Double-cutter spindle box

Abstract

The utility model relates to the technical field of numerical control machine tools, in particular to a double-cutter spindle box which comprises a box body, a driving assembly, a rough milling assembly, a finish milling assembly, a transmission assembly and a lifting assembly. The rough milling assembly and the finish milling assembly are parallel to each other and are rotationally connected to the box body; the driving assembly and the transmission assembly are both installed on the box body, and the driving assembly controls the rough milling assembly and the finish milling assembly to rotate in a switching mode through the transmission assembly. The lifting assembly is used for driving the rough milling assembly or the finish milling assembly to move in a lifting mode. The double-shaft spindle box solves the problem that an existing double-shaft spindle box cannot keep low cost and high stability at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled machine tools, in particular to a double-knife spindle box. Background Art

[0002] With the development of science and technology, CNC technology has been widely used, and the technical field has been continuously improved. High-efficiency automated machine tools composed of mechanical equipment and CNC systems suitable for processing complex parts have become one of the most productive and widely used CNC machine tools in the world. It has strong comprehensive processing capabilities, and can complete more processing content after the workpiece is clamped once, with high processing accuracy. For batch workpieces with medium processing difficulty, its efficiency is 5 to 10 times that of ordinary equipment. In particular, it can complete many processing that ordinary equipment cannot complete, and is more suitable for single-piece processing with complex shapes and high precision requirements or small and medium-sized batch multi-variety production. It concentrates the functions of milling, boring, drilling, tapping and thread cutting on one device, so that it has multiple process means.

[0003] The spindle box is an important part of the milling machine. It is used to arrange the working spindle of the milling machine and its transmission parts and corresponding additional mechanisms. The spindle box is a complex transmission component. Its main function is to support the spindle and make it rotate, and realize the functions of spindle starting, braking, speed change and reversing.

[0004] Referring to the utility model with publication number CN216881738U, a dual-axis spindle box for a CNC milling machine is disclosed, which controls the lifting and lowering activities of the finishing components through a set of lifting drive mechanisms, thereby achieving an effect of controlling the activities of two sets of spindle boxes with one set of drive devices, thereby significantly reducing the processing cost of the spindle boxes; however, when the dual-axis spindle box for the CNC milling machine is actually used, the finishing components and the roughing components need to run at the same time, which can easily lead to instability in turning and milling processing and affect the processing accuracy.

[0005] Therefore, it is necessary to provide a technical solution to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the problem that the existing double-axis main shaft box cannot maintain low cost and high stability at the same time.

[0007] To achieve the above purpose, the utility model provides a double-knife spindle box, including a box body, a driving assembly, a rough milling assembly, a fine milling assembly, a transmission assembly and a lifting assembly, wherein:

[0008] The rough milling assembly and the fine milling assembly are parallel to each other and are both rotatably connected to the box body; the driving assembly and the transmission assembly are both installed on the box body, and the driving assembly controls the switching rotation of the rough milling assembly and the fine milling assembly through the transmission assembly; the lifting assembly is used to drive the lifting and lowering activities of the rough milling assembly or the fine milling assembly.

[0009] More specifically, the rough milling assembly includes a first rotating shaft and a rough milling cutter head, the first rotating shaft is rotatably connected to the housing, and the rough milling cutter head is disposed outside the housing and fixedly connected to the first rotating shaft.

[0010] More specifically, the fine milling assembly includes a second rotating shaft and a fine milling cutter head, the second rotating shaft is rotatably connected to the housing, and the fine milling cutter head is disposed outside the housing and fixedly connected to the second rotating shaft.

[0011] More specifically, a first driven gear is installed on the first rotating shaft, and a second driven gear is installed on the second rotating shaft, and the first driven gear and the second driven gear are located in different planes; the transmission assembly includes a driving shaft, a first driving gear, a second driving gear, a transmission control unit and a telescopic driver, the driving shaft is rotatably connected to the housing, the first driving gear and the second driving gear are both sleeved outside the driving shaft and connected to the driving shaft through bearings, the first driving gear is meshed with the first driven gear, and the second driving gear is meshed with the second driven gear, the transmission control unit is arranged between the first driving gear and the second driving gear, and is slidably connected to the driving shaft, and the transmission control unit can rotate with the driving shaft, and the telescopic driver is installed on the housing, and is used to drive the transmission control unit to switch and engage with the first driving gear and the second driving gear.

