High-speed rotating joint for numerical control machine tool

Abstract

According to the technical scheme, the high-speed rotating joint for the numerical control machine tool is characterized in that a first sealing ring and a second sealing ring are arranged and used for solving the sealing problem of a first bearing and an inner sealing cover, and a first clamping spring and a second clamping spring are arranged and used for solving the position limiting problem of the first bearing and the second bearing; the positions of the inner sealing cover, the first bearing, the second bearing and the rotating shaft are limited through the center shaft body, the first bearing and the inner sealing cover are sealed through the first sealing ring and the second sealing ring, the positions of the first bearing and the second bearing are limited through the first clamping spring and the second clamping spring, and the whole rotating shaft can rotate conveniently; the product can be subsequently used on a machine with a high-speed rotating shaft, such as numerically controlled lathe equipment, so that liquid or gas circulation is provided for the high-speed rotating equipment, and the purposes of liquid cooling, waste residue blowing and the like of the mechanical equipment can be achieved; and the replacement between the inner sealing cover and the central shaft main body and the replacement between the rotating shaft and the central shaft main body are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of rotary joints, in particular to a high-speed rotary joint for numerically controlled machine tools. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool. It is an automated machine tool equipped with a program control system. CNC machine tool has better solved the problem of complex, precise, small batch and multi-variety parts processing. It is a flexible and high-efficiency automated machine tool, representing the development direction of modern machine tool control technology. It is a typical mechatronics product. The processing accuracy of CNC machine tool can generally reach 0.05-0.1mm. CNC machine tool is controlled in the form of digital signal. Every time the CNC device outputs a pulse signal, the moving part of the machine tool moves a pulse equivalent (generally 0.001mm), and the reverse clearance of the machine tool feed transmission chain and the average error of the lead screw pitch can be compensated by the CNC device. Therefore, the positioning accuracy of CNC machine tool is relatively high. CNC machine tool has a wide range of adaptability. When the processing object changes, only the input program instruction needs to be changed; the processing performance is higher than that of general automatic machine tools, and complex surfaces can be accurately processed. Therefore, it is suitable for processing small and medium batches, frequent modifications, high precision requirements, and complex shapes of workpieces, and can obtain good economic results.

[0003] However, when the high-speed rotating axis on the CNC lathe equipment is working, the liquid or gas circulation is insufficient, which makes it difficult to obtain liquid cooling and may affect production efficiency.

[0004] Therefore, a high-speed rotary joint for numerically controlled machine tools is needed. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a high-speed rotary joint for CNC machine tools, in which the positions of an inner cover, a first bearing, a second bearing and a rotating shaft are limited by a central shaft body, a first sealing ring and a second sealing ring seal the first bearing and the inner cover, and a first retaining spring and a second retaining spring limit the positions of the first bearing and the second bearing. The rotating shaft is easy to rotate as a whole, which is beneficial for the subsequent use of the product in machinery with high-speed rotating shafts, such as CNC lathe equipment, to provide liquid or gas circulation for high-speed rotating equipment, so that the mechanical equipment can be cooled by liquid, waste slag can be blown away, etc., thereby improving production efficiency.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A high-speed rotary joint for a numerically controlled machine tool, comprising a central shaft body, an inner cover installed inside the central shaft body, a first sealing ring installed at the inner end of the inner cover, a first retaining spring installed at the rear end of the first sealing ring, a first bearing installed inside the first retaining spring, the first bearing being matched with the inner cover, a second sealing ring installed at the rear side of the first bearing, a plurality of second bearings installed at the rear end of the second sealing ring, a second retaining spring installed at the rear end of the second bearing, a rotating shaft installed inside the second retaining spring, and the rotating shaft passes through the second bearing and the first bearing;

[0008] The positions of the inner cover, the first bearing, the second bearing and the rotating shaft are limited by the central shaft body, the first sealing ring and the second sealing ring seal the first bearing and the inner cover, the first retaining spring and the second retaining spring limit the positions of the first bearing and the second bearing, and the rotating shaft is easy to rotate as a whole, which is beneficial for the subsequent use of the product in machinery with high-speed rotating shafts such as CNC lathe equipment, providing liquid or gas circulation for high-speed rotating equipment, enabling the mechanical equipment to be cooled by liquid, blowing away waste slag, etc., thereby improving production efficiency.

[0009] Furthermore, a plurality of through holes are formed at the front end of the inner cover, and a convex tube is fixedly connected to the rear end of the inner cover, and the convex tube is matched with the first sealing ring and the first retaining spring;

[0010] The through hole facilitates subsequent installation, and the convex tube facilitates subsequent connection.

