阅读说明：本技术 一种斜齿轮消隙机构及其消隙方法 (Helical gear clearance eliminating mechanism and clearance eliminating method thereof ) 是由 多松 于洋 成占华 张明 王振宇 于 2019-11-04 设计创作，主要内容包括：本发明属于齿轮传统技术领域,具体涉及一种斜齿轮消隙机构,其包括主动轴、从动轴、从动斜齿轮,所述主动轴上同轴设有与从动斜齿轮啮合的固定斜齿轮和浮动斜齿轮；所述固定斜齿轮和浮动斜齿轮之间设有调整垫,所述浮动斜齿轮端面穿设过数个紧固螺钉以与调整垫、固定斜齿轮串接。本发明还提供了斜齿轮的消隙方法,在重载荷工况下,能达到高精度、刚性强,拆卸相对方便的效果。(The invention belongs to the technical field of traditional gears, and particularly relates to a helical gear clearance eliminating mechanism which comprises a driving shaft, a driven shaft and a driven helical gear, wherein a fixed helical gear and a floating helical gear which are meshed with the driven helical gear are coaxially arranged on the driving shaft; an adjusting pad is arranged between the fixed helical gear and the floating helical gear, and the end face of the floating helical gear penetrates through a plurality of fastening screws to be connected in series with the adjusting pad and the fixed helical gear. The invention also provides a gap eliminating method of the bevel gear, which can achieve the effects of high precision, strong rigidity and relative convenience in disassembly under the heavy load working condition.)

1. the utility model provides a helical gear backlash eliminating mechanism, includes driving shaft (1), driven shaft (7), driven helical gear (6), its characterized in that: a fixed helical gear (3) and a floating helical gear (4) which are meshed with the driven helical gear (6) are coaxially arranged on the driving shaft (1);

an adjusting pad (8) is arranged between the fixed helical gear (3) and the floating helical gear (4), and a plurality of fastening screws (9) are arranged on the end face of the floating helical gear (4) in a penetrating mode to be connected in series with the adjusting pad (8) and the fixed helical gear (3).

2. The helical gear backlash elimination mechanism of claim 1, wherein: the driving shaft (1) is a spline shaft, and a positioning pad (2) is arranged at a shaft shoulder of the driving shaft to ensure that the end face of the fixed helical gear (3) is aligned with the end face of the driven helical gear (6).

3. A backlash eliminating method of the helical gear backlash eliminating mechanism according to claim 2, comprising the steps of:

s1) processing a clearance groove at the shaft shoulder of the driving shaft (1), installing the positioning pad (2) at the clearance groove, and rotating a certain angle to enable the spline between the positioning pad (2) and the driving shaft (1) to be staggered;

s2) fixedly assembling the fixed bevel gear (3) on the driving shaft (1) by abutting against the positioning pad (2);

s3), the floating helical gear (4) is arranged on the driving shaft (1) in a penetrating mode, the adjusting screw (5) is screwed uniformly until the end faces of the floating helical gear (4) and the fixed helical gear (3) are meshed with the left tooth face and the right tooth face of the driven helical gear (6) respectively, and the distance L between the floating helical gear (4) and the fixed helical gear (3) is measured;

s4), detaching the floating bevel gear (4), assembling an adjusting pad (8) with the thickness of L +0.02 on the driving shaft (1), and then connecting and fixing the floating bevel gear (4), the adjusting pad (8) and the fixed bevel gear (3) in series by a fastening screw (9).

4. The backlash elimination method according to claim 3, wherein in said step S3), said number of fastening screws (9) is N, and said distance L is determined by:

s3.1) after the floating screw (5) is adjusted, firstly measuring the distance L1 between the floating bevel gear (4) and the fixed bevel gear (3);

s3.2) after the driving shaft (1) rotates for 360 degrees/N, recording the distance L2 between the floating bevel gear (4) and the fixed bevel gear (3), and repeating the step to measure L3 ~ LN;

S3.3)L=[L1+L2+L3+···+LN]/N。

Technical Field

The invention belongs to the technical field of traditional gears, and particularly relates to a helical gear gap eliminating mechanism and a gap eliminating method thereof.

Background

The gear as the most common transmission mechanism has the advantages of high transmission efficiency, accurate transmission ratio, long service life, compact structure and the like, but the gear transmission mechanism has a very obvious defect that the meshing between the gear and the gear has a gap between teeth, and the gap between the teeth can influence the precision of accurate indexing of a transmission system when the device rotates reversely.

The existing helical gear gap eliminating mechanism is usually to add one of the helical gears into two, and add mechanisms such as spring, rubber, hydraulic pressure and the like in the two gears to make the two gears dislocate, thereby achieving the purpose of gap elimination. The existing anti-backlash gear mechanisms all use elastic links, have the defect of insufficient system rigidity under the working condition of heavy load, and the effect of eliminating the gear backlash can be gradually reduced after the elastic links are aged for a long time.

Disclosure of Invention

Aiming at the defects of poor precision, insufficient rigidity, inconvenient disassembly and the like of the existing bevel gear transmission mechanism, the invention provides a bevel gear gap eliminating mechanism which has high precision, strong rigidity and relatively convenient disassembly under the heavy load working condition, and also provides a gap eliminating method. The technical scheme adopted by the invention is as follows:

a helical gear gap eliminating mechanism comprises a driving shaft, a driven shaft and a driven helical gear, wherein a fixed helical gear and a floating helical gear which are meshed with the driven helical gear are coaxially arranged on the driving shaft;

an adjusting pad is arranged between the fixed helical gear and the floating helical gear, and the end face of the floating helical gear penetrates through a plurality of fastening screws to be connected in series with the adjusting pad and the fixed helical gear.

