Vertical feeding mechanism of machine tool

Abstract

The utility model relates to the field of machining equipment, and discloses a vertical feeding mechanism of a machine tool, which comprises a bottom plate, a motor fixed on the bottom plate, a shell fixed on the bottom plate, the motor and the shell positioned on the same side of the bottom plate, a worm rotatably mounted in the shell, and a power input end of the worm connected with a power output end of the motor. A transmission shaft is further rotationally installed in the shell, a worm gear meshed with the worm is installed at the power input end of the transmission shaft, and a coupler is installed at the power output end of the transmission shaft and used for being connected with a vertical feed ball screw of a machine tool. The utility model has the beneficial effects that the lifting of the machine head of the machine tool is controlled by the ball screw, the transmission is stable, the response is fast, the precision is high, the abrasion is small, the worm gear and the worm are used as a transmission device for connecting the motor and the ball screw, the transmission ratio of the motor is improved, and the transmission device receives larger torque during operation; the bearing value of the motor is reduced from an overload value to an overload value divided by a reduction ratio, so that the motor can be effectively protected.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing equipment, in particular to a vertical feeding mechanism of a machine tool. Background Art

[0002] CNC grinding machines are machine tools that use abrasive tools to grind the surface of workpieces. Most grinders use high-speed rotating grinding wheels for grinding, while a few use other grinding tools such as oilstones and abrasive belts and free abrasives for processing, such as honing machines, superfinishing machines, belt grinders, grinders and polishers. CNC grinding machines include CNC surface grinders, CNC centerless grinders, CNC internal and external cylindrical grinders, CNC vertical universal grinders, CNC coordinate grinders, CNC forming grinders, etc.

[0003] Chinese utility model patent (authorization announcement number: CN207915193U name: a grinding machine) Since the teeth of the two racks are on the same horizontal plane and do not mesh with each other, and the left gear and the right gear are staggered by a tooth spacing, and mesh with the two racks respectively, so that whether the servo motor controls the feed or the retracting, it can directly respond and operate. For example, when feeding, the transmission through the meshing of the left gear and the rack can directly drive the grinding head to move down. When the tool needs to be retracted, the transmission through the meshing of the right gear and the rack can directly drive the grinding head to move up, realizing gapless transmission. Compared with the existing technology, it can overcome the problem of reduced processing accuracy caused by the existence of transmission gap in the existing technology. However, the structure of the gear and the rack meshing for transmission is prone to tooth jamming, which makes the transmission unstable, the gear wears quickly, and the operation is also laborious. Utility Model Content

[0004] The utility model aims to provide a vertical feeding mechanism for a machine tool to overcome the shortcomings of the prior art.

[0005] The purpose of the utility model is achieved through the following technical solutions: a vertical feed mechanism of a machine tool comprises a base plate, a motor is fixed on the base plate, a shell is fixed on the base plate, the motor and the shell are located on the same side of the base plate, a worm is rotatably installed in the shell, the power input end of the worm is connected to the power output end of the motor, a transmission shaft is also rotatably installed in the shell, a worm wheel meshing with the worm is installed at the power input end of the transmission shaft, a coupling is installed at the power output end of the transmission shaft, and the coupling is used to connect the vertical feed ball screw of the machine tool.

[0006] Preferably, an eccentric sleeve is sleeved on the transmission shaft, and an A bearing is installed in the eccentric sleeve. The transmission shaft is rotatably installed in the eccentric sleeve through the A bearing. A fixing ring is integrally formed on the outer wall of the eccentric sleeve, and an elongated arc hole is opened on the fixing ring. There are three elongated arc holes and they are evenly distributed around the axis of the fixing ring. A bolt is installed in the elongated arc hole, and the A bolt is used to fix the eccentric sleeve in the housing.

[0007] Preferably, the transmission shaft is also covered with a threaded cover, which is screwed onto the housing to cover the A bearing, and a felt ring is embedded in the threaded cover.

[0008] Preferably, a small synchronous pulley is installed on the rotating shaft of the motor, a large synchronous pulley is installed on the power input end of the worm, the small synchronous pulley and the large synchronous pulley are linked by a belt, and a retaining ring is installed on the rotating shaft of the motor and the worm, and the retaining ring is used to prevent the small synchronous pulley and the large synchronous pulley from loosening.