[0011] Furthermore, a plurality of balls are installed inside the first bearing, an inner ring is installed inside the balls, and the inner ring is adapted to the rotating shaft;

[0012] The first bearing can rotate easily through the cooperation of the inner ring and the ball.

[0013] Furthermore, the front end of the rotating shaft is rotatably connected to a connecting shaft, and the rear end of the rotating shaft is rotatably connected to a connecting ring;

[0014] The rotation of the rotating shaft is facilitated by the connecting shaft and the connecting ring.

[0015] Furthermore, the front end of the second bearing is rotatably connected to a plurality of balls arranged at equal distances, and the front end of the balls is rotatably connected to a disc;

[0016] The second bearing is facilitated to rotate by the balls and the disc.

[0017] Further, the inner cover is threadedly connected to the central shaft body;

[0018] The inner cover and the central shaft body can be easily replaced by threaded connection.

[0019] Further, the rotating shaft is threadedly connected to the central shaft body;

[0020] The threaded connection makes it easy to replace the rotating shaft and the central shaft body.

[0021] In summary, the utility model has the following beneficial effects:

[0022] 1. The positions of the inner cover, the first bearing, the second bearing and the rotating shaft are limited by the central shaft body. The first sealing ring and the second sealing ring seal the first bearing and the inner cover. The first retaining spring and the second retaining spring limit the positions of the first bearing and the second bearing. The rotating shaft is easy to rotate as a whole, which is conducive to the subsequent use of the product in machinery with high-speed rotating shafts such as CNC lathe equipment, providing liquid or gas circulation for high-speed rotating equipment, enabling the mechanical equipment to be cooled by liquid, blowing away waste slag, etc., thereby improving production efficiency;

[0023] 2. The threaded connection makes it easy to replace the inner cover and the central shaft body;

[0024] 3. The threaded connection facilitates the replacement of the rotating shaft and the center shaft body, and facilitates the subsequent connection of the threaded pipe so that the joint is connected to the rotating shaft of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the overall three-dimensional structure of this embodiment;

[0026] Figure 2 It is the overall analysis diagram of this embodiment;

[0027] Figure 3 is a three-dimensional diagram of the inner cover in this embodiment;

[0028] Figure 4 is a three-dimensional diagram of the first bearing in this embodiment;

[0029] Figure 5 is a three-dimensional diagram of the rotating shaft in this embodiment;

[0030] Figure 6 It is a three-dimensional diagram of the second bearing in this embodiment.

[0031] In the figure, 1. central shaft body; 2. inner cover; 3. first bearing; 4. rotating shaft; 5. first retaining spring; 6. second retaining spring; 7. first sealing ring; 8. second sealing ring; 9. second bearing. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0033] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0034] Reference Figure 1 , Figure 2 As shown, a high-speed rotary joint for a numerically controlled machine tool in a preferred embodiment of the utility model comprises a central shaft body 1, a central shaft body 1, an inner cover 2 is installed inside the central shaft body 1, a first sealing ring 7 is installed on the inner end of the inner cover 2, a first retaining spring 5 is installed at the rear end of the first sealing ring 7, a first bearing 3 is installed inside the first retaining spring 5, the first bearing 3 is matched with the inner cover 2, a second sealing ring 8 is installed on the rear side of the first bearing 3, a plurality of second bearings 9 are installed at the rear end of the second sealing ring 8, a second retaining spring 6 is installed at the rear end of the second bearing 9, a rotating shaft 4 is installed inside the second retaining spring 6, and the rotating shaft 4 passes through the second bearing 9 and the first bearing 3;

[0035] The positions of the inner cover 2, the first bearing 3, the second bearing 9 and the rotating shaft 4 are limited by the central shaft body 1, the first sealing ring 7 and the second sealing ring 8 seal the first bearing 3 and the inner cover 2, the first retaining spring 5 and the second retaining spring 6 limit the positions of the first bearing 3 and the second bearing 9, and the rotating shaft 4 is easy to rotate as a whole, which is beneficial for the subsequent use of the product in machinery with high-speed rotating shafts such as CNC lathe equipment, providing liquid or gas circulation for high-speed rotating equipment, enabling the mechanical equipment to be cooled by liquid, and blowing away waste slag, etc., thereby improving production efficiency.

