Dustproof tailstock for laser cladding

Abstract

The utility model relates to the technical field of laser cladding equipment, and particularly discloses a dustproof tailstock for laser cladding, which comprises a main body, a sleeve and a screw rod, the telescopic sleeve is arranged in the main body, an end cover is arranged at one end of the main body, the screw rod is connected with the end cover through a bearing, and a bearing cover connected with the screw rod is sleeved on the outer side of a shaft sleeve. The end of the lead screw is provided with a hand wheel, the end of the sleeve is fixedly provided with a nut seat matched with the lead screw, the sleeve is sleeved with a second sealing ring fixed to the end of the body, the end of the second sealing ring is provided with a downward-pressing first scraping ring, the first scraping ring is pressed on the outer wall of the sleeve, and the end, away from the hand wheel, of the lead screw is fixedly provided with a third sealing ring. The end of the third sealing ring is connected with a second scraping ring which is warped upwards, the second scraping ring is pressed on the inner wall of the sleeve, and first sealing rings are arranged between the end cover and the main body and between the bearing cover and the end cover. Dust is prevented from entering the main body, the telescopic fluency of the sleeve is ensured, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cladding equipment, in particular to a dust-proof tailstock for laser cladding. Background Technique

[0002] Laser cladding is a new surface modification technology. It forms a metallurgical-bonded filler cladding layer on the surface of the base material by adding a cladding material on the surface of the base material and using a high-energy-density laser beam to melt and solidify it together with a thin layer of the base material surface.

[0003] At present, the tailstocks commonly used in the laser cladding industry on the market are derived from lathe tailstocks. The application conditions of lathes are high speed, cutting fluid, and iron filings, and their sealing performance requirements are not high. However, during powder-fed laser cladding, the powder particle size is 15 - 300 μm and floats in the surrounding air. In this working condition, the problems are as follows: 1) When the telescopic sleeve retracts, small particle powders adsorbed on the outer wall of the sleeve drill into the gaps of the tailstock body, wearing the inner wall of the body, resulting in an increase in the telescopic resistance; 2) The powders floating in the air enter the interior through the inner hole of the telescopic sleeve and are adsorbed on the internal lead screw, causing the lead screw nut to lock, and ultimately the telescopic sleeve cannot be telescoped. Content of the Utility Model

[0004] In view of the above-mentioned deficiencies of the existing technology, the utility model provides a dust-proof tailstock for laser cladding, and sealing structures are arranged between the main body and the sleeve, between the lead screw and the sleeve, and at the end of the main body, so as to prevent dust from entering the main body, avoid wear between the sleeve and the main body, prevent locking between the lead screw and the nut seat, ensure the smoothness of the telescopic movement of the sleeve, and improve the service life.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A dust-proof tailstock for laser cladding, comprising a main body, a sleeve, and a lead screw. A telescopic sleeve is arranged inside the main body, and an end cover is arranged at one end of the main body. The lead screw is connected to the end cover through a bearing, and a bearing cover connected to the lead screw is sleeved outside the shaft sleeve. A handwheel is arranged at the end of the lead screw, and a nut seat cooperating with the lead screw is fixed at the end of the sleeve. A second sealing ring fixed to the end of the main body is sleeved outside the sleeve. A first scraping ring is arranged at the end of the second sealing ring and presses on the outer wall of the sleeve. A third sealing ring is fixed at the end of the lead screw away from the handwheel, and an upturned second scraping ring is connected to the end of the third sealing ring and presses on the inner wall of the sleeve. First sealing rings are arranged between the end cover and the main body and between the bearing cover and the end cover.

[0007] Preferably, a fixing ring is connected to the end of the main body through bolts. The fixing ring is sleeved outside the second sealing ring, and a clamping groove for fixing the second sealing ring is arranged on the inner wall of the fixing ring.

