CN87206921U

CN87206921U - Measurement demonstration device for principle of gear

Info

Publication number: CN87206921U
Application number: CN 87206921
Authority: CN
Inventors: 郑守璋
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-04-30
Filing date: 1987-04-30
Publication date: 1988-02-17

Abstract

The utility model relates to a demonstration device for the plane engagement of an involute, the cylindrical gear drive principle, and the composite measurement, comprising a chassis, a straight rule, a gear rack, a circular disc, a work table, a drive member, a measurer, etc. The engaging driving of an involute can be realized consequently. A complicated spatial structure is simplified to a plane drive mechanism, manufacture and measurement are combined together, and the structure is simple. An abstract concept is displayed as a vivid image, and a total error measuring curve can be drawn up. The specific demonstration comprises the tangential composite error, the tangential-gear composite error, the accumulative pitch error, the accumulative pitch deviation, the tooth error, and the base pitch error. The utility model has multiple functions.

Description

Measurement demonstration device for principle of gear

The utility model is a kind of apparatus for demonstrating that is specially adapted to PROFILE IN PLANE CONTACT OF INVOLUTE engagement, column gear transmission principle and composite measurement thereof, a kind of audiovisual aids.

" generating method " is the main method that involute urve engagement, cylindrical gear are produced, use very general, but in teaching and all kinds of technical training (comprising the gear standard of passing through of declaring), for the formation of explanation gear drive principle, error and when measuring, adopt wall charts more, be equipped with and carry out some geometric operations because gear drive and processing and manufacturing thereof are the interactions of a pair of gear teeth in motion process, the locus is a lot of in continuous variation and influence factor, and notion is more abstract, beyonds one's depth, grasps; General teaching aid mostly is the simple type of simple function, lacks suitable audiovisual aids, influences quality of instruction to a certain extent and explains and publicises effect.

Task of the present utility model is a kind of demonstration teaching aid of gear intuitively of development, can demonstrate out the generation gear grinding principle, can demonstrate the principle of the production process and the composite measurement thereof of gear error again.

Gear principle and composite measurement demonstrator thereof are made up of institutes such as chassis (1), ruler (2), tooth bar (3), disk (4), worktable (5), driving member (6) and measuring appliances.This is according to the generate process principle, represents the profile of tooth center line of basic rack with the ruler limit, represent gear compound graduation to justify with the circle at disk edge, ruler and disk are tangent, and with being installed on the chassis, ruler drives disk by driving member, make disk do along the ruler limit to roll relatively, realize the involute urve engaged transmission; Measurement is used for the detection of gear error, and when demonstrating other principles, it can integral body unload.Ruler can be made linear slide on the fixed position, chassis, tooth bar profile of tooth center line overlaps, is installed on the ruler with the ruler limit.Tooth bar simulation cutter, ruler band tooth bar slide and simulate the feed campaign.Disk and ruler limit be tangent, be that axle is installed on the chassis with the center of circle, ruler is connected with disk also by driving member can be with disk to be synchronized with the movement.Can be with the mobile synchronous rotation that is converted into disk of ruler.Driving member can be used chain, band rope class or other transmission devices.Worktable and the coaxial installation of disk, both all can rotate relative to the chassis.The sense of touch part axis of measuring appliance be positioned on the action line and consistent with tested gear one lateral tooth flank normal direction, be with the chassis and removably connect.The straight shape slideway that cooperatively interacts is arranged on chassis, the ruler, on the axial line parallel rotating eccentric wheel (7), (8), (9) are arranged on the ruler with the ruler limit.Have on the basic rack and corresponding hole, ruler eccentric wheel position and the serrate slot (10) parallel with corresponding flanks.When being used for measuring, serrate slot slides at groove, to produce reference signal for gauge head.Rotating eccentric wheel (11) is arranged on the disk, have on the worktable and corresponding hole, disk eccentric wheel position.When demonstration generating method principle, tooth bar and ruler are done the synchronous linear motion.Worktable and pitch circle dish rotate synchronously, represent workpiece to be fixed on the work top with drawing, with the hand propelled ruler as the feed campaign, the corresponding rotation of workpiece, one section small distance of every propelling, with pen along the tooth bar tooth profile respective traces of on paper, drawing, the simulation cutting, the envelope that forms on workpiece of continuous action is the workpiece gear gear ring like this.Cross node (point of contact of ruler and disk) instrument two straight lines (17) can be set, showing left and right action line, can explain series of concepts such as the formation principle of involute urve and relevant basic circle, pressure angle, reference circle by the track of point on workpiece on the action line.Ruler, eccentric wheel on the disk and tooth bar, corresponding hole is the error generating means on the worktable.Rotate different eccentric wheels and just can demonstrate the diameter run-out of rack cutter or the angle displacement of axial float or workpiece respectively.When with driving-belt with the eccentric wheel on the disk with after the worktable rotating shaft is connected, then can cut the profile of tooth that (picture) goes out to have error.Because the generation of above-mentioned error all will cause instantaneous driving error, just can demonstrate principles such as the explanation pitch circle is not round, nodel line is straight, node motion according to this.Being reflected on the workpiece is gear ring deviation theory position, thereby produces the action line increment, and this point can be demonstrated on this instrument visually.Measuring appliance is made up of sense of touch parts (12), gauge head (13), sensing element (14), recording-member (15) and holder institutes such as (16), the sense of touch parts are removable in gauge head, and be connected with recording-member by sensing element, recording-member and sense of touch parts are synchronized with the movement, and gauge head can slide along the serrate slot on the tooth bar.This is to utilize to have the flank profil of error to compare with standard tooth form in kinetic measurement, its error is noted continuously be drawn as curve.Be that the sense of touch parts directly contact with the tooth surface of detected gear, tooth profile error is by the sense of touch parts, and sensing element transmission recording-member is described.

