A dual speed drill box

Abstract

The utility model discloses a double -speed drill box relates to the transmission technical field of drilling equipment, including front casing and rear casing, the side of front casing away from rear casing is equipped with mechanical seal casing, the rotation sleeve is set up on the axle in the inside of mechanical seal casing, two static rings and a dynamic ring are installed between the cooperation of axle and the inside of mechanical seal casing, mechanical seal casing is connected with front casing through bolt, and is intercommunicated through hydraulic motor valve plate and liquid distribution board, and front casing is connected with rear casing through positioning pin and bolt and dismounts connection, when the second spur gear of hydraulic motor is driven to rotate through the first spur gear, the axle of second spur gear installation rotates, and the dynamic ring realizes the coaxial rotation through the set screw and rotation axle, and the static ring is installed in the inside of bearing box, realizes the sealing through O ring and the inside of box, and the alloy wear -resistant insert of dynamic ring both sides and the alloy wear -resistant insert of static ring contact, and through the wave spring of dynamic ring inside increases the pre -tightening force, thereby realizes the end face sealing of static ring and dynamic ring.

Description

Technical Field

[0001] This utility model specifically relates to the field of transmission technology for drilling equipment, and more specifically to a dual-speed drill box. Background Technology

[0002] As the core transmission component of drilling equipment, the performance of the drill box directly affects drilling accuracy, operating efficiency and equipment service life; traditional drill boxes have many defects in structural design and practical application. Firstly, the sealing performance is poor. Traditional drill boxes often use ordinary oil seals between the rotating shaft and the box body. The oil seal material is mostly rubber, which is prone to failure due to wear and aging after long-term use, resulting in lubricating oil leakage. At the same time, external dust and moisture can easily enter the box body through the sealing gaps, causing corrosion and wear of gears, bearings and other components, reducing transmission accuracy, and even causing malfunctions and shutdowns. The sealing failure problem is more prominent under harsh working conditions, and the equipment maintenance frequency increases significantly. Secondly, the speed adjustment is limited. Traditional drill boxes mostly adopt a single speed design or adjust the speed by replacing gear pairs, which cannot meet the working conditions of different workpiece materials and different drilling depths. When replacing gear pairs, the entire drill box structure needs to be disassembled, which is cumbersome and time-consuming. Moreover, the replacement process can easily lead to gear positioning deviation, affecting transmission stability. The single speed design limits drilling efficiency and processing quality. When dealing with workpieces with high hardness, the drill bit is prone to wear too quickly, while the efficiency is low when dealing with softer workpieces. The structure is inconvenient to assemble and maintain; the traditional drill box is mostly an integral structure, and the installation, debugging and maintenance of internal gears, bearings and other components require disassembling the entire box, which is a complicated process; in addition, the oil and water circuits are scattered and the interface connections are chaotic, which can easily lead to problems such as oil circuit leakage and water circuit blockage, increasing the difficulty and cost of maintenance. Utility Model Content

[0003] The purpose of this invention is to provide a dual-speed drill box. In this device, a mechanical seal structure with two stationary rings and one moving ring is adopted. The moving ring and the stationary ring are sealed by alloy wear-resistant inserts and O-ring gap sealing, which greatly improves the sealing reliability and effectively prevents lubricating oil leakage and external impurities from entering. The alloy wear-resistant inserts have high hardness and strong wear resistance, and the contact parts of the rotating sleeve are ceramic-plated, which further extends the service life of the sealing structure, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A dual-speed drill housing includes a front housing and a rear housing; a mechanical seal housing is provided on the side of the front housing away from the rear housing; a rotating sleeve is provided on a shaft inside the mechanical seal housing; two stationary rings and one rotating ring are fitted between the shaft and the inside of the mechanical seal housing; the mechanical seal housing is connected to the front housing by bolts and communicates with a liquid distribution plate through a hydraulic motor valve plate; the sealing joint between the shaft and the stationary rings is ceramic-plated to achieve long service life and wear resistance. The front housing is equipped with a collision valve, a front bearing, and a second spur gear; the front housing is detachably connected to the rear housing via a positioning pin and bolts.

[0005] As a further technical solution of this utility model, the rear housing is provided with a rear gear and a first spur gear, and has an internal oil passage that is interconnected with the collision valve on the front housing; the reduction ratio between the first spur gear and the second spur gear is 1:4.

[0006] As a further technical solution of this utility model, a hydraulic motor is fixedly installed on the side of the rear housing away from the front housing; the bottom of the hydraulic motor is fixedly installed with the hydraulic motor valve plate; the hydraulic motor valve plate is connected to the manifold plate through a rigid pipe; the manifold plate is fixedly installed at the bottom of the rear housing.

