Bridge plate supporting device and numerical control machine tool

Abstract

The utility model provides a bridge plate supporting device and a numerical control machine tool, and belongs to the field of machine tools. The bridge plate supporting device comprises a base used for being fixedly installed on a machine tool underframe and a follower used for being fixedly connected with a bridge plate, the follower is provided with an arc-shaped rolling matching face, the base is provided with at least two installation bases, and rolling supporting bodies in rolling fit with the rolling matching face are rotationally installed on the installation bases. The mounting base is assembled on the base in a guiding and direct-moving mode in the direction perpendicular to the rotating axis of the rolling supporting body, and a locking structure used for unlocking when the position of the mounting base is adjusted and locking the mounting base and the base after the position of the mounting base is adjusted is arranged between the mounting base and the base. The numerical control machine tool comprises the bridge plate and the bridge plate supporting device. According to the bridge plate supporting device, the original rolling supporting body with the fixed position is changed into the rolling supporting body with the adjustable position, and the control precision of the planeness of the bridge plate can be effectively improved on the premise that the machining precision of the bridge plate supporting device is not changed.

Description

Technical Field

[0001] The utility model belongs to the field of machine tools, in particular to a bridge plate supporting device and a numerically controlled machine tool. Background Art

[0002] When machining workpieces on large four- or five-axis CNC machines, the workpieces are clamped onto the machine's bridge. Excessively long bridges can reduce machining accuracy because they lack rigidity, causing the middle portion of the bridge to sag due to gravity, resulting in bending and deformation, which in turn reduces the bridge's flatness.

[0003] The existing Chinese utility model patent with authorization announcement number CN215699731U and authorization announcement date of February 1, 2022 discloses a long-stroke, heavy-duty four-axis rotation mechanism, which includes a bridge plate and multiple arc blocks (i.e., followers) arranged at the bottom of the bridge plate. A support mechanism is provided under each arc block. The support mechanism includes a base (i.e., a pedestal), a mounting seat arranged above the base, and a roller (i.e., a rolling support body) rotatably arranged on the mounting seat. The arc block is placed on the roller, and the roller provides support for the arc block to prevent the bridge plate from being deformed due to gravity; when the bridge plate rotates, the arc block can cooperate with the roller to roll, so as not to affect the normal operation of the bridge plate.

[0004] To achieve the required flatness of the bridge deck, the distance between the rotation center of each rolling support and the gyration center of the bridge deck must be within a certain range, which places high demands on the installation position of the rolling support. In actual use, due to manufacturing errors in the support mechanism and assembly errors of its components, the installation position of the rolling support cannot meet the required requirements. As a result, the above-mentioned support mechanism cannot effectively solve the problem of poor top surface flatness caused by sagging in the middle of the bridge deck. Utility Model Content

[0005] One of the purposes of the present invention is to provide a bridge plate supporting device to solve the technical problem in the prior art that the rolling support body of the bridge plate supporting device is difficult to be assembled to a suitable position, resulting in the bridge plate's flatness failing to meet the requirements.

[0006] One of the purposes of the present invention is to provide a CNC machine tool to solve the above technical problems.

[0007] To achieve the above objectives, the technical solution of the bridge deck support device provided by the present invention is:

[0008] A bridge plate support device includes a base for fixedly mounting on a machine tool chassis and a follower for fixedly connecting to the bridge plate, the follower is provided with an arc-shaped rolling mating surface, at least two mounting seats are provided on the base, a rolling support body for rolling mating with the rolling mating surface is rotatably mounted on the mounting seat, the mounting seat is guided and linearly assembled on the base along a direction perpendicular to the rotation axis of the rolling support body, and a locking structure is provided between the mounting seat and the base for releasing the lock when adjusting the position of the mounting seat and locking the mounting seat and the base after the position of the mounting seat is adjusted.

[0009] As a further improvement, the rolling support body includes a pair of bottom side rolling support bodies, and the mounting seat corresponding to each bottom side rolling support body is a bottom side mounting seat. A bottom side adjustment mechanism is provided between the two bottom side mounting seats for driving the bottom side mounting seat to move horizontally to change the distance between the two bottom side mounting seats.

