A mechanism and operation method for quickly and stably capturing a rotation axis

Abstract

The present invention relates to the technical field of non-metallic material processing and spraying treatment, specifically a mechanism and operating method for quickly and stably capturing a rotation axis, the mechanism including a first positioning block and a second positioning block respectively arranged at the two ends of a workpiece hollow shaft hole, the conical surfaces of a first cone and a second cone respectively abutting against the two ends of the workpiece hollow shaft hole, the first end rod and the second end rod are used for clamping and positioning for repeated use in multiple stations; the pull rod passes through the first center hole, the workpiece hollow shaft hole and the second center hole in sequence, and is used to connect the first positioning block and the second positioning block. The present invention captures the center position of both ends of the workpiece hollow shaft by automatically capturing the center point of the conical surface, ensuring that the rotation axis of the workpiece is stably captured, and obtains its rotation axis by using the positioning end rod, axially tightening the positioning cones at both ends, and the mechanism and the workpiece form a workpiece combination, which can be quickly switched between different processing positions to ensure the consistency and stability of the positioning cone axis and the rotation axis.

Description

Technical Field

[0001] The present invention relates to the technical field of non-metallic material processing and spraying treatment, and in particular to a mechanism and an operating method for quickly and stably capturing a rotation axis. Background Art

[0002] The common existing methods for capturing the axis of a hollow shaft include (1) the method of matching the machine tool chuck with the top cone or positioning the double top cone. The disadvantage is that the operation is cumbersome, especially for non-metallic formed products. This type of non-machined hollow shaft hole workpiece has an irregular axis hole shape and cannot capture the same rotation axis during multi-station operation, resulting in the inability to continue processing and operation. It is not applicable to workpieces that cannot be clamped by the chuck, large workpieces whose rotation radius is limited by the machine tool structure, hollow shafts with too large holes, and hollow shafts with irregular holes. (2) The method of using a pressure block to clamp a solid process shaft at the same time. The disadvantage is that the process shaft itself is heavy, inconvenient to operate, and highly dangerous. In addition, due to the influence of the manufacturing accuracy of the shape and size of the hollow shaft hole, the solid process shaft and the pressure block cannot essentially cooperate well with the hollow shaft, so the axis capture accuracy of the workpiece is poor, affecting subsequent processing.

[0003] Publication No. CN118438219A discloses a centering fixture, a processing machine, and a processing method for a hollow shaft. The key points of the centering technology are as follows: The center rod of the centering fixture is provided with tapered holes at both ends for mating with the machining center. One end of the center rod has a tapered boss for tightening one end of the hollow shaft, and the other end is movably fitted with a tapered plug for tightening the other end of the hollow shaft. This end of the center rod is also provided with a locking mechanism for locking the tapered plug in its sliding motion. That is, the workpiece (hollow shaft) is positioned and mounted on the center rod of the centering fixture via the tapered boss and tapered plug, and the center rod is ultimately positioned by the machining center through the tapered hole. Friction is used to transmit power between the centering fixture and the machining center, or the centering fixture is driven to rotate by a transmission rod provided on the machining center.

[0004] Publication No.: CN217168063U discloses a new double-center mechanism for an external cylindrical grinder. The key points of its related centering technology are: the tops of the two centers in the new double-center mechanism of the external cylindrical grinder are set on the same horizontal line, that is, the rotation axis determined by the two centers is determined by the machine tool outside the workpiece; and the corresponding workpiece should have a center hole for calibrating the rotation axis that meets the processing requirements of a general external cylindrical grinder, that is, the rotation axis of the workpiece has been clearly determined by the two positioning center holes; the rotational power of the workpiece is transmitted by the positioning cylinder required by the patent.

[0005] Publication No.: CN116900867A discloses a quick-change and automatic locking fixture for a horizontal grinding machine. The workpiece has a hole that can be repeatedly and accurately positioned. The workpiece is positioned from the outside by the double center mechanism of the cylindrical grinder, thereby positioning its rotation axis; the rotational power of the workpiece is transmitted by the locking block required by the patent.

