Numerically controlled machine tool and its ram transmission mechanism

Abstract

The present application relates to a kind of numerical control machine tool and its ram transmission mechanism.In the ram transmission mechanism, ram and slide are slidably connected along the first direction, and the slide is sleeved on the periphery of the ram.The outer wall surface of the ram includes the matching surface of the inner wall surface close to the slide and the non-matching surface not in contact with the inner wall surface of the slide.The grating ruler includes a fixed ruler and a reading head.The fixed ruler is in the shape of a long strip and is installed on the non-matching surface along the first direction.The reading head is installed on the slide.Through the structural setting of the ram, the outer wall surface of the ram has the matching surface and the non-matching surface.The matching surface is close to the inner wall surface of the slide to limit the sliding direction of the ram relative to the slide.The non-matching surface is not in contact with the inner wall surface of the slide and can be used to install the fixed ruler of the grating ruler.In this way, the ram with a longer length can not only provide stable support for the fixed ruler, but also is less likely to tip over, which is beneficial to maintaining a high degree of parallelism between the length direction of the fixed ruler and the sliding direction of the ram, and improving the measurement accuracy of the grating ruler.

Description

Technical Field

[0001] This invention relates to the field of CNC machining equipment technology, specifically to a CNC machine tool and its slide transmission mechanism. Background Technology

[0002] Currently, structural components made of aluminum alloys, steel, and composite materials used in aerospace, high-speed rail, and shipbuilding industries all require high machining accuracy. In CNC machine tools, the slide transmission mechanism, equipped with a linear encoder, enables fully closed-loop control, resulting in high machining accuracy. This has led to the widespread application of CNC machine tools in the machining of structural components.

[0003] In conventional CNC machine tools, when the slide block of the ram transmission mechanism is fitted around the ram, the outer wall surface of the ram mates with the inner wall surface of the slide block to allow for a sliding connection between the ram and the slide block. Since the outer wall surface of the ram is a mating surface, it is inconvenient to install the fixed ruler of the grating ruler. Therefore, the fixed ruler is usually mounted on the slide block using a bracket, while the reading head of the grating ruler is installed at the end of the ram. Measurement is performed through the interaction between the reading head and the fixed ruler. However, because the fixed ruler is relatively long, a long bracket is required to provide support. Under the influence of gravity, the bracket and the fixed ruler are prone to tipping over, making it impossible to ensure a high degree of parallelism between the length direction of the fixed ruler and the sliding direction of the ram, thus reducing the measurement accuracy of the grating ruler. Summary of the Invention

[0004] Based on this, this application provides a slide transmission mechanism that improves the measurement accuracy of a grating ruler, and also provides a CNC machine tool.

[0005] A ram transmission mechanism, comprising:

[0006] Slide;

[0007] A slide block is slidably connected to the slide block along a first direction, the slide block being sleeved around the periphery of the slide block; the outer wall surface of the slide block includes a mating surface that is in close contact with the inner wall surface of the slide block and a non-matting surface that does not contact the inner wall surface of the slide block; and

[0008] The grating ruler includes a fixed ruler and a reading head. The fixed ruler extends in a long strip along the first direction and is installed on the non-mating surface. The reading head is installed on the slide.

[0009] In the aforementioned slide transmission mechanism, the slide is structurally designed so that its outer wall has a mating surface and a non-matting surface. The mating surface is in close contact with the inner wall of the slide block, limiting the sliding direction of the slide relative to the slide block to a first direction. The non-matting surface does not contact the inner wall of the slide block and can be used to mount the fixed scale of the grating ruler. Thus, the slide with a longer length not only provides stable support for the fixed scale, but also makes the slide less prone to tipping over. This helps to maintain a high degree of parallelism between the length direction of the fixed scale and the sliding direction of the slide. Even if the slide and the fixed scale tip over slightly under the action of gravity, since they tip over synchronously and the slide block limits the movement of the slide, the length direction of the fixed scale and the sliding direction of the slide can still be maintained in the same direction (i.e., the first direction), thus maintaining a high degree of parallelism and improving the measurement accuracy of the grating ruler.

