Numerical control gantry machine tool vertical shaft screw bearing cooling structure

Abstract

The utility model relates to a numerical control planer -type machine tool vertical axis screw bearing cooling structure relates to numerical control machine tool design technical field, including bearing one and bearing two for supporting screw, bearing one and bearing two outside are provided with circulating oil cavity, and circulating oil cavity is connected at the input and output end of oil cooling machine respectively. The application utilizes bearing one and bearing two to realize the support and rotation limit of screw, and when more heat is generated on bearing one and bearing two, the application makes oil circulate under the action of circulating oil cavity through the action of oil cooling machine, that is, the oil is discharged from circulating oil cavity after entering circulating oil cavity, and the oil is input into circulating oil cavity after temperature reduction treatment by oil cooling machine, so that the external oil cooling equipment can be used to realize the rapid cooling of bearing one and bearing two, thereby solving the problem that the heat generation of screw spindle and the heat generation of the rest shaft are unbalanced, which affects the precision of the machine tool.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool design technology, specifically to a cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine. Background Technology

[0002] With the rapid development of industry, CNC gantry machine tools are becoming increasingly important in industries such as new energy vehicles, aerospace, and wind power. The vertical axis of the gantry machine tool needs to perform high-speed reciprocating motion, and the heat generated by the lead screw bearing is much greater than that of the bearings of other axes. If this heat is not handled, it will have a significant impact on the accuracy of the machine tool.

[0003] For example, the patent document with application number 201721508061.4 discloses the spindle structure of the hydrodynamic bearing of the centerless grinder, and specifically discloses how to improve the structure to achieve smooth spindle movement, so as to ensure high rotational accuracy and control the heat generation of the spindle.

[0004] In the above technical solutions, the only way to control the heat generation of the spindle is to improve the smoothness of the spindle movement. This can only initially ensure the smoothness of the spindle movement. However, in the existing technology, the heat generation of the lead screw spindle and the heat generation of the other axes are unbalanced. This heat imbalance can easily lead to a loss of accuracy, thereby affecting the accuracy of machine tool production. Utility Model Content

[0005] The technical problem solved by this utility model is to address the issue that, in the prior art, the heat generation of the lead screw spindle is unbalanced with the heat generation of other shafts, which affects the production accuracy of machine tools.

[0006] This utility model can be achieved through the following technical solution: a cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine, including a bearing one and a bearing two for supporting the lead screw, and a circulating oil chamber for cooling the oil is provided on the outside of the bearing one and the bearing two, respectively connected to the input end and the output end of the oil cooler.

[0007] A further technical improvement of this utility model is that: a bearing is fixedly mounted on a motor base, and a power motor for driving the lead screw is provided on the motor base.

[0008] A further technical improvement of this utility model is that the second bearing is fixedly installed on the bearing housing.

[0009] A further technical improvement of this utility model is that: the motor base is provided with a connector one for connecting to the output end of the oil cooler, and the motor base is provided with a connector two for connecting to the input end of the oil cooler. Connector one and connector two are respectively connected to the input end and the output end of the circulating oil chamber.

[0010] A further technical improvement of this utility model is that: the bearing housing is provided with a connector three for connecting to the output end of the oil cooler, and the bearing housing is provided with a connector four for connecting to the input end of the oil cooler; connector three and connector four are respectively connected to the input end and the output end of the circulating oil chamber.

[0011] A further technical improvement of this utility model is that the connector and the input end of the circulating oil chamber are connected through a purification pipe, and the purification pipe is equipped with an impurity filter for purifying the oil.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In use, this application utilizes bearing one and bearing two to support and limit the rotation of the lead screw. When the lead screw generates a lot of heat on bearing one and bearing two, this application uses an oil cooler to circulate the oil in the circulating oil chamber. That is, the oil enters the circulating oil chamber and then exits from the circulating oil chamber. The circulating oil is cooled by the oil cooler and then reintroduced into the circulating oil chamber. This allows for rapid cooling of bearing one and bearing two using external oil cooling equipment, thereby solving the problem in the prior art where the heat generation of the lead screw spindle is unbalanced with the heat generation of other axes, which affects the accuracy of the machine tool.

