Clamping spindle

Abstract

The utility model discloses a clamping spindle which comprises a spindle body and a clamping assembly installed at the front end of the spindle body, and the clamping assembly comprises a clamping base, an air cylinder installed at the front end of the clamping base, a piston installed in the air cylinder and a connecting base installed at the front end of the air cylinder. An air cylinder shaft is arranged at the front end of the clamping base in the axial direction, a conical shaft is arranged at the front end of the air cylinder shaft in the axial direction, a connecting base hole is formed in the connecting base in the axial direction, the air cylinder shaft penetrates out of the piston in the axial direction, the conical shaft penetrates out of the connecting base hole in the axial direction, and a clamping sleeve is installed at the front end of the piston. The conical shaft is movably sleeved in the conical hole in the clamping sleeve, and when the piston drives the clamping sleeve to move along the axial direction of the conical shaft, the conical shaft forces the clamping sleeve to contract and contract along the radial direction, so that a load body sleeved on the clamping sleeve is released or tensioned; the device is convenient to mount and dismount, and higher in working efficiency and precision.

Description

Technical Field

[0001] The utility model relates to the technical field of main shafts, in particular to a clamping main shaft which is convenient to install and disassemble. Background Art

[0002] The spindle is the axis on a machine that holds a workpiece or tool and rotates it, enabling various machining operations. The spindle plays a crucial role in machining, directly impacting both quality and efficiency.

[0003] For example, the spindle of a dynamic balancing machine uses a rigid flange connection or uses air pressure or hydraulic back-pull to install the workpiece. This makes installation and removal cumbersome, affecting work efficiency; the installation accuracy is poor, which also affects processing accuracy. Utility Model Content

[0004] In order to overcome at least one of the technical problems existing in the prior art, the utility model provides a clamping spindle, which is easy to install and disassemble, and has higher working efficiency and precision.

[0005] The cam is secured to the front of the cylinder and has a camming element which is adapted to move the cylinder when the cam is in motion.

[0006] In some embodiments, an external air duct is opened axially on the clamping seat, and a connecting seat air duct is opened axially on the connecting seat; the rear end of the external air duct is connected to the main air duct, and the front end of the external air duct is connected to the rear end of the connecting seat air duct, and the front end of the connecting seat air duct can be used for vacuum adsorption of the carrier.

[0007] In some embodiments, a sleeve is removably installed at the front end of the piston through a locking assembly. The locking assembly includes a nut threadedly connected to the outer wall of the front end of the piston, a washer sleeved in the nut, and a limit ring radially arranged on the outer wall of the rear end of the sleeve. The rear end of the sleeve is axially inserted into the nut. When the nut is locked, the rear end of the sleeve and the limit ring are fixed in the nut.

[0008] In some embodiments, two concentric convex rings are provided on the front end face of the connecting seat, and the air hole provided at the front end of the air channel of the connecting seat is located in the area between the two convex rings. An annular groove is opened in each convex ring, and a sealing ring is installed in the annular groove.

[0009] In some embodiments, the inner air duct is a through hole that penetrates the clamping seat axially, a longitudinal air duct is opened radially on the clamping seat, and the outer air duct and the inner air duct are arranged side by side laterally; one end of the outer air duct penetrates the front end face of the clamping seat, and the other end is connected to the inner air duct through the longitudinal air duct, and one end of the longitudinal air duct penetrates the outer wall of the clamping seat, and a plug is installed on the outer wall of the clamping seat to close one end of the longitudinal air duct.

[0010] In some embodiments, at least one sealing ring is installed between the piston and the cylinder shaft of the connecting seat, between the inner wall of the cylinder and the outer wall of the clamping seat, and between the inner wall of the cylinder and the piston.

[0011] Additional aspects and advantages of the present invention will continue to be given in the following description, and some will become obvious from the following description or be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of this application;

[0014] Figure 2 It is a schematic diagram of the cross-sectional plan structure of the present application;

[0015] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 It is a schematic diagram of the main three-dimensional structure of the clamping assembly;

[0017] Figure 5 It is a rear view stereoscopic structural diagram of the clamping assembly;

[0018] Figure 6 yes Figure 5 Schematic diagram of the split structure;

[0019] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the clamping component.