[0010] In one embodiment, the non-mating surface is recessed into the interior of the slide relative to the mating surface to form a mounting groove, the mounting groove extending along the first direction, and the fixed length is received in the mounting groove.

[0011] In one embodiment, there are multiple mating surfaces, which are arranged sequentially along the circumference of the slide block. The inner wall surface of the slide block is in surface-to-surface contact with the multiple mating surfaces to limit the sliding direction of the slide block to the first direction. At least one of the multiple mating surfaces has the mounting groove formed on it.

[0012] In one embodiment, the slide transmission mechanism further includes a spindle box, which is mounted on one end of the slide along the first direction; the spindle box has a receiving groove corresponding to the position of the mounting groove, the receiving groove is connected to the mounting groove, and part of the fixed length extends from the mounting groove to the receiving groove.

[0013] In one embodiment, the mounting groove has a first mounting surface for mounting the fixed ruler, and the receiving groove has a second mounting surface for mounting the fixed ruler, the second mounting surface being higher than the first mounting surface; the ram transmission mechanism further includes a gasket, the gasket being received in the mounting groove and sandwiched between the first mounting surface and the fixed ruler, the side of the gasket facing away from the first mounting surface being flush with the second mounting surface.

[0014] In one embodiment, the slide transmission mechanism further includes a connector that connects the fixed length to the first mounting surface; the gasket has a through hole, the connector passes through the gasket and is accommodated in the through hole; the through hole extends toward the edge of the gasket to form a notch through which the connector can pass.

[0015] In one embodiment, the slide transmission mechanism further includes a bracket mounted on the spindle box; the receiving groove extends along the first direction and penetrates the spindle box, and the receiving groove has a first opening near the mounting groove and a second opening away from the mounting groove, with the portion of the fixed length exposed in the second opening mounted on the bracket.

[0016] In one embodiment, the slide block has a hollow space inside that allows an oil pipeline to pass through.

[0017] In one embodiment, the slide transmission mechanism further includes a support mounted on the slide, and the reading head is mounted on the support.

[0018] A CNC machine tool includes the aforementioned slide transmission mechanism.

[0019] Because the grating ruler in the ram transmission mechanism has high measurement accuracy, the CNC machine tool with the ram transmission mechanism has high machining accuracy. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the slide ram transmission mechanism according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 The cross-sectional view of the slide ram transmission mechanism shown at point AA;

[0023] Figure 3 for Figure 2 Enlarged structural diagram at point B;

[0024] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point C;

[0025] Figure 5 for Figure 2 Enlarged structural diagram at point D;

[0026] Figure 6 for Figure 1 A schematic diagram of the installation of the slide and shims in the slide transmission mechanism shown;

[0027] Figure 7 for Figure 6A schematic diagram of the gasket structure shown;

[0028] Figure 8 for Figure 1 The diagram shows the structure of the grating ruler in the slide ram transmission mechanism.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Slide transmission mechanism; 10. Slide seat; 11. Slide rail; 20. Slide ram; 21. Mating surface; 22. Non-mating surface; 23. Mounting groove; 231. First mounting surface; 24. Hollow space; 30. Grating ruler; 31. Fixed ruler; 32. Reading head; 33. Protective cover plate; 40. Spindle box; 41. Receiving groove; 411. Second mounting surface; 42. Box body; 43. Box cover; 44. Connecting plate; 50. Gasket; 51. Through hole; 52. Notch; 60. Bracket; 70. Support; 80. Drive assembly; 81. Motor; 82. Mounting seat. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] Combination Figures 1 to 8 As shown, this application protects a slide transmission mechanism 1, and also protects a CNC machine tool having the slide transmission mechanism 1. It is understood that the CNC machine tool can be a gantry machine tool, a vertical machine tool, or a horizontal machine tool.

