Spindle head for numerical control machine tool

Abstract

The utility model belongs to the technical field of numerical control machine tools, and particularly relates to a spindle head for a numerical control machine tool, which comprises a spindle box body, the main shaft driving mechanism is arranged on one side of the main shaft box body and is used for driving the main shaft head to move; the bearing pack is arranged in the spindle box body and arranged on the spindle head in a sleeving manner; the water cooling mechanism is arranged at the top end of the spindle box body; the cooling water jacket is arranged in the main shaft box body and sleeves the main shaft head; the bearing cooling mechanism is arranged in the spindle box body and is positioned on the outer side of the bearing pack; wherein the water cooling mechanism can convey cooling water to the cooling water jacket, the bearing cooling mechanism can cool the bearing pack, and compared with the prior art, the working stability of the spindle head is improved, and the service life of the spindle head is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerically controlled machine tools, and in particular relates to a spindle head for numerically controlled machine tools. Background Art

[0002] The spindle head of a CNC machine tool is an important component of a CNC machine tool. It is responsible for driving the tool for rotary processing and providing the required speed and torque. For example, the patent with application number CN201410486497.2 discloses a mechanical four-output head spindle, which includes a housing, an input shaft, an input shaft gland, a large helical gear, four output spindles, a small end cover and a small helical gear; the input shaft is pivoted to the housing through a deep groove ball bearing and an angular contact ball bearing; the input shaft gland is sleeved on the input shaft and installed on the housing; the large helical gear is installed on the input shaft and driven by the input shaft; the four output spindles are arranged in a cross shape; each output spindle is pivoted to the housing through a single-row radial ball bearing and an angular contact ball bearing; a small helical gear is installed at one end of each output spindle, and the small helical gear is meshed with the large helical gear; the small end cover is sleeved on each output spindle and installed on the housing;

[0003] During the use of this existing CNC machine tool spindle head, the bearings of the spindle head are prone to heat up after long-term operation, and overheating of the bearings may cause thermal deformation of the bearings, and the lubrication on the bearings may fail due to excessive temperature, which in turn causes wear and damage to the bearings, causing noise and vibration when the spindle head is running, reducing the service life of the spindle head, so it is necessary to make improvements. Utility Model Content

[0004] The purpose of the utility model is to provide a spindle head for a CNC machine tool in order to improve the service life of the spindle head in view of the above-mentioned existing technical problems.

[0005] In view of this, the utility model provides a spindle head for a CNC machine tool, comprising:

[0006] A spindle housing, wherein a spindle head is arranged in the spindle housing;

[0007] A spindle drive mechanism, which is arranged on one side of the spindle housing and is used to drive the spindle head to move;

[0008] A bearing group, wherein the bearing group is arranged in the spindle housing and sleeved on the spindle head;

[0009] Also includes:

[0010] A water cooling mechanism, wherein the water cooling mechanism is arranged at the top of the spindle housing;

[0011] A cooling water jacket, the cooling water jacket is arranged in the spindle housing and sleeved on the spindle head;

[0012] A bearing cooling mechanism, the bearing cooling mechanism is arranged in the spindle housing and is located outside the bearing group;

[0013] Wherein, the water cooling mechanism can deliver cooling water to the cooling water jacket, and the bearing cooling mechanism can cool the bearing group.

[0014] In the present technical solution, during the operation of the spindle head, the water cooling mechanism can transport cooling water to the cooling water jacket to cool the spindle head, preventing the spindle head from overheating, thereby improving the working stability and service life of the spindle head. At the same time, the bearing cooling mechanism can cool the bearing group on the spindle head to prevent the bearing group from thermal deformation and lubrication failure due to overheating, thereby preventing noise and vibration during the operation of the spindle head, further improving the working stability and service life of the spindle head.

[0015] In the above technical solution, further, the bearing cooling mechanism also includes:

[0016] The arc-shaped cooling fins are arranged on the outside of the bearing group and are distributed concentrically with the bearings.

[0017] In the above technical solution, further, the arc-shaped cooling fin also includes:

[0018] An outer substrate, wherein first connection holes are arranged at both ends of the outer substrate, and refrigeration semiconductors are evenly distributed on the inner surface of the outer substrate;

[0019] Support members, the support members are arranged on the inner surface of the outer substrate and are symmetrically distributed along the arc direction of the outer substrate;

[0020] An inner substrate, wherein the connecting section of the inner substrate is provided with a second connecting hole;

[0021] Wherein, the outer substrate and the inner substrate are both made of heat-conducting materials, and the thickness of the support member is greater than the thickness of the refrigeration semiconductor.

[0022] In the above technical solution, further, the bearing cooling mechanism also includes:

[0023] A cooling water pipe, wherein the cooling water pipe is arranged in a disc shape in the outer substrate;

[0024] Wherein, the water cooling mechanism can transport cooling water to the cooling water pipe.

