Driving device for drilling and milling head of numerical control machine tool

Abstract

The utility model provides a numerical control machine tool drilling and milling head driving device which comprises a shell, a driving shaft and a driven shaft, a driving shaft hole and a driven shaft hole are formed in the shell respectively, the driving shaft and the driven shaft are installed in the shell and penetrate through and extend out of the driving shaft hole and the driven shaft hole respectively, and a fixing groove is formed in the end of the driving shaft. A first bevel gear is fixedly installed in the fixing groove, a coupler is fixedly installed at the end of the driven shaft, an annular groove is formed in the middle of the driven shaft, a driven shaft key is formed in the annular groove, a second bevel gear is fixed in the annular groove, a key groove is formed in the second bevel gear, and the second bevel gear is connected with the driven shaft key through the key groove. The first bevel gear and the second bevel gear are meshed and fixed, the driving shaft is fixedly sleeved with an inner supporting bush and an outer supporting bush, the inner supporting bush and the outer supporting bush are stacked and fixed, the inner supporting bush is sleeved with the outer supporting bush, the driving shaft is sleeved with a gasket, and the gasket is fixedly sleeved with a check ring.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control machine tools and relates to a driving device for a drilling and milling head of a numerical control machine tool. Background Art

[0002] CNC machine tools are automated machine tools equipped with a program control system and are commonly used for machining mechanical parts. CNC machine tools are usually equipped with a drilling and milling head drive device to process the workpiece.

[0003] A Chinese patent with publication number CN203509721U discloses a direct-drive drilling and milling head, including a spindle, a motor rotor, a motor stator, a sliding bracket, a linear feed motor magnet, a linear feed motor stator, a main support frame, a support arm and a tool chuck. The motor rotor is directly fixed on the spindle and placed in the motor stator. The motor stator is fixed in the sliding bracket. The linear feed motor magnet is embedded on the outside of the sliding bracket. The linear feed motor stator is placed on the outside of the linear feed motor magnet and embedded in the main support frame. The main support frame is connected to the support arm. The support arm and the main support frame are movably connected. The main support frame shaft is placed in the support arm, and the steering motor is placed between the main support frame shaft and the support arm.

[0004] The patent provides a direct-drive drilling and milling head with a motor assembly installed inside. The drilling and milling head is driven to work by the motor assembly installed inside. If there is a problem with the motor assembly of this structure, it needs to be disassembled and replaced, which is relatively inconvenient. Utility Model Content

[0005] The utility model aims to provide a driving device for a drilling and milling head of a numerically controlled machine tool in view of the above-mentioned problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: A CNC machine tool drilling and milling head drive device, comprising a housing, a driving shaft and a driven shaft, the housing is respectively provided with a driving shaft hole and a driven shaft hole, the driving shaft and the driven shaft are installed in the housing and are respectively penetrated and extended out of the driving shaft hole and the driven shaft hole, a fixing groove is provided at the end of the driving shaft, a first bevel gear is fixedly installed in the fixing groove, a coupling is fixedly installed at the end of the driven shaft, an annular groove is provided in the middle of the driven shaft, a driven shaft key is formed in the annular groove, a second bevel gear is fixed in the annular groove, a keyway is provided inside the second bevel gear, the second bevel gear is connected to the driven shaft key through the keyway, the first bevel gear and the second bevel gear are meshed and fixed, an inner support bushing and an outer support bushing are respectively sleeved and fixed on the outside of the driving shaft, the inner support bushing and the outer support bushing are stacked and fixed, and the outer support bushing is sleeved on the outside of the inner support bushing, a washer is sleeved on the driving shaft, and a stop ring is sleeved and fixed on the outside of the washer.

[0007] In the above-mentioned CNC machine tool drilling and milling head drive device, a bearing limiting convex body is formed on the active shaft, and a first active shaft bearing and a second active shaft bearing are respectively mounted and fixed on the active shaft on both sides of the inner support bushing and the outer support bushing, and the first active shaft bearing is in contact with the bearing limiting convex body.

[0008] In the above-mentioned CNC machine tool drilling and milling head driving device, a protective cover is fixedly installed at the connection between the driven shaft and the driven shaft hole.

