A rotary axis clamping device for machine tools

Abstract

The utility model discloses a rotary shaft clamping device for machine tools, comprising: a mounting shell mounted on the outer side of the rotary shaft, a stop ring mounted on the mounting shell, a friction plate with adjustable height mounted on the rotary shaft, the friction plate being located below the stop ring and having a gap therebetween, and when the oil cavity of the stop ring is introduced with pressure oil, the stop ring moves downward and contacts the friction plate. The utility model arranges a stop ring and a friction plate on the outer side of the rotary shaft, and the friction plate is pressed or disengaged by introducing pressure oil into or releasing pressure oil from the stop ring, thereby realizing the switching of clamping or loosening. The clamping device of the utility model has a simple and compact design, is easy to install, has low difficulty in parts processing, has low manufacturing cost, and is widely applicable.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool manufacturing, in particular to a rotary shaft clamping device for a machine tool. Background Art

[0002] The rotary axis of a machine tool mainly includes a rotary table and a swing axis. When processing a workpiece at a specified angle plane or feature orientation, especially when performing heavy cutting, the rotary axis of the machine tool needs to be designed with a clamping unit to achieve the clamping of the rotary parts at any angle, thereby ensuring the machining accuracy of the machine tool. At present, the clamping methods of the rotary axis of a machine tool include end gear clamping mechanism, disc clamping mechanism and embracing clamping mechanism. The above clamping methods are relatively complex in structure and installation, and the parts processing is difficult and the manufacturing cost is high. Utility Model Content

[0003] In view of the above defects or shortcomings, the purpose of the utility model is to provide a rotary shaft clamping device for a machine tool.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A rotary shaft clamping device for a machine tool comprises: a mounting shell mounted on the outside of the rotary shaft, a stop ring mounted on the mounting shell, a height-adjustable friction plate mounted on the rotary shaft, the friction plate being located below the stop ring with a gap provided therebetween, and when pressure oil is introduced into the oil chamber of the stop ring, the stop ring moves downward and contacts the friction plate.

[0006] The friction plate and the stop ring are fixedly mounted by a first screw.

[0007] A gasket for adjusting the gap between the lower end surface of the stop ring and the upper end surface of the friction plate is arranged at the mounting position of the friction plate and the stop ring.

[0008] A first installation groove is formed on the contact surface between the stop ring and the installation shell, and a first sealing member is installed in the first installation groove.

[0009] A second mounting groove is formed on the contact surface between the stop ring and the mounting shell, and a second sealing member is installed in the second mounting groove.

[0010] The stop ring is fixedly mounted on the mounting housing by a second screw.

[0011] The interior of the stop ring is a hollow oil cavity, and a refueling port connected to the oil cavity is opened on the side wall of the stop ring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model provides a rotary shaft clamping device for machine tools. A stop ring and a friction plate are arranged on the outer side of the rotary shaft. The friction plate is compressed or released by introducing pressure oil into or releasing pressure oil from the stop ring, thereby realizing switching of clamping or releasing. The clamping device of the utility model has simple and compact design, convenient installation, low difficulty in parts processing, low manufacturing cost and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the rotary shaft clamping device for machine tools of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the installation shell of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the stop ring of the utility model.

[0017] In the figure, 1 is the mounting housing; 2 is the retaining ring; 3 is the friction plate; 4 is the gasket; 5 is the rotating shaft; 6 is the first screw; 7 is the first sealing member; 8 is the second sealing member; 9 is the second screw; 10 is the oil filling port; and 11 is the oil chamber. DETAILED DESCRIPTION

[0018] The utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0019] like Figure 1-3 As shown, the utility model provides a rotary shaft clamping device for a machine tool, comprising: a mounting shell 1 mounted on a rotary shaft 5, a stop ring 2 mounted on the mounting shell 1, a height-adjustable friction plate 3 mounted on the rotary shaft 5, the friction plate 3 being located below the stop ring 2 and a gap being provided therebetween, when pressure oil is introduced into the oil chamber of the stop ring 2, the stop ring 2 moves downward and contacts the friction plate 3.

[0020] Specifically, the friction plate 3 and the stop ring 2 are fixedly mounted by a first screw 6. A gasket 4 for adjusting the gap between the lower end surface of the stop ring 2 and the upper end surface of the friction plate 3 is provided at the mounting position of the friction plate 3 and the stop ring 2.