[0025] In the above technical solution, further, the bearing cooling mechanism also includes:

[0026] A heat sink group, the heat sink group is arranged on the outer surface of the outer substrate;

[0027] Wherein, a heat dissipation hole for the heat sink group to pass through is opened on the spindle housing, and the outer end of the heat sink group passes through the heat dissipation hole and is arranged on the outer side of the spindle housing.

[0028] In the above technical solution, further, it also includes:

[0029] A support gasket is fixedly arranged on the surface of the support member.

[0030] The beneficial effects of the utility model are:

[0031] 1. The setting of cooling water jacket and bearing cooling mechanism can effectively prevent the spindle head and bearing group from overheating, thereby increasing the service life of the spindle head;

[0032] 2. The arrangement of the arc-shaped cooling fins can effectively improve the cooling effect of the bearing group. At the same time, the arrangement of the support members can make the arc-shaped cooling fins have higher pressure-bearing performance, and can prevent the cooling semiconductors in the arc-shaped cooling fins from being damaged due to the movement of the bearing group;

[0033] 3. Through the combined action of the cooling water pipe and the heat sink group, the arc-shaped cooling fin can be water-cooled and air-cooled at the same time, thereby improving the working stability of the arc-shaped cooling fin and further preventing the bearing group from overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 It is a schematic structural diagram of a specific implementation method of the utility model.

[0036] Figure 2 It is a schematic diagram of the cross-sectional structure of the spindle box of the utility model.

[0037] Figure 3 This is a schematic diagram of the bearing cooling mechanism structure of the utility model.

[0038] Figure 4 This is a schematic diagram of the exploded view of the bearing cooling mechanism of the utility model.

[0039] Figure 5 This is a schematic diagram of the cooling water pipe structure of the utility model.

[0040] The symbols in the figure are:

[0041] 1. Spindle housing; 2. Spindle head; 3. Spindle drive mechanism; 4. Bearing group; 5. Water cooling mechanism; 6. Cooling water jacket; 7. Bearing cooling mechanism; 8. Arc-shaped cooling fin; 80. Outer substrate; 81. First connecting hole; 82. Refrigeration semiconductor; 83. Support member; 84. Inner substrate; 85. Second connecting hole; 9. Cooling water pipe; 10. Heat sink group; 11. Support gasket. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0044] Embodiment 1:

[0045] The embodiment of the present application provides a spindle head 2 for a CNC machine tool, comprising: a spindle housing 1, in which the spindle head 2 is arranged; a spindle drive mechanism 3, which is arranged on one side of the spindle housing 1 and is used to drive the spindle head 2 to move; a bearing group 4, which is arranged in the spindle housing 1 and sleeved on the spindle head 2;

[0046] The main structure of the spindle housing 1 is also provided with a water cooling mechanism 5, which is arranged at the top of the spindle housing 1; a cooling water jacket 6, which is arranged in the spindle housing 1 and sleeved on the spindle head 2; a bearing cooling mechanism 7, which is arranged in the spindle housing 1 and located on the outside of the bearing group 4;

[0047] The water cooling mechanism 5 can deliver cooling water to the cooling water jacket 6 , and the bearing cooling mechanism 7 can cool the bearing group 4 .

[0048] Moreover, the cooling water jacket 6 is located above the bearing group 4, the water cooling mechanism 5 is an existing conventional structure, the cooling water jacket 6 includes an annular shell and a spiral water groove located in the annular shell, and the spindle housing 1, spindle head 2, bearing group 4 and spindle drive mechanism 3 are all existing conventional structures.

[0049] In the present embodiment, during the operation of the spindle head 2, the water cooling mechanism 5 can transport cooling water to the cooling water jacket 6 to cool the spindle head 2, thereby preventing the spindle head 2 from overheating, thereby improving the working stability and service life of the spindle head 2. At the same time, the bearing cooling mechanism 7 can cool the bearing group 4 on the spindle head 2, thereby preventing the bearing group 4 from thermal deformation and lubrication failure due to overheating, thereby preventing the spindle head 2 from generating noise and vibration during operation, thereby further improving the working stability and service life of the spindle head 2.

[0050] Embodiment 2:

[0051] This embodiment provides a spindle head 2 for a CNC machine tool. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the bearing cooling mechanism 7 also includes: arc-shaped cooling fins 8, which are arranged on the outside of the bearing group 4 and are concentrically distributed with the bearing.

[0052] The arc-shaped cooling plate 8 further comprises: an outer substrate 80, with first connection holes 81 disposed at both ends of the outer substrate 80, and cooling semiconductors 82 evenly distributed on the inner surface of the outer substrate 80; a support member 83, which is disposed on the inner surface of the outer substrate 80 and symmetrically distributed along the arc direction of the outer substrate 80; and an inner substrate 84, with a second connection hole 85 disposed in the connecting section of the inner substrate 84;

[0053] The outer substrate 80 and the inner substrate 84 are both made of heat-conducting materials, and the thickness of the support member 83 is greater than the thickness of the cooling semiconductor 82 .

