Reduction gearbox for gantry numerical control machine tool

Abstract

The utility model discloses a kind of reduction gearbox for gantry numerical control machine tool, it is related to the technical field of reduction gearbox, the utility model aims at solving the problem of machine tool reduction gearbox bulky and uneven lubrication, the utility model includes box, the top wall in the box is respectively rotationally connected with input shaft, intermediate shaft and output shaft, the top end of input shaft is connected with driving device, to be used to drive the rotation of input shaft, input gear is integrally arranged on the input shaft, the intermediate shaft is fixedly connected with gear shift gear group, the gear shift gear group is engaged with the input gear, high speed gear and low speed gear are connected with the gear shift gear group on the output shaft corresponding, gear shift oil cylinder is also connected on the intermediate shaft, to be used to drive the up-down movement of intermediate shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of gearboxes, specifically to a gearbox for a gantry CNC machine tool. Background Technology

[0002] Older machine tool gearboxes are bulky, and uneven lubrication in various parts of the gearbox leads to premature wear of high-speed gears due to insufficient lubrication. Maintenance is complex, requiring disassembly and reassembly to adjust the concentricity of multiple axes, and repairs are time-consuming, typically taking more than two hours. Utility Model Content

[0003] To address the aforementioned problems—namely, the bulky size and uneven lubrication of machine tool gearboxes—this invention proposes a gearbox for gantry CNC machine tools. The gearbox includes a housing, with an input shaft, an intermediate shaft, and an output shaft rotatably connected to the top wall of the housing. A drive device is connected to the top of the input shaft to drive its rotation. An input gear is integrally formed on the input shaft. A shift gear set is fixedly connected to the intermediate shaft, meshing with the input gear. A high-speed gear and a low-speed gear are connected to the output shaft corresponding to the shift gear set. A shift cylinder is also connected to the intermediate shaft to drive its vertical movement.

[0004] A further feature of this invention is that the shift gear assembly includes a large shift gear and a small shift gear, the large shift gear meshing with the high-speed gear, the small shift gear meshing with the low-speed gear, and the large shift gear also meshing with the input gear.

[0005] A further feature of this invention is that the shift cylinder is disposed on the outside of the housing, the output end of the shift cylinder is connected to the intermediate shaft, and a proximity switch is also installed on the output end of the shift cylinder for detecting the position of the intermediate shaft.

[0006] A further feature of this invention is that an oil filling port is provided on the housing corresponding to the high-speed gear for injecting lubricating oil into the housing, and an oil return port is also provided at the bottom of the housing.

[0007] A further feature of this invention is that the oil return port is located on the side of the input shaft opposite to the intermediate shaft.

[0008] A further feature of this invention is that an oil distribution block is connected to the outer wall of the housing, and the oil distribution block is provided with three output ports, which are respectively used to connect to each shaft bearing.

[0009] The beneficial effects of this utility model are as follows:

[0010] The integrated shift gear set with sliding mechanism allows for a more compact axial dimension within the gearbox. Installing a proximity switch at the output end of the shift cylinder ensures proper shifting and reduces shifting impact. Adding an oil distributor enables multi-point lubrication, thereby extending the equipment's lifespan. Attached Figure Description

[0011] Figure 1 A schematic diagram of the structure of this utility model is shown.

[0012] Reference numerals in the attached diagram: 1. Housing; 2. Input shaft; 21. Input gear; 3. Intermediate shaft; 4. Output shaft; 41. High-speed gear; 42. Low-speed gear; 5. Shift gear set; 51. Shift gear (large); 52. Shift gear (small); 6. Shift cylinder; 61. Proximity switch; 7. Filler port; 8. Return port; 9. Oil distributor. Detailed Implementation

[0013] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0014] This utility model proposes a gearbox for a gantry CNC machine tool, including a housing 1. An input shaft 2, an intermediate shaft 3, and an output shaft 4 are rotatably connected to the top wall of the housing 1, wherein the input shaft 2 and the output shaft 4 are respectively arranged on both sides of the intermediate shaft 3.

[0015] The top of the input shaft 2 is connected to a drive device via a coupling. The drive device is a servo motor and is bolted to the top of the outer side of the housing 1. The drive device can drive the input shaft 2 to rotate.

[0016] The input shaft 2 also has an integrated input tooth 21. The intermediate shaft 3 is fixedly connected to the shift gear set 5 by a flat key. The shift gear set 5 meshes with the input tooth 21 to drive the intermediate shaft 3 to rotate. The output shaft 4 is connected to the shift gear set 5 by a high-speed gear 41 and a low-speed gear 42. The high-speed gear 41 and the low-speed gear 42 are connected to the output shaft 4 by a connecting key. The high-speed gear 41 and the low-speed gear 42 are respectively used to mesh with the shift gear set. That is, when the high-speed gear 41 meshes with the shift gear set, it can drive the output shaft 4 to rotate at high speed. When the low-speed gear 42 meshes with the shift gear set, it can drive the output shaft 4 to rotate at low speed.

