Multi-point supporting type center frame
By introducing a multi-point support structure into the multi-point support center frame, the problem of uneven support force is solved, enabling stable clamping and high-precision machining of shafts, and improving machining quality and the durability of the grippers.
Patent Information
- Application Number
- CN202423106898.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-16
AI Technical Summary
Existing multi-point support center supports suffer from uneven support force when machining long or heavy shafts, leading to shaft vibration and machining errors, which affect machining accuracy and quality.
A multi-point support center frame is designed, which uses first and second grippers with limiting components that have multiple rotational support points, and a third limiting component to form multi-point support. The grippers are opened or closed by a motor to achieve uniform support for the shaft.
It improves the support stability and machining accuracy of shaft components, reduces vibration and jaw wear, extends the service life of jaws, and ensures machining quality.
Smart Images
Figure CN223572508U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lathe accessory technical field, especially a kind of multi-point support type center stand. BACKGROUND
[0002] In the field of machining, multi-point support type center stand as an important auxiliary device, is widely used in the machining process of slender shaft parts. The traditional multi-point support type center stand design is clamped to shaft by two clamping jaws. To realize the effective support and positioning of shaft, to ensure the stability and accuracy of the machining process.
[0003] But the support effect of existing multi-point support type center stand to shaft is limited, especially when machining longer or heavier shaft, cause shaft uneven stress, especially in the machining process, shaft is subjected to cutting force, single-point clamping often cannot provide enough stability and stiffness, easily lead to shaft vibration and error, and further affect machining precision and workpiece quality. SUMMARY
[0004] The utility model aims at providing a kind of multi-point support type center stand, to solve the uneven problem of the support force of prior art multi-point support type center stand to shaft.
[0005] The technical scheme of the utility model is: a kind of multi-point support type center stand, comprising: frame body, first clamping jaw and second clamping jaw, the first clamping jaw movably connected with first limiting component, the first limiting component has at least two rotation support points, the second clamping jaw movably connected with second limiting component, the second limiting component has at least two rotation support points, the frame body movably connected with third limiting component, the first clamping jaw and the second clamping jaw are rotatably connected on the frame body on the two sides of the third limiting component, the first limiting component, second limiting component cooperate the third limiting component for the multi-point support of shaft.
[0006] Preferably, the first limiting component is rotatably connected to the first clamping jaw towards the second clamping jaw side, the second limiting component is rotatably connected to the second clamping jaw towards the first clamping jaw side, the rotation support point of the first limiting component is oppositely arranged with the rotation support point of the second limiting component.
[0007] Preferably, the third limiting component has at least two rotation support points, the third limiting component, first limiting component and second limiting component are distributed in planar triangular structure.
[0008] Preferably, the first limiting component comprises a first limiting piece and a plurality of first rollers, the first limiting piece is rotationally connected to the free end of the first clamping jaw, the plurality of first rollers are rotationally connected to the first limiting piece in a circular arc distribution, and the rotation central axes of the plurality of first rollers are arranged in parallel; the second limiting component comprises a second limiting piece and a plurality of second rollers, the second limiting piece is rotationally connected to the free end of the second clamping jaw, the plurality of second rollers are rotationally connected to the second limiting piece in a circular arc distribution, and the rotation central axes of the plurality of second rollers are arranged in parallel with the rotation central axes of the first rollers.
[0009] Preferably, when the first roller and the second roller limit the shaft piece, the rotation central axes of the first roller and the second roller are on the same circular track.
[0010] Preferably, the third limiting component is rotationally connected with a plurality of third rollers, and the plurality of third rollers are distributed in a circular arc shape to support the shaft piece from the lateral outer circumferential side.
[0011] Preferably, the frame body is fixedly provided with a motor, the motor is in transmission connection with the third limiting component, and the third limiting component is translated relative to the frame body to adapt to shaft pieces of different sizes.
[0012] Preferably, the first roller is two, the second roller is two, and the third roller is two.
[0013] Preferably, the maximum opening angle of the first clamping jaw and the second clamping jaw is an obtuse angle, and the first clamping jaw and the second clamping jaw are curved towards opposite directions.
