阅读说明：本技术 一种滚针装配式十字垫圈 (Needle roller assembly type cross washer ) 是由 于振江 凌四营 凌明 圣宏杰 王晓东 王立鼎 于 2020-06-24 设计创作，主要内容包括：本发明属于精密装配技术领域,涉及一种滚针装配式十字垫圈。为解决现有十字垫圈存在的问题,本发明提供了一种滚针装配式十字垫圈,采用标准件滚针过盈装配在圆环保持架上,控制圆环保持架上两轴线垂直的圆形凹糟的加工精度,便可实现高性能低成本滚针装配式十字垫圈的制作。本发明的有益效果在于,发明了一种滚针装配式十字垫圈,采用高硬度的标准件滚针过盈装配在低成本的圆环保持架上,制成十字垫圈,具有成本低、制作方便、定位精度高、定位可靠的优点,可满足接触两面不严格平行的零件的精密定位需求,广泛应用于精密定位领域,具有良好的市场应用前景与推广价值。(The invention belongs to the technical field of precision assembly and relates to a needle roller assembly type cross washer. In order to solve the problems of the conventional cross washer, the invention provides the needle roller assembly type cross washer, which is characterized in that a standard needle roller is assembled on a circular ring retainer in an interference manner, and the machining precision of circular grooves which are vertical to two axes on the circular ring retainer is controlled, so that the needle roller assembly type cross washer with high performance and low cost can be manufactured. The roller pin assembled cross washer has the beneficial effects that the roller pin assembled cross washer is manufactured by assembling the high-hardness standard component roller pins on the low-cost ring retainer in an interference manner, has the advantages of low cost, convenience in manufacturing, high positioning precision and reliability in positioning, can meet the precision positioning requirement of parts with two contact surfaces which are not strictly parallel, is widely applied to the field of precision positioning, and has good market application prospect and popularization value.)

1. A needle roller assembly type cross washer is characterized by comprising a circular ring retainer (1) and two groups of four needle rollers (2) which are vertically arranged; circular grooves vertical to the axis direction are respectively arranged on two end faces of the circular ring retainer, the axis of each circular groove is parallel to the end face of the circular ring retainer, and the depth of each circular groove is 2/3-3/4 of the diameter of the roller pin; the diameter of the circular groove is 0.005-0.01 mm smaller than that of the roller pin.

2. The needle-assembling cross washer according to claim 1, wherein the ring holder (1) is made of a rigid and elastic steel material or a material with equivalent properties, and has two parallel end faces; the four rolling needles (2) are standard parts of the same batch, and are made of bearing steel materials, the hardness is not lower than HRC60, the diameter is not lower than 2mm, and the precision grade is not lower than G3 grade.

3. The needle-assembling type cross washer according to claim 1, wherein both end faces of the ring holder (1) are of the same size of ring structure or of different sizes of step structures.

4. The needle roller assembled cross washer according to claim 1, wherein two circular grooves on the same end surface of the ring holder (1) are coaxial and centrally arranged, and the processing is completed by one-time clamping through slow wire cutting.

Technical Field

The invention belongs to the technical field of precision assembly and relates to a needle roller assembly type cross washer.

Background

The mounting and positioning precision of the part has great influence on the precision machining and the measurement precision of the part. Especially, in the ultra-precision machining process, the installation and positioning errors of the parts account for more than 50% of the total machining or measurement errors of the parts. The precision assembly process of the part is a coupling process of geometric errors of the part and assembly stress. In the practical process, a locking nut is usually matched with a rigid compression ring to realize the installation and the positioning of the part, and the end surface of the positioning locking nut is not parallel to the positioning surface of the part, so that the locking nut is not directly adopted to realize the precise positioning of the part in the precise assembly process; even if the rigid compression ring is added, the abrasion of a part positioning surface is reduced, the problem of unbalanced assembly stress in the positioning process of the part still cannot be solved, and the positioning precision of the part is influenced. The problems of unstable positioning and positioning unbalance loading caused by the fact that the contact surfaces of the locking nut and the positioned workpiece are not parallel can be solved by adopting a combined positioning mode of the locking nut, the cross washer and the flat washer. However, the existing cross washer is mostly of an integrated structure, working faces on two sides are machined by adopting an integral linear cutting process, and the problems of high requirements on material performance, high machining cost, low precision of positioning of arc buses and the like exist.

Disclosure of Invention

In order to solve the problems of the conventional cross washer, the invention provides the needle roller assembly type cross washer, which is characterized in that a standard needle roller is assembled on a circular ring retainer in an interference manner, and the machining precision of circular grooves which are vertical to two axes on the circular ring retainer is controlled, so that the needle roller assembly type cross washer with high performance and low cost can be manufactured.

