A translation mechanism for a machine tool

Abstract

The utility model provides a kind of translation mechanism for machine tool, belong to mechanical technical field.It solves the problem of poor transmission accuracy of existing mechanism.The translation mechanism for machine tool includes rack, drive plate, screw rod being horizontally rotationally arranged on rack and guide rod being horizontally fixed on rack, drive plate is equipped with respectively for the upper through-hole and lower through-hole of screw rod and guide rod passing, upper through-hole and lower through-hole are respectively fixed with nut matched with screw rod and guide sleeve matched with guide rod, drive plate is provided with heat dissipation structure between guide sleeve and nut, heat dissipation structure includes water inlet hole and water outlet hole being horizontally opened on drive plate along guide rod axial direction, water passing groove is axially opened on the inner wall of upper through-hole, and closed water passing cavity is formed between water passing groove and nut outer wall;Drive plate is also vertically equipped with water passing hole, water passing hole upper end is connected with water passing cavity, and the end of water inlet hole and water outlet hole adjacent is connected with water passing hole.The translation mechanism for machine tool is high in transmission accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a machine tool, particularly a translation mechanism for a machine tool. Background Technology

[0002] The translation mechanism is an important component of a machine tool. Its structure can be referenced from a fully automatic scanning device for high-precision PCB inspection equipment disclosed in the Chinese Patent Database (Application No.: CN208367707U). This device includes a transmission table, a vertical moving plate, and a shock-absorbing and stabilizing module. A mounting frame is connected to the side of the transmission table via a fixing nut. A display screen is installed on the upper left side of the mounting frame. A lead screw is connected between the upper left and right walls of the mounting frame via a bearing. A first motor is installed on the upper right side of the mounting frame, and the first motor is connected to the lead screw via a motor shaft. A sliding rod is fixedly connected between the upper left and right walls of the mounting frame, and a sliding sleeve is fitted onto the lead screw. A left and right moving plate is fixedly connected to the lower end of the sliding sleeve. The moving plate has several telescopic rods symmetrically arranged on its lower edge. The lower ends of the telescopic rods are connected to the upper and lower moving plates. The upper middle part of the upper and lower moving plates is connected to a second motor via a motor frame. The lower end of the second motor is connected to a rotating shaft via a coupling. The lower end of the rotating shaft passes through the upper and lower moving plates and is connected to a rotating adjustment seat. Several arc-shaped light poles are arranged on the lower edge of the upper and lower moving plates. The other end of each arc-shaped light pole is equipped with a lighting lamp. The inner wall of the rotating adjustment seat is connected to the scanning gun via a shock-absorbing and stabilizing module. The shock-absorbing and stabilizing module includes a fixed sleeve, a shock-absorbing adjustment rod, a limit block, and springs. The right part of the shock-absorbing adjustment rod is located inside the fixed sleeve. The right end of the shock-absorbing adjustment rod is equipped with a limit block, and the right end of the limit block is equipped with several springs.

[0003] In the above-mentioned device, the sliding sleeve is both threaded on the lead screw and slidably mounted on the slide rod, which results in a relatively concentrated heat at the sliding sleeve during operation. Moreover, the increased heat can easily cause thermal expansion or thermal extension of the lead screw, reducing the lead screw accuracy and affecting translation accuracy and stability. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a translation mechanism for machine tools that can improve transmission accuracy.

[0005] The objective of this utility model can be achieved through the following technical solution: A translation mechanism for a machine tool includes a frame, a drive plate, a lead screw horizontally rotatably mounted on the frame, and a guide rod horizontally fixed on the frame. The lead screw and guide rod are arranged side by side, one above the other. The drive plate has an upper through hole and a lower through hole for the lead screw and guide rod to pass through, respectively. A nut that mates with the lead screw and a guide sleeve that mates with the guide rod are fixed in the upper through hole and the lower through hole, respectively. The characteristic feature is that the drive plate has a heat dissipation structure between the guide sleeve and the nut. The heat dissipation structure includes a water inlet hole and a water outlet hole horizontally opened on the drive plate along the axial direction of the guide rod, and the water inlet hole and the water outlet hole are distributed along the axial direction of the guide rod. A water passage groove is axially opened on the inner wall of the upper through hole, and a closed water passage cavity is formed between the water passage groove and the outer wall of the nut. A water passage hole is also vertically provided in the drive plate. The lower end of the water passage hole is closed, and the upper end of the water passage hole is connected to the water passage cavity. The adjacent ends of the water inlet hole and the water outlet hole are both connected to the water passage hole.

