Heat dissipation protection mechanism for linear shaft of numerical control machine tool

Abstract

The utility model belongs to the technical field of numerical control machine tools, and relates to a numerical control machine tool linear shaft heat dissipation protection mechanism which comprises an organ protection cover and an axial flow fan. The organ protective cover is composed of an organ type sleeve and T-shaped end sleeves arranged at the two ends of the organ type sleeve, and the organ type sleeve is of a flexible telescopic structure. An air inlet joint and an air outlet joint are respectively arranged on the two T-shaped end sleeves; the air inlet connector is communicated with an air outlet of the axial flow fan through an air supply pipe. The heat dissipation protection mechanism is used for shielding and protecting a lead screw of a linear shaft of a numerical control machine tool, scrap iron, cooling liquid and tool accidental accidents are prevented from damaging the lead screw, air is conveyed to an annular space between the organ protection cover and the lead screw through the air supply pipe and the air inlet connector by means of the axial flow fan, and the air flows out of the air outlet connector and can take away heat generated by the lead screw; and heat dissipation and cooling can be conducted on the lead screw, thermal elongation errors caused by temperature rise of the lead screw due to motion friction can be reduced, and the position precision and the machining precision of a workpiece on the workbench are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to numerical control machine tool technical field relates to a numerical control machine tool linear shaft heat protection mechanism. BACKGROUND

[0002] Lead screw and bearing are the key components of the linear shaft of the numerical control machine tool, which transmits the power of the servo motor to the moving parts of the numerical control machine tool to realize accurate motion control. The prior art sets up the organ protective cover, aluminum curtain or steel plate protective cover and other protection mechanisms on the numerical control machine tool to protect the lead screw and guide rail of the linear shaft. The protection mechanism can prevent iron filings, cooling liquid and accidental tool incidents, and helps to prolong the service life of the lead screw and guide rail of the linear shaft. Although the existing protection mechanism can protect the lead screw from damage by iron filings and avoid the wear of the lead screw to affect the machining precision, the lead screw is still susceptible to the influence of motion friction heating during the operation of the numerical control machine tool, which may cause thermal elongation deformation, change the pitch and generate thermal elongation error, thereby affecting the position accuracy and machining precision of the workpiece on the workbench. The existing linear shaft protection mechanism lacks a heat dissipation design that can reduce the thermal error of the lead screw. SUMMARY

[0003] The utility model aims at providing a numerical control machine tool linear shaft heat protection mechanism to solve the problem of the lack of heat dissipation design that can reduce the thermal error of the lead screw in the existing linear shaft protection mechanism.

[0004] The utility model realizes the following technical scheme:

[0005] A numerical control machine tool linear shaft heat protection mechanism, comprising an organ protective cover, the organ protective cover is composed of an organ type sleeve and T-shaped end sleeves arranged at both ends of the organ type sleeve, and the organ type sleeve is a flexible telescopic structure; the organ protective cover is used for covering the lead screw of the linear shaft of the numerical control machine tool to protect the lead screw, and two T-shaped end sleeves can be screwed on the ball nut and bearing seat of the linear shaft respectively; air inlet joints and air outlet joints are arranged on the two T-shaped end sleeves respectively, the air inlet joints and air outlet joints are communicated with the inside of the T-shaped end sleeves, air enters the T-shaped end sleeves through the air inlet joints, and then flows out of the air outlet joints through the organ type sleeve to take away the heat generated by the lead screw in the organ type sleeve and cool the lead screw.

[0006] It also comprises an axial flow fan, the air inlet joint is communicated with the air outlet of the axial flow fan through a air supply pipe, and the axial flow fan is used for conveying air to the organ protective cover to dissipate heat, improve the air flow rate in the organ protective cover and improve the heat dissipation effect of the lead screw.

[0007] Further, the air inlet joint is arranged on the T-shaped end sleeve screwed with the ball nut of the linear shaft, and air is sent into the organ protective cover to ventilate and cool the lead screw, so that air is inhaled from the end close to the ball nut, and the heat generated by the friction between the lead screw and the ball nut is inhaled from the end close to the ball nut, so that the heat dissipation effect of the lead screw is improved.

[0008] Further, a plurality of air inlet joints are arranged on one of the T-shaped end sleeves in a ring shape and uniformly distributed around the axis, air is simultaneously sent into the organ protective cover through the plurality of air inlet joints, air circulation on the outer side of the lead screw is more balanced, and the heat dissipation effect is improved.