[0009] Preferably, the motor is fixed to the base plate by means of a B bolt, and an oblong through hole A and an oblong through hole B are provided on the base plate, the oblong through hole A and the oblong through hole B are parallel to each other, the B bolt passes through the oblong through hole A, and the rotating shaft of the motor passes through the oblong through hole B.

[0010] Preferably, an adjustment support is fixed on the bottom plate, the adjustment support is located between the motor and the housing, an adjustment screw is screwed on the adjustment support and pressed against the motor, and the motor is moved away from the housing by screwing the adjustment screw.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The lifting and lowering of the machine tool head is controlled by the ball screw, and the transmission is smooth, responsive, precise and with little wear. At the same time, the worm gear serves as a transmission device connecting the motor and the ball screw, which improves the transmission ratio of the motor. During operation, the transmission device accepts a larger torque. When overloaded, the motor's bearing value is reduced from the overload value to the overload divided by the reduction ratio, which can effectively protect the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0015] Figure 3 Schematic diagram of the installation structure of the worm;

[0016] Figure 4for Figure 2 A local enlarged schematic diagram of the middle A;

[0017] In the figure, 1-base plate, 2-motor, 3-housing, 4-worm, 5-drive shaft, 6-worm wheel, 7-coupling, 8-eccentric sleeve, 9-A bearing, 10-long arc hole, 11-A bolt, 12-felt ring, 13-small synchronous pulley, 14-large synchronous pulley, 15-belt, 16-retaining ring, 17-B bolt, 18-A long circular through hole, 19-adjusting support, 20-adjusting screw, 21-threaded cover. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1-3 As shown, the vertical feed mechanism of the machine tool includes a base plate 1, a motor 2 is fixed on the base plate 1, a shell 3 is fixed on the base plate 1, the motor 2 and the shell 3 are located on the same side of the base plate 1, a worm 4 is rotatably installed in the shell 3, the power input end of the worm 4 is connected to the power output end of the motor 2, a transmission shaft 5 is also rotatably installed in the shell 3, a worm wheel 6 meshing with the worm 4 is installed at the power input end of the transmission shaft 5, and a coupling 7 is installed at the power output end of the transmission shaft 5. The coupling 7 is used to connect the vertical feed ball screw of the machine tool, and the lifting and lowering of the machine head of the machine tool is controlled by the ball screw. The transmission is smooth, responsive, high in precision and low in wear. At the same time, the worm wheel 6 and the worm 4 are used as a transmission device connecting the motor 2 and the ball screw, which improves the reduction ratio of the motor 2. During operation, the transmission device accepts a larger torque. When overloaded, the bearing value of the motor 2 is reduced from the overload value to the overload value divided by the reduction ratio, which can effectively protect the motor 2.

[0025] In this embodiment, if Figure 1-3 As shown, an eccentric sleeve 8 is sleeved on the transmission shaft 5, and an A bearing 9 is installed in the eccentric sleeve 8. The transmission shaft 5 is rotatably installed in the eccentric sleeve 8 through the A bearing 9. A fixing ring is integrally formed on the outer wall of the eccentric sleeve 8. An elongated arc hole 10 is opened on the fixing ring. There are three elongated arc holes 10 and they are evenly distributed around the axis of the fixing ring. A bolt 11 is installed in the elongated arc hole 10. The A bolt 11 is used to fix the eccentric sleeve 8 in the housing 3. The center distance between the worm wheel 6 and the worm 4 can be adjusted by rotating the eccentric sleeve 8. When the worm wheel 6 and the worm 4 are worn, the center distance can be adjusted to continue to maintain the transmission accuracy and extend the service life of the machine tool.

[0026] In this embodiment, if Figure 4 As shown, the transmission shaft 5 is also covered with a threaded cover 21, which is screwed on the housing 3 to cover the A bearing 9. A felt ring 12 is embedded in the threaded cover 21 to prevent dust from entering the housing 3 and avoid wearing the worm 4.

