Mechanism for rapidly and stably capturing rotation axis and operation method

Abstract

The invention relates to the technical field of non-metallic material machining and spraying treatment, in particular to a mechanism for rapidly and stably capturing a rotation axis and an operation method.The mechanism comprises a first positioning block and a second positioning block which are arranged at the two ends of a hollow shaft hole of a workpiece correspondingly; the conical surface of the first cone and the conical surface of the second cone abut against the two ends of a workpiece hollow shaft hole correspondingly, and the first end rod and the second end rod are used for clamping and positioning for multi-station repeated use; the pull rod sequentially penetrates through the first center hole, the workpiece hollow shaft hole and the second center hole and is used for connecting the first positioning block and the second positioning block. The center positions of the two ends of the hollow shaft of the workpiece are captured in the mode that the center point is automatically captured through the conical surface, it is ensured that the rotation axis of the workpiece is stably captured, the rotation axis of the workpiece is obtained through the positioning end rod, the positioning cones at the two ends are axially tensioned, the mechanism and the workpiece form a workpiece combination, and rapid switching between different machining positions can be achieved; and consistency and stability of the axis of the positioning cone and the rotation axis are guaranteed.

Description

Technical Field

[0001] The 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 rotary axis. Background Art

[0002] The existing common methods for capturing the axis of a hollow shaft include (1) a method of matching a machine tool chuck with a top cone or positioning a 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 cannot capture the same rotation axis during multi-station operation due to its irregular axis hole shape, resulting in the inability to continue processing and operation. It is not suitable for 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 and their holes with irregular shapes. (2) A method of preparing a solid process shaft and using a pressure block to clamp it. 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 tool and a processing method for a hollow shaft, and the key points of the centering technology are: the two ends of the center rod of the centering fixture are provided with tapered holes for cooperating with the top of the processing machine tool, and one end of the center rod has a tapered boss for tightening one end of the hollow shaft, and the other end is movably sleeved with a tapered plug for tightening the other end of the hollow shaft, and this end of the center rod is provided with a locking mechanism for locking the sliding of the tapered plug. That is, the workpiece (hollow shaft) is positioned and installed on the center rod of the centering fixture through the tapered boss and the tapered plug, and the center rod is finally positioned by the top of the processing machine tool through the tapered hole. The centering fixture and the top of the machine tool are driven by friction, or the centering fixture is driven to rotate by a transmission rod set on the top of the machine tool.

[0004] Publication No.: CN217168063U discloses a new double-center mechanism for an external cylindrical grinder, and the key points of its related centering technology are: the tops of the two centers in the new double-center mechanism for an external cylindrical grinder are arranged 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 in the patent requirements.

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

[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 in this way:

[0010] The 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 comprises 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 comprises 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 two ends of the hollow shaft hole of the workpiece, the conical surfaces of the first cone and the second cone are respectively abutted against 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 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;

[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 shape, a chamfered shape, a right angle shape or an irregular 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 threading the locking member and the limiting member.

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

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

[0022] Furthermore, it also includes a driving device and a driving connection seat, the driving device is arranged on the driving connection 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-shaped chuck connection, bolt connection and the like.

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

[0025] S1: passing the pull rod through the first center hole of the first positioning block, screwing it into the limiter, and keeping 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, making the first cone abut against the end of the hollow shaft hole, and making the other end of the pull rod extend out of the hollow shaft hole of the workpiece;

[0027] S3: Make the second cone of the second positioning block point to the hollow shaft hole, pass the pull rod through the second center hole of the second positioning block, make the second cone abut against the end of the hollow shaft hole, and screw in the locking piece;

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

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

[0031] 1. The present invention captures the center positions of both ends of the hollow shaft of the workpiece 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 constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

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

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

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

[0037] Figure 4 It is a 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 the 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 It is a schematic diagram of the structure of the belt drive device of the present invention;

[0042] Fig. 9 It is a 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 easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0045] It should be noted that all the terms used in the present invention to indicate directionality and position, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used 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 clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0048] The first object of the present invention is to disclose a mechanism for quickly and stably capturing a rotary 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 comprises 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 at a side of the first end rod 102 away from the first cone 101. The first center hole 103 is arranged through the first cone 101 and the first end rod 102 along the axial direction.

[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 abutted against 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;

[0052] 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;

[0053] 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 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 are used as clamping and positioning structures 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 the axial tightening force of the positioning cones at both ends needs to be provided, and since no center hole, center hole or conical 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 relying on center holes or cannot be clamped by chucks. The axis capture structure has the advantages of being light, easy to operate, highly safe, good interchangeability, good stability, high versatility, easy to use, low cost, and easy to mass produce.

