阅读说明：本技术 一种谐波定向车轮及其生产工艺 (Harmonic wave directional wheel and production process thereof ) 是由 童胜坤 孙瑶龙 金津 钱聚营 朱文婧 黄伟杰 王少军 俞炯祥 于 2020-07-24 设计创作，主要内容包括：本发明公开了一种谐波定向车轮及其生产工艺,车轮的谐波低点位置分布在气门孔左右45°范围内,气门孔对面的辐条上设有凹陷结构,所述凹陷结构用于补偿车轮质心的偏离量,提高动平衡的合格率。谐波车轮的生产工艺,首先,将车轮定位在旋转式工装上；其次,调整旋转式工装的主轴的偏心距离；之后,主轴旋转,驱动旋转式工装及其上的车轮同步旋转,车刀对车轮的外轮廓进行切削,加工出所述的谐波车轮。工装的偏心距离可调,能够适应多种型号的车轮加工,也适应同种型号车轮对不同谐波值的要求。(The invention discloses a harmonic wave directional wheel and a production process thereof, wherein the harmonic wave low points of the wheel are distributed in the range of 45 degrees left and right of a valve hole, a spoke opposite to the valve hole is provided with a concave structure, and the concave structure is used for compensating the deviation of the mass center of the wheel and improving the qualification rate of dynamic balance. The production process of the harmonic wheel comprises the following steps of firstly, positioning the wheel on a rotary tool; secondly, adjusting the eccentric distance of a main shaft of the rotary tool; and then, the main shaft rotates to drive the rotary tool and the wheels on the rotary tool to synchronously rotate, and the turning tool cuts the outer contour of the wheels to process the harmonic wheels. The eccentric distance of the tool is adjustable, the tool can adapt to the machining of wheels of various models, and the tool also adapts to the requirements of wheels of the same model on different harmonic values.)

1. The utility model provides a directional wheel of harmonic, harmonic low point position distributes in 45 within ranges about the valve hole, its characterized in that: the spokes (11) opposite to the valve holes (14) are provided with concave structures (12) which are used for compensating the deviation of the mass center of the wheel (10).

2. The harmonic directional wheel of claim 1, wherein: the recessed structure (12) is an extension of the groove (13) on the spoke (11).

3. The harmonic directional wheel of claim 1, wherein: the concave structure (12) and the wheel (10) are integrally formed through casting.

4. A production process of a harmonic directional wheel is characterized by comprising the following steps: firstly, positioning a wheel (10) on a rotary tool (20); secondly, adjusting the eccentric distance of a main shaft (21) of the rotary tool; and then, the main shaft rotates to drive the rotary tool and the wheel on the rotary tool to synchronously rotate, and the turning tool cuts the outer contour of the wheel to process the harmonic wheel as claimed in claim 3.

5. The process for producing a harmonically oriented wheel of claim 4, wherein: the main shaft (21) is connected with a power mechanism through a clutch (30), the clutch comprises a shell (31), a driving shaft (32), a pressure plate (33) positioned in the shell, an active friction plate (34) and a diaphragm spring (35), a strip-shaped guide groove (311) is formed in the upper surface of the shell, the driving shaft comprises a shaft section part (321) and a friction plate part (322), the shaft section part is matched in the strip-shaped guide groove and connected with the main shaft, the friction plate part is positioned in the shell, and the pressure plate can enable the active friction plate to be in partial contact with the friction plate under the action of the diaphragm spring.

6. The process for producing a harmonically oriented wheel of claim 5, wherein: the upper part (211) of the main shaft is provided with a positioning column (213) which can be matched with the valve hole (14), and the orthographic projection of the positioning column on the shell (31) is positioned in the length direction of the strip-shaped guide groove (311).

Technical Field

The invention relates to the technical field of motor vehicle accessories, in particular to a structure of a harmonic wave directional wheel and a production process thereof.

Background

In order to avoid bad driving experience such as obvious jitter and the like in the running process of the whole vehicle, the whole vehicle manufacturer has corresponding requirements on performances such as wheel jumping and harmonic waves, and meanwhile, in the south American market, in order to improve tire loading efficiency, the whole vehicle manufacturer intends to adopt a valve hole positioning mode to load tires to simplify a measuring and assembling procedure in the loading process, so that the whole vehicle manufacturer has regulations on harmonic values and low point areas of the wheels, a first harmonic wave of 0.14-0.35 and a second harmonic wave of 0.16 are required, and the lowest point of the harmonic wave is 45 degrees to the left and the right of a valve hole. Wherein, the harmonic wave refers to the variation value of the run-out, and the run-out refers to the difference of radial and axial high and low points of the inner and outer tire bead seats.

