Translation power device and numerical control machine tool

Abstract

The utility model belongs to the technical field of numerical control machine tools, and discloses a translation power device and a numerical control machine tool, and the translation power device comprises a motor assembly which comprises a rotating motor, a motor installation plate and a cooling plate, the rotating motor is installed on the motor installation plate, and the cooling plate abuts against the motor installation plate; a first cooling liquid channel is formed between the cooling plate and the motor mounting plate; the lead screw nut assembly comprises a transmission lead screw and a transmission nut which are in threaded connection, the transmission lead screw is connected with a rotating shaft of the rotating motor, the transmission nut is used for being connected with the workbench, and a second cooling liquid channel extending in the same direction as the transmission lead screw is arranged in the transmission lead screw. The translation power device provided by the utility model can ensure the safe operation of the rotating motor, alleviate the thermal expansion phenomenon of the motor assembly and the screw nut assembly, improve the translation precision of the workbench, and further improve the machining precision of the numerical control machine tool.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled machine tools, in particular to a translational power device and a numerically controlled machine tool. Background Art

[0002] CNC machine tools, full name digital control machine tools, are automated equipment that use digital technology to control the movement and processing of machine tools through preset programs.

[0003] The power system is a crucial component of CNC machine tools, driving the spindle and worktable. Their coordinated operation directly determines the machine's machining efficiency and finished product quality. Typically, the worktable's translational motion is achieved through a motor and a lead screw nut. Continuous motor operation generates significant heat, while the high-speed rotation and sliding friction of the lead screw nut also cause heat accumulation. This accumulated heat not only causes the motor and lead screw nut to heat up, but can also cause thermal expansion of materials, altering the geometry and relative position of machine tool components, and negatively impacting machining accuracy.

[0004] Therefore, a kind of translational power device and numerical control machine tool are in urgent need of, to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a translational power device and a CNC machine tool, which can ensure the safe operation of the rotating motor, reduce the thermal expansion of the motor assembly and the screw nut assembly, improve the translation accuracy of the workbench, and thus improve the processing accuracy of the CNC machine tool.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, a translational power device is provided, comprising:

[0008] A motor assembly comprising a rotating motor, a motor mounting plate, and a cooling plate, wherein the rotating motor is mounted on the motor mounting plate, the cooling plate abuts against the motor mounting plate, and a first cooling liquid channel is formed between the cooling plate and the motor mounting plate;

[0009] The screw-nut assembly comprises a threaded transmission screw and a transmission nut, wherein the transmission screw is connected to the rotating shaft of the rotary motor, the transmission nut is used to connect to the workbench, and a second cooling liquid channel extending in the same direction as the transmission screw is provided in the transmission screw.

[0010] Preferably, a first avoidance hole is provided on the motor mounting plate, the cooling plate is installed on the first avoidance hole, a second avoidance hole for the rotating shaft to pass through is provided on the cooling plate, and the first cooling liquid channel is formed between the hole wall of the first avoidance hole and the outer peripheral wall of the cooling plate.

[0011] Preferably, the cooling plate is provided with a cooling groove extending around its outer peripheral wall, and the cooling groove and the hole wall of the first avoidance hole are arranged to form the first cooling liquid channel.

[0012] Preferably, the cooling groove is configured as a spiral groove structure wound along a spiral curve around the outer peripheral wall of the cooling plate; or

[0013] The cooling groove includes at least two annular grooves that are interconnected, and along the axis direction of the second avoidance hole, at least two of the annular grooves are distributed at intervals.

[0014] Preferably, sealing grooves are provided on opposite sides of the cooling groove along the axial direction of the second avoidance hole, and sealing rings are embedded in the sealing grooves. The sealing rings are used to seal the gap between the hole wall of the first avoidance hole and the outer peripheral wall of the cooling plate.

[0015] Preferably, the motor mounting plate is provided with a liquid inlet channel and a liquid outlet channel, one end of the liquid inlet channel is connected to the first cooling liquid channel, the other end of the liquid inlet channel is connected to the external cooling liquid supply pipeline, one end of the liquid outlet channel is connected to the first cooling liquid channel, and the other end of the liquid outlet channel is connected to the external cooling liquid return pipeline.

