Electric spindle cooling structure and electric spindle

Abstract

The utility model belongs to the technical field of motorized spindles, and particularly relates to a motorized spindle cooling structure and a motorized spindle. The main shaft outer sleeve is provided with a communicating groove formed in the inner side of the main shaft outer sleeve in the circumferential direction, a first spiral groove spirally formed in the inner side of the main shaft outer sleeve in the circumferential direction and communicating with the communicating groove, and a second spiral groove spirally formed in the inner side of the main shaft outer sleeve in the circumferential direction and communicating with the communicating groove. The liquid inlet channel is arranged on the main shaft outer sleeve in the axial direction, one end of the liquid inlet channel is communicated with the first spiral groove, the liquid outlet channel is arranged on the main shaft outer sleeve in the axial direction, and one end of the liquid outlet channel is communicated with the second spiral groove. The flow channel is formed in the inner side of the main shaft outer sleeve, so that the overall outer circle size of the electric main shaft is smaller, and meanwhile, the other end of the liquid inlet channel and the other end of the liquid outlet channel penetrate through the front end of the main shaft outer sleeve so as to be externally connected with a cooling pipeline.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric spindles, and in particular relates to an electric spindle cooling structure and the electric spindle. Background Art

[0002] As the core component of modern CNC machine tools, the electric spindle generates a lot of heat in the actual high-speed cutting process. Therefore, a cooling structure is required to cool the electric spindle. The existing electric spindle cooling structure generally sets the cooling pipe on the outer circle of the motor stator, and cools the temperature by supplying coolant to the cooling pipe, which increases the overall outer circle size. The flow channels of the existing cooling structure are generally axial flow channels or circumferential flow channels. The circumferential flow channels have a better cooling effect, but the inlet and outlet of the circumferential flow channels are located at opposite ends of the axial direction of the cooling jacket, which is not convenient for external cooling pipes. Summary of the Invention

[0003] The utility model aims to provide an electric spindle with a smaller overall outer diameter and a liquid inlet channel and a liquid outlet channel arranged at the same end of a spindle outer shell so as to facilitate external connection with a cooling pipeline.

[0004] The utility model is realized by the following technical solutions:

[0005] An electric spindle cooling structure includes a spindle outer shell, wherein the spindle outer shell is provided with:

[0006] A communicating groove is circumferentially arranged on the inner side of the main shaft outer sleeve;

[0007] A first spiral groove is spirally arranged on the inner side of the main shaft outer sleeve along the circumferential direction and is connected to the connecting groove;

[0008] A second spiral groove is spirally arranged on the inner side of the main shaft outer sleeve along the circumferential direction and is connected to the connecting groove;

[0009] a liquid inlet channel, which is axially arranged on the main shaft outer sleeve, with one end connected to the first spiral groove and the other end passing through the front end of the main shaft outer sleeve;

[0010] The liquid outlet channel is axially arranged on the main shaft outer sleeve, with one end being connected to the second spiral groove and the other end penetrating the front end of the main shaft outer sleeve.

[0011] In the above-mentioned electric spindle cooling structure, the first spiral groove and the second spiral groove are arranged in parallel.

[0012] In the above-mentioned electric spindle cooling structure, the first spiral groove and the second spiral groove are arranged crosswise.

[0013] In the above-mentioned electric spindle cooling structure, a flange connection plate is provided at one end of the spindle outer casing away from the liquid inlet channel and the liquid outlet channel.

[0014] An electric spindle includes the electric spindle cooling structure as described above, and also includes a motor shaft coaxially inserted into the spindle outer sleeve, and a motor stator sleeved between the motor shaft and the spindle outer sleeve, a first cooling channel is formed between the connecting groove and the outer side of the motor stator, a second cooling channel connected to the first cooling channel is formed between the first spiral groove and the outer side of the motor stator, a third cooling channel connected to the first cooling channel is formed between the second spiral groove and the outer side of the motor stator, one end of the liquid inlet channel is connected to the second cooling channel, and one end of the liquid outlet channel is connected to the third cooling channel.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The utility model provides an electric spindle cooling structure, including a spindle outer sleeve, which is provided with: a connecting groove circumferentially arranged on the inner side of the spindle outer sleeve, a first spiral groove circumferentially spirally arranged on the inner side of the spindle outer sleeve and connected to the connecting groove, a second spiral groove circumferentially spirally arranged on the inner side of the spindle outer sleeve and connected to the connecting groove, a liquid inlet channel axially arranged on the spindle outer sleeve and connected to the first spiral groove at one end, and a liquid outlet channel axially arranged on the spindle outer sleeve and connected to the second spiral groove at one end. When in use, coolant enters from the liquid inlet channel and flows through the first spiral groove, the connecting groove and the second spiral groove in sequence, and finally flows out from the liquid outlet channel. The flow channel is formed on the inner side of the spindle outer sleeve, so that the overall outer diameter of the electric spindle is smaller. At the same time, the other ends of the liquid inlet channel and the liquid outlet channel both pass through the front end of the spindle outer sleeve to facilitate external cooling pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0018] Figure 1 This is a schematic cross-sectional view of the main shaft housing in the first embodiment of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the electric spindle in the first embodiment of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the main shaft outer sleeve in the second specific embodiment of the present invention;

