Low-vibration low-noise double-shaft driving mechanism

Abstract

The utility model discloses a low-vibration low-noise double-shaft driving mechanism, which comprises a double-shaft driving motor mechanism, a double-shaft stepping driving motor and driving shafts symmetrically arranged on two opposite side surfaces of the double-shaft stepping driving motor, the mounting plate is mounted on the side face of the double-shaft stepping driving motor, and the fixing ring blocks are distributed in the center of the mounting plate. The vibration reduction sealing piece comprises an outer sealing ring arranged on the outer side of the driving shaft in a sleeving mode, a buffering ring rotationally arranged on the outer side of the outer sealing ring in a sleeving mode, a limiting ring arranged on the outer side of the buffering ring in a sleeving mode and connecting blocks evenly distributed on the outer surface of the limiting ring. The design that the sealing ring is convenient to replace is adopted, the expansion column expands the outer expansion sleeve, so that the connecting block is stably installed, the outer sealing ring is convenient to replace by loosening and tightening the expansion column and detachably fixing the buffer ring, the limiting ring and the outer sealing ring in the ring block, and the sealing ring is convenient to replace by additionally arranging one layer of outer sealing ring. And large vibration and noise generated after the gap between the driving shaft and the inner sealing ring is enlarged are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive mechanisms, and in particular relates to a dual-axis drive mechanism with low vibration and low noise. Background Art

[0002] The main function of the drive mechanism is to convert other types of energy into mechanical energy to achieve precise control and efficient operation. It is widely used in many fields. The dual-axis drive stepper motor is a conventional high-speed, high-precision motor drive mechanism that can simultaneously control the movement of two axes to meet various high-precision processing requirements.

[0003] The dual-axis drive stepper motor drives dual-axis movement and the drive shaft rotates. Over a long period of time, the gap between the drive shaft and the sealing ring increases, causing the drive shaft to vibrate and generate noise. The disassembly of the sealing ring is cumbersome and cannot be replaced quickly. The drive shaft rotates and the drive shaft and the sealing ring rotate and contact. In addition, the drive shaft will produce a small-level collision with the sealing ring. Over a long period of time, the sealing ring will loosen, thereby increasing the gap between the drive shaft and the sealing ring. If the sealing ring cannot be replaced in time, the drive shaft that vibrates and generates noise for a long time may break due to deformation, affecting its use. When the dual-axis drive stepper motor is in use, there is a problem that there is no design that is convenient for replacing the sealing ring. For this reason, the present application proposes a dual-axis drive mechanism with low vibration and low noise. Utility Model Content

[0004] The purpose of the utility model is to provide a low-vibration and low-noise dual-axis drive mechanism to solve the problem that the dual-axis drive stepper motor proposed in the above background technology has no design that is convenient for replacing the sealing ring when in use.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: a low-vibration and low-noise dual-axis drive mechanism, comprising

[0006] A dual-axis drive motor mechanism includes a dual-axis stepping drive motor and drive shafts symmetrically mounted on two opposite sides of the dual-axis stepping drive motor;

[0007] Limiting assembly, a mounting plate installed on the side of the dual-axis stepper drive motor, and a fixed ring block distributed in the center of the mounting plate;

[0008] The vibration-damping seal comprises an outer sealing ring sleeved on the outside of the drive shaft, a buffer ring rotatably sleeved on the outside of the outer sealing ring, a limiting ring sleeved on the outside of the buffer ring, and connecting blocks evenly distributed on the outer surface of the limiting ring;

[0009] The locking assembly includes a tightening piece installed on the inner surface of the fixed ring block, a rubber ring sleeved on the outside of the tightening piece, and an expansion column threadedly connected to the tightening piece. The tightening piece includes a fixed column connected to the fixed ring block and an outer expansion sleeve sleeved on the outside of the fixed column.

[0010] Preferably, a circular groove and a limiting groove connected to the circular groove are provided on the surface of the fixed ring block, the outer sealing ring, the buffer ring and the limit ring are installed in the circular groove, and the connecting block is installed in the limiting groove.

[0011] Preferably, the centers of the drive shaft, the outer sealing ring, the buffer ring and the limit ring are on the same axis, and a groove is provided on the outer surface of the buffer ring.

[0012] Preferably, the inner surface of the limiting ring is provided with a positioning protrusion that cooperates with the groove, and the positioning protrusion is a semi-cylindrical structure.

[0013] Preferably, the external expansion sleeve is a hollow frustum structure, and a deformation slit communicating with the interior is provided on the outer surface of the external expansion sleeve.

[0014] Preferably, one end of the expansion column is a conical portion and the other end is a round block portion, and an internal screw hole is provided at the center of the conical portion.