[0020] Reference numerals:

[0021] Main axis 1, main airway 100, auxiliary airway 101;

[0022] Clamping assembly 2;

[0023] Clamping seat 20, cylinder shaft 200, tapered shaft 201, inner air channel 202, outer air channel

[0024] duct 203, longitudinal air duct 204, plug 205;

[0025] Cylinder 21, rear air chamber 210;

[0026] Piston 22, connecting seat 23;

[0027] Connecting seat hole 230, connecting seat airway 231, convex ring 232, annular groove 233,

[0028] Sealing ring 234;

[0029] Jacket 24, tapered hole 240;

[0030] Load body 3, plug hole 300, plug shaft 301;

[0031] Air source connector 4, locking assembly 5;

[0032] Nut 500 , washer 501 , and limiting ring 502 . DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside", are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0036] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] Reference Figure 1-Figure 7 , a clamping spindle, comprising a spindle 1, a clamping assembly 2 installed at the front end of the spindle 1, the spindle 1 is used to transmit power and transport gas, the clamping assembly 2 is used to install and remove the load body 3, the spindle 1 and the clamping assembly 2 are roughly cylindrical; the clamping assembly 2 comprises a clamping seat 20, a cylinder 21 installed at the front end of the clamping seat 20, a piston 22 installed in the cylinder 21, and a connecting seat 23 installed at the front end of the cylinder 21, also known as a tray; a cylinder shaft 200 is axially arranged in the middle of the front end of the clamping seat 20, a conical shaft 201 is axially arranged in the middle of the front end of the cylinder shaft 200, a connecting seat hole 230 is axially opened in the connecting seat 23, and the cylinder shaft 200 is arranged along the The conical shaft 201 axially passes through the piston 22 and the connecting seat hole 230. A sleeve 24 is installed at the front end of the piston 22. The conical shaft 201 is movably sleeved in the conical hole 240 in the sleeve 24. The tapers of the two are matched. When the piston 22 drives the sleeve 24 to move axially along the conical shaft 201, the conical shaft 201 forces the sleeve 24 to expand and contract radially, thereby releasing or tightening the load body 3 sleeved on the sleeve 24; a main air channel 100 is opened in the main shaft 1, and an internal air channel 202 is opened on the clamping seat 20, the rear end of which is connected to the main air channel 100, and the front end of the internal air channel 202 is connected to the rear air chamber 210 in the cylinder 21.

[0038] When in use, the load body 3 can be a workpiece or a tool. If it is a load body 3 with a plug hole 300, the load body 3 is sleeved on the sleeve 24 through the plug hole 300; if it is a load body 3 with a plug shaft 301 and a plug hole 300 is opened on the plug shaft 301, the plug hole 300 is aligned with the sleeve 24, and the plug shaft 301 is aligned with the connection seat hole 230 for insertion; the main shaft 1 can be fixed to the clamping seat 20 by multiple bolts, and a rotatable gas source connector 4 can be installed at one end of the main shaft 1. The gas enters the axial opening along the main shaft 1 through the gas source connector 4. The main air channel 100 is designed, and then enters the internal air channel 202 of the clamping seat 20 through the secondary air channel 101 opened radially along the main shaft 1, and then enters the rear air chamber 210 in the cylinder 21. By controlling the input and extraction of gas, the piston 22 drives the jacket 24 to move forward or backward along the conical shaft 201. The conical shaft 201 then forces the jacket 24 to expand or contract radially to reset, thereby tightening or releasing the load body 3 connected to the jacket 24. When the main shaft 1 rotates, it drives the clamping assembly 2 and the load body 3 to rotate synchronously, completing the corresponding processing action. This application is easy to install and disassemble, and has higher work efficiency and precision.

[0039] In some embodiments, an external air channel 203 is axially opened on the clamping seat 20, and a connecting seat air channel 231 is axially passed through on the connecting seat 23; the rear end of the external air channel 203 is connected to the main air channel 100, and the front end of the external air channel 203 is connected to the rear end of the connecting seat air channel 231, and the front end of the connecting seat air channel 231 can be used for vacuum adsorption of the load body 3; when gas is extracted from the main shaft 1, the jacket 24 will form a vacuum area between the connecting seat and the end face of the load body 3 through the external air channel 203 and the connecting seat air channel 231 while tightening the load body 3, thereby adsorbing the load body 3 and further increasing the reliability of the installation of the load body 3; when gas is input into the main shaft 1, the jacket 24 will loosen the load body 3 after shrinking and resetting, and the gas will give the load body 3 a thrust through the external air channel 203 and the connecting seat air channel 231, so that the jacket 24 is separated from the load body 3, which is convenient for taking out the load body 3 and is convenient and quick to use.

[0040] In some embodiments, a jacket 24 is removably installed at the front end of the piston 22 through a locking assembly 5. The locking assembly 5 includes a nut 500 threadedly connected to the outer wall of the front end of the piston 22, a washer 501 sleeved in the nut 500, and a limiting ring 502 radially arranged on the outer wall of the rear end of the jacket 24. The rear end of the jacket 24 is axially inserted into the nut 500. When the nut 500 is locked, the rear end of the jacket 24 and the limiting ring 502 are fixed in the nut 500 to achieve connection and fixation. The locking assembly 5 can conveniently realize the connection and disassembly of the piston 22 and the jacket 24, which is convenient for replacing components such as the jacket 24.

