Novel linear module

Abstract

The utility model discloses a novel linear module. The novel linear module comprises a linear driving motor, a guide rail mounting seat, a linear guide rail, a nut seat, a connecting nut mounted on the nut seat and a sliding block assembled on the linear guide rail in a sliding manner. The guide rail mounting base comprises a bottom plate and side plates located on the two sides of the bottom plate. The end of a machine shell of the linear driving motor is provided with a first limiting boss which extends into the guide rail mounting base and is attached to the side plates on the two sides. The nut seat is fixed to the sliding block and provided with a horizontal positioning face attached to the top face of the sliding block and a vertical positioning face attached to the side face of one side of the sliding block, and the vertical positioning face and an output shaft of the linear driving motor are arranged in parallel. The linear module is simple in structure and convenient to install, various deviations of the linear module during operation are avoided through abutting connection of the nut base and the sliding block on the two perpendicular faces and abutting connection matching of the linear driving motor and the side edge of the guide rail installation base, and therefore the straightness and the parallelism of the nut base are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of linear module design technology, and in particular to a novel linear module, mainly used in the field of laser cutting heads. Background Technology

[0002] Motor modules are now widely used in linear motion control, commonly for horizontal or vertical movement of objects, and can also achieve curved motion through multi-module coordination. Commonly available modules consist of a motor, coupling, bearings, lead screw, nut seat, nut, guide rail, and slider. The working principle is generally as follows: the driver drives the motor to rotate the lead screw, which in turn drives the meshing nut in a linear motion, and the nut then drives the slider to move linearly along the guide rail.

[0003] Currently, laser modules often require very small size and high precision. However, in existing linear motor modules, the nut seat is simply placed above the slider during assembly, without any limiting structure between them, as described in the linear module structure in patent number CN220475538U. Therefore, misalignment may occur between the slider and the nut seat. Furthermore, the existing technology lacks a limiting structure for axial parallelism between the base of the guide rail and the motor, resulting in low coaxiality between the nut mounted on the nut seat and the linear motor's lead screw. This affects the lifespan and linearity of the linear module, and may even cause jamming.

[0004] In addition, the contact area between the nut seat and the load in the existing linear module is relatively small, which can easily lead to unstable operation under load.

[0005] Therefore, how to design a linear module for laser cutting heads that can improve the straightness of operation is a technical problem that needs to be solved. Utility Model Content

[0006] To address the technical problem in existing linear modules where there are no limiting structures for axial parallelism between the nut seat and the slider, or between the base of the mounting rail and the motor, resulting in low coaxiality between the nut mounted on the nut seat and the lead screw of the linear motor, thus affecting the lifespan and linearity of the linear module, this invention provides a novel linear module to solve the above problems.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a linear module with good running straightness, including a linear drive motor, a guide rail mounting base, a linear guide rail, a nut seat, a connecting nut mounted on the nut seat, and a slider slidably assembled on the linear guide rail; the connecting nut is threadedly engaged with the output shaft of the linear drive motor.

[0008] The guide rail mounting base includes a base plate and side plates located on both sides of the base plate. The linear guide rail is mounted on the base plate of the guide rail mounting base. The linear drive motor is fixed to the guide rail mounting base, and the end of the housing of the linear drive motor has a first limiting boss that extends into the interior of the guide rail mounting base and fits against the two side plates. The nut seat is fixed to the slider. The nut seat has a horizontal positioning surface that fits against the top surface of the slider and a vertical positioning surface that fits against one side of the slider. The vertical positioning surface is arranged parallel to the output shaft of the linear drive motor.

[0009] In an optional embodiment of this utility model, the bottom plate surface of the guide rail mounting base has a guide rail mounting groove, and the linear guide rail is placed in the guide rail mounting groove.

[0010] In an optional embodiment of this utility model, the linear guide rail is offset from the output shaft of the linear drive motor.

[0011] In an optional embodiment of this invention, the height of the upper surface of the slider is greater than the height of the central axis of the linear drive motor.

[0012] In an optional embodiment of this utility model, the linear guide rail protrudes above the surface of the guide rail mounting groove in height.

