Centre shaft dismounting device for live center

Abstract

A center shaft to be detached is installed in a live center shell, the detaching device comprises a detaching frame, a center rear plug seat with a threaded part is installed at the top end of the detaching frame, the threaded part can be connected with the tail end of the live center shell in a matched mode, and a center hole is formed in the middle of the center rear plug seat. The center hole faces the tail end of the center shaft in the direction of the center line of the center shaft. A linear actuator is fixed to the dismounting frame, and a dismounting shaft is fixed to the movable execution end of the linear actuator. The dismounting shaft is provided with an ejection end which can penetrate through the center hole and apply axial ejection force to the tail end of the center shaft. The device can quickly fix the live center shell so as to realize quick disassembly of the center shaft, meanwhile, the center shaft can be prevented from being damaged in the disassembly process, and the rotating precision of the live center is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of center shaft technology, specifically a center shaft disassembly device for a live center. Background Technology

[0002] A rotating center, also known as a swivel center, is a machine tool component used in machining to support the workpiece. It contains an internal bearing structure and rotates with the workpiece, thereby reducing friction and heat accumulation. Compared to fixed centers, rotating centers are more suitable for high-speed machining, maintaining workpiece stability during high-speed rotation. Since the accuracy of the rotating center's spindle determines its rotational accuracy, disassembly of the spindle is crucial during installation and maintenance. Currently, there is a lack of a device that allows for quick disassembly of the spindle while preventing damage. Utility Model Content

[0003] The purpose of this invention is to provide a device for disassembling the center shaft of a live center. This device can quickly fix the housing of the live center to achieve rapid disassembly of the center shaft. At the same time, the disassembly process can avoid damage to the center shaft and ensure the rotational accuracy of the live center.

[0004] The technical solution adopted by this utility model is: a center shaft disassembly device for a live center, wherein the center shaft to be disassembled is installed inside the live center housing, and the disassembly device includes a disassembly frame, wherein a center rear plug with a threaded portion is installed on the disassembly frame, the threaded portion being able to be adapted to and connected to the tail end of the live center housing, and the center rear plug having a central hole in the middle, the central hole being directed toward the tail end of the center shaft along the center line direction of the center shaft.

[0005] A linear actuator is fixed on the disassembly frame, and a disassembly shaft is fixed to the movable actuating end of the linear actuator; the disassembly shaft has an ejector end that can pass through the central hole and apply an axial ejection force to the tail end of the tip shaft.

[0006] As a preferred option, the top rear plug and the disassembly bracket are detachably connected.

[0007] As a preferred embodiment, the top rear plug has a radial extension, and the disassembly frame has a clamping mechanism for securing the radial extension.

[0008] As a preferred embodiment, the clamping mechanism includes a bolt and an adjusting pad. The disassembly frame is provided with a threaded hole adapted to the bolt, and the adjusting pad has a waist-shaped hole in the middle for the bolt to pass through. The adjusting pad cooperates with the top surface of the disassembly frame to clamp the radial extension.

[0009] As a preferred embodiment, the top surface of the disassembly frame is provided with a receiving groove for accommodating the radial extension, and the shape and size of the receiving groove are adapted to the radial extension.

[0010] As a preferred embodiment, the disassembly frame includes a lower disassembly frame base, an upper disassembly frame base, and a connecting frame fixed between the lower disassembly frame base and the upper disassembly frame base;

[0011] The top end cap is mounted on the upper seat of the disassembly frame, and the upper seat of the disassembly frame has a through hole in the middle for the ejector end to pass through.

[0012] As a preferred option, the linear actuator is a jack, hydraulic cylinder, or pneumatic cylinder.

[0013] As a preferred embodiment, the disassembly shaft is detachably connected to the active actuator end of the linear actuator.

[0014] As a preferred embodiment, the outer diameter of the ejector end is smaller than the outer diameter of the tail end of the center shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model replaces the conventional rear plug of the live center with a center rear plug seat, which can realize the quick fixation of the live center shell and ensure stability during disassembly.

[0017] The center post has a central hole, which provides room for the disassembly shaft to move, allowing the disassembly shaft to be disassembled by axial ejection, thus avoiding damage to the center shaft during disassembly and ensuring the rotational accuracy of the live center.