[0036] In some embodiments, the ram transmission mechanism 1 includes a slide 10, a ram 20, and a grating ruler 30. The ram 20 and the slide 10 are slidably connected along a first direction, with the slide 10 sleeved around the periphery of the ram 20. The outer wall surface of the ram 20 includes a mating surface 21 that is in close contact with the inner wall surface of the slide 10 and a non-matting surface 22 that does not contact the inner wall surface of the slide 10. The grating ruler 30 includes a fixed ruler 31 and a reading head 32. The fixed ruler 31 extends in a long strip along the first direction and is mounted on the non-matting surface 22, while the reading head 32 is mounted on the slide 10.

[0037] It can be understood that the slide block 10 is a fixed structural component in the slide block transmission mechanism 1, while the slide block 20 is a movable structural component in the slide block transmission mechanism 1. During the sliding process of the slide block 20 relative to the slide block 10, the slide block 20 drives the fixed ruler 31 to move relative to the reading head 32, so that the reading head 32 cooperates with the fixed ruler 31 to measure the sliding amount of the slide block 20 relative to the slide block 10, thereby facilitating the grasp and control of the processing amount of the structural component.

[0038] It is understood that a slide rail 11 is formed inside the slide block 10, and the inner wall surface of the slide rail 11 can be in surface contact with the mating surface 21 of the slide block 20, thereby preventing the slide block 20 from moving in a direction perpendicular to the first direction, and making the slide block 20 move only relative to the slide block 10 in the first direction, thereby limiting the movement direction of the slide block 20 in the slide rail 11 to the first direction.

[0039] In the aforementioned ram transmission mechanism 1, the ram 20 is structurally configured such that its outer wall has a mating surface 21 and a non-matting surface 22. The mating surface 21 is in close contact with the inner wall of the slide block 10, thus limiting the sliding direction of the ram 20 relative to the slide block 10 to a first direction. The non-matting surface 22 does not contact the inner wall of the slide block 10 and can be used to mount the fixed ruler 31 of the grating ruler 30. In this way, the ram 20, which has a relatively long length, can not only provide stable support for the fixed ruler 31, but also makes it less likely to tip over. This helps to maintain a high degree of parallelism between the length direction of the fixed ruler 31 and the sliding direction of the ram 20. Even if the ram 20 and the fixed ruler 31 tip over slightly under the action of gravity, since they tip over synchronously and the slide block 10 limits the movement of the ram 20, the length direction of the fixed ruler 31 and the sliding direction of the ram 20 can still be kept in the same direction (i.e., the first direction) and maintain a high degree of parallelism, thereby improving the measurement accuracy of the grating ruler 30. Furthermore, since the fixed ruler 31 is mounted on the slide 20, there is no need to set a long bracket 60 on the slide 10 to support the fixed ruler 31, thereby improving the overall aesthetics of the structure.

[0040] Combination Figures 2 to 6 As shown, specifically in this application, the non-mating surface 22 is recessed into the interior of the slide block 20 relative to the mating surface 21 to form a mounting groove 23, the mounting groove 23 extends along the first direction, and the fixed length 31 is received in the mounting groove 23.

[0041] It is understandable that by forming the mounting groove 23 on the slide 20 to provide space for the installation of the fixed ruler 31, not only can the weight of the slide 20 be reduced by removing some material, but the fixed ruler 31 can also be protected from collision during the sliding of the slide 20 relative to the slide rail.

[0042] It is understood that the mounting groove 23 extends along the first direction and may penetrate the end face of the slide 20 at both ends, or may penetrate the end face of the slide 20 at only one end, or may not penetrate the end face of the slide 20 at either end.

[0043] It should be noted that in other embodiments, a portion of the inner wall surface of the slide 10 can be moved away from the non-mating surface 22, so that the non-mating surface 22 does not contact the inner wall surface of the slide 10, and a space is formed between them to accommodate the fixed ruler 31. In this case, the slide ram 20 will not have a mounting groove 23. After the fixed ruler 31 is installed on the non-mating surface 22, the fixed ruler 31 can also move with the slide ram 20 without contacting the slide 10.

