C-shaft gear back clearance adjusting mechanism

Abstract

The utility model relates to the technical field of gear back clearance adjustment, in particular to a C-axis gear back clearance adjusting mechanism which comprises a box body, a flange plate located on the top face of the box body, a first gear, a second gear and a servo motor, the first gear is in linkage with the flange plate and meshed with the second gear, the second gear is installed on an output shaft of the servo motor, the servo motor is fixedly installed on the servo motor installation plate, and the servo motor installation plate is installed on a side plate of the gearbox. A first adjusting piece for adjusting the distance between the servo motor mounting plate and the first gear is arranged at the position, corresponding to the servo motor mounting plate, of the box body, so that the gap between the first gear and the second gear is adjusted; and a second adjusting piece for adjusting the inclination angle of the servo motor mounting plate relative to the side plate is arranged on the servo motor mounting plate so as to adjust the parallelism of the axis of the first gear and the axis of the second gear. The device is simple in structure, can complete dynamic adjustment without disassembling parts, and is high in practicability.

Description

Technical Field

[0001] This utility model relates to the field of gear backlash adjustment technology, and in particular to a C-axis gear backlash adjustment mechanism. Background Technology

[0002] In a five-axis CNC machining center, the C-axis, as a key functional unit for rotational motion around the Z-axis, directly affects the machining quality of complex curved surfaces due to its transmission accuracy. Existing technologies generally employ a large gear-small gear meshing transmission structure, where the large gear is linked to a flange, and the small gear is driven by a servo motor. During the assembly of the C-axis in a five-axis machining center, precise control of the meshing clearance between the large and small gears, as well as the parallelism of their axes, is crucial. Existing technologies commonly use shim sets or eccentric sleeve structures, which suffer from cumbersome adjustment procedures and require repeated disassembly and assembly. This paper proposes a C-axis gear backlash adjustment mechanism to address these problems in existing technologies. Utility Model Content

[0003] The purpose of this utility model is to provide a C-axis gear backlash adjustment mechanism to solve the problem that the existing technology generally uses shim group adjustment or eccentric sleeve structure, which has cumbersome adjustment steps and requires repeated disassembly and assembly.

[0004] The technical solution of this utility model is: a C-axis gear backlash adjustment mechanism, including a housing, a flange located on the top surface of the housing, and a first gear, a second gear, and a servo motor installed inside the housing; the first gear is linked to the flange and meshes with the second gear, and the second gear is installed on the output shaft of the servo motor, characterized in that: the servo motor is fixedly installed on a servo motor mounting plate, and the servo motor mounting plate is installed on the side plate of the gearbox; a first adjusting member is provided on the housing corresponding to the position of the servo motor mounting plate to adjust the distance between the servo motor mounting plate and the first gear, thereby adjusting the gap between the first gear and the second gear; a second adjusting member is provided on the servo motor mounting plate to adjust the tilt angle of the servo motor mounting plate relative to the side plate, thereby adjusting the parallelism of the axes of the first gear and the second gear.

[0005] Preferably, the first adjusting component is a screw plug that penetrates the housing and is screwed onto the housing via threads, and the head of the screw plug entering the housing can abut against the servo motor mounting plate.

[0006] Preferably, the second adjusting component consists of multiple anchor screws installed at the four corners of the servo motor mounting plate, and the servo motor mounting plate has multiple anchor screw holes through it.

[0007] Preferably, the servo motor mounting plate has mounting holes for the second gear and the servo motor output shaft to pass through, and servo motor mounting screw holes are also provided on the servo motor mounting plate; the servo motor is fixed to the servo motor mounting plate by screwing screws into the servo motor mounting screw holes.

[0008] Preferably, there are two screw plugs, and the two screw plugs are symmetrically arranged above and below each other with the horizontal centerline of the servo motor mounting plate as the line of symmetry.

[0009] Preferably, the servo motor mounting plate has multiple first through holes, and the side plate has multiple first screw holes corresponding to the multiple first through holes. The servo motor mounting plate is fixed to the side plate by first screws passing through the first through holes and being screwed into the first screw holes.

[0010] The diameter of the first screw is smaller than the diameter of the first through hole.

[0011] Preferably, the top surface of the housing is provided with an oil injection hole for injecting lubricating oil into the gearbox, and the oil injection hole is fitted with a plug by a thread.

