Three-stage transmission device of drilling machine

Abstract

The utility model relates to a three-stage transmission device of a drilling machine, which comprises a motor, a transmission shaft and a transmission shaft, the transmission seat is arranged at the end part of the motor and is inserted into the speed reduction cavity; the gear ring is arranged on the transmission seat; the primary planet carrier is movably arranged in the gear ring; the first-stage planet gear is rotationally arranged on the first-stage planet carrier and is meshed with the gear ring; the first-stage sun gear is arranged on the motor and is meshed with the first-stage planet gear; the second-stage planet carrier and the first-stage planet carrier are oppositely arranged; the second-stage planet gear is rotationally arranged on the second-stage planet carrier and is meshed with the gear ring; the second-stage sun gear is arranged on the first-stage planet carrier and is meshed with the second-stage planet gear; the fixed seat is arranged on one side of the transmission seat; the driving shaft is arranged on the secondary planet carrier and is rotationally connected with the fixed seat; the driving bevel gear is arranged on the driving shaft and meshed with the driven bevel gear, and the driven bevel gear is connected with a transmission shaft of the drilling machine. The transmission device can improve output torque, and is small in size and compact in structure.

Description

Technical Field

[0001] This utility model relates to a rail drilling machine, and more particularly to a three-stage transmission device for the drilling machine. Background Technology

[0002] Rail drilling machines often use speed reducers for transmission. For example, CN210523866U discloses a transmission mechanism for a rail drilling machine, which includes a drive shaft fixedly connected to the output shaft of a motor. The drive shaft is connected to a transmission rod via a planetary gear assembly and a bevel gear assembly. One end of the transmission rod is connected to the drill bit. The planetary gear assembly includes a sun gear fixedly connected to the bottom end of the drive shaft, which meshes with planetary gears. A planet carrier is fitted around the center of each planetary gear, and the bottom of the planet carrier is fixedly connected to the bevel gear assembly. This transmission mechanism uses a single-stage transmission, resulting in relatively low output torque, a large size, and a non-compact structure. Utility Model Content

[0003] To address the issues of low output torque, large size, and non-compact structure mentioned above, this utility model provides a three-stage transmission device for a drilling machine. The specific technical solution is as follows:

[0004] A three-stage transmission device for a drilling machine includes: a motor with a reduction chamber at one end; a transmission seat located at the end of the motor and inserted into the reduction chamber; a gear ring located on the transmission seat; a primary planetary carrier movably located within the gear ring; primary planetary gears rotatably located on the primary planetary carrier and meshing with the gear ring; a primary sun gear located on the motor and meshing with the primary planetary gears; a secondary planetary carrier opposite to the primary planetary carrier; secondary planetary gears rotatably located on the secondary planetary carrier and meshing with the gear ring; a secondary sun gear located on the primary planetary carrier and meshing with the secondary planetary gears; a fixed seat located on one side of the transmission seat for fixing the transmission seat to the motor; a drive shaft located on the secondary planetary carrier and rotatably connected to the fixed seat; a driving bevel gear located on the drive shaft; and a driven bevel gear meshing with the driving bevel gear and connected to the transmission shaft of the drilling machine.

[0005] Preferably, the transmission seat is provided with a transmission hole and a plurality of positioning grooves communicating with the transmission hole; the outer circumference of the gear ring is provided with a plurality of positioning blocks for inserting into the positioning grooves.

[0006] Preferably, the first-stage planetary gears are provided in four parts.

[0007] Preferably, the secondary planetary gears are provided in four parts.

[0008] Preferably, it further includes a bearing, which is disposed between the drive shaft and the transmission seat.

[0009] Preferably, the secondary planetary carrier is provided with a drive hole, and the drive shaft is inserted into the drive hole.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The present invention provides a three-stage transmission device for a drilling machine, which combines two planetary gears together through a gear ring to form a two-stage transmission, and then cooperates with the driving bevel gear and the driven bevel gear to form a three-stage transmission. This not only improves the output torque, but also has a small size and compact structure. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of this application;

[0013] Figure 2 It is a 3D diagram of the hidden part of the structure;

[0014] Figure 3 It is an assembly of a motor, planetary gears, drive shaft, and drive bevel gear;

[0015] Figure 4 yes Figure 3 A sectional view;

[0016] Figure 5 It is an assembly diagram of the transmission base, drive shaft and planetary gears;

[0017] Figure 6 yes Figure 5 A sectional view;

[0018] Figure 7 This is a three-dimensional diagram of a planetary gear from the first perspective;

[0019] Figure 8 This is a two-dimensional view of the planetary gears from a second perspective;

[0020] Figure 9 This is a front view of a planetary gear;

[0021] Figure 10 yes Figure 8 A schematic diagram showing the concealed gear ring and secondary planetary carrier;

[0022] Figure 11 This is an exploded view of a planetary gear;

[0023] Figure 12 This is a structural diagram of a drilling machine;

