Machine tool power head main shaft gun barrel structure
By introducing hydraulic oil circuits and oil inlet and return grooves into the spindle barrel structure of the machine tool power head, the problem of reduced processing accuracy caused by friction and wear is solved, and efficient movement and accuracy between the spindle barrel and the inner barrel is achieved. Cooperation maintains processing accuracy and simplifies the structure.
Patent Information
- Application Number
- CN202421206773.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-30
AI Technical Summary
After use for a period of time, the existing machine tool power head spindle barrel structure has reduced machining accuracy due to the friction and wear between the external spindle barrel and the internal barrel. In particular, the zero-degree matching structure loses rigidity after wear, further damages the machining accuracy. .
A machine tool power head spindle barrel structure including a spindle barrel, an inner barrel and a hydraulic oil circuit is designed. The inner barrel and the spindle barrel are coordinated at zero degrees and can move back and forth. The spindle barrel is equipped with an oil inlet hole. The oil inlet tank, oil return hole and oil return tank are connected to the hydraulic oil circuit. The hydraulic oil pressure is adjusted through the hydraulic oil circuit, fill the gap between the spindle barrel and the inner barrel, and maintain the rigidity of the zero-degree matching structure.
Through the pressure filling of the hydraulic oil circuit, friction and wear between the spindle barrel and the inner barrel is avoided, processing accuracy is maintained, and the height movement between the inner barrel and the spindle barrel is ensured. The structure is simple and reasonable, and the hydraulic oil is The uniform pressure applied improves the use effect.
Smart Images
Figure CN222448299U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machine tools, in particular to a main shaft barrel structure of a machine tool power head. Background Art
[0002] At present, machine tools are mainly used to turn rotating workpieces with turning tools. Drills, reamer drills, reamers, taps, dies and knurling tools can also be used on machine tools for corresponding processing. Machine tools are mainly used to process shafts, discs, sleeves and other workpieces with rotating surfaces. They are the most widely used type of equipment in mechanical manufacturing and repair factories. At present, the spindle barrel of the externally circulated power head on the existing machine tools has a complex structure. After a period of use, the friction and wear between the outer spindle barrel and the inner barrel often cause a loss of processing accuracy. In particular, the spindle barrel with a zero-degree matching structure achieves a high speed, but it loses rigidity after wear and thus loses processing accuracy. Utility Model Content
[0003] Therefore, in view of the above-mentioned problems, the utility model proposes a spindle barrel structure of a machine tool power head which can realize high-speed movement and maintain processing accuracy and has a simple and reasonable structure.
[0004] To solve this technical problem, the utility model adopts the following solution: a spindle barrel structure of a machine tool power head, including a spindle barrel, and also including an inner barrel and a hydraulic oil circuit mounted on the spindle, the inner barrel and the spindle barrel are matched at zero degree and the inner barrel can be reciprocated in the spindle barrel, the spindle barrel is provided with an oil inlet hole and an oil return hole, the inner wall of the spindle barrel is provided with an oil inlet groove connected to the oil inlet hole, the inner wall of the spindle barrel is also provided with an oil return groove connected to the oil return hole, the spindle barrel is provided with sealing rings at both ends of the reciprocating travel of the inner barrel, the oil outlet of the hydraulic oil circuit is connected to the oil inlet hole on the spindle barrel, and the oil inlet of the hydraulic oil circuit is connected to the oil return hole on the spindle barrel.
[0005] As a further improvement, the oil inlet groove on the main shaft barrel is coaxially arranged along the reciprocating direction of the inner barrel.
[0006] As a further improvement, the oil return groove on the main shaft barrel is coaxially arranged along the reciprocating direction of the inner barrel.
[0007] As a further improvement, the oil inlet groove and the oil return groove of the main shaft barrel are symmetrically arranged along the central axis of the main shaft barrel.
[0008] As a further improvement, the spindle barrel is provided with an oil inlet channel and a plurality of oil inlet grooves connected to the oil inlet channel are evenly distributed on the inner wall of the spindle barrel, and the oil inlet hole of the spindle barrel is connected to the oil inlet channel.
[0009] As a further improvement, the spindle barrel is provided with an oil return channel and a plurality of oil return grooves connected to the oil return channel are evenly distributed on the inner wall of the spindle barrel, and the oil return hole of the spindle barrel is connected to the oil return channel.
[0010] As a further improvement, the oil inlet groove and the oil return groove of the main shaft barrel are symmetrically arranged along the central axis of the main shaft barrel.
[0011] By adopting the above-mentioned technical scheme, the beneficial effect of the utility model is as follows: by arranging an oil inlet hole, an oil inlet groove, an oil return hole, and an oil return groove on the main shaft barrel and connecting them with the hydraulic oil circuit, the hydraulic oil circuit can adjust the pressure of the hydraulic oil applied by the hydraulic oil circuit to enter the main shaft barrel and the inner barrel for filling according to whether there is wear between the main shaft barrel and the inner barrel or the degree of wear, so that there will be no gap between the main shaft barrel and the inner barrel due to friction and wear between the two, thereby losing the processing accuracy. That is, due to the pressure of the hydraulic oil, the inner barrel maintains a complete zero-degree matching structure with the main shaft barrel, thereby continuously maintaining the height movement between the inner shaft barrel and the main shaft barrel, while keeping the processing tool on the inner shaft barrel from vibrating due to wear gap and other problems that affect the processing accuracy. The structure is simple and reasonable, and the opposing settings of the oil return groove and the oil inlet groove make the pressure applied by the overall hydraulic oil more uniform, the use effect is more ideal, and it can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;
[0013] Figure 2 It is a cross-sectional structural schematic diagram of an embodiment of the utility model;
[0014] Figure 3 It is a schematic diagram of the structure of an embodiment of the utility model installed on a power head of a machine tool. DETAILED DESCRIPTION
[0015] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.