[0010] As a further improvement, a bottom side adjustment screw is provided between the two bottom side mounting seats. The two ends of the bottom side adjustment screw are respectively engaged with the threads of the two bottom side mounting seats and the thread rotation directions are opposite. When one of the bottom side mounting seats is adjusted in position, the other bottom side mounting seat is locked with the base through a locking structure, and the bottom side adjustment screw constitutes a bottom side adjustment mechanism.

[0011] As a further improvement, a long hole is provided on the bottom mounting seat, and the length direction of the long hole is in the same direction as the linear motion direction of the bottom mounting seat. The locking structure includes a bottom locking bolt that passes through the long hole and cooperates with the base thread. The bottom locking bolt has an unlocked state in which the lock is released after being loosened, and a locked state in which the bottom mounting seat and the base are locked after being tightened.

[0012] As a further improvement, the rolling support body includes at least one pair of inclined side rolling support bodies, and the mounting seat corresponding to each inclined side rolling support body is an inclined side mounting seat. The base includes two mating inclined surfaces arranged in a V shape, and the inclined side mounting seats corresponding to a pair of inclined side rolling support bodies are respectively guided and installed on the two mating inclined surfaces. Each inclined side mounting seat is equipped with an inclined side adjustment mechanism for driving the inclined side mounting seat to tilt and move.

[0013] As a further improvement, the bevel adjustment mechanism includes a bevel fixing seat and a bevel adjustment screw. The bevel fixing seat is fixedly mounted on the mating bevel surface. The bevel adjustment screw is threadedly mated with the bevel fixing seat and the bevel mounting seat, and the mating threads have opposite rotation directions.

[0014] As a further improvement, a long hole is provided on the oblique side mounting seat, and the length direction of the long hole is in the same direction as the linear motion direction of the oblique side mounting seat. The locking structure includes an oblique side locking bolt that passes through the long hole and cooperates with the base thread. The oblique side locking bolt has an unlocked state when it is loosened and a locked state when it is tightened to lock the oblique side mounting seat and the base.

[0015] As a further improvement, chip-blocking flanges are fixed or integrally connected on both sides of the follower in the direction of the rotation axis, and the two chip-blocking flanges and the rolling matching surface form a guide groove for the rolling support body to be embedded.

[0016] As a further improvement, at least one limiting member is fixedly provided on the follower, and when the follower rotates to a rotation limit position, the corresponding limiting member and the corresponding rolling support body are blocked and engaged.

[0017] The beneficial effect is that the bridge deck support device provided by the present invention is an invention that changes the relationship between elements. Compared with the existing technology, the bridge deck support device replaces the originally fixed rolling support body with an adjustable rolling support body. The position of the rolling support body is adjusted by adjusting the position of the mounting seat, so that the rolling support body moves linearly perpendicular to the rotation axis of the rolling support body. This can change the support position of the rolling support body on the follower and change the height of the follower. Therefore, without changing the processing accuracy of the bridge deck support device, the control accuracy of the bridge deck flatness is effectively improved.

[0018] To achieve the above-mentioned purpose, the technical solution of the CNC machine tool provided by the present utility model is:

[0019] A CNC machine tool includes a machine tool base and a bridge plate located above the machine tool base, and also includes a bridge plate support device. The bridge plate support device includes a base for being fixedly mounted on the machine tool base and a follower for being fixedly connected to the bridge plate. The follower is provided with an arc-shaped rolling mating surface. At least two mounting seats are provided on the base. A rolling support body that rolls with the rolling mating surface is rotatably mounted on the mounting seat. The mounting seat is guided and linearly assembled on the base along a direction perpendicular to the rotation axis of the rolling support body. A locking structure is provided between the mounting seat and the base for releasing the lock when adjusting the position of the mounting seat and locking the mounting seat and the base after the position of the mounting seat is adjusted.

[0020] As a further improvement, the rolling support body includes a pair of bottom side rolling support bodies, and the mounting seat corresponding to each bottom side rolling support body is a bottom side mounting seat. A bottom side adjustment mechanism is provided between the two bottom side mounting seats for driving the bottom side mounting seat to move horizontally to change the distance between the two bottom side mounting seats.

[0021] As a further improvement, a bottom side adjustment screw is provided between the two bottom side mounting seats. The two ends of the bottom side adjustment screw are respectively engaged with the threads of the two bottom side mounting seats and the thread rotation directions are opposite. When one of the bottom side mounting seats is adjusted in position, the other bottom side mounting seat is locked with the base through a locking structure, and the bottom side adjustment screw constitutes a bottom side adjustment mechanism.

