Lead screw nut structure of high-speed machine tool and high-speed machine tool

Abstract

The utility model discloses a lead screw nut structure of a high-speed machine tool and the high-speed machine tool, the lead screw nut structure comprises a lead screw nut arranged on a lead screw in a sleeving mode, the lead screw nut is connected with a transmission mechanism of the machine tool, and the transmission mechanism drives the lead screw nut to rotate; wherein the transmission mechanism comprises a driving motor; the bearing sleeve is arranged on the lead screw nut in a sleeving mode, and the bearing sleeve is fixedly connected with the machine tool; wherein the bearing sleeve is provided with a cooling channel, and the cooling channel comprises an oil inlet and an oil outlet; and the connecting assembly is arranged between the lead screw nut and the bearing sleeve. Through the lead screw nut structure, the operation efficiency and stability of a machine tool can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of machine tools, and in particular to a lead screw nut structure of a high-speed machine tool and a high-speed machine tool. Background Art

[0002] A machine tool is a highly automated mechanical processing equipment that processes workpieces through installed tools and pre-programmed processing programs. When the existing machine tool mechanism is processing, the drive device drives the screw to rotate, thereby realizing the movement of the worktable in the machine tool. Since the maximum speed of the screw is slow when rotating, and the radial runout generated by the screw is large when rotating, the operating speed and stability of the machine tool are limited to a certain extent.

[0003] In view of this, how to improve the operating speed and operating stability of machine tools has become a problem that needs to be urgently solved in this field. Utility Model Content

[0004] The main technical problem solved by the present application is to provide a screw nut structure of a high-speed machine tool and a high-speed machine tool, which can improve the operating efficiency and stability of the machine tool.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a screw nut structure of a high-speed machine tool, including: a screw nut, which is sleeved on the screw, and the screw nut is connected to the transmission mechanism of the machine tool, and the transmission mechanism drives the screw nut to rotate; wherein the transmission mechanism includes a driving motor; a bearing sleeve, which is sleeved on the screw nut, and the bearing sleeve is fixedly connected to the machine tool; wherein the bearing sleeve is provided with a cooling channel, and the cooling channel includes an oil inlet and an oil outlet; a connecting assembly, which is arranged between the screw nut and the bearing sleeve.

[0006] Wherein, the connecting component comprises: at least one contact bearing group, and the contact bearing group is sleeved on the screw nut; wherein each of the contact bearing groups comprises at least one angular contact ball bearing.

[0007] Wherein, when the connecting assembly includes a plurality of the contact bearing groups, the lead screw nut structure further includes: a spacer assembly, located between adjacent contact bearing groups, and the spacer assembly is sleeved on the lead screw nut.

[0008] Wherein, the spacer sleeve assembly includes a first spacer sleeve and a second spacer sleeve, the first spacer sleeve is sleeved on the lead screw nut, and the second spacer sleeve is sleeved on the first spacer sleeve.

[0009] Wherein, the screw nut structure of the high-speed machine tool further includes: a connecting sleeve, which is sleeved on the screw nut, and at least a part of the connecting sleeve is located between the screw nut and the connecting assembly.

[0010] Wherein, the screw nut structure of the high-speed machine tool also includes: a locking nut, which is located on one side of the connecting assembly; wherein, the locking nut is sleeved on the connecting sleeve, and the locking nut is used to fix the connecting assembly.

[0011] Wherein, the connecting assembly further comprises: a compression spring, which is located between the locking nut and the connecting assembly.

[0012] Wherein, the connecting assembly also includes: a third spacer sleeve, which is sleeved on the lead screw nut and located between the lead screw and the compression spring.

[0013] Wherein, the bearing sleeve comprises at least one cooling channel extending along a first direction; wherein, the first direction is consistent with an extending direction of the lead screw.

[0014] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a machine tool, which includes the screw nut structure of the high-speed machine tool mentioned in any of the above technical solutions.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the screw nut structure of the high-speed machine tool proposed in the present application includes a screw nut, a bearing sleeve and a connecting assembly. Since the screw nut has a higher maximum speed limit, the screw nut structure drives the screw nut to rotate by the transmission mechanism of the machine tool, thereby driving the corresponding parts of the machine tool to move, thereby improving the operating speed of the machine tool. Moreover, compared with the direct rotation of the screw by the transmission mechanism, the radial runout generated by the rotation of the screw nut by the transmission mechanism is smaller, thereby improving the stability of the machine tool operation and improving the machining accuracy of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 It is a structural schematic diagram of an implementation scheme of a lead screw nut structure for a high-speed machine tool of the present application. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments, and different embodiments can be adaptively combined. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0020] The terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0021] See also Figure 1 , Figure 1 It is a structural schematic diagram of an embodiment of a screw nut structure of a high-speed machine tool of the present application, and the screw nut structure includes a screw nut 10, a bearing sleeve 20 and a connecting assembly.

