Oil cooling device of machine tool spindle

Abstract

The utility model discloses an oil cooling device of a machine tool spindle, which comprises a spindle, an oil cooling component is arranged outside the spindle, the oil cooling component comprises an oil cooling cylinder mounted outside the spindle, shaft grooves are symmetrically arranged at the top end and the bottom end of the oil cooling cylinder, the spindle can penetrate through the two shaft grooves, and the outer wall of the spindle is tightly attached to the interiors of the shaft grooves. A communicating ring is installed on the outer side of the oil cooling cylinder, a connecting pipe is installed on one side of the communicating ring, the connecting pipe is communicated with an inner cavity of the communicating ring, a spraying piece is installed on the inner side of the communicating ring, and an oil outlet assembly is installed at the end, away from the communicating ring, of the connecting pipe. And when air in the oil cooling cylinder is heated and expanded, the baffle is pushed. And after moving, the piston moves downwards under the pressure action of the heavy block to push the oil liquid to be uniformly sprayed on the circumferential outer wall of the main shaft from the spray pipe, so that the oil cooling effect on the main shaft is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool spindles, in particular to an oil cooling device for a machine tool spindle. Background Art

[0002] According to the patent application number "CN212794204U", the invention is titled "A Machine Tool Spindle Oil Cooling Device". The description states: During use, the operator starts the machine tool body, and the machine tool spindle runs at high speed under the drive motor. The machine tool spindle then emits a large amount of heat. Driven by the heat energy, the piston head performs work. The piston squeezes the air and pours the cold liquid oil in the oil tank through the straight pipe to the machine tool spindle. Under the action of the high-speed operation of the machine tool spindle and gravity, the cold liquid oil flows into the oil receiving tank. The entire oil cooling process of the spindle is basically completed, but the following defects still exist:

[0003] Since the straight-through pipe is only provided on one side of the main shaft, the spraying may be uneven when the cooling oil is sprayed, resulting in uneven heat dissipation of the main shaft and poor heat dissipation effect. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an oil cooling device for a machine tool spindle, which effectively solves the problem that the straight-through pipe is only provided on one side of the spindle, which may cause uneven spraying.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an oil cooling device for a machine tool spindle, comprising a spindle, wherein an oil cooling assembly is provided on the outside of the spindle;

[0006] The oil cooling assembly includes an oil cooling cylinder installed on the outside of the main shaft, and shaft grooves are symmetrically opened at the top and bottom ends of the oil cooling cylinder. The main shaft can pass through the two shaft grooves, and the outer wall of the main shaft is in close contact with the inside of the shaft groove. A connecting ring is installed on the outside of the oil cooling cylinder, and a connecting pipe is installed on one side of the connecting ring. The connecting pipe is connected to the inner cavity of the connecting ring, and a spray part is installed on the inside of the connecting ring. An oil outlet assembly is installed on the end of the connecting pipe away from the connecting ring, and an oil drain pipe is installed at the bottom end of the oil cooling cylinder, and a first valve is installed on the oil drain pipe.

[0007] Preferably, the spray component includes a nozzle installed at an equal angle on the inner side of the connecting ring, the nozzle is located inside the inner cavity of the oil cooling cylinder, an inner cavity is opened inside the nozzle, the inner cavity is connected with the inner cavity of the connecting ring, an end spray hole is opened at one end of the inner cavity away from the connecting ring, the diameter of the end spray hole is smaller than the diameter of the inner cavity, and an oil injection control component is installed inside the inner cavity.

[0008] Preferably, the fuel injection control component includes a guide cross bar arranged inside the inner cavity, one end of the guide cross bar is fixedly connected to the inner wall of the inner cavity of the connecting ring, the guide cross bar is parallel to the nozzle, and the diameter of the guide cross bar is smaller than the diameter of the end nozzle.

[0009] Preferably, a baffle is movably installed inside the inner cavity, the outer wall of the baffle is in close contact with the inner wall of the inner cavity, a guide groove is provided on the inner side of the baffle, the inner wall of the guide groove is in close contact with the outer wall of the guide cross bar, and a spring is installed on the side of the baffle away from the end nozzle, and one end of the spring is fixedly connected to the inner wall of the inner cavity of the connecting ring.

[0010] Preferably, the baffle is provided with through holes at equal angles. When the side of the baffle away from the spring is in close contact with the inner wall of the inner cavity close to the end nozzle, the inner wall of the inner cavity close to the end nozzle closes the through hole.