[0017] A shift cylinder 6 is also fixedly connected to the intermediate shaft 3. The shift cylinder 6 is located on the outside of the housing 1 and is fixedly connected to the top of the housing 1. The shift cylinder 6 is used to drive the intermediate shaft 3 to move up and down, thereby driving the shift gear to move up and down accordingly.

[0018] The shift gears include a large shift gear 51 and a small shift gear 52, which are fixedly connected. The large shift gear 51 is positioned above the small shift gear 52, and the high-speed gear 41 is positioned above the low-speed gear 42. When the large shift gear moves to the high-speed gear 41, it meshes with the high-speed gear 41, thereby driving the output shaft 4 to rotate. At this time, the small shift gear 52 will be in an idle state and will not mesh with any other gear. When the small shift gear is moved down to the low-speed gear 42, it meshes with the low-speed gear 42, thereby driving the output shaft 4 to rotate. At this time, the large shift gear 51 disengages from the high-speed gear 41 and will be in an idle state, not meshing with any other gear.

[0019] A proximity switch 61 is installed on the output end of the shift cylinder 6. A positioning block is set on the housing 1 corresponding to the proximity switch 61. The position of the shift gear group 5 is determined by the cooperation between the proximity switch 61 and the positioning block, thereby realizing the adjustment of high speed and low speed.

[0020] A filler port 7 is provided on the housing 1 at the position corresponding to the high-speed gear 41 for adding lubricating oil into the housing 1 to lubricate the gears inside the housing 1. The filler port 7 is located on the top of the housing 1, and an oil return port 8 is provided on the bottom of the housing 1. The lubricating oil in the housing 1 can flow back into the oil cooler through the oil return port 8 to realize the circulation of lubricating oil in the housing 1.

[0021] The oil return port 8 is located on the side of the input shaft 2 away from the intermediate shaft 3, so that the direction of the lubricating oil flow in the housing 1 can pass through all the gears, so as to achieve a better lubrication effect on the gears.

[0022] An oil distribution block 9 is also connected to the outer wall of the housing 1. The oil distribution block 9 is a four-way valve with three output ports. The three output ports on the oil distribution block 9 are connected to each bearing by the oil distribution pipe, so as to distribute the lubricant in the housing 1 to each bearing and achieve the lubrication effect of the bearing.

[0023] In summary, this invention utilizes an integrated shift gear assembly 5 for sliding shifting, resulting in a more compact axial dimension within the housing 1. Installing a proximity switch 61 at the output end of the shift cylinder 6 ensures proper shifting while reducing shifting impact. Adding an oil distribution block 9 enables multi-point lubrication, thereby extending the equipment's service life.

[0024] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0025] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0028] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A gearbox for a gantry CNC machine tool, characterized in that: The device includes a housing (1), on which an input shaft (2), an intermediate shaft (3), and an output shaft (4) are rotatably connected. A drive device is connected to the top of the input shaft (2) to drive the input shaft (2) to rotate. An input tooth (21) is integrally provided on the input shaft (2). A shift gear set (5) is fixedly connected on the intermediate shaft (3) and meshes with the input tooth (21). A high-speed gear (41) and a low-speed gear (42) are connected on the output shaft (4) corresponding to the shift gear set (5). A shift cylinder (6) is also connected on the intermediate shaft (3) to drive the intermediate shaft (3) to move up and down.

2. The gearbox for a gantry CNC machine tool according to claim 1, characterized in that: The shift gear set (5) includes a shift gear (51) and a shift gear (52). The shift gear (51) is used to mesh with the high-speed gear (41), and the shift gear (52) is used to mesh with the low-speed gear (42). The shift gear (51) also meshes with the input gear (21).

3. The gearbox for a gantry CNC machine tool according to claim 2, characterized in that: The shift cylinder (6) is located on the outside of the housing (1). The output end of the shift cylinder (6) is connected to the intermediate shaft (3). A proximity switch (61) is also installed on the output end of the shift cylinder (6) to detect the position of the intermediate shaft (3).

4. The gearbox for a gantry CNC machine tool according to claim 1, characterized in that: The housing (1) is provided with an oil filling port (7) corresponding to the high-speed gear (41) for injecting lubricating oil into the housing (1). The bottom of the housing (1) is also provided with an oil return port (8).

5. The gearbox for a gantry CNC machine tool according to claim 4, characterized in that: The oil return port (8) is located on the side of the input shaft (2) away from the intermediate shaft (3).

6. The gearbox for a gantry CNC machine tool according to claim 5, characterized in that: The outer wall of the housing (1) is also connected to an oil distribution block (9), which has three output ports, which are used to connect to each shaft bearing respectively.

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