Four-axis driving module of dispensing machine

Abstract

The utility model relates to the technical field of dispensing machines, and provides a four-shaft driving module of a dispensing machine, which comprises a first shaft mechanism, a second shaft mechanism and a ball spline lead screw mechanism, the first shaft mechanism and the second shaft mechanism in the four-shaft driving module are arranged to be of a cross structure, meanwhile, the ball spline lead screw mechanism is arranged at one end of the second shaft mechanism, and compared with an existing gantry type four-shaft module, the four-shaft driving module is more compact in structure and more concise in tail end installation; and compared with an existing SCARA four-axis robot, the dispensing operation space is wider, and the dispensing operation range is larger.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing machines, in particular to a four-axis drive module of a glue dispensing machine. Background Art

[0002] Glue dispensing machines are primarily used for precisely dotting, injecting, coating, and dripping glue, paint, and other liquids onto precise locations on each product during production processes. These machines can be used to create dots, lines, circles, or arcs. The drive modules of these dispensing machines are typically driven by three- or four-axis modules, with four-axis modules often using SCARA robots or gantry-type four-axis modules like the CN210162405U. However, these existing four-axis modules are not compact enough, limiting the space available for dispensing operations and requiring improvement. Utility Model Content

[0003] In view of this, the present invention proposes a four-axis drive module for a dispensing machine, aiming to solve the problem that the four-axis module currently used in the dispensing machine is not compact enough and has limited working space.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] A four-axis drive module for a dispensing machine, comprising:

[0006] A first axis mechanism, a second axis mechanism, and a ball spline screw mechanism;

[0007] The first axis mechanism includes a base and a first slide, the first slide is connected to the base by a screw, and the first slide moves along the X-axis on the base;

[0008] The second axis mechanism is arranged on the first slide, the second axis mechanism includes a nut seat and a second slide, the second slide is connected to the nut seat with a lead screw, the second slide moves along the X-axis on the nut seat, and the second slide is arranged crosswise with the first slide;

[0009] The ball spline screw mechanism is arranged at one end of the second slide, and the ball spline screw mechanism includes a spline screw arranged to be lifted along the Z axis and rotated around the Z axis.

[0010] In a further optional solution, the first axis mechanism also includes a first guide rail arranged on the base, a first lead screw arranged parallel to the first guide rail, and a first motor for driving the first lead screw to rotate, the first slide is threadedly connected to the first lead screw, and the first slide is slidingly matched with the first guide rail, and the first lead screw is rotatably arranged on the base.

[0011] In a further optional solution, the second axis mechanism also includes a second lead screw threadedly connected to the nut seat and a second motor for driving the second lead screw to rotate, a second guide rail is provided on the second slide, and the second lead screw is rotatably arranged on the second slide, the second guide rail is arranged parallel to the second lead screw, the nut seat is slidably connected to the second guide rail, and the second motor is arranged on the second slide.

[0012] As a further optional solution, two nut seats are provided, the second slide is in the shape of an elongated strip, and the length direction of the second slide is arranged along the Y-axis.

[0013] A further optional solution is that the ball spline screw mechanism also includes a mounting frame arranged on the second slide, the mounting frame is provided with a rotatable spline nut and ball nut, the spline nut and ball nut are vertically distributed, the spline screw is sleeved in the spline nut and ball nut, and the mounting frame is provided with a third motor connected to the spline nut and a fourth motor connected to the ball nut.

[0014] A further optional solution is that a shell is provided outside the ball spline screw mechanism, and the top and bottom of the shell are provided with openings for the upper and lower ends of the spline screw to pass through, the shell is provided with an air inlet connector and an air outlet connector, and the shell is provided with a temperature sensor and a humidity sensor.

[0015] As a further optional solution, the openings at the top and bottom of the shell are both provided with water-blocking brushes.

[0016] Compared with the prior art, the four-axis drive module of the dispensing machine of this application has at least the following features:

[0017] Beneficial effects:

[0018] The first-axis mechanism and the second-axis mechanism in this four-axis drive module are arranged in a cross structure, and the ball spline screw mechanism is arranged on one end of the second-axis mechanism. Compared with the existing gantry-type four-axis module, the structure is more compact and the end installation is simpler; compared with the existing SCARA four-axis robot, the dispensing operation space is wider and the range is larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1This is a schematic diagram of a four-axis drive module of a dispensing machine according to one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a four-axis drive module of a dispensing machine according to another embodiment of the present invention.

