Spindle box with cooling structure

Abstract

The utility model discloses a spindle box with a cooling structure, which comprises a spindle box body, a spindle arranged in the spindle box body and a cooling heat exchange device arranged in the spindle box body and used for cooling lubricating oil, and an oil injection channel is arranged on the side wall of the spindle box body. The cooling heat exchange device comprises a frame with two open ends and a partition plate arranged in the frame, a cooling inlet and a cooling outlet are formed in the two ends of the frame respectively, and the partition plate extends from the cooling inlet to the cooling outlet. And the inner cavity of the frame body is divided into a first flow channel communicated with the cooling inlet and a second flow channel communicated with the cooling outlet. According to the utility model, external cooling fluid enters the cooling and heat exchange device and performs cooling and heat exchange on the lubricating oil in the main shaft box body, so that the lubricating oil can cool the interior of the main shaft box body, the main shaft is not easy to be overheated during long-term work, and the service life of the main shaft is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of spindle boxes, in particular to a spindle box with a cooling structure. Background Art

[0002] The spindle box is an extremely important working component on a machine tool and is responsible for the main operation of the machine tool. The heat on the spindle (the spindle head is heated more) is transferred to the inner ring of the bearing. The temperature of the inner ring of the bearing is greatly affected by the spindle. When the temperature of the inner ring of the bearing rises, the stiffness of the inner ring of the bearing decreases, thereby reducing the machining accuracy of the machine tool. The cooling of the bearing is usually done by pouring cooling lubricant into the bearing, but this cooling and lubrication method has the following defects: pouring cooling lubricant into the bearing cannot prevent the heat on the spindle from being transferred to the inner ring of the bearing. If the heat of the spindle is not discharged in time, it will also wear the machine tool tools, and the machine tool spindle will be deformed, damaged, or even broken due to heat, thereby affecting the machining accuracy. If cooling lubricant is added to the spindle, the bearing cannot be cooled and lubricated, and the cooling lubricant on the spindle is relatively concentrated, resulting in uneven cooling of the spindle and the possibility of overflowing of the cooling lubricant, which wastes energy and pollutes the environment.

[0003] In view of this, the inventors of this case conducted in-depth research on the above-mentioned issues, which led to the creation of this case. Utility Model Content

[0004] The purpose of the utility model is to provide a main spindle box with a cooling structure which has a simple structure, is easy to maintain, and can quickly and evenly realize cooling and heat dissipation of the main spindle.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solution:

[0006] A spindle box with a cooling structure includes a spindle box body and a spindle arranged in the spindle box body, an oil pump is connected to the side of the spindle box body, an oil injection channel connected to the oil pump is provided on the side wall of the spindle box body, and a cooling heat exchange device is provided in the spindle box body for cooling the lubricating oil, the cooling heat exchange device includes a frame body with openings at both ends and a partition plate provided in the frame body, a cooling inlet and a cooling outlet are respectively provided at both ends of the frame body, the partition plate extends from one end of the frame body to the other end of the frame body, and divides the inner cavity of the frame body into a first flow channel connected to the cooling inlet and a second flow channel connected to the cooling outlet.

[0007] Preferably, at least one cooling auxiliary tube is provided on the side wall of the frame body, and the cooling auxiliary tube has a first opening connected to the first flow channel and a second opening connected to the second flow channel, the first opening and the second opening are arranged in the same direction on the side wall of the frame body, and the axis of the first opening is parallel to the axial direction of the second opening.

[0008] Preferably, the auxiliary cooling pipe has a U-shaped structure, and a connecting section of the auxiliary cooling pipe connecting the first opening and the second opening extends toward the lower end of the spindle box body to be immersed in the lubricating oil in the spindle box body.

[0009] Preferably, the cooling and heat exchange device further includes a first sealing head for opening and closing the cooling inlet and a second sealing head for opening and closing the cooling outlet.

[0010] Preferably, a first pipe connected to the cooling inlet is provided on the first head, and a second pipe connected to the cooling outlet is provided on the second head. Both the first pipe and the second pipe extend to the outside of the spindle box body and are connected to the external supply pipe.

[0011] Preferably, the frame is in any one of cylindrical, elliptical or square shapes.

[0012] By adopting the above-mentioned design scheme, the beneficial effects of the utility model are: external cooling fluid enters the cooling and heat exchange device and cools the lubricating oil inside the spindle box body for heat exchange, so that the lubricating oil can cool the inside of the spindle box body, thereby making it less likely for the spindle to overheat during long-term operation, thereby extending the service life of the spindle; by setting a bidirectional flow cooling inlet and cooling outlet, operation is facilitated; by setting a partition plate, the cooling fluid in the frame can be prevented from flowing from the first flow channel to the second flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 This is a schematic structural diagram of the cooling and heat exchange device in the present invention;

[0016] Figure 4 This is a cross-sectional view of the cooling and heat exchange device in the present invention;

[0017] In the figure: the spindle box body 1, the spindle 11, the cooling and heat exchange device 2, the frame 21, the partition plate 22, the first flow channel 221, the second flow channel 222, the cooling inlet 23, the cooling outlet 24, the auxiliary pipe 25, the first opening 251, the second opening 252, the first head 26, the first pipe 261, the second head 27, and the second pipe 271. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Reference Figures 1 to 4

[0020] A spindle box with a cooling structure includes a spindle box body 1, a spindle 11 disposed within the spindle box body 1, and a cooling heat exchange device 2 disposed within the spindle box body 1 for cooling lubricating oil. An oil pump is connected to the side of the spindle box body 1, and an oil injection channel connected to the oil pump 2 is provided on the side wall of the spindle box body 1. Lubricating oil for lubricating the spindle 11 and bearings is injected into the spindle box body 1 through the oil injection channel, and then a portion of the cooling heat exchange device 2 is immersed in the lubricating oil. At the same time, an external cooling fluid passes through the cooling heat exchange device 2 to cool and exchange heat with the lubricating oil within the spindle box body 1, so that the spindle 11 can be evenly cooled and the cooling lubricating oil will not overflow.