[0008] Preferably, an installation ring is connected to the end of the lead screw through a bolt. The third sealing ring is sleeved on the outer side of the installation ring. A retaining ring and a pressing ring for fixing the third sealing ring are respectively arranged at both ends of the installation ring. The pressing ring is connected to the installation ring through a bolt.

[0009] Preferably, both the first scraping ring and the second scraping ring are elastic.

[0010] Preferably, the first sealing ring is an "O"-shaped sealing ring.

[0011] Preferably, an air inlet hole is provided on the side wall of the main body. The air inlet hole is externally connected to a gas source. A ventilation hole communicating the main body with the sleeve is provided on the nut seat.

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

[0013] 1. A sealing structure is provided between the main body and the sleeve, between the lead screw and the sleeve, and at the end of the main body of the present utility model, thereby preventing dust from entering the main body, avoiding wear between the sleeve and the main body, preventing jamming between the lead screw and the nut seat, ensuring the smoothness of the telescopic movement of the sleeve, and improving the service life.

[0014] 2. Both the first scraping ring and the second scraping ring of the present utility model are elastic and are pressed under elastic force to improve the sealing performance. At the same time, the first scraping ring can scrape off the dust adsorbed on the outer wall of the sleeve, and the second scraping ring can scrape off the dust adsorbed on the inner wall of the sleeve, improving the dust removal and sealing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is Figure 1 an enlarged structural diagram of part A of

[0017] Figure 3 is Figure 1 an enlarged structural diagram of part B of

[0018] Figure 4 is a schematic structural diagram of the nut seat;

[0019] In the figure: 1 - main body; 101 - air inlet hole; 102 - end cover; 103 - bearing cover; 104 - first sealing ring; 2 - sleeve; 3 - nut seat; 301 - ventilation hole; 4 - lead screw; 5 - fixing ring; 501 - clamping groove; 6 - second sealing ring; 601 - first scraping ring; 7 - third sealing ring; 701 - second scraping ring; 8 - pressing ring; 9 - installation ring; 901 - retaining ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figure 1 shown, a dust-proof tailstock for laser cladding includes a main body 1, a sleeve 2 and a lead screw 4. A telescopic sleeve 2 is provided inside the main body 1. An end cover 102 is provided at one end of the main body 1. The lead screw 4 is connected to the end cover 102 through a bearing. A bearing cover 103 connected to the lead screw 4 is sleeved outside the shaft sleeve. The bearing cover 103 is in threaded cooperation and fixed with the lead screw 4. A handwheel is provided at the end of the lead screw 4. A nut seat cooperating with the lead screw 4 is fixed at the end of the sleeve 2. By rotating the lead screw 4 with the handwheel, the lead screw 4 cooperates through the nut seat 3, thereby driving the sleeve 2 to move back and forth.

[0022] As Figure 2 shown, in order to prevent dust from entering the inside of the main body 1, a second sealing ring 6 fixed to the end of the main body 1 is sleeved outside the sleeve 2. A first scraping ring 601 pressed downward is provided at the end of the second sealing ring 6. The first scraping ring 601 presses on the outer wall of the sleeve 2 to achieve the seal between the end of the main body 1 and the sleeve 2 and prevent dust from entering between the sleeve 2 and the main body 1.

[0023] As Figure 3 shown, a third sealing ring 7 is fixed at the end of the lead screw 4 away from the handwheel. An upwardly warped second scraping ring 701 is connected to the end of the third sealing ring 7. The second scraping ring 701 presses on the inner wall of the sleeve 2 to prevent dust from entering between the lead screw 4 and the sleeve 2 and achieve the seal between the lead screw 4 and the sleeve 2.

[0024] Both the first scraping ring 601 and the second scraping ring 701 are elastic and are pressed tightly under the elastic force to ensure the sealing effect. At the same time, the first scraping ring 601 can scrape off the dust adsorbed on the outer wall of the sleeve 2, and the second scraping ring 701 can scrape off the dust adsorbed on the inner wall of the sleeve 2.