According to the bevel gear clearance eliminating mechanism, the driving shaft is the spline shaft, and the shaft shoulder is provided with the positioning pad so as to ensure that the end face of the fixed bevel gear is aligned with the end face of the driven bevel gear.

The backlash eliminating method of the bevel gear backlash eliminating mechanism comprises the following steps:

s1) processing a clearance groove at the shaft shoulder of the driving shaft, installing the positioning pad at the clearance groove, and rotating a certain angle to make the spline between the positioning pad and the driving shaft dislocated;

s2) fixedly assembling the fixed bevel gear on the driving shaft by abutting against the positioning pad;

s3) the floating helical gear is arranged on the driving shaft in a penetrating mode, the adjusting screw is uniformly screwed until the end faces of the floating helical gear and the fixed helical gear are respectively meshed with the left tooth face and the right tooth face of the driven helical gear, and the distance L between the floating helical gear and the fixed helical gear is measured;

s4), detaching the floating bevel gear, assembling an adjusting pad with the thickness of L +0.02 on the driving shaft, and then connecting and fixing the floating bevel gear, the adjusting pad and the fixed bevel gear in series by using a fastening screw.

In the step S3), N fastening screws are provided, and the pitch L is measured by:

s3.1) after the floating screw is adjusted, firstly measuring the distance L1 between the floating bevel gear and the fixed bevel gear;

s3.2) after the driving shaft rotates for 360 degrees/N, recording the distance L2 between the floating bevel gear and the fixed bevel gear, and repeating the step to measure L3 ~ LN;

S3.3)L=[L1+L2+L3+···+LN]/N。

the beneficial effects of the invention are as follows: the fixed gear and the floating gear can be always respectively meshed with two tooth surfaces of the driven gear, and the gap between the helical gear transmissions is eliminated. The mechanism has no elastic link, increases the contact area of the floating bevel gear and the fixed bevel gear compared with the common gap eliminating mechanism only using a screw to adjust, further enhances the rigidity of the mechanism, can be suitable for a heavy load transmission device, provides enough system rigidity for the device, and has higher positioning precision.

Drawings

FIG. 1 is a schematic diagram of an adjustment of a backlash mechanism according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an anti-backlash mechanism according to an embodiment of the present invention.

In the figure: 1. the device comprises a driving shaft, 2 parts of a positioning pad, 3 parts of a fixed helical gear, 4 parts of a floating helical gear, 5 parts of an adjusting screw, 6 parts of a driven helical gear, 7 parts of a driven shaft, 8 parts of an adjusting pad and 9 parts of a fastening screw.

Detailed Description

The invention is further explained below with reference to the drawings.

A helical gear backlash eliminating mechanism comprises a driving shaft 1, a driven shaft 7 and a driven helical gear 6, wherein a fixed helical gear 3 and a floating helical gear 4 which are meshed with the driven helical gear 6 are coaxially arranged on the driving shaft 1;

an adjusting pad 8 is arranged between the fixed bevel gear 3 and the floating bevel gear 4, and the end face of the floating bevel gear 4 penetrates through a plurality of fastening screws 9 to be connected in series with the adjusting pad 8 and the fixed bevel gear 3.

According to the helical gear clearance eliminating mechanism, the driving shaft 1 is a spline shaft, and the shaft shoulder is provided with the positioning pad 2 so as to ensure that the end face of the fixed helical gear 3 is aligned with the end face of the driven helical gear 6.

The backlash eliminating method of the bevel gear backlash eliminating mechanism comprises the following steps:

s1) processing a clearance groove at the shaft shoulder of the driving shaft 1, installing the positioning pad 2 at the clearance groove, and rotating a certain angle to make the spline between the positioning pad 2 and the driving shaft 1 dislocated;

s2) fixedly assembling the fixed bevel gear 3 on the driving shaft 1 by abutting against the positioning pad 2;

s3) the floating bevel gear 4 is arranged on the driving shaft 1 in a penetrating way, the adjusting screw 5 is screwed evenly until the end faces of the floating bevel gear 4 and the fixed bevel gear 3 are respectively meshed with the left tooth face and the right tooth face of the driven bevel gear 6, and the distance L between the floating bevel gear 4 and the fixed bevel gear 3 is measured;

s4), the floating bevel gear 4 is detached, the adjusting pad 8 with the thickness of L +0.02 is assembled on the driving shaft 1, and then the floating bevel gear 4, the adjusting pad 8 and the fixed bevel gear 3 are fixed in series by the fastening screw 9.

In step S3), N fastening screws 9 are provided, and the pitch L is measured by:

s3.1) after the floating screw 5 is adjusted, firstly measuring the distance L1 between the floating bevel gear 4 and the fixed bevel gear 3;

s3.2) after the driving shaft 1 rotates for 360 degrees/N, recording the distance L2 between the floating bevel gear 4 and the fixed bevel gear 3, and repeating the step to measure L3 ~ LN;

S3.3)L=[L1+L2+L3+···+LN]/N。