[0006] The double centers in the above-mentioned prior art all use mechanisms other than the workpiece, such as grinders and lathes, to ensure their concentricity. When it is necessary to replace different machine tools or convert different process steps, re-clamping and positioning must be performed, that is, the workpiece itself must have precise holes or center holes that can be used for repeated positioning. Otherwise, during repeated positioning, the workpiece will rotate on different rotation axes, that is, the rotation consistency of the workpiece will be lost.

[0007] Therefore, there is an urgent need for a new mechanism and method for capturing the rotation axis to solve the problem of difficulty in capturing the rotation axis of large hollow shaft workpieces and unstable capture of the rotation axis during the replacement process and reprocessing. Summary of the Invention

[0008] In view of this, the present invention aims to propose a mechanism and operating method for quickly and stably capturing the rotation axis, so as to solve the problems of difficulty in capturing the rotation axis of large hollow shaft workpieces, inconsistency of the rotation axis during reprocessing, and unstable axis capture.

[0009] The technical solution of the present invention is achieved as follows:

[0010] The present invention discloses a mechanism for quickly and stably capturing a rotary axis, comprising a first positioning block, a second positioning block, a pull rod, a limiting member and a locking member;

[0011] The first positioning block includes a first cone, a first end rod and a first center hole, the first end rod is arranged at the bottom of the first cone along the axial direction, and the first center hole is arranged through the first cone and the first end rod along the axial direction;

[0012] The second positioning block includes a second cone, a second end rod and a second center hole, the second end rod is arranged at the bottom of the second cone along the axial direction, and the second center hole is arranged through the second cone and the second end rod along the axial direction;

[0013] The first positioning block and the second positioning block are respectively arranged at the two ends of the hollow shaft hole of the workpiece, and the conical surfaces of the first cone and the second cone are respectively abutted against the two ends of the hollow shaft hole of the workpiece, and the first end rod and the second end rod are used for clamping and positioning for repeated use in multiple stations;

[0014] The pull rod passes through the first center hole, the hollow shaft hole of the workpiece and the second center hole in sequence, and is used to connect the first positioning block and the second positioning block;

[0015] The limiting member is connected to one end of the pull rod adjacent to the first positioning block, and is used to limit the relative displacement between the pull rod and the first positioning block;

[0016] The locking member is connected to one end of the pull rod adjacent to the second positioning block, and is used to limit the relative displacement of the pull rod and the second positioning block.

[0017] Furthermore, both ends of the hollow shaft hole of the workpiece are one of a curved surface mouth shape, a chamfered mouth shape, a right-angle mouth shape or an irregular mouth shape.

[0018] Furthermore, the first end rod and the second end rod are cylindrical.

[0019] Furthermore, threads are provided at both ends of the pull rod for respectively screwing the locking member and the limiting member.

[0020] Furthermore, the limiting member is a nut.

[0021] Furthermore, the locking member is a locking nut.

[0022] Furthermore, it also includes a driving device and a driving connecting seat, the driving device is arranged on the driving connecting seat, a driving structure is arranged between the driving device and the first positioning block, and the driving device is used to drive the workpiece to rotate.

[0023] Furthermore, the driving structure is one of the connection transmission structures such as rectangular block connection, key connection, coupling connection, clamp connection, flange connection, heart chuck connection, and bolt connection.

[0024] Another object of the present invention is to disclose a method for operating a mechanism for rapidly and stably capturing a rotation axis, which is used to manufacture any of the aforementioned mechanisms for rapidly and stably capturing a rotation axis, and comprises the following specific steps:

[0025] S1: Pass the pull rod through the first center hole of the first positioning block, screw it into the limiter, and keep one end of the pull rod screwed into the limiter tightly against the first end rod;

[0026] S2: inserting the pull rod into the hollow shaft hole of the workpiece so that the first cone abuts against the end of the hollow shaft hole, and the other end of the pull rod extends out of the hollow shaft hole of the workpiece;

[0027] S3: directing the second cone of the second positioning block toward the hollow shaft hole, inserting the pull rod through the second center hole of the second positioning block, causing the second cone to abut against the end of the hollow shaft hole, and screwing in the locking member;

[0028] S4: While shaking the first positioning block and the second positioning block, gradually tighten the locking member until the locking member is tightened to form a workpiece combination.