[0016] Preferably, the screw-nut assembly further includes a first bearing and a second bearing, a first cooling and lubrication cavity is provided at the first end of the transmission screw, the first bearing is provided in the first cooling and lubrication cavity and is sleeved on the transmission screw, a second cooling and lubrication cavity is provided at the second end of the transmission screw, the second bearing is provided in the second cooling and lubrication cavity and is sleeved on the transmission screw, one end of the second cooling liquid channel is connected to the first cooling and lubrication cavity, and the other end of the second cooling liquid channel is connected to the second cooling and lubrication cavity.

[0017] Preferably, the screw nut assembly further comprises:

[0018] a first bearing seat, sleeved on the transmission screw and forming the first cooling and lubricating cavity therebetween; an outer ring of the first bearing fixed to the first bearing seat; a liquid inlet hole communicating with the first cooling and lubricating cavity is provided on the first bearing seat, the liquid inlet hole being used for liquid inlet;

[0019] The second bearing seat is sleeved on the transmission screw and forms the second cooling and lubrication cavity therebetween. The outer ring of the second bearing is fixed to the second bearing seat. The second bearing seat is provided with a liquid outlet connected to the second cooling and lubrication cavity, and the liquid outlet is used for liquid discharge.

[0020] Preferably, the screw-nut assembly also includes an end cover, which is sealed and connected to the second bearing seat. The end cover is provided with a cavity structure connected to the inner cavity of the second bearing seat, and the second cooling liquid channel passes through the end of the second end of the transmission screw and is connected to the cavity structure.

[0021] In a second aspect, a CNC machine tool is provided, comprising a machine base, a worktable and the above-mentioned translational force device, wherein the translational force device is mounted on the machine base, the worktable is mounted on the machine base for sliding along a horizontal direction, and the worktable is connected to the transmission nut.

[0022] Beneficial effects of the utility model:

[0023] The translational force device provided by the present invention outputs rotational power to the screw-nut assembly through the motor assembly, and the screw-nut assembly converts the rotational power into the translational force of the workbench. On the one hand, in the motor assembly, a first cooling liquid channel is formed between the cooling plate and the motor mounting plate. When the first cooling liquid channel is filled with coolant, the coolant can promptly take away the heat of the motor mounting plate and cool the rotating motor through the motor mounting plate; on the other hand, a second cooling liquid channel extending in the same direction as the transmission screw is provided. When the second cooling liquid channel is filled with cooling oil, the cooling oil can promptly take away the heat of the transmission screw, thereby cooling the screw-nut assembly. In summary, the translational force device provided by the present invention can effectively cool the rotating motor, the motor plate and the screw-nut assembly, while ensuring the safe operation of the rotating motor, reducing the thermal expansion phenomenon of the motor assembly and the screw-nut assembly, thereby improving the translational accuracy of the workbench, and further improving the processing accuracy of the CNC machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the translational power device provided by the present utility model;

[0025] Figure 2 It is a cross-sectional view of the motor assembly provided by the present utility model;

[0026] Figure 3 This is a schematic structural diagram of the cooling plate provided by the present invention;

[0027] Figure 4 This is a cross-sectional view of the screw nut assembly provided by the utility model;

[0028] Figure 5 This is a schematic diagram of the installation structure of one end of the transmission screw provided by the utility model;

[0029] Figure 6 It is a schematic diagram of the installation structure of the other end of the transmission screw provided by the utility model.