[0006] During use, cooling water enters the water passage through the inlet hole and flows into the closed cavity to contact the nut. The cooling water is finally discharged through the outlet hole and circulates between the inlet hole and the outlet hole.

[0007] The drive board has a water-cooled heat dissipation structure between the guide sleeve and the nut. This not only effectively isolates the heat transfer between the nut and the guide sleeve, but also facilitates the rapid heat dissipation of the nut and the guide sleeve. This reduces the impact of high temperature on the fit accuracy between the nut and the lead screw, as well as between the guide sleeve and the guide rod, and effectively improves translation accuracy and stability.

[0008] In the aforementioned translation mechanism for a machine tool, the nut consists of a nut body and a sealing ring mounted on one end of the nut body, with the outer wall of the sealing ring contacting and sealing the inner wall of the upper through hole. The other end of the nut body extends out of the upper through hole, and the outer wall of the other end of the nut body has an annular shoulder. The annular shoulder presses against the drive plate and closes one of the openings of the upper through hole. The aforementioned water passage groove is disposed between the sealing ring and the annular shoulder. The end of the water passage groove near the sealing ring is closed, and the other end of the water passage groove is open and extends to the edge of the upper through hole. This design facilitates the formation of the water passage cavity, reducing processing and design difficulties.

[0009] In the aforementioned translation mechanism for machine tools, an annular mounting groove is provided on the side of the drive plate, and the mounting groove and the upper through hole are coaxially arranged; an annular rubber pad is provided inside the mounting groove, and the two ends of the rubber pad contact and seal with the bottom wall of the mounting groove and the annular pressure shoulder, respectively. The rubber pad enhances the sealing effect between the drive plate and the annular pressure shoulder, making the water passage cavity more stable and well-formed.

[0010] In the translation mechanism of the machine tool described above, the water channel is annular and coaxial with the nut body. This allows the water channel to surround the nut body, further accelerating heat dissipation and improving the transmission accuracy of the translation mechanism.

[0011] In the translation mechanism of the aforementioned machine tool, the annular pressure shoulder is fixedly connected to the drive plate by several horizontally arranged upper bolts; one of the upper bolts is hollow and screwed into the water inlet hole. In use, the hollow upper bolt is connected to the cooling water connector. At this time, the upper bolt serves both as a positioning nut and as a water supply, achieving a dual-purpose effect, simplifying the structure and facilitating assembly.

[0012] In the translation mechanism of the machine tool described above, the guide sleeve is fixedly connected to the drive plate by several horizontally arranged lower bolts; one of the lower bolts is hollow and screwed into the water outlet hole.

[0013] In the translation mechanism of the machine tool described above, the inner hole of the hollow upper bolt is composed of a polygonal hole and a threaded hole. The polygonal hole is located at the corresponding upper bolt head position, which facilitates the installation of the upper bolt and, with the help of the threaded hole, facilitates the connection of the upper bolt to the cooling water connector.

[0014] In the translation mechanism of the machine tool described above, the inner hole of the hollow lower bolt is composed of a polygonal hole and a threaded hole. The polygonal hole is located at the corresponding lower bolt head position, which facilitates the installation of the lower bolt and, with the help of the threaded hole, facilitates the connection of the lower bolt to the cooling water connector.

[0015] In the translation mechanism of the machine tool described above, the water inlet and water outlet are staggered.

[0016] Compared with existing technologies, the translation mechanism for machine tools has the following advantages: 1. The drive board has a water-cooled heat dissipation structure between the guide sleeve and the nut. This not only effectively isolates the heat transfer between the nut and the guide sleeve, but also facilitates the rapid heat dissipation of the nut and the guide sleeve. This reduces the impact of high temperature on the fit accuracy between the nut and the lead screw, as well as between the guide sleeve and the guide rod, and effectively improves translation accuracy and stability.