[0029] Furthermore, in step S4, the common axis of the first end rod and the second end rod serves as the centering support axis of the workpiece combination.

[0030] Compared with the prior art, the mechanism and operation method for quickly and stably capturing a rotary axis of the present invention have the following advantages:

[0031] 1. The present invention captures the center positions of both ends of the workpiece hollow shaft by automatically capturing the center point through the conical surface, obtains its rotation axis by using the positioning end rod, axially tightens the positioning cones at both ends, so that the mechanism and the workpiece form a workpiece combination, ensuring that the rotation axis of the workpiece combination is reliably, stably and continuously captured, and can quickly switch between different processing positions, repeatedly clamp or support, to ensure the consistency and stability of the end rod, the positioning cone axis and the rotation axis.

[0032] 2. The axis capture structure of the present invention is light, easy to operate, highly safe, has good interchangeability, high versatility, good stability, and is easy to manufacture in batches at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 It is a schematic diagram of the structure of the mechanism of the present invention;

[0035] Figure 2 This is a schematic structural diagram of the first positioning block of the present invention;

[0036] Figure 3 This is a schematic structural diagram of the second positioning block of the present invention;

[0037] Figure 4 Schematic diagram of the pull rod structure of the present invention;

[0038] Figure 5 This is a schematic diagram of the first positioning block and pull rod structure of the present invention;

[0039] Figure 6 This is a schematic diagram of the positioning support structure of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of the drive connector of the present invention;

[0041] Figure 8 Schematic diagram of the structure of the belt drive device of the present invention;

[0042] Figure 9 Schematic diagram of the support structure of the present invention.

[0043] 1. First positioning block; 101. First cone; 102. First end rod; 103. First center hole; 104. Protrusion; 2. Second positioning block; 201. Second cone; 202. Second end rod; 203. Second center hole; 3. Pull rod; 301. End thread; 4. Limiting member; 5. Locking member; 6. Driving device; 7. Driving structure; 8. Driving connecting seat; 9. Centering support seat; 10. Bracket. DETAILED DESCRIPTION

[0044] In order to make the technical means, objectives and effects of the present invention easier to understand, embodiments of the present invention are described in detail below with reference to specific figures.

[0045] It should be noted that all terms used in the present invention to indicate direction and position, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between various components in a specific state. They are only for the convenience of describing the present invention, and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0046] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0047] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] The first object of the present invention is to disclose a mechanism for quickly and stably capturing a rotation axis, comprising a first positioning block 1, a second positioning block 2, a pull rod 3, a limiting member 4 and a locking member 5;

[0049] The first positioning block 1 includes a first cone 101, a first end rod 102, a first center hole 103 and a protrusion 104. The first end rod 102 is arranged at the bottom of the first cone 101 along the axial direction. The protrusion 104 is arranged on the side of the first end rod 102 away from the first cone 101. The first center hole 103 is arranged along the axial direction through the first cone 101 and the first end rod 102.

[0050] The second positioning block 2 includes a second cone 201, a second end rod 202 and a second center hole 203. The second end rod 202 is arranged at the bottom of the second cone 201 along the axial direction. The second center hole 203 is arranged through the second cone 201 and the second end rod 202 along the axial direction.

[0051] The first positioning block 1 and the second positioning block 2 are respectively arranged at the two ends of the hollow shaft hole of the workpiece. The conical surfaces of the first cone 101 and the second cone 201 are respectively in contact with the two ends of the hollow shaft hole of the workpiece. The first end rod 102 and the second end rod 202 are used for clamping and positioning for repeated use in multiple stations.

[0052] The pull rod 3 passes through the first center hole 103, the workpiece hollow shaft hole and the second center hole 203 in sequence, and is used to connect the first positioning block 1 and the second positioning block 2;

[0053] The limiting member 4 is connected to the end of the pull rod 3 adjacent to the first positioning block 1, and is used to limit the relative displacement between the pull rod 3 and the first positioning block 1;

[0054] The locking member 5 is connected to one end of the pull rod 3 adjacent to the second positioning block 2 and is used to limit the relative displacement between the pull rod 3 and the second positioning block 2 .