[0057] Specifically, both ends of the hollow shaft hole of the workpiece may be 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 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 state 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 center, clamp and support, ensuring the consistency of their axis and 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 meet a variety of 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, 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 protrusion 104 is a square structure.

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

[0067] By providing threads at both ends of the pull rod 3 and screwing the limiter 4 and the locking member 5, the relative displacement between the first positioning block 1 and the second positioning block 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 the locking member 5 can apply uniform tension to the first cone 101 and the second cone 201, so that the first cone 101 and the second cone 201 are closely fitted to the two ends of the hollow shaft hole of the workpiece, and automatic centering is achieved. After adjustment, the position is fixed by tightening the limiter 4 and the locking member 5 to prevent loosening and ensure stable centering. At the same time, the threaded connection allows the limiter 4 and the locking member 5 to be easily installed and disassembled.

[0068] By using the pull rod 3 to tighten the first cone 101 and the second cone 201, the overall structure is light in weight, easy to operate, and has a simplified operating process, which improves work efficiency. It is particularly suitable for application scenarios where large workpieces are clamped once and workstations 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 and reduces the risk of displacement due to vibration, impact or loosening, thereby improving the reliability and stability of the capture of the rotary axis. 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 replacing the entire component, 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 disassembled manually, which simplifies the operation process and improves work efficiency.

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

[0074] Specifically, it also includes a driving device 6 and a driving connection seat 8. 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. The driving device 6 is used to drive the workpiece to rotate.

[0075] The driving device 6 is connected to the driving structure 7, and the driving connection seat 8 provides rotation support. The rotational power input by the driving device 6 is transmitted to the first positioning block 1 through the driving structure 7, thereby driving the workpiece to rotate. The cooperation between the driving structure 7 and the first positioning block 1 ensures that the workpiece can rotate synchronously with the driving device 6, and the speed and rotation angle of the workpiece can be controlled by the driving device 6.

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

[0077] Specifically, the driving 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, bolt connection, etc., which can be easily adapted to different driving requirements like the rectangular protrusion connection.

[0078] When the driving structure 7 is of a different type of connection mode, the protrusion 104 needs to be replaced with a corresponding structure to meet the requirements of the matching 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 a driving structure 7, and the protrusion 104 cooperates with the square groove 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 driving 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-shaped 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 provide centering support for the second end rod 202, simplify the installation and disassembly process, and improve 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 support 10 can conveniently store the workpiece combination, prevent the workpiece surface from being contaminated and damaged, 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 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 rotating inspection, surface repair, and drying of the workpiece.

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

[0090] S1: Pass the pull rod 3 through the first central hole 103 of the first positioning block 1, screw it into the stopper 4 and keep one 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, make the first cone 101 abut against the end of the hollow shaft hole, and make the other end of the pull rod 3 extend 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, pass 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 shaking the first positioning block 1 and the second positioning block 2 while gradually tightening the locking member 5, it is possible to ensure that the first cone 101 and the second cone 201 are reliably and tightly fitted to the two ends of the hollow shaft hole of the workpiece. After finally tightening the locking member 5, the entire system forms a stable workpiece joint body, and ensures that the axes of the cylindrical positioning end rods of the first positioning block 1 and the second positioning block 2 jointly constitute the rotation axis of the workpiece joint body.

[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 weight of the structure, 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 a centering support axis, ensuring that the rotation axis of the workpiece combination during the processing is stable and determined with good consistency, reducing the influence of system errors, ensuring consistent support effects each time installed, and improving processing consistency and repeatability. 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 substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope 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 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 abutted against 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 between 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 between 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 the rotation axis according to claim 1, characterized in that: Both ends of the pull rod (3) are provided with threads for respectively threading the limiting member (4) and the locking member (5).

5. The mechanism for rapidly and stably capturing the 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 piece (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 comprises 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 method, a key connection method, a coupling connection method, a clamp connection method, a flange connection method, a heart-shaped chuck connection method, a bolt connection method, etc.

9. A method for operating a mechanism for quickly and stably capturing a rotary axis, characterized in that: The mechanism for manufacturing the fast and stable capture of the rotary axis as described in 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: Make the second cone (201) of the second positioning block (2) point to the hollow shaft hole, pass 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); 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 the mechanism for rapidly and stably capturing the rotation 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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