A needle roller assembly type cross washer comprises a circular ring retainer and two groups of four needle rollers which are vertically arranged; circular grooves vertical to the axis direction are respectively arranged on two end faces of the circular ring retainer, the axis of each circular groove is parallel to the end face of the circular ring retainer, and the depth of each circular groove is 2/3-3/4 of the diameter of the roller pin; the diameter of the circular groove is 0.005-0.01 mm smaller than that of the roller pin.

The circular ring retainer is made of steel with certain rigidity and elasticity or a material with equivalent performance, two end faces of the circular ring retainer are parallel, and the circular ring retainer can be designed into a circular ring structure with the same size or a step structure with different sizes according to actual requirements; the rolling needles are standard parts of the same batch, and are made of bearing steel materials, the hardness is not lower than HRC60, the diameter is not lower than 2mm, and the precision grade is not lower than G3 grade;

two circular grooves on the same end face of the circular ring retainer are coaxial and distributed in the middle, and the machining is finished by adopting slow-speed wire cutting and one-step clamping.

By changing the structure of the ring retainer, the assembled cross washer which realizes the same positioning function is still in the protection scope of the invention.

The roller pin assembled cross washer has the beneficial effects that the roller pin assembled cross washer is manufactured by assembling the high-hardness standard component roller pins on the low-cost ring retainer in an interference manner, has the advantages of low cost, convenience in manufacturing, high positioning precision and reliability in positioning, can meet the precision positioning requirement of parts with two contact surfaces which are not strictly parallel, is widely applied to the field of precision positioning, and has good market application prospect and popularization value.

Drawings

Fig. 1 shows the effect of the assembly of the needle rollers on the ring cage.

Fig. 2a circular ring cage.

In the figure: 1, a circular retainer; 1-1, an A end of a circular retainer; 1-1-1A end circular groove a; 1-1-2A end circular groove b; 1-2, the B end of the circular retainer; a circular groove a at the 1-2-1B end; 1-1-2B end circular groove B; 2, rolling needles.

Detailed Description

The embodiment of the patent is illustrated by taking a circular ring cage with a step structure as an example.

According to the sizes of the positioning surface of the positioned part and the working surface of the locking nut, a 1-ring retainer with a step structure is designed. The thickness of the end A of the 1-1 circular retainer and the thickness of the end B of the 1-2 circular retainer are 5mm, the width of each circular ring is 10mm, the 1 circular retainer is made of 45 steel materials which are prepared and processed in a cutting mode, and the size of a sharp edge chamfer is 0.2-0.5; the error of parallelism between the end A of the 1-1 circular retainer and the end B of the 1-2 circular retainer is not more than 0.02 mm. The surface roughness of the whole 1-ring retainer is Ra1.6.

The same batch of standard 1 needle rollers P3X 9.8G 30-3 GB/T309-2000 are selected. Firstly, cutting by adopting a slow-moving wire and simultaneously processing a 1-1-1A end circular groove a and a 1-1-2A end circular groove b of the A end of the 1 circular retainer, controlling the axes of the circular grooves a and b to be parallel to the end face of the A end of the 1 circular retainer, controlling the distance to be about 0.7mm, and controlling the diameters of the 1-1-1A end circular groove a and the 1-1-2A end circular groove b to be 2.987-2.997 mm, thereby ensuring that the roller pin is in interference connection with the circular retainer.

Then turning over the 1-ring retainer, simultaneously processing a 1-2-1B end circular groove a and a 1-2-2B end circular groove B at the B end of the 1-ring retainer by adopting slow-speed wire cutting, controlling the coaxiality of the B end circular grooves a and B, and controlling the axial line to be vertical to the bearings of the 1-1-1A end circular groove a and the 1-1-2A end circular groove B and to be parallel to the B end face of the 1-ring retainer, wherein the distance is about 0.7 mm; the diameters of the 1-1-1A end circular groove a and the 1-1-2A end circular groove b are controlled to be 2.987-2.997 mm, and interference connection between the roller pin and the circular ring retainer is guaranteed.

And (3) symmetrically installing the 2 rolling needles into the circular ring retainer 1 along the radial direction of the 1 circular ring retainer in a hot-fitting mode, and finishing the manufacture of the rolling needle assembly type cross washer.

When in use, the needle assembly type cross washer provided by the patent is matched with the parallel washer for use. Contact buses of the rolling needles on the same side of the rolling needle assembly type cross washer are basically collinear, and the rolling needle assembly type cross washer can rotate slightly in an adaptive manner within +/-1 degree by taking the buses as a rotation center so as to adapt to the angle deviation of a contact surface of a part to be positioned and a contact surface of a lock nut, and the positioning reliability and the positioning precision are improved.