[0055] The conical surfaces of the first cone 101 and the second cone 201 fit tightly with the two ends of the hollow shaft hole of the workpiece respectively, and under the action of the axial tension provided by the pull rod 3, automatic centering can be achieved to ensure that the rotation axis of the workpiece is reliably captured; the first end rod 102 and the second end rod 202 provide additional support points to ensure that the workpiece can be centrifuged during processing without the need for a center hole; the pull rod 3 passes through the first center hole 103, the hollow shaft hole of the workpiece and the second center hole 203 in turn, and is fixed by the limit member 4 and the locking member 5, so that the mechanism and the workpiece form a workpiece combination, which simplifies the installation steps and maintains the relative stability of the workpiece combination, making it convenient for the workpiece combination to be centered and rotated, or supported and placed in different working positions in a single combined state, thereby improving work efficiency; the first end rod 102 and the second end rod 202 serve as a clamping and positioning structure that can be reused in multiple stations, so that the workpiece can be quickly transferred between different processing or placement positions, ensuring the consistency of the rotation axis of the workpiece and adapting to various processing requirements.

[0056] This setting captures the center positions of both ends of the workpiece hollow shaft by automatically capturing the center point through the conical surface, and obtains its rotation axis by using the positioning end rod; by axially tightening the positioning cones at both ends, the consistency and stability of the positioning cone axis and the rotation axis are guaranteed; since only axial tightening force needs to be provided for the positioning cones at both ends, and since no center hole, center hole or tapered hole positioning is required, there is no need for a special machine tool to provide a centering center, which simplifies the corresponding positioning requirements of the workpiece combination for the machine tool, that is, there is no need to prepare a center hole, which solves the problem that large hollow structures of workpieces cannot be positioned by center holes or cannot be clamped by chucks. The axis capture structure has the advantages of being light, easy to operate, highly safe, interchangeable, stable, versatile, easy to use, low cost, and easy to mass produce.

[0057] Specifically, both ends of the hollow shaft hole of the workpiece may be of a curved surface shape, a chamfered shape, a right-angle shape, or an irregular shape.

[0058] The conical surfaces of the first cone 101 and the second cone 201 fit well with various mouth shapes, and can obtain reliable positioning and centering effects. Even if there are manufacturing modeling errors, they can automatically adjust to the optimal stable position. The first end rod and the second end rod can provide a workpiece combination, which is also the centering axis of the workpiece, and can achieve stable automatic centering. Through the tightening action of the pull rod, each cone surface is in a stable combination state with the workpiece.

[0059] Preferably, the first cone 101 and the second cone 201 have appropriate cone angles to ensure that the contact surfaces of the two cones with the hollow shaft are both on the cone surfaces after the pull rod is tightened, thereby ensuring the reliability of centering.

[0060] Preferably, the cross-sectional shapes of the first cone 101 and the second cone 201 are the same.

[0061] The same cross-sectional shape ensures the structural symmetry between the first cone 101 and the second cone 201, making the mechanism interchangeable in installation, and can also simplify the manufacturing process, facilitate mass production and quality control, and reduce production costs.

[0062] Specifically, the first end rod 102 and the second end rod 202 are cylindrical.

[0063] Compared with end rods of other shapes, cylindrical end rods are easier to clamp and support in a centralized manner, ensuring the consistency of their axis with the rotation axis of the workpiece, thereby improving the positioning stability of the entire system. The cylindrical end rod serves as a clamping and positioning structure that can be reused in multiple stations, allowing the workpiece to be quickly switched between different processing positions to adapt to various processing and support requirements.

[0064] Specifically, the protrusion 104 is arranged on the side of the first end rod 102 away from the first cone 101, and the surrounding surfaces of the protrusion 104 protrude from the cylindrical surface of the first end rod 102 itself. The center line of the protrusion 104 is coaxial with the center line of the first end rod 102, and the protrusion 104 is used to form the driving structure 7.

