High-speed spindle structure of high-precision numerical control machine tool

Abstract

The utility model discloses a high-speed main shaft structure of a high-precision numerical control machine tool, which belongs to the technical field of numerical control machine tools and comprises a main shaft and a shaft casing sleeved on the outer side of the main shaft, bearings are mounted at two ends inside the shaft casing, inner rings of the bearings are fixed on the outer side of the main shaft, and a lubricating liquid storage cavity is arranged on the side edge of the shaft casing. And adding holes are formed in outer rings of the bearings, and a quantitative adding mechanism for adding lubricating liquid is arranged in the shaft shell. The adding holes are formed in the outer rings of the bearings, the lubricating liquid storage cavity and the transfer cavity are formed in the shaft shell, and a quantitative adding mechanism composed of the adding pipe, the piston, the pull rod, the motor, the rotating disc and the positioning rod can automatically lubricate the multiple sets of bearings at the same time in the using process; the structure of the main shaft and the mounting mode of the bearing are not changed, the practicability is higher, and the operation of the main shaft is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a main shaft structure, in particular to a high-precision numerical control machine tool high-speed main shaft structure belongs to numerical control machine tool technical field. BACKGROUND

[0002] The prior art such as the utility model discloses a numerical control machine tool main shaft structure in the application No. 202020568044.5, in order to solve the traditional machine tool main shaft lubrication mode usually for manual addition, not only time -consuming and labor -intensive and difficult to control flow, influence work efficiency's problem, through the starting motor makes driving gear through driven gear drive main shaft rotation, the main shaft works when adjusting good flow control valve after starting oil pump, flow control valve is favorable to control the adding amount of lubricating oil, the oil tank is added to the oil groove in oil pipe after oil pump starts, the lubricating oil in the oil tank is added to the oil groove through the oil injection hole, and the lubricating oil in the oil groove is added to the oil groove through the oil injection hole. The front bearing and the rear bearing are added to the oil groove, and the front bearing and the rear bearing are lubricated, which is beneficial to the lubrication of the front bearing and the rear bearing during the operation of the main shaft. When the main shaft stops working, the oil plug loses the centrifugal force, and the stretched spring rebounds to drive the oil plug back into the oil injection hole. Stop adding lubricating oil to avoid the lubricating oil in the oil groove from leaking out through the oil injection hole when the main shaft is not working, causing unnecessary waste.

[0003] Similar to the above application, there are still some deficiencies:

[0004] In order to ensure the stable operation of the main shaft, a plurality of bearings are arranged at both ends of the main shaft, and the gap between the bearings is small. The lubricating oil is added by injecting the lubricating oil into the main shaft and centrifuging. The distance between the bearings needs to be changed and the installation method needs to be changed. At the same time, the opening of the hole on the main shaft will affect the strength of the bearing and the stability of the operation of the main shaft.

[0005] Therefore, a high-precision numerical control machine tool high-speed main shaft structure is designed to optimize the above problems. Utility model content

[0006] The main purpose of the utility model is to provide a high-precision numerical control machine tool high-speed main shaft structure, which comprises an adding hole formed on the outer ring of the bearing, and a lubricating liquid storage cavity, a transfer cavity, an adding pipe, a piston, a pull rod, a motor, a rotating disc and a positioning rod arranged on the shaft shell. The quantitative adding mechanism can automatically lubricate multiple bearings simultaneously during use without changing the structure of the main shaft and the installation method of the bearing. The utility model has higher practicality, and the operation of the main shaft is more stable. A fixing sleeve is sleeved on the main shaft, and blades are uniformly arranged on the outer side of the fixing sleeve. The rotation of the blades can be automatically controlled during the rotation of the main shaft, the air flow rate in the shaft shell can be increased, and the temperature in the shaft shell can be uniform.

[0007] The purpose of the utility model can be achieved by adopting the following technical scheme:

[0008] A high-precision numerical control machine tool high-speed spindle structure, including spindle and the shaft shell that sets in the outside of the spindle, both ends of the inside of the shaft shell are installed with bearing, the inner ring of bearing is fixed in the outside of the spindle, the side of the shaft shell is provided with lubricating liquid storage cavity, the outer ring of bearing is provided with adding hole, the inside of the shaft shell is equipped with the quantitative adding mechanism that adds lubricating liquid.