[0012] More specifically, the transmission control unit includes a switching plate and a turntable, the switching plate is connected to the output end of the telescopic drive, the turntable is rotatably connected to the switching plate and is slidably connected to the driving shaft, blocks are provided on both sides of the turntable, and the first driving gear and the second driving gear are both provided with a slot adapted to the block.

[0013] More specifically, both side walls of the block are inclined.

[0014] More specifically, the driving assembly includes a servo motor, a first gear and a second gear. The servo motor is mounted on the housing. The first gear is mounted on the output end of the servo motor. The second gear is mounted on the driving shaft and meshes with the first gear.

[0015] More specifically, the lifting assembly includes a nut, a threaded sleeve and a clutch. The nut is fixedly connected in the housing, the threaded sleeve is sleeved outside the fine milling assembly and is threadedly connected to the nut, and the clutch is installed on the housing to control the separation or engagement between the fine milling assembly and the threaded sleeve.

[0016] The technical effects of a double-knife spindle box involved in the utility model are:

[0017] The present application adds a transmission component, through which the power of the driving component can be transmitted to the rough milling component or the fine milling component. In this way, when the machine tool performs turning and milling processing on the workpiece, only the rough milling component or the fine milling component works, and the two milling cutters do not interfere with each other, thereby improving the stability of the turning and milling processing and improving the processing accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a double-knife spindle box involved in the utility model;

[0019] Figure 2 This is a front view of a double-knife spindle box involved in the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of a double-knife spindle box involved in the utility model;

[0021] Figure 4 A schematic diagram of the internal structure of a double-knife spindle box involved in the utility model from another perspective;

[0022] Figure 5 The utility model is a schematic diagram of the structure of a transmission component in a double-knife spindle box.

[0023] Markings in the figure:

[0024] 1. Box; 2. Driving assembly; 3. Rough milling assembly; 4. Fine milling assembly; 5. Transmission assembly; 6. Lifting assembly;

[0025] 21. servo motor; 22. first gear; 23. second gear;

[0026] 31. first rotating shaft; 32. rough milling cutter head; 33. first driven gear;

[0027] 41. second rotating shaft; 42. fine milling cutter head; 43. second driven gear;

[0028] 51. driving shaft; 52. first driving gear; 53. second driving gear; 54. transmission control unit; 541. switching plate; 542. turntable; 543. clamping block; 55. telescopic drive. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element at the same time; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] In order to more clearly illustrate the technical solution of the utility model, a preferred embodiment is provided below. Figure 1 to Figure 5 A double-knife spindle box includes a box body 1, a driving assembly 2, a rough milling assembly 3, a fine milling assembly 4, a transmission assembly 5 and a lifting assembly 6, wherein:

[0034] The rough milling assembly 3 and the fine milling assembly 4 are parallel to each other and are both rotatably connected to the box body 1; the driving assembly 2 and the transmission assembly 5 are both installed on the box body 1, and the driving assembly 2 controls the switching rotation of the rough milling assembly 3 and the fine milling assembly 4 through the transmission assembly 5; the lifting assembly 6 is used to drive the rough milling assembly 3 or the fine milling assembly 4 to lift and lower.

[0035] Compared with the prior art, the double-cutter spindle box involved in the utility model is different in that a transmission component 5 is added to the present application, through which the power of the driving component 2 can be transmitted to the rough milling component 3 or the fine milling component 4. In this way, when the machine tool performs turning and milling processing on the workpiece, only the rough milling component 3 or the fine milling component 4 works, and the two milling cutters do not interfere with each other, thereby improving the stability of the turning and milling processing and improving the processing accuracy of the workpiece.