[0044] Specifically, in this application, there are multiple mating surfaces 21, which are arranged sequentially along the circumference of the slide block 20. The inner wall surface of the slide block 10 simultaneously fits against the multiple mating surfaces 21, thereby limiting the sliding direction of the slide block 20 to a first direction. At least one of the multiple mating surfaces 21 has a mounting groove 23 formed on it.

[0045] Specifically, there are four mating surfaces 21, which together form a rectangle, making the cross-section of the slide 20 approximately rectangular. It can be understood that the four mating surfaces 21 are arranged in pairs opposite each other and are in full contact with the inner wall surface of the slide 10. Thus, the inner wall surface of the slide 10 prevents the slide 20 from moving in a direction perpendicular to the first direction. It should be noted that in other embodiments, the cross-section of the slide 20 can also be triangular, pentagonal, elliptical, or other shapes.

[0046] Specifically, among the multiple mating surfaces 21, only one mating surface 21 may have a mounting groove 23 formed on it. In this case, one mounting groove 23 is used to install the measuring rod 31. Alternatively, among the multiple mating surfaces 21, more than one mating surface 21 may have a mounting groove 23 formed on it. In this case, one mounting groove 23 is used to install the measuring rod 31, and the remaining mounting grooves 23 can be used to lay oil pipelines, conductive cables, etc.

[0047] Furthermore, the phrase "a mounting groove 23 is formed on a mating surface 21" can be understood as follows: in a planar region on the outer wall of the slide block 20, a portion of the surface is recessed to form a non-mating surface 22, thus forming a mounting groove 23, while the remaining portion becomes a mating surface 21. Therefore, when the mounting groove 23 extends along the first direction and penetrates the end face of the slide block 20 at both ends, the mating surface 21 is divided into two parts located on either side of the mounting groove 23. When the mounting groove 23 extends along the first direction and does not penetrate the end face of the slide block 20 at one or both ends, the two parts located on either side of the mounting groove 23 connect at the end of the mounting groove 23 to form a complete mating surface 21.

[0048] It is understood that by forming the mounting groove 23 on a mating surface 21, the mating surface 21 can be distributed on both sides of the mounting groove 23, and when the mating surface 21 is in contact with the inner wall surface of the slide 10, both parts on both sides of the mounting groove 23 can be in contact with the inner wall surface of the slide 10.

[0049] In this application, the area on the inner wall of the slide 10 that mates with the mating surface 21 is covered with a soft strip (not shown). The slide ram 20 indirectly contacts the slide 10 through the soft strip. This fully utilizes the advantages of the soft strip's wear resistance and ease of replacement, overcoming the disadvantage of high maintenance costs when the slide ram 20 and slide 10 are in direct contact and wear occurs. In addition, the soft strip can absorb the noise of relative sliding between the slide ram 20 and slide 10, thus playing a shock-absorbing role.

[0050] refer to Figures 1 to 6 In some embodiments, the slide transmission mechanism 1 further includes a spindle box 40, which is mounted on one end of the slide 20 along a first direction. The spindle box 40 has a receiving groove 41 corresponding to the position of the mounting groove 23. The receiving groove 41 is connected to the mounting groove 23, and a portion of the fixed length 31 extends from the mounting groove 23 to the receiving groove 41.

[0051] It can be understood that the spindle box 40 is a transmission structure used to arrange the working spindle, transmission parts and corresponding auxiliary mechanisms. Its main function is to support the working spindle and make it rotate, so as to realize the functions of starting, braking, speed changing and reversing of the working spindle.

[0052] It is understandable that when the length of the fixed ruler 31 is relatively long and extends beyond the end face of the slide block 20, in order to ensure that the portion of the fixed ruler 31 protruding beyond the end face of the slide block 20 can be stably supported, the feature that the spindle box 40 is mounted on and fixed relative to the slide block 20 can be fully utilized. This portion of the fixed ruler 31 can be mounted on the spindle box 40, so that the spindle box 40 supports the fixed ruler 31. It is also understandable that at the end of the slide block 20 away from the spindle box 40, the fixed ruler 31 does not protrude beyond the end face of the slide block 20. This not only ensures the aesthetics of the structure, but also allows the end face of the slide block 20 to protect the fixed ruler 31, preventing the fixed ruler 31 from being damaged by impact when the slide block 20 slides to its limit position relative to the slide seat 10 towards the end of the slide block 20 away from the spindle box 40.