[0014] Compared with the prior art, the utility model has the advantages that:
[0015] (1) The first limiting component and the second limiting component each have at least two rotation support points, effectively dispersing the cutting force and vibration received by the shaft piece, thereby improving the overall support stability of the multi-point support type center frame when clamping the shaft piece, helping to reduce vibration and error in the machining process, and ensuring the stability and accuracy of the shaft piece in the machining process.
[0016] (2) The clamping jaw can form multi-point contact with the shaft piece when clamping the shaft piece, thereby optimizing the stress distribution of the shaft piece. This multi-point contact mode helps to reduce the clamping jaw wear and damage to the surface of the shaft piece caused by excessive stress on a single point, prolongs the service life of the clamping jaw, and improves the machining quality. BRIEF DESCRIPTION OF DRAWINGS
[0017] The utility model will be further described in connection with the drawings and examples as follows:
[0018] Figure 1The utility model discloses a kind of structure schematic diagram of multi-point support type center frame of the utility model.
[0019] Figure 2 The utility model discloses a kind of front view of multi-point support type center frame of the utility model.
[0020] Figure 3 The utility model discloses the position relation schematic diagram of first limiting component, second limiting component and third limiting component of the utility model.
[0021] Mark explanation:
[0022] 1, frame body;2, third limiting component;21, third roller;3, first jaw;4, second jaw;5, first limiting component;51, first limiting piece;511, first rotating part;512, first supporting part;52, first roller;6, second limiting component;61, second limiting piece;611, second rotating part;612, second supporting part;62, second roller;7, motor;100, shaft piece. Specific implementation
[0023] To make the purpose, technical scheme and advantage of the utility model more clear, the following will combine the utility model specific embodiment and corresponding drawing to the utility model technical scheme clear, complete is described. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the scope of the utility model protection.
[0024] The embodiment of the utility model is described in detail below, and the examples of the described embodiment are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.
[0025] In the description of the utility model, it is understood that the orientation or position relationship indicated by terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as the limitation of the utility model.
[0026] As Figure 1 And Figure 2As shown, a multi-point supporting center frame comprises a frame body 1 and a third limiting assembly 2 movably connected to the frame body 1, the frame body 1 is rotatably connected with a first clamping jaw 3 and a second clamping jaw 4, the first clamping jaw 3 and the second clamping jaw 4 are located on the two sides of the third limiting assembly 2, and the first clamping jaw 3 and the second clamping jaw 4 rotate towards opposite directions to clamp the shaft 100, at this time, the third limiting assembly 2 abuts against the shaft 100, and the first clamping jaw 3 and the second clamping jaw 4 cooperate with the third limiting assembly 2 to limit and support the workpiece.
[0027] The first clamping jaw 3 is movably connected with a first limiting assembly 5, and the first limiting assembly 5 has at least two rotating support points; the second clamping jaw 4 is movably connected with a second limiting assembly 6, and the second limiting assembly 6 has at least two rotating support points, so as to increase the support point positions of the shaft 100. The plurality of support points jointly bear the load, which can significantly improve the load capacity of the first clamping jaw 3 and the second clamping jaw 4, prolong the service life, effectively disperse the external force, reduce the shaking and deviation, and improve the stability of clamping.
[0028] The first limiting assembly 5 is rotatably connected to the inner side of the first clamping jaw 3, that is, the first limiting assembly 5 is rotatably connected to the side of the first clamping jaw 3 facing the second clamping jaw 4; the second limiting assembly 6 is rotatably connected to the inner side of the second clamping jaw 4, that is, the second limiting assembly 6 is rotatably connected to the side of the second clamping jaw 4 facing the first clamping jaw 3. The plurality of rotating support points of the first limiting assembly 5 and the plurality of rotating support points of the second limiting assembly 6 are oppositely arranged, so that the first limiting assembly 5 and the second limiting assembly 6 can clamp the opposite outer sides of the shaft 100, so as to ensure that the load can be uniformly distributed.
