Lead screw structure of numerical control machine tool

Abstract

The utility model provides a lead screw structure of a numerical control machine tool, which belongs to the technical field of machining and comprises a bearing seat, a lead screw and an abrasion reducing mechanism are fixedly arranged on the side wall of the bearing seat, the abrasion reducing mechanism comprises an arc-shaped T-shaped sliding groove arranged on the side wall of the bearing seat, and an arc-shaped T-shaped sliding block is connected in the arc-shaped T-shaped sliding groove in a sliding mode. The abrasion reducing mechanism is arranged to reduce pressure borne by the nut and the lead screw, meanwhile, the nut is limited to rotate and move in the axial direction of the lead screw all the time, the phenomenon that the nut inclines when meshed is avoided, abrasion of the surfaces of the nut and the lead screw is reduced, transmission efficiency is improved, and the service life is prolonged. Wind power is generated by arranging the protection assembly, water vapor on the surface of the lead screw is dried, the surface of the lead screw can be effectively prevented from being oxidized due to the water vapor, and a certain protection effect is provided for the lead screw.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a lead screw structure of a numerically controlled machine tool. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool. It is an automated machine tool equipped with a program control system. After calculation and processing, the CNC device sends out various control signals to control the movement of the machine tool. It automatically processes parts according to the shape and size required by the drawing. CNC machine tools have better solved the problems of complex, precise, small batch and multi-variety parts processing. It is a flexible and high-efficiency automated machine tool that represents the development direction of modern machine tool control technology and is a typical mechatronics product. In CNC machine tools, the lead screw, as an indispensable structure, is a key component to realize machine tool motion control. Its performance directly affects the machining accuracy, stability and production efficiency of the machine tool.

[0003] The above prior art often has the following problems when used:

[0004] When the existing screw structure of a CNC machine tool is in use, the screw mechanism often needs to provide a certain amount of load, which makes the friction force during operation relatively large. When the nut part in the screw structure does not strictly rotate and move according to the axial direction of the screw, the wear between the nut and the screw will be serious, which will cause damage to the screw or the nut over time and cause thread slippage. At the same time, some water vapor generated in the machine tool workshop will contaminate the surface of the screw. If it is not treated, it is easy to cause oxidation on the surface of the screw, thereby affecting normal use and its transmission efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a lead screw structure for a numerically controlled machine tool.

[0006] The embodiment of the utility model provides a screw structure of a CNC machine tool, comprising:

[0007] A bearing seat, a screw rod being fixedly provided on the side wall of the bearing seat;

[0008] The wear reducing mechanism comprises an arc-shaped T-shaped slide groove provided on the side wall of the bearing seat, an arc-shaped T-shaped slider is slidably connected in the arc-shaped T-shaped slide groove, two wear reducing components are provided on the side of the arc-shaped T-shaped slider, the wear reducing component comprises a No. 1 sleeve fixedly connected to the side wall of the arc-shaped T-shaped slider, a No. 2 sleeve is slidably connected in the No. 1 sleeve, two No. 1 limiting slide grooves are provided on the side wall of the No. 1 sleeve, and a No. 1 limiting slide groove is slidably connected in the two No. 1 limiting slide grooves Slider, the side walls of the two No. 1 limit sliders are fixedly connected to the side walls of the No. 2 sleeve, the side walls of the No. 2 sleeve are provided with two No. 2 limit sliding grooves, the No. 2 limit sliders are slid in the two No. 2 limit sliding grooves, the No. 2 sleeves are slidably connected with connecting rods, the side walls of the two No. 2 limit sliders are fixedly connected to the side walls of the connecting rods, the screw rods are threadedly connected with nuts, the side walls of the nuts are fixedly connected to two bearing plates, and the connecting rod is fixedly connected to the side walls of the bearing plates at one end away from the bearing seat;

[0009] A protection component is arranged on the side of the bearing seat.

[0010] Furthermore, the protective assembly includes a gear ring fixedly connected between two No. 1 sleeves, the side wall of the bearing seat is rotatably connected to two rotating shafts through bearings, the two rotating shafts are fixedly connected to gears in the circumference, the two gears are meshed with the gear ring, and the two rotating shafts are fixedly connected to one end away from the bearing seat with a blowing fan blade.

[0011] Furthermore, the circumferential side wall of the No. 2 sleeve fits with the circumferential inner wall of the No. 1 sleeve.

[0012] Furthermore, the circumferential side wall of the connecting rod is in contact with the circumferential inner wall of the second sleeve.

[0013] Furthermore, the two wear reducing components are symmetrically arranged about the screw rod, and the two No. 1 sleeves are in a vertical positional relationship with the bearing seat.