[0018] 2. The top rear plug and the disassembly bracket are connected in a detachable manner, which facilitates installation and quick replacement. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A diagram illustrating the top-tier living organism;

[0021] Figure 2 This is a schematic cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram showing the state of the disassembly and disassembly of the live tip of this utility model.

[0023] Figure 4 This is a cross-sectional schematic diagram of the center rear plug of this utility model;

[0024] Figure 5This is a schematic diagram of the adjusting pad in this utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of the upper seat of the disassembly frame in this utility model.

[0026] Reference numerals: 1. Live center housing, 2. Center shaft, 3. Disassembly bracket, 301. Lower disassembly bracket seat, 302. Upper disassembly bracket seat, 303. Connecting bracket, 304. Receiving groove, 4. Center rear plug, 401. Threaded part, 402. Center hole, 403. Radial extension part, 5. Linear actuator, 6. Disassembly shaft, 601. Ejector end, 7. Bolt, 8. Adjusting shim. Detailed Implementation

[0027] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," or "the," etc., used in this utility model patent application specification and claims do not express a quantity limitation, but rather indicate the presence of at least one; the terms "first," "second," and "third," as used herein, should not be considered as a limitation on the order of components, but are merely for distinguishing different components; the terms "comprising" or "including," etc., indicate that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0029] To more clearly describe the specific structural components of the center shaft disassembly device for the live center, see attached... Figure 1-6 This embodiment is described as follows:

[0030] like Figure 1-4 As shown, a center shaft disassembly device for a live center is disclosed. The center shaft 2 to be disassembled is installed inside the live center housing 1. The disassembly device includes a disassembly frame 3, with a center rear plug 4 mounted on the top of the disassembly frame 3. The center rear plug 4 has a threaded portion 401, which is adapted to the internal thread at the tail end of the live center housing 1. The center rear plug 4 has a central hole 402 in the middle, which faces the tail end of the center shaft 2 along the centerline direction. A linear actuator 5 is fixed on the disassembly frame 3, and a disassembly shaft 6 is fixed to the movable actuating end of the linear actuator 5. The disassembly shaft 6 has an ejector end 601 that can pass through the central hole 402 and apply an axial ejection force to the tail end of the center shaft 2.

[0031] When disassembling the center shaft 2 of the live center, first remove the original closed rear plug of the live center, then install the center rear plug 4, which is compatible with the model of the live center, onto the live center housing 1 of the live center. The center rear plug 4 is connected to the tail end of the live center housing 1 by a thread. Then fix the center rear plug 4 onto the disassembly frame 3 to ensure that the live center housing 1 is not loose. Then control the linear actuator 5 to drive the disassembly shaft 6 to move along the center line of the live center housing 1. The ejector end 601 of the disassembly shaft 6 passes through the center hole 402 of the center rear plug 4 and pushes against the tail end of the center shaft 2. After controlling the disassembly shaft 6 at a suitable speed, slowly push the center shaft 2 out of the bearing cavity of the live center housing 1 from the other side.

[0032] The center rear plug 4 is detachably connected to the removal bracket 3 to facilitate the installation and quick replacement of the center rear plug 4. The detachability is achieved in the following ways:

[0033] The center rear plug 4 has a radial extension 403, the outer diameter of which is larger than the threaded portion 401, so as to protrude to the outside of the live center housing 1. The disassembly bracket 3 has a clamping mechanism for fixing the radial extension 403. See reference. Figure 2 and Figure 5 Specifically, the clamping mechanism includes bolts 7 and adjusting pads 8. The disassembly frame 3 is provided with threaded holes that are compatible with bolts 7. The adjusting pad 8 has a waist-shaped hole in the middle for the bolts 7 to pass through (the waist-shaped hole is conducive to the lateral position adjustment of the adjusting pad 8 and makes it convenient to place the radial extension 403 below the adjusting pad 8). There are no fewer than two bolts 7. The radial extension 403 is placed between the adjusting pad 8 and the top surface of the disassembly frame 3. The bolts 7 are rotated to make the bolt heads press against the adjusting pad 8. The adjusting pad 8 cooperates with the top surface of the disassembly frame 3 to clamp the radial extension 403, thereby ensuring the stability of the live center housing 1.

