阅读说明：本技术 消隙齿轮机构 (Anti-backlash gear mechanism ) 是由 杨春涛 胡国庆 齐欢欢 喻清华 文梦蝶 于 2021-10-12 设计创作，主要内容包括：本发明公开了一种消隙齿轮机构,其特征在于；轴(3)一端分别套上压簧(4)、消隙齿轮B(2)、消隙齿轮A(1)放上平垫(5)拧入螺栓(6)连接,消隙齿轮A(1)上设置有啮合斜齿(7),与消隙齿轮B(2)上设置有啮合斜齿槽(8),啮合斜齿(7)卡入啮合斜齿槽(8)啮合。本发明便于安装,可传递一定负荷,可靠性高。(The invention discloses an anti-backlash gear mechanism, which is characterized in that; one end of the shaft (3) is respectively sleeved with a pressure spring (4), an anti-backlash gear B (2) and an anti-backlash gear A (1), an upper flat pad (5) is placed, and is screwed into a bolt (6) for connection, the anti-backlash gear A (1) is provided with a meshing helical tooth (7), the anti-backlash gear B (2) is provided with a meshing helical tooth groove (8), and the meshing helical tooth (7) is clamped into the meshing helical tooth groove (8) for meshing. The invention is convenient to install, can transmit certain load and has high reliability.)

1. An anti-backlash gear mechanism is characterized in that; one end of the shaft (3) is respectively sleeved with a pressure spring (4), an anti-backlash gear B (2) and an anti-backlash gear A (1), an upper flat pad (5) is placed, and is screwed into a bolt (6) for connection, the anti-backlash gear A (1) is provided with a meshing helical tooth (7), the anti-backlash gear B (2) is provided with a meshing helical tooth groove (8), and the meshing helical tooth (7) is clamped into the meshing helical tooth groove (8) for meshing.

2. The anti-backlash gear mechanism of claim 1, wherein; the meshing helical teeth (7) are angular protrusions with one vertical side and the other inclined side.

3. The anti-backlash gear mechanism of claim 1, wherein; the meshing skewed tooth groove (8) is an angular groove with one vertical side and the other oblique side.

Technical Field

The invention belongs to the technical field of aircrafts, and particularly relates to an anti-backlash gear mechanism.

Background

The anti-backlash gear mechanism is arranged in the control transmission system, and the output end of the anti-backlash gear mechanism is connected with a rotary differential transformer type angular displacement sensor (RVDT) to realize the high-precision transmission of the position information of the throttle lever. The electric signal of the throttle lever position is accurately read through the RVDT, the electric signal is transmitted to the engine controller, and the engine controller transmits the instruction to the executing mechanism, so that the function of automatically controlling the throttle lever with high precision is realized. In the traditional accelerator platform control transmission system, the adopted backlash eliminating gear mechanism is a double-gear piece and tension spring combined backlash eliminating method, the backlash caused by the error of the gear can be eliminated by the eliminating method, and the backlash caused by the gear abrasion can also be properly eliminated, but the installation and the transmission of certain load are inconvenient due to the limitation of the size of the spring, the tension spring becomes loose after the gear is abraded, and the reliability is low.

Disclosure of Invention

The invention aims to overcome the defects and provide an anti-backlash gear mechanism which is convenient to mount, can transmit a certain load and has high reliability.

The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:

the invention discloses an anti-backlash gear mechanism, which is characterized in that a gear body is arranged on the gear body; one end of the shaft is respectively sleeved with a pressure spring, a clearance eliminating gear B and a clearance eliminating gear A, an upper flat pad is placed on the clearance eliminating gear A, the clearance eliminating gear A is screwed into a bolt for connection, meshing helical teeth are arranged on the clearance eliminating gear A, meshing helical tooth grooves are arranged on the clearance eliminating gear B, and the meshing helical teeth are clamped into the meshing helical tooth grooves for meshing.

The meshing helical teeth are angular protrusions with one side vertical and the other side inclined.

The meshing skewed tooth groove is an angular groove with one vertical side and the other inclined side.

Compared with the prior art, the invention has obvious beneficial effects, and the technical scheme shows that: the invention is connected by a pressure spring, an anti-backlash gear B and an anti-backlash gear A which are respectively sleeved on one end of a shaft, an upper flat pad is placed on the anti-backlash gear A, and a screw bolt is screwed in the anti-backlash gear A, meshing helical teeth are arranged on the anti-backlash gear A, and the meshing helical teeth are clamped into the meshing helical teeth grooves for meshing. When the anti-backlash gear A and the anti-backlash gear are assembled, the meshing helical teeth and the meshing helical tooth grooves are meshed, and meanwhile, under the action of the meshing helical teeth, the two anti-backlash gears A and the anti-backlash gear B rotate relatively along the helical tooth surface, so that the backlash meshed with the mating gear is eliminated. When the anti-backlash gear A and the anti-backlash gear B are assembled, the meshing helical teeth and the meshing helical tooth grooves are tightly attached together through locking of the bolts, and then the pre-tightening force of gear meshing is obtained through the spring. Finally, the anti-backlash gear A and the anti-backlash gear B rotate relatively to meet the requirement, the backlash of the gear pair is filled, and the backlash-free meshing of the gears is realized. The installation is convenient, certain load can be transmitted, and the reliability is high.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1A-A;

FIG. 3 is an enlarged view of FIG. 1 a;

FIG. 4 is a front view of an anti-backlash gear A and an anti-backlash gear B of the present invention;

FIG. 5 is a cross-sectional view of FIG. 4B-B;

FIG. 6 is a schematic structural view of an anti-backlash gear A and meshing helical teeth of the present invention;

FIG. 7 is a schematic structural view of the anti-backlash gear B and the meshing skewed tooth slot of the present invention.

The labels in the figure are:

1. a backlash eliminating gear A; 2. an anti-backlash gear B; 3. a shaft; 4. a pressure spring; 5. flattening the cushion; 6. a bolt 7, meshing helical teeth; 8. engaging the skewed tooth slot.

Detailed Description

The invention is further described with reference to the following drawings and detailed description.

The invention discloses an anti-backlash gear mechanism, which is characterized in that a gear body is arranged on the gear body; one end of the shaft 3 is respectively sleeved with a pressure spring 4, an anti-backlash gear B2 and an anti-backlash gear A1, an upper flat pad 5 is placed, and the upper flat pad is screwed into a bolt 6 for connection, an engaging helical tooth 7 is arranged on the anti-backlash gear A1, an engaging helical tooth groove 8 is arranged on the anti-backlash gear B2, and the engaging helical tooth 7 is clamped into the engaging helical tooth groove 8 for engagement.

The engaging helical teeth 7 are angular protrusions with one side vertical and the other side inclined.

The engaging skewed tooth slot 8 is an angular groove with one side vertical and the other side inclined.

When in use; when the anti-backlash gear A1 is assembled with the anti-backlash gear 2, the meshing helical teeth 7 and the meshing helical tooth grooves 8 are meshed, meanwhile, under the action of the meshing helical teeth 7, the two anti-backlash gears A1 and the anti-backlash gear B2 rotate relatively along the helical tooth surfaces, the backlash meshed with the mating gears is eliminated, referring to fig. 5-7, when the anti-backlash gear A1 is assembled with the anti-backlash gear B2, the meshing helical teeth 7 and the meshing helical tooth grooves 8 are tightly attached together through locking of the bolts 6, and then the pre-tightening force of gear meshing is obtained through the springs 4, referring to fig. 2. When the anti-backlash gear A1 and the anti-backlash gear B2 rotate relatively to each other to fill up the backlash of the gear pair.