Gearbox high-low speed shifting structure of gun drill

Abstract

The utility model discloses a kind of high-low speed gear shifting structure of gun drill gear box, specifically related to gear shifting technical field, including shell, the inner wall of shell is fixedly connected with electric cylinder, the output end of electric cylinder is fixedly connected with shaft sleeve, the inner wall of shaft sleeve is equipped with switching component, switching component includes: linkage shaft, rotation is installed in the inner wall of shaft sleeve, the outer wall of linkage shaft and close to its one end portion is fixedly connected with first pinion;First gear wheel, meshing transmission connection is on the outer wall of first pinion, the inner wall of first gear wheel is fixedly connected with connecting shaft, and one end portion of connecting shaft is equipped with high-speed motor.The utility model adopts switching component, when needing high speed gear drive, by starting electric cylinder, first pinion and first gear wheel are separated, high-speed motor drives connecting shaft to rotate, connecting shaft drives first gear wheel to rotate, and high-speed gear drive is directly and quickly driven by high-speed motor.

Description

Technical Field

[0001] This utility model relates to the field of gear shifting technology, and more specifically, to a high-low speed shifting structure for a gun drill gearbox. Background Technology

[0002] The high-low speed shifting structure of the gun drill gearbox is a core design for improving drilling efficiency and adaptability in machining. Its core purpose is reflected in the fact that the high speed can increase the cutting speed and reduce the contact time between the material and the tool per unit time, thereby reducing the accumulation of cutting heat and avoiding material softening or tool sticking. The low speed reduces the rotational speed but increases the torque, which can provide stronger cutting force.

[0003] During the high-low speed shifting process of the gun drill gearbox, there will still be meshing of various gears to achieve the switching between high and low speeds. This makes it difficult to quickly and directly switch from low speed to high speed, resulting in low shifting efficiency and low high-low speed shifting speed of the gun drill gearbox. Utility Model Content

[0004] To overcome the aforementioned deficiencies of the prior art, this utility model provides the following technical solution: a high-low speed shifting structure for a gun drill gearbox, comprising a housing, an electric cylinder fixedly connected to the inner wall of the housing, a bushing fixedly connected to the output end of the electric cylinder, and a switching assembly provided on the inner wall of the bushing, the switching assembly comprising:

[0005] A linkage shaft is rotatably mounted on the inner wall of a bushing, and a first pinion is fixedly connected to the outer wall of the linkage shaft near one end thereon.

[0006] The first large gear is meshed and connected to the outer wall of the first small gear. A connecting shaft is fixedly connected to the inner wall of the first large gear. A high-speed motor is installed at one end of the connecting shaft. The outer wall of the high-speed motor is fixedly connected to the housing. The high-speed motor is used to drive the connecting shaft to drive the first large gear to mesh and rotate.

[0007] In a preferred embodiment, a gap is provided between the first pinion and the housing, and the connecting shaft is rotatably connected to the housing.

[0008] In a preferred embodiment, a gap is provided between the linkage shaft and the inner wall of the housing, and the vertical cross-sectional shape of the bushing is annular.

[0009] In a preferred embodiment, a second large gear is fixedly connected to the outer wall of the linkage shaft and near its other end, a second small gear is meshed and driven by the outer wall of the second large gear, and a drive shaft is fixedly connected to the inner wall of the second small gear.

[0010] In a preferred embodiment, a third large gear is fixedly connected to the outer wall of the drive shaft at a position away from the second small gear, and the outer wall of the third large gear is meshed with the third small gear.

[0011] A shift shaft is fixedly connected to the inner wall of the third pinion, and a low-speed motor is fixedly installed on one side of the housing.

[0012] In a preferred embodiment, the drive shaft is rotatably connected to the housing, and the outer diameter of the third large gear is larger than the outer diameter of the third small gear.

[0013] In a preferred embodiment, the outer wall of the shift shaft is rotatably connected to the housing, and the low-speed motor is used to drive the shift shaft to rotate.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model adopts a switching component. When high-speed gear drive is required, the starting electric cylinder drives the bushing to move the linkage shaft to the right, the first small gear and the first large gear are separated, the high-speed motor drives the connecting shaft to rotate, the connecting shaft drives the first large gear to rotate, and the high-speed gear drive is directly and quickly driven by the high-speed motor.