[0009] In the above-mentioned CNC machine tool drilling and milling head driving device, a first driven shaft bearing and a second driven shaft bearing are respectively fixed to the driven shaft.

[0010] In the above-mentioned CNC machine tool drilling and milling head driving device, a driven shaft support bushing is sleeved and fixed on the driven shaft at the upper end of the second bevel gear.

[0011] In the above-mentioned CNC machine tool drilling and milling head driving device, a third driving shaft bearing is sleeved and fixed at the connection between the driving shaft and the driving shaft hole.

[0012] Compared with the prior art, the drilling and milling head drive device for a CNC machine tool provided by the utility model has the following beneficial effects: 1. Through the arrangement of a driving shaft and a driven shaft, the driving shaft and the driven shaft are connected through a first bevel gear and a second bevel gear, and a coupling is arranged at the end of the driven shaft so that the driven shaft can be connected to an external motor shaft, thereby driving the utility model, and when a motor fails, it can be replaced more conveniently; 2. By sleeved an inner support bushing and an outer support bushing on the driving shaft, and sleeved a driven shaft support bushing on the driven shaft, and by the arrangement of a protective cover body and a plurality of bearings, the stability of the internal structure of the utility model is effectively guaranteed, so that the utility model has higher stability and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0015] In the figure: 1. housing; 11. driving shaft hole; 12. driven shaft hole; 2. driving shaft; 21. fixing groove; 22. inner support bushing; 23. outer support bushing; 24. washer; 25. stop ring; 26. bearing limit convex body; 27. first driving shaft bearing; 28. second driving shaft bearing; 29. ​​third driving shaft bearing; 3. driven shaft; 31. coupling; 32. annular groove; 33. driven shaft key; 34. first driven shaft bearing; 35. second driven shaft bearing; 36. driven shaft support bushing; 4. first bevel gear; 5. second bevel gear; 51. keyway; 6. protective cover. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] like Figure 1 to Figure 2 As shown, this embodiment includes a housing 1, a driving shaft 2 and a driven shaft 3, the driving shaft 2 and the driven shaft 3 are installed inside the housing 1, and a driving shaft hole 11 and a driven shaft hole 12 are respectively opened on two surfaces of the housing 1, the driving shaft 2 and the driven shaft 3 are respectively penetrated and extended out of the driving shaft hole 11 and the driven shaft hole 12, a fixing groove 21 is opened at the end of the driving shaft 2, the first bevel gear 4 is fixedly connected to the driving shaft 2 through the fixing groove 21, an annular groove 32 is opened in the middle of the driven shaft 3, a driven shaft key 33 is formed in the annular groove 32, a key groove 51 is opened inside the second bevel gear 5, the key groove 51 is connected with the driven shaft key 33 so that the second bevel gear 5 is fixedly connected to the driven shaft 3, and the first bevel gear 4 and the second bevel gear 5 are meshed.

[0018] like Figure 1 to Figure 2 As shown, a washer 24 is sleeved on the driving shaft 2 near the first bevel gear 4, and a stop ring 25 is sleeved and fixed on the outside of the washer 24. A bearing limiting convex body 26 is integrally formed in the middle of the driving shaft 2. The first driving shaft bearing 27 is sleeved on the driving shaft 2 and is limited and fixed by the bearing limiting convex body 26. The second driving shaft bearing 28 is sleeved on the driving shaft 2 and connected to the stop ring 25. The inner support bushing 22 and the outer support bushing 23 are stacked and fixed on the driving shaft 2 and the inner support bushing 22 and the outer support bushing 23 are located between the first driving shaft bearing 27 and the second driving shaft bearing 28. The inner support bushing 22 and the outer support bushing 23 support and protect the driving shaft 2. The first driving shaft bearing 27 and the second driving shaft bearing 28 further support the driving shaft 2. The third driving shaft bearing 29 is sleeved on the driving shaft 2 and is located at the contact between the driving shaft 2 and the driving shaft hole 11. The third driving shaft bearing 29 reduces the friction of the driving shaft 2.