[0036] Reference Figure 3 As shown, the front end of the inner cover 2 is provided with a plurality of through holes, and the rear end of the inner cover 2 is fixedly connected with a convex tube, which is matched with the first sealing ring 7 and the first retaining spring 5;

[0037] The through hole facilitates subsequent installation, and the convex tube facilitates subsequent connection.

[0038] Reference Figure 4 As shown, a plurality of balls are installed inside the first bearing 3, an inner ring is installed inside the balls, and the inner ring is adapted to the rotating shaft 4;

[0039] The inner ring and the ball cooperate to facilitate the first bearing 3 to rotate.

[0040] Reference Figure 5 As shown, the front end of the rotating shaft 4 is rotatably connected to a connecting shaft, and the rear end of the rotating shaft 4 is rotatably connected to a connecting ring;

[0041] The rotation of the rotating shaft 4 is facilitated by the connecting shaft and the connecting ring.

[0042] Reference Figure 6 As shown, the front end of the second bearing 9 is rotatably connected to a plurality of balls arranged at equal distances, and the front end of the balls is rotatably connected to a disc;

[0043] The second bearing 9 is facilitated to rotate by the balls and the disc.

[0044] Reference Figure 3 As shown, the inner cover 2 is threadedly connected to the central shaft body 1;

[0045] The inner cover 2 and the central shaft body 1 are easily replaced by threaded connection.

[0046] Reference Figure 5 As shown, the rotating shaft 4 is threadedly connected to the central shaft body 1;

[0047] The threaded connection facilitates the replacement of the rotating shaft 4 and the central shaft body 1 .

[0048] Specific implementation process: the central shaft body 1 limits the positions of the inner cover 2, the first bearing 3, the second bearing 9, and the rotating shaft 4; the first sealing ring 7 and the second sealing ring 8 seal the first bearing 3 and the inner cover 2; the first retaining spring 5 and the second retaining spring 6 limit the positions of the first bearing 3 and the second bearing 9; the rotating shaft 4 is convenient for overall rotation, which is beneficial for the subsequent use of the product in machinery with high-speed rotating shafts, such as CNC lathe equipment, to provide liquid or gas circulation for high-speed rotating equipment, so that the mechanical equipment can be cooled by liquid, waste residue can be blown away, etc., thereby improving production efficiency. When installing the joint, the rotating shaft 4 of the joint is connected to the threaded pipe, and then the threaded pipe is connected to the rotating shaft of the machine tool, so that a channel for gas and cooling liquid circulation is formed inside the joint.

[0049] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-speed rotary joint for CNC machine tools, Features: The invention comprises a central shaft body (1), wherein an inner sealing cover (2) is installed inside the central shaft body (1), a first sealing ring (7) is installed at the inner end of the inner sealing cover (2), a first retaining ring (5) is installed at the rear end of the first sealing ring (7), a first bearing (3) is installed inside the first retaining ring (5), and the first bearing (3) is matched with the inner sealing cover (2); A second sealing ring (8) is installed on the rear side of the first bearing (3), a plurality of second bearings (9) are installed at the rear end of the second sealing ring (8), a second retaining spring (6) is installed at the rear end of the second bearing (9), a rotating shaft (4) is installed inside the second retaining spring (6), and the rotating shaft (4) passes through the second bearing (9) and the first bearing (3).

2. A high-speed rotary joint for a CNC machine tool according to claim 1, Features: The front end of the inner sealing cover (2) is provided with a plurality of through holes, and the rear end of the inner sealing cover (2) is fixedly connected with a convex tube, and the convex tube is compatible with the first sealing ring (7) and the first retaining spring (5).

3. A high-speed rotary joint for a CNC machine tool according to claim 1, Features: A plurality of balls are installed inside the first bearing (3), an inner ring is installed inside the balls, and the inner ring is matched with the rotating shaft (4).

4. A high-speed rotary joint for a CNC machine tool according to claim 2, Features: The front end of the rotating shaft (4) is rotatably connected to a connecting shaft, and the rear end of the rotating shaft (4) is rotatably connected to a connecting ring.

5. A high-speed rotary joint for a CNC machine tool according to claim 1, Features: The front end of the second bearing (9) is rotatably connected to a plurality of balls arranged at equal distances, and the front end of the balls is rotatably connected to a disc.

6. A high-speed rotary joint for a CNC machine tool according to claim 2, Features: The inner sealing cover (2) is threadedly connected to the central shaft body (1).

7. A high-speed rotary joint for a CNC machine tool according to claim 4, Features: The rotating shaft (4) is threadedly connected to the central shaft body (1).

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