[0007] As a further technical solution of this utility model, the first spur gear is fixedly installed on the output shaft of the hydraulic motor; the bottom of the first spur gear is meshed with the second spur gear.

[0008] As a further technical solution of this utility model, the second spur gear is fixedly installed at one end of the shaft; the end of the shaft away from the second spur gear extends to the outside of the mechanical seal housing; and a drill sleeve is installed in cooperation with it; a valve plate is also fixedly installed at the bottom of the mechanical seal housing.

[0009] As a further technical solution of this utility model, a rotating sleeve is installed between the drill bushing and the shaft; the shaft is installed with the inner walls of the front housing and the rear housing respectively through a front bearing and a rear bearing.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. In use, when the hydraulic motor drives the second spur gear to rotate through the first spur gear, the rotating ring rotates coaxially with the rotating shaft through the set bolt when the shaft on which the second spur gear is mounted rotates. The stationary ring is installed inside the bearing housing and is sealed to the inside of the housing through the O-ring. At the same time, the alloy wear-resistant inserts on both sides of the rotating ring contact the alloy wear-resistant inserts of the stationary ring, and the preload is increased by the wave spring inside the rotating ring, thereby achieving end face sealing between the stationary ring and the rotating ring. 2. In this utility model, the manifold plate is provided with an oil circuit interface, a water circuit interface, and a pilot tube interface. It is connected to the rear housing by bolts and to the hydraulic motor valve plate at the rear end by a rigid pipe. The hydraulic motor valve plate is connected to the hydraulic motor by bolts to achieve oil circuit interconnection. The mechanical seal housing is connected to the front housing by bolts and to the liquid distribution plate by a valve plate to achieve water circuit interconnection. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This utility model Figure 1 Bottom view.

[0013] Figure 3 This utility model Figure 2 Another perspective structural diagram.

[0014] Figure 4 This utility model Figure 1 The main view.

[0015] Figure 5 This utility model Figure 4 Sectional view of AA.

[0016] Figure 6 This is a split diagram of the present invention.

[0017] Figure 7 This utility model Figure 1 Side view.

[0018] Figure 8 This utility model Figure 7 BB section view.

[0019] In the diagram: 1-Hydraulic motor, 2-Hydraulic motor valve plate, 3-Manifold plate, 4-Dispensing plate, 5-Drill bushing, 6-Collision valve, 7-Front housing, 8-Rear housing, 9-Valve plate, 10-Front end bearing, 11-Rear end bearing, 12-Lock nut, 13-Stop washer, 14-Second spur gear, 15-Rotating sleeve, 16-Shaft, 17-Stationary ring, 18-Rotating ring, 19-Mechanical seal housing, 20-First spur gear. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-8 In this embodiment of the utility model, a dual-speed drill box includes a front housing 7 and a rear housing 8; a mechanical seal housing 19 is provided on the side of the front housing 7 away from the rear housing 8; a rotating sleeve 15 is provided on the shaft 16 inside the mechanical seal housing 19; two stationary rings 17 and one rotating ring 18 are fitted between the shaft 16 and the inside of the mechanical seal housing 19; the mechanical seal housing 19 is connected to the front housing 7 by bolts and communicates with the liquid distribution plate 4 through the hydraulic motor valve plate 2. The front housing 7 is provided with a collision valve 6, a front bearing 10, and a second spur gear 14; the front housing 7 is detachably connected to the rear housing 8 by a positioning pin and bolts. The rear housing 8 is provided with a rear gear and a first spur gear 20, and has an internal oil passage that is interconnected with the collision valve 6 on the front housing 7; the reduction ratio between the first spur gear 20 and the second spur gear 14 is 1:4.

[0022] By adopting the above technical solution, when the hydraulic motor 1 drives the second spur gear 14 to rotate through the first spur gear 20, the shaft on which the second spur gear 14 is mounted rotates. The rotating ring 18 rotates coaxially with the rotating shaft through the set bolt. The stationary ring is installed inside the bearing housing and is sealed to the inside of the housing through the O-ring. At the same time, the alloy wear-resistant inserts on both sides of the rotating ring 18 contact the alloy wear-resistant inserts of the stationary ring 17, and the preload is increased by the wave spring inside the rotating ring 18, thereby achieving end face sealing between the stationary ring 17 and the rotating ring 18.