[0065] Preferably, the bump 104 is a square structure.

[0066] Specifically, threads are provided at both ends of the pull rod 3 for respectively threadedly connecting with the limiting member 4 and the locking member 5 .

[0067] By providing threads at both ends of the pull rod 3 and threading the limiter 4 and locking member 5, the relative displacement between the first and second positioning blocks 1 and 2 and the pull rod 3 can be effectively limited, ensuring the positioning reliability and stability of the entire system. Tightening the limiter 4 and locking member 5 applies a uniform pulling force to the first and second cones 101, 201, forcing them to fit closely to the ends of the workpiece's hollow shaft hole, achieving automatic centering. Once adjusted into position, the position is fixed by tightening the limiter 4 and locking member 5, preventing loosening and ensuring stable centering. The threaded connection also allows for easy installation and removal of the limiter 4 and locking member 5.

[0068] The pull rod 3 is used to tighten the first cone 101 and the second cone 201. The overall structure is light in weight, easy to operate, and the operation process is simplified, which improves work efficiency. It is particularly suitable for application scenarios where large workpieces are clamped at one time and work stations and processes are frequently changed, thereby improving work efficiency.

[0069] The firm clamping force provided by the threaded connection ensures the stability of the workpiece during processing, reduces the risk of displacement due to vibration, impact or loosening, and thus improves the reliability and stability of the rotary axis capture. Its structure is simple and easy to understand, which facilitates daily inspection and maintenance. If a component is damaged or worn, only the corresponding nut or bolt needs to be replaced, without the need for overall replacement, which reduces maintenance costs.

[0070] Specifically, the limiting member 4 is a nut.

[0071] Specifically, the locking member 5 is a locking nut.

[0072] The locking nut can be easily installed and removed manually, which simplifies the operation process and improves work efficiency.

[0073] When the workpiece needs to be rotated for processing, the driving structure 7 drives the first end rod 102 and the first cone 101, and drives the workpiece to rotate synchronously.

[0074] Specifically, it also includes a driving device 6 and a driving connecting seat 8. The driving device 6 is arranged on the driving connecting seat 8. A driving structure 7 is provided between the driving device 6 and the first positioning block 1. The driving device 6 is used to drive the workpiece to rotate.

[0075] Drive device 6 is connected to drive structure 7 and supported for rotation by drive connector 8. Rotational power input from drive device 6 is transmitted to first positioning block 1 via drive structure 7, thereby driving the workpiece to rotate. The cooperation between drive structure 7 and first positioning block 1 ensures that the workpiece rotates synchronously with drive device 6, and the speed and angle of rotation of the workpiece can be controlled by drive device 6.

[0076] The arrangement of the driving structure 7 and the first positioning block 1 for cooperation reduces cooperation requirements and ensures the installation efficiency of the workpiece joint.

[0077] Specifically, the drive structure 7 can also be one of the connection transmission structures such as key connection, coupling connection, clamp connection, flange connection, heart-shaped chuck connection, and bolt connection. Like the rectangular block connection method, it can be easily adapted to different drive requirements.

[0078] When the driving structure 7 adopts a different type of connection mode, the protrusion 104 needs to be replaced with a corresponding structural form to meet the requirements of the transmission.

[0079] This setting designs the drive structure 7 into different types of connection methods, such as rectangular block connection, key connection, coupling connection, clamp connection, flange connection, heart-shaped chuck connection, bolt connection, etc. The specific selection should be determined according to actual processing requirements and application scenarios to ensure the best processing effect and system performance.

[0080] Preferably, the upper protrusion 104 of the first end rod 102 and the driving device 6 are connected to the square groove corresponding to the protrusion 104, and the protrusion 104 and the square groove form the driving structure 7, and the protrusion 104 and the square groove cooperate to form a rectangular block connection.

[0081] The protrusion 104 provides a larger contact area, which facilitates the rapid combination of the workpiece assembly and the drive structure 7 and ensures the effective transmission of the rotational power. In addition, the rectangular block has a simple geometric shape, low matching requirements, and low manufacturing cost.