[0030] In the picture:

[0031] 100, motor assembly; 200, screw nut assembly; 10, first cooling liquid channel; 20, first cooling and lubrication cavity; 30, second cooling and lubrication cavity;

[0032] 1. Rotating motor; 101. Rotating shaft; 2. Motor mounting plate; 201. Liquid inlet channel; 202. Liquid outlet channel; 3. Cooling plate; 31. Second avoidance hole; 32. Cooling groove; 321. Annular groove; 33. Sealing groove; 4. Sealing ring; 5. Drive screw; 51. Second cooling liquid channel; 52. Screw opening; 6. Drive nut; 7. First bearing; 8. Second bearing; 9. First bearing seat; 91. First mounting plate; 92. First limiting sleeve; 93. First sealing sleeve; 11. Second bearing Seat; 111, second mounting plate; 112, second limiting sleeve; 113, second sealing sleeve; 12, end cover; 121, cavity structure; 131, first static sealing ring; 132, second static sealing ring; 133, third static sealing ring; 141, first rotating sealing ring; 142, second rotating sealing ring; 151, fourth static sealing ring; 152, fifth static sealing ring; 153, sixth static sealing ring; 16, third rotating sealing ring; 17, coupling; 18, first locking ring; 19, second locking ring. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction 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.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] This embodiment provides a CNC machine tool, which includes a machine base, a workbench, and a translational force device. It is understood that the machine base can be, for example, the bed of the machine tool. The translational force device is mounted on the machine base, and the workbench is mounted on the machine base in a horizontal sliding manner. The workbench is connected to the output end of the translational force device through transmission, and the translational force device is used to drive the workbench to move horizontally. Figures 1-6 As shown, the translational power device includes a motor assembly 100 and a screw-nut assembly 200. The motor assembly 100 includes a rotating motor 1. The screw-nut assembly 200 includes a threaded transmission screw 5 and a transmission nut 6. The transmission screw 5 is connected to the rotating shaft 101 of the rotating motor 1 through a coupling 17, and the workbench is connected to the transmission nut 6.

[0038] Further, such as Figures 1-6 As shown, the motor assembly 100 also includes a motor mounting plate 2 and a cooling plate 3. The rotating motor 1 is mounted on the motor mounting plate 2. The cooling plate 3 is against the motor mounting plate 2, and a first cooling liquid channel 10 is formed between the cooling plate 3 and the motor mounting plate 2. A second cooling liquid channel 51 extending in the same direction as the transmission screw 5 is provided in the transmission screw 5. An external cooling device can circulate cooling water or other coolant into the first cooling liquid channel 10, and another cooling device can circulate cooling oil into the second cooling liquid channel 51.

[0039] Specifically, the CNC machine tool provided in this embodiment drives the worktable to move horizontally through a translational force device. The translational force device outputs rotational power to the screw-nut assembly 200 through the motor assembly 100. The screw-nut assembly 200 converts the rotational power into a translational force for the worktable. On the one hand, in the motor assembly 100, a first cooling liquid channel 10 is formed between the cooling plate 3 and the motor mounting plate 2. When the first cooling liquid channel 10 is filled with coolant, the coolant can promptly remove the heat from the motor mounting plate 2 and cool the rotating motor 1 through the motor mounting plate 2. On the other hand, a second cooling liquid channel 51 extending in the same direction as the transmission screw 5 is provided in the transmission screw 5. When the second cooling liquid channel 51 is filled with cooling oil, the cooling oil can promptly remove the heat from the transmission screw 5, thereby cooling the screw-nut assembly 200. In summary, through the setting of the first cooling liquid channel 10 and the second cooling liquid channel 51, the translational power device can effectively cool the rotating motor 1, the motor plate and the screw nut assembly 200, while ensuring the safe operation of the rotating motor 1, reducing the thermal expansion of the motor assembly 100 and the screw nut assembly 200, thereby improving the translation accuracy of the workbench and further improving the processing accuracy of the CNC machine tool.