[0036] In this embodiment, the rough milling assembly 3 includes a first rotating shaft 31 and a rough milling cutter head 32. The first rotating shaft 31 is rotatably connected to the housing 1. The rough milling cutter head 32 is disposed outside the housing 1 and is fixedly connected to the first rotating shaft 31. Specifically, the transmission assembly 5 can transmit the power of the driving assembly 2 to the first rotating shaft 31, so that the rough milling cutter head 32 rotates, thereby performing rough milling on the workpiece.

[0037] In this embodiment, the fine milling assembly 4 includes a second rotating shaft 41 and a fine milling cutter head 42, the second rotating shaft 41 is rotatably connected to the housing 1, and the fine milling cutter head 42 is disposed outside the housing 1 and fixedly connected to the second rotating shaft 41. Specifically, the transmission assembly 5 can transmit the power of the driving assembly 2 to the second rotating shaft 41, so that the fine milling cutter head 42 rotates, thereby performing fine milling on the workpiece.

[0038] In this embodiment, a first driven gear 33 is installed on the first rotating shaft 31, and a second driven gear 43 is installed on the second rotating shaft 41. The first driven gear 33 and the second driven gear 43 are located in different planes; the transmission assembly 5 includes a driving shaft 51, a first driving gear 52, a second driving gear 53, a transmission control unit 54 and a telescopic driver 55. The driving shaft 51 is rotatably connected to the housing 1. The first driving gear 52 and the second driving gear 53 are both sleeved outside the driving shaft 51 and connected to the driving shaft 51 through a bearing. The first driving gear 52 is meshed with the first driven gear 33, and the second driving gear 53 is meshed with the second driven gear 43. The transmission control unit 54 is arranged between the first driving gear 52 and the second driving gear 53, and is slidably connected to the driving shaft 51, and the transmission control unit 54 can rotate with the driving shaft 51. The telescopic driver 55 is installed on the housing 1, which is used to drive the transmission control unit 54 to switch and engage with the first driving gear 52 and the second driving gear 53. In actual application, the telescopic driver 55 first drives the transmission control unit 54 to move to engage with the first driving gear 52. At this time, the driving component 2 drives the driving shaft 51 to rotate, which can make the transmission control unit 54 drive the first driving gear 52 to rotate, and under the transmission of the first driven gear 33, the first rotating shaft 31 rotates, so that the rough milling cutter head 32 performs rough milling on the workpiece. After the rough milling is completed, the lifting component 6 drives the fine milling component 4 to descend, or drives the rough milling component 3 to rise, so that the fine milling cutter head 42 is located below the rough milling cutter head 32, and the telescopic driver 55 drives the transmission control unit 54 to move to engage with the second driving gear 53. At this time, the driving component 2 drives the driving shaft 51 to rotate, which can make the transmission control unit 54 drive the second driving gear 53 to rotate, and under the transmission of the second driven gear 43, the second rotating shaft 41 rotates, so that the fine milling cutter head 42 performs fine milling on the workpiece.

[0039] In this embodiment, the transmission control unit 54 includes a switching plate 541 and a rotating disk 542. The switching plate 541 is connected to the output end of the telescopic driver 55. The rotating disk 542 is rotatably connected to the switching plate 541 and is slidably connected to the driving shaft 51. Blocks 543 are provided on both sides of the rotating disk 542. The first driving gear 52 and the second driving gear 53 are provided with slots adapted to the blocks 543. In practical applications, the telescopic driver 55 controls the lifting and lowering of the switching plate 541 to achieve the effect of controlling the lifting and sliding of the rotating disk 542, so that the block 543 on the rotating disk 542 is engaged with the slot on the first driving gear 52 or the slot on the second driving gear 53. In this way, when the driving shaft 51 rotates, the rotating disk 542 can drive the first driving gear 52 or the second driving gear 53 to rotate. With the above design, the driving component 2 can only drive the rough milling component 3 or the fine milling component 4 to move, thereby avoiding mutual interference between the two.

[0040] Preferably, both side walls of the clamping block 543 are inclined. With the above design, the clamping block 543 can be more smoothly clamped into the clamping slot on the first driving gear 52 or the clamping slot on the second driving gear 53 .