[0022] As a further improvement, a long hole is provided on the bottom mounting seat, and the length direction of the long hole is in the same direction as the linear motion direction of the bottom mounting seat. The locking structure includes a bottom locking bolt that passes through the long hole and cooperates with the base thread. The bottom locking bolt has an unlocked state in which the lock is released after being loosened, and a locked state in which the bottom mounting seat and the base are locked after being tightened.

[0023] As a further improvement, the rolling support body includes at least one pair of inclined side rolling support bodies, and the mounting seat corresponding to each inclined side rolling support body is an inclined side mounting seat. The base includes two mating inclined surfaces arranged in a V shape, and the inclined side mounting seats corresponding to a pair of inclined side rolling support bodies are respectively guided and installed on the two mating inclined surfaces. Each inclined side mounting seat is equipped with an inclined side adjustment mechanism for driving the inclined side mounting seat to tilt and move.

[0024] As a further improvement, the bevel adjustment mechanism includes a bevel fixing seat and a bevel adjustment screw. The bevel fixing seat is fixedly mounted on the mating bevel surface. The bevel adjustment screw is threadedly mated with the bevel fixing seat and the bevel mounting seat, and the mating threads have opposite rotation directions.

[0025] As a further improvement, a long hole is provided on the oblique side mounting seat, and the length direction of the long hole is in the same direction as the linear motion direction of the oblique side mounting seat. The locking structure includes an oblique side locking bolt that passes through the long hole and cooperates with the base thread. The oblique side locking bolt has an unlocked state when it is loosened and a locked state when it is tightened to lock the oblique side mounting seat and the base.

[0026] As a further improvement, chip-blocking flanges are fixed or integrally connected on both sides of the follower in the direction of the rotation axis, and the two chip-blocking flanges and the rolling matching surface form a guide groove for the rolling support body to be embedded.

[0027] As a further improvement, at least one limiting member is fixedly provided on the follower, and when the follower rotates to a rotation limit position, the corresponding limiting member and the corresponding rolling support body are blocked and engaged.

[0028] The beneficial effect is that the CNC machine tool provided by the present invention is an invention that changes the relationship between elements. Compared with the existing technology, the bridge plate support device in this CNC machine tool replaces the originally fixed rolling support body with an adjustable rolling support body. The position of the rolling support body is adjusted by adjusting the position of the mounting seat, so that the rolling support body moves linearly perpendicular to the rotation axis of the rolling support body. This can change the support position of the rolling support body on the follower and change the height of the follower. Therefore, without changing the processing accuracy of the bridge plate support device, the control accuracy of the bridge plate flatness is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the CNC machine tool in the present utility model;

[0030] Figure 2 This is a structural diagram of a bridge plate supporting device in one embodiment of a CNC machine tool in the present utility model;

[0031] Figure 3 This is a cross-sectional view of a bridge plate support device in one embodiment of a CNC machine tool in the present utility model.

[0032] Description of reference numerals:

[0033] 1. Machine tool base; 2. Four-axis tailstock; 3. Four-axis turntable; 4. Bridge plate; 41. Clamping surface; 5. Base; 51. Bottom base; 52. Oblique base; 6. Follower; 61. Rolling mating surface; 62. Connecting groove; 63. Connecting hole; 7. Adjusting pad; 8. Bottom rolling support; 9. Oblique rolling support; 10. Bottom mounting seat; 11. Bottom adjusting screw; 12. Locking bolt; 13. Long hole; 14. Oblique mounting seat; 15. Oblique fixing seat; 16. Oblique adjusting screw; 17. Chip stop flange; 18. Limiting piece. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the embodiments.

[0035] In order to solve the problems in the existing technology, the basic concept of the present invention is to set the rolling support body that was originally fixed in position to a rolling support body with adjustable position, which can effectively improve the control accuracy of the bridge plate flatness without changing the processing accuracy of the bridge plate support device.

[0036] Specific embodiment 1 of the CNC machine tool provided by the utility model:

[0037] A CNC machine tool, see attached Figure 1 The machine tool comprises a base frame 1, a four-axis tailstock 2 and a four-axis turntable 3 mounted above the base frame 1, and a bridge plate 4 is provided between the four-axis tailstock 2 and the four-axis turntable 3 for transmission. The bridge plate 4 is located above the base frame 1 and can rotate under the drive of the four-axis tailstock 2. One side surface of the bridge plate 4 is a clamping surface 41 for clamping a workpiece.

