Improved gear transmission structure

Abstract

The utility model discloses an improved gear transmission structure which comprises a fixed support and a driving motor fixedly installed on the fixed support, and a power output shaft of the driving motor is provided with a first gear. A second gear is rotationally mounted on the fixed support and beside the driving motor, and the second gear is meshed with the first gear; the improved gear transmission structure further comprises a third gear and an elastic piece. The third gear is meshed with the second gear. The elastic piece is located between the fixed support and the third gear and elastically abuts against the end face of the third gear and the fixed support. By means of the structural design, the gear shifting mechanism has the advantages of being novel in structural design, and capable of effectively reducing gear meshing clearances and effectively improving displacement accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission structures, in particular to an improved gear transmission structure. Background Art

[0002] As a common mechanical transmission structure, gear transmission structure is widely used in actuator drive structure.

[0003] For the gear transmission structure, its basic structure includes a motor, a driving gear, and a driven gear. The driving gear is installed and fastened to the power output shaft of the motor, and the driving gear is meshed with the driven gear. For the gearbox structure that needs to achieve multi-speed change, a number of intermediate gears are also installed between the driving gear and the driven gear.

[0004] It should be pointed out that since the driving gear and the driven gear are respectively installed on the corresponding mounting seats through the gear shaft, and there is a meshing gap between the driving gear and the driven gear; in addition, as the driving gear and the driven gear continue to wear, the meshing gap between the two will also increase accordingly. When the driven gear drives the corresponding end effector to move, the above-mentioned meshing gap will cause the end effector to have displacement shaking problems; for pan-tilt products with higher displacement accuracy requirements, the above-mentioned meshing gap will affect the displacement accuracy of the end effector. Utility Model Content

[0005] The purpose of the utility model is to provide an improved gear transmission structure in view of the deficiencies of the prior art. The improved gear transmission structure has a novel design and can effectively reduce the gear meshing clearance, thereby effectively improving the displacement accuracy.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions.

[0007] An improved gear transmission structure includes a fixed support, a driving motor fixedly mounted on the fixed support, and a power output shaft of the driving motor is equipped with a first gear;

[0008] The fixed support is rotatably mounted with a second gear beside the driving motor, and the second gear is meshed with the first gear;

[0009] The improved gear transmission structure also includes a third gear and a spring sheet, the third gear is meshed with the second gear; the spring sheet is located between the fixed support and the third gear, and the spring sheet elastically abuts against the end face of the third gear and the fixed support respectively.

[0010] Wherein, the fixed support is provided with an auxiliary bracket, and the third gear is rotatably mounted on the auxiliary bracket through the optical axis;

[0011] A through hole is opened in the middle of the spring sheet, and the spring sheet is sleeved on the periphery of the optical axis through the through hole. The spring sheet is located between the third gear and the auxiliary bracket, and the spring sheet elastically abuts against the end surface of the third gear and the auxiliary bracket respectively.

[0012] Wherein, a gasket is arranged between the spring piece and the end surface of the third gear, and the gasket is sleeved on the periphery of the optical axis.

[0013] Wherein, the driving motor is a stepping motor.

[0014] Compared with the prior art, the utility model has the following beneficial effects, specifically: for the spring sheet located between the end face of the third gear and the fixed support, since the spring sheet is elastically in contact with the third gear and the fixed support respectively, the spring sheet will cause a friction force to be generated between the third gear and the fixed support, and the friction force will cause the third gear to produce a damping effect on the second gear. When the first gear drives the second gear to rotate and there is a meshing gap between the first gear and the second gear, the damping effect can effectively reduce the shaking of the second gear due to the gap, thereby improving the displacement accuracy of the second gear. Therefore, the improved gear transmission structure of the utility model has the advantages of novel structural design, and can effectively reduce the gear meshing gap and effectively improve the displacement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below with reference to the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 A partial enlarged schematic diagram of the "A" position shown.

[0018] Figure 3 It is a partial exploded schematic diagram of the utility model.

[0019] exist Figures 1 to 3 Included are:

[0020] 1-driving motor; 2-first gear; 3-second gear; 4-third gear; 5-spring; 51-through hole; 6-auxiliary bracket; 7-optical axis; 8-gasket. DETAILED DESCRIPTION

[0021] The present invention will be described below in conjunction with specific implementation methods.

[0022] Embodiment 1, as Figures 1 to 3As shown, an improved gear transmission structure includes a fixed support (not shown in the figure), a driving motor 1 fastened to the fixed support, and a first gear 2 is installed on the power output shaft of the driving motor 1.