[0019] like Figure 1 to Figure 2 As shown, the coupling 31 is fixedly installed on the end of the driven shaft 3 extending out of the driven shaft hole 12. The coupling 31 is used to connect with the external motor shaft. A protective cover 6 is fixedly installed at the contact point between the driven shaft 3 and the driven shaft hole 12. The protective cover 6 ensures the sealing and structural strength of the place. The first driven shaft bearing 34 is sleeved on the driven shaft 3 and located below the protective cover 6. The first driven shaft bearing 34 can effectively reduce the friction of the driven shaft 3. The second driven shaft bearing 35 is sleeved on the driven shaft 3 and located at the bottom end of the driven shaft 3. The second driven shaft 3 supports the driven shaft 3 and improves the stability of the driven shaft 3.

[0020] To elaborate further, Figure 2 As shown, the driven shaft 3 support bushing is installed on the driven shaft 3 between the second bevel gear 5 and the first driven shaft bearing 34 , and the driven shaft 3 support bushing further supports and protects the driven shaft 3 .

[0021] The working principle of the utility model is as follows: the driven shaft 3 is connected to the external motor shaft through the coupling 31, the motor shaft drives the driven shaft 3 to operate, the second bevel gear 5 on the driven shaft 3 is meshed with the first bevel gear 4 on the driving shaft 2, the rotation of the driven shaft 3 drives the driving shaft 2 to rotate, one end of the driving shaft 2 is connected to the drilling and milling head tool, and the workpiece is drilled and milled.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0023] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A CNC machine tool drilling and milling head drive device, comprising a housing (1), a driving shaft (2) and a driven shaft (3), wherein the housing (1) is provided with a driving shaft hole (11) and a driven shaft hole (12), respectively, and the driving shaft (2) and the driven shaft (3) are installed inside the housing (1) and penetrate through and extend out of the driving shaft hole (11) and the driven shaft hole (12), respectively, and characterized in that: The end of the driving shaft (2) is provided with a fixing groove (21), a first bevel gear (4) is fixedly installed in the fixing groove (21), the end of the driven shaft (3) is fixedly installed with a coupling (31), the middle of the driven shaft (3) is provided with an annular groove (32), a driven shaft key (33) is formed in the annular groove (32), a second bevel gear (5) is fixed in the annular groove (32), a key groove (51) is provided inside the second bevel gear (5), and the second bevel gear (5) is connected to the driven shaft through the key groove. (51) is connected to the driven shaft key (33), the first bevel gear (4) and the second bevel gear (5) are meshed and fixed, the outer side of the driving shaft (2) is respectively sleeved and fixed with an inner support sleeve (22) and an outer support sleeve (23), the inner support sleeve (22) and the outer support sleeve (23) are stacked and fixed, and the outer support sleeve (23) is sleeved on the outside of the inner support sleeve (22), the driving shaft (2) is sleeved with a washer (24), and the outer side of the washer (24) is sleeved and fixed with a retaining ring (25).

2. A CNC machine tool drilling and milling head driving device according to claim 1, characterized in that: A bearing limiting convex body (26) is formed on the driving shaft (2), and a first driving shaft bearing (27) and a second driving shaft bearing (28) are respectively sleeved and fixed on the driving shaft (2) on both sides of the inner support bushing (22) and the outer support bushing (23), and the first driving shaft bearing (27) is in close contact with the bearing limiting convex body (26).

3. A CNC machine tool drilling and milling head driving device according to claim 1, characterized in that: A protective cover body (6) is fixedly installed at the connection between the driven shaft (3) and the driven shaft hole (12).

4. A CNC machine tool drilling and milling head driving device according to claim 1, characterized in that: A first driven shaft bearing (34) and a second driven shaft bearing (35) are respectively fixed on the driven shaft (3).

5. The CNC machine tool drilling and milling head driving device according to claim 1, characterized in that: A driven shaft support bushing (36) is sleeved and fixed on the driven shaft (3) at the upper end of the second bevel gear (5).

6. A CNC machine tool drilling and milling head driving device according to claim 1, characterized in that: A third driving shaft bearing (29) is sleeved and fixed at the connection between the driving shaft (2) and the driving shaft hole (11).

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