Top drive gearbox

Abstract

The utility model relates to the technical field of gear boxes, discloses a top drive gear box, and solves the problem that a main shaft of an existing top drive gear box is inconvenient to replace. The gear box body and the main shaft can be conveniently disassembled and assembled through the fixing structure, when the main shaft is replaced, the gear box body and the washing pipe support need to be separated, at the moment, the motor is started to drive the output gear to rotate, the output gear drives the gear ring to rotate, the gear ring drives the six transmission gears to rotate at the same time, and at the moment, the screw drives the sliding block to move. The sliding block drives the fixing block to be separated from the clamping groove, then the gear box body can be separated from the upper cover, then the main shaft can be replaced by taking down an internal bearing cover, after replacement, the upper cover covers the gear box body to be driven, then the motor is started to rotate reversely, the fixing block can be clamped into the clamping groove, and the gear box body and the upper cover can be fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to a top drive gear box. Background Art

[0002] The top drive gearbox is an important equipment used in drilling operations. It is usually installed on the drilling rig to provide sufficient power and torque to drive the drill pipe for drilling operations. Its main function is to transmit the power provided by the motor to the drill pipe through the transmission, causing it to rotate and exert sufficient thrust.

[0003] Chinese patent announcement number CN218440539U discloses a top drive gearbox and a top drive device for drilling. A top drive gearbox includes a main shaft, a gearbox body and a lower sealing assembly. A receiving chamber is provided inside the gearbox body. The top and bottom ends of the gearbox body are respectively provided with an upper opening and a lower opening in the vertical direction. The lower sealing assembly is arranged in the receiving chamber and is located at the lower opening to seal the lower opening. Since the lower sealing assembly includes an upper oil seal and a lower oil cup sleeved on the main shaft, when the main shaft rotates, since there is a gap between the outer wall of the lower oil cup and the inner wall of the upper oil seal in the horizontal direction, the non-contact seal is adopted to avoid irreversible wear on the main shaft. At the same time, since the upper part of the lower oil cup and the lower part of the upper oil seal are partially reset in the vertical direction, the lubricating oil drips into the oil pool of the gearbox body along the side wall of the upper oil seal, which avoids the lubricating oil from entering between the main shaft and the lower oil cup and flowing into the lower structure of the top drive gearbox, thereby improving the sealing effect.

[0004] The above technical solution has the following defects: after long-term use, the main shaft will be damaged and need to be replaced, but when replacing the main shaft, the gear box needs to be disassembled as a whole, which will result in a lot of time and troublesome disassembly and assembly, affecting the subsequent work. Utility Model Content

[0005] The utility model aims to provide a top drive gear box. The device is adopted to work, thereby solving the problem that the existing top drive gear box is inconvenient to replace the main shaft.

[0006] To achieve the above object, the utility model provides the following technical solutions: a top drive gearbox, comprising a gearbox body, an upper cover arranged above the gearbox body, a flushing tube support arranged above the upper cover, a bearing seat arranged between the upper cover and the flushing tube support, and a main shaft rotatably connected to the inside of the gearbox body, wherein a fixing structure is arranged inside the gearbox body, and a mounting structure is arranged inside the upper cover;

[0007] The fixing structure includes a card slot opened inside the upper cover, a moving slot opened inside the gear box body, a slider is arranged inside the moving slot, a fixing block is fixed to the top of the slider, a transmission gear is arranged on one side of the moving slot, a screw is fixed on the side of the transmission gear close to the moving slot, a gear ring is arranged above the transmission gear, a motor is arranged above the gear ring, and an output gear is fixed to the rotating shaft of the motor.

[0008] Furthermore, six movable grooves are provided, and the six movable grooves are distributed at equal intervals inside the gear box body.

[0009] Furthermore, the outer diameter of the sliding block matches the inner diameter of the moving groove, and the sliding block forms a sliding structure inside the moving groove.

[0010] Furthermore, the outer diameter of the fixing block matches the inner diameter of the slot, and a locking structure is formed between the fixing block and the slot.

[0011] Furthermore, the output gear is meshedly connected with the top end of the gear ring, the transmission gear is meshedly connected with the bottom end of the gear ring, and the screw rod is threadedly connected with the slider.

[0012] Furthermore, the mounting structure includes a fixing hole opened inside the upper cover, a fixing groove opened on one side of the fixing hole, a through hole opened inside the bearing seat, a sliding groove opened on one side of the through hole, a through hole and a sliding groove opened inside the punching tube bracket, a fixing column is arranged inside the fixing hole, and a clamping block is fixed on one side of the fixing column.

[0013] Furthermore, four fixing holes are provided, and the four fixing holes are distributed at equal intervals inside the upper cover.

