Linear motion mechanism based on gear driving

Abstract

The utility model relates to the technical field of linear motion mechanisms, in particular to a linear motion mechanism based on gear driving. Comprising a fixed sliding rail, inner driving teeth, inner moving teeth, an outer clamping plate a, an outer clamping plate b, a direct-current motor and a middle shaft cover. Racks are arranged on the upper side and the lower side in the fixed sliding rail, the inner driving teeth and the inner movable teeth are embedded between the upper rack and the lower rack of the fixed sliding rail through meshing after being perpendicularly placed and are meshed with the racks, and the inner driving teeth and the inner movable teeth move on the racks of the fixed sliding rail based on gear meshing. The outer clamping plate a and the outer clamping plate b are clamped on the two sides of the inner driving teeth and the inner moving teeth, an output shaft of the direct-current motor sequentially penetrates through the outer clamping plate b, the inner driving teeth and the outer clamping plate a, and linear motion of the inner driving wheel and the inner driving wheel on the fixed sliding rail is achieved through meshing of the inner driving wheel and the inner driving wheel between the racks; the inner driving wheel and the inner driving wheel are arranged on the fixed sliding rail, the running speed and the positions of the inner driving wheel and the inner driving wheel on the fixed sliding rail are controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of linear motion mechanisms, in particular to a linear motion mechanism based on gear drive. Background Art

[0002] Linear guides are used in high-precision or high-speed linear reciprocating motion situations, and can bear a certain torque, and can achieve high-precision linear motion under high load conditions. However, traditional linear guides often only have a guiding function and cannot independently control the movement on the guide. In addition, existing linear motion mechanisms have problems such as slow response speed, complex structure and easy damage, which cannot meet users' actual needs for diversified scenarios. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a linear motion mechanism based on gear drive, which can adjust the speed of the motion mechanism and enhance the movement speed and response speed of the mechanism. The specific technical solution is as follows:

[0004] The utility model provides a linear motion mechanism based on gear drive, comprising: a fixed slide rail, an inner driving gear, an inner moving gear, an outer clamping plate a, an outer clamping plate b, a DC motor and a middle shaft cover;

[0005] The fixed rail is provided with a rectangular opening inside, and racks are provided on the upper and lower sides of the rectangular opening. The inner driving gear and the inner moving gear are placed vertically and embedded between the upper and lower racks of the fixed rail through meshing, and mesh with the racks. The movement of the racks on the racks of the fixed rail is realized based on the meshing of the gears.

[0006] The outer clamping plate a and the outer clamping plate b are symmetrically arranged on both sides of the fixed slide rail, and the third screw passes through the first circular hole at the lower part of the outer clamping plate a, the inner movable tooth and the first circular hole at the lower part of the outer clamping plate b in sequence, and is threadedly connected with the corresponding third nut; the outer clamping plate a and the outer clamping plate b are clamped on both sides of the inner driving tooth and the inner movable tooth to ensure that the movable space of the inner driving tooth and the inner movable tooth is limited inside the fixed slide rail;

[0007] The output shaft of the DC motor passes through the first circular hole on the upper part of the outer clamping plate b, the inner drive gear and the first circular hole on the upper part of the outer clamping plate a in sequence, and the second screw passes through the middle shaft cover and is threadedly connected with the axial threaded hole on the output shaft of the DC motor;

[0008] A plurality of first screws pass through the second circular holes on the outer clamping plate b and are connected with the threaded holes on the DC motor to fix the DC motor on the outer clamping plate b.

[0009] Furthermore, the outer plate a and the outer plate b are of the same size and shape; two first circular holes of the same size are opened at corresponding positions of the outer plate a and the outer plate b; the threaded holes on the DC motor are evenly distributed around the output shaft of the DC motor; the position of the second circular hole on the outer plate b corresponds to the position of the threaded hole on the DC motor.

[0010] Furthermore, through grooves are provided in the horizontal direction of the relative end surfaces of the outer clamping plate a and the outer clamping plate b, and the second circular hole on the outer clamping plate b is an inner countersunk hole. When the first screw is screwed into the outer clamping plate b, the movement of the inner driving teeth and the inner movable teeth is not affected.

[0011] Furthermore, the length of the fixed slide rail is changed according to specific scenarios.

[0012] Furthermore, the center of the inner drive gear is set as a notch circle, which coincides with the output shaft of the DC motor, so that the DC motor can drive the inner drive gear to move and realize power transmission.

[0013] Furthermore, the gear parameters used by the internal drive gear and the internal movable gear are the same.

[0014] Furthermore, the vertical heights of the outer clamping plates a and b are greater than the vertical height of the rectangular opening.