[0022] Specifically, the lead screw nut 10 is sleeved on the lead screw 40, and the lead screw nut 10 is connected to a transmission mechanism (not shown) of the machine tool, and the transmission mechanism drives the lead screw nut to rotate. The transmission structure includes a drive motor.

[0023] Specifically, the lead screw nut 10 is sleeved on the lead screw 40. During the actual operation of the machine tool, the lead screw 40 is fixed, and the drive motor of the machine tool transmission mechanism drives the lead screw nut 10 to rotate, so as to achieve the relative displacement between the lead screw nut 10 and the lead screw 40. In addition, the transmission mechanism also includes a transmission gear or a transmission belt, which connects the drive motor and the lead screw nut, so that the drive motor drives the lead screw nut to rotate.

[0024] In a specific application scenario, the lead screw 40 is provided with a first thread, the lead screw nut 10 is provided with a housing cavity for the lead screw 40, and the inner wall of the housing cavity is provided with a second thread matching the first thread, and the lead screw 40 is arranged in the housing cavity of the lead screw nut 10 through the first thread and the second thread matching each other, and the lead screw 40 is threadedly connected with the lead screw nut 10. Moreover, when the driving motor drives the lead screw nut 10 to rotate, the lead screw nut 10 and the lead screw 40 move relative to each other through the first thread and the second thread.

[0025] In another specific application scenario, the transmission mechanism of the machine tool includes a drive motor and a transmission gear. A gear ring is provided at the connection between the lead screw nut 10 and the transmission mechanism, and the gear ring matches the transmission gear so that the transmission gear meshes with the lead screw nut 10, and the drive motor drives the lead screw nut 10 to rotate when working.

[0026] The bearing sleeve 20 is sleeved on the lead screw nut 10, and the bearing sleeve 20 is fixedly connected to the machine tool. A cooling channel 21 is provided on the bearing sleeve 20, and the cooling channel 21 includes an oil inlet and an oil outlet. Cooling oil is injected into the cooling channel 21 through the oil inlet, so that the machine tool can cool the relevant components in the lead screw nut structure during operation, thereby improving the accuracy of the machine tool.

[0027] Specifically, the bearing sleeve 20 is sleeved on the screw nut 10 to cover part of the screw nut 10, thereby playing a certain protective role on the screw nut 10, and the screw nut 10 drives the movement of the corresponding parts on the machine tool through the bearing sleeve 20. That is, the bearing sleeve 20 is fixedly connected to the body of the machine tool. When the transmission mechanism drives the screw nut 10 to rotate, the screw nut 10 is displaced relative to the screw 40, and the bearing sleeve 20 moves with the screw nut 10, and drives the workbench in the machine tool body to move, so as to realize the processing of the corresponding workpiece. It should be noted that part of the screw nut 10 is not covered by the bearing sleeve 20, and this part is used to connect with the transmission mechanism of the above-mentioned machine tool.

[0028] The connection assembly is disposed between the lead screw nut 10 and the bearing sleeve 20 to prevent the bearing sleeve 20 from affecting the rotation of the lead screw nut 10 and to improve the stability of the connection between the lead screw nut 10 and the bearing sleeve 20. The specific components included in the connection assembly are described in detail in the subsequent corresponding embodiments.

[0029] The screw nut structure of the high-speed machine tool proposed in the present application includes a screw nut 10, a bearing sleeve 20 and a connecting assembly. Since the screw nut 10 has a higher maximum speed limit, the screw nut structure drives the screw nut 10 to rotate by the transmission mechanism of the machine tool, thereby driving the corresponding parts of the machine tool to move, thereby improving the operating speed of the machine tool. In addition, compared with directly driving the screw 40 to rotate by the transmission mechanism, the radial runout generated by driving the screw nut 10 to rotate by the transmission mechanism is smaller, thereby improving the stability of the machine tool operation and improving the machining accuracy of the machine tool.