[0011] Preferably, the oil outlet assembly includes an oil tank fixedly mounted on an end of a connecting pipe away from the connecting ring, the connecting pipe is connected to the bottom end of one side of the oil tank, an oil filling pipe is installed on the other side of the oil tank, a second valve is installed on the oil filling pipe, a piston is movably installed inside the oil tank, the outer wall of the piston is in close contact with the inner wall of the inner cavity of the oil tank, a push rod is installed on the top of the piston, the push rod extends to the top of the oil tank, and a weight is installed on the top of the push rod.

[0012] Preferably, a guide vertical rod is installed at an equal angle on the top of the oil tank, the weight block is slidably connected to the guide vertical rod, a fixed side plate is installed on one side of the weight block, a cylinder is provided below the fixed side plate, the output end of the cylinder points to the fixed side plate, and the cylinder is fixedly installed on the side wall of the oil tank.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] During operation, the nozzles are arranged at equal angles on the inner side of the connecting ring, so that multiple nozzles are arranged at equal angles on the outer side of the main shaft. When the air inside the oil cooling cylinder expands due to heat, it pushes the baffle. After moving, the piston moves downward under the pressure of the weight, pushing the oil from the nozzles to be evenly sprayed on the circumferential outer wall of the main shaft, improving the oil cooling effect on the main shaft and improving the heat dissipation uniformity.

[0015] During operation, the cylinder is opened when the amount of oil in the oil tank is low, causing the output end of the cylinder to move upward, pushing the weight block upward, causing the piston to move above the oil filling pipe. At this time, the second valve is opened to fill the oil into the oil tank, facilitating subsequent oil cooling of the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0017] In the attached figure:

[0018] Figure 1 This is a schematic structural diagram of an oil cooling device for a machine tool spindle according to the present invention;

[0019] Figure 2 This is a schematic diagram of the oil cooling cylinder structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the oil cooling cylinder of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the fuel injection control component of the utility model;

[0022] Figure 5 This is a schematic diagram of the fuel tank structure of the utility model;

[0023] Figure 6 This is a schematic diagram of the internal structure of the fuel tank of the present utility model.

[0024] In the figure: 1. Main shaft; 2. Oil cooling assembly; 201. Oil cooling cylinder; 202. Shaft groove; 203. Oil drain pipe; 204. First valve; 205. Connecting ring; 206. Connecting pipe; 207. Nozzle; 208. Inner cavity; 209. End spray hole; 210. Oil injection control component; 2101. Guide cross bar; 2102. Baffle; 2103. Guide groove; 2104. Spring; 2105. Through hole; 3. Oil outlet assembly; 301. Oil tank; 302. Oil filling pipe; 303. Second valve; 304. Piston; 305. Push rod; 306. Weight block; 307. Guide vertical rod; 308. Fixed side plate; 309. Cylinder. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Embodiment 1, by Figure 1-6 The utility model relates to an oil cooling device for a machine tool spindle, comprising a spindle 1, an oil cooling assembly 2 being provided on the outside of the spindle 1;