[0034] See Figure 6 Furthermore, a receiving groove 304 for accommodating the radial extension 403 is provided on the top surface of the disassembly frame 3. The shape and size of the receiving groove 304 are adapted to the radial extension 403. The radial extension 403 of the center back plug 4 is placed in the receiving groove 304, and the upper side of the radial extension 403 is pressed by the bolt 7 and the adjusting shim 8, which further improves the stability of the center back plug 4 and the live center housing 1, so that the disassembly shaft can be disassembled in an axial ejection manner, avoiding damage to the center shaft during disassembly, thereby ensuring the rotational accuracy of the live center.

[0035] The disassembly frame 3 includes a lower disassembly frame 301, an upper disassembly frame 302, and a connecting frame 303 fixed between the lower disassembly frame 301 and the upper disassembly frame 302; the top end plug 4 and the clamping mechanism are both installed on the upper disassembly frame 302, and the upper disassembly frame 302 has a through hole in the middle for the ejector end 601 to pass through.

[0036] The linear actuator 5 is a jack, hydraulic cylinder, or pneumatic cylinder.

[0037] The disassembly shaft 6 is detachably connected to the movable actuator end of the linear actuator 5 to facilitate the replacement of the disassembly shaft 6. The outer diameter of the ejector end 601 is smaller than the outer diameter of the tail end of the center shaft 2 to avoid obstruction when the ejector end 601 moves within the movable center housing 1.

[0038] The parts not described in detail in the above embodiments are existing technologies.

[0039] It should be noted that although the present invention has been described through the above embodiments, there may be other various embodiments of the present invention. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but all such changes and modifications should fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A device for removing a center shaft of a live center, wherein the center shaft (2) to be removed is installed inside the housing (1) of the live center, characterized in that: The disassembly device includes a disassembly frame (3), on which a center back plug (4) with a threaded portion (401) is mounted. The threaded portion (401) can be adapted to connect with the tail end of the live center housing (1). The center back plug (4) has a center hole (402) in the middle, and the center hole (402) faces the tail end of the center shaft (2) along the center line direction of the center shaft (2). A linear actuator (5) is fixed on the disassembly frame (3), and a disassembly shaft (6) is fixed to the movable execution end of the linear actuator (5); the disassembly shaft (6) has an ejector end (601) that can pass through the central hole (402) and apply an axial ejection force to the tail end of the tip shaft (2).

2. The center shaft disassembly device for a live center according to claim 1, characterized in that: The top rear plug (4) and the disassembly bracket (3) are detachably connected.

3. The center shaft disassembly device for a live center according to claim 1, characterized in that: The top end cap (4) has a radial extension (403), and the disassembly frame (3) has a clamping mechanism for fixing the radial extension (403).

4. A center shaft disassembly device for a live center according to claim 3, characterized in that: The clamping mechanism includes a bolt (7) and an adjusting pad (8). The disassembly frame (3) is provided with a threaded hole that is adapted to the bolt (7). The adjusting pad (8) has a waist-shaped hole in the middle for the bolt (7) to pass through. The adjusting pad (8) cooperates with the top surface of the disassembly frame (3) to clamp the radial extension (403).

5. A center shaft disassembly device for a live center according to claim 3, characterized in that: The top surface of the disassembly frame (3) is provided with a receiving groove (304) for accommodating the radial extension (403), and the shape and size of the receiving groove (304) are adapted to the radial extension (403).

6. A center shaft disassembly device for a live center according to claim 1, characterized in that: The disassembly frame (3) includes a lower disassembly frame base (301), an upper disassembly frame base (302), and a connecting frame (303) fixed between the lower disassembly frame base (301) and the upper disassembly frame base (302). The top end cap (4) is mounted on the upper seat of the disassembly frame (302), and the upper seat of the disassembly frame (302) has a through hole in the middle for the ejector end (601) to pass through.

7. A center shaft disassembly device for a live center according to claim 1, characterized in that: The linear actuator (5) is a jack, hydraulic cylinder or pneumatic cylinder.

8. A center shaft disassembly device for a live center according to claim 1, characterized in that: The disassembly shaft (6) is detachably connected to the active actuator end of the linear actuator (5).

9. A center shaft disassembly device for a live center according to claim 1, characterized in that: The outer diameter of the ejector end (601) is smaller than the outer diameter of the tail end of the tip shaft (2).

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