[0012] Preferably, an oil immersion lens for observation is provided on the side of the housing.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This utility model discloses a C-axis gear backlash adjustment mechanism, comprising a housing, a flange on the top surface of the housing, and a first gear, a second gear, and a servo motor installed inside the housing. By screwing the first and second screw plugs into the housing, the first and second screw plugs abut against the side wall of the servo motor mounting plate, pushing the servo motor mounting plate closer to the first gear. Since the servo motor is fixed on the servo motor mounting plate, and the second gear is mounted on the output shaft of the servo motor, the backlash between the first and second gears is reduced. By screwing the set-off screws in the set-off screw holes, the multi-angle tilt of the servo motor mounting plate relative to the side plate of the gearbox is adjusted, thereby achieving parallelism of the axes of the first and second gears. This utility model has a simple structure and can complete dynamic adjustment without disassembling any parts, making it highly practical. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of the C-axis gear backlash adjustment mechanism described in this utility model;

[0017] Figure 2 for Figure 1 Front view;

[0018] Figure 3 for Figure 1 The right view.

[0019] The components are: 1. Housing, 2. Flange, 3. First gear, 4. Second gear, 5. Servo motor mounting plate, 6. Side plate, 7. First screw plug, 8. Second screw plug, 9. Anchor screw hole, 10. Servo motor mounting screw hole, 11. First through hole, 12. Oil filling hole, 13. Oil sight glass. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments:

[0021] like Figure 1 , Figure 2 As shown, a C-axis gear backlash adjustment mechanism includes a housing 1, a flange 2 located on the top surface of the housing 1, and a first gear 3, a second gear 4, and a servo motor installed inside the housing 1. The first gear 3 is linked to the flange 2 and meshes with the second gear 4. The second gear 4 is mounted on the output shaft of the servo motor. The servo motor is fixedly mounted on a servo motor mounting plate 5, which is mounted on a side plate 6 of the gearbox. A first adjusting element is provided on the housing 1 at a position corresponding to the servo motor mounting plate 5 to adjust the distance between the servo motor mounting plate 5 and the first gear 3, thereby adjusting the gap between the first gear 3 and the second gear 4. A second adjusting element is provided on the servo motor mounting plate 5 to adjust the tilt angle of the servo motor mounting plate 5 relative to the side plate 6, thereby adjusting the parallelism of the axes of the first gear 3 and the second gear 4.

[0022] The first adjusting component is a threaded plug that penetrates the housing 1 and is screwed onto the housing 1. The head of the plug, inside the housing 1, abuts against the servo motor mounting plate 5. There are two plugs, symmetrically positioned about the horizontal centerline of the servo motor mounting plate 5. Figure 3As shown, in this embodiment, the two plugs are a first plug 7 located at the top and a second plug 8 located below the first plug 7. Plugs are used instead of ordinary screws because they provide a good seal, eliminating the risk of oil leakage from the housing 1. By screwing the first plug 7 and the second plug 8 into the housing 1, they press against the side wall of the servo motor mounting plate 5, pushing the servo motor mounting plate 5 closer to the first gear 3. Since the servo motor is fixed on the servo motor mounting plate 5 and the second gear 4 is mounted on the output shaft of the servo motor, this reduces the gap between the first gear 3 and the second gear 4. Simultaneously, the first plug 7 can be screwed deeper into the housing 1 while the second plug 8 is screwed shallower, or vice versa, allowing for multi-directional adjustment of the first gear 3. Furthermore, the plug-pressing structure forms a mechanical self-locking mechanism, effectively resisting the vibration and displacement of the servo motor mounting plate 5 during transmission and maintaining a long-term stable backlash value.

[0023] The second adjusting component consists of multiple retaining screws installed at the four corners of the servo motor mounting plate 5, with multiple retaining screw holes 9 correspondingly drilled through the servo motor mounting plate 5. In this embodiment, by screwing the retaining screws into the retaining screw holes 9, the multi-angle tilt of the servo motor mounting plate 5 relative to the side plate 6 of the gearbox is adjusted, thereby achieving the parallelism of the axes of the first gear 3 and the second gear 4; when the retaining screws are screwed into the retaining screw holes 9 and the head of the retaining screws abuts against the side plate 6, and are continuously screwed in, the servo motor mounting plate 5 moves away from the side plate 6; when the retaining screws are screwed out of the retaining screw holes 9 and the head of the retaining screws abuts against the side plate 6, and are continuously screwed out, the servo motor mounting plate 5 moves closer to the side plate 6.

[0024] The servo motor mounting plate 5 has mounting holes for the second gear 4 and the servo motor output shaft to pass through, and servo motor mounting screw holes 10 are also provided on the servo motor mounting plate 5. The servo motor is fixed to the servo motor mounting plate 5 by screwing screws into the servo motor mounting screw holes 10.

