Guide sliding mechanism for numerical control machine tool

Abstract

The utility model discloses a sliding guide mechanism for a numerical control machine tool, which relates to the technical field of numerical control machine tools and comprises a sliding rail and a sliding block mounted on the sliding rail. A soft belt layer is arranged between the sliding rail and the sliding block, the outer side face of the soft belt layer is fixedly connected with the sliding block, and the inner side face of the soft belt layer is connected with the sliding rail in a sliding mode. The heat dissipation device further comprises a semiconductor cooling fin, the semiconductor cooling fin comprises a heat absorption part and a heat dissipation part, the heat absorption part is inserted into the sliding block, and the heat dissipation part is arranged on the outer side wall of the sliding block in an attached mode. The semiconductor cooling fins are used for cooling the soft belt layer and the sliding block near the soft belt layer, so that the problems of softening, expansion and deformation of the soft belt layer due to heating are avoided, the sliding smoothness and the matching precision between the sliding rail and the sliding block are guaranteed, and the machining precision of a numerical control machine tool is further improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and specifically to a guide sliding mechanism for CNC machine tools. Background Technology

[0002] Guideways are one of the most important components of CNC machine tools, largely determining their rigidity, accuracy, and accuracy retention. Currently, the main types of guideways used in CNC machine tools include sliding guideways (hardened guideways), linear rolling guideways (linear guideways), and hydrostatic guideways.

[0003] Sliding guides are the most widely used type. Plastic-coated guides are an improved version of sliding guides. By incorporating a soft strip on the slider, the friction mechanism of traditional guides is changed to a cast iron-plastic friction pair, thus reducing friction. The disadvantages of plastic-coated guides are poor heat resistance, a high coefficient of thermal expansion, and susceptibility to deformation under external forces, making heat dissipation a new technical challenge. Summary of the Invention

[0004] In order to meet the need for "plastic-coated guide rail heat dissipation technology" mentioned in the background art, this utility model provides a guide sliding mechanism for CNC machine tools.

[0005] The technical solution adopted by this utility model to meet the above-mentioned technical requirements is:

[0006] A guide slide mechanism for a CNC machine tool includes a slide rail and a slider mounted on the slide rail; a soft strip layer is provided between the slide rail and the slider, the outer side of the soft strip layer is fixedly connected to the slider, and the inner side is slidably connected to the slide rail; it also includes a semiconductor heat sink, the semiconductor heat sink including a heat absorption part and a heat dissipation part, the heat absorption part being inserted into the inside of the slider, and the heat dissipation part being fitted against the outer side wall of the slider; the slider includes a fastening plate and a limiting plate, the fastening plate including a main body and a side fastener for clamping the upper part of the heat absorption part, and the limiting plate including a first base plate and a second base plate for clamping the lower part of the heat absorption part.

[0007] As a further optimization of this utility model, the slide rail includes a main beam and a track, and two tracks are provided and arranged on both sides of the top surface of the main beam. The vertical cross-section of the slide rail is Y-shaped.

[0008] As a further optimization of this utility model, the vertical cross-section of the fastening plate is n-shaped, the limiting plate is disposed at the bottom end of the fastening plate, the limiting plate is horizontally positioned with one end located below the fastening plate and the other end located below the track.

[0009] As a further optimization of this utility model, the cross-section of the heat-absorbing part is S-shaped.

[0010] As a further optimization of this utility model, the main body includes a top plate and a side plate. The top of the side plate is fixedly installed at the bottom of the side wall of the top plate. The top plate has a straight plate structure, and the side plate has a bent plate structure. The vertical cross-section of the side plate is shaped like the number 7.

[0011] As a further optimization of this utility model, the vertical cross-section of the side fastener is shaped like the number 7, and the side fastener is fastened to the outside of the side plate; the upper part of the heat-absorbing part is inserted into the first gap between the side fastener and the side plate.

[0012] As a further optimization of this utility model, the vertical cross-section of the first base plate is shaped like the number 7, and the vertical cross-section of the second base plate is shaped like the number L. The first base plate and the second base plate are adapted to each other and fastened together. The lower part of the heat-absorbing part is inserted into the second gap between the first base plate and the second base plate.

[0013] As a further optimization of this utility model, a heat dissipation fan is provided on the outer wall of the slider, and the heat dissipation part is inserted between the heat dissipation fan and the side fastener.

[0014] As a further optimization of this utility model, the side fastener has a shell-like structure; the side fastener has a first through hole at the side wall position near the heat-absorbing part, a second through hole at the top wall position, and a third through hole at the side wall position away from the heat-absorbing part.