[0041] In this embodiment, the driving assembly 2 includes a servo motor 21, a first gear 22 and a second gear 23. The servo motor 21 is mounted on the housing 1, the first gear 22 is mounted on the output end of the servo motor 21, and the second gear 23 is mounted on the driving shaft 51 and meshes with the first gear 22.

[0042] In this embodiment, the lifting assembly 6 includes a nut 61, a threaded sleeve 62 and a clutch 63. The nut 61 is fixedly connected in the housing 1. The threaded sleeve 62 is sleeved outside the fine milling assembly 4 and is threadedly connected to the nut 61. The clutch 63 is installed on the housing 1 to control the separation or engagement between the fine milling assembly 4 and the threaded sleeve 62. Specifically, when the clutch 63 drives the fine milling assembly 4 to engage with the threaded sleeve 62, the fine milling assembly 4 can drive the threaded sleeve 62 to rotate, and under the threaded cooperation between the threaded sleeve 62 and the nut 61, the lifting and lowering activities of the fine milling assembly 4 can be realized.

[0043] The above description is only a preferred embodiment of the present invention, and its structure is not limited to the shapes listed above. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-knife spindle box, characterized in that: It includes a box body, a driving assembly, a rough milling assembly, a fine milling assembly, a transmission assembly and a lifting assembly, among which: The rough milling assembly and the fine milling assembly are parallel to each other and are both rotatably connected to the box body; the driving assembly and the transmission assembly are both installed on the box body, and the driving assembly controls the switching rotation of the rough milling assembly and the fine milling assembly through the transmission assembly; the lifting assembly is used to drive the lifting and lowering activities of the rough milling assembly or the fine milling assembly.

2. According to claim 1, a double-knife spindle box is characterized in that: The rough milling assembly comprises a first rotating shaft and a rough milling cutter head, wherein the first rotating shaft is rotatably connected to the housing, and the rough milling cutter head is disposed outside the housing and fixedly connected to the first rotating shaft.

3. According to claim 2, a double-knife spindle box is characterized in that: The fine milling assembly comprises a second rotating shaft and a fine milling cutter head, wherein the second rotating shaft is rotatably connected to the housing, and the fine milling cutter head is disposed outside the housing and fixedly connected to the second rotating shaft.

4. According to claim 3, a double-knife spindle box is characterized in that: A first driven gear is installed on the first rotating shaft, and a second driven gear is installed on the second rotating shaft. The first driven gear and the second driven gear are located in different planes; the transmission assembly includes a driving shaft, a first driving gear, a second driving gear, a transmission control unit and a telescopic driver. The driving shaft is rotatably connected to the housing. The first driving gear and the second driving gear are both sleeved outside the driving shaft and connected to the driving shaft through bearings. The first driving gear is meshed with the first driven gear, and the second driving gear is meshed with the second driven gear. The transmission control unit is arranged between the first driving gear and the second driving gear, and is slidably connected to the driving shaft, and the transmission control unit can rotate with the driving shaft. The telescopic driver is installed on the housing, and is used to drive the transmission control unit to switch and engage with the first driving gear and the second driving gear.

5. The double-knife spindle box according to claim 4, characterized in that: The transmission control unit includes a switching plate and a turntable, the switching plate is connected to the output end of the telescopic driver, the turntable is rotatably connected to the switching plate and is slidably connected to the driving shaft, blocks are provided on both sides of the turntable, and the first driving gear and the second driving gear are both provided with a card slot adapted to the block.

6. The double-knife spindle box according to claim 5, characterized in that: The side walls of the block are both inclined.

7. The double-knife spindle box according to claim 4, characterized in that: The driving assembly includes a servo motor, a first gear and a second gear. The servo motor is mounted on the housing. The first gear is mounted on the output end of the servo motor. The second gear is mounted on the driving shaft and meshes with the first gear.

8. The double-knife spindle box according to claim 1, characterized in that: The lifting assembly includes a nut, a threaded sleeve and a clutch. The nut is fixedly connected to the housing. The threaded sleeve is sleeved outside the fine milling assembly and is threadedly connected to the nut. The clutch is installed on the housing to control the separation or engagement between the fine milling assembly and the threaded sleeve.

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