[0017] 2. When in use, the hollow upper and lower bolts are used to connect the cooling water connector. That is, the upper and lower bolts are used to position the nut and guide sleeve respectively, and also to transport the cooling water, which has the effect of dual use. This simplifies the structure and facilitates assembly. Attached Figure Description

[0018] Figure 1 It is a 3D schematic diagram of the machine tool.

[0019] Figure 2 This is a cross-sectional view of the machine tool.

[0020] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0021] Figure 4 This is a structural diagram of the upper or lower bolt.

[0022] In the diagram, 1. Frame; 2. Drive plate; 2a. Upper through hole; 2b. Lower through hole; 2c. Water inlet; 2d. Water outlet; 2e. Water channel; 2f. Water passage hole; 3. Lead screw; 4. Guide rod; 5. Nut; 5a. Nut body; 5b. Sealing ring; 5c. Annular shoulder; 6. Guide sleeve; 7. Rubber pad; 8. Upper bolt; 8a. Polygonal hole one; 8b. Threaded hole one; 9. Lower bolt; 9a. Polygonal hole two; 9b. Threaded hole two; 10. O-ring. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 As shown, the translation mechanism for the machine tool includes a frame 1, a drive plate 2, a lead screw 3 horizontally rotatably mounted on the frame 1, and a guide rod 4 horizontally fixed on the frame 1. In the actual product, both ends of the lead screw 3 are rotatably mounted on the frame 1 via bearings; both ends of the guide rod 4 are fixedly connected to the frame 1.

[0025] in, The drive plate 2 is used to support the driven component, and in actual use, the drive plate 2 is set vertically.

[0026] The lead screw 3 and guide rod 4 are arranged side by side, one above the other. The drive plate 2 has an upper through hole 2a and a lower through hole 2b that extend along the axial direction of the lead screw 3, and the lead screw 3 and guide rod 4 are respectively installed through the upper through hole 2a and the lower through hole 2b. A nut 5 that mates with the lead screw 3 and a guide sleeve 6 that mates with the guide rod 4 are respectively fixed in the upper through hole 2a and the lower through hole 2b. The nut 5 is coaxial with the upper through hole 2a and is installed on the lead screw 3; the guide sleeve 6 is coaxial with the lower through hole 2b and is sleeved on the outside of the guide rod 4.

[0027] like Figure 2 and Figure 3 As shown, the drive plate 2 has a heat dissipation structure between the guide sleeve 6 and the nut 5. This heat dissipation structure includes a water inlet hole 2c and a water outlet hole 2d horizontally opened along the axial direction of the guide rod 4 on the drive plate 2, and the water inlet hole 2c and the water outlet hole 2d are distributed along the axial direction of the guide rod 4. Preferably, the positions of the water inlet hole 2c and the water outlet hole 2d are staggered. Among them, a water passage groove 2e is axially opened on the inner wall of the upper through hole 2a, and a closed water passage cavity is formed between the water passage groove 2e and the outer wall of the nut 5. A water passage hole 2f is also vertically provided inside the drive plate 2. The lower end of the water passage hole 2f is closed, and the upper end of the water passage hole 2f is connected to the water passage cavity. The adjacent ends of the water inlet hole 2c and the water outlet hole 2d are both connected to the water passage hole 2f. In the actual product, the axes of the water inlet hole 2c and the water outlet hole 2d are both perpendicular to the axis of the water passage hole 2f.

[0028] During use, cooling water enters through the inlet hole 2c and then flows into the closed cavity to contact the nut 5. The cooling water is finally discharged through the outlet hole 2d and circulates between the inlet hole 2c and the outlet hole 2d.