[0014] Furthermore, the length of the two No. 1 limiting sliding grooves is smaller than the length of the No. 1 sleeve, and the length of the two No. 2 limiting sliding blocks is smaller than the length of the No. 2 sleeve.

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

[0016] The utility model provides a wear reducing mechanism to reduce the pressure on the nut and the screw rod, so that when the nut is threadedly meshed with the screw rod, it always rotates and moves along the axial direction of the screw rod, and the nut will not tilt when meshing, thereby reducing the wear on the surface of the nut and the screw rod, and improving the transmission efficiency and service life. By providing a protective component, when in use, when the nut of the screw rod structure is working, it rotates to generate power, so that the protective component generates wind force, which dries the water vapor on the surface of the screw rod, can effectively prevent the surface of the screw rod from being oxidized due to water vapor, and provide a certain protection for the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structural analysis of the screw structure of the CNC machine tool described in the embodiment of the utility model.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the lead screw structure of the CNC machine tool described in the embodiment of the utility model.

[0019] Figure 3 It is a three-dimensional structural schematic diagram from another perspective of the lead screw structure of the CNC machine tool described in the embodiment of the utility model.

[0020] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0021] In the above drawings: 1 bearing seat, 2 screw rod, 3 arc-shaped T-shaped slide groove, 4 arc-shaped T-shaped slider, 5 No. 1 sleeve, 6 No. 2 sleeve, 7 No. 1 limit slide groove, 8 No. 1 limit slider, 9 No. 2 limit slide groove, 10 No. 2 limit slider, 11 connecting rod, 12 nut, 13 bearing plate, 14 gear ring, 15 rotating shaft, 16 gear, 17 fan blade. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-Figure 4 As shown, the embodiment of the utility model proposes a screw structure of a CNC machine tool, including:

[0024] A bearing seat 1, a screw rod 2 is fixedly arranged on the side wall of the bearing seat 1, and a wear reducing mechanism is provided. The wear reducing mechanism includes an arc-shaped T-shaped slide groove 3 arranged on the side wall of the bearing seat 1, and an arc-shaped T-shaped slider 4 is slidably connected in the arc-shaped T-shaped slide groove 3. Two wear reducing components are arranged on the side of the arc-shaped T-shaped slider 4, and the wear reducing component includes a No. 1 sleeve 5 fixedly connected to the side wall of the arc-shaped T-shaped slider 4, and a No. 2 sleeve 6 is slidably connected in the No. 1 sleeve 5. Two No. 1 limiting slide grooves 7 are arranged on the side wall of the No. 1 sleeve 5, and a No. 1 limiting slider 8 is slidably connected in the two No. 1 limiting slide grooves 7. The side walls of the two No. 1 limiting sliders 8 are fixedly connected to the side walls of the No. 2 sleeve 6, and two No. 2 limiting slide grooves 9 are arranged on the side wall of the No. 2 sleeve 6. A No. 2 limiting slider 10 is slid in the two No. 2 limiting slide grooves 9, and a connecting rod 11 is slidably connected in the No. 2 sleeve 6, and the side walls of the two No. 2 limiting sliders 10 are connected to the connecting rod 1 The side wall of the screw 2 is fixedly connected, a nut 12 is threadedly connected to the screw rod 2, and the side wall of the nut 12 is fixedly connected to two bearing plates 13, and the connecting rod 11 is fixedly connected to the side wall of the bearing plate 13 at one end away from the bearing seat 1, and the circumferential side wall of the No. 2 sleeve 6 fits with the circumferential inner wall of the No. 1 sleeve 5, and the circumferential side wall of the connecting rod 11 fits with the circumferential inner wall of the No. 2 sleeve 6, so that the No. 1 sleeve 5, the No. 2 sleeve 6 and the connecting rod 11 can effectively share the pressure of the screw rod structure, and the two wear reducing components are symmetrically arranged about the screw rod 2, and the two No. 1 sleeves 5 are in a vertical position relationship with the bearing seat 1, the length of the two No. 1 limiting slide grooves 7 is less than the length of the No. 1 sleeve 5, and the length of the two No. 2 limiting slide blocks 10 is less than the length of the No. 2 sleeve 6, so that the No. 2 sleeve 6 will not be separated from the No. 1 sleeve 5, and the connecting rod 11 will not be separated from the No. 2 sleeve 6, thereby ensuring the effective operation of the wear reducing components;

[0025] A protection component is arranged on the side of the bearing seat 1. The protection component includes a gear ring 14 fixedly connected between the two No. 1 sleeves 5. The side wall of the bearing seat 1 is rotatably connected to two rotating shafts 15 through bearings. The two rotating shafts 15 are fixedly connected to the circumference with gears 16. The two gears 16 are meshed with the gear ring 14. The two rotating shafts 15 are fixedly connected to one end away from the bearing seat 1 with a blowing fan blade 17.