[0025] First sealing rings 104 are provided between the end cover 102 and the main body 1 and between the bearing cover 103 and the end cover 102. The first sealing rings 104 are "O"-shaped sealing rings to prevent dust from entering the inside of the main body 1.

[0026] Among them, a fixing ring 5 is connected to the end of the main body 1 through bolts. The fixing ring 5 is sleeved outside the second sealing ring 6. A clamping groove 501 for fixing the second sealing ring 6 is provided on the inner wall of the fixing ring 5 to achieve the fixation of the second sealing ring 6.

[0027] The end of the lead screw 4 is connected with an installation ring 9 through bolts. The third sealing ring 7 is sleeved on the outer side of the installation ring 9. The two ends of the installation ring 9 are respectively provided with a retaining ring 901 and a pressing ring 8 for fixing the third sealing ring 7, ensuring the firmness of the third sealing ring 7 during use and preventing the third sealing ring 7 from being taken away when the sleeve 2 moves back and forth. In addition, the pressing ring 8 is connected with the installation ring 9 through bolts, thus facilitating the replacement of the third sealing ring 7.

[0028] In order to further prevent dust from entering the main body 1, an air inlet hole 101 is provided on the side wall of the main body 1. The air inlet hole 101 is externally connected to a gas source to introduce gas into the main body 1, so that a positive pressure is formed inside the main body 1, and the pressure is about 0.4 MPa. Due to leakage, the gas can be continuously introduced to ensure the positive pressure state inside the main body, as Figure 4 shown, a ventilation hole 301 communicating the main body 1 with the sleeve 2 is provided on the nut seat 3, so that the internal pressure of the sleeve 2 is balanced. Under the action of the positive pressure, it is difficult for external dust to enter.

[0029] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these changes and modifications.

Claims

1. A dust-proof tailstock for laser cladding, comprising a main body, a sleeve and a lead screw. A telescopic sleeve is provided inside the main body, and an end cover is provided at one end of the main body. The lead screw is connected to the end cover through a bearing, a bearing cover connected to the lead screw is sleeved outside the shaft sleeve, a handwheel is provided at the end of the lead screw, and a nut seat matched with the lead screw is fixed at the end of the sleeve. It is characterized in that: A second sealing ring fixed to the end of the main body is sleeved outside the sleeve. A first scraping ring pressed downward is provided at the end of the second sealing ring. The first scraping ring presses against the outer wall of the sleeve. A third sealing ring is fixed to the end of the screw rod away from the handwheel. An upturned second scraping ring is connected to the end of the third sealing ring. The second scraping ring presses against the inner wall of the sleeve. A first sealing ring is provided between the end cover and the main body and between the bearing cover and the end cover.

2. The dust-proof tailstock for laser cladding according to claim 1, wherein: A fixing ring is connected to the end of the main body by bolts. The fixing ring is sleeved outside the second sealing ring. A clamping groove for fixing the second sealing ring is provided on the inner wall of the fixing ring.

3. A dust-proof tailstock for laser cladding according to claim 1, characterized in that: An installation ring is connected to the end of the screw rod by bolts. The third sealing ring is sleeved outside the installation ring. A retaining ring and a pressing ring for fixing the third sealing ring are respectively provided at both ends of the installation ring. The pressing ring is connected to the installation ring by bolts.

4. The dust-proof tailstock for laser cladding according to claim 1, characterized in that: Both the first scraping ring and the second scraping ring are elastic.

5. The dust-proof tailstock for laser cladding according to claim 1, wherein: The first sealing ring is an "O"-shaped sealing ring.

6. The dust-proof tailstock for laser cladding according to claim 1, characterized in that: An air inlet hole is provided on the side wall of the main body. The air inlet hole is externally connected to a gas source. A ventilation hole communicating the main body with the sleeve is provided on the nut seat.

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