[0015] As a further optimization of this utility model, the third through hole is located within the side projection range of the cooling fan.

[0016] In summary, this utility model has at least one of the following advantages:

[0017] (1) This utility model has a simple structure and reliable function. It uses a semiconductor heat sink to dissipate heat from the soft strip layer and the slider near the soft strip layer, thereby avoiding the problem of the soft strip layer softening, expanding and deforming due to heat, so as to ensure the smooth sliding and matching accuracy between the slide rail and the slider, and further improve the machining accuracy of the CNC machine tool.

[0018] (2) The cooling fan can accelerate the heat dissipation speed of the heat dissipation part of the semiconductor heat sink, thereby ensuring the functional reliability of the semiconductor heat sink.

[0019] (3) The cooling fan can draw out the hot air from the inner cavity of the side fastener to dissipate heat from the heat-absorbing part, thus avoiding the problem of heat accumulation in the heat-absorbing part leading to heat absorption failure. Attached Figure Description

[0020] The present application will be further explained below with reference to the accompanying drawings:

[0021] Figure 1This is a sectional view of the overall structure of this utility model;

[0022] Figure 2 A cross-sectional view of the slide rail structure;

[0023] Figure 3 This is a sectional view of the interlocking plate structure.

[0024] Figure 4 This is an exploded view of the snap-fit ​​panel structure.

[0025] Figure 5 This is a schematic diagram of the vertical section of the limiting plate structure;

[0026] Figure 6 This is an exploded view of the limiting plate structure;

[0027] Figure 7 A cross-sectional view of a semiconductor heat sink structure;

[0028] Figure 8 This is a schematic diagram of the casing mounting position and structure viewed from the left.

[0029] Figure 9 This is a schematic diagram of the outer shell structure;

[0030] Figure 10 This is a left-side view of the casing mounting location and structure.

[0031] Figure 11 This is a vertical sectional view of the side fastener structure.

[0032] Explanation of reference numerals in the attached figures:

[0033] In the picture,

[0034] 1. Slide rail; 11. Main beam; 12. Track; 120. Sink groove;

[0035] 2. Slider; 201. Soft strip layer; 21. Fastening plate; 211. Main body; 2111. Top plate; 2112. Side plate; 212. Side fastener; 2121. First through hole; 2122. Second through hole; 2123. Third through hole; 22. Limiting plate; 221. First bottom plate; 222. Second bottom plate;

[0036] 3. Semiconductor heat sink; 31. Heat absorption part; 32. Heat dissipation part;

[0037] 4. Cooling fan; 41. Housing; 411. Air inlet; 412. Slot; 413. Mounting fins; 42. Support frame; 43. Fan blades. Detailed Implementation

[0038] Based on the above-described structural features of this application, the implementation methods of this application will be further described as follows:

[0039] Reference Figure 1 This embodiment provides a guide mechanism for a CNC machine tool, including a slide rail 1 and a slider 2 mounted on the slide rail 1; a soft strip layer 201 is provided between the slide rail 1 and the slider 2, the outer side of the soft strip layer 201 is fixedly connected to the slider 2 (e.g., by adhesive bonding), and the inner side is slidably connected to the slide rail 1. The soft strip layer 201 is made of materials such as polytetrafluoroethylene, thus having excellent wear resistance.

[0040] Reference Figure 1 and Figure 7 This invention also includes a semiconductor heat sink 3, which includes a heat-absorbing part 31 and a heat-dissipating part 32. The heat-absorbing part 31 is inserted into the slider 2, and the heat-dissipating part 32 is fitted against the outer wall of the slider 2. The heat-absorbing part 31 is used to absorb the heat of the soft strip layer 201 and the slider 2 located near the soft strip layer 201, thereby avoiding the problems of the soft strip layer 201 softening, expanding, and deforming due to heat, so as to ensure the smooth sliding and fitting accuracy between the slide rail 1 and the slider 2, and further improve the machining accuracy of the CNC machine tool.

[0041] Reference Figures 1 to 7 The slider 2 includes a fastening plate 21 and a limiting plate 22. The fastening plate 21 includes a main body 211 for clamping the upper part of the heat-absorbing part 31 and a side fastener 212. The limiting plate 22 includes a first bottom plate 221 and a second bottom plate 222 for clamping the lower part of the heat-absorbing part 31.