[0025] The servo motor mounting plate 5 has multiple through holes 11, and the side plate 6 has multiple screw holes corresponding to the through holes 11. The servo motor mounting plate 5 is fixed to the side plate 6 by screwing the first screw through the through hole 11 into the screw hole. The diameter of the first screw is smaller than the diameter of the first through hole 11, so that when the servo motor mounting plate 5 is pre-installed on the side plate 6 by the first screw (i.e., the first screw is not tightened and the servo motor mounting plate 5 can still move), the position of the servo motor mounting plate 5 can still be adjusted by the pressure of the first screw plug 7 and the second screw plug 8. Considering the machining error, the diameter of the first through hole 11 is sufficient to allow the servo motor mounting plate 5 to move a distance of 1 mm.

[0026] The top surface of the housing 1 is provided with an oil filling hole 12 for injecting lubricating oil into the gearbox, and the oil filling hole 12 is fitted with a plug by threads. An oil sight glass 13 is provided on the side of the housing 1 for observation, so as to observe the oil level and oil quality, and ensure the normal operation of the equipment and timely maintenance.

[0027] In this utility model, a C-axis gear backlash adjustment mechanism is described. During C-axis assembly, the servo motor mounting plate 5 is first pre-installed on the side plate 6 of the gearbox using the first screw (i.e., the first screw is not tightened, and the servo motor mounting plate 5 can still move). Then, the first gear 3 on the output shaft of the servo motor passes through the mounting hole on the servo motor mounting plate 5, and the servo motor is fixedly mounted on the servo motor mounting plate 5. The first screw plug 7 and the second screw plug 8 are screwed to abut against the servo motor mounting plate 5 to adjust the distance between the first gear 3 and the second gear 4. The anti-slip screw is screwed to adjust the parallelism of the axes of the first gear 3 and the second gear 4.

[0028] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A C-axis gear backlash adjustment mechanism, comprising a housing, a flange located on the top surface of the housing, and a first gear, a second gear, and a servo motor installed inside the housing; the first gear is linked to the flange and meshes with the second gear, the second gear being mounted on the output shaft of the servo motor, characterized in that: The servo motor is fixedly mounted on the servo motor mounting plate, which is mounted on the side plate of the gearbox. A first adjusting component is provided on the gearbox corresponding to the position of the servo motor mounting plate to adjust the distance between the servo motor mounting plate and the first gear, thereby adjusting the gap between the first gear and the second gear. A second adjusting component is provided on the servo motor mounting plate to adjust the tilt angle of the servo motor mounting plate relative to the side plate, thereby adjusting the parallelism of the axes of the first gear and the second gear.

2. The C-axis gear backlash adjustment mechanism according to claim 1, characterized in that: The first adjusting component is a screw plug that penetrates the housing and is screwed onto the housing via threads. The head of the screw plug, which enters the housing, can abut against the servo motor mounting plate.

3. The C-axis gear backlash adjustment mechanism according to claim 1, characterized in that: The second adjusting component consists of multiple anchor screws installed at the four corners of the servo motor mounting plate, and the servo motor mounting plate has multiple anchor screw holes through it.

4. The C-axis gear backlash adjustment mechanism according to claim 1, characterized in that: The servo motor mounting plate has mounting holes for the second gear and the servo motor output shaft to pass through, and servo motor mounting screw holes are also provided on the servo motor mounting plate. The servo motor is fixed to the servo motor mounting plate by screwing screws into the servo motor mounting screw holes.

5. The C-axis gear backlash adjustment mechanism according to claim 2, characterized in that: The number of the screw plugs is two, and the two screw plugs are symmetrically arranged above and below each other with the horizontal center line of the servo motor mounting plate as the line of symmetry.

6. The C-axis gear backlash adjustment mechanism according to claim 1, characterized in that: The servo motor mounting plate has multiple first through holes, and the side plate has multiple first screw holes corresponding to the multiple first through holes. The servo motor mounting plate is fixed to the side plate by screwing the first screws through the first through holes and into the first screw holes. The diameter of the first screw is smaller than the diameter of the first through hole.

7. The C-axis gear backlash adjustment mechanism according to claim 1, characterized in that: The top surface of the housing is provided with an oil injection hole for injecting lubricating oil into the gearbox, and the oil injection hole is fitted with a plug by threads.

8. The C-axis gear backlash adjustment mechanism according to claim 1, characterized in that: An oil immersion mirror for observation is provided on the side of the box.

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