[0023] Among them, Figures 1 to 3 As shown, a second gear 3 is rotatably mounted on a fixed support beside the driving motor 1 , and the second gear 3 is meshed with the first gear 2 .

[0024] Furthermore, the improved gear transmission structure also includes a third gear 4 and a spring plate 5, and the third gear 4 is meshed with the second gear 3; the spring plate 5 is located between the fixed support and the third gear 4, and the spring plate 5 elastically abuts against the end face of the third gear 4 and the fixed support respectively.

[0025] During the operation of the improved gear transmission structure of the first embodiment, the driving motor 1 drives the first gear 2 to rotate. Since the first gear 2 is meshed with the second gear 3, the rotating first gear 2 drives the second gear 3 to rotate synchronously; and since the second gear 3 is meshed with the third gear 4, the rotating second gear 3 will drive the third gear 4 to rotate synchronously.

[0026] It should be pointed out that, for the spring piece 5 located between the end face of the third gear 4 and the fixed support, since the spring piece 5 elastically abuts against the third gear 4 and the fixed support respectively, the spring piece 5 will cause a friction force to be generated between the third gear 4 and the fixed support. The above friction force will cause the third gear 4 to have a damping effect on the second gear 3. When the first gear 2 drives the second gear 3 to rotate and there is a meshing gap between the first gear 2 and the second gear 3, the above damping effect can effectively reduce the problem of shaking of the second gear 3 due to the gap, thereby improving the displacement accuracy of the second gear 3.

[0027] In summary, it can be seen that, through the above structural design, the improved gear transmission structure of the first embodiment has the advantages of novel structural design, and can effectively reduce the gear meshing clearance and effectively improve the displacement accuracy.

[0028] Embodiment 2, as Figures 1 to 3 As shown, the difference between the second embodiment and the first embodiment is that the fixed support is provided with an auxiliary bracket 6 , and the third gear 4 is rotatably mounted on the auxiliary bracket 6 through the optical axis 7 .

[0029] A through hole 51 is opened in the middle of the spring sheet 5, and the spring sheet 5 is sleeved on the periphery of the optical axis 7 through the through hole 51. The spring sheet 5 is located between the third gear 4 and the auxiliary bracket 6, and the spring sheet 5 elastically abuts against the end surface of the third gear 4 and the auxiliary bracket 6 respectively.

[0030] Embodiment three, as Figure 2 and Figure 3As shown, the difference between the third embodiment and the second embodiment is that a gasket 8 is installed between the spring piece 5 and the end surface of the third gear 4 , and the gasket 8 is sleeved on the periphery of the optical axis 7 .

[0031] By adding the gasket 8 structure, the third embodiment can prevent the spring sheet 5 from directly contacting the third gear 4 , thereby preventing the third gear 4 from being worn due to contact with the spring sheet 5 .

[0032] Embodiment 4: The difference between the embodiment 4 and the embodiment 1 is that the driving motor 1 is a stepping motor.

[0033] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An improved gear transmission structure, comprising a fixed support, a driving motor (1) fixedly mounted on the fixed support, and a power output shaft of the driving motor (1) being provided with a first gear (2); A second gear (3) is rotatably mounted on a fixed support beside the driving motor (1), and the second gear (3) is meshed with the first gear (2); Features: The improved gear transmission structure further comprises a third gear (4) and a spring sheet (5), wherein the third gear (4) is meshed with the second gear (3); the spring sheet (5) is located between the fixed support and the third gear (4), and the spring sheet (5) is elastically in contact with the end surface of the third gear (4) and the fixed support respectively.

2. The improved gear transmission structure according to claim 1, characterized in that: The fixed support is provided with an auxiliary bracket (6), and the third gear (4) is rotatably mounted on the auxiliary bracket (6) via an optical axis (7); A through hole (51) is provided in the middle of the spring sheet (5), and the spring sheet (5) is sleeved on the periphery of the optical axis (7) through the through hole (51). The spring sheet (5) is located between the third gear (4) and the auxiliary bracket (6), and the spring sheet (5) is elastically abutted against the end surface of the third gear (4) and the auxiliary bracket (6), respectively.

3. An improved gear transmission structure according to claim 2, characterized in that: A gasket (8) is arranged between the spring sheet (5) and the end surface of the third gear (4), and the gasket (8) is sleeved on the periphery of the optical axis (7).

4. The improved gear transmission structure according to claim 1, characterized in that: The driving motor (1) is a stepping motor.

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