[0029] The drive board 2 has a water-cooled heat dissipation structure between the guide sleeve 6 and the nut 5. This not only effectively isolates the heat transfer between the nut 5 and the guide sleeve 6, but also facilitates the rapid heat dissipation of the nut 5 and the guide sleeve 6. This reduces the impact of high temperature on the fit accuracy between the nut 5 and the lead screw 3 and between the guide sleeve 6 and the guide rod 4, and effectively improves the translation accuracy and stability.

[0030] In this embodiment, The water passage cavity forming method is as follows: The nut 5 consists of a nut body 5a and a sealing ring 5b installed on one end of the nut body 5a, with the outer wall of the sealing ring 5b contacting and sealing the inner wall of the upper through hole 2a. The other end of the nut body 5a extends out of the upper through hole 2a, and the outer wall of the other end of the nut body 5a has an annular shoulder 5c, with the nut 5 and the annular shoulder 5c coaxially arranged. The annular shoulder 5c presses against the drive plate 2 and closes one of the openings of the upper through hole 2a. A water passage groove 2e is set between the sealing ring 5b and the annular shoulder 5c, with one end of the water passage groove 2e near the sealing ring 5b closed, and the other end of the water passage groove 2e open and extending to the edge of the upper through hole 2a. This design facilitates the forming of the water passage cavity, reducing processing and design difficulties.

[0031] The sealing ring 5b is installed as follows: a positioning groove that is annular and coaxial with the nut body 5b is provided on the side wall of the nut body 5a, and the sealing ring 5b is set in the positioning groove.

[0032] To further explain, the drive plate 2 has an annular mounting groove on its side facing the annular shoulder 5c, and the mounting groove and the upper through hole 2a are coaxially arranged. An annular rubber gasket 7 is provided inside the mounting groove, and the two ends of the rubber gasket 7 contact and seal with the bottom wall of the mounting groove and the annular shoulder 5c, respectively. The rubber gasket 7 enhances the sealing effect between the drive plate 2 and the annular shoulder 5c, making the water passage cavity more stable and well-formed.

[0033] Preferably, the water passage 2e is an annular shape coaxial with the nut body 5a. In this case, the water passage cavity is also annular, which makes the water passage cavity surround the nut body 5a, further accelerating heat dissipation and improving the transmission accuracy of the translation mechanism.

[0034] like Figure 1 As shown, the connection between the nut body 5a and the drive plate 2 is as follows: the annular shoulder 5c is fixedly connected to the drive plate 2 by several horizontally arranged upper bolts 8, and the axis of the upper bolts 8 extends along the axial direction of the lead screw 3. One of the upper bolts 8 is hollow and screwed into the water inlet hole 2c. At this time, both ends of the inner hole of the hollow upper bolt 8 are open.

[0035] The guide sleeve 6 is installed as follows: the guide sleeve 6 is fixedly connected to the drive plate 2 by several horizontally arranged lower bolts 9, and the axis of the lower bolts 9 extends along the axial direction of the lead screw 3. One of the lower bolts 9 is hollow and screwed into the water outlet hole 2d.

[0036] In use, the hollow upper bolt 8 and lower bolt 9 are used to connect the cooling water connector. That is, at this time, the upper bolt 8 and lower bolt 9 are used to position the nut 5 and the guide sleeve 6 respectively, and also to transport the cooling water, which has the effect of dual use. This simplifies the structure and facilitates assembly.

[0037] To further explain, such as Figure 3 and Figure 4 As shown, the inner hole of the hollow upper bolt 8 consists of a polygonal hole 8a and a threaded hole 8b. The polygonal hole 8a is located at the head of the upper bolt 8, which facilitates the installation of the upper bolt 8 and, with the help of the threaded hole 8b, facilitates the connection of the upper bolt 8 to the cooling water connector. The inner hole of the hollow lower bolt 9 consists of a polygonal hole 9a and a threaded hole 9b. The polygonal hole 9a is located at the head of the lower bolt 9, which facilitates the installation of the lower bolt 9 and, with the help of the threaded hole 9b, facilitates the connection of the lower bolt 9 to the cooling water connector.