[0021] Specifically, the cooling and heat exchange device 2 includes a frame 21 with openings at both ends and a partition plate 22 disposed within the frame 21. It is worth noting that the frame 21 in this embodiment is cylindrical, but is not limited to a cylindrical shape and can also be elliptical, square, or other shapes, depending on actual conditions.

[0022] The two ends of the frame 21 are respectively a cooling inlet 23 and a cooling outlet 24. The partition plate 22 extends from the cooling inlet 23 to the cooling outlet 24, and divides the inner cavity of the frame 21 into a first flow channel 221 connected to the cooling inlet 23 and a second flow channel 222 connected to the cooling outlet 24, providing a space for the cooling fluid to gather after entering the frame 21 through the cooling inlet 23 and providing a space for the cooling fluid to gather before discharging from the frame 21 through the cooling outlet 24. The partition plate 22 prevents the fluid from flowing between the first flow channel 221 and the second flow channel 222.

[0023] Furthermore, at least one cooling auxiliary pipe 25 is provided on the side wall of the frame body 21. The cooling auxiliary pipe 25 has a first opening 251 connected to the first flow channel 221 and a second opening 252 connected to the second flow channel 222. The first opening 251 and the second opening 252 are arranged in the same direction on the side wall of the frame body 21. The axis of the first opening 251 and the axial direction of the second opening 252 are parallel. The cooling auxiliary pipe 25 has a U-shaped structure, that is, it wraps the frame body 21. The connecting section 253 of the cooling auxiliary pipe 25 connecting the first opening 251 and the second opening 252 extends toward the lower end of the spindle box body 1 to the lubricating oil immersed in the spindle box body 1.

[0024] Furthermore, the cooling and heat exchange device 2 also includes a first head 26 for opening and closing the cooling inlet 23 and a second head 27 for opening and closing the cooling outlet 24. The first head 26 and the second head 27 can be formed by one or more parts as needed. The advantage of the first head 26 and the second head 27 provided by the present invention is that it is easy to clean the interior of the frame 21.

[0025] A first conduit 261 is provided on the first end cap 26, communicating with the cooling inlet 23. A second conduit 271 is provided on the second end cap 27, communicating with the cooling outlet 24. Both the first conduit 261 and the second conduit 271 extend outside the spindle housing body 1 and communicate with an external supply pipe. The first conduit 261 and the second conduit 271 are staggered relative to the centerline of the frame 21, ensuring a fluid-tight seal (e.g., a cooling water seal) between the cooling inlet 23 and the cooling outlet 24. In one configuration, the first and second conduits 261 and 271 protrude, and blind flange caps are secured to prevent flow through the first and second conduits 261 and 271. In other configurations, other plugs or seals may be used as needed.

[0026] The first pipe 261 and the second pipe 271 both protrude from the first head 26 and the second head 27, and are both provided with O-rings (not shown in the figure). The O-rings are used to seal and connect with the supply pipe (not shown in the figure) for cooling and exchanging heat with the lubricating oil to be cooled.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spindle box with a cooling structure, comprising a spindle box body and a spindle disposed within the spindle box body, an oil pump being connected to a side of the spindle box body, and an oil injection channel connected to the oil pump being provided on a side wall of the spindle box body, characterized in that: It also includes a cooling and heat exchange device arranged in the spindle box body for cooling the lubricating oil, the cooling and heat exchange device includes a frame with openings at both ends and a partition plate arranged in the frame, a cooling inlet and a cooling outlet are respectively provided at both ends of the frame, the partition plate extends from one end of the frame to the other end of the frame, and divides the inner cavity of the frame into a first flow channel connected to the cooling inlet and a second flow channel connected to the cooling outlet.

2. The spindle box with a cooling structure according to claim 1, characterized in that: At least one cooling auxiliary tube is provided on the side wall of the frame body, and the cooling auxiliary tube has a first opening connected to the first flow channel and a second opening connected to the second flow channel. The first opening and the second opening are arranged in the same direction on the side wall of the frame body, and the axis of the first opening is parallel to the axial direction of the second opening.

3. The spindle box with a cooling structure according to claim 2, characterized in that: The auxiliary cooling pipe has a U-shaped structure, and a connecting section of the auxiliary cooling pipe connecting the first opening and the second opening extends toward the lower end of the spindle box body to be immersed in the lubricating oil in the spindle box body.

4. The spindle box with a cooling structure according to claim 1, characterized in that: The cooling and heat exchange device further includes a first sealing head for opening and closing the cooling inlet and a second sealing head for opening and closing the cooling outlet.

5. The spindle box with a cooling structure according to claim 4, characterized in that: A first pipe connected to the cooling inlet is provided on the first head, and a second pipe connected to the cooling outlet is provided on the second head. Both the first pipe and the second pipe extend to the outside of the spindle box body and are connected to an external supply pipe.

6. The spindle box with a cooling structure according to claim 1, characterized in that: The frame is in any one of cylindrical, elliptical or square shapes.

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