CN106705798A - Tooth thickness measuring tool for annular gear - Google Patents

Abstract

The invention discloses a tool for measuring the tooth thickness of an inner ring gear, which comprises a dial indicator dial (4), an end face positioning part (2), a screw micrometer mechanism (3) and a measuring rod distance measurement mechanism (1); The sub-meter dial (4) is installed on the top of the spiral micrometer mechanism (3), the end face positioning part (2) is set in the middle of the spiral micrometer mechanism (3), and the measuring rod distance measuring mechanism (1) is installed on the spiral micrometer mechanism (3) at the bottom. The technical effect of the invention is that the tooth thickness of the variable-tooth-thickness internal ring gear can be measured quickly and accurately, and the operation is simple and portable.

Description

A tool for measuring tooth thickness of inner ring gear

technical field

The invention relates to gear measurement technology, in particular to a tool for measuring tooth thickness of an inner ring gear.

Background technique

Involute variable tooth thickness gear, referred to as variable tooth thickness gear. It belongs to a kind of involute gear, and the tooth shape in each end section perpendicular to the axis is involute, and only the coefficient of variation in each section is different. According to Chinese patent document CN102353312A, it is recorded in the background technology of a small-angle variable tooth thickness gear tooth thickness measurement tool and its measurement method: for the tooth thickness measurement of involute variable tooth thickness gear, it cannot be used because it is difficult to accurately locate. Conventional tools and methods are used to detect gear tooth thickness, especially it is very difficult to accurately measure the tooth thickness of gears with variable tooth thickness on-machine during online processing.

For the tooth thickness measurement of the variable tooth thickness internal ring gear, there is no dedicated tooth thickness measuring instrument at present, and the above-mentioned difficulties still exist. At present, when using an inner ring gear tooth thickness measuring instrument for tooth thickness measurement, on the one hand, the measuring instrument is too large to be configured separately, and it is often necessary to bring the ring gear to the inner ring gear tooth thickness measuring instrument, which is inconvenient to use; on the other hand On the one hand, for variable-tooth-thickness internal ring gears, it is necessary to measure position parameters in multiple directions. Too much movement will reduce the tooth thickness measurement accuracy of variable-tooth-thickness internal ring gears, and the operation process is complicated, which is not suitable for online processing. Take measurements.

Contents of the invention

Aiming at the problem of measuring the tooth thickness of the variable-tooth-thickness internal gear, the technical problem to be solved by the present invention is to provide a tool for measuring the tooth thickness of the internal gear, which can quickly and accurately measure the tooth thickness of the variable-tooth-thickness internal The tooth is thick, and the operation is simple, easy to carry.

The technical problem to be solved by the present invention is achieved through such a technical scheme, which includes a dial indicator dial, an end face positioning component, a screw micrometer mechanism and a measuring rod distance measuring mechanism, and the dial indicator dial is installed on the top of the screw micrometer mechanism , the end face positioning part is arranged in the middle of the spiral micrometer mechanism, and the measuring rod distance measuring mechanism is installed at the bottom of the spiral micrometer mechanism.

The use process of the present invention is: place the beam support on both sides of the end face positioning part on one end face of the ring gear, and under the natural state, the fixed measuring head and the moving measuring head of the measuring rod distance measuring mechanism are stretched to the maximum under the action of the return spring Long state; adjust the screw micrometer mechanism, move the probe of the measuring rod distance measuring mechanism to the cross-section of the tooth surface of the inner ring gear to be measured, obtain the distance value H between the measuring point and the end surface, lock the screw micrometer mechanism, Use the measuring rod distance measuring mechanism to measure the measuring rod distance on the cross-section of the tooth surface of the inner ring gear to be tested, and read the measuring rod distance value on the dial dial, that is, the M value.

Because the present invention is used to measure the tooth thickness of the inner ring gear, the 100% meter and the spiral micrometer structure are adopted, and the measuring precision is high; the key degrees of freedom of the present invention are few and the structural rigidity is relatively large, so the measuring precision is further improved. When the present invention measures the variable-tooth-thickness inner ring gear, it only needs to place the base of the end face positioning part against one end face of the inner ring gear, adjust the height of the measuring head, and then read the amount on the section directly on the dial indicator. Rod distance, fast and convenient.

Therefore, the technical effect of the present invention is that the tooth thickness of the variable-tooth-thickness internal ring gear can be quickly and accurately measured, and the operation is simple and portable.

Description of drawings

The accompanying drawings of the present invention are as follows:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of the spiral micrometer mechanism in Fig. 1;

Fig. 3 is a schematic structural view of the end face positioning component in Fig. 1;

Figure 4 is a partial enlarged view of A in Figure 3;

Fig. 5 is a structural schematic diagram of the measuring rod distance measuring mechanism in Fig. 1 .

In the figure: 1. Measuring rod distance measuring mechanism; 2. End face positioning parts; 3. Spiral micrometer mechanism; 4. Dial indicator dial; 11. Fixed probe; 13. Measuring rod distance measuring mechanism support; 14. Moving Measuring head; 16. Horizontal wedge slider; 17. Vertical wedge slider; 18. Return spring end cover; 19. Return spring;

21. Support slider; 22. Set nut; 23. Beam support; 24. Beam;

31. Micrometer screw cