Gear drive adjustment mechanism

Abstract

This invention discloses a gear transmission adjustment mechanism, including a fixed gear, a movable gear, and a mounting base plate. The fixed gear is locked onto the gear shaft and fixed to the mounting base plate by a large nut. The movable gear is mounted on a sliding bearing and a slider, which can move along a positioning block. An adjusting bolt is provided on the mounting base plate; rotating the adjusting bolt drives the slider to move the movable gear along the line connecting the centers of the two gears, thereby adjusting the meshing clearance and locking it in place. This invention can precisely adjust the gear meshing clearance to the optimal range, reducing the requirements for machining and assembly precision. It can also perform secondary calibration of the clearance after gear wear, eliminate transmission whistling and knocking noises, improve the NVH performance of the transmission system, and extend the service life of components.

Description

Technical Field

[0001] This invention relates to the field of gear transmission technology, and in particular to a gear transmission adjustment mechanism. Background Technology

[0002] With societal progress and the continuous improvement of people's living standards, the requirements for vehicle NVH (Noise, Vibration, and Harshness) are becoming increasingly stringent. Among these, gear transmission noise is one of the most common types of noise, frequently causing user complaints. Gear transmission mechanisms are the most common transmission components in engines, gearboxes, and vehicle chassis. When a pair of gears mesh, due to factors such as manufacturing precision and assembly precision, unacceptable whistling or knocking noises are often produced, which can lead to gear transmission failure in severe cases.

[0003] Gear meshing clearance is one of the main factors affecting the NVH performance of gear transmission. Generally, the meshing clearance is controlled between 0.05mm and 0.15mm. If the clearance is too small, it is easy to produce whistling and tooth surface meshing. If the clearance is too large, it will cause knocking noise and even lead to gear transmission failure.

[0004] Existing gear pairs have a fixed and non-adjustable meshing clearance after installation. This clearance is easily affected by assembly positioning, component deformation, and machining errors, leading to clearances that exceed the design range. If the clearance is substandard, only specially made gears or components requiring center distance adjustment can be replaced, resulting in high costs and long maintenance cycles. Therefore, this invention provides a transmission mechanism with a flexible adjustable gear meshing clearance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a gear transmission adjustment mechanism that can achieve precise adjustment of the center distance of the gear pair by adjusting the gear installation position, stabilize the meshing clearance within the optimal range, eliminate gear squealing and knocking noises, and reduce processing and assembly costs.

[0006] The technical problem to be solved by the present invention is achieved through the following technical solution:

[0007] A gear transmission adjustment mechanism includes a fixed gear, a movable gear, and a mounting base plate;

[0008] The fixed gear is locked onto the gear shaft by a large nut, the gear shaft is fixedly mounted on the mounting base plate, and the position of the fixed gear relative to the mounting base plate remains fixed;

[0009] The movable gear is mounted on a sliding bearing, which is mounted on a slider; the slider is mounted on a positioning block, which is locked and fixed to the mounting base plate by fixing bolts and limiting washers;

[0010] A fixing block is fixedly installed on the mounting base plate, and an adjusting bolt is threaded onto the fixing block. The end of the adjusting bolt abuts against the side end of the slider. The fixing block is provided with a locking nut for locking the adjusting bolt. Rotating the adjusting bolt can drive the slider, thereby causing the movable gear to move along the center line connecting the fixed gear and the movable gear, so as to adjust the meshing gap between the two.

[0011] Preferably, in the above technical solution, a limiting gap is provided between the limiting washer and the movable gear and the end face of the sliding bearing along the axial direction of the fixing bolt, and the size of the limiting gap is 0.2mm.

[0012] Preferably, in the above technical solution, an adjustment gap is provided between the slider and the positioning block, and the size of the adjustment gap is 1mm.

[0013] Preferably, in the above technical solution, the mounting base plate is provided with a guide groove and clearance space for the movement of the slider.

[0014] Preferably, in the above technical solution, the mounting base plate is provided with an oil passage inlet and an oil passage, the oil passage connecting the oil passage inlet and the sliding bearing to provide lubrication for the sliding bearing.

[0015] Preferably, in the above technical solution, the axial clearance between the inner hole of the positioning block and the fixing bolt on one side is 1.95mm.

[0016] The above-described technical solution of the present invention has the following beneficial effects:

[0017] (1) Reduce the requirements for gear installation and machining accuracy, improve production efficiency and reduce manufacturing costs;

[0018] (2) It can make secondary adjustments to the meshing clearance of gears that has increased after durable use, improve knocking noise, and enhance vehicle NVH performance;

[0019] (3) It has high adjustment accuracy and is easy to operate. Gap calibration can be completed without replacing parts. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0021] Figure 1 This is a front view of the gear transmission adjustment mechanism of the present invention;

[0022] Figure 2 This is a cross-sectional view of the gear transmission adjustment mechanism of the present invention;

[0023] Figure 3This is an axial view of the gear transmission adjustment mechanism of the present invention;

[0024] The diagram shows the following markings: 1-Fixing bolt; 2-Limiting washer; 3-Positioning block; 4-Slider; 5-Moving gear; 6-Locking nut; 7-Fixing block; 8-Sliding bearing; 9-Adjusting bolt; 10-Mounting base plate; 11-Large nut; 12-Fixing gear; 13-Gear shaft; 100-Limiting clearance; 200-Oil passage; 300-Adjusting clearance; 400-Oil passage inlet. Detailed Implementation

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0026] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, and the materials and reagents used are commercially available. Unless otherwise specified, the equipment used in the experiments is well known to those skilled in the art.

[0027] like Figure 1-3 As shown, the gear transmission adjustment mechanism of the present invention mainly includes: a fixed gear 12 and a movable gear 5. The movable gear 5 and the fixed gear 12 are respectively fixed on the mounting base plate 10. The mounting base plate 10 may be a different component. The adjustment mechanism of the present invention enables the movable gear 5 to move and be positioned precisely in the direction of the line connecting the centers of the gear pair.

[0028] The fixed gear 12 is locked onto the gear shaft 13 by a large nut 11. The gear shaft 13 is fixedly connected to the mounting base plate 10. The fixed gear 12 is fixed in position relative to the mounting base plate 10, serving as the reference component of the gear pair.

[0029] The movable gear 5 and the sliding bearing 8 are mounted on the slider 4, and the slider 4 is mounted on the outside of the positioning block 3. The positioning block 3 is fixed to the mounting base plate 10 by the positioning circle on its bottom surface and the positioning pin, and then locked and fixed by the fixing bolt 1 and the limiting washer 2. The center distance between the positioning block 3 and the fixed gear 12 is the theoretical design center distance of the gear pair.

[0030] Along the axial direction of the fixing bolt 1, a limiting gap 100 is provided between the limiting washer 2 and the end face of the movable gear 5 and the sliding bearing 8. The limiting gap 100 has a size of 0.2mm to ensure that the movable gear 5 can rotate freely.

[0031] The fixing block 7 is fixed to the mounting base plate 10 through the slot. By rotating the adjusting bolt 9 connected to the fixing block 7, the slider 4 can be moved along the line connecting the centers of the two gears, thereby making the center distance between the movable gear 5 and the fixed gear 12 adjustable. After the adjustment is completed, the adjusting bolt 9 is locked to the fixing block 7 by the locking nut 6.

[0032] There is a 1mm adjustment gap 300 between the slider 4 and the positioning block 3 to ensure that the movable gear 5 moves within the range of -1mm to +1mm from the theoretical center position. At the same time, the slider 4 is designed with guide grooves and movement clearance space on the mounting base plate 10.

[0033] To ensure lubrication of the sliding bearing 8, high-pressure lubricating oil is introduced into the oil passage 200 through the oil passage inlet 400 on the mounting base plate 10, wherein the axial clearance between the inner hole of the positioning block 3 and the fixing bolt 1 on one side is 1.95mm.