[0022] In the figure: 1, first axis mechanism; 11, base; 12, first guide rail; 13, first lead screw; 14, first motor; 15, first slide;

[0023] 2. Second axis mechanism; 21. Nut seat; 22. Second lead screw; 23. Second motor; 24. Second slide; 25. Second guide rail;

[0024] 3. Ball spline screw mechanism; 31. Spline screw; 32. Mounting bracket; 33. Spline nut; 34. Ball nut; 35. Third motor; 36. Fourth motor;

[0025] 4. Shell; 41. Opening; 42. Air inlet connector; 43. Air outlet connector. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] refer to Figure 1One embodiment of the present invention shows a four-axis drive module for a dispensing machine, including a first axis mechanism 1, a second axis mechanism 2, and a ball spline screw mechanism 3. The first axis mechanism 1 includes a base 11 and a first slide 15, the first slide 15 being connected to the base 11 by a screw, and the first slide 15 moving along the X-axis on the base 11. The second axis mechanism 2 is arranged on the first slide 15, and the second axis mechanism 2 includes a nut seat 21 and a second slide 24, the second slide 24 being connected to the nut seat 21 by a screw, and the second slide 24 moving along the X-axis on the nut seat 21, and the second slide 24 is arranged crosswise with the first slide 15. The ball spline screw mechanism 3 is arranged at one end of the second slide 24, and the ball spline screw mechanism 3 includes a spline screw 31 arranged to rise and fall along the Z-axis and to rotate about the Z-axis. The X-axis and Y-axis are two mutually perpendicular directions on the same plane, and the Z-axis is perpendicular to the plane containing the X-axis and Y-axis.

[0030] Specifically, the first-axis mechanism 1 and the second-axis mechanism 2 in the four-axis drive module are arranged in a cross structure, and the ball spline screw mechanism 3 is arranged on one end of the second-axis mechanism 2. Compared with the existing gantry-type four-axis module, the structure is more compact and the end installation is simpler; compared with the existing SCARA four-axis robot, the dispensing operation space is wider and the range is larger.

[0031] Specifically, the above solution includes the first shaft mechanism 1 further comprising a first guide rail 12 provided on a base 11, a first lead screw 13 provided parallel to the first guide rail 12, and a first motor 14 for driving the first lead screw 13 to rotate. The first slide 15 is threadedly connected to the first lead screw 13, and the first slide 15 is slidably engaged with the first guide rail 12, and the first lead screw 13 is rotatably provided on the base 11. When the first motor 14 drives the first lead screw to rotate, since the first slide 15 is slidably connected to the first guide rail 12, the first guide rail 12 prevents the first slide 15 from rotating with the first lead screw. Therefore, the first lead screw drives the first slide 15 to move linearly along the first guide rail 12.

[0032] Specifically, the second shaft mechanism 2 further includes a second lead screw 22 threadedly connected to the nut seat 21 and a second motor 23 for driving the second lead screw 22 to rotate. A second guide rail 25 is provided on the second slide 24, and the second lead screw 22 is rotatably disposed on the second slide 24. The second guide rail 25 is disposed parallel to the second lead screw 22. The nut seat 21 is slidably connected to the second guide rail 25, and the second motor 23 is disposed on the second slide 24. Similarly, when the second motor 23 drives the second lead screw to rotate, the second lead screw drives the second slide 24 to move on the nut seat 21.

[0033] It should be noted that the second slide 24 in this embodiment is long and narrow, and the length direction of the second slide 24 is arranged along the Y-axis, so that the second slide 24 can drive the ball spline screw mechanism 3 to move to a larger extent on the Y-axis; and in order to ensure the stable translation of the second slide 24, two nut seats 21 are provided, and the two nut seats 21 are used to support and limit the second slide 24 to prevent the second slide 24 from tilting.

[0034] The above scheme is specific, such as Figure 1 As shown, the ball spline screw mechanism 3 also includes a mounting frame 32 arranged on the second slide 24, and a rotatable spline nut 33 and a ball nut 34 are provided on the mounting frame 32. The spline nut 33 and the ball nut 34 are vertically distributed, and the spline screw is sleeved in the spline nut 33 and the ball nut 34. The mounting frame 32 is provided with a third motor 35 that is transmission-connected to the spline nut 33 and a fourth motor 36 that is transmission-connected to the ball nut 34. When the third motor 35 drives the spline nut 33 to rotate and the fourth motor 36 drives the ball nut 34 to rotate, the spline screw 31 performs rotational motion, that is, the spline screw rotates around the Z axis; when the fourth motor 36 drives the ball nut 34 to rotate and the spline nut 33 is fixed, the spline screw 31 performs linear motion, that is, the spline screw rises and falls along the Z axis.