[0042] Reference Figure 1 and Figure 2 The slide rail 1 includes a main beam 11 and two tracks 12, which are provided on both sides of the top surface of the main beam 11. The vertical cross-section of the slide rail 1 is Y-shaped. Both the main beam 11 and the tracks 12 are strip-shaped structures, thus providing a sufficiently long sliding distance for the slider 2. The tracks 12 are integrally fixedly connected to the main beam 11; the two tracks 12 are arranged parallel to each other.

[0043] Reference Figure 1 and Figure 2 Since the top surface of track 12 is higher than the top surface of main beam 11, a recessed groove 120 is formed between the two tracks 12. Therefore, after the slider 2 is engaged with the slide rail 1, the middle part of the top surface of the inner cavity of the slider 2 will not contact the slide rail 1, thereby reducing the contact area and friction between the slider 2 and the slide rail 1.

[0044] Reference Figure 1 The vertical cross-section of the snap-fit ​​plate 21 is n-shaped. The limiting plate 22 is set at the bottom of the snap-fit ​​plate 21. The limiting plate 22 is horizontally positioned with one end below the snap-fit ​​plate 21 and the other end below the track 12. The limiting plate 22 is used to prevent the slider 2 from separating from the slide rail 1, thereby improving the structural stability of this utility model.

[0045] Reference Figure 7The heat-absorbing part 31 has an S-shaped cross-section. (Refer to...) Figure 1 , Figure 2 and Figure 7 The cross-section of the soft strip layer 201 is C-shaped. The soft strip layer 201 covers the top wall, outer wall and bottom wall of the track 12. Therefore, the upper part of the S-shaped heat absorption part 31 is C-shaped and fits to cover the outer periphery of the soft strip layer 201, thereby increasing the heat absorption efficiency.

[0046] Reference Figure 1 , Figure 3 and Figure 4 The main body 211 includes a top plate 2111 and a side plate 2112. The top of the side plate 2112 is fixedly installed at the bottom of the side wall of the top plate 2111 (for example, by an integral fixed connection). The top plate 2111 has a straight plate structure, and the side plate 2112 has a bent plate structure. The vertical cross section of the side plate 2112 is shaped like a 7, so as to adapt to connect and support the upper part of the soft strip layer 201 and the heat absorption part 31.

[0047] Reference Figure 3 and Figure 4 The flexible strip layer 201 is attached to and fixedly connected to the side plate 2112 (e.g., by adhesive bonding). The side plate 2112 is pressed against and attached to the heat-absorbing part 31 of the semiconductor heat sink 3. The side fastener 212 is pressed against and attached to the heat-absorbing part 31 of the semiconductor heat sink 3, thereby increasing the heat conduction efficiency. The side fastener 212 is fixedly connected to the top plate 2111 (e.g., by bolts). The side fastener 212 supports the side plate 2112 and the flexible strip layer 201 from the outside to prevent the flexible strip layer 201 from separating from the slide rail 1. The side fastener is fixedly connected to the side plate 2112 (e.g., by bolts; the edge of the semiconductor heat sink 3 has a recessed half-hole for accommodating the bolt).

[0048] Reference Figure 3 and Figure 4 The side fastener 212 has a 7-shaped cross-section and is fastened to the outside of the side plate 2112. The upper part of the heat-absorbing part 31 is inserted into the first gap between the side fastener 212 and the side plate 2112. The first gap is used to accommodate the upper part of the heat-absorbing part 31, thereby avoiding the problem of deformation caused by the side fastener 212 and the side plate 2112 being squeezed against each other. Thermal grease is applied to the contact surface between the heat-absorbing part 31 and the side plate 2112 to increase the thermal conductivity.

[0049] Reference Figure 5 and Figure 6The first base plate 221 has a 7-shaped cross-section, and the second base plate 222 has an L-shaped cross-section. The first base plate 221 and the second base plate 222 are fitted together. The lower part of the heat-absorbing part 31 is inserted into a second gap between the first base plate 221 and the second base plate 222. The second gap is used to accommodate the lower part of the heat-absorbing part 31, thereby avoiding deformation caused by the first base plate 221 and the second base plate 222 being squeezed together. Thermally conductive silicone grease is applied to the contact surface between the heat-absorbing part 31 and the first base plate 221; thermally conductive silicone grease is also applied to the contact surface between the heat-absorbing part 31 and the second base plate 222, thereby increasing the thermal conductivity.