In order to improve the production rhythm of the assembly process, part of customers have the requirement of directional loading on parts to simplify the measurement and assembly procedure of the loading process, and in order to match the simplified assembly steps of the whole vehicle factory, I propose the concept of positioning and loading the valve hole, solve the technical difficulty that the existing tool, equipment and process cannot realize that the harmonic low point is in the range of 45 degrees left and right of the valve hole, develop the directional process of the harmonic point, effectively control the primary harmonic value and the low point positioning, and realize the mass production of the series of wheels

In order to enable the radial harmonic lowest point of the inner and outer tire bead seats of the wheel hub to be positioned at the valve hole, a patent document with an authorization publication number of CN209239541U discloses a positioning core and a tool provided with the positioning core, wherein the tool comprises a base plate, a pull claw mechanism and a central positioning mechanism; the center line of the core seat deviates from the center line of the connecting seat, so the cutting amount of the edge of the hub corresponding to the valve hole is larger than the cutting amount of the edge of the hub at other places, namely, the lowest harmonic point of the hub is around the valve hole. Wherein the positioning core is customized for a particular hub.

After the wheel hub is eccentrically machined, the center of mass deviates, so that the balance reject ratio of a product is increased, and unbalanced points are concentrated on one side of a valve hole.

Disclosure of Invention

The technical problems solved by the invention are as follows: and (5) compensating the unbalance amount of the product.

In order to solve the technical problems, the invention provides the following technical scheme: the harmonic low point positions are distributed in the range of 45 degrees left and right of a valve hole, and a spoke opposite to the valve hole is provided with a concave structure which is used for compensating the deviation of the mass center of the wheel.

This product adopts eccentric processing back, and the barycenter of product takes place to deviate, leads to the balanced defective rate of product to rise, and unbalanced point concentrates on valve hole one side, through drawing the material (specifically being the design of sunk structure) to product valve hole opposite spoke and carry out the counter weight design, reaches the compensation of unbalance amount. And the qualification rate of dynamic balance is improved by the compensation design of the unbalance amount of the product.

A production process of a harmonic wave directional wheel comprises the following steps of firstly, positioning the wheel on a rotary tool; secondly, adjusting the eccentric distance of a main shaft of the rotary tool; and then, the main shaft rotates to drive the rotary tool and the wheels on the rotary tool to synchronously rotate, and the turning tool cuts the outer contour of the wheels to process the harmonic wave directional wheels.

Compared with the tooling provided with the positioning core in the prior art, the tooling provided by the invention has the technical effects that the whole tooling is eccentrically arranged: firstly, the tooling does not need to be eccentrically arranged for positioning the wheel, so that the wheel is more stably and conveniently positioned on the tooling; and secondly, the eccentric distance of the tool is adjustable, the tool can adapt to the machining of wheels of various models, and the tool also adapts to the requirements of wheels of the same model on different harmonic values.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic view of a harmonic directional wheel;

FIG. 2 is a schematic view of a combination structure of the rotary tool and the clutch;

FIG. 3 is a schematic view of the drive shaft 32 of FIG. 2;

fig. 4 is a left side view of fig. 3.

The symbols in the drawings illustrate that:

10. a wheel; 11. spokes; 12. a recessed structure; 13. a groove; 14. a valve hole;

20. rotating the tool; 21. a main shaft; 211. the upper part of the main shaft; 212. the lower part of the main shaft; 213. a positioning column; 214. a first threaded connection; 215. a second threaded connection; 216. a third threaded connection; 22. a support; 221. a top plate; 223. a base plate; 224. a guide post; 23. a lifting frame; 24. pressing parts; 241. a track groove; 242. a pressure head;

30. a clutch; 31. a housing; 311. a strip-shaped guide groove; 312. an adjusting seat; 313. adjusting the screw rod; 32. a drive shaft; 321. a shaft segment portion; 322. a friction plate portion; 323. the shaft section part is provided with a structure matched with the strip-shaped guide groove; 33. a platen; 34. an active friction plate; 35. a diaphragm spring; 36. a clutch block; 37. a bearing; 38. a ring gear.

Detailed Description

Referring to fig. 1, the harmonic low point positions of the harmonic directional wheel are distributed in a range of 45 degrees left and right of a valve hole, and a spoke 11 opposite to the valve hole 14 is provided with a concave structure 12 which is used for compensating the deviation of the mass center of the wheel 10.

The positions of the harmonic low points are distributed in a range of 45 degrees left and right of the valve hole, that is, a central angle corresponding to a section of the edge (arc shape) of the hub where the harmonic low points are located is 45 degrees, the center of the circle is the center of the hub, and the valve hole is in a sector range corresponding to the central angle of 45 degrees, which is described in patent document with publication number CN 209239541U.

The recessed feature 12 provides a reduction in mass of the portion of the wheel opposite the valve hole 14 to balance the offset in the center of mass (or center of gravity) of the wheel due to the presence of the valve hole.

The recessed formation 12 is an extension of the groove 13 in the spoke 11. The wheel is of an original structure, radial grooves are formed in spokes of the wheel, and the wheel extends on the basis of the original grooves to form the concave structures 12. Specifically, the recessed structure extends in the circumferential direction of the wheel.

The concave structure 12 and the wheel 10 are cast and integrally formed, after the valve hole 14 is machined, the wheel is machined, and a harmonic directional wheel with harmonic low points distributed in the range of 45 degrees left and right of the valve hole is formed.