[0035] In some embodiments, some dispensing machines are hot melt glue dispensing machines, and the working temperature of the dispensing head thereof is 120-180°C. The hot air near the dispensing head will carry water vapor and rise to the vicinity of the ball spline screw mechanism 3, causing the temperature and humidity near the ball spline screw mechanism 3 to rise, which may easily lead to a decrease in the accuracy of the ball spline screw mechanism 3, an increase in friction, or even damage. In order to avoid the negative impact of hot air with water vapor on the ball spline screw mechanism 3, in this embodiment, Figure 2As shown, a shell 4 is provided outside the ball spline screw mechanism 3, and the top and bottom of the shell 4 are provided with openings 41 for the upper and lower ends of the spline screw 31 to pass through. An air inlet connector 42 and an air outlet connector 43 are provided on the shell 4, and a temperature sensor (not shown) and a humidity sensor (not shown) are provided in the shell 4.

[0036] Specifically, the lower end of the spline screw 31 is used to connect a dispensing head (not shown). When the dispensing head causes hot air accompanied by water vapor to rise, the shell 4 can be isolated to a certain extent, reducing the negative impact of hot air and water vapor on the ball spline screw mechanism 3; in addition, although some hot air and water vapor will still enter the shell 4, they can be detected by the temperature sensor and humidity sensor in the shell 4. When the temperature or humidity in the shell 4 is too high, on the one hand, the air inlet connector 42 can be used to introduce dry cold air into the shell 4 for cooling and reducing the humidity; on the other hand, the air outlet connector 43 can be used to remove moisture in the shell 4; when the air inlet connector 42 and the air outlet connector 43 are opened at the same time, the air circulation in the shell 4 can be accelerated.

[0037] The air inlet connector 42 is connected to an air supply device (not shown) via a pipeline, and the air outlet connector 43 is connected to an air extraction device (not shown) via a pipeline.

[0038] In this way, this embodiment can reduce the negative impact of the high temperature working condition of the dispensing head on the ball spline screw mechanism 3; it can keep the temperature and humidity near the ball spline screw mechanism 3 appropriate, avoiding excessive humidity causing the lubricating performance of the lubricating oil to decrease, thereby causing increased friction; it can also avoid excessive temperature causing thermal expansion of parts, thereby reducing positioning accuracy.

[0039] In some embodiments, in order to improve the isolation effect of the shell 4 on hot air and water vapor, the openings 41 located at the top and bottom of the shell 4 are provided with water-retaining brushes (not shown). In this way, the water-retaining brushes can reduce the gap between the opening 41 and the spline screw to allow hot air and water vapor to flow through.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A four-axis drive module for a dispensing machine, characterized in that: include: A first axis mechanism, a second axis mechanism, and a ball spline screw mechanism; The first axis mechanism includes a base and a first slide, the first slide is connected to the base by a screw, and the first slide moves along the X-axis on the base; The second axis mechanism is arranged on the first slide, the second axis mechanism includes a nut seat and a second slide, the second slide is connected to the nut seat with a lead screw, the second slide moves along the X-axis on the nut seat, and the second slide is arranged crosswise with the first slide; The ball spline screw mechanism is arranged at one end of the second slide, and the ball spline screw mechanism includes a spline screw arranged to be lifted along the Z axis and rotated around the Z axis.

2. The four-axis drive module of the dispensing machine according to claim 1, characterized in that: The first axis mechanism also includes a first guide rail arranged on the base, a first screw arranged parallel to the first guide rail, and a first motor for driving the first screw to rotate. The first slide is threadedly connected to the first screw, and the first slide is slidably matched with the first guide rail. The first screw is rotatably arranged on the base.

3. The four-axis drive module of the dispensing machine according to claim 2, characterized in that: The second shaft mechanism also includes a second lead screw threadedly connected to the nut seat and a second motor for driving the second lead screw to rotate. A second guide rail is provided on the second slide, and the second lead screw is rotatably arranged on the second slide. The second guide rail is arranged parallel to the second lead screw, the nut seat is slidably connected to the second guide rail, and the second motor is arranged on the second slide.

4. The four-axis drive module of the dispensing machine according to claim 3, characterized in that: There are two nut seats, the second slide is in a long strip shape, and the length direction of the second slide is arranged along the Y axis.

5. The four-axis drive module of the dispensing machine according to claim 3, characterized in that: The ball spline screw mechanism also includes a mounting frame arranged on the second slide, and a rotatable spline nut and a ball nut are provided on the mounting frame. The spline nut and the ball nut are distributed vertically, and the spline screw is sleeved in the spline nut and the ball nut. The mounting frame is provided with a third motor that is transmission-connected to the spline nut and a fourth motor that is transmission-connected to the ball nut.

6. The four-axis drive module of the dispensing machine according to claim 1, characterized in that: A shell is provided outside the ball spline screw mechanism, and the top and bottom of the shell are provided with openings for the upper and lower ends of the spline screw to pass through. The shell is provided with an air inlet connector and an air outlet connector, and a temperature sensor and a humidity sensor are provided inside the shell.

7. The four-axis drive module of the dispensing machine according to claim 6, characterized in that: The openings at the top and bottom of the shell are both provided with water-blocking brushes.

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