[0038] A bridge plate supporting device is provided above the machine tool base frame 1 and is located at the center position of the bridge plate 4 in the length direction.

[0039] See attached Figure 2 and attached Figure 3 The bridge plate supporting device includes a base 5 and a follower 6, wherein the base 5 is fixedly mounted on the machine tool chassis 1 by means of bolt connection, and the follower 6 is fixedly mounted on the bridge plate 4 by means of bolt connection.

[0040] The follower 6 is specifically a semicircular plate, whose curved sidewalls form a rolling mating surface 61. A connecting groove 62 is defined in the follower 6. During use, the three sides of the bridge plate 4, excluding the clamping surface 41, are embedded in the connecting groove 62. Specifically, the side of the bridge plate 4 facing away from the clamping surface 41 corresponds to the bottom wall of the connecting groove 62, and the two sides of the bridge plate 4 adjacent to the clamping surface 41 correspond to the sidewalls of the connecting groove 62. After assembly, no part of the follower 6 protrudes beyond the clamping surface 41.

[0041] Both sides of the follower 6 are provided with connecting holes 63 for the bolts to pass through. The axis of the connecting hole 63 is perpendicular to and connected to the corresponding groove side wall of the connecting groove 62. Threaded holes corresponding to the connecting holes 63 are provided on the two side surfaces of the bridge plate 4 connected to the clamping surface 41. After the bolts are passed through the connecting holes 63 and threadedly connected to the corresponding threaded holes, the follower 6 and the bridge plate 4 can be fixed together.

[0042] After the follower 6 is installed, the center of curvature of the curved edge of the follower 6 is aligned with the central axis of the bridge plate 4, with a deviation within 0.015 mm. Specifically, removable adjustment pads 7 are provided on the sidewalls and bottom wall of the connecting groove 62 for adjusting the relative position of the follower 6 and the bridge plate 4. These adjustment pads 7 are provided with through-holes for bolts to pass through. The adjustment pads 7 located on the bottom wall of the connecting groove 62 are fixed to the bottom wall via bolts, while the adjustment pads 7 located on the sidewalls of the connecting groove 62 are sandwiched between the sidewalls and the side of the bridge plate 4, with the bolts passing through them. During installation, the adjustment pads 7 can be ground to ensure installation accuracy, ensuring that the deviation between the center of curvature of the outer circle of the mating portion and the central axis of the bridge plate 4 meets the requirements.

[0043] The base 5 includes a bottom base 5 and oblique side bases 5 located on the left and right sides of the bottom base 5. In the present invention, the direction perpendicular to the axis of rotation of the bridge deck 4 and located on the horizontal plane is the left and right direction. The bottom base 5 is located directly below the bridge deck 4, and the oblique side bases 5 are located obliquely below the bridge deck 4.

[0044] Both the bottom base 5 and the oblique base 5 are equipped with mounting seats, each of which is rotatably provided with a rolling support body. The rolling support body can be a roller or a bearing. The mounting seat on the bottom base 5 is the bottom mounting seat 10, and the rolling support body on the bottom base 5 is the bottom rolling support body 8. The mounting seat on the oblique base 5 is the oblique mounting seat, and the rolling support body on the oblique base 5 is the oblique rolling support body 9. The bottom mounting seat 10 is equipped with a bottom adjustment mechanism for driving its horizontal movement perpendicular to the axis of rotation of the rolling support body, while the oblique mounting seat is equipped with an oblique adjustment mechanism for driving its tilting movement perpendicular to the axis of rotation of the rolling support body.

[0045] A pair of bottom mounting seats 10 are provided, which guide and slide with the top of the bottom base 5. To improve the reliability of the movement of the bottom mounting seats 10, both the bottom mounting seats 10 and the bottom base 5 are provided with slots. The slots on the bottom base 5 are provided with guide keys, and the slots of the bottom mounting seats 10 are guided and engaged with the guide keys. Two bottom rolling supports 8 are provided, and are rotatably mounted on the two bottom mounting seats 10. Moving the bottom mounting seats 10 can change the position of the bottom rolling supports 8.