[0013] In an optional embodiment of this utility model, a motor mounting plate is fixed to the end of the housing of the linear drive motor, and the first limiting boss is located on the motor mounting plate.

[0014] In an optional embodiment of this utility model, the nut seat does not contact the bottom plate and two side plates of the guide rail mounting seat.

[0015] In an optional embodiment of this utility model, a sensor mounting plate is fixed at the end of the guide rail mounting base away from the linear drive motor, and a photoelectric sensor is provided on the sensor mounting plate.

[0016] In an optional embodiment of this utility model, the sensor mounting plate has a second limiting boss that extends into the guide rail mounting seat and fits against the two side plates.

[0017] In an optional embodiment of this utility model, buffer pads are installed on the fixing structures located at both ends of the guide rail mounting plate.

[0018] The beneficial effects of this utility model are:

[0019] (1) The linear module described in this utility model has a simple structure and is easy to install. By the contact between the nut seat and the slider on two perpendicular surfaces and the contact between the linear drive motor and the side of the guide rail mounting seat, various offsets during the operation of the linear module are avoided, so as to ensure the straightness and parallelism of the nut seat.

[0020] (2) The present invention sets the guide rail off from the central axis of the linear drive motor, thereby reducing the height of the linear module, improving the structural compactness of the linear module, increasing the surface area of ​​the nut seat, increasing the contact area between the nut seat and the load, and making the load run more smoothly. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is an exploded view of a specific embodiment of the linear module with good running straightness described in this utility model;

[0023] Figure 2 This is a perspective view of a specific embodiment of the linear module with good running straightness described in this utility model.

[0024] Figure 3 This is an axial sectional view of a specific embodiment of the linear module with good running straightness described in this utility model;

[0025] Figure 4 This is a side view of a specific embodiment of the linear module with good running straightness described in this utility model.

[0026] In the diagram, 1. Linear drive motor, 2. Guide rail mounting base, 201. Base plate, 202. Side plate, 3. Linear guide rail, 4. Nut seat, 5. Connecting nut, 6. Slider, 7. Lead screw, 8. First limiting boss, 9. Horizontal positioning surface, 10. Vertical positioning surface, 11. Guide rail mounting groove, 12. Motor mounting plate, 13. Through hole, 14. Baseline, 15. Sensor mounting plate, 16. Second limiting boss, 17. Buffer pad. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] Example 1

[0029] like Figures 1-4 As shown, a linear module with good straightness includes a linear drive motor 1, a guide rail mounting base 2, a linear guide rail 3, a nut seat 4, a connecting nut 5 mounted on the nut seat 4, and a slider 6 slidably mounted on the linear guide rail 3; the connecting nut 5 is threadedly engaged with the output shaft of the linear drive motor 1. The linear drive motor 1 in this invention is a lead screw 7 stepper motor, and its output shaft is the lead screw 7.

[0030] The guide rail mounting base 2 includes a base plate 201 and side plates 202 located on both sides of the base plate 201. The cross-section of the guide rail mounting base 2 is a concave structure with an open top. The linear guide rail 3 is mounted on the base plate 201 of the guide rail mounting base 2. The linear drive motor 1 is fixed to the guide rail mounting base 2, and the end of the housing of the linear drive motor 1 has a first limiting boss 8 that extends into the interior of the guide rail mounting base 2 and fits against the side plates 202. The parallelism between the linear guide rail 3 and the lead screw 7 depends on the installation accuracy of the guide rail mounting base 2 and the linear drive motor 1. The first limiting boss 8 can serve as a positioning surface for the installation of the guide rail mounting base 2 and the linear drive motor 1 through its contact surface with the side plate 202, ensuring the center parallelism of the two. The nut seat 4 is fixed to the slider 6. The nut seat 4 has a horizontal positioning surface 9 that fits against the top surface of the slider 6 and a vertical positioning surface 10 that fits against one side surface of the slider 6. The vertical positioning surface 10 is arranged parallel to the output shaft of the linear drive motor 1. The horizontal positioning surface 9 ensures that the nut seat 4 is placed stably on the slider 6 without contacting the base plate 201. The vertical positioning surface 10 can prevent the mounting hole for the connecting nut 5 on the nut seat 4 from shifting, ensuring the straightness of the nut seat 4's operation and preventing the connecting nut 5 from jamming with the lead screw 7.