[0040] For example, Figure 1 and Figure 2 As shown, the rotating motor 1 is mounted to the motor mounting plate 2 via fastening bolts. A first avoidance hole is provided on the motor mounting plate 2, and a cooling plate 3 is mounted within the first avoidance hole. A second avoidance hole 31 is provided on the cooling plate 3 for the rotation shaft 101 to pass through. The second avoidance hole 31 is coaxially arranged with the first avoidance hole. A first cooling liquid channel 10 is formed between the hole wall of the first avoidance hole and the outer peripheral wall of the cooling plate 3. Because the rotating motor 1 is locked to the motor mounting plate 2, the end face of the rotating motor 1 is pressed against the motor mounting plate 2, allowing effective heat conduction between the rotating motor 1 and the motor mounting plate 2. Heat generated by the rotating motor 1 can be transferred to the motor mounting plate 2 and then carried away by the coolant in the first cooling liquid channel 10. The thermal expansion of the motor mounting plate 2 itself is also very small, which can effectively control the installation position of the rotating motor 1.

[0041] For example, Figure 2 and Figure 3 As shown, the cooling plate 3 is provided with a cooling groove 32 extending around its outer peripheral wall. The cooling groove 32 and the hole wall of the first avoidance hole are surrounded to form the first cooling liquid channel 10.

[0042] Further, such as Figure 2 and Figure 3The cooling groove 32 shown includes at least two interconnected annular channels 321 spaced apart along the axis of the second avoidance hole 31. This multi-ring structure extends the length of the first cooling channel 10, extending the coolant flow path within the first cooling channel 10 and enhancing heat exchange, thereby improving the cooling effect on the rotating electric machine 1 and the motor mounting plate 2. In this embodiment, the cooling groove 32 includes two interconnected annular channels 321, which are connected by a channel extending through the annular wall between them.

[0043] In some embodiments, the cooling groove 32 can also be configured as a spiral groove structure wound along a spiral curve around the outer wall of the cooling plate 3, and the coolant enters from one end of the spiral groove structure and flows out from the other end of the spiral groove structure.

[0044] For example, Figure 2 As shown, the motor mounting plate 2 is provided with a liquid inlet channel 201 and a liquid outlet channel 202. One end of the liquid inlet channel 201 is connected to the first cooling liquid channel 10, and the other end of the liquid inlet channel 201 is connected to the external coolant supply pipeline. One end of the liquid outlet channel 202 is connected to the first cooling liquid channel 10, and the other end of the liquid outlet channel 202 is connected to the external coolant return pipeline. Optionally, the liquid inlet channel 201 is connected to one end of the cooling tank 32, and the liquid outlet channel 202 is connected to the other end of the cooling tank 32.

[0045] Preferably, Figure 2 As shown, in this embodiment, the liquid inlet channel 201 is connected to one of the annular grooves 321, and the liquid outlet channel 202 is connected to the other annular groove 321 to ensure that the coolant can flow completely through the entire path of the first cooling liquid channel 10, thereby achieving a sufficient heat exchange effect.

[0046] For example, Figure 2 and Figure 3 As shown, along the axial direction of the second avoidance hole 31, sealing grooves 33 are respectively provided on the opposite sides of the cooling groove 32, or the cooling groove 32 is located between the two sealing grooves 33, and a sealing ring 4 is embedded in the sealing groove 33. The sealing ring 4 is used to seal the gap between the hole wall of the first avoidance hole and the outer peripheral wall of the cooling plate 3 to prevent the coolant in the first cooling liquid channel 10 from leaking from the gap between the motor mounting plate 2 and the cooling plate 3.

[0047] Exemplarily, the sealing ring 4 is a static sealing ring made of a high-temperature-resistant and corrosion-resistant elastic material such as rubber.

[0048] For example, Figure 4-Figure 6As shown, the screw-nut assembly 200 also includes a first bearing 7 and a second bearing 8. A first cooling and lubrication chamber 20 is provided at the first end of the transmission screw 5. The first bearing 7 is provided in the first cooling and lubrication chamber 20 and is sleeved on the transmission screw 5. A second cooling and lubrication chamber 30 is provided at the second end of the transmission screw 5. The second bearing 8 is provided in the second cooling and lubrication chamber 30 and is sleeved on the transmission screw 5. One end of the second cooling liquid channel 51 is connected to the first cooling and lubrication chamber 20, and the other end of the second cooling liquid channel 51 is connected to the second cooling and lubrication chamber 30.