[0053] Specifically, the spindle box 40 includes a housing 42, a cover 43 connected to the housing 42, and a connecting plate 44 connected to the housing 42. The connecting plate 44 is connected to the slide 20, the housing 42 is connected to the connecting plate 44, and the cover 43 cooperates with the housing 42 to form a space for accommodating functional components. It can be understood that part of the receiving groove 41 is located on the connecting plate 44, part of the receiving groove 41 is located on the housing 42, and part of the receiving groove 41 is located on the cover 43. When machining the receiving groove 41, the connecting plate 44, the housing 42, and the cover 43 can be connected together and machined together by turning or grinding to obtain the receiving groove 41.

[0054] Combination Figures 1 to 7 As shown, specifically in this application, the mounting groove 23 has a first mounting surface 231 for mounting the ruler 31, and the receiving groove 41 has a second mounting surface 411 for mounting the ruler 31, the second mounting surface 411 being higher than the first mounting surface 231. The ram transmission mechanism 1 also includes a gasket 50, which is received in the mounting groove 23 and sandwiched between the first mounting surface 231 and the ruler 31, with the side of the gasket 50 facing away from the first mounting surface 231 flush with the second mounting surface 411.

[0055] It is understandable that simultaneously machining the receiving groove 41 and the mounting groove 23 on the spindle box 40 and the slide ram 20 to obtain a first mounting surface 231 and a second mounting surface 411 that are flush with each other would increase the machining difficulty and make the machining operation inconvenient. Therefore, the mounting groove 23 and the receiving groove 41 will be machined separately, which can reduce the machining difficulty and save costs. However, due to the combined accumulation of machining errors and assembly errors of the spindle box 40 and the slide ram 20, the first mounting surface 231 and the second mounting surface 411 will not be flush.

[0056] In this application, after the spindle box 40 is installed on the slide 20, the second mounting surface 411 is ensured to be higher than the first mounting surface 231. A shim 50 is provided in the mounting groove 23 so that one side of the shim 50 is in close contact with the first mounting surface 231. The side of the shim 50 facing away from the first mounting surface 231 can be ground until it is flush with the second mounting surface 411. Thus, after the ruler 31 is installed in the mounting groove 23 and the receiving groove 41, the shim 50 is sandwiched between the ruler 31 and the first mounting surface 231, and the side of the shim 50 facing away from the first mounting surface 231 is in close contact with the ruler 31. The second mounting surface 411 is directly in close contact with the ruler 31. The shim 50 and the second mounting surface 411 together provide a stable mounting surface for the ruler 31. In addition, since the gasket 50 is sandwiched between the fixed ruler 31 and the first mounting surface 231, the gasket 50 can play an isolation role between the fixed ruler 31 and the slide 20, so as to reduce the influence of the slide 20's own temperature on the fixed ruler 31 and further improve the detection accuracy of the grating ruler 30.

[0057] It is understood that in this application, since the mounting groove 23 is relatively long, multiple gaskets 50 can be installed within the mounting groove 23. These multiple gaskets 50 are spaced apart along the extending direction of the mounting groove 23. Thus, because each gasket 50 is relatively short, it can be more easily aligned with the second mounting surface 411, reducing the difficulty of processing. In other embodiments, multiple gaskets 50 can also be connected together to obtain a single, longer gasket 50.

[0058] Specifically, the slide transmission mechanism 1 also includes a connector (not shown) that connects the fixed ruler 31 to the first mounting surface 231. The gasket 50 has a through hole 51, through which the connector passes and is accommodated. The through hole 51 extends towards the edge of the gasket 50 to form a notch 52 through which the connector can pass. It can be understood that the connector can be a screw, bolt, or other threaded structure that can penetrate the first mounting surface 231 to lock the fixed ruler 31 and the slide 20 together, achieving a stable connection between the fixed ruler 31 and the slide 20. It can also be understood that there can be multiple connectors, spaced apart along the extension direction of the mounting groove 23, to connect the fixed ruler 31 and the slide 20 from multiple positions along the length of the fixed ruler 31.