[0016] refer to Figure 1 and Figure 2The preferred spindle barrel structure of the machine tool power head of the utility model comprises a spindle barrel 1, an inner barrel 2 sleeved on the spindle and a hydraulic oil circuit, wherein the inner barrel 2 is matched with the spindle barrel 1 at zero degree and the inner barrel 2 is reciprocally movable in the spindle barrel 1, an oil inlet hole 11 and an oil return hole 12 are arranged on the spindle barrel 1, an oil inlet channel 13 connected with the oil inlet hole 11 is arranged on the spindle barrel 1, and a plurality of oil inlet grooves 14 connected with the oil inlet channel 13 are evenly distributed on the inner wall of the spindle barrel 1, and the spindle barrel 1 An oil return channel 15 connected to the oil return hole 12 is provided on the main shaft barrel 1, and a plurality of oil return grooves 16 connected to the oil return channel 15 are evenly distributed on the inner wall of the main shaft barrel 1. The oil inlet groove 14 and the oil return groove 16 of the main shaft barrel 1 are symmetrically arranged along the central axis of the main shaft barrel 1. The main shaft barrel 1 is located at both ends of the reciprocating travel of the inner barrel 2 and is respectively provided with sealing rings 3. The oil outlet of the hydraulic oil circuit is connected to the oil inlet hole 11 on the main shaft barrel 1, and the oil inlet of the hydraulic oil circuit is connected to the oil return hole 12 on the main shaft barrel 1.
[0017] refer to Figure 3 The machine tool power head includes a feed motor 4, a spindle housing 5, a spindle barrel 1, an inner barrel 2 and a spindle 6; the inner barrel 2 is sleeved on the spindle 6 on which the tool is installed, and the inner barrel 2 can be axially movably inserted in the spindle barrel 1; the feed motor 4 is fixed on the spindle housing 4; the spindle barrel 1 is arranged on the spindle housing 4, and the feed motor 4 is connected to the inner barrel 2 to drive the inner barrel 2 and the spindle barrel to move back and forth.
[0018] The oil inlet groove and the oil return groove in the above embodiment may also be arranged in other structures, such as the oil inlet groove on the main shaft barrel is arranged coaxially along the reciprocating direction of the inner barrel, the oil return groove on the main shaft barrel is arranged coaxially along the reciprocating direction of the inner barrel, and the oil inlet groove and the oil return groove of the main shaft barrel are arranged symmetrically along the central axis of the main shaft barrel. The symmetrical arrangement of the oil inlet groove and the oil return groove of the main shaft barrel makes the hydraulic oil pressure between the main shaft barrel and the inner barrel more evenly distributed, and the use effect is better.
[0019] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.
Claims
1. A spindle barrel structure of a machine tool power head, comprising a spindle barrel, characterized in that: The inner barrel is matched with the main shaft barrel at zero degree and can be reciprocated in the main shaft barrel. An oil inlet hole and an oil return hole are arranged on the main shaft barrel. An oil inlet groove connected with the oil inlet hole is arranged on the inner wall of the main shaft barrel. An oil return groove connected with the oil return hole is also arranged on the inner wall of the main shaft barrel. Sealing rings are respectively arranged at both ends of the reciprocating travel of the inner barrel of the main shaft barrel. The oil outlet of the hydraulic oil circuit is connected with the oil inlet hole on the main shaft barrel, and the oil inlet of the hydraulic oil circuit is connected with the oil return hole on the main shaft barrel.
2. The spindle barrel structure of the machine tool power head according to claim 1, characterized in that: The oil inlet groove on the main shaft barrel is coaxially arranged along the reciprocating movement direction of the inner barrel.
3. The spindle barrel structure of the machine tool power head according to claim 1, characterized in that: The oil return groove on the main shaft barrel is coaxially arranged along the reciprocating movement direction of the inner barrel.
4. The spindle barrel structure of the machine tool power head according to claim 3 is characterized in that: The oil inlet groove and the oil return groove of the main shaft barrel are symmetrically arranged along the central axis of the main shaft barrel.
5. The spindle barrel structure of a machine tool power head according to claim 1, characterized in that: The main shaft barrel is provided with an oil inlet channel, and a plurality of oil inlet grooves connected with the oil inlet channel are evenly distributed on the inner wall of the main shaft barrel, and the oil inlet hole of the main shaft barrel is connected with the oil inlet channel.
6. The spindle barrel structure of a machine tool power head according to claim 1, characterized in that: The main shaft barrel is provided with an oil return channel, and a plurality of oil return grooves connected with the oil return channel are evenly distributed on the inner wall of the main shaft barrel, and the oil return hole of the main shaft barrel is connected with the oil return channel.
7. The spindle barrel structure of the machine tool power head according to claim 6, characterized in that: The oil inlet groove and the oil return groove of the main shaft barrel are symmetrically arranged along the central axis of the main shaft barrel.