[0046] A bottom adjustment screw 11 is disposed between the two bottom mounting blocks 10. A hexagonal wrench structure is formed in the middle of the bottom adjustment screw 11. Threads are formed at both ends of the bottom adjustment screw 11, with the threads rotating in opposite directions. Threaded holes are formed in both bottom mounting blocks 10, and the threads at both ends of the bottom adjustment screw 11 mate with the threaded holes in the two bottom mounting blocks 10. In this embodiment, the bottom adjustment screw 11 constitutes a bottom adjustment mechanism for adjusting the position of the bottom mounting blocks 10.

[0047] A locking structure is provided between the two bottom side mounting seats 10 and the bottom side base 5. Specifically, the locking structure includes a locking bolt 12. A long hole 13 is provided on the bottom side mounting seat 10. The length direction of the long hole 13 is in the same direction as the sliding direction of the bottom side mounting seat 10. The locking bolt 12 passes through the long hole 13 and is threadedly connected to the bottom side base 5. After tightening the locking bolt 12, the bottom side mounting seat 10 is locked to the base 5. The locking bolt 12 has an unlocked state in which the lock is released after being loosened and a locked state in which the mounting seat and the base 5 are locked after being tightened.

[0048] During use, when the position of one of the bottom mounting seats 10 needs to be adjusted, the locking bolt 12 on the bottom mounting seat 10 is loosened, while the other bottom mounting seat 10 remains fixed. The operator rotates the bottom adjusting screw 11 to move the corresponding bottom mounting seat 10.

[0049] A pair of oblique side mounting seats 14 are provided, and the two oblique side mounting seats 14 are respectively located on both sides of the oblique lower side of the follower 6. A matching oblique surface is provided on the top of the oblique side base 5. The oblique side mounting seat 14 slides with the matching oblique surface. The oblique side fixing seat 15 is fixed on the matching oblique surface by bolts. A guide key is also provided between the oblique side mounting seat 14 and the oblique side base 5. The specific structure will not be repeated here.

[0050] A bevel adjustment screw 16 is disposed between the bevel mounting seat 14 and the bevel fixing seat 15. A hexagonal wrench structure is formed in the middle of the bevel adjustment screw 16. Both ends of the bevel adjustment screw 16 are threaded, with the threads rotating in opposite directions. Both the bevel mounting seat 14 and the bevel fixing seat 15 are formed with threaded holes, and the threads at both ends of the bevel adjustment screw 16 mate with the threaded holes in the bevel mounting seat 14 and the bevel fixing seat 15, respectively. A locking structure, also in the form of a locking bolt 12, is also disposed between the bevel mounting seat 14 and the bevel base 5. The locking bolt 12 corresponding to the bevel mounting seat 14 is the bevel locking bolt, while the locking bolt 12 corresponding to the bottom mounting seat 10 is the bottom locking bolt. When adjusting the position of the oblique rolling support 9, the operator loosens the locking bolt 12 on the corresponding oblique mounting seat 14 and then rotates the corresponding oblique adjustment screw 16 to move the oblique mounting seat 14. After the adjustment is completed, the locking bolt 12 is re-tightened. In this embodiment, the oblique adjustment screw 16 and the oblique fixing seat 15 constitute the oblique adjustment mechanism.

[0051] The bottom side rolling support body 8 plays a major supporting role, and the oblique side rolling support body 9 plays an auxiliary supporting role, and provides horizontal constraints for the follower 6, thereby improving the rotation stability of the follower 6.

[0052] During the initial installation of the bridge deck 4, the center of the bridge deck 4 may sag. Adjusting the position of the rolling support body will help support the center of the bridge deck 4 and improve the flatness of the clamping surface 41 of the bridge deck 4. The position of the rolling support body is adjusted using adjustment mechanisms, specifically bottom-side and diagonal adjustment mechanisms. The adjustment process primarily changes the distance between the rolling support body's rotational center and the bridge deck 4's gyration center to adjust the height of the follower 6, and thus the center of the bridge deck 4.

[0053] The specific adjustment method is to first horizontalize the clamping surface 41 of the bridge plate 4. Then, the adjustment mechanism is used to change the contact points between each rolling support and the follower 6, using the rolling support to support the center of the bridge plate 4, so that the flatness of the clamping surface 41 of the bridge plate 4 is less than or equal to 0.02 mm. The bridge plate 4 is then rotated 45° and the flatness of the bridge plate 4 is measured again, ensuring that the flatness of the clamping surface 41 of the bridge plate 4 is still less than 0.02 mm at the 45° angle.