[0049] Specifically, when the external cooling device passes cooling oil into the second cooling liquid channel 51, the cooling oil can also flow to the installation position of the first bearing 7 and the second bearing 8, thereby directly exchanging heat with the first bearing 7 and the second bearing 8 to reduce the temperature of the first bearing 7 and the second bearing 8, greatly reducing the thermal expansion effect of the first bearing 7 and the second bearing 8, improving the installation accuracy of the transmission screw 5, and lubricating the first bearing 7 and the second bearing 8.

[0050] For example, Figure 4 and Figure 5 As shown, the screw-nut assembly 200 further includes a first bearing seat 9, which is sleeved on the transmission screw 5 and forms a first cooling and lubrication cavity 20 therebetween. The outer ring of the first bearing 7 is fixed to the first bearing seat 9. The first bearing seat 9 is provided with a liquid inlet hole connected to the first cooling and lubrication cavity 20, and the liquid inlet hole is used to allow liquid to enter. Specifically, two first bearings 7 are arranged side by side. The first bearing seat 9 and the first mounting plate 91 jointly lock the outer rings of the two first bearings 7. The first bearing seat 9 and the first mounting plate 91 are connected by fastening bolts. The two first bearings 7 are both fixed in the inner cavity of the first bearing seat 9. The inner cavity of the first bearing seat 9 forms the first cooling and lubrication cavity 20. One end of the liquid inlet hole is connected to the inner cavity of the first bearing seat 9, and the other end passes through the outer wall of the first bearing seat 9. A screw opening 52 is provided at the first end of the transmission screw 5. One end of the screw opening 52 is connected to the inner cavity of the first bearing seat 9, and the other end of the screw opening 52 is connected to the second cooling liquid channel 51. The cooling oil introduced through the liquid inlet hole can enter the first cooling and lubrication chamber 20 to cool and lubricate the two first bearings 7, and can also flow into the second cooling liquid channel 51 through the screw opening 52, and then flow along the second cooling liquid channel 51 to the second cooling and lubrication chamber 30.

[0051] For example, Figure 4 and Figure 5As shown, the screw-nut assembly 200 further includes a first limiting sleeve 92, which is fixedly mounted on the first end of the transmission screw 5. Two first limiting sleeves 92 are provided, and the two first limiting sleeves 92 press against the inner ring of the first bearing 7 from both sides along the axis of the transmission screw 5. One of the first limiting sleeves 92 is positioned by a shoulder on the transmission screw 5, and the other first limiting sleeve 92 is locked by a first locking ring 18. At the end near the first locking ring 18, the first bearing seat 9 is sleeved outside the first limiting sleeve 92. A first static seal ring 131 is provided between the first limiting sleeve 92 and the transmission screw 5, and a first rotating seal ring 141 is provided between the first limiting sleeve 92 and the first bearing seat 9. At the other end near the shaft shoulder, the first mounting plate 91 is sleeved onto the first limiting sleeve 92 via a first sealing sleeve 93. The first sealing sleeve 93 is fixedly mounted in the avoidance hole of the first mounting plate 91. A second static seal ring 132 is disposed between the first limiting sleeve 92 and the transmission screw 5. A second rotating seal ring 142 is disposed between the first sealing sleeve 93 and the first limiting sleeve 92. Two third static seal rings 133 are disposed between the first sealing sleeve 93 and the first mounting plate 91. The above sealing structure provides an excellent sealing effect on the first cooling and lubrication chamber 20, effectively preventing leakage of cooling oil.