[0082] Specifically, the second end rod 202 is placed in the V-groove of the centering support seat 9 to support the workpiece combination.

[0083] The V-shaped groove cooperates with the second end rod 202 to maintain the consistency and stability of its rotation axis, effectively providing centering support for the second end rod 202, simplifying the installation and disassembly process, and improving work efficiency.

[0084] Specifically, the two side walls of the V-shaped groove of the centering support seat 9 can be two arcs or curved surfaces or the supporting surfaces of a rotatable bearing.

[0085] Specifically, it also includes a bracket 10 for storing the workpiece complex, inspecting, spraying, and repairing the workpiece. The first end rod 102 and the second end rod 202 are respectively placed on the horizontal support rods of the two brackets 10.

[0086] The bracket 10 can conveniently store the workpiece combination, avoid contamination and damage to the workpiece surface, and facilitate the workpiece rotation inspection, surface repair, and drying.

[0087] Preferably, a V-shaped groove is provided on the bracket 10 , and the first end rod 102 and the second end rod 202 are respectively placed in the V-shaped grooves of the two brackets 10 .

[0088] The V-shaped groove provided on the bracket 10 can prevent the workpiece from being separated from the bracket 10. At the same time, the workpiece can be rotated on the bracket 10, which is convenient for the workpiece rotation inspection, surface repair, and drying.

[0089] Another object of the present invention is to disclose a method for operating a mechanism for quickly and stably capturing a rotation axis, comprising the following specific steps:

[0090] S1: Pass the pull rod 3 through the first center hole 103 of the first positioning block 1, screw it into the stopper 4 and keep the end of the pull rod 3 screwed into the stopper 4 tightly against the first end rod 102;

[0091] S2: Insert the pull rod 3 into the hollow shaft hole of the workpiece so that the first cone 101 abuts against the end of the hollow shaft hole, and the other end of the pull rod 3 extends out of the hollow shaft hole of the workpiece;

[0092] S3: Make the second cone 201 of the second positioning block 2 point to the hollow shaft hole, insert the pull rod 3 through the second center hole 203 of the second positioning block 2, make the second cone 201 abut against the end of the hollow shaft hole, and screw in the locking member 5;

[0093] S4: While shaking the first positioning block 1 and the second positioning block 2, gradually tighten the locking member 5 until the locking member 5 is tightened to form a workpiece combination.

[0094] By gradually tightening the locking member 5 while simultaneously shaking the first and second positioning blocks 1 and 2, it is possible to ensure that the first and second cones 101 and 201 securely and tightly fit the ends of the workpiece's hollow shaft hole. After the locking member 5 is finally tightened, the entire system forms a stable workpiece joint, ensuring that the axes of the cylindrical positioning end rods of the first and second positioning blocks 1 and 2 together form the axis of rotation of the workpiece joint.

[0095] Compared with the complex method of achieving rotational centering by cooperating with machine tools and fixtures, this method of tightening the positioning block through internal connection to stably capture the rotation axis simplifies the requirements for external conditions, while also reducing the structural weight, facilitating operation difficulty, and reducing manufacturing costs.

[0096] Specifically, in step S4, the common axis of the first end rod 102 and the second end rod 202 is the centering support axis of the workpiece combination.

[0097] The common axis of the first end rod 102 and the second end rod 202 serves as the centering support axis, ensuring that the rotation axis of the workpiece combination during the processing is stable and certain, with good consistency, reducing the influence of system errors, ensuring consistent support effects during each installation, and improving the consistency and repeatability of processing. At the same time, the common axis design can be seamlessly connected with automated equipment such as robots and conveyor belts, further improving production efficiency.