[0026] The detailed working process of the utility model is as follows:

[0027] When in use, when the nut 12 rotates and moves along the screw rod 2, the arc-shaped T-shaped slider 4 is driven to stably move in the movable arc-shaped T-shaped slide groove 3 through the two connecting rods 11, the second sleeve 6 and the first sleeve 5. The two first sleeves 5 are perpendicular to the bearing seat 1. Therefore, when the nut 12 rotates and moves, it will always move along the axial direction of the screw rod 2, and the nut 12 will not be cut when working, so that the friction between the nut 12 and the screw rod will not increase, and the wear between the nut 12 and the screw rod is reduced by sharing the pressure of the two and limiting the direction of movement;

[0028] When the two No. 1 sleeves 5 rotate with the nut 12, the gear ring 14 is driven to rotate, and then the two gears 16 and the rotating shaft 15 are driven to rotate through meshing transmission. The rotation of the two rotating shafts 15 will drive the two blowing fan blades 17 to rotate, thereby generating wind force to dry the water vapor or water stains attached to the surface of the screw rod 2, which can effectively prevent the surface of the screw rod from being oxidized due to water vapor or water stains, and provide a certain protection for the screw rod.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. The screw structure of the CNC machine tool is characterized by: include: A bearing seat (1), a screw rod (2) being fixedly provided on a side wall of the bearing seat (1); A wear reducing mechanism, the wear reducing mechanism comprising an arc-shaped T-shaped slide groove (3) arranged on the side wall of the bearing seat (1), an arc-shaped T-shaped slider (4) being slidably connected in the arc-shaped T-shaped slide groove (3), two wear reducing components being arranged on the side of the arc-shaped T-shaped slider (4), the wear reducing component comprising a No. 1 sleeve (5) fixedly connected to the side wall of the arc-shaped T-shaped slider (4), a No. 2 sleeve (6) being slidably connected in the No. 1 sleeve (5), two No. 1 limiting slide grooves (7) being arranged on the side wall of the No. 1 sleeve (5), a No. 1 limiting slider (8) being slidably connected in the two No. 1 limiting slide grooves (7), and the two No. 1 limiting sliders (8) being slidably connected in the two No. 1 limiting slide grooves (7). The side walls of the slider (8) are fixedly connected to the side walls of the No. 2 sleeve (6); the side walls of the No. 2 sleeve (6) are provided with two No. 2 limit sliding grooves (9); the No. 2 limit slider (10) is slid in the two No. 2 limit sliding grooves (9); the No. 2 sleeve (6) is slidably connected with a connecting rod (11); the side walls of the two No. 2 limit sliders (10) are fixedly connected to the side walls of the connecting rod (11); a nut (12) is threadedly connected to the screw rod (2); the side walls of the nut (12) are fixedly connected to two bearing plates (13); the end of the connecting rod (11) away from the bearing seat (1) is fixedly connected to the side wall of the bearing plate (13); A protection component is arranged on the side of the bearing seat (1).

2. The lead screw structure of a CNC machine tool according to claim 1, characterized in that: in: The protection component comprises a gear ring (14) fixedly connected between two No. 1 sleeves (5); the side wall of the bearing seat (1) is rotatably connected to two rotating shafts (15) via bearings; the two rotating shafts (15) are fixedly connected to gears (16) in the circumferential direction; the two gears (16) are meshed with the gear ring (14); and the ends of the two rotating shafts (15) away from the bearing seat (1) are fixedly connected to blowing fan blades (17).

3. The lead screw structure of a CNC machine tool according to claim 1, characterized in that: in: The circumferential side wall of the second sleeve (6) is in contact with the circumferential inner wall of the first sleeve (5).

4. The lead screw structure of a CNC machine tool according to claim 1, characterized in that: in: The circumferential side wall of the connecting rod (11) fits with the circumferential inner wall of the second sleeve (6).

5. The lead screw structure of a CNC machine tool according to claim 1, characterized in that: in: The two wear reducing components are symmetrically arranged about the screw rod (2), and the two No. 1 sleeves (5) are in a vertical positional relationship with the bearing seat (1).

6. The lead screw structure of a CNC machine tool according to claim 1, characterized in that: in: The length of the two No. 1 limiting slide grooves (7) is smaller than the length of the No. 1 sleeve (5), and the length of the two No. 2 limiting slide blocks (10) is smaller than the length of the No. 2 sleeve (6).

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