[0027] The oil cooling assembly 2 includes an oil cooling cylinder 201 installed on the outside of the main shaft 1. The top and bottom ends of the oil cooling cylinder 201 are symmetrically provided with shaft grooves 202. The main shaft 1 can pass through the two shaft grooves 202. The outer wall of the main shaft 1 is tightly attached to the inside of the shaft groove 202. A connecting ring 205 is installed on the outside of the oil cooling cylinder 201. A connecting pipe 206 is installed on one side of the connecting ring 205. The connecting pipe 206 is connected to the inner cavity of the connecting ring 205. A spray piece is installed on the inside of the connecting ring 205. The end of the connecting pipe 206 away from the connecting ring 205 is equipped with an oil outlet assembly 3. The bottom end of the oil cooling cylinder 201 is equipped with an oil drain pipe. 203, a first valve 204 is installed on the oil drain pipe 203, and the spray part includes a nozzle 207 installed at an equal angle on the inner side of the connecting ring 205. The nozzle 207 is located inside the inner cavity of the oil cooling cylinder 201. An inner cavity 208 is opened inside the nozzle 207. The inner cavity 208 is connected to the inner cavity of the connecting ring 205. An end spray hole 209 is opened at one end of the inner cavity 208 away from the connecting ring 205. The diameter of the end spray hole 209 is smaller than the diameter of the inner cavity 208. An oil injection control part 210 is installed inside the inner cavity 208. The oil injection control part 210 includes a nozzle 210 provided inside the inner cavity 208. The guide crossbar 2101 has one end fixedly connected to the inner wall of the inner cavity of the connecting ring 205, and the guide crossbar 2101 is parallel to the nozzle 207. The diameter of the guide crossbar 2101 is smaller than the diameter of the end nozzle 209. A baffle 2102 is movably installed inside the inner cavity 208. The outer wall of the baffle 2102 is in close contact with the inner wall of the inner cavity 208. A guide groove 2103 is provided on the inner side of the baffle 2102. The inner wall of the guide groove 2103 is in close contact with the outer wall of the guide crossbar 2101. A spring 2104 is installed on the side of the baffle 2102 away from the end nozzle 209. One end of spring 2104 is fixedly connected to the inner wall of the connecting ring 205. Baffle 2102 is provided with through-holes 2105 at equal angles. When the side of baffle 2102 facing away from spring 2104 abuts against the inner wall of the inner cavity 208 near the end spray hole 209, the inner wall of the inner cavity 208 near the end spray hole 209 closes through-hole 2105. During operation, nozzles 207 are arranged at equal angles inside connecting ring 205, allowing multiple nozzles 207 to be arranged at equal angles outside the spindle 1. When the air inside the oil cooling cylinder 201 expands due to heat, it pushes baffle 2102. After movement, piston 304, under the pressure of weight 306, moves downward, pushing oil from nozzles 207 to be evenly sprayed onto the circumferential outer wall of spindle 1, improving the oil cooling effect on spindle 1.

[0028] The oil outlet assembly 3 includes an oil tank 301 fixedly mounted on one end of the connecting pipe 206 away from the connecting ring 205, the connecting pipe 206 is connected to the bottom end of one side of the oil tank 301, an oil filling pipe 302 is installed on the other side of the oil tank 301, and a second valve 303 is installed on the oil filling pipe 302. A piston 304 is movably installed inside the oil tank 301, and the outer wall of the piston 304 is in close contact with the inner wall of the inner cavity of the oil tank 301. A push rod 305 is installed on the top of the piston 304, and the push rod 305 extends to the top of the oil tank 301. A weight block 306 is installed on the top of the push rod 305, and a guide vertical rod 307 is installed at an equal angle on the top of the oil tank 301. The block 306 is slidably connected to the guide vertical rod 307. A fixed side plate 308 is installed on one side of the weight block 306. A cylinder 309 is provided below the fixed side plate 308. The output end of the cylinder 309 points to the fixed side plate 308. The cylinder 309 is fixedly installed on the side wall of the oil tank 301. During operation, the cylinder 309 is opened when the amount of oil in the oil tank 301 is small, so that the output end of the cylinder 309 moves upward, pushing the weight block 306 to move upward, so that the piston 304 moves to the top of the oil filling pipe 302. At this time, the second valve 303 is opened to fill the oil into the oil tank 301, which is convenient for subsequent oil cooling of the main shaft 1.

[0029] Working principle: During operation, when the spindle 1 works for a long time and generates heat, the air inside the inner cavity of the oil cooling cylinder 201 expands due to the heat, which generates pressure on the side of the baffle 2102 close to the end spray hole 209, pushing the baffle 2102 toward the side of the connecting ring 205, so that one end of the through hole 2105 is separated from the inner wall of the inner through cavity 208, and the through hole 2105 is opened. At this time, the piston 304 moves downward under the gravity of the weight 306, so that the piston 304 pushes the oil in the oil tank 301 into the connecting ring 205, and sprays it toward the outer periphery of the spindle 1 from the inner through cavity 208, the through hole 2105 and the end spray hole 209, thereby cooling the spindle 1.

[0030] When the amount of oil in the oil tank 301 is low, the cylinder 309 is opened, causing the output end of the cylinder 309 to move upward, pushing the weight 306 upward, causing the piston 304 to move above the oil filling pipe 302. At this time, the second valve 303 is opened to fill the oil tank 301, facilitating the subsequent oil cooling of the spindle 1.

[0031] After the oil is sprayed toward the outer wall of the main shaft 1 , it flows downward along the outer wall of the main shaft 1 to the bottom end of the oil cooling cylinder 201 . When the oil needs to be recovered, the first valve 204 is opened to discharge the oil from the oil cooling cylinder 201 .