[0030] In one embodiment, the connection assembly in the screw nut structure includes at least one contact bearing group 30, and the contact bearing group 30 is sleeved on the screw nut 10. Each contact bearing group 30 includes at least one angular contact ball bearing 31.

[0031] In one implementation scenario, if Figure 1 As shown, in order to further improve the stability of the bearing sleeve 20 relative to the screw nut 10, the screw nut structure proposed in the present application includes two contact bearing groups 30, and each contact bearing group 30 includes two angular contact ball bearings 31. The two angular contact ball bearings 31 in the same contact bearing group 30 are arranged side by side and contact each other. In addition, the angular contact ball bearing 31 can be a single-row angular contact ball bearing or a double-row angular contact ball bearing, etc., and the specific model can be set according to actual needs.

[0032] Of course, in other embodiments, the number of the contact bearing group 30 and the number of the angular contact ball bearings 31 in each contact bearing group 30 may also be set according to actual conditions.

[0033] In another embodiment, please continue to refer to Figure 1 When the connection assembly includes a plurality of contact bearing groups 30 , the screw nut structure proposed in the present application further includes a spacer assembly 50 , which is used to fix and block adjacent contact bearing groups 30 .

[0034] Specifically, the spacer assembly 50 is located between adjacent contact bearing groups 30 , and the spacer assembly 50 is sleeved on the lead screw nut 10 .

[0035] In an implementation scenario, please continue to refer to Figure 1 The above-mentioned spacer assembly 50 includes a first spacer 51 and a second spacer 52 . The first spacer 51 is sleeved on the screw nut 10 , and the second spacer 52 is sleeved on the first spacer 51 .

[0036] Optionally, in other embodiments, the first spacer 51 and the second spacer 52 may also be integrally formed. Specifically, when the first spacer 51 and the second spacer 52 are integrally formed, a cavity is provided between the first spacer 51 and the second spacer 52, which provides support for adjacent contact bearing groups 30 while reducing material costs.

[0037] In another embodiment, please continue to refer to Figure 1 The screw nut structure proposed in the present application further includes a connecting sleeve 60. The connecting sleeve 60 is sleeved on the screw nut 10, and at least part of the connecting sleeve 60 is located between the screw nut 10 and the connecting assembly, that is, the projection of the connecting assembly in the vertical direction is located on the screw nut 10. The connecting sleeve 60 is provided to play a certain transition role between the screw nut 10 and the connecting assembly, thereby helping to improve the service life of the screw nut 10 and the connecting assembly.

[0038] In another embodiment, please continue to refer to Figure 1 The screw nut structure proposed in the present application further includes a locking nut 70. The locking nut 70 is located at one side of the connecting assembly. The locking nut 70 is sleeved on the connecting sleeve 60, and the locking nut 70 is used to fix the connecting assembly.

[0039] In one implementation scenario, a locking nut 70 is provided on the side of the connection assembly that is not limited, so that the various components of the connection assembly are fixed and limited in the horizontal direction, thereby improving the stability of the connection assembly during operation of the machine tool.

[0040] In another embodiment, please continue to refer to Figure 1 In the screw nut structure proposed in the present application, the locking nut 70 further includes a compression spring 71. The compression spring 71 is located between the locking nut 70 and the connecting assembly, that is, Figure 1 As shown, the compression spring 71 is located between the locking nut 70 and the angular contact ball bearing 31 close to the locking nut 70. By arranging the compression spring 71 so that the locking nut 70 and the angular contact ball bearing 31 are fully in contact, the stability of the connection is improved.

[0041] In another embodiment, please continue to refer to Figure 1 In the screw nut structure proposed in the present application, the connection assembly further includes a third spacer 80. The third spacer 80 is sleeved on the screw nut 10 and is located between the screw nut 10 and the compression spring 71.

[0042] In one implementation scenario, if Figure 1As shown, a connecting sleeve 60 is further provided between the third spacer sleeve 80 and the lead screw nut 10 , and the third spacer sleeve 80 provides support for the connection between the connecting sleeve 60 and the compression spring 71 , so that the position of the compression spring 71 is stabilized.

[0043] In another embodiment, please continue to refer to Figure 1 In the screw nut structure proposed in the present application, the bearing sleeve 20 includes at least one cooling channel 21 extending along a first direction X. The first direction X is consistent with the extension direction of the screw 40.