[0009] Further, a plurality of air outlet joints are arranged on the other T-shaped end sleeve in a ring shape and uniformly distributed around the axis, air is simultaneously sent into the organ protective cover through the plurality of air inlet joints, and air is simultaneously discharged through the plurality of air outlet joints, so that air in the annular space between the organ protective cover and the lead screw flows in the axial direction more uniformly, and the heat dissipation effect is improved.

[0010] Further, an air outlet pipe is connected to each air outlet joint, so that the air outlet channel is lengthened, and the probability that the chips generated during the operation of the numerical control machine tool damage the lead screw when entering the organ protective cover through the air outlet joint is reduced.

[0011] Further, the axial flow fan is installed on the workbench of the linear shaft of the numerical control machine tool and can move synchronously with the ball nut, so that the air supply pipe can be arranged, the length of the air supply pipe can be shortened, and problems such as winding, disturbance and falling of the air supply pipe during the operation of the numerical control machine tool can be avoided.

[0012] Further, the heat dissipation protection mechanism further comprises a machine base for installing the axial flow fan, the machine base is formed with an air supply bin, the axial flow fan is installed on the machine base, and the air outlet of the axial flow fan is in communication with the air supply bin, the side wall of the air supply bin is provided with a plurality of shunt joints for connecting the air supply pipes, and each shunt joint is in communication with the inside of the air supply bin; the axial flow fan sends air into the air supply bin when operating, and the air in the air supply bin is shunted to each air supply pipe through each shunt joint.

[0013] Further, the organ sleeve is composed of a spiral steel wire framework and nylon cloth or glass fiber cloth wrapped outside, and has the characteristics of oil resistance, corrosion resistance, impact resistance, long service life, good sealing, stable walking, firmness and durability.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The heat dissipation protection mechanism is used for shielding the lead screw of the linear shaft of the numerical control machine tool, two heat dissipation protection mechanisms are needed to be installed on the same lead screw, annular spaces are formed between the two organ type protection covers and the lead screw, one organ type protection cover is stretched and the other organ type protection cover is contracted when the ball nut moves on the lead screw, so as to shield the lead screw, prevent iron filings, prevent cooling liquid, prevent tools from accidentally damaging the lead screw, which is the same as the protection of the lead screw in the prior art, based on the temperature rise of the lead screw and the ball nut due to the movement friction during the operation of the numerical control machine tool, the axial flow fan transports air to the annular space between the organ type protection cover and the lead screw through the air supply pipe and the air inlet joint, the air flows out from the air outlet joint, the axial flow fan can increase the air flow rate in the annular space, the air carries away the heat generated by the lead screw during the flow in the annular space between the organ type protection cover and the lead screw, and the lead screw can be cooled, so as to reduce the thermal elongation error of the lead screw due to the temperature rise caused by the movement friction, and ensure the position accuracy and machining accuracy of the workpiece on the workbench. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, various elements or parts are not necessarily drawn according to the actual proportion.

[0017] Figure 1 It is a sectional view of the structure of the present application.

[0018] Figure 2 It is a sectional view of the structure of the present application.

[0019] Figure 3 It is Figure 2 It is an enlarged schematic view of the local structure at A in the middle.

[0020] Names of various parts in the drawings: 1, organ type protection cover; 1.1, organ type sleeve; 1.2, T type end sleeve; 2, air outlet joint; 3, air outlet pipe; 4, air inlet joint; 5, machine base; 5.1, air supply chamber; 6, axial flow fan; 7, flow dividing joint; 8, air supply pipe; 9, lead screw; 10, ball nut; 11, sliding block; 12, workbench; 13, bearing seat; 14, bearing; 15, servo motor; 16, shaft coupling. DETAILED DESCRIPTION

[0021] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0022] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] A linear shaft heat dissipation protection mechanism of a numerical control machine tool, as shown in the drawings, mainly comprises an organ protection cover 1, an axial flow fan 6 and a machine base 5 for mounting the axial flow fan 6. Figure 1

[0024] As shown in the drawings, the organ protection cover 1 is composed of an organ sleeve 1.1 and T-shaped end sleeves 1.2 arranged at both ends of the organ sleeve 1.1. Figure 1

[0025] The organ sleeve 1.1 is a flexible and retractable structure, which is made of a spiral steel wire framework and nylon cloth or glass fiber cloth wrapped outside, has the characteristics of oil resistance, corrosion resistance, impact resistance, long service life, good sealing, stable walking, firmness and durability, etc. The structure of the organ sleeve 1.1 is a known structure of the existing organ protection cover 1, which will not be described here.

[0026] Two T-shaped end sleeves 1.2 are respectively provided with an air inlet joint 4 and an air outlet joint 2, which are in communication with the inside of the T-shaped end sleeve 1.2. Air can enter the T-shaped end sleeve 1.2 through the air inlet joint 4, and then flow out from the air outlet joint 2 through the organ sleeve 1.1 to take away the heat generated by the lead screw 9 in the organ sleeve 1.1, thereby cooling the lead screw 9.