[0009] Preferably, the top of the lubricating liquid storage cavity is provided with a sealing cover, and the top of the sealing cover is made of transparent material.

[0010] Preferably, the quantitative adding mechanism includes a transfer cavity, an adding pipe, a piston and a reciprocating assembly, the transfer cavity is vertically provided in the inside of the shaft shell, the adding pipe is provided between the bottom end of the transfer cavity and the adding hole, a liquid inlet pipe is provided between the bottom end of the transfer cavity and the lubricating liquid storage cavity, a one-way valve is provided on the adding pipe and the liquid inlet pipe, the piston is slidably provided in the inside of the transfer cavity, and the outside of the shaft shell is provided with the reciprocating assembly for controlling the sliding of the piston.

[0011] Preferably, the reciprocating assembly includes a pull rod, a motor, a turntable and a positioning rod, the pull rod is hingedly installed on the top of the piston, the motor is installed on the outside of the shaft shell, the output end of the motor is installed with the turntable, the turntable is fixed with the positioning rod on the outside, and the top end of the pull rod is rotatably connected with the positioning rod.

[0012] Preferably, a fixing sleeve is installed on the outside of the spindle, and blades are uniformly fixed on the outside of the fixing sleeve.

[0013] The utility model discloses the beneficial effects are:

[0014] The high-precision numerical control machine tool high-speed spindle structure provided by the utility model can automatically lubricate multiple bearings simultaneously in the process of use, without changing the structure of the spindle and the installation mode of the bearing, and is more practical and stable in operation.

[0015] The fixing sleeve is sleeved on the spindle, and the blades are uniformly installed on the outside of the fixing sleeve, so that the rotation of the blades can be automatically controlled in the process of rotation of the spindle, the rate of air flow in the shaft shell is increased, and the temperature in the shaft shell is uniform. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is the front view of the utility model;Figure 1 Enlarged view at A;

[0018] Figure 3 The utility model discloses a Figure 1 Enlarged view at B.

[0019] In the figure: 1, main shaft, 2, axle shell, 3, bearing, 4, lubricating liquid storage cavity, 5, adding hole, 6, ration adding mechanism, 7, fixed sleeve, 8, vane, 9, transfer cavity, 10, adding pipe, 11, piston, 12, pull rod, 13, motor, 14, rotating disc, 15, positioning rod. DETAILED DESCRIPTION

[0020] In order to make the person in the art more clearly and definitely the technical scheme of the utility model, the utility model is described in further detail below in conjunction with examples and drawings, but the implementation of the utility model is not limited to this.

[0021] As Figures 1-3 The embodiment provides a high-precision numerical control machine tool high-speed spindle structure, including main shaft 1 and the axle shell 2 of the sleeve setting in the outside of main shaft 1, both ends in the axle shell 2 inside are installed with bearing 3, the inner ring of bearing 3 is fixed in the outside of main shaft 1, the side of axle shell 2 is provided with lubricating liquid storage cavity 4, the outer ring of bearing 3 is all provided with adding hole 5, and the inside of axle shell 2 is equipped with ration adding mechanism 6 for adding lubricating liquid.

[0022] Total working principle: in use, first, the lubricating liquid is stored in the inside of the lubricating liquid storage cavity 4, when the bearing 3 is lubricated, the ration adding mechanism 6 is used to extract the lubricating liquid, then the inside of the adding hole 5 is injected uniformly, in the process that the main shaft 1 drives the bearing 3 to rotate, the lubricating liquid can be uniformly coated, and uniform lubrication is guaranteed.

[0023] In the embodiment, the top of the lubricating liquid storage cavity 4 is provided with a sealing cover, and the top of the sealing cover is of transparent material.

[0024] Local working principle: in the process of adding lubricating liquid, the amount of lubricating liquid can be observed through the top end of the sealing cover, so as to add in time.

[0025] In the embodiment, the ration adding mechanism 6 includes a transfer cavity 9, an adding pipe 10, a piston 11 and a reciprocating assembly, the transfer cavity 9 is vertically arranged in the inside of the axle shell 2, the adding pipe 10 is arranged between the bottom end of the transfer cavity 9 and the adding hole 5, a liquid inlet pipe is arranged between the bottom end of the transfer cavity 9 and the lubricating liquid storage cavity 4, a one-way valve is arranged on the adding pipe 10 and the liquid inlet pipe, the piston 11 is slidably arranged in the inside of the transfer cavity 9, and the reciprocating assembly is arranged on the outside of the axle shell 2 and used for controlling the sliding of the piston 11.