[0029] One end of the first clamping jaw 3 is rotatably connected with the frame body 1, and the other end is the free end of the first clamping jaw 3; one end of the second clamping jaw 4 is rotatably connected with the frame body 1, and the other end is the free end of the second clamping jaw 4. In this embodiment, the first clamping jaw 3 and the second clamping jaw 4 are drivingly connected through a motor 7, that is, the first clamping jaw 3 and the second clamping jaw 4 are simultaneously opened or closed by one motor 7, the maximum opening angle of the first clamping jaw 3 and the second clamping jaw 4 is an obtuse angle, and the first clamping jaw 3 and the second clamping jaw 4 are curved towards opposite directions.
[0030] Specifically, the first limiting assembly 5 is rotationally connected to the free end of the first clamping jaw 3, the first limiting assembly 5 comprises a first limiting piece 51 and a plurality of first rollers 52, the plurality of first rollers 52 are rotationally connected with the first limiting piece 51, the rotation central axes of the plurality of first rollers 52 are arranged in parallel, and the plurality of first rollers 52 are distributed in a circular arc shape so that the first rollers 52 can all abut against the shaft piece 100. In the embodiment, the first limiting piece 51 comprises a first rotating part 511 and a first supporting part 512, the first rotating part 511 is rotationally connected with the free end of the first clamping jaw 3, the first supporting part 512 is fixedly connected with the first rotating part 511, the first supporting part 512 is in a “V” shape, and each of the two ends of the first supporting part 512 rotationally connects one first roller 52, that is, the first rollers 52 are two. When the shaft piece 100 rolls against the first rollers 52, the shaft piece 100 avoids contacting the first supporting part 512, thereby reducing the risk of wear of the shaft piece 100.
[0031] Specifically, the second limiting assembly 6 is rotationally connected to the free end of the second clamping jaw 4, the second limiting assembly 6 comprises a second limiting piece 61 and a plurality of second rollers 62, the plurality of second rollers 62 are rotationally connected with the second limiting piece 61, the rotation central axes of the plurality of second rollers 62 are arranged in parallel, and the plurality of second rollers 62 are distributed in a circular arc shape so that the second rollers 62 can all abut against the shaft piece 100. In the embodiment, the second limiting piece 61 comprises a second rotating part 611 and a second supporting part 612, the second rotating part 611 is rotationally connected with the free end of the second clamping jaw 4, the second supporting part 612 is fixedly connected with the second rotating part 611, the second supporting part 612 is in a “V” shape, and each of the two ends of the second supporting part 612 rotationally connects two second rollers 62, that is, the second rollers 62 are two. When the shaft piece 100 rolls against the second rollers 62, the shaft piece 100 avoids contacting the second supporting part 612, thereby reducing the risk of wear of the shaft piece 100. The first limiting assembly 5 and the second limiting assembly 6 are symmetrically arranged, that is, the first rollers 52 and the second rollers 62 correspond one by one, the rotation central axes of the second rollers 62 and the rotation central axes of the first rollers 52 are arranged in parallel, so that the positions of the shaft piece 100 subjected to the supporting force are symmetrical, and the two clamping jaws can more uniformly provide more uniform clamping force on the outer circumferential side of the shaft piece 100, thereby avoiding excessive local stress to cause damage to the shaft piece 100.
[0032] In other embodiments, the opposite sides of the first limiting member 51 and the second limiting member 61 are both arc-shaped. A plurality of first rollers 52 are rotatably connected to the side of the first limiting member 51 facing the second limiting member 61. These first rollers 52 are distributed in an arc shape, and their arc trajectory matches the arc trajectory of the outer periphery of the shaft 100. A plurality of second rollers 62 are rotatably connected to the side of the second limiting member 61 facing the first limiting member 51. These second rollers 62 are also distributed in an arc shape. Preferably, when the first rollers 52 and the second rollers 62 abut against the limiting shaft 100, the rotational axes of the first rollers 52 and the rotational axes of the second rollers 62 are on the same circular trajectory. The first rollers 52 and the second rollers 62 provide multiple rotational support points for the shaft 100. The first rollers 52 and the second rollers 62 can more effectively distribute the load borne by the shaft 100, avoiding single-point overload, thereby improving the reliability and durability of the entire system.