[0021] Preferably, the contact surface between the stop ring 2 and the mounting housing 1 is provided with a first mounting groove, in which a first sealing member 7 is installed; the contact surface between the stop ring 2 and the mounting housing 1 is provided with a second mounting groove, in which a second sealing member 8 is installed. The overall sealing performance is increased to prevent oil leakage.

[0022] In addition, the stop ring 2 in the present invention is fixedly mounted on the mounting housing 1 by a second screw 9 , the interior of the stop ring 2 is a hollow oil chamber 11 , and a refueling port 10 connected to the oil chamber 11 is provided on the side wall of the stop ring 2 .

[0023] The working principle of the utility model is:

[0024] according to Figure 1 In the structure shown, the gasket 4 and the friction plate 3 are first installed on the rotating shaft 5 by the first screw 6, and then the first seal 7 and the second seal 8 are installed in the sealing groove of the stop ring 2. Then the stop ring 2 is fixedly connected to the housing 1 by the second screw 9, and the thickness of the gasket 4 is adjusted so that there is a gap of about 0.1mm between the lower end face of the stop ring 2 and the upper end face of the friction plate 3, and between the lower end face of the friction plate 3 and the inner end face of the housing 1, and the installation of the clamping device is completed.

[0025] When the rotary shaft 5 needs to be clamped, pressure oil is introduced into the oil chamber of the stop ring 2 through the oil filling port in the housing 1. The lower end surface of the stop ring 2 moves downward due to pressure deformation, thereby pressing the friction plate 3. The clamping is achieved by pressing the contact surface with the housing 1. At the same time, increasing the oil pressure can increase the clamping force. When the pressure oil is released, the stop ring returns to its initial state, and the friction plate 3 is separated from the contact surface and can be relaxed.

[0026] Specific working steps:

[0027] The first step: fix the gasket 4, the friction plate 3 and the rotating shaft 5 with screws, and fix the stop ring 2 and the mounting housing 1 to complete the assembly of the entire clamping device.

[0028] Step 2: Adjust the gasket 4 so that there is a gap of 0.1 mm between the lower end surface of the retaining ring 2 and the upper end surface of the friction plate 3, and between the lower end surface of the friction plate and the inner end surface of the mounting housing 1, which is a relaxed state.

[0029] Step 3: When clamping is required, pressurized oil is passed through the oil chamber of the stop ring, and the lower end surface of the stop ring 2 moves downward due to deformation, thereby pressing the friction plates 3 and achieving clamping through the clamping contact surface.

[0030] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred schemes of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. A rotary axis clamping device for a machine tool, characterized in that: include: A mounting shell (1) is mounted on a rotating shaft (5), a retaining ring (2) is mounted on the mounting shell (1), a friction plate (3) with adjustable height is mounted on the rotating shaft (5), the friction plate (3) is located below the retaining ring (2) and a gap is provided between the friction plate (3), when pressure oil is introduced into the oil cavity of the retaining ring (2), the retaining ring (2) moves downward and contacts the friction plate (3).

2. The rotary axis clamping device for machine tools according to claim 1, characterized in that: The friction plate (3) and the stop ring (2) are fixedly mounted via a first screw (6).

3. The rotary axis clamping device for machine tools according to claim 2, characterized in that: A gasket (4) for adjusting the gap between the lower end surface of the stop ring (2) and the upper end surface of the friction plate (3) is provided at the mounting position of the friction plate (3) and the stop ring (2).

4. The rotary axis clamping device for a machine tool according to claim 1, characterized in that: A first installation groove is provided on the contact surface between the stop ring (2) and the installation housing (1), and a first sealing member (7) is installed in the first installation groove.

5. The rotary axis clamping device for machine tools according to claim 4, characterized in that: A second installation groove is provided on the contact surface between the stop ring (2) and the installation housing (1), and a second sealing member (8) is installed in the second installation groove.

6. The rotary axis clamping device for a machine tool according to claim 1, characterized in that: The stop ring (2) is fixedly mounted on the mounting housing (1) by means of a second screw (9).

7. The rotary axis clamping device for a machine tool according to claim 1 or 6, characterized in that: The interior of the stop ring (2) is a hollow oil chamber (11), and a refueling port (10) connected to the oil chamber (11) is provided on the side wall of the stop ring (2).

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