[0026] Part working principle: in the process of adding lubricating liquid, reciprocating assembly controls single cycle operation of piston 11 inside transfer cavity 9, in the process of piston 11 moving up, lubricating liquid inside lubricating liquid storage cavity 4 is extracted, and in the process of piston 11 moving down, lubricating liquid is discharged from adding pipe 10, and adding hole 5 on multiple bearings 3 is added with lubricating liquid.

[0027] In the embodiment, reciprocating assembly includes pull rod 12, motor 13, rotating disc 14 and positioning rod 15, pull rod 12 is hingedly installed on the top of piston 11, motor 13 is installed on the outside of shaft shell 2, the output end of motor 13 is installed with rotating disc 14, rotating disc 14 is fixed with positioning rod 15 outside, and the top end of pull rod 12 is rotatably connected with positioning rod 15.

[0028] Part working principle: in the process of lubricating, motor 13 drives rotating disc 14 to rotate, rotating disc 14 rotates 360 degrees, and piston 11 is controlled to operate a cycle by pull rod 12 to add lubricating liquid quantitatively.

[0029] In the embodiment, the outside of main shaft 1 is installed with fixed sleeve 7, and the outside of fixed sleeve 7 is uniformly fixed with blades 8 in the circumferential direction.

[0030] Part working principle: currently, the liquid cooling mode is mostly used to contact cooling bearing 3 in the process of rotation of main shaft 1, and the middle section of shaft shell 2 cannot be cooled, so that the temperature of the middle section of shaft shell 2 is high, and the rotation of blade 8 is driven in the process of rotation of main shaft 1, the flow rate of gas inside shaft shell 2 is increased, and the balance of the temperature inside shaft shell 2 is ensured.

[0031] The above is only further embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the conception of the utility model within the range disclosed by the utility model, and it belongs to the protection scope of the utility model.

Claims

1. A high-precision numerical control machine tool high-speed spindle structure, comprising a spindle (1) and a shaft shell (2) sleeved outside the spindle (1), characterized in that: The shaft shell (2) is internally provided with bearings (3) at both ends, the inner ring of the bearing (3) is fixed to the outer side of the main shaft (1), the side of the shaft shell (2) is provided with a lubricating liquid storage cavity (4), the outer ring of the bearing (3) is provided with an adding hole (5), the inside of the shaft shell (2) is provided with a quantitative adding mechanism (6) for adding lubricating liquid; The quantitative adding mechanism (6) comprises a transfer cavity (9), an adding pipe (10), a piston (11) and a reciprocating assembly, the transfer cavity (9) is vertically arranged in the inside of the shaft shell (2), the bottom end of the transfer cavity (9) and the adding hole (5) are provided with the adding pipe (10), the bottom end of the transfer cavity (9) and the lubricating liquid storage cavity (4) are provided with a liquid inlet pipe, the adding pipe (10) and the liquid inlet pipe are provided with one-way valves, the inside of the transfer cavity (9) is slidably provided with the piston (11), the outside of the shaft shell (2) is provided with the reciprocating assembly for controlling the sliding of the piston (11).

2. The high-precision numerical control machine tool high-speed spindle structure according to claim 1, characterized in that: The top of the lubricating liquid storage cavity (4) is provided with a sealing cover, and the top of the sealing cover is made of transparent material.

3. The high-precision numerical control machine tool high-speed spindle structure according to claim 2, characterized in that: The reciprocating assembly comprises a pull rod (12), a motor (13), a rotating disc (14) and a positioning rod (15), the pull rod (12) is hingedly arranged on the top of the piston (11), the motor (13) is arranged on the outside of the shaft shell (2), the output end of the motor (13) is provided with the rotating disc (14), the rotating disc (14) is fixedly provided with the positioning rod (15) on the outside, and the top end of the pull rod (12) is rotatably connected with the positioning rod (15).

4. The high-precision CNC machine tool high-speed spindle structure according to any one of claims 1-3, characterized in that: The outside of the main shaft (1) is provided with a fixed sleeve (7), and the outside of the fixed sleeve (7) is uniformly fixed with blades (8) in the circumferential direction.

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