[0041] In some embodiments, two concentric convex rings 232 are provided on the front end face of the connecting seat 23, and the air hole provided at the front end of the connecting seat air channel 231 is located in the area between the two convex rings 232. An annular groove 233 is provided in each convex ring 232, and a sealing ring 234 is installed in the annular groove 233; the sealing ring 234 can improve the sealing performance of the connecting seat 23 and the load body 3 to prevent gas leakage. When the gas is discharged outward from the connecting seat air channel 231, a vacuum area can be formed between the end faces of the connecting seat 23 and the load body 3, thereby firmly adsorbing the load body 3.

[0042] In some embodiments, the inner air duct 202 is a through hole that passes through the clamping seat 20 axially, and a longitudinal air duct 204 is radially opened on the clamping seat 20, and the outer air duct 203 is arranged horizontally side by side with the inner air duct 202; one end of the outer air duct 203 passes through the front end face of the clamping seat 20, and the other end is connected with the inner air duct 202 through the longitudinal air duct 204, and one end of the longitudinal air duct 204 passes through the outer wall of the clamping seat 20, which is convenient for drilling and for connecting the main air duct 100, the inner air duct 202, and the outer air duct 203. A plug 205 is installed on the outer wall of the clamping seat 20 to close one end of the longitudinal air duct 204 to prevent gas from leaking outward; the gas in the main air duct 100 enters the clamping seat 20 and the cylinder 21 through the inner air duct 202, and can also be connected with the outer air duct 203 and the connecting seat air duct 231 through the longitudinal air duct 204. The structure is simple and convenient.

[0043] In some embodiments, at least one sealing ring 234 is installed between the piston 22 and the cylinder shaft 200 of the connecting seat 23, between the inner wall of the cylinder 21 and the outer wall of the clamping seat 20, and between the inner wall of the cylinder 21 and the piston 22 to improve the sealing and prevent gas leakage.

[0044] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although the embodiments of the present invention have been shown and described, ordinary technicians in this field can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A clamping spindle, comprising a spindle and a clamping assembly mounted at the front end of the spindle, characterized in that: The clamping assembly includes a clamping seat, a cylinder installed at the front end of the clamping seat, a piston installed in the cylinder, and a connecting seat installed at the front end of the cylinder; a cylinder shaft is axially arranged at the front end of the clamping seat, a conical shaft is axially arranged at the front end of the cylinder shaft, a connecting seat hole is axially opened in the connecting seat, the cylinder shaft passes through the piston axially, and the conical shaft passes through the connecting seat hole axially, a sleeve is installed at the front end of the piston, the conical shaft is movably sleeved in the conical hole in the sleeve, when the piston drives the sleeve to move axially along the conical shaft, the conical shaft forces the sleeve to expand and contract radially, thereby releasing or tightening the load body sleeved on the sleeve; a main air channel is opened in the main shaft, and an internal air channel whose rear end is connected to the main air channel is opened on the clamping seat, and the front end of the internal air channel is connected to the rear air chamber in the cylinder.

2. The clamping spindle according to claim 1, characterized in that: An external air duct is opened axially on the clamping seat, and a connecting seat air duct is opened axially on the connecting seat; the rear end of the external air duct is connected with the main air duct, and the front end of the external air duct is connected with the rear end of the connecting seat air duct, and the front end of the connecting seat air duct can be used for vacuum adsorption of the load.

3. The clamping spindle according to claim 1 or 2, characterized in that: A jacket is detachably installed at the front end of the piston through a locking assembly. The locking assembly includes a nut threadedly connected to the outer wall of the front end of the piston, a washer sleeved in the nut, and a limit ring radially arranged on the outer wall of the rear end of the jacket. The rear end of the jacket is axially inserted into the nut. When the nut is locked, the rear end of the jacket and the limit ring are fixed in the nut.

4. The clamping spindle according to claim 3, characterized in that: Two concentric convex rings are provided on the front end face of the connecting seat, and the air hole provided at the front end of the air passage of the connecting seat is located in the area between the two convex rings. An annular groove is opened in each convex ring, and a sealing ring is installed in the annular groove.

5. The clamping spindle according to claim 2, characterized in that: The inner air duct is a through hole that penetrates the clamping seat axially, and a longitudinal air duct is opened radially on the clamping seat. The outer air duct and the inner air duct are arranged side by side laterally; one end of the outer air duct penetrates the front end face of the clamping seat, and the other end is connected to the inner air duct through the longitudinal air duct. One end of the longitudinal air duct penetrates the outer wall of the clamping seat, and a plug is installed on the outer wall of the clamping seat to close one end of the longitudinal air duct.

6. The clamping spindle according to claim 5, wherein: At least one sealing ring is installed between the piston and the cylinder shaft of the connecting seat, between the inner wall of the cylinder and the outer wall of the clamping seat, and between the inner wall of the cylinder and the piston.

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