[0015] Furthermore, the first screw and the second screw are M3 screws; and the third screw is an M6 screw.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model utilizes the meshing between the inner moving wheel and the inner driving wheel between the racks, not only realizing that the inner driving gear and the inner moving gear provide movable horizontal degrees of freedom on the fixed slide rail, realizing the linear motion of the rack on the fixed slide rail, but also providing a precise position for the load on the mechanism because the plane formed by the two rotating shafts of the inner moving wheel and the inner driving wheel is perpendicular to the horizontal plane of the fixed slide rail. Under the condition of linear motion, by setting a DC motor, based on the transmission principle of gears, the movement of the inner driving gear and the inner moving gear on the fixed slide rail is quickly controlled, and the running speed of the inner driving gear and the inner moving gear and the position of the inner driving gear and the inner moving gear on the fixed slide rail are controlled, and the overall structure of the utility model is simple and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded schematic diagram of a linear motion mechanism based on gear drive according to an embodiment of the utility model;

[0019] Figure 2 It is a left side schematic diagram of a disassembled diagram of a linear motion mechanism based on gear drive according to an embodiment of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the internal moving gear and the internal driving gear of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of a gear-driven linear motion mechanism according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 5 It is a structural schematic diagram of a DC motor according to an embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of a gear-driven linear motion mechanism according to an embodiment of the present invention. Figure 2 ;

[0024] Among them, 1. fixed slide rail; 2. internal drive gear; 3. internal moving gear; 4. outer clamping plate a; 5. outer clamping plate b; 6. DC motor; 7. first screw; 8. third nut; 9. third screw; 10. middle shaft cover; 11. second screw; 12. first round hole; 13. second round hole. DETAILED DESCRIPTION

[0025] In order to better explain the present invention and facilitate understanding, the technical scheme and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0026] like Figure 1-6 As shown, the utility model provides a linear motion mechanism based on gear drive, comprising: a fixed slide rail 1, an inner drive gear 2, an inner movable gear 3, an outer clamping plate a4, an outer clamping plate b5, a DC motor 6 and a middle shaft cover 10;

[0027] The fixed rail 1 is provided with a rectangular opening inside, and racks are provided on the upper and lower sides of the rectangular opening. The inner drive gear 2 and the inner movable gear 3 are placed vertically and embedded between the upper and lower racks of the fixed rail 1 through meshing, and mesh with the racks. The movement of the inner drive gear 2 and the inner movable gear 3 on the rack of the fixed rail 1 is realized based on the meshing of the gears.

[0028] The outer clamping plate a4 and the outer clamping plate b5 are symmetrically arranged on both sides of the fixed slide rail 1, and the third screw 9 passes through the first circular hole 12 at the lower part of the outer clamping plate a4, the inner movable tooth 3 and the first circular hole 12 at the lower part of the outer clamping plate b5 in sequence, and is threadedly connected with the corresponding third nut 8; the outer clamping plate a4 and the outer clamping plate b5 are clamped on both sides of the inner driving tooth 2 and the inner movable tooth 3 to ensure that the movable space of the inner driving tooth 2 and the inner movable tooth 3 is limited inside the fixed slide rail 1; it plays a positioning role;

[0029] The output shaft of the DC motor 6 passes through the first circular hole 12 on the upper part of the outer clamping plate b5, the inner drive gear 2 and the first circular hole 12 on the upper part of the outer clamping plate a4 in sequence, and the second screw 11 passes through the middle shaft cover 10 and is threadedly connected with the axial threaded hole on the output shaft of the DC motor 6.

[0030] A plurality of first screws 7 pass through the second circular holes 13 on the outer clamping plate b5 and are connected to the threaded holes on the DC motor 6 to fix the DC motor 6 on the outer clamping plate b5.

[0031] The outer plate a4 and the outer plate b5 are of the same size and shape; two first circular holes 12 of the same size are provided at corresponding positions of the outer plate a4 and the outer plate b5; the threaded holes on the DC motor 6 are evenly distributed around the output shaft of the DC motor 6; the position of the second circular hole 13 on the outer plate b5 corresponds to the position of the threaded holes on the DC motor 6.

[0032] The outer clamping plate a4 and the outer clamping plate b5 have through grooves in the horizontal direction on their opposite end surfaces. The second circular hole 13 on the outer clamping plate b5 is an inner countersunk hole. When the first screw 7 is screwed into the outer clamping plate b5, the movement of the inner driving gear 2 and the inner movable gear 3 is not affected.

[0033] The length of the fixed slide rail 1 varies according to specific scenarios.

[0034] The center of the inner drive gear 2 is set as a notch circle, which coincides with the output shaft of the DC motor 6, so that the DC motor 6 can drive the inner drive gear 2 to move, realize the transmission of power, and then enable the entire mechanism to move along the fixed slide rail 1. The rotational motion of the DC motor 6 is converted into the motion of the inner drive gear 2 and the inner movable gear 3 on a straight line.