[0015] Preferably, the outer surface of one end of the fixing column that penetrates into the outer expansion sleeve is provided with an external thread, the fixing column cooperates with the inner screw hole, the outer surface of the tapered part of the expansion column is consistent with the inner surface of the outer expansion sleeve, and the rubber ring is provided with evenly distributed deformation circular holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model has a design for facilitating replacement of the sealing ring. The outer sealing ring is installed on the outside of the drive shaft. The outer sealing ring is designed as a layer of sealing to increase the sealing performance. The expansion column expands the outer expansion sleeve to expand the rubber ring, so that the connecting block is installed firmly. The buffer ring, the limit ring and the outer sealing ring inside the fixed ring block can be disassembled and fixed by loosening and tightening the expansion column, which facilitates replacement of the outer sealing ring. By adding a layer of outer sealing ring, large vibration and noise caused by the enlargement of the gap between the drive shaft and the inner sealing ring can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a side structural diagram of the fixed ring block of the utility model;

[0020] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0021] Figure 4 It is a schematic cross-sectional view of the external expansion sleeve of the utility model.

[0022] In the figure: 1. Dual-axis stepper drive motor; 3. Expansion column; 4. Expansion piece; 5. Rubber ring; 11. Drive shaft; 21. Mounting plate; 22. Fixed ring block; 31. Outer sealing ring; 32. Buffer ring; 33. Limiting ring; 34. Connecting block; 41. Fixed column; 42. Outer expansion sleeve; 331. Positioning protrusion. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe 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 the embodiments. 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.

[0024] Example

[0025] See also Figures 1 to 4The utility model provides a technical solution: a low-vibration and low-noise dual-axis drive mechanism, including a dual-axis drive motor mechanism, including a dual-axis stepper drive motor 1, a drive shaft 11 symmetrically mounted on the opposite side surfaces of the dual-axis stepper drive motor 1, the principle of the dual-axis stepper drive motor 1 driving the drive shaft 11 to rotate is a conventional technical means, and this application will not be described in detail; a limit assembly, a mounting plate 21 mounted on the side of the dual-axis stepper drive motor 1, a fixed ring block 22 distributed at the center position of the mounting plate 21, the mounting plate 21 and the fixed ring block 22 are integrally cast, the mounting plate 21 and the housing of the dual-axis stepper drive motor 1 are combined by a conventional method, the drive shaft 11 passes through the mounting plate 21 and the fixed ring block 22, and the fixed ring block 22 is mounted on the outside of the inner sealing ring joint provided on the drive shaft 11 and the dual-axis stepper drive motor 1; a vibration-damping seal, including an outer sealing ring 31 sleeved on the outside of the drive shaft 11, a buffer ring 32 rotatably sleeved on the outside of the outer sealing ring 31, and a limit ring 3 sleeved on the outside of the buffer ring 32 3. Connecting blocks 34 are evenly distributed on the outer surface of the limiting ring 33. The outer sealing ring 31 is installed on the outer side of the drive shaft 11. The outer sealing ring 31 is designed as a sealing layer to increase the sealing performance. The buffer ring 32 and the limiting ring 33 are made of spring steel material, which has a certain elasticity and rigidity. They can reduce the vibration force of the outer sealing ring 31 generated by the operation of the drive shaft 11 at a small level, and avoid the large vibration and noise caused by the widening of the gap between the drive shaft 11 and the inner sealing ring; the locking assembly includes a fixing ring block 22 installed on the fixing ring block 22. The expansion part 4 on the inner surface, the rubber ring 5 sleeved on the outside of the expansion part 4, and the expansion column 3 threadedly screwed with the expansion part 4, the expansion part 4 includes a fixed column 41 connected to the fixed ring block 22, and an outer expansion sleeve 42 sleeved on the outside of the fixed column 41. The fixed column 41 and the fixed ring block 22 are combined by a conventional method, and one end of the expansion column 3 is embedded in the outer expansion sleeve 42. The internal expansion column 3 and the fixed column 41 are combined by a conventional method. The expansion column 3 expands the outer expansion sleeve 42 to expand the rubber ring 5, so that the connecting block 34 is installed firmly.

[0026] In this embodiment, a circular groove and a limiting groove connected to the circular groove are provided on the surface of the fixed ring block 22. The outer sealing ring 31, the buffer ring 32, and the limit ring 33 are installed in the circular groove. The connecting block 34 is installed in the limiting groove. The fixed ring block 22 is installed on the outside of the joint position of the inner sealing ring provided on the drive shaft 11 and the dual-axis stepping drive motor 1. The position of the fixed ring block 22 is accurately installed.

[0027] In this embodiment, the centers of the drive shaft 11, the outer sealing ring 31, the buffer ring 32, and the limiting ring 33 are on the same axis. A groove is provided on the outer surface of the buffer ring 32, and a positioning protrusion 331 is provided on the inner surface of the limiting ring 33 to cooperate with the groove. The positioning protrusion 331 is a semi-cylindrical structure. The outer sealing ring 31 is installed on the outside of the drive shaft 11. The outer sealing ring 31 is designed as a layer of sealing to increase the sealing performance.