[0054] It also includes: a supporting gasket 11 , which is fixedly arranged on the surface of the supporting member 83 .

[0055] In this embodiment, during the operation of the spindle head 2, the inner surface of the cooling semiconductor 82 is a cold source, and the heat generated during the operation of the bearing group 4 is effectively absorbed by the cooling semiconductor 82, thereby preventing the bearing group 4 from overheating. In addition, cooling the bearing group 4 by the cooling semiconductor 82 has the characteristics of fast cooling speed and stable cooling effect. At the same time, through the setting of the support member 83, the cooling semiconductor 82 is located between the outer substrate 80 and the inner substrate 84. The support member 83 can effectively improve the pressure-bearing performance of the arc-shaped cooling plate 8, thereby preventing the cooling semiconductor 82 from being squeezed and damaged due to the movement of the bearing group 4.

[0056] Embodiment 3:

[0057] This embodiment provides a spindle head 2 for a CNC machine tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the bearing cooling mechanism 7 also includes: a cooling water pipe 9, which is arranged in a disc shape in the outer substrate 80;

[0058] The water cooling mechanism 5 can deliver cooling water to the cooling water pipe 9 .

[0059] The bearing cooling mechanism 7 further includes: a heat sink group 10, which is arranged on the outer surface of the outer substrate 80;

[0060] The spindle housing 1 is provided with heat dissipation holes for the heat sink group 10 to pass through, and the outer ends of the heat sink group 10 pass through the heat dissipation holes and are arranged on the outer side of the spindle housing 1 .

[0061] In this embodiment, the combined effect of the cooling water pipe 9 and the heat sink assembly 10 enables the arc-shaped cooling fin 8 to be water-cooled and air-cooled at the same time, thereby improving the working stability of the arc-shaped cooling fin 8 and further preventing the bearing assembly 4 from overheating.

[0062] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A spindle head (2) for a numerically controlled machine tool, comprising: A spindle housing (1), wherein a spindle head (2) is arranged in the spindle housing (1); A spindle drive mechanism (3), the spindle drive mechanism (3) being arranged on one side of the spindle housing (1) and used for driving the spindle head (2) to move; A bearing group (4), wherein the bearing group (4) is arranged in the spindle housing (1) and sleeved on the spindle head (2); It is characterized by further comprising: A water cooling mechanism (5), wherein the water cooling mechanism (5) is arranged at the top end of the spindle housing (1); A cooling water jacket (6), wherein the cooling water jacket (6) is arranged in the spindle housing (1) and sleeved on the spindle head (2); A bearing cooling mechanism (7), wherein the bearing cooling mechanism (7) is arranged in the spindle housing (1) and is located outside the bearing group (4); The water cooling mechanism (5) can deliver cooling water to the cooling water jacket (6), and the bearing cooling mechanism (7) can cool the bearing group (4).

2. A spindle head (2) for a CNC machine tool according to claim 1, characterized in that: The bearing cooling mechanism (7) further comprises: An arc-shaped cooling fin (8) is arranged outside the bearing group (4) and is distributed concentrically with the bearing.

3. A spindle head (2) for a CNC machine tool according to claim 2, characterized in that: The arc-shaped refrigeration fin (8) further comprises: An outer substrate (80), wherein first connection holes (81) are provided at both ends of the outer substrate (80), and cooling semiconductors (82) are evenly distributed on the inner surface of the outer substrate (80); Support members (83), the support members (83) being arranged on the inner surface of the outer substrate (80) and symmetrically distributed along the arc direction of the outer substrate (80); An inner substrate (84), wherein a connecting section of the inner substrate (84) is provided with a second connecting hole (85); Wherein, the outer substrate (80) and the inner substrate (84) are both made of heat-conducting materials, and the thickness of the support member (83) is greater than the thickness of the refrigeration semiconductor (82).

4. A spindle head (2) for a CNC machine tool according to claim 3, characterized in that: The bearing cooling mechanism (7) further comprises: A cooling water pipe (9), the cooling water pipe (9) being arranged in a disc shape in the outer substrate (80); Wherein, the water cooling mechanism (5) can transport cooling water to the cooling water pipe (9).

5. A spindle head (2) for a CNC machine tool according to claim 4, characterized in that: The bearing cooling mechanism (7) further comprises: A heat sink group (10), the heat sink group (10) being arranged on the outer surface of the outer substrate (80); The spindle housing (1) is provided with a heat dissipation hole for the heat sink group (10) to pass through, and the outer end of the heat sink group (10) passes through the heat dissipation hole and is arranged on the outside of the spindle housing (1).

6. A spindle head (2) for a CNC machine tool according to claim 3, characterized in that: Also includes: A support gasket (11), wherein the support gasket (11) is fixedly arranged on the surface of the support member (83).

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