[0014] Furthermore, the outer diameter of the fixing column matches the inner diameter of the fixing hole, and the fixing column forms a rotating structure inside the fixing hole.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model proposes a top drive gearbox. The existing top drive gearbox is not convenient for replacing the main shaft. However, the utility model can facilitate the disassembly and assembly between the gearbox body and the main shaft through the fixed structure. When replacing the main shaft, the gearbox body and the punching pipe bracket need to be separated. At this time, the motor is started to drive the output gear to rotate, the output gear drives the gear ring to rotate, and the gear ring drives the six transmission gears to rotate at the same time. At this time, the screw drives the slider to move, and the slider drives the fixed block to separate from the slot. Then the gearbox body and the upper cover can be separated, and then the internal bearing cover can be removed to replace the main shaft. After replacement, the upper cover is covered on the gearbox body to drive, and then the motor is started to rotate in the opposite direction, so that the fixed block can be stuck in the inside of the slot, so that the gearbox body and the upper cover can be fixed.

[0017] 2. The utility model proposes a top drive gearbox, which can be easily installed between the upper cover, the flushing pipe bracket and the bearing seat through the installation structure. During installation, the through hole of the bearing seat is aligned with the fixing hole of the upper cover, and then the through hole of the flushing pipe bracket is aligned with the through hole of the bearing seat, and then the fixing column is passed through the through hole and inserted into the inside of the fixing hole. During this process, the card block slides inside the slide groove, and then rotates ninety degrees to make the card block stuck in the inside of the fixing groove. At this time, the upper cover, the flushing pipe bracket and the bearing seat can be fixed, and quick installation can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 For the utility model Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0021] Figure 4 This is a schematic diagram of the internal structure of the upper cover of the utility model;

[0022] Figure 5 For the utility model Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0023] In the figure: 1. gear box body; 2. upper cover; 3. punching tube bracket; 4. main shaft; 5. fixing structure; 51. slot; 52. gear ring; 53. motor; 531. output gear; 54. transmission gear; 541. screw; 55. moving slot; 56. slider; 561. fixing block; 6. mounting structure; 61. fixing column; 611. block; 62. through hole; 621. slide slot; 63. fixing hole; 631. fixing slot; 7. bearing seat. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0026] Combination Figure 1 and Figure 2A top drive gearbox comprises a gearbox body 1, an upper cover 2 arranged above the gearbox body 1, a flushing pipe support 3 arranged above the upper cover 2, a bearing seat 7 arranged between the upper cover 2 and the flushing pipe support 3, and a main shaft 4 rotatably connected to the inside of the gearbox body 1, a fixing structure 5 is arranged inside the gearbox body 1, and a mounting structure 6 is arranged inside the upper cover 2;

[0027] Specifically, when in use, the main shaft 4 rotates inside the gear box body 1 , and when the main shaft 4 is damaged, it is only necessary to remove the upper cover 2 and the bearing cover inside the gear box body 1 .

[0028] The utility model is further described below in conjunction with embodiments.

[0029] Embodiment 1:

[0030] See also Figure 2 and Figure 3 The fixing structure 5 includes a card slot 51 opened inside the upper cover 2, a moving slot 55 is opened inside the gear box body 1, a slider 56 is arranged inside the moving slot 55, a fixing block 561 is fixed to the top of the slider 56, a transmission gear 54 is arranged on one side of the moving slot 55, a screw 541 is fixed on the side of the transmission gear 54 close to the moving slot 55, a gear ring 52 is arranged above the transmission gear 54, a motor 53 is arranged above the gear ring 52, an output gear 531 is fixed to the rotating shaft of the motor 53, and the moving slot There are six movable grooves 55, which are evenly spaced inside the gearbox body 1. The outer diameter of the slider 56 matches the inner diameter of the movable groove 55. The slider 56 forms a sliding structure inside the movable groove 55. The outer diameter of the fixed block 561 matches the inner diameter of the card slot 51. The fixed block 561 and the card slot 51 form a card engagement structure. The output gear 531 is meshed with the top end of the ring gear 52, the transmission gear 54 is meshed with the bottom end of the ring gear 52, and the screw 541 is threadedly connected to the slider 56.