[0028] In this embodiment, the outer expansion sleeve 42 is a hollow frustum structure, and a deformation seam communicating with the interior is provided on the outer surface of the outer expansion sleeve 42. One end of the expansion column 3 is a conical portion and the other end is a round block portion. An internal screw hole is provided at the center of the cone core portion. The fixing column 41 penetrates into the outer expansion sleeve 42 and the outer surface of one end is provided with an external thread. The fixing column 41 cooperates with the internal screw hole. The outer surface of the conical portion of the expansion column 3 is consistent with the inner surface of the outer expansion sleeve 42. The rubber ring 5 is provided with evenly distributed deformation circular holes. One end of the expansion column 3 is embedded in the inner expansion sleeve 42. The expansion column 3 and the fixing column 41 are combined by conventional methods. The expansion column 3 expands the outer expansion sleeve 42, causing the rubber ring 5 to expand, so that the connecting block 34 is installed firmly.

[0029] The working principle and use process of this utility model:

[0030] The dual-axis drive stepper motor has a design that facilitates the replacement of the sealing ring when in use. The outer sealing ring 31 is installed on the outside of the drive shaft 11. The outer sealing ring 31 serves as a sealing design to increase the sealing performance.

[0031] The outer sealing ring 31 is installed on the outside of the drive shaft 11. The buffer ring 32 and the limit ring 33 limit the outer sealing ring 31, which can reduce the small-level vibration force generated by the operation of the drive shaft 11 on the outer sealing ring 31, and avoid the large vibration and noise caused by the widening gap between the drive shaft 11 and the inner sealing ring.

[0032] One end of the expansion column 3 is embedded in the outer expansion sleeve 42. The expansion column 3 and the fixed column 41 are assembled by conventional methods. The expansion column 3 expands the outer expansion sleeve 42, causing the rubber ring 5 to expand, so that the connection block 34 is firmly installed, and the expansion column 3 is easy to disassemble and install. Then, the buffer ring 32, the limit ring 33, and the outer sealing ring 31 inside the fixed ring block 22 can be removed, and the outer sealing ring 31 can be easily replaced.

[0033] To sum up: the design is convenient for replacing the sealing ring. The expansion column 3 expands the outer expansion sleeve 42, causing the rubber ring 5 to expand, so that the connecting block 34 is installed firmly. By loosening and tightening the expansion column 3, the buffer ring 32, the limit ring 33, and the outer sealing ring 31 inside the ring block 22 can be disassembled and fixed, making it easy to replace the outer sealing ring 31.

[0034] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-vibration and low-noise dual-axis drive mechanism, characterized by: include A dual-axis drive motor mechanism comprises a dual-axis stepping drive motor (1) and a drive shaft (11) symmetrically mounted on two opposite side surfaces of the dual-axis stepping drive motor (1); A limit assembly, a mounting plate (21) mounted on the side of the dual-axis stepping drive motor (1), and a fixed ring block (22) distributed at the center of the mounting plate (21); The vibration-damping seal comprises an outer sealing ring (31) sleeved on the outside of a driving shaft (11), a buffer ring (32) rotatably sleeved on the outside of the outer sealing ring (31), a limiting ring (33) sleeved on the outside of the buffer ring (32), and connecting blocks (34) evenly distributed on the outer surface of the limiting ring (33); The locking assembly comprises an expansion member (4) mounted on the inner surface of a fixed ring block (22), a rubber ring (5) sleeved on the outside of the expansion member (4), and an expansion column (3) threadedly connected to the expansion member (4); the expansion member (4) comprises a fixed column (41) connected to the fixed ring block (22) and an outer expansion sleeve (42) sleeved on the outside of the fixed column (41).

2. The low-vibration and low-noise dual-axis drive mechanism according to claim 1, characterized in that: A circular groove and a limiting groove communicating with the circular groove are provided on the surface of the fixing ring block (22); the outer sealing ring (31), the buffer ring (32), and the limiting ring (33) are installed in the circular groove; and the connecting block (34) is installed in the limiting groove.

3. The low-vibration and low-noise dual-axis drive mechanism according to claim 1, characterized in that: The centers of the drive shaft (11), the outer sealing ring (31), the buffer ring (32), and the limiting ring (33) are located on the same axis, and a groove is provided on the outer surface of the buffer ring (32).

4. The low-vibration and low-noise dual-axis drive mechanism according to claim 3, characterized in that: The inner surface of the limiting ring (33) is provided with a positioning protrusion (331) that cooperates with the groove, and the positioning protrusion (331) is a semi-cylindrical structure.

5. The low-vibration and low-noise dual-axis drive mechanism according to claim 1, characterized in that: The outer expansion sleeve (42) is a hollow frustum structure, and a deformation seam communicating with the interior is provided on the outer surface of the outer expansion sleeve (42).

6. The low-vibration and low-noise dual-axis drive mechanism according to claim 1, characterized in that: One end of the expansion column (3) is a conical portion and the other end is a round block portion, and an inner screw hole is provided at the center of the conical portion.

7. The low-vibration and low-noise dual-axis drive mechanism according to claim 6, characterized in that: The outer surface of one end of the fixing column (41) that penetrates into the outer expansion sleeve (42) is provided with an external thread, the fixing column (41) cooperates with the inner threaded hole, the outer surface of the tapered portion of the expansion column (3) is consistent with the inner surface of the outer expansion sleeve (42), and the rubber ring (5) is provided with evenly distributed deformation circular holes.

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