[0054] Compared with the existing technology, the bridge plate support device in this CNC machine tool changes the rolling support body that was originally fixed in position into a rolling support body with adjustable position, and uses an adjustment mechanism to adjust the position of the rolling support body. It can effectively improve the control accuracy of the flatness of the bridge plate 4 without changing the processing accuracy of the bridge plate support device.

[0055] In the above embodiment, the follower is a semicircular plate, which can facilitate the processing and manufacturing of the follower. In other embodiments, the follower can also be a frame structure, with an arc-shaped strip plate arranged on the periphery of the frame structure, and the rolling mating surface is the outer peripheral surface of the arc-shaped strip plate.

[0056] Specific embodiment 2 of the numerically controlled machine tool provided by the utility model:

[0057] This embodiment is based on the embodiment 1, and is different from the embodiment 1 in that only a bottom-side rolling support body is provided in this embodiment, and no oblique-side rolling support body is provided.

[0058] Specific embodiment 3 of the CNC machine tool provided by the utility model:

[0059] This embodiment is based on Example 1, and differs from Example 1 in that the bottom side adjustment mechanisms corresponding to the two bottom side rolling support bodies in this embodiment are each provided with an independent bottom side fixing seat, which is similar to the structure of the oblique side adjustment mechanism and will not be repeated.

[0060] In other implementations of this embodiment, each bottom-side rolling support body is located on an independent base.

[0061] Specific embodiment 4 of the numerically controlled machine tool provided by the utility model:

[0062] This embodiment is based on embodiment 1, and differs from embodiment 1 in that only the oblique side rolling support body is provided in this embodiment, and no bottom side rolling support body is provided.

[0063] Specific embodiment 5 of the numerically controlled machine tool provided by the utility model:

[0064] This embodiment is based on embodiment 1, and differs from embodiment 1 in that the adjustment mechanism in this embodiment is an electric push rod or a hydraulic cylinder to automatically drive the bottom side mounting seat or the oblique side mounting seat to move.

[0065] Specific embodiment 6 of the numerically controlled machine tool provided by the utility model:

[0066] This embodiment is based on embodiment 1, and differs from embodiment 1 in that this embodiment also includes a rolling support body that can move up and down, and the mounting seat of the rolling support body that can move up and down is also equipped with an adjustment mechanism, which is a scissors-type lifting mechanism.

[0067] Specific embodiment 7 of the numerically controlled machine tool provided by the utility model:

[0068] This embodiment is based on Example 1, and differs from Example 1 in that chip-blocking flanges 17 for limiting the rolling support body are fixed or integrally connected on both sides of the rolling mating surface 61 in the direction of the rotation axis of the follower 6, and the two chip-blocking flanges 17 and the rolling mating surface 61 form a guide groove for guiding the rolling support body. In one embodiment of this embodiment, the chip-blocking flange 17 is a chip-blocking plate fixedly mounted on the follower 6 by bolts. In another embodiment of this embodiment, the chip-blocking flange 17 can also be integrally formed on the follower 6 by welding. The chip-blocking flange 17 can prevent metal chips generated during machining from falling onto the rolling support body and affecting the normal rotation of the rolling support body, or affecting the rolling fit between the rolling support body and the rolling mating surface 61. At the same time, the guide groove formed by the chip-blocking flange 17 and the rolling mating surface 61 can also ensure the rolling stability of the rolling support body and the rolling mating surface 61. In other embodiments, the chip-blocking flange 17 may not be provided.

[0069] Specific embodiment 8 of the numerically controlled machine tool provided by the utility model:

[0070] This embodiment is based on Example 1 and differs from Example 1 in that a limit member 18 is fixedly provided on the follower 6. The limit member 18 is specifically a limit plate fixedly mounted on the follower 6 by bolts. Two or one limit member 18 can be provided. The follower 6 has two limit positions in the forward and reverse rotation directions. When two limit members 18 are provided, the two limit members 18 correspond to the two limit positions of the follower 6 respectively; when one limit member 18 is provided, the limit member 18 corresponds to one of the limit positions of the follower 6. When the follower 6 rotates to one of the limit positions, the corresponding limit member 18 engages with the corresponding rolling support body to stop it, thereby preventing the follower 6 and the bridge plate 4 from excessive rotation.

