Main shaft self-sealing structure of machine tool tailstock

Abstract

The utility model relates to the field of machine tool components, in particular to a main shaft self-sealing structure of a machine tool tailstock. The main shaft self-sealing structure of the machine tool tailstock comprises the tailstock, a main shaft is installed on the inner wall of the tailstock, a plurality of bearings are installed between the main shaft and the inner wall of the tailstock and used for supporting radial force of the main shaft, one end of the main shaft is sleeved with an air bag, the air bag is expanded and deformed by compressing the air bag, and sealing between the main shaft and the tailstock is achieved. Wherein one end of an inner ring of one bearing is symmetrically and fixedly connected with a first clamping block, the outer wall of the main shaft is sleeved with a first blocking ring, and one side, close to the bearings, of the first blocking ring is provided with a first clamping groove, according to the main shaft self-sealing structure of the machine tool tailstock, the machining precision of a machine tool is improved, the service life of the machine tool is prolonged, and the maintenance cost is reduced; the working efficiency is improved; the novel sealing structure has wide application prospects, can be widely applied to various kinds of machine tool equipment, and brings a positive promotion effect on development of the machine tool industry.

Description

Technical Field

[0001] The utility model relates to the field of machine tool components, in particular to a spindle self-sealing structure of a tailstock of a machine tool. Background Art

[0002] In the field of machine tool processing, the spindle is a key component of the machine tool tailstock. Its stability and sealing directly affect the processing accuracy and service life of the machine tool. The traditional machine tool tailstock spindle sealing structure usually adopts mechanical seals or packing seals, but these methods often have some problems in practical applications.

[0003] Although mechanical seals have good sealing effects, they are complex in structure, difficult to install and maintain, and require high precision on the spindle. Once there is a slight deviation or dynamic load change on the spindle, the seal may fail. In addition, the friction pair of the mechanical seal is prone to wear and heat when rotating at high speed, further affecting the sealing effect and the stability of the spindle.

[0004] Although the packing seal has a simple structure, its sealing effect is poor, it is prone to leakage, and the packing needs to be replaced regularly, which has a high maintenance cost. At the same time, the packing seal also causes great wear on the main shaft, reducing the service life of the main shaft.

[0005] Therefore, it is necessary to design a new self-sealing structure for the tailstock spindle of a machine tool to solve the problems existing in the traditional sealing method; this new structure should have the characteristics of simple structure, easy installation, good sealing effect, wear resistance, and long service life, and be able to adapt to the needs of high-speed rotation and complex working environment of machine tools. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a spindle self-sealing structure for a tailstock of a machine tool.

[0007] The utility model provides a spindle self-sealing structure for a machine tool tailstock, comprising a tailstock, a spindle mounted on the inner wall of the tailstock, a plurality of bearings mounted between the spindle and the inner wall of the tailstock, the plurality of bearings being used to support the radial force of the spindle, an air bag being sleeved on one end of the spindle, and the air bag being compressed to expand and deform, thereby achieving sealing between the spindle and the tailstock.

[0008] Preferably, one end of the inner ring of one of the bearings is symmetrically fixedly connected with a first clamping block, the outer wall of the main shaft is sleeved with a first blocking ring, a first clamping groove is opened on the side of the first blocking ring close to the bearing, the first clamping block is engaged with the first clamping groove, one end of the main shaft is sleeved with a blocking ring, the inner side of the blocking ring is symmetrically fixedly connected with a second clamping block, the outer wall of the main shaft located on the other side of the airbag is sleeved with a second blocking ring, a second blocking ring is symmetrically opened on the side close to the blocking ring, the second clamping groove is engaged with the second clamping block, and the blocking ring is fixedly connected to the tail stock by a plurality of groups of bolts.

[0009] Preferably, the outer wall sleeve of the main shaft is provided with a magnetic fluid sealing device, which is mainly composed of a magnetic fluid, a magnet ring, a pole piece and a magnetically conductive shaft or sleeve. The magnetic fluid is a special liquid containing magnetic particles, which can form a stable chain structure under the action of a magnetic field, thereby giving the fluid magnetism. The magnet ring is used to generate a strong magnetic field so that the magnetic fluid can be firmly adsorbed around the shaft or sleeve.