[0027] As shown in the drawings, the machine base 5 is installed on the workbench 12 of the linear shaft of the numerical control machine tool and can move synchronously with the ball nut 10, which can facilitate the arrangement of the air supply pipe 8, shorten the length of the air supply pipe 8, and avoid problems such as winding, disturbance and falling of the air supply pipe 8 during operation of the numerical control machine tool. Figure 2 Figure 3 As shown in the drawings, the machine base 5 is installed on the workbench 12 of the linear shaft of the numerical control machine tool and can move synchronously with the ball nut 10, which can facilitate the arrangement of the air supply pipe 8, shorten the length of the air supply pipe 8, and avoid problems such as winding, disturbance and falling of the air supply pipe 8 during operation of the numerical control machine tool.

[0028] As shown in the drawings, the machine base 5 is installed on the workbench 12 of the linear shaft of the numerical control machine tool and can move synchronously with the ball nut 10, which can facilitate the arrangement of the air supply pipe 8, shorten the length of the air supply pipe 8, and avoid problems such as winding, disturbance and falling of the air supply pipe 8 during operation of the numerical control machine tool. Figure 1

[0029] Preferably, in the present embodiment, as shown in the drawings, the machine base 5 is installed on the workbench 12 of the linear shaft of the numerical control machine tool and can move synchronously with the ball nut 10, which can facilitate the arrangement of the air supply pipe 8, shorten the length of the air supply pipe 8, and avoid problems such as winding, disturbance and falling of the air supply pipe 8 during operation of the numerical control machine tool. Figures 1 to 3 ​​​​As shown, the air inlet joint 4 is arranged on the T-shaped end sleeve 1.2 screwed with the straight shaft ball nut 10, and air is sent into the organ protective cover 1 to ventilate and cool the lead screw 9. When the air is inhaled from the end close to the ball nut 10, the heat generated by the movement friction between the lead screw 9 and the ball nut 10 can improve the heat dissipation effect of the lead screw 9.

[0030] One of the T-shaped end sleeves 1.2 is provided with a plurality of air inlet joints 4 uniformly distributed in a ring shape with the axis as the center. The air is sent into the organ protective cover 1 through the plurality of air inlet joints 4, which can improve the air circulation on the outside of the lead screw 9 and improve the heat dissipation effect.

[0031] Another T-shaped end sleeve 1.2 is provided with a plurality of air outlet joints 2 uniformly distributed in a ring shape with the axis as the center. The air is sent into the organ protective cover 1 through the plurality of air inlet joints 4, and the air is discharged through the plurality of air outlet joints 2, which can improve the axial circulation of the air between the organ protective cover 1 and the lead screw 9 and improve the heat dissipation effect.

[0032] Preferably, in the embodiment, as shown in Figure 1 Each of the air outlet joints 2 is connected to an air outlet pipe 3, and the length of the air outlet pipe 3 is 2-5 cm, which can prolong the air outlet channel and reduce the probability of damage to the lead screw 9 by the chips generated during the operation of the numerical control machine tool entering the organ protective cover 1 through the air outlet joint 2.

[0033] The working principle of the heat dissipation protection mechanism is as follows:

[0034] The lead screw 9 and the bearing 14 are key components of the linear shaft of the numerical control machine tool. In addition, as shown in Figure 2 The linear shaft of the numerical control machine tool also includes a bearing seat 13 for mounting the bearing 14 to support the lead screw 9, a servo motor 15 for driving the lead screw 9 to rotate, a shaft coupling 16 for connecting the lead screw 9 and the power output end of the servo motor 15, a sliding block 11 matched with the ball nut 10, a workbench 12 mounted on the sliding block 11, a linear guide rail, and other components. The above-mentioned components are well-known technologies for the linear shaft of the numerical control machine tool, and will not be described here.

[0035] When the screw 9 of the linear axis of the numerical control machine tool is shielded and cooled, the heat dissipation protection mechanism is provided with two, the two heat dissipation protection mechanisms are sleeved on the screw 9, and are located on the two sides of the ball nut 10, respectively. When the ball nut 10 moves on the screw 9, one of the two heat dissipation protection mechanisms is extended, and the other is retracted, so as to shield and protect the screw 9. However, the two heat dissipation protection mechanisms share one axial flow fan 6. The axial flow fan 6 is a micro axial flow fan 6, such as AGE02006-12H type axial flow fan 6. Other types of axial flow fans 6 can also be selected. The size and flow of the axial flow fan 6 are selected according to the size of the screw 9 of the numerical control machine tool and the size of the workbench 12.