[0034] Installation and adjustment of the gear transmission adjustment mechanism in this application:

[0035] 1. Installation Process

[0036] First, lock the fixed gear 12 onto the gear shaft 13 using the large nut 11, and then fix the gear shaft 13 onto the mounting base plate 10. Then, fit the movable gear 5 and the sliding bearing 8 onto the slider 4, and then fit the slider 4 onto the positioning block 3. Fix the positioning block 3 onto the mounting base plate 10 using the bottom positioning circle, positioning pin, fixing bolt 1, and limiting washer 2. Then, snap the fixing block 7 onto the mounting base plate 10 using the slot, and screw the adjusting bolt 9 into the fixing block 7 so that its end abuts against the slider 4 to complete the overall assembly.

[0037] 2. Gap Adjustment Procedure

[0038] Rotate the adjusting bolt 9. The adjusting bolt 9 pushes the slider 4 to move along the line connecting the center of the fixed gear 12 and the movable gear 5. The slider 4 synchronously drives the movable gear 5 to move, thereby adjusting the center distance between the movable gear 5 and the fixed gear 12, and adjusting the gear meshing clearance to the optimal range of 0.05mm-0.15mm.

[0039] 3. Locking and fixing

[0040] After the gear meshing clearance is adjusted to the correct position, tighten the locking nut 6 to lock the adjusting bolt 9 and the fixing block 7 in place, so as to prevent the adjusting bolt 9 from loosening during use and causing the clearance to shift. High-pressure lubricating oil flows into the oil passage 200 through the oil passage inlet 400 to continuously lubricate the sliding bearing 8 and ensure the stable operation of the mechanism.

[0041] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various different choices and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A gear transmission adjustment mechanism, characterized in that, Includes a fixed gear (12), a movable gear (5), and a mounting base plate (10); The fixed gear (12) is locked onto the gear shaft (13) by a large nut (11). The gear shaft (13) is fixedly installed on the mounting base plate (10). The fixed gear (12) remains fixed relative to the mounting base plate (10). The movable gear (5) is mounted on the sliding bearing (8), and the sliding bearing (8) is mounted on the slider (4); the slider (4) is mounted on the positioning block (3), and the positioning block (3) is locked and fixed to the mounting base plate (10) by the fixing bolt (1) and the limiting washer (2); A fixing block (7) is fixedly installed on the mounting base plate (10). An adjusting bolt (9) is threadedly connected to the fixing block (7). The end of the adjusting bolt (9) abuts against the side end of the slider (4). A locking nut (6) is provided on the fixing block (7) to lock the adjusting bolt (9). Rotating the adjusting bolt (9) can drive the slider (4) to move the movable gear (5) along the center line connecting the fixed gear (12) and the movable gear (5), thereby realizing the adjustment of the meshing gap between the two.

2. The gear transmission adjustment mechanism according to claim 1, characterized in that, Along the axial direction of the fixing bolt (1), a limiting gap (100) is provided between the limiting washer (2) and the end face of the movable gear (5) and the sliding bearing (8), and the size of the limiting gap (100) is 0.2mm.

3. The gear transmission adjustment mechanism according to claim 1, characterized in that, An adjustment gap (300) is provided between the slider (4) and the positioning block (3), and the size of the adjustment gap (300) is 1mm.

4. The gear transmission adjustment mechanism according to claim 1, characterized in that, The mounting base plate (10) is provided with a guide groove and clearance space for the movement of the slider (4).

5. The gear transmission adjustment mechanism according to claim 1, characterized in that, The mounting base plate (10) is provided with an oil passage inlet (400) and an oil passage (200). The oil passage (200) connects the oil passage inlet (400) and the sliding bearing (8) to provide lubrication for the sliding bearing (8).

6. The gear transmission adjustment mechanism according to claim 1, characterized in that, The axial clearance between the inner hole of the positioning block (3) and the fixing bolt (1) on one side is 1.95mm.

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