[0014] 2. This application utilizes a purification pipe at the input end of the connector and the circulating oil chamber to intercept the oil using an impurity screen, thereby achieving further purification of the oil. The shape of the purification pipe helps to block and collect impurities in the oil. Furthermore, the separate purification pipe facilitates replacement, ensuring the working environment of the bearing and further guaranteeing the working accuracy of the machine tool. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram showing the relative positions of bearing one and bearing two of this utility model;

[0017] Figure 2 This is a schematic diagram of the connector position of this utility model;

[0018] Figure 3 This is a schematic diagram of the purification pipe structure of this utility model.

[0019] In the diagram: 1. Connector 1; 2. Connector 2; 3. Connector 3; 4. Connector 4; 5. Motor base; 6. Bearing 1; 7. Bearing housing; 8. Bearing 2; 9. Lead screw; 10. Purification pipe; 11. Inclined surface; 12. Impurity screen. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] Please see Figure 1-3 As shown, a cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine includes a motor base 5 and a bearing base 7, wherein the motor base 5 and the bearing base 7 are respectively fixedly installed at a fixed location. In this application, the motor base 5 and the bearing base 7 are fixed to the slide saddle by screws, and there is a certain distance between the motor base 5 and the bearing base 7 for the installation of the lead screw 9.

[0022] Specifically, a bearing 6 is fixedly installed on the motor base 5, and a bearing 8 is fixedly installed on the bearing base 7. A lead screw 9 is installed between the bearing 6 and the bearing 8, and the lead screw 9 is fixedly installed at the output end of the power motor. In use, the power motor drives the lead screw 9 to rotate, so that the lead screw 9 rotates on the bearing 6 and the bearing 8. The bearing 6 and the bearing 8 are used to achieve the stability of the lead screw 9 during rotation.

[0023] Furthermore, a circulating oil chamber is provided inside the motor base 5, which has an oil outlet and an oil inlet. Circulating oil enters from the oil inlet and flows out from the oil outlet to cool the bearing 6. Therefore, in this application, connector 1 is fixed to the oil inlet of the motor base 5 by a threaded connection, and connector 2 is fixed to the oil outlet of the motor base 5 by a threaded connection. The external circulation device is used to circulate the oil, so that the oil can cool the bearing 6. At the same time, the circulating oil can carry away impurities generated at the bearing position and enter the circulating oil chamber after purification treatment, thereby ensuring the working accuracy of the bearing position.

[0024] Furthermore, in this application, connector 3 is fixed to the oil inlet of bearing housing 7 by threaded connection, and connector 4 is fixed to the oil outlet of bearing housing 7 by threaded connection. Therefore, in this application, a circulating oil chamber is also provided on bearing housing 7. The circulating oil chamber is provided with an oil outlet and an oil inlet. In this embodiment, the oil is circulated by an external circulation device, so that the oil can cool bearing 8. At the same time, the circulating oil can carry away impurities generated at the bearing position, and the circulating oil is purified before entering the circulating oil chamber, thereby ensuring the working accuracy of the bearing position.

[0025] As a further embodiment of this application, connector 1 and connector 3 are connected, and connector 2 and connector 4 are connected. In use, the oil cooler can directly enter the interior of bearing 6 through connector 1, and at the same time, the oil enters the interior of bearing 8, so that the oil entry time is consistent, and the bearings 6 and 8 can be cooled at the same time to ensure the temperature stability of bearings 6 and 8.

[0026] In this application, the external circulation equipment includes an oil cooler and a purifier. The oil cooler is used to cool the oil. Oil coolers are common machines on the market and are a common type of existing equipment. The purifier is a common type of oil purification machine, which is a machine used to perform online purification treatment on oils (lubricating oil, hydraulic oil, etc.) in industrial lubrication systems.

[0027] As a further embodiment of this application, a purification pipe 10 is also provided between the connector 1 and the oil inlet. The purification pipe 10 is used to filter out any impurities that may remain in the oil, so as to prevent impurities from entering the bearing 6 and affecting the accuracy of the bearing 6.