[0052] For example, Figure 4 and Figure 6As shown, the screw-nut assembly 200 also includes a second bearing seat 11, which is sleeved on the transmission screw 5 and forms a second cooling and lubrication chamber 30 therebetween. The outer ring of the second bearing 8 is fixed to the second bearing seat 11. The second bearing seat 11 is provided with a liquid outlet connected to the second cooling and lubrication chamber 30, and the liquid outlet is used to discharge liquid. Specifically, two second bearings 8 are arranged side by side. The second bearing seat 11 and the second mounting plate 111 jointly lock the outer rings of the two second bearings 8. The second bearing seat 11 and the second mounting plate 111 are connected by fastening bolts. The two second bearings 8 are both fixed in the inner cavity of the second bearing seat 11. The inner cavity of the second bearing seat 11 forms the second cooling and lubrication chamber 30. One end of the oil inlet is connected to the inner cavity of the second bearing seat 11, and the other end passes through the outer wall of the second bearing seat 11. The second cooling liquid channel 51 passes through the end of the second end of the transmission screw 5. An end cap 12 is mounted on the side of the second bearing seat 11 facing away from the second mounting plate 111. End cap 12 includes a cavity structure 121 within the end cap 12, which communicates with the inner cavity of the second bearing seat 11. The through-port of the second cooling channel 51 communicates with the cavity structure 121 of the end cap 12. The cooling oil flowing out of the second cooling channel 51 first enters the cavity structure 121 of the end cap 12, then flows into the second cooling and lubrication cavity 30, cooling and lubricating the two second bearings 8 before returning to the cooling device through the outlet. The second cooling channel 51 is a single-channel structure, which is simpler and less expensive to manufacture than a screw-type reciprocating cooling channel.

[0053] For example, Figure 4 and Figure 6 As shown, the screw-nut assembly 200 further includes a second limiting sleeve 112, which is fixedly mounted on the second end of the transmission screw 5. The second limiting sleeve 112 presses against the inner ring of the second bearing 8 along the axial direction of the transmission screw 5 from the side facing away from the end cover 12. The second limiting sleeve 112 is positioned by a shaft shoulder on the transmission screw 5, and the other side of the second bearing 8 is locked by a second locking ring 19. The second mounting plate 111 is sleeved onto the outside of the second limiting sleeve 112 via a second sealing sleeve 113. The second sealing sleeve 113 is fixedly mounted in a relief hole of the second mounting plate 111. A fourth static sealing ring 151 is disposed between the second limiting sleeve 112 and the transmission screw 5, a third rotating sealing ring 16 is disposed between the second sealing sleeve 113 and the second limiting sleeve 112, and two fifth static sealing rings 152 are disposed between the second sealing sleeve 113 and the second mounting plate 111. The above sealing structure provides an excellent sealing effect for the second cooling and lubricating cavity 30 , and can effectively prevent the cooling oil from leaking.

[0054] For example, Figure 6 As shown, a sixth static sealing ring 153 is provided between the end cover 12 and the second bearing seat 11 .

[0055] Exemplarily, the first static sealing ring 131 , the second static sealing ring 132 , the third static sealing ring 133 , the fourth sealing ring 151 , the fifth static sealing ring 152 and the sixth static sealing ring 153 are all static sealing rings in the prior art, and are made of high-temperature-resistant and corrosion-resistant elastic materials such as rubber.

[0056] Illustratively, the first rotary sealing ring 141 , the second rotary sealing ring 142 and the third rotary sealing ring 16 are all rotary sealing rings in the prior art, and are made of high-temperature-resistant and corrosion-resistant elastic materials such as polytetrafluoroethylene, silicone, and rubber.

[0057] Exemplarily, the first bearing 7 and the second bearing 8 are both angular contact bearings.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A translational power device, characterized in that: include: A motor assembly (100) comprises a rotating motor (1), a motor mounting plate (2) and a cooling plate (3), wherein the rotating motor (1) is mounted on the motor mounting plate (2), the cooling plate (3) abuts against the motor mounting plate (2), and a first cooling liquid channel (10) is formed between the cooling plate (3) and the motor mounting plate (2); A screw-nut assembly (200) comprises a threaded transmission screw (5) and a transmission nut (6), wherein the transmission screw (5) is connected to a rotating shaft (101) of the rotating motor (1), and the transmission nut (6) is used to connect to a workbench. A second cooling liquid channel (51) extending in the same direction as the transmission screw (5) is provided in the transmission screw (5).