[0038] In the actual product, both the hollow upper bolt 8 and the hollow lower bolt 9 have annular grooves on their outer walls. O-rings 10 are provided in both annular grooves, and the outer walls of the two O-rings 10 are respectively in contact with and sealed to the inner walls of the water inlet 2c and the water outlet 2d.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A translation mechanism for a machine tool, comprising a frame (1), a drive plate (2), a lead screw (3) horizontally rotatably mounted on the frame (1), and a guide rod (4) horizontally fixed on the frame (1), wherein the lead screw (3) and the guide rod (4) are arranged side by side, and the drive plate (2) is provided with an upper through hole (2a) and a lower through hole (2b) for the lead screw (3) and the guide rod (4) to pass through respectively, wherein a nut (5) cooperating with the lead screw (3) and a guide sleeve (6) cooperating with the guide rod (4) are respectively fixed in the upper through hole (2a) and the lower through hole (2b), characterized in that, The drive plate (2) has a heat dissipation structure between the guide sleeve (6) and the nut (5). The heat dissipation structure includes a water inlet hole (2c) and a water outlet hole (2d) horizontally opened on the drive plate (2) along the axial direction of the guide rod (4), and the water inlet hole (2c) and the water outlet hole (2d) are distributed along the axial direction of the guide rod (4); a water passage groove (2e) is axially opened on the inner wall of the upper through hole (2a), and a closed water passage cavity is formed between the water passage groove (2e) and the outer wall of the nut (5); a water passage hole (2f) is also vertically provided in the drive plate (2). The lower end of the water passage hole (2f) is closed, and the upper end of the water passage hole (2f) is connected to the water passage cavity. The adjacent ends of the water inlet hole (2c) and the water outlet hole (2d) are both connected to the water passage hole (2f).

2. The translation mechanism for a machine tool according to claim 1, characterized in that, The nut (5) mentioned above is composed of a nut body (5a) and a sealing ring (5b) installed on one end of the nut body (5a), and the outer wall of the sealing ring (5b) contacts and seals the inner wall of the upper through hole (2a); the other end of the nut body (5a) extends out of the upper through hole (2a), and the outer wall of the other end of the nut body (5a) has an annular shoulder (5c), which presses against the drive plate (2) and closes one of the openings of the upper through hole (2a); The aforementioned water passage groove (2e) is disposed between the sealing ring (5b) and the annular shoulder (5c). The end of the water passage groove (2e) near the sealing ring (5b) is closed, and the other end of the water passage groove (2e) is open and extends to the edge of the upper through hole (2a).

3. The translation mechanism for a machine tool according to claim 2, characterized in that, The drive plate (2) has an annular mounting groove on its side, and the mounting groove and the upper through hole (2a) are coaxially arranged; the mounting groove is provided with an annular rubber pad (7), and the two ends of the rubber pad (7) are in contact with the bottom wall of the mounting groove and the annular shoulder (5c) respectively for sealing.

4. The translation mechanism for a machine tool according to claim 2 or 3, characterized in that, The water channel (2e) is an annular shape coaxial with the nut body (5a).

5. The translation mechanism for a machine tool according to claim 1, characterized in that, The annular shoulder (5c) is fixedly connected to the drive plate (2) by several horizontally arranged upper bolts (8); one of the upper bolts (8) is hollow and screwed into the water inlet hole (2c).

6. The translation mechanism for a machine tool according to claim 5, characterized in that, The guide sleeve (6) is fixedly connected to the drive plate (2) by several horizontally arranged lower bolts (9); one of the lower bolts (9) is hollow and screwed into the water outlet hole (2d).

7. The translation mechanism for a machine tool according to claim 5, characterized in that, The inner hole of this hollow upper bolt (8) consists of a polygonal hole (8a) and a threaded hole (8b), with the polygonal hole (8a) located at the head of the corresponding upper bolt (8).

8. The translation mechanism for a machine tool according to claim 6, characterized in that, The inner hole of this hollow bolt (9) is composed of a polygonal hole (9a) and a threaded hole (9b), and the polygonal hole (9a) is located at the head of the corresponding bolt (9).

9. The translation mechanism for a machine tool according to claim 1, characterized in that, The inlet (2c) and outlet (2d) are positioned separately.

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