[0024] Figure 13 This is a cross-sectional view of a drilling machine. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] like Figures 1 to 13 As shown, a three-stage transmission device for a drilling machine includes a motor 1, a transmission base 2, a gear ring 31, a first-stage planetary carrier 32, a first-stage planetary gear 34, a first-stage sun gear 30, a second-stage planetary carrier 35, a second-stage sun gear 38, a second-stage planetary gear 37, a fixed base 13, a drive shaft 4, a driving bevel gear 5, and a driven bevel gear 6. One end of the motor 1 has a reduction chamber 11, and the end of the motor shaft 11 is connected to the first-stage sun gear 30. The transmission base 2 has a transmission hole 21, and the transmission base 2 is fixed to the end of the motor 1 and inserted into the reduction chamber 11. The gear ring 31 is installed in the transmission hole 21 and meshes with the first-stage planetary gear 34. The first-stage planetary gear 34 also meshes with the first-stage sun gear 30. The first-stage planetary gear 34 is rotatably mounted on the first-stage planetary carrier 32 via a first-stage rotating shaft 33. The first-stage planetary carrier 32 is movably located inside the gear ring 31. The second-stage planetary carrier 35 is arranged opposite to the first-stage planetary carrier 32 and has a second-stage rotating shaft 36. The second-stage planetary gear 37 is rotatably mounted on the second-stage rotating shaft 36. On the drive shaft 36, the secondary planetary gear 37 also meshes with the gear ring 31; the secondary sun gear 38 is fixed on the primary planetary carrier 32 and meshes with the secondary planetary gear 37; the fixed seat 13 is installed on one side of the transmission seat 2 and is connected to the motor 1 by screws. The fixed seat 13 is used to fix the transmission seat 2 on the motor 1; the drive shaft 4 is installed on the secondary planetary carrier 35 and is rotatably connected to the fixed seat 13. The end of the drive shaft 4 is equipped with a driving bevel gear 5, which meshes with the driven bevel gear 6. The driven bevel gear is fixed on the drive shaft 7 of the drilling machine. The number of teeth of the driving bevel gear 5 is less than the number of teeth of the driven bevel gear 6, so as to realize the speed reduction transmission and thus realize the three-stage transmission.

[0027] Two planetary gears are combined by a gear ring 31 to form a two-stage transmission. Then, two bevel gears are used for further speed reduction to form a three-stage transmission structure. The overall structure is more compact and the output torque is increased. At the same time, the length of the drive shaft 4 can be effectively shortened, improving stability and reliability.

[0028] To facilitate installation and fix the gear ring 31, the transmission base 2 is provided with several positioning grooves 22 that communicate with the transmission hole 21; the outer circular surface of the gear ring 31 is provided with several positioning blocks 311, which are inserted into the positioning grooves 22. The positioning blocks 311 and the positioning grooves 22 correspond one-to-one, and the positioning blocks 311 and the positioning grooves 22 are arranged in a circular array.

[0029] There are four primary planetary gears 34 and four secondary planetary gears 37 arranged in a circular array. The four planetary gears can improve strength and make the force evenly distributed.

[0030] The drive shaft 4 is connected to the transmission seat 2 via a bearing 41. The drive shaft 4 is equipped with a limiting ring, which is engaged with the inner ring of the bearing 41.

[0031] A limiting sleeve 42 is also provided between the drive shaft 4 and the fixed seat 13. The limiting sleeve 42 is movably inserted on the drive shaft 4. The two ends of the limiting sleeve 42 abut against the limiting ring of the drive shaft 4 and the fixed seat 13 respectively. The limiting sleeve 42 restricts the axial position of the drive shaft 4 and prevents the drive shaft 4 from moving.

[0032] To facilitate the installation of the drive shaft, the secondary planetary carrier 35 is provided with a drive hole 351, and the drive shaft 4 is inserted into the drive hole 351.

[0033] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A three-stage transmission for a drill, characterized by, It comprises: a motor (1) provided with a reduction cavity (11) at one end; a transmission seat (2) provided at the end of the motor (1) and inserted into the reduction cavity (11); a gear ring (31) provided on the transmission seat (2); a primary planetary carrier (32) movably provided in the gear ring (31); a primary planetary gear (34) rotatably provided on the primary planetary carrier (32) and meshed with the gear ring (31); a primary sun gear (30) provided on the motor (1) and meshed with the primary planetary gear (34); a secondary planetary carrier (35) oppositely provided with the primary planetary carrier (32); a secondary planetary gear (37) rotatably provided on the secondary planetary carrier (35) and meshed with the gear ring (31); a secondary sun gear (38) provided on the primary planetary carrier (32) and meshed with the secondary planetary gear (37); a fixing seat (13) provided on one side of the transmission seat (2) for fixing the transmission seat (2) on the motor (1); a driving shaft (4) provided on the secondary planetary carrier (35) and rotatably connected with the fixing seat (13); a driving bevel gear (5) provided on the driving shaft (4); and a driven bevel gear (6) meshed with the driving bevel gear (5) and connected with a transmission shaft (7) of a drilling machine.

2. A three stage transmission for a drill as claimed in claim 1 wherein, The transmission seat (2) is provided with a transmission hole (21) and a plurality of positioning grooves (22) communicated with the transmission hole (21); The outer circumferential surface of the gear ring (31) is provided with a plurality of positioning blocks (311) inserted into the positioning grooves (22).

3. A three stage transmission for a drill as claimed in claim 1 wherein, The primary planetary gear (34) is provided with four.

4. A three stage transmission for a drill as defined in claim 1 wherein, The secondary planetary gear (37) is provided with four.

5. A three stage transmission for a drill as defined in claim 1, wherein: It further comprises: a bearing (41) provided between the driving shaft (4) and the transmission seat (2).

6. A three stage transmission for a drill as defined in claim 1 wherein, The secondary planetary carrier (35) is provided with a driving hole (351) in which the driving shaft (4) is inserted.

7. The three-stage transmission device of the drilling machine according to claim 1, wherein a limiting shaft sleeve (42) is provided between the driving shaft (4) and the fixing seat (13), and the two ends of the limiting shaft sleeve (42) are respectively abutted against a limiting ring of the driving shaft (4) and the fixing seat (13).

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