[0035] The gear parameters used by the internal drive gear 2 and the internal movable gear 3 are the same.

[0036] The vertical heights of the outer clamping plates a4 and b5 are greater than the vertical height of the rectangular opening.

[0037] The first screw 7 and the second screw 11 are M3 screws; the third screw 9 is an M6 screw.

[0038] The plane formed by the two rotating axes of the inner moving wheel 2 and the inner driving wheel 3 is perpendicular to the horizontal plane of the fixed slide rail 1, providing a precise position for the load on the mechanism.

[0039] Working process: start the DC motor 6 to rotate the output shaft of the DC motor 6, driving the internal drive gear 2 connected to it to rotate, and the internal drive gear 2 drives the internal movable gear 3 to rotate, and through meshing with the rack, the internal drive gear 2 and the internal movable gear 3 can realize the linear motion of the fixed slide rail 1; the outer clamping plate a4 and the outer clamping plate b5 can be connected to the load by means of screw assembly; the movement speed of the rack is controlled by controlling the rotation speed of the output shaft of the DC motor 6.

Claims

1. A linear motion mechanism based on gear drive, characterized in that: include: A fixed slide rail (1), an inner driving gear (2), an inner moving gear (3), an outer clamping plate a (4), an outer clamping plate b (5), a DC motor (6) and a center shaft cover (10); The fixed slide rail (1) is provided with a rectangular opening inside, and the upper and lower sides of the rectangular opening are provided with racks. The inner drive gear (2) and the inner movable gear (3) are placed vertically and embedded between the upper and lower racks of the fixed slide rail (1) through meshing, and mesh with the racks. Based on the meshing of the gears, the movement of the inner drive gear (2) and the inner movable gear (3) on the rack of the fixed slide rail (1) is realized; The outer clamping plate a (4) and the outer clamping plate b (5) are symmetrically arranged on both sides of the fixed slide rail (1); the third screw (9) passes through the first circular hole (12) at the bottom of the outer clamping plate a (4), the inner movable tooth (3) and the first circular hole (12) at the bottom of the outer clamping plate b (5) in sequence, and is threadedly connected with the corresponding third nut (8); the outer clamping plate a (4) and the outer clamping plate b (5) are clamped on both sides of the inner driving tooth (2) and the inner movable tooth (3), so as to ensure that the movable space of the inner driving tooth (2) and the inner movable tooth (3) is limited inside the fixed slide rail (1); The output shaft of the DC motor (6) passes through the first circular hole (12) on the upper part of the outer clamping plate b (5), the inner drive gear (2) and the first circular hole (12) on the upper part of the outer clamping plate a (4) in sequence, and the second screw (11) passes through the middle shaft cover (10) and is threadedly connected with the axial threaded hole on the output shaft of the DC motor (6); A plurality of first screws (7) pass through the second circular holes (13) on the outer clamping plate b (5) and are connected to the threaded holes on the DC motor (6), thereby fixing the DC motor (6) on the outer clamping plate b (5).

2. A gear-driven linear motion mechanism according to claim 1, characterized in that: The outer clamping plate a (4) and the outer clamping plate b (5) are of the same size and shape; two first circular holes of the same size are provided at corresponding positions of the outer clamping plate a (4) and the outer clamping plate b (5); the threaded holes on the DC motor (6) are evenly distributed around the output shaft of the DC motor (6) in the circumferential direction; and the position of the second circular hole (13) on the outer clamping plate b (5) corresponds to the position of the threaded hole on the DC motor (6).

3. A gear-driven linear motion mechanism according to claim 2, characterized in that: The outer clamping plate a (4) and the outer clamping plate b (5) have through grooves in the horizontal direction on their opposite end faces. The second circular hole (13) on the outer clamping plate b (5) is an inner countersunk hole. When the first screw (7) is screwed into the outer clamping plate b (5), the movement of the inner driving gear (2) and the inner moving gear (3) is not affected.

4. The gear-driven linear motion mechanism according to claim 1, characterized in that: The length of the fixed slide rail (1) is changed according to specific scenarios.

5. The gear-driven linear motion mechanism according to claim 1, characterized in that: The center of the inner drive gear (2) is set as a notch circle, which coincides with the output shaft of the DC motor (6), so that the DC motor (6) can drive the inner drive gear (2) to move, thereby realizing power transmission.

6. The gear-driven linear motion mechanism according to claim 1, characterized in that: The gear parameters used by the internal drive gear (2) and the internal movable gear (3) are the same.

7. The gear-driven linear motion mechanism according to claim 1, characterized in that: The vertical heights of the outer clamping plates a (4) and b (5) are greater than the vertical height of the rectangular opening.

8. The gear-driven linear motion mechanism according to claim 1, characterized in that: The first screw (7) and the second screw (11) are M3 screws; the third screw (9) is an M6 screw.

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