[0021] Figure 4 This is a schematic cross-sectional structural diagram of the electric spindle in specific embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] When the embodiments of the present invention mention ordinal numbers such as "first" and "second", unless they do express the meaning of order according to the context, they should be understood as being merely for the purpose of distinction.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] Specific embodiment 1, as Figure 1-2 The electric spindle cooling structure shown includes a spindle outer sleeve 1, and the spindle outer sleeve 1 is provided with: a connecting groove 2, which is circumferentially arranged on the inner side of the spindle outer sleeve 1; a first spiral groove 3, which is spirally arranged on the inner side of the spindle outer sleeve 1 along the circumferential direction and is connected with the connecting groove 2; a second spiral groove 4, which is spirally arranged on the inner side of the spindle outer sleeve 1 along the circumferential direction and is connected with the connecting groove 2; a liquid inlet channel 5, which is axially arranged on the spindle outer sleeve 1, and one end is connected with the first spiral groove 3, and the other end passes through the front end of the spindle outer sleeve 1; a liquid outlet channel 6, which is axially arranged on the spindle outer sleeve 1, and one end is connected with the second spiral groove 4, and the other end passes through the front end of the spindle outer sleeve 1. During use, the coolant enters from the liquid inlet channel and flows through the first spiral groove, the connecting groove and the second spiral groove in sequence, and finally flows out from the liquid outlet channel. The flow channel is formed on the inner side of the spindle housing, making the overall outer circle size of the electric spindle smaller. At the same time, the other ends of the liquid inlet channel and the liquid outlet channel both pass through the front end of the spindle housing, and the liquid inlet channel and the liquid outlet channel are arranged at the same end to facilitate external cooling pipes.

[0026] Specifically, the first spiral grooves 3 and the second spiral grooves 4 are arranged crosswise.

[0027] In addition, the spindle housing 1 is provided with a flange connection plate 7 at one end away from the liquid inlet channel 5 and the liquid outlet channel 6. To facilitate assembly. Specifically, the flange connection plate 7 is integrally formed on the spindle housing 1, making production more convenient.

[0028] The present utility model also provides an electric spindle, comprising the electric spindle cooling structure as described above, and also comprising a motor shaft 8 coaxially inserted into the spindle housing 1, and a motor stator 9 sleeved between the motor shaft 8 and the spindle housing 1, a first cooling channel 10 is formed between the connecting groove 2 and the outer side of the motor stator 9, a second cooling channel 11 connected to the first cooling channel 10 is formed between the first spiral groove 3 and the outer side of the motor stator 9, a third cooling channel 12 connected to the first cooling channel 10 is formed between the second spiral groove 4 and the outer side of the motor stator 9, one end of the liquid inlet channel 5 is connected to the second cooling channel 11, and one end of the liquid outlet channel 6 is connected to the third cooling channel 12.

[0029] Specific embodiment 2 is different from specific embodiment 1 in that Figure 3 、 Figure 4 As shown, the first spiral groove 3 and the second spiral groove 4 are arranged in parallel.

[0030] The above is an implementation method provided in conjunction with specific content, and does not necessarily mean that the specific implementation of this utility model is limited to these descriptions. At the same time, due to differences in industry nomenclature, it is not limited to the above nomenclature, nor is it limited to English nomenclature. Any method, structure, etc. similar to or identical to the method, structure, etc. of this utility model, or any technical deduction or replacement based on the concept of this utility model, shall be considered within the scope of protection of this utility model.

Claims

1. An electric spindle cooling structure, characterized in that: It comprises a main shaft outer shell (1), on which the main shaft outer shell (1) is provided: A communicating groove (2) is circumferentially arranged on the inner side of the main shaft outer sleeve (1); A first spiral groove (3) is spirally arranged on the inner side of the main shaft outer sleeve (1) along the circumferential direction and is connected to the connecting groove (2); A second spiral groove (4) is spirally arranged on the inner side of the main shaft outer sleeve (1) along the circumferential direction and is connected to the connecting groove (2); A liquid inlet channel (5) is axially arranged on the main shaft outer sleeve (1), with one end being connected to the first spiral groove (3) and the other end penetrating the front end of the main shaft outer sleeve (1); The liquid outlet channel (6) is axially arranged on the main shaft outer sleeve (1), with one end being connected to the second spiral groove (4) and the other end penetrating the front end of the main shaft outer sleeve (1).

2. The electric spindle cooling structure according to claim 1, characterized in that: The first spiral groove (3) and the second spiral groove (4) are arranged in parallel.

3. The electric spindle cooling structure according to claim 1, characterized in that: The first spiral groove (3) and the second spiral groove (4) are arranged crosswise.

4. The electric spindle cooling structure according to claim 1, characterized in that: A flange connection plate (7) is provided at one end of the main shaft outer sleeve (1) away from the liquid inlet channel (5) and the liquid outlet channel (6).

5. An electric spindle, characterized in that: The electric spindle cooling structure comprises the electric spindle cooling structure as described in any one of claims 1 to 4, and also comprises a motor shaft (8) coaxially inserted into the spindle housing (1), and a motor stator (9) sleeved between the motor shaft (8) and the spindle housing (1), a first cooling channel (10) is formed between the connecting groove (2) and the outer side of the motor stator (9), a second cooling channel (11) connected to the first cooling channel (10) is formed between the first spiral groove (3) and the outer side of the motor stator (9), a third cooling channel (12) connected to the first cooling channel (10) is formed between the second spiral groove (4) and the outer side of the motor stator (9), one end of the liquid inlet channel (5) is connected to the second cooling channel (11), and one end of the liquid outlet channel (6) is connected to the third cooling channel (12).

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