[0027] In this embodiment, if Figure 1-3As shown, a small synchronous pulley 13 is installed on the rotating shaft of the motor 2, and a large synchronous pulley 14 is installed on the power input end of the worm 4. The small synchronous pulley 13 and the large synchronous pulley 14 are linked by a belt 15. A snap ring 16 is installed on the rotating shaft of the motor 2 and the worm 4. The snap ring 16 is used to prevent the small synchronous pulley 13 and the large synchronous pulley 14 from loosening. The structure is simple and easy to install.

[0028] In this embodiment, if Figure 1-3 As shown, the motor 2 is fixed to the base plate 1 by a B bolt 17. An oblong through hole A 18 and an oblong through hole B are provided on the base plate 1. The oblong through hole A 18 and the oblong through hole B are parallel to each other. The B bolt 17 passes through the oblong through hole A 18, and the rotating shaft of the motor 2 passes through the oblong through hole B. When the belt 15 is loose, the B bolt 17 is loosened and then the motor 2 is moved away from the housing 3. After the belt 15 is tightened, the B bolt 17 is tightened.

[0029] In this embodiment, if Figure 1-3 As shown, an adjustment support 19 is fixed on the base plate 1, and the adjustment support 19 is located between the motor 2 and the housing 3. An adjustment screw 20 is screwed on the adjustment support 19 and pressed tightly against the motor 2. The motor 2 is moved away from the housing 3 by screwing the adjustment screw 20. The motor 2 can be pushed in a direction away from the housing 3 by turning the adjustment screw 20, so that the tension of the belt 15 can be adjusted.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vertical feed mechanism for a machine tool, comprising a base plate (1), on which a motor (2) is fixed, characterized in that: A housing (3) is fixed on the base plate (1), the motor (2) and the housing (3) are located on the same side of the base plate (1), a worm (4) is rotatably mounted in the housing (3), a power input end of the worm (4) is connected to a power output end of the motor (2), a transmission shaft (5) is also rotatably mounted in the housing (3), a worm wheel (6) meshing with the worm (4) is mounted at the power input end of the transmission shaft (5), a coupling (7) is mounted at the power output end of the transmission shaft (5), and the coupling (7) is used to connect a vertical feed ball screw of the machine tool.

2. The machine tool vertical feed mechanism according to claim 1, characterized in that: An eccentric sleeve (8) is sleeved on the transmission shaft (5), and an A bearing (9) is installed in the eccentric sleeve (8). The transmission shaft (5) is rotatably installed in the eccentric sleeve (8) through the A bearing (9). A fixing ring is integrally formed on the outer wall of the eccentric sleeve (8), and an elongated arc hole (10) is opened on the fixing ring. The elongated arc holes (10) are three and are evenly distributed around the axis of the fixing ring. A bolts (11) are installed in the elongated arc holes (10), and the A bolts (11) are used to fix the eccentric sleeve (8) in the housing (3).

3. The machine tool vertical feed mechanism according to claim 2, characterized in that: The transmission shaft (5) is also covered with a threaded cover (21), which is screwed onto the housing (3) to cover the A bearing (9), and a felt ring (12) is embedded in the threaded cover (21).

4. The machine tool vertical feed mechanism according to claim 1, characterized in that: A small synchronous pulley (13) is mounted on the rotating shaft of the motor (2), a large synchronous pulley (14) is mounted on the power input end of the worm (4), the small synchronous pulley (13) and the large synchronous pulley (14) are linked via a belt (15), and a snap ring (16) is mounted on the rotating shaft of the motor (2) and the worm (4), the snap ring (16) being used to prevent the small synchronous pulley (13) and the large synchronous pulley (14) from loosening.

5. The machine tool vertical feed mechanism according to claim 1, characterized in that: The motor (2) is fixed to the base plate (1) by means of a B bolt (17); an oblong through hole A (18) and an oblong through hole B are provided on the base plate (1); the oblong through hole A (18) and the oblong through hole B are parallel to each other; the B bolt (17) passes through the oblong through hole A (18); and the rotating shaft of the motor (2) passes through the oblong through hole B.

6. The machine tool vertical feed mechanism according to claim 5, characterized in that: An adjustment support (19) is fixed on the bottom plate (1), the adjustment support (19) is located between the motor (2) and the housing (3), and an adjustment screw (20) is screwed on the adjustment support (19) and is tightly pressed against the motor (2). By screwing the adjustment screw (20), the motor (2) is moved away from the housing (3).

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