[0016] 2. This utility model uses a shift shaft to drive the third small gear to rotate, the third small gear to drive the third large gear to mesh and rotate, the second small gear to drive the second large gear to mesh and rotate, and the linkage shaft to drive the first small gear to rotate. The first large gear is driven by multi-layer reduction and multi-stage positioning reduction, making the low-speed transmission more stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the high and low speed shifting structure of the gun drill gearbox of this utility model.

[0018] Figure 2 This is a partial structural diagram of the connection between the first pinion and the linkage shaft of this utility model.

[0019] Figure 3 This is a partial structural diagram of the connection between the connecting shaft and the first large gear of this utility model.

[0020] Figure 4 This is a partial structural diagram of the connection between the second pinion and the drive shaft of this utility model.

[0021] The attached diagram is labeled as follows: 1. Housing; 2. Electric cylinder; 3. Bushing; 4. Linkage shaft; 5. First pinion; 6. First large gear; 7. Connecting shaft; 8. High-speed motor; 9. Second large gear; 10. Second pinion; 11. Drive shaft; 12. Third large gear; 13. Third pinion; 14. Shift shaft; 15. Low-speed motor. Detailed Implementation

[0022] 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.

[0023] As attached Figure 1 - Appendix Figure 4 The diagram shows a high-low speed shifting structure for a gun drill gearbox. This high-low speed shifting structure is equipped with a switching component. The switching component is configured to drive the high-speed gear directly and quickly via a high-speed motor 8. The specific structural configuration of the switching component is as follows.

[0024] In this embodiment, as shown in the appendix Figure 1 - Appendix Figure 3 As shown, an electric cylinder 2 is fixedly connected to the inner wall of the housing 1. A bushing 3 is fixedly connected to the output end of the electric cylinder 2. A switching assembly is provided on the inner wall of the bushing 3. The switching assembly includes: a linkage shaft 4, rotatably mounted on the inner wall of the bushing 3; a first pinion 5 fixedly connected to the outer wall of the linkage shaft 4 near one end; a first large gear 6, meshing and drivingly connected to the outer wall of the first pinion 5; a connecting shaft 7 fixedly connected to the inner wall of the first large gear 6; a high-speed motor 8 installed at one end of the connecting shaft 7; the outer wall of the high-speed motor 8 is fixedly connected to the housing 1; and the high-speed motor 8 is used to drive the connecting shaft 7 to drive the first large gear 6 to mesh and rotate. There is a gap between the first pinion 5 and the housing 1, and the connecting shaft 7 is rotatably connected to the housing 1. There is a gap between the linkage shaft 4 and the inner wall of the housing 1, and the vertical cross-section of the bushing 3 is annular.

[0025] When using this technology, during high-speed and low-speed shifting of the gun drill gearbox, when high-speed drive is required, the electric cylinder 2 is activated. The electric cylinder 2 pushes the bushing 3 to move to the right, the bushing 3 drives the linkage shaft 4 to move to the right, and the linkage shaft 4 drives the first pinion 5 to move to the right. The first pinion 5 separates from the first large gear 6, so that the first pinion 5 no longer contacts the first large gear 6, thus creating a large gap between the first large gear 6 and the first pinion 5. Then, the high-speed motor 8 is supported by the housing 1, and the high-speed motor 8 drives the connecting shaft 7 to rotate. The connecting shaft 7 drives the first large gear 6 to rotate, so the connecting shaft 7 can be directly and quickly driven to the high-speed gear by the high-speed motor 8.

[0026] In this embodiment, as shown in the appendix Figure 4As shown, a second large gear 9 is fixedly connected to the outer wall of the linkage shaft 4 near its other end. A second small gear 10 is meshed and driven by the outer wall of the second large gear 9. A drive shaft 11 is fixedly connected to the inner wall of the second small gear 10. A third large gear 12 is fixedly connected to the outer wall of the drive shaft 11 at a position away from the second small gear 10. A third small gear 13 is meshed and driven by the outer wall of the third large gear 12. A shift shaft 14 is fixedly connected to the inner wall of the third small gear 13. A low-speed motor 15 is fixedly installed on one side of the housing 1. The drive shaft 11 is rotatably connected to the housing 1. The outer diameter of the third large gear 12 is larger than the outer diameter of the third small gear 13. The outer wall of the shift shaft 14 is rotatably connected to the housing 1. The low-speed motor 15 drives the shift shaft 14 to rotate.