[0059] For the gasket 50, by opening a through hole 51 on it, the connector can be connected to the slide 20 after passing through the through hole 51. In addition, when the connector is connected to the slide 20, that is, when the fixed length 31 does not need to be separated from the slide 20, the connector can be led out from the notch 52 communicating with the through hole 51 or introduced into the through hole 51 from the notch 52. This enables the quick removal and installation of the gasket 50, so as to facilitate the maintenance or replacement of the gasket 50.

[0060] In this application, considering that the longer part of the ruler 31 is located in the mounting groove 23, when the connector connects the ruler 31 to the first mounting surface 231, a protective cover plate 33 can be placed over the ruler 31, so that the protective cover plate 33 can provide better protection for the ruler 31.

[0061] Specifically, in this application, the slide transmission mechanism 1 also includes a bracket 60 installed on the spindle box 40, a receiving groove 41 extending along the first direction and penetrating the spindle box 40, and the receiving groove 41 having a first opening (not shown in the figure) near the mounting groove 23 and a second opening (not shown in the figure) away from the mounting groove 23, and the portion of the fixed length 31 exposed in the second opening is installed on the bracket 60.

[0062] It is understandable that when the length of the fixed ruler 31 is large, and the mounting groove 23 of the slide ram 20 and the receiving groove 41 of the spindle box 40 are insufficient to support the fixed ruler 31, a small part of the fixed ruler 31 will protrude from the second opening of the mounting groove 23 to the outside of the spindle box 40. At this time, the fixed ruler 31 can be supported by installing a bracket 60 on the spindle box 40 and installing the part of the fixed ruler 31 on the bracket 60.

[0063] It should be noted that the portion of the fixed ruler 31 extending beyond the spindle box 40 is relatively short, and therefore can be supported by a shorter bracket 60. Furthermore, since the bracket 60 moves synchronously with the slide ram 20 along with the spindle box 40, it does not affect the parallelism between the length direction of the fixed ruler 31 and the sliding direction of the slide ram 20. In addition, since most of the fixed ruler 31 is mounted on the slide ram 20, the overall length direction of the fixed ruler 31 maintains a high degree of parallelism with the sliding direction of the slide ram 20, thereby ensuring that the grating ruler 30 has high detection accuracy.

[0064] Specifically, in this application, the slide 20 has a hollow space 24 inside, allowing an oil pipeline (not shown) to pass through. By making the slide 20 hollow, the weight of the slide 20 can be reduced, and the smoothness of the slide 20 sliding relative to the slide rail can be improved. At the same time, the hollow space 24 inside the slide 20 can also be used to lay the oil pipeline, providing space for the installation of the oil pipeline and hiding the oil pipeline inside the slide 20, thus improving the aesthetics of the overall structure.

[0065] Combination Figures 1 to 8As shown, specifically in this application, the slide transmission mechanism 1 further includes a support 70 mounted on the slide 10, and a reading head 32 mounted on the support 70. By providing the support 70 on the slide 10 and mounting the reading head 32 on the support 70, it is easier for the reading head 32 to be aligned with the fixed ruler 31 for detection. It can be understood that the position of the support 70 is such that the reading head 32 is aligned with the fixed ruler 31.

[0066] It is understandable that the width of the mounting groove 23 is set relatively large in order to facilitate the removal or insertion of the shim 50 from the mounting groove 23. Thus, in order to make full use of the space other than that occupied by the shim 50 and the fixed ruler 31, the reading head 32 can be inserted into this space and the detection can be performed by the reading head 32 cooperating with the side of the fixed ruler 31.