The major advantage and the effect of this demonstrator are: one, it is reduced to a plane gear train with the complicated spatial structure relation, processing, measurement combines together, simple structure, meet the thick reason of engaged transmission, relevant abstract concept is shown as image true to nature, very directly perceived, come into plain view two, it can demonstrate out the process principle of involute gear, error production process and the composite measurement principle total error that can draw is measured curve, specifically it can be demonstrated: 1. tangential composition error, 2. a tangential tooth composition error, 3. accumulative pitch error, 4. circular pitch deviation, 5. tooth error, 6. base pitch deviation.Have multiple function, help teaching, improve effect.Three, this instrument is manually, not consumes energy.

Cutting work synoptic diagram during accompanying drawing 1 gear demonstrator cracking-off measuring appliance.

Accompanying drawing 2 gear demonstrator composite measurement synoptic diagram.

As embodiment, see accompanying drawing 1,2, it adopts the basic rack (3) of 20 ° at standard basic rack tooth profile angle, m=20, be contained on the ruler (2), three microscler square holes are arranged on the basic rack, match with three eccentric wheels (7), (8), (9) on the ruler, when rotating eccentric wheel (7), (8), can make tooth bar upper and lower moving on ruler, diameter run-out with the demonstration rack cutter, rotate eccentric wheel (9) and can make tooth bar left and right mobile,, thereby produce the minor cycle tangential error with the axial float of demonstration cutter.Eccentric wheel (11) on the rotary disk (4), then worktable and disk have the relative angle displacement, produce the large period tangential error.For reducing volume, disk is made fan-shaped.Chassis (1), ruler (2), tooth bar (3), disk (4), worktable (5), and measuring appliance be flat member.Driving member (6) adopts two flexible ropes, intersects the point of contact of ruler and disk, i.e. working pitch point, and an end is connected with ruler, and the other end is connected with disk, and realization is with the mobile synchronous rotation that is converted into disk of ruler.During measurement, the basic rack upset is installed on the chassis for 180 °, has the projection that is bumped in the basic rack tooth profile groove (10) that gauge head is slided along serrate slot on the gauge head (13), form standard signal.Sense of touch parts (12) are aciculiform measuring staffs.Sensing element (14) is one the flexible axle of overcoat (18) to be arranged, and (14) can move freely in (18), and flexible axle one end is connected with the aciculiform measuring staff, and the other end links to each other with recording pointer (15).Overcoat one end and gauge head are fixed, and the other end and recording pointer erecting frame (19) are fixing.

Claims

1, a kind of PROFILE IN PLANE CONTACT OF INVOLUTE that is specially adapted to meshes, the demonstrator of column gear transmission principle and composite measurement thereof, it is characterized in that it is by chassis (1), ruler (2), tooth bar (3), disk (4), worktable (5), driving member (6) and measuring appliance are formed, ruler can be made linear slide on the fixed position, chassis, tooth bar profile of tooth center line overlaps with the ruler limit and is installed on the ruler, disk and ruler are tangent, with the center of circle is that axle is installed on the chassis, ruler is connected with disk by driving member and can be with disk to be synchronized with the movement, worktable and the coaxial installation of disk, the sense of touch part axis of measuring appliance are positioned on the action line and are consistent with tested gear one lateral tooth flank normal direction, be with the chassis and removably connect.

2, demonstrator as claimed in claim 1 is characterized in that the slideway that cooperatively interacts is arranged on said chassis, the ruler, on the axial line parallel with the ruler limit rotating eccentric wheel (7), (8), (9) is arranged on the ruler.

3, demonstrator as claimed in claim 1 is characterized in that having on the said tooth bar and corresponding hole, ruler eccentric wheel position, and the serrate slot parallel with corresponding flanks (10) arranged.

4, demonstrator as claimed in claim 1 is characterized in that rotating eccentric wheel (11) is arranged on the said disk.

5, demonstrator as claimed in claim 1 is characterized in that having on the said worktable and corresponding hole, disk eccentric wheel position.

6, demonstrator as claimed in claim 1, it is characterized in that said measuring appliance is made up of sense of touch parts (12), gauge head (13), sensing element (14), recording-member (15) and holder (16), the sense of touch parts are removable in gauge head, and be connected with recording-member by sensing element, recording-member and sense of touch parts are synchronized with the movement, and gauge head can slide along the serrate slot on the tooth bar.

7, demonstrator as claimed in claim 1 is characterized in that two fine rules (17) can be installed in the point of contact of ruler and disk, with the left and right action line of the demonstration of image.