A production process of a harmonic wave directional wheel comprises the following steps of firstly, positioning a wheel 10 on a rotary tool 20; secondly, adjusting the eccentric distance of a main shaft 21 of the rotary tool; and then, the main shaft rotates to drive the rotary tool and the wheels on the rotary tool to synchronously rotate, and the turning tool cuts the outer contour of the wheels to process the harmonic wave directional wheels.

As shown in fig. 2, the rotary tool 20 includes a support 22, a lifting frame 23, and a pressing member 24, the support includes a top plate 221 and a bottom plate 223, a guide post 224 is disposed between the top plate and the bottom plate, and the lifting frame is disposed between the top plate and the bottom plate and movably engaged with the guide post. The lifting frame is screwed with a screw rod (not shown in the attached drawing), the bottom end of the screw rod is pivoted with the bottom plate, the top end of the screw rod is pivoted with the top plate, and a handle for rotation is arranged at the top end of the screw rod which protrudes upwards out of the top plate. The bottom of casting die 24 is articulated with the crane, and the middle part of casting die is seted up orbit groove 241, orbit groove and the axle type part clearance fit on roof 221, and the top of casting die is equipped with the pressure head 242 that can oppress the wheel.

The main shaft 21 comprises an upper portion and a lower portion, the upper portion is fixedly connected with the top plate 221 through a first threaded connector 214, and the lower portion 212 of the main shaft is fixedly connected with the upper portion 211 of the main shaft through a second threaded connector 215. The lower part of the main shaft is fixedly connected with the bottom plate 223 through a third threaded connection 216. In practice, the wheel is centred on the top of the upper part 211 of the spindle, the screw is manually rotated, the screw drives the crane 23 to descend, and the ram 242 presses down on the outer edge of the wheel to fix the wheel.

The adjustment of the eccentric distance of the main shaft 21 of the rotary tool is specifically a distance between the lower part 212 of the main shaft and the rotation center of the clutch 30 described below.

As shown in fig. 2, the main shaft 21 is connected with the power mechanism through a clutch 30, the clutch includes a housing 31, a driving shaft 32, a pressure plate 33, an active friction plate 34 and a diaphragm spring 35, the housing has a strip-shaped guide slot 311 on the upper surface, the driving shaft includes a shaft section 321 and a friction plate 322, as shown in fig. 3 and 4, the shaft section is partially fitted in the strip-shaped guide slot and connected with the main shaft, the friction plate is partially located in the housing, and the pressure plate can make the active friction plate contact with the friction plate under the action of the diaphragm spring. The clutch is pivoted on the frame through a bearing 37, a gear ring 38 is matched on the clutch, the gear ring is matched with a gear of the power mechanism, and the clutch rotates under the driving of the power mechanism to drive the main shaft 21 to rotate.

A clutch block 36 which is lifted and lowered is provided below the diaphragm spring 35, and the clutch block is lifted and lowered by a hydraulic cylinder (not shown in the drawings). The clutch block rises to act on the diaphragm spring, the outer ring of the diaphragm spring does not press the pressure plate 33 any more, the driving friction plate 34 and the friction plate part 322 are loosened, an operator can apply acting force on the shaft section part 321, the shaft section part displaces along the strip-shaped guide groove 311, the whole rotary tool 20 displaces along with the displacement, the shaft axis of the main shaft 21 deviates from the rotating center line of the clutch, the deviation is controlled by the operator, and scales can be arranged beside the strip-shaped guide groove, so that the adjustment of the operator is facilitated. After the eccentricity is properly adjusted, the operator activates the hydraulic cylinder, the clutch block 36 descends, the outer ring of the diaphragm spring re-presses the pressure plate 33, the pressure plate drives the active friction plate to press against the friction plate portion, the friction plate portion is pressed against the inner side wall of the housing 31, the friction plate portion 322 is fixed, and the position of the main shaft 21 is fixed. Under the drive of the power mechanism, the clutch and the tool rotate synchronously, the tool rotates eccentrically, the wheel on the tool rotates eccentrically correspondingly, and the turning tool turns the wheel to machine the harmonic wave directional wheel.

The upper part 211 of the main shaft is provided with a positioning column 213 which can be matched with the valve hole 14, and the orthographic projection of the positioning column on the shell 31 is positioned in the length direction of the strip-shaped guide groove 311. Namely, the center line of the positioning column passes through a horizontal connecting line between the axis line of the adjusted main shaft and the rotating center line of the clutch, so that the positions of the harmonic low points can be distributed in a range of a certain angle (such as 45 degrees) left and right of the valve hole.

As a modification, the housing 31 of the clutch 30 is provided with an adjusting seat 312, and an adjusting screw 313 is screwed on the adjusting seat and can abut against the shaft section 321. An operator twists the adjusting screw rod, and the adjusting screw rod can translate the driving shaft 32, so that the eccentricity of the main shaft 21 can be conveniently adjusted. In addition, the adjusting screw also has a positioning function on the driving shaft.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description herein, since various changes and modifications can be made in the details of the embodiment and the application range according to the spirit of the present invention.