[0050] Reference Figures 3-6 The side fastener 212 is fixedly connected to the second base plate 222 by bolts. The first base plate 221 and the second base plate 222 are fixedly connected (for example, by bolts, with a recessed semi-hole for accommodating the bolts at the edge of the semiconductor heat sink 3). The first base plate 221 and the second base plate 222 are respectively disposed on both sides of the heat absorption part 31, thereby supporting and limiting the heat absorption part 31. The side fastener 212 and the side plate 2112 are respectively disposed on both sides of the heat absorption part 31, thereby supporting and limiting the heat absorption part 31.

[0051] Reference Figure 1 and Figure 8 A cooling fan 4 is provided on the outer wall of the slider 2, and the heat dissipation part 32 is inserted between the cooling fan 4 and the side fastener 212. The cooling fan 4 is used to accelerate the heat dissipation efficiency of the heat dissipation part 32, thereby avoiding the problem of heat accumulation leading to a decrease in the efficiency of the semiconductor heat sink 3.

[0052] Reference Figure 11 The side fastener 212 has a shell-like structure. A first through hole 2121 is provided on the side wall near the heat-absorbing part 31, a second through hole 2122 is provided on the top wall of the side fastener 212, and a third through hole 2123 is provided on the side wall away from the heat-absorbing part 31. The cooling fan 4 draws hot air from the inner cavity of the side fastener 212 through the third through hole 2123. Outside air flows into the inner cavity of the side fastener 212 through the second through hole 2122, thus ensuring air pressure balance within the inner cavity of the side fastener 212. Air within the inner cavity of the side fastener 212 can flow into the first through hole 2121 or flow back into the inner cavity of the side fastener 212 from the first through hole 2121, thereby accelerating the cooling of the heat-absorbing part 31. The first through hole 2121 and the third through hole 2123 are arranged opposite each other.

[0053] Reference Figure 11 If the third through hole 2123 is located within the side projection range of the cooling fan 4, then the cooling fan 4 can generate negative pressure at the outer end opening of the third through hole 2123 to facilitate the discharge of gas from the inner cavity of the side fastener 212.

[0054] Reference Figures 8-10The cooling fan 4 includes a housing 41, a support frame 42, a motor, and fan blades 43. The housing 41 has a cylindrical structure with openings at both ends. A strip-shaped air inlet 411 is provided at one end of the side wall of the housing 41 near the side fastener 212, thereby accelerating airflow. Mounting fins 413 are fixedly mounted on the outer surface of the side wall of the housing 41 (e.g., through an integral fixed connection). The mounting fins 413 are attached to the outer surface of the side fastener 212 and fixedly connected (e.g., through bolts). The support frame 42 is disposed inside the housing 41, and its outer edge is fixedly connected to the housing 41 (e.g., through bolts). The motor housing is fixedly mounted to the middle of the support frame 42 by bolts, and the fan blades 43 are fixedly mounted to the output shaft of the motor by bolts. The motor can drive the fan blades 43 to rotate, thereby blowing the air inside the housing 41 away from the side fastener 212.

[0055] Reference Figure 8 and Figure 9 The bottom surface of the outer casing 41 is provided with a slot 412 for the heat dissipation part 32 near the edge of the side fastener 212, and the top surface of the outer casing 41 is provided with a slot 412 for the heat dissipation part 32 near the edge of the side fastener 212. The heat dissipation part 32 is inserted into the two slots 412, so that the outer casing 41 can press the heat dissipation fins onto the side fastener 212, thereby avoiding the problem of the heat dissipation fins warping and colliding with the fan blades 43.

[0056] Reference Figure 8 and Figure 10 The heat dissipation unit 32 is fixed to the side fastener 212 by adhesive bonding to further increase the fixing force and prevent the heat sink from being accidentally pulled out of the slot 412. The third vent is provided on both sides of the heat dissipation unit 32 to prevent the heat dissipation unit 32 from blocking the third vent.

[0057] Reference Figure 1 and Figure 6 The heat dissipation part 32 is provided on the bottom and outer sides of the second base plate 222, and the heat dissipation part 32 is fixed to the second base plate 222 by adhesive bonding.

[0058] Semiconductor heat sink 3 is an electrically driven semiconductor heat sink (such as a Bi2Te3-Sb2Te3 or Bi2Te3-Bi2Se3 semiconductor cooler based on bismuth telluride). Semiconductor heat sink 3 is connected to the power system of the CNC machine tool through wires to achieve operation.

[0059] The side fastener 212 is made of rigid plastic material (such as PP plastic, ABS plastic, etc.) to support the semiconductor heat sink 3 and make the present invention have a low weight.