2. The translational power device according to claim 1, characterized in that: A first avoidance hole is provided on the motor mounting plate (2), the cooling plate (3) is installed in the first avoidance hole, a second avoidance hole (31) for the rotating shaft (101) to pass through is provided on the cooling plate (3), and the first cooling liquid channel (10) is formed between the hole wall of the first avoidance hole and the outer peripheral wall of the cooling plate (3).

3. The translational power device according to claim 2, characterized in that: The cooling plate (3) is provided with a cooling groove (32) extending around its outer peripheral wall, and the cooling groove (32) and the hole wall of the first avoidance hole are surrounded to form the first cooling liquid channel (10).

4. The translational power device according to claim 3, characterized in that: The cooling groove (32) is configured as a spiral groove structure arranged along a spiral curve around the outer peripheral wall of the cooling plate (3); or The cooling groove (32) comprises at least two annular grooves (321) that are interconnected, and along the axial direction of the second avoidance hole (31), at least two of the annular grooves (321) are distributed at intervals.

5. The translational power device according to claim 2, characterized in that: Along the axial direction of the second avoidance hole (31), sealing grooves (33) are respectively provided on opposite sides of the cooling groove (32), and a sealing ring (4) is embedded in the sealing groove (33). The sealing ring (4) is used to seal the gap between the hole wall of the first avoidance hole and the outer peripheral wall of the cooling plate (3).

6. The translational power device according to claim 2, characterized in that: The motor mounting plate (2) is provided with a liquid inlet channel (201) and a liquid outlet channel (202), one end of the liquid inlet channel (201) is connected to the first cooling liquid channel (10), the other end of the liquid inlet channel (201) is connected to an external cooling liquid supply pipeline, one end of the liquid outlet channel (202) is connected to the first cooling liquid channel (10), and the other end of the liquid outlet channel (202) is connected to an external cooling liquid return pipeline.

7. The translational power device according to any one of claims 1 to 6, characterized in that: The screw-nut assembly (200) further includes a first bearing (7) and a second bearing (8); a first cooling and lubricating cavity (20) is provided at the first end of the transmission screw (5); the first bearing (7) is provided in the first cooling and lubricating cavity (20) and is sleeved on the transmission screw (5); a second cooling and lubricating cavity (30) is provided at the second end of the transmission screw (5); the second bearing (8) is provided in the second cooling and lubricating cavity (30) and is sleeved on the transmission screw (5); one end of the second cooling liquid channel (51) is connected to the first cooling and lubricating cavity (20), and the other end of the second cooling liquid channel (51) is connected to the second cooling and lubricating cavity (30).

8. The translational power device according to claim 7, characterized in that: The screw nut assembly (200) further includes: A first bearing seat (9) is sleeved on the transmission screw (5) and forms the first cooling and lubricating cavity (20) therebetween. The outer ring of the first bearing (7) is fixed to the first bearing seat (9). The first bearing seat (9) is provided with a liquid inlet hole connected to the first cooling and lubricating cavity (20), and the liquid inlet hole is used for liquid inlet. The second bearing seat (11) is sleeved on the transmission screw (5) and forms the second cooling and lubricating cavity (30) therebetween. The outer ring of the second bearing (8) is fixed to the second bearing seat (11). The second bearing seat (11) is provided with a liquid outlet connected to the second cooling and lubricating cavity (30), and the liquid outlet is used for liquid discharge.

9. The translational power device according to claim 8, characterized in that: The screw-nut assembly (200) further includes an end cover (12), the end cover (12) being sealedly connected to the second bearing seat (11), the end cover (12) being provided with a cavity structure (121) communicating with the inner cavity of the second bearing seat (11), and the second cooling liquid channel (51) passing through the end of the second end of the transmission screw (5) and communicating with the cavity structure (121).

10. A CNC machine tool, characterized in that: It comprises a machine base, a workbench and a translational power device as described in any one of claims 1 to 9, wherein the translational power device is installed on the machine base, the workbench is installed on the machine base in a horizontal sliding direction, and the workbench is connected to the transmission nut (6).

Images