[0098] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanism for quickly and stably capturing a rotation axis, characterized in that: It comprises a first positioning block (1), a second positioning block (2), a pull rod (3), a limiting member (4) and a locking member (5); The first positioning block (1) comprises a first cone (101), a first end rod (102) and a first center hole (103); the first end rod (102) is arranged at the bottom of the first cone (101) along the axial direction; and the first center hole (103) is arranged through the first cone (101) and the first end rod (102) along the axial direction; The second positioning block (2) comprises a second cone (201), a second end rod (202) and a second center hole (203); the second end rod (202) is arranged at the bottom of the second cone (201) along the axial direction; and the second center hole (203) is arranged through the second cone (201) and the second end rod (202) along the axial direction; The first positioning block (1) and the second positioning block (2) are respectively arranged at the two ends of the hollow shaft hole of the workpiece, the conical surfaces of the first cone (101) and the second cone (201) are respectively in contact with the two ends of the hollow shaft hole of the workpiece, and the first end rod (102) and the second end rod (202) are used for clamping and positioning for repeated use in multiple stations; The pull rod (3) passes through the first center hole (103), the hollow shaft hole of the workpiece and the second center hole (203) in sequence, and is used to connect the first positioning block (1) and the second positioning block (2); The limiting member (4) is connected to one end of the pull rod (3) adjacent to the first positioning block (1) and is used to limit the relative displacement of the pull rod (3) and the first positioning block (1); The locking member (5) is connected to one end of the pull rod (3) adjacent to the second positioning block (2) and is used to limit the relative displacement of the pull rod (3) and the second positioning block (2).

2. The mechanism for rapidly and stably capturing the rotation axis according to claim 1, characterized in that: Both ends of the hollow shaft hole of the workpiece are one of curved surface mouth shape, chamfered mouth shape, right angle mouth shape or irregular mouth shape.

3. The mechanism for rapidly and stably capturing the rotation axis according to claim 1, characterized in that: The first end rod (102) and the second end rod (202) are cylindrical.

4. The mechanism for rapidly and stably capturing a rotation axis according to claim 1, characterized in that: Both ends of the pull rod (3) are provided with threads for respectively screwing the limiting member (4) and the locking member (5).

5. The mechanism for rapidly and stably capturing a rotation axis according to claim 1, characterized in that: The limiting member (4) is a nut.

6. The mechanism for rapidly and stably capturing a rotation axis according to claim 1, characterized in that: The locking member (5) is a locking nut.

7. The mechanism for rapidly and stably capturing a rotation axis according to claim 1, characterized in that: It also includes a driving device (6) and a driving connection seat (8), wherein the driving device (6) is arranged on the driving connection seat (8), a driving structure (7) is arranged between the driving device (6) and the first positioning block (1), and the driving device (6) is used to drive the workpiece to rotate.

8. The mechanism for rapidly and stably capturing the rotation axis according to claim 7, characterized in that: The driving structure (7) is one of the connection transmission structures such as a rectangular block connection mode, a key connection mode, a coupling connection mode, a clamp connection mode, a flange connection mode, a heart-shaped chuck connection mode, and a bolt connection mode.

9. A method for operating a mechanism for quickly and stably capturing a rotary axis, characterized in that: The method for manufacturing a mechanism for rapidly and stably capturing a rotary axis according to any one of claims 1 to 8 comprises the following specific steps: S1: Pass the pull rod (3) through the first center hole (103) of the first positioning block (1), screw it into the limiting member (4), and keep one end of the pull rod (3) screwed into the limiting member (4) tightly against the first end rod (102); S2: inserting the pull rod (3) into the hollow shaft hole of the workpiece, so that the first cone (101) abuts against the end of the hollow shaft hole, and the other end of the pull rod (3) extends out of the hollow shaft hole of the workpiece; S3: directing the second cone (201) of the second positioning block (2) toward the hollow shaft hole, passing the pull rod (3) through the second center hole (203) of the second positioning block (2), causing the second cone (201) to abut against the end of the hollow shaft hole, and screwing in the locking member (5); S4: While shaking the first positioning block (1) and the second positioning block (2), gradually tighten the locking member (5) until the locking member (5) is tightened to form a workpiece combination.

10. The method for operating a mechanism for rapidly and stably capturing a rotary axis according to claim 9, characterized in that: In step S4, the common axis of the first end rod (102) and the second end rod (202) is the centering support axis of the workpiece combination.

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