[0060] This invention features a simple structure and reliable function. It utilizes a semiconductor heat sink 3 to dissipate heat from the flexible strip layer 201 and the nearby slider 2, thus preventing the flexible strip layer 201 from softening, expanding, or deforming due to heat. This ensures smooth sliding and precise engagement between the slide rail 1 and the slider 2, further improving the machining accuracy of the CNC machine tool. Because the flexible strip layer 201 is located on the inner wall of the n-shaped slider 2, and the gap between the slider 2 and the slide rail 1 is small, airflow is difficult to penetrate this gap, rendering traditional fan cooling methods ineffective. This invention employs a semiconductor heat sink 3 for heat dissipation, resulting in excellent heat dissipation efficiency and effectiveness.

[0061] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] In conclusion, for those skilled in the art, any changes, modifications, substitutions, or variations made to this utility model based on its guidance, without departing from its principles and spirit, shall still fall within the protection scope of this utility model.

Claims

1. A guide sliding mechanism for CNC machine tools, characterized in that: It includes a slide rail (1) and a slider (2) mounted on the slide rail (1); a soft strip layer (201) is provided between the slide rail (1) and the slider (2), the outer side of the soft strip layer (201) is fixedly connected to the slider (2), and the inner side is slidably connected to the slide rail (1); It also includes a semiconductor heat sink (3), which includes a heat absorption part (31) and a heat dissipation part (32). The heat absorption part (31) is inserted into the inside of the slider (2), and the heat dissipation part (32) is attached to the outer wall of the slider (2). The slider (2) includes a fastening plate (21) and a limiting plate (22). The fastening plate (21) includes a main body (211) for clamping the upper part of the heat-absorbing part (31) and a side fastener (212). The limiting plate (22) includes a first bottom plate (221) and a second bottom plate (222) for clamping the lower part of the heat-absorbing part (31).

2. The guide sliding mechanism for CNC machine tools according to claim 1, characterized in that: The slide rail (1) includes a main beam (11) and a track (12). There are two tracks (12) and they are arranged on both sides of the top surface of the main beam (11). The vertical cross section of the slide rail (1) is Y-shaped.

3. The guide sliding mechanism for CNC machine tools according to claim 2, characterized in that: The vertical cross section of the fastening plate (21) is n-shaped. The limiting plate (22) is located at the bottom end of the fastening plate (21). The limiting plate (22) is horizontally positioned with one end below the fastening plate (21) and the other end below the track (12).

4. The guide sliding mechanism for CNC machine tools according to claim 3, characterized in that: The heat-absorbing part (31) has an S-shaped cross-section.

5. The guide sliding mechanism for CNC machine tools according to claim 4, characterized in that: The main body (211) includes a top plate (2111) and a side plate (2112). The top of the side plate (2112) is fixedly installed at the bottom of the side wall of the top plate (2111). The top plate (2111) has a straight plate structure, and the side plate (2112) has a bent plate structure. The vertical cross section of the side plate (2112) is shaped like the number 7.

6. The guide sliding mechanism for CNC machine tools according to claim 5, characterized in that: The side fastener (212) has a vertical cross-section in the shape of a number 7, and the side fastener (212) is fastened to the outside of the side plate (2112); the upper part of the heat absorption part (31) is inserted into the first gap between the side fastener (212) and the side plate (2112).

7. The guide sliding mechanism for CNC machine tools according to claim 6, characterized in that: The first base plate (221) has a 7-shaped vertical cross section, and the second base plate (222) has an L-shaped vertical cross section. The first base plate (221) and the second base plate (222) are fitted together. The heat absorption part (31) is inserted into the second gap between the first base plate (221) and the second base plate (222).

8. The guide sliding mechanism for CNC machine tools according to claim 7, characterized in that: The outer wall of the slider (2) is provided with a heat dissipation fan (4), and the heat dissipation part (32) is inserted between the heat dissipation fan (4) and the side fastener (212).

9. The guide sliding mechanism for CNC machine tools according to claim 8, characterized in that: The side fastener (212) has a shell-like structure; the side fastener (212) has a first through hole (2121) near the side wall of the heat-absorbing part (31), a second through hole (2122) on the top wall of the side fastener (212), and a third through hole (2123) on the side wall away from the heat-absorbing part (31).

10. The guide sliding mechanism for CNC machine tools according to claim 9, characterized in that: The third through hole (2123) is located within the side projection range of the cooling fan (4).

Images