[0036] The specific installation structure of the heat dissipation protection mechanism is shown in the accompanying drawings. Figure 2 One end of the T-shaped end sleeve 1.2 of one of the two heat dissipation protection mechanisms is screwed on the bearing seat 13 near the servo motor 15, and the other end of the T-shaped end sleeve 1.2 is screwed on the left end of the ball nut 10 and the left end of the sliding block 11. The T-shaped end sleeve 1.2 of the other heat dissipation protection mechanism is screwed on the right end of the sliding block 11, and the T-shaped end sleeve 1.2 of the other heat dissipation protection mechanism is screwed on the bearing seat 13 away from the servo motor 15. The two heat dissipation protection mechanisms form an annular space between the two heat dissipation protection mechanisms and the screw 9. The two heat dissipation protection mechanisms shield and protect the screw 9 from iron filings, cooling liquid and tools. The axial flow fan 6 is installed on the workbench 12 through the machine base 5. The multiple air inlet joints 4 on the T-shaped end sleeve 1.2 of the two heat dissipation protection mechanisms are connected to the multiple shunt joints 7 on the side wall of the air supply bin 5.1 through the air supply pipe 8. Based on the temperature rise between the screw 9 and the ball nut 10 due to movement and friction during the operation of the numerical control machine tool, the axial flow fan 6 sends air to each air supply pipe 8, so that the air enters the annular space between the heat dissipation protection mechanism and the screw 9 through the air inlet joint 4 of the heat dissipation protection mechanism, and then flows out from the air outlet joint 2. The axial flow fan 6 can increase the air flow rate in the annular space, improve the air inlet from the end close to the ball nut 10 (i.e. the source of heat generation between the screw 9 and the ball nut 10), and improve the heat dissipation effect of the screw 9, thereby reducing the thermal elongation error of the screw 9 due to movement and friction, and ensuring the position accuracy and machining accuracy of the workpiece on the workbench.

[0037] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A linear shaft cooling protection mechanism for a numerical control machine tool, comprising an accordion protection cover (1), characterized in that: The organ protective cover (1) is composed of an organ sleeve (1.1) and T-shaped end sleeves (1.2) arranged at both ends of the organ sleeve (1.1), and the organ sleeve (1.1) is flexible and telescopic; the organ protective cover (1) is used for covering the lead screw (9) of the linear shaft of the numerical control machine tool to shield and protect the lead screw (9); the two T-shaped end sleeves (1.2) are respectively provided with an air inlet joint (4) and an air outlet joint (2). The air inlet joint (4) and the air outlet joint (2) are respectively provided on the T-shaped end sleeves (1.2).

2. The linear shaft cooling protection mechanism of the CNC machine tool according to claim 1, characterized in that: The air inlet joint (4) is arranged on the T-shaped end sleeve (1.2) screwed with the linear shaft ball nut (10).

3. The linear shaft cooling protection mechanism of the CNC machine tool according to claim 2, characterized in that: One of the T-shaped end sleeves (1.2) is provided with a plurality of air inlet joints (4) uniformly distributed in a ring shape with the axis as the center.

4. The linear shaft cooling protection mechanism of the CNC machine tool according to claim 3, characterized in that: The other T-shaped end sleeve (1.2) is provided with a plurality of air outlet joints (2) uniformly distributed in a ring shape with the axis as the center.

5. The linear shaft cooling protection mechanism of the CNC machine tool according to claim 4, characterized in that: Each air outlet joint (2) is connected with a section of air outlet pipe (3).

6. The linear shaft cooling protection mechanism of the numerically controlled machine tool according to any one of claims 2 to 4, characterized in that: The axial flow fan (6) is installed on the workbench (12) of the linear shaft of the numerical control machine tool and can move synchronously with the ball nut (10).

7. The linear shaft cooling protection mechanism of the CNC machine tool according to claim 6, characterized in that: The heat dissipation protection mechanism further comprises a machine base (5) for installing the axial flow fan (6), the machine base (5) is formed with an air supply bin (5.1), the axial flow fan (6) is installed on the machine base (5), the air outlet of the axial flow fan (6) communicates with the air supply bin (5.1), and the side wall of the air supply bin (5.1) is provided with a plurality of shunt joints (7) for connecting the air supply pipe (8), each shunt joint (7) communicates with the inside of the air supply bin (5.1).

8. The linear shaft cooling protection mechanism of the CNC machine tool according to claim 1, characterized in that: The organ sleeve (1.1) is composed of a spiral steel wire framework and nylon cloth or glass fiber cloth wrapped outside.

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