[0010] Preferably, a sealing ring is sleeved between the blocking ring and the tailstock.

[0011] Preferably, the airbag is made of a synthetic rubber material that is resistant to high pressure and wear, and is provided with a pressure sensor inside the airbag for real-time monitoring of the expansion degree and internal pressure of the airbag to ensure the stability of the sealing effect.

[0012] Preferably, the first blocking ring and the second blocking ring are both made of high-strength aluminum alloy to increase the friction coefficient between the bearing and the main shaft, thereby ensuring the stability of the engagement.

[0013] Preferably, the plurality of bearings installed between the main shaft and the inner wall of the tailstock are high-precision angular contact ball bearings to ensure the stability and precision of the main shaft when rotating at high speed.

[0014] Compared with the related art, the spindle self-sealing structure of the tailstock of the machine tool provided by the utility model has the following beneficial effects:

[0015] Firstly, by adopting the airbag seal method, this structure realizes efficient, stable and reliable sealing between the spindle and the inner wall of the tailstock; this sealing method can not only effectively prevent the leakage of lubricating oil or other working media, but also adapt to the needs of machine tools under high-speed rotation and complex working environments; compared with traditional mechanical seals or packing seals, airbag seals have the advantages of simple structure, easy installation, wear resistance, long service life, etc., which significantly reduces maintenance costs;

[0016] Secondly, this structure also combines magnetic fluid sealing technology to further enhance the sealing effect; the magnetic fluid sealing equipment uses the characteristics of the magnetic field and magnetic fluid to form a uniform liquid film on the surface of the spindle, effectively preventing the leakage of lubricating oil; this sealing method does not require external power, is wear-free, and can adapt to the rotation speed and slight deviation of the spindle, ensuring that it can provide efficient sealing effect under any working conditions;

[0017] In addition, the structure also adopts a special snap-fit ​​and fixed connection method to ensure the stable connection between the components and the durability of the sealing effect; the snap-fit ​​between the first blocking ring and the second blocking ring and the bearing and the spindle, as well as the bolted fixed connection between the blocking ring and the tailstock, all enhance the stability and reliability of the entire sealing structure;

[0018] To sum up, the spindle self-sealing structure of the tailstock of the machine tool proposed in the utility model not only improves the machining accuracy and service life of the machine tool, but also reduces the maintenance cost and improves the work efficiency; this new sealing structure has broad application prospects and can be widely used in various types of machine tools and equipment, bringing positive impetus to the development of the machine tool industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the spindle self-sealing structure of the tailstock of a machine tool provided by the utility model;

[0020] Figure 2 for Figure 1 The schematic diagram of the structure of the partial cross-section shown;

[0021] Figure 3 for Figure 1 The schematic diagram of the structure of the main shaft shown;

[0022] Figure 4 for Figure 1 The structural schematic diagram of the blocking ring shown;

[0023] Figure 5 for Figure 1 A schematic structural diagram of a first blocking ring and a second blocking ring is shown.

[0024] Numbers in the figure: 1, tailstock; 2, spindle; 3, bearing; 4, airbag; 5, first clamping block; 6, first blocking ring; 7, first clamping groove; 8, blocking ring; 9, second clamping block; 10, second blocking ring; 11, second clamping groove; 12, sealing ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0027] See also Figure 1-5A spindle self-sealing structure of a machine tool tailstock, the spindle self-sealing structure of the machine tool tailstock comprising: a tailstock 1, a spindle 2 is installed on the inner wall of the tailstock 1, a plurality of bearings 3 are installed between the spindle 2 and the inner wall of the tailstock 1, the plurality of bearings 3 are used to support the radial force of the spindle 2, an airbag 4 is sleeved on one end of the spindle 2, the airbag 4 is compressed to expand and deform, so as to achieve sealing between the spindle 2 and the tailstock 1, the airbag 4 is made of a synthetic rubber material that is resistant to high pressure and wear, and a pressure sensor is arranged inside the airbag 4 for real-time monitoring of the expansion degree and internal pressure of the airbag 4 to ensure the stability of the sealing effect, the plurality of bearings 3 installed between the spindle 2 and the inner wall of the tailstock 1 are high-precision angular contact ball bearings to ensure the stability and precision of the spindle 2 when rotating at high speed.