[0023] In this embodiment, a hydraulic motor 1 is fixedly installed on the side of the rear housing 8 away from the front housing 7; the bottom of the hydraulic motor 1 is fixedly installed with the hydraulic motor valve plate 2; the hydraulic motor valve plate 2 is connected to the manifold plate 3 through a rigid pipe; the manifold plate 3 is fixedly installed at the bottom of the rear housing 8. In this embodiment, the first spur gear 20 is fixedly mounted on the output shaft of the hydraulic motor 1; the bottom of the first spur gear 20 is meshed with the second spur gear 14. By adopting the above technical solution, the manifold 3 is provided with an oil circuit interface, a water circuit interface, and a pilot tube interface. It is connected to the rear housing 8 by bolts and to the hydraulic motor valve plate 2 at the rear end by a rigid pipe. The hydraulic motor valve plate is connected to the hydraulic motor 1 by bolts to realize oil circuit interconnection. The mechanical seal housing 19 is connected to the front housing 7 by bolts and to the liquid distribution plate 4 by the valve plate 9 to realize water circuit interconnection.

[0024] Furthermore, the second spur gear 14 is fixedly installed at one end of the shaft 16; the end of the shaft 16 away from the second spur gear 14 extends to the outside of the mechanical seal housing 19; and a drill sleeve 5 is installed therein; a valve plate 9 is also fixedly installed at the bottom of the mechanical seal housing 19. In this embodiment, a rotating sleeve 15 is installed between the drill sleeve 5 and the shaft; the shaft is installed with the inner walls of the front housing 7 and the rear housing 8 respectively through the front bearing 10 and the rear bearing 11. By adopting the above technical solution, the liquid distribution plate 4 is equipped with 6 sets of pipes and joints to realize the interconnection of water, oil and manifold plate 3.

[0025] The working principle of this utility model is as follows: When the hydraulic motor 1 drives the second spur gear 14 to rotate through the first spur gear 20, the shaft on which the second spur gear 14 is mounted rotates. The rotating ring 18 rotates coaxially with the rotating shaft through the set bolt. The stationary ring is installed inside the bearing housing and is sealed with the inside of the housing through the O-ring. At the same time, the alloy wear-resistant inserts on both sides of the rotating ring 18 contact the alloy wear-resistant inserts of the stationary ring 17, and the preload is increased by the wave spring inside the rotating ring 18, thereby achieving end face sealing between the stationary ring 17 and the rotating ring 18. The manifold 3 is equipped with an oil circuit interface, a water circuit interface, and a pilot tube interface. It is connected to the rear housing 8 by bolts and to the hydraulic motor valve plate 2 at the rear end by a rigid pipe. The hydraulic motor valve plate is connected to the hydraulic motor 1 by bolts to achieve oil circuit interconnection. The mechanical seal housing 19 is connected to the front housing 7 by bolts and to the liquid distribution plate 4 by valve plate 9 to achieve water circuit interconnection.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-speed drill box, characterized in that: It includes a front housing (7) and a rear housing (8); a mechanical seal housing (19) is provided on the side of the front housing (7) away from the rear housing (8); a rotating sleeve (15) is provided on the shaft (16) inside the mechanical seal housing (19); two stationary rings (17) and one rotating ring (18) are fitted between the shaft (16) and the inside of the mechanical seal housing (19); the mechanical seal housing (19) is connected to the front housing (7) by bolts and communicates with the liquid distribution plate (4) through the hydraulic motor valve plate (2); The front housing (7) is provided with a collision valve (6), a front bearing (10), and a second spur gear (14); the front housing (7) is detachably connected to the rear housing (8) by a positioning pin and bolts.

2. The dual-speed drill box according to claim 1, characterized in that: The rear housing (8) is provided with a rear gear and a first spur gear (20), and has an internal oil passage that is interconnected with the collision valve (6) on the front housing (7); the reduction ratio between the first spur gear (20) and the second spur gear (14) is 1:

4.

3. A dual-speed drill box according to claim 2, characterized in that: A hydraulic motor (1) is fixedly installed on the side of the rear housing (8) away from the front housing (7); the bottom of the hydraulic motor (1) is fixedly installed with the hydraulic motor valve plate (2); the hydraulic motor valve plate (2) is connected to the manifold plate (3) through a rigid pipe; the manifold plate (3) is fixedly installed at the bottom of the rear housing (8).

4. A dual-speed drill box according to claim 3, characterized in that: The first spur gear (20) is fixedly mounted on the output shaft of the hydraulic motor (1); the bottom of the first spur gear (20) is meshed with the second spur gear (14).

5. A dual-speed drill box according to claim 4, characterized in that: The second spur gear (14) is fixedly installed at one end of the shaft (16); the end of the shaft (16) away from the second spur gear (14) extends to the outside of the mechanical seal housing (19); and a drill sleeve (5) is installed in cooperation with it; a valve plate (9) is also fixedly installed at the bottom of the mechanical seal housing (19).

6. A dual-speed drill box according to claim 5, characterized in that: The drill bushing (5) is fitted with a rotating sleeve (15) between itself and the shaft; the shaft is fitted with the inner walls of the front housing (7) and the rear housing (8) respectively through the front bearing (10) and the rear bearing (11).

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