[0067] In this application, the slide transmission mechanism 1 includes a drive assembly 80, which includes a motor 81, a lead screw (not shown), and a slider (not shown). The output shaft of the motor 81 is connected to one end of the lead screw. The slider is sleeved on the lead screw and threadedly engaged with it. The slider is fixedly connected to the slide 20. The output shaft of the motor 81 rotates to drive the lead screw to rotate, thereby causing the slider to drive the slide 20 to translate along the axial direction of the lead screw, thus realizing the sliding of the slide 20 relative to the slide block 10. It can be understood that the axial direction of the lead screw is parallel to the first direction.

[0068] Furthermore, the motor 81 can be an AC servo motor, and the lead screw can be a ball screw. The drive assembly 80 may also include a reducer (not shown), which is connected between the motor 81 and the lead screw. The reducer reduces the rotational motion output by the motor 81 and outputs it to the lead screw, thereby realizing the low-speed sliding of the ram 20 relative to the slide block 10. Specifically, the reducer can be a low-backlash reducer.

[0069] Specifically, for the installation of the lead screw, the drive assembly 80 also includes a mounting base 82 fixedly mounted on the slide 10. The lead screw is housed inside the mounting base 82, and bearings are sleeved at both ends of the lead screw, which are connected to the mounting base 82 through the bearings. In addition, both ends of the lead screw are pre-stretched to compensate for the change in length of the lead screw due to temperature changes.

[0070] In this application, there are two drive components 80, which are located on opposite sides of the slide 20 to provide a relatively stable driving force for the slide 20.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A ram transmission mechanism, characterized in that, include: Slide; A ram is slidably connected to the slide block along a first direction, and the slide block is sleeved around the ram; the outer wall surface of the ram includes a mating surface that is in close contact with the inner wall surface of the slide block and a non-matting surface that does not contact the inner wall surface of the slide block; and An optical grating ruler includes a fixed ruler and a reading head. The fixed ruler extends in a long strip along the first direction and is mounted on the non-mating surface. The reading head is mounted on the slide. The non-mating surface is recessed into the interior of the slide block relative to the mating surface to form a mounting groove, the mounting groove extends along the first direction, and the fixed length is received in the mounting groove; The slide transmission mechanism further includes a spindle box, which is installed at one end of the slide along the first direction; the spindle box has a receiving groove corresponding to the position of the mounting groove, the receiving groove is connected to the mounting groove, and part of the fixed length extends from the mounting groove to the receiving groove; The mounting groove has a first mounting surface for mounting the fixed ruler, and the receiving groove has a second mounting surface for mounting the fixed ruler, the second mounting surface being higher than the first mounting surface; the ram transmission mechanism further includes a gasket, the gasket being received in the mounting groove and sandwiched between the first mounting surface and the fixed ruler, the side of the gasket facing away from the first mounting surface being flush with the second mounting surface.

2. The slide transmission mechanism according to claim 1, characterized in that, There are multiple mating surfaces, which are arranged sequentially along the circumference of the slide block. The inner wall surface of the slide block is in surface-to-surface contact with the multiple mating surfaces to limit the sliding direction of the slide block to the first direction. At least one of the multiple mating surfaces has the mounting groove formed on it.

3. The slide transmission mechanism according to claim 1, characterized in that, The slide transmission mechanism further includes a connector that connects the fixed length to the first mounting surface; the gasket has a through hole, the connector passes through the gasket and is accommodated in the through hole; the through hole extends to the edge of the gasket to form a notch through which the connector can pass.

4. The slide transmission mechanism according to claim 1, characterized in that, The slide transmission mechanism further includes a bracket mounted on the spindle box; the receiving groove extends along the first direction and penetrates the spindle box, and the receiving groove has a first opening near the mounting groove and a second opening away from the mounting groove, with the portion of the fixed length exposed in the second opening mounted on the bracket.

5. The slide transmission mechanism according to claim 1, characterized in that, The slide block has a hollow space inside that allows oil pipelines to pass through.

6. The slide transmission mechanism according to any one of claims 1 to 5, characterized in that, The slide transmission mechanism also includes a support mounted on the slide, and the reading head is mounted on the support.

7. A CNC machine tool, characterized in that, Includes the slide transmission mechanism as described in any one of claims 1 to 5.

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