[0028] Therefore, in this application, the purification tube 10 includes a tube body, which is U-shaped. An inclined surface 11 is provided at the bottom of the purification tube 10, and an impurity screen 12 is provided on the inclined surface 11. The impurity screen 12 is provided on the cross-section of the purification tube 10. If there are impurities in the oil, the impurities are blocked by the impurity screen 12. If the oil is not in a working state, the oil in the purification tube 10 is stationary. At this time, the impurities fall down along the inclined surface 11 and fall into the interior of the purification tube 10. By replacing the purification tube 10, the accuracy of the bearing 6 can be guaranteed.

[0029] In use, this utility model utilizes a motor base 5 and a bearing base 7 fixedly mounted on a slide saddle. The relative rotation of the lead screw 9 is achieved through bearing 6 and bearing 8. During use, a power motor drives the lead screw 9 to rotate. In this process, cooling cavities are directly cast around bearing 6 and bearing 8 on the periphery of the motor base 5 and bearing base 7. When the lead screw 9 rotates, the cooling functions of bearing 6 and bearing 8 are activated simultaneously. The oil cooler presses cooling oil into the cooling cavities through connector 1 on the motor base 5 and connector 3 on the bearing base 7, cooling bearing 6 and bearing 8 separately. After the cooling oil circulates through the two cooling cavities, it returns to the oil cooler through connector 2 on the motor base 5 and connector 4 on the bearing base 7, achieving the effect of circulating cooling of the vertical shaft bearing.

[0030] In the above technical solution, after the cooling oil is pumped out by the oil cooler, it is divided into two paths through a three-way connector. One path enters the circulating oil chamber in the motor housing 5 through connector 1 to cool the bearing 6. After circulation, it flows into the oil cooler through connector 2. At the same time, the other path of cooling oil enters the interior of connector 3 through connector 1. Then, the cooling oil enters the circulating oil chamber in the bearing housing 7 through connector 3 to cool the bearing 8. After circulation, it returns to the position of connector 3 through connector 4, thus flowing back into the oil cooler.

[0031] Furthermore, in this application, an impurity screen 12 is provided on the inclined surface 11. The impurity screen 12 is set on the cross-section of the purification tube 10. If there are impurities in the oil, the impurities are blocked by the impurity screen 12. If the oil is not in operation, the oil in the purification tube 10 is stationary. At this time, the impurities fall down along the inclined surface 11 and fall into the interior of the purification tube 10. With the replacement of the purification tube 10, the accuracy of the bearing 6 is guaranteed.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine, comprising a first bearing (6) and a second bearing (8) for supporting the lead screw (9), characterized in that: The bearings 1 (6) and 2 (8) are provided with circulating oil chambers for oil cooling, which are respectively connected to the input and output ends of the oil cooler.

2. The cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine according to claim 1, characterized in that, The bearing 1 (6) is fixedly mounted on the motor base (5), and the motor base (5) is provided with a power motor for driving the lead screw (9).

3. The cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine according to claim 1, characterized in that, The bearing 2 (8) is fixedly installed on the bearing housing (7).

4. The cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine according to claim 2, characterized in that, The motor base (5) is provided with a connector 1 (1) for connecting to the output end of the oil cooler, and the motor base (5) is provided with a connector 2 (2) for connecting to the input end of the oil cooler. The connector 1 (1) and connector 2 (2) are respectively connected to the input end and the output end of the circulating oil chamber.

5. The cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine according to claim 3, characterized in that, The bearing housing (7) is provided with a connector three (3) for connecting to the output end of the oil cooler, and the bearing housing (7) is provided with a connector four (4) for connecting to the input end of the oil cooler; the connector three (3) and the connector four (4) are respectively connected to the input end and the output end of the circulating oil chamber.

6. The cooling structure for the vertical axis lead screw bearing of a CNC gantry milling machine according to claim 4, characterized in that, The connector (1) and the input end of the circulating oil chamber are connected by a purification pipe (10), and the purification pipe (10) is provided with an impurity filter (12) for purifying the oil.

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