[0044] In one implementation scenario, in order to facilitate the input and output of cooling oil in the cooling channel 21, the bearing sleeve 20 is provided with a protrusion 22, and the protrusion 22 is provided with an oil inlet and an oil outlet connected to the cooling channel 21. In addition, the cooling channel 21 is arranged horizontally, and when there are multiple cooling channels 21, the multiple cooling channels 21 are interconnected, so that the input or output of cooling oil can be achieved through the same oil inlet and oil outlet. By providing a cooling channel to cool the bearing sleeve 20 and other components in the screw nut structure of the present application during actual operation, the service life of the screw nut structure proposed in the present application is increased.

[0045] Optionally, in other embodiments, the cooling channel 21 may also be arranged in a spiral shape, that is, the cooling channel 21 is arranged in a spiral shape with the axis Y of the screw 40 as the center, thereby increasing the contact area between the cooling oil and the inner wall of the cooling channel 21, further improving the cooling effect, and helping to improve the machining accuracy of the machine tool.

[0046] In another embodiment, please continue to refer to Figure 1 In the screw nut structure proposed in the present application, the screw nut 10 also includes a left nut and a right nut sequentially arranged in the horizontal direction, and an adjustment gasket 90 is arranged between the left nut and the right nut. The adjustment gasket 90 is used to adjust the axial clearance between the left nut and the right nut to improve the service life of the screw nut 10 and the screw 40.

[0047] The present application also proposes a high-speed machine tool, which includes the screw nut structure mentioned in any of the above embodiments. Through the screw nut structure mentioned in any of the above embodiments, the high-speed machine tool has higher operating efficiency and stability.

[0048] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A screw nut structure for a high-speed machine tool, characterized in that: include: A lead screw nut is sleeved on the lead screw, the lead screw nut is connected to a transmission mechanism of the machine tool, and the transmission mechanism drives the lead screw nut to rotate; wherein the transmission mechanism includes a drive motor; A bearing sleeve, sleeved on the lead screw nut, the bearing sleeve is fixedly connected to the machine tool; wherein the bearing sleeve is provided with a cooling channel, the cooling channel comprising an oil inlet and an oil outlet; A connecting assembly is arranged between the lead screw nut and the bearing sleeve.

2. The lead screw nut structure of a high-speed machine tool according to claim 1, characterized in that: The connection component comprises: At least one contact bearing group, wherein the contact bearing group is sleeved on the screw nut; wherein each of the contact bearing groups includes at least one angular contact ball bearing.

3. The lead screw nut structure of a high-speed machine tool according to claim 2, characterized in that: When the connecting assembly includes a plurality of the contact bearing groups, the lead screw nut structure further includes: A spacer sleeve assembly is located between adjacent contact bearing groups, and the spacer sleeve assembly is sleeved on the lead screw nut.

4. The lead screw nut structure of a high-speed machine tool according to claim 3, characterized in that: The spacer assembly comprises a first spacer and a second spacer, wherein the first spacer is sleeved on the lead screw nut, and the second spacer is sleeved on the first spacer.

5. The lead screw nut structure for a high-speed machine tool according to claim 1, characterized in that: Also includes: A connecting sleeve is sleeved on the lead screw nut, and at least a portion of the connecting sleeve is located between the lead screw nut and the connecting assembly.

6. The lead screw nut structure for a high-speed machine tool according to claim 5, characterized in that: Also includes: A locking nut is located on one side of the connecting assembly; wherein the locking nut is sleeved on the connecting sleeve, and the locking nut is used to fix the connecting assembly.

7. The lead screw nut structure for a high-speed machine tool according to claim 6, characterized in that: The connection component also includes: A compression spring is located between the locking nut and the connecting assembly.

8. The lead screw nut structure for a high-speed machine tool according to claim 7, characterized in that: The connection component also includes: The third spacer is sleeved on the lead screw nut and is located between the lead screw nut and the compression spring.

9. The lead screw nut structure for a high-speed machine tool according to claim 1, characterized in that: The bearing sleeve includes at least one cooling channel extending along a first direction; wherein the first direction is consistent with an extending direction of the lead screw.

10. A high-speed machine tool, characterized in that: The machine tool comprises the screw nut structure of the high-speed machine tool according to any one of claims 1-9.

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