[0027] When this technology is in use, during low-speed operation, the low-speed motor 15 drives the shift shaft 14 to rotate. The shift shaft 14 drives the third pinion 13 to rotate, the third pinion 13 drives the third large gear 12 to mesh and rotate, the third large gear 12 drives the drive shaft 11 to rotate the second pinion 10, the second pinion 10 drives the second large gear 9 to mesh and rotate, the second large gear 9 drives the linkage shaft 4 to rotate, the linkage shaft 4 drives the first pinion 5 to rotate, the first pinion 5 meshes and drives the first large gear 6 to rotate. In this way, the first large gear 6 undergoes multiple reductions, so that the first large gear 6 drives the connecting shaft 7 to rotate at a low speed. Thus, the transmission speed of the connecting shaft 7 is relatively low.

[0028] In the instruction manual, the electric cylinder 2, the high-speed motor 8, and the low-speed motor 15 are all connected in parallel with the switch. The parallel circuit is a publicly available technology. Therefore, the contents not described in detail are all existing technologies known to those skilled in the art. Furthermore, the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. As the electrical control components not mentioned in this technical solution are existing technologies, they are not shown in the figure and will not be described here.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-low speed shifting structure for a gun drill gearbox, comprising a housing (1), characterized in that: An electric cylinder (2) is fixedly connected to the inner wall of the housing (1), and a bushing (3) is fixedly connected to the output end of the electric cylinder (2). A switching assembly is provided on the inner wall of the bushing (3), and the switching assembly includes: The linkage shaft (4) is rotatably mounted on the inner wall of the bushing (3), and a first pinion (5) is fixedly connected to the outer wall of the linkage shaft (4) near one end. The first large gear (6) is meshed and connected to the outer wall of the first small gear (5). The inner wall of the first large gear (6) is fixedly connected to a connecting shaft (7). A high-speed motor (8) is installed at one end of the connecting shaft (7). The outer wall of the high-speed motor (8) is fixedly connected to the housing (1). The high-speed motor (8) is used to drive the connecting shaft (7) to drive the first large gear (6) to mesh and rotate.

2. The high-low speed shifting structure of a gun drill gearbox according to claim 1, characterized in that: A gap is provided between the first pinion (5) and the housing (1), and the connecting shaft (7) is rotatably connected to the housing (1).

3. The high-low speed shifting structure of a gun drill gearbox according to claim 1, characterized in that: The linkage shaft (4) has a gap between itself and the inner wall of the housing (1), and the vertical cross-section of the bushing (3) is annular.

4. The high-low speed shifting structure of a gun drill gearbox according to claim 1, characterized in that: The outer wall of the linkage shaft (4) and near its other end are fixedly connected to a second large gear (9), the outer wall of the second large gear (9) is meshed with a second small gear (10), and the inner wall of the second small gear (10) is fixedly connected to a drive shaft (11).

5. The high-low speed shifting structure of a gun drill gearbox according to claim 4, characterized in that: A third large gear (12) is fixedly connected to the outer wall of the drive shaft (11) at a position away from the second small gear (10), and the outer wall of the third large gear (12) is meshed with the third small gear (13). The inner wall of the third pinion (13) is fixedly connected to a shift shaft (14), and a low-speed motor (15) is fixedly installed on one side of the housing (1).

6. The high-low speed shifting structure of a gun drill gearbox according to claim 5, characterized in that: The drive shaft (11) is rotatably connected to the housing (1), and the outer diameter of the third large gear (12) is greater than the outer diameter of the third small gear (13).

7. The high-low speed shifting structure of a gun drill gearbox according to claim 5, characterized in that: The outer wall of the shift shaft (14) is rotatably connected to the housing (1), and the low-speed motor (15) is used to drive the shift shaft (14) to rotate.

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