[0033] like Figure 3 As shown, in this embodiment, the third limiting component 2 is rotatably connected to the frame 1, and the third limiting component 2 can rotate slightly between the first gripper 3 and the second gripper 4. The portion of the third limiting component 2 extending out of the frame 1 is rotatably connected to several third rollers 21, the rotation axis of the several third rollers 21 being parallel to the rotation axis of the first roller 52. Specifically, there are two third rollers 21, and the two third rollers 21 abut against the side of the shaft 100. In other embodiments, multiple third rollers 21 can be arranged in an arc shape to provide multiple support points on the lateral outer periphery of the shaft 100.
[0034] The third limiting component 2, the first limiting component 5, and the second limiting component 6 are distributed in a planar triangular structure. Preferably, the frame 1 is fixed vertically on the machine tool, and the first gripper 3 and the second gripper 4 are distributed vertically. Since the clamped shaft 100 is placed horizontally, that is, the rotation axis of the shaft 100 is set horizontally, and the rotation axis of the shaft 100 is parallel to the rotation axis of the first roller 52. The first limiting component 5 restricts the top of the outer periphery of the shaft 100, the second limiting component 6 supports the bottom of the outer periphery of the shaft 100, and the third limiting component supports the side of the outer periphery of the shaft 100, providing support and limiting for the shaft 100 from three directions. Each position has two rotation support points to distribute the pressure in the corresponding direction, ensuring that the shaft 100 can be rotated in a stable state for machining.
[0035] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the examples should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.
Claims
1. A multi-point supported central frame, characterized in that, include: The frame (1), the first gripper (3) and the second gripper (4) are movably connected to the first limiting component (5), the first limiting component (5) having at least two rotational support points. The second gripper (4) is movably connected to the second limiting component (6), the second limiting component (6) having at least two rotational support points. The frame (1) is movably connected to the third limiting component (2). The first gripper (3) and the second gripper (4) are rotatably connected to the frame (1) on both sides of the third limiting component (2). The first limiting component (5) and the second limiting component (6) cooperate with the third limiting component (2) to provide multi-point support for the shaft (100).
2. The multi-point supported center frame according to claim 1, characterized in that: The first limiting component (5) is rotatably connected to the side of the first gripper (3) facing the second gripper (4), and the second limiting component (6) is rotatably connected to the side of the second gripper (4) facing the first gripper (3). The rotation support point of the first limiting component (5) is set opposite to the rotation support point of the second limiting component (6).
3. A multi-point supported central frame according to claim 1, characterized in that: The third limiting component (2) has at least two rotational support points, and the third limiting component (2), the first limiting component (5), and the second limiting component (6) are distributed in a planar triangular structure.
4. A multi-point supported central frame according to claim 1, characterized in that: The first limiting component (5) includes a first limiting member (51) and a plurality of first rollers (52). The first limiting member (51) is rotatably connected to the free end of the first gripper (3). The plurality of first rollers (52) are rotatably connected to the first limiting member (51) in an arc distribution. The rotation axes of the plurality of first rollers (52) are arranged in parallel. The second limiting component (6) includes a second limiting member (61) and a plurality of second rollers (62). The second limiting member (61) is rotatably connected to the free end of the second gripper (4). The plurality of second rollers (62) are rotatably connected to the second limiting member (61) in an arc distribution. The rotation axis of the plurality of second rollers (62) is parallel to the rotation axis of the first roller (52).
5. A multi-point supported central frame according to claim 4, characterized in that: When the first roller (52) and the second roller (62) restrict the shaft (100), the rotation axis of the first roller (52) and the rotation axis of the second roller (62) are on the same circular trajectory.
6. A multi-point supported central frame according to claim 5, characterized in that: The third limiting component (2) is rotatably connected to a plurality of third rollers (21), which are arranged in an arc shape to support the shaft (100) from the side to the outer periphery.
7. A multi-point supported center frame according to claim 6, characterized in that: The frame (1) is fixedly equipped with a motor (7), which is connected to the third limiting component (2) for transmission. The third limiting component (2) moves relative to the frame (1) to accommodate shafts (100) of different sizes.
8. A multi-point supported center frame according to claim 7, characterized in that: There are two first rollers (52), two second rollers (62), and two third rollers (21).
9. A multi-point supported central frame according to claim 1, characterized in that: The maximum opening angle between the first gripper (3) and the second gripper (4) is an obtuse angle, and the first gripper (3) and the second gripper (4) are bent in opposite directions.