[0031] like Figures 1-3 As shown, a motor mounting plate 12 is fixed to the end of the housing of the linear drive motor 1, and the first limiting boss 8 is located on the motor mounting plate 12.

[0032] This invention ensures the parallelism between the first limiting boss 8 on the linear drive motor 1 and the center of the guide rail mounting base 2, thereby ensuring the parallelism between the linear guide rail 3 and the lead screw 7 on the guide rail mounting base 2. Then, through the design of two mutually perpendicular positioning surfaces (horizontal positioning surface 9 and vertical positioning surface 10) on the nut seat 4, the parallelism between the nut seat 4 and the slider 6 is ensured, and the distance between the two is precisely controlled, thereby ensuring that the center parallelism and coaxiality of the connecting nut 5 and the lead screw 7 are guaranteed, and that the motor will not be unstable due to the center tilt or offset of the connecting nut 5.

[0033] The linear guide rail 3 can be directly fixed to the base plate 201 according to the preset mounting points on the guide rail mounting base 2. In this embodiment, the mounting method is that the surface of the base plate 201 of the guide rail mounting base 2 has a guide rail mounting groove 11, and the linear guide rail 3 is placed in the guide rail mounting groove 11. The guide rail mounting groove 11 fits tightly against the side of the linear guide rail 3, which can play a good positioning role. In a further design, the linear guide rail 3 protrudes from the surface of the guide rail mounting groove 11 in height, and the protruding part can fit against the slider 6.

[0034] To avoid friction between the nut seat 4 and the inner surface of the guide rail mounting base 2, it is preferable that the nut seat 4 does not contact the base plate 201 and the two side plates 202 of the guide rail mounting base 2.

[0035] Example 2

[0036] Based on Embodiment 1, the linear guide rail 3 is offset from the output shaft of the linear drive motor 1. That is, the linear guide rail 3 is not directly below the lead screw 7. This allows the height of the upper surface of the slider 6 to be greater than the height of the central shaft of the linear drive motor 1, thereby reducing the height of the nut seat 4, making the module structure more compact, and increasing the width dimension of the nut seat 4. This increases the contact area between the nut seat 4 and the load (i.e., the upper surface area of ​​the nut seat 4) without increasing the weight of the module, making the load run more smoothly.

[0037] like Figure 1 and Figure 4 As shown, the nut seat 4 has a through hole 13 for the lead screw 7 to pass through. The lower side of the nut seat 4 has an L-shaped notch formed by the horizontal positioning surface 9 and the vertical positioning surface 10. The L-shaped notch is arranged side by side with the through hole 13 to reduce the occupation of height space.

[0038] The anti-offset effect of the two positioning surfaces is explained in detail below:

[0039] The inner bottom of the guide rail mounting base 2 has a guide rail mounting groove 11 reserved for the linear guide rail 3. The mounting groove is tightly fitted to the linear guide rail 3. With the straight line where the central axis of the lead screw 7 is located as the center line, the side of the guide rail mounting groove 11 closest to the center line is the reference line 14. Figure 4 As shown, the distance C between the baseline 14 and the center line is a fixed value. After the slider 6 is installed in place, the distance A from the vertical positioning surface 10 to the center of the through hole 13 of the nut seat 4 is equal to the distance from the side of the slider 6 near the center line of the lead screw 7 to the center line of the lead screw 7. Therefore, the distance B from the side of the slider 6 near the center line of the lead screw 7 to the baseline 14 plus the distance A from the vertical positioning surface 10 to the center of the through hole 13 of the nut seat 4 equals the distance C. Therefore, placing the vertical positioning surface 10 of the nut seat 4 against the side of the slider 6 near the center line can ensure the centerness of the nut seat 4, that is, at this time, there is no offset between the center of the nut seat 4 and the center of the lead screw 7.