[0028] See also Figure 2-5 One end of the inner ring of one of the bearings 3 is symmetrically fixedly connected with a first clamping block 5, the outer wall of the main shaft 2 is sleeved with a first blocking ring 6, and the first blocking ring 6 is provided with a first groove 7 on the side close to the bearing 3, and the first clamping block 5 is engaged with the first groove 7, one end of the main shaft 2 is sleeved with a blocking ring 8, and the inner side of the blocking ring 8 is symmetrically fixedly connected with a second clamping block 9, the outer wall of the main shaft 2 is located on the other side of the airbag 4 and is sleeved with a second blocking ring 10, and the second blocking ring 10 is symmetrically provided with a second groove 11 on the side close to the blocking ring 8, and the second groove 11 is engaged with the second clamping block 9, the blocking ring 8 is fixedly connected to the tail stock 1 by several groups of bolts, and a sealing ring 12 is sleeved between the blocking ring 8 and the tail stock 1, and the first blocking ring 6 and the second blocking ring 10 are made of high-strength aluminum alloy to increase the friction coefficient between the bearing 3 and the main shaft 2, thereby ensuring the stability of the engagement.

[0029] See also Figure 2-3 The outer wall of the main shaft 2 is provided with a magnetic fluid sealing device, which is mainly composed of a magnetic fluid, a magnet ring, a pole piece and a magnetically conductive shaft or sleeve. The magnetic fluid is a special liquid containing magnetic particles. These particles can form a stable chain structure under the action of a magnetic field, thereby giving the fluid magnetism. The magnet ring is used to generate a strong magnetic field so that the magnetic fluid can be firmly adsorbed around the shaft or sleeve.

[0030] The working principle of the spindle self-sealing structure of the machine tool tailstock provided by the utility model is as follows:

[0031] First, the spindle 2 is installed in the inner wall of the tailstock 1 and supported by a number of bearings 3; these bearings 3, especially the high-precision angular contact ball bearings 3, provide the spindle 2 with necessary radial support to ensure that the spindle 2 can maintain stability and accuracy when rotating at high speed;

[0032] An airbag 4 is sleeved on one end of the spindle 2; when the airbag 4 is compressed, it expands and deforms, and fits tightly between the spindle 2 and the inner wall of the tailstock 1 to form a sealed barrier; this sealing method can effectively prevent the leakage of lubricating oil or other working media; in addition, the airbag 4 is made of a synthetic rubber material that is resistant to high pressure and wear, which ensures its stability and durability under long-term use and high-load conditions; at the same time, the pressure sensor arranged inside the airbag 4 can monitor the expansion degree and internal pressure of the airbag 4 in real time, thereby ensuring the stability of the sealing effect;

[0033] In order to enhance the stability and reliability of the sealing structure, a magnetic fluid sealing device is also provided on the outer wall of the main shaft 2; this device utilizes the characteristics of the magnetic field and the magnetic fluid to form a uniform liquid film on the surface of the main shaft 2, further preventing the leakage of the lubricating oil; the magnetic fluid sealing device does not require external power, is wear-free, and can adapt to the rotation speed and slight deviation of the main shaft 2, ensuring that it can provide an efficient sealing effect under any working conditions;