Claims

1. An oil cooling device for a machine tool spindle, comprising a spindle (1), characterized in that: An oil cooling assembly (2) is provided outside the main shaft (1); The oil cooling assembly (2) includes an oil cooling cylinder (201) installed on the outside of the main shaft (1), and shaft grooves (202) are symmetrically opened at the top and bottom ends of the oil cooling cylinder (201). The main shaft (1) can pass through the two shaft grooves (202), and the outer wall of the main shaft (1) is tightly attached to the inside of the shaft groove (202). A connecting ring (205) is installed on the outside of the oil cooling cylinder (201), and a connecting pipe (206) is installed on one side of the connecting ring (205). The connecting pipe (206) is connected to the inner cavity of the connecting ring (205), and a spraying part is installed on the inside of the connecting ring (205). An oil outlet assembly (3) is installed at the end of the connecting pipe (206) away from the connecting ring (205). An oil drain pipe (203) is installed at the bottom end of the oil cooling cylinder (201), and a first valve (204) is installed on the oil drain pipe (203).

2. The oil cooling device for a machine tool spindle according to claim 1, characterized in that: The spraying component includes a nozzle (207) installed at an equal angle on the inner side of the connecting ring (205), the nozzle (207) is located inside the inner cavity of the oil cooling cylinder (201), an inner cavity (208) is opened inside the nozzle (207), the inner cavity (208) is connected to the inner cavity of the connecting ring (205), an end spray hole (209) is opened at one end of the inner cavity (208) away from the connecting ring (205), the diameter of the end spray hole (209) is smaller than the diameter of the inner cavity (208), and an oil injection control component (210) is installed inside the inner cavity (208).

3. The oil cooling device for a machine tool spindle according to claim 2, characterized in that: The fuel injection control component (210) includes a guide cross bar (2101) disposed inside the inner cavity (208), one end of the guide cross bar (2101) is fixedly connected to the inner wall of the inner cavity of the connecting ring (205), the guide cross bar (2101) is parallel to the nozzle (207), and the diameter of the guide cross bar (2101) is smaller than the diameter of the end nozzle (209).

4. The oil cooling device for a machine tool spindle according to claim 3, characterized in that: A baffle (2102) is movably installed inside the inner cavity (208), the outer wall of the baffle (2102 is in close contact with the inner wall of the inner cavity (208), a guide groove (2103) is provided on the inner side of the baffle (2102), the inner wall of the guide groove (2103) is in close contact with the outer wall of the guide cross bar (2101), and a spring (2104) is installed on the side of the baffle (2102) away from the end nozzle (209), and one end of the spring (2104) is fixedly connected to the inner wall of the inner cavity of the connecting ring (205).

5. The oil cooling device for a machine tool spindle according to claim 4, characterized in that: The baffle (2102) is provided with a through hole (2105) at an equal angle. When the side of the baffle (2102) away from the spring (2104) is in close contact with the inner wall of the inner cavity (208) at one end close to the end spray hole (209), the inner wall of the inner cavity (208) at one end close to the end spray hole (209) closes the through hole (2105).

6. The oil cooling device for a machine tool spindle according to claim 1, characterized in that: The oil outlet assembly (3) comprises an oil tank (301) fixedly mounted on one end of a connecting pipe (206) away from the connecting ring (205), the connecting pipe (206) being connected to the bottom end of one side of the oil tank (301), an oil filling pipe (302) being mounted on the other side of the oil tank (301), a second valve (303) being mounted on the oil filling pipe (302), a piston (304) being movably mounted inside the oil tank (301), an outer wall of the piston (304) being in close contact with the inner wall of the inner cavity of the oil tank (301), a push rod (305) being mounted on the top end of the piston (304), the push rod (305) being extended to the top of the oil tank (301), and a weight (306) being mounted on the top end of the push rod (305).

7. The oil cooling device for a machine tool spindle according to claim 6, characterized in that: A guide vertical rod (307) is installed at an equal angle on the top of the oil tank (301), and the weight block (306) is slidably connected to the guide vertical rod (307). A fixed side plate (308) is installed on one side of the weight block (306), and a cylinder (309) is provided below the fixed side plate (308). The output end of the cylinder (309) points to the fixed side plate (308), and the cylinder (309) is fixedly installed on the side wall of the oil tank (301).

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