[0040] Example 3

[0041] Based on the above embodiment, a sensor mounting plate 15 is fixed to the end of the guide rail mounting base 2 away from the linear drive motor 1, and a photoelectric sensor is provided on the sensor mounting plate 15. The photoelectric sensor is electrically connected to the linear drive motor 1 and can detect the movement distance of the lead screw 7, thereby controlling the start and stop of the linear drive motor 1 and realizing precise control of the sliding distance.

[0042] In a preferred embodiment, the sensor mounting plate 15 has a second limiting boss 16 that extends into the guide rail mounting base 2 and abuts against the side plates 202. Similar to the first limiting boss 8, the second limiting boss 16 is used to achieve better positioning of the photoelectric sensor, preventing the photoelectric sensor from shifting and failing to capture the position information of the lead screw 7 when the diameter of the lead screw 7 is small. Simultaneously, the first limiting boss 8 and the second limiting boss 16 also ensure good symmetry of the guide rail mounting base 2.

[0043] In a further design, buffer pads 17 are installed on the fixing structures located at both ends of the guide rail mounting plate. For example... Figure 3 As shown, buffer pads 17 are provided on both the sensor mounting plate 15 and the motor mounting plate 12 to prevent the nut seat 4 from hitting the sensor mounting plate 15 or the connecting nut 5 from hitting the motor mounting plate 12 due to excessive travel of the slider 6.

[0044] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0046] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A new linear module, characterized by: The utility model relates to a linear drive motor (1), guide rail mounting seat (2), linear guide rail (3), nut seat (4), connecting nut (5) installed on nut seat (4) and slider (6) slidingly assembled on linear guide rail (3), connecting nut (5) and the output shaft of linear drive motor (1) are threadedly matched, The guide rail mounting seat (2) includes a bottom plate (201) and side plates (202) on both sides of the bottom plate (201), the linear guide rail (3) is mounted on the bottom plate (201) of the guide rail mounting seat (2), the linear drive motor (1) is fixed with the guide rail mounting seat (2), and the end of the shell of the linear drive motor (1) has a first limiting boss (8) extending into the guide rail mounting seat (2) and abutting against the two side plates (202), the nut seat (4) is fixed with the slider (6), the nut seat (4) has a horizontal positioning surface (9) abutting against the top surface of the slider (6) and a vertical positioning surface (10) abutting against one side surface of the slider (6), and the vertical positioning surface (10) is arranged in parallel with the output shaft of the linear drive motor (1).

2. The new linear module according to claim 1, characterized in that: The bottom plate (201) of the guide rail mounting seat (2) has a guide rail mounting groove (11) on the surface, and the linear guide rail (3) is arranged in the guide rail mounting groove (11).

3. The new linear module according to claim 1, characterized in that: The linear guide rail (3) is arranged in deviation from the output shaft of the linear drive motor (1).

4. The new linear module according to claim 3, characterized in that: The height of the upper surface of the slider (6) is greater than the height of the central shaft of the linear drive motor (1).

5. The new linear module according to claim 2, characterized in that: The linear guide rail (3) is arranged in protrusion from the surface of the guide rail mounting groove (11) in height.

6. The new linear module according to claim 1, characterized in that: The end of the shell of the linear drive motor (1) is fixed with a motor mounting plate (12), and the first limiting boss (8) is arranged on the motor mounting plate (12).

7. The new linear module according to claim 1, characterized in that: The nut seat (4) is not in contact with the bottom plate (201) and the two side plates (202) of the guide rail mounting seat (2).

8. The new linear module according to claim 1, characterized in that: The end of the guide rail mounting seat (2) away from the linear drive motor (1) is fixed with a sensor mounting plate (15), and the sensor mounting plate (15) is provided with a photoelectric sensor.

9. The new linear module according to claim 8, characterized in that: The sensor mounting plate (15) has a second limiting boss (16) extending into the guide rail mounting seat (2) and abutting against the two side plates (202).

10. The new linear module according to claim 1, characterized in that: The fixed structures at the two ends of the guide rail mounting plate are provided with buffer pads (17).

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