[0034] In addition, in order to ensure the stability of the airbag 4 between the bearing 3 and the spindle 2, a first clamping block 5 is symmetrically fixedly connected to one end of the inner ring of one of the bearings 3, and a first clamping groove 7 matching the first clamping block 5 is provided on the first blocking ring 6 sleeved on the outer wall of the spindle 2; in this way, the engagement of the first clamping block 5 and the first clamping groove 7 can ensure the stable position of the bearing 3 on the spindle 2; similarly, a second clamping block 9 is also fixed on the inner side of the blocking ring 8, which is engaged with the second clamping groove 11 on the second blocking ring 10, thereby fixing the position of the blocking ring 8; the blocking ring 8 is fixedly connected to the tailstock 1 by bolts, which further enhances the stability of the entire sealing structure;

[0035] Finally, in order to further improve the sealing effect, a sealing ring is also provided between the plugging ring 8 and the tailstock 1; 12 this sealing ring can fill the small gap between the plugging ring 8 and the tailstock 1 to prevent the lubricating oil from leaking from these gaps;

[0036] In summary, the self-sealing structure of the spindle 2 of the tailstock 1 of the machine tool realizes efficient, stable and reliable sealing between the spindle 2 and the inner wall of the tailstock 1 through the support of the bearing 3, the sealing of the airbag 4, the reinforcement of the magnetic fluid sealing device, and the snap-fit ​​and fixed connection between the components; this structure not only improves the operating efficiency of the machine tool, but also extends the service life of the spindle 2 and the bearing 3.

[0037] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A spindle self-sealing structure for a machine tool tailstock, characterized in that: include: A tailstock (1) is provided with a main shaft (2) mounted on the inner wall of the tailstock (1), a plurality of bearings (3) are mounted between the main shaft (2) and the inner wall of the tailstock (1), the plurality of bearings (3) being used to support the radial force of the main shaft (2), an air bag (4) being sleeved on one end of the main shaft (2), and the air bag (4) is compressed to expand and deform, thereby achieving sealing between the main shaft (2) and the tailstock (1).

2. The spindle self-sealing structure of the tailstock of a machine tool according to claim 1, characterized in that: One end of the inner ring of one of the bearings (3) is symmetrically fixedly connected with a first clamping block (5); the outer wall of the main shaft (2) is sleeved with a first blocking ring (6); a first clamping groove (7) is provided on a side of the first blocking ring (6) close to the bearing (3); the first clamping block (5) is engaged with the first clamping groove (7); one end of the main shaft (2) is sleeved with a blocking ring (8); a second clamping block (9) is symmetrically fixedly connected to the inner side of the blocking ring (8); the outer wall of the main shaft (2) is sleeved with a second blocking ring (10) on the other side of the airbag (4); a second clamping groove (11) is symmetrically provided on a side of the second blocking ring (10) close to the blocking ring (8); the second clamping groove (11) is engaged with the second clamping block (9); the blocking ring (8) is fixedly connected to the tailstock (1) by a plurality of sets of bolts.

3. The spindle self-sealing structure of the tailstock of a machine tool according to claim 1, characterized in that: The outer wall of the main shaft (2) is sleeved with a magnetic fluid sealing device.

4. The spindle self-sealing structure of the tailstock of a machine tool according to claim 2, characterized in that: A sealing ring (12) is sleeved between the blocking ring (8) and the tailstock (1).

5. The spindle self-sealing structure of the tailstock of a machine tool according to claim 1, characterized in that: The airbag (4) is made of a synthetic rubber material that is resistant to high pressure and wear, and is provided with a pressure sensor inside the airbag for real-time monitoring of the expansion degree and internal pressure of the airbag (4) to ensure the stability of the sealing effect.

6. The spindle self-sealing structure of the tailstock of a machine tool according to claim 2, characterized in that: The first blocking ring (6) and the second blocking ring (10) are both made of high-strength aluminum alloy to increase the friction coefficient between the bearing (3) and the main shaft (2), thereby ensuring the stability of the engagement.

7. The spindle self-sealing structure of the tailstock of a machine tool according to claim 1, characterized in that: The plurality of bearings (3) installed between the main shaft (2) and the inner wall of the tailstock (1) are high-precision angular contact ball bearings, so as to ensure the stability and precision of the main shaft (2) when rotating at high speed.

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