[0031] Specifically, when replacing the main shaft 4, the gear box body 1 and the upper cover 2 need to be separated. At this time, the starting motor 53 drives the output gear 531 to rotate, and the output gear 531 drives the ring gear 52 to rotate, and the ring gear 52 drives the six transmission gears 54 to rotate at the same time. At this time, the screw 541 drives the slider 56 to move, and the slider 56 drives the fixing block 561 to separate from the slot 51, and then the gear box body 1 and the upper cover 2 can be separated, and then the internal bearing cover can be removed to replace the main shaft 4. The design structure of the detachable main shaft 4 enables the main shaft 4 to be replaced in time when the main shaft 4 is damaged, and the replacement is more convenient and quick, saving time. After replacement, the upper cover 2 is covered on the gear box body 1 to drive it, and then the motor 53 is started to rotate in the opposite direction, so that the fixing block 561 can be stuck into the inside of the slot 51, so that the gear box body 1 and the upper cover 2 can be fixed.

[0032] Embodiment 2:

[0033] See also Figure 4 and Figure 5 The mounting structure 6 includes a fixing hole 63 provided inside the upper cover 2, a fixing groove 631 provided on one side of the fixing hole 63, a through hole 62 provided inside the bearing seat 7, a slide groove 621 provided on one side of the through hole 62, a through hole 62 and a slide groove 621 provided inside the punching tube bracket 3, a fixing column 61 provided inside the fixing hole 63, a block 611 fixed on one side of the fixing column 61, four fixing holes 63 are provided, and the four fixing holes 63 are evenly spaced inside the upper cover 2, the outer diameter of the fixing column 61 matches the inner diameter of the fixing hole 63, and the fixing column 61 forms a rotating structure inside the fixing hole 63.

[0034] Specifically, during installation, align the through hole 62 of the bearing seat 7 with the fixing hole 63 of the upper cover 2, then align the through hole 62 of the flushing tube bracket 3 with the through hole 62 of the bearing seat 7, and then pass the fixing column 61 through the through hole 62 and insert it into the fixing hole 63. During this process, the block 611 slides inside the slide groove 621, and then rotates ninety degrees to allow the block 611 to be inserted into the fixing groove 631. At this time, the upper cover 2, the flushing tube bracket 3 and the bearing seat 7 can be fixed, so that quick installation can be achieved.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A top drive gearbox, comprising a gearbox body (1), an upper cover (2) arranged above the gearbox body (1), a flushing tube support (3) arranged above the upper cover (2), a bearing seat (7) arranged between the upper cover (2) and the flushing tube support (3), and a main shaft (4) rotatably connected to the inside of the gearbox body (1), characterized in that: The gearbox body (1) is provided with a fixing structure (5) inside, and the upper cover (2) is provided with a mounting structure (6) inside; The fixing structure (5) comprises a slot (51) provided inside the upper cover (2); a movable slot (55) is provided inside the gear box body (1); a slider (56) is provided inside the movable slot (55); a fixing block (561) is fixed to the top of the slider (56); a transmission gear (54) is provided on one side of the movable slot (55); a screw rod (541) is fixed on the side of the transmission gear (54) close to the movable slot (55); a gear ring (52) is provided above the transmission gear (54); a motor (53) is provided above the gear ring (52); and an output gear (531) is fixed to the rotating shaft of the motor (53).

2. A top drive gearbox according to claim 1, characterized in that: Six movable grooves (55) are provided, and the six movable grooves (55) are distributed at equal intervals inside the gear box body (1).

3. A top drive gearbox according to claim 2, characterized in that: The outer diameter of the slider (56) matches the inner diameter of the moving groove (55), and the slider (56) forms a sliding structure inside the moving groove (55).

4. A top drive gearbox according to claim 1, characterized in that: The outer diameter of the fixing block (561) matches the inner diameter of the clamping slot (51), and a clamping structure is formed between the fixing block (561) and the clamping slot (51).

5. A top drive gearbox according to claim 1, characterized in that: The output gear (531) is meshedly connected with the top end of the gear ring (52), the transmission gear (54) is meshedly connected with the bottom end of the gear ring (52), and the screw rod (541) is threadedly connected with the slider (56).

6. A top drive gearbox according to claim 1, characterized in that: The mounting structure (6) comprises a fixing hole (63) provided inside the upper cover (2), a fixing groove (631) provided on one side of the fixing hole (63), a through hole (62) provided inside the bearing seat (7), a slide groove (621) provided on one side of the through hole (62), a through hole (62) and a slide groove (621) provided inside the flushing tube bracket (3), a fixing column (61) provided inside the fixing hole (63), and a clamping block (611) fixed on one side of the fixing column (61).

7. A top drive gearbox according to claim 6, characterized in that: Four fixing holes (63) are provided, and the four fixing holes (63) are distributed at equal intervals inside the upper cover (2).

8. A top drive gearbox according to claim 7, characterized in that: The outer diameter of the fixing column (61) matches the inner diameter of the fixing hole (63), and the fixing column (61) forms a rotating structure inside the fixing hole (63).

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