[0071] Specific embodiments of the bridge deck support device provided by the utility model:

[0072] The bridge plate supporting device is the bridge plate supporting device in any one of the specific embodiments 1-8 of the above-mentioned CNC machine tool, and will not be described in detail here.

[0073] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bridge deck support device, characterized in that: It includes a base for fixed installation on the machine tool chassis and a follower for fixedly connected to the bridge plate, the follower is provided with an arc-shaped rolling mating surface, at least two mounting seats are provided on the base, a rolling support body for rolling cooperation with the rolling mating surface is rotatably installed on the mounting seat, the mounting seat is guided and linearly assembled on the base along a direction perpendicular to the rotation axis of the rolling support body, and a locking structure is provided between the mounting seat and the base for releasing the lock when adjusting the position of the mounting seat and locking the mounting seat and the base after the position of the mounting seat is adjusted.

2. The bridge deck supporting device according to claim 1, characterized in that: The rolling support body includes a pair of bottom side rolling support bodies, and the mounting seat corresponding to each bottom side rolling support body is a bottom side mounting seat. A bottom side adjustment mechanism is provided between the two bottom side mounting seats for driving the bottom side mounting seat to move horizontally to change the distance between the two bottom side mounting seats.

3. The bridge deck supporting device according to claim 2, characterized in that: A bottom side adjusting screw is arranged between the two bottom side mounting seats. The two ends of the bottom side adjusting screw are respectively matched with the threads of the two bottom side mounting seats and the thread rotation directions are opposite. When one of the bottom side mounting seats is adjusted in position, the other bottom side mounting seat is locked with the base through a locking structure. The bottom side adjusting screw constitutes a bottom side adjustment mechanism.

4. The bridge deck supporting device according to claim 3, characterized in that: A long hole is provided on the bottom mounting seat, and the length direction of the long hole is in the same direction as the linear direction of the bottom mounting seat. The locking structure includes a bottom locking bolt that passes through the long hole and cooperates with the base thread. The bottom locking bolt has an unlocked state in which the lock is released after being loosened, and a locked state in which the bottom mounting seat and the base are locked after being tightened.

5. The bridge deck supporting device according to any one of claims 1 to 4, characterized in that: The rolling support body includes at least one pair of inclined side rolling support bodies, and the mounting seat corresponding to each inclined side rolling support body is an inclined side mounting seat. The base includes two matching inclined surfaces arranged in a V shape. The inclined side mounting seats corresponding to a pair of inclined side rolling support bodies are respectively guided and installed on the two matching inclined surfaces. Each inclined side mounting seat is equipped with an inclined side adjustment mechanism for driving the inclined side mounting seat to tilt and move.

6. The bridge deck supporting device according to claim 5, characterized in that: The oblique side adjustment mechanism includes an oblique side fixing seat and an oblique side adjustment screw. The oblique side fixing seat is fixedly installed on the matching oblique surface. The oblique side adjustment screw is threadedly matched with the oblique side fixing seat and the oblique side mounting seat, and the matching threads have opposite rotation directions.

7. The bridge deck supporting device according to claim 6, characterized in that: A long hole is provided on the oblique side mounting seat, and the length direction of the long hole is in the same direction as the linear moving direction of the oblique side mounting seat. The locking structure includes an oblique side locking bolt that passes through the long hole and cooperates with the base thread. The oblique side locking bolt has an unlocked state in which the lock is released after being loosened, and a locked state in which the oblique side mounting seat and the base are locked after being tightened.

8. The bridge deck support device according to any one of claims 1 to 4, characterized in that Chip-blocking flanges are fixed or integrally connected to both sides of the moving part in the direction of the rotary axis, and the two chip-blocking flanges and the rolling matching surface form a guide groove for the rolling support body to be embedded.

9. The bridge deck supporting device according to any one of claims 1 to 4, characterized in that: At least one limiting member is fixedly provided on the follower. When the follower rotates to a rotation limit position, the corresponding limiting member is engaged with the corresponding rolling support body for blocking.

10. A CNC machine tool comprising a machine tool base frame and a bridge plate located above the machine tool base frame, characterized in that: It also includes the bridge deck supporting device according to any one of claims 1-9.

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