaft (1); The three-point contact positioning structure (2) is arranged on the outer surface of the upper spherical mover structure (4) to surround the upper spherical mover structure (4); The centering structure (3) includes a spherical groove positioning slider (8) and a voice coil motor (9); a plurality of voice coil motors (9) are provided, and are evenly arranged along the circumference of the lower spherical mover structure (5); The lower spherical movable substructure (5) is connected to the spherical groove positioning slider (8), and the voice coil motor (9) is used to adjust the position of the spherical groove positioning slider (8) to achieve centering of the main shaft (1).

2. The precision shafting system with a three-point contact positioning structure according to claim 1 is characterized in that: An equilateral triangle positioning hole is provided in the portion of the three-point contact positioning structure (2) surrounding the upper spherical mover structure (4); the three-point contact positioning structure (2) abuts against the upper spherical mover structure (4) through the three sides of the equilateral triangle positioning hole to position the upper spherical mover structure (4).

3. The precision shafting system with a three-point contact positioning structure according to claim 1 is characterized in that: The portion of the three-point contact positioning structure (2) surrounding the upper spherical mover structure (4) is provided with a circular positioning hole, and the inner circumference of the circular positioning hole is evenly provided with three convex keys; the three-point contact positioning structure (2) abuts against the upper spherical mover structure (4) through the three convex keys to position the upper spherical mover structure (4).

4. The precision shafting system with a three-point contact positioning structure according to claim 1 is characterized in that: A three-point contact positioning structure bracket (6) is provided outside the three-point contact positioning structure (2); The three-point contact positioning structure bracket (6) is used to fix the position of the three-point contact positioning structure (2).

5. The precision shafting system with a three-point contact positioning structure according to claim 4 is characterized in that: A shaft sleeve (7) is provided on the outside of the main shaft (1); The shaft sleeve (7) is used to fix the position of the main shaft (1).

6. The precision shafting system with a three-point contact positioning structure according to claim 1 is characterized in that: The centering structure (3) further includes springs; the number of the springs and the voice coil motors (9) is equal, and the springs and the voice coil motors (9) are arranged one by one on opposite sides of the main shaft (1) and are evenly arranged along the circumference of the lower spherical mover structure (5); The spring is used to assist the spherical groove positioning slider (8) and the voice coil motor (9) in centering.

7. The precision shafting system with a three-point contact positioning structure according to claim 1 or 6, characterized in that: The centering structure (3) further includes a centering structure bracket (10); The centering structure bracket (10) is used to fix the centering structure (3).

8. The precision shafting system with a three-point contact positioning structure according to claim 7 is characterized in that: The spherical groove positioning slider (8) is provided with a spherical groove; the lower spherical mover structure (5) extends into the spherical groove and abuts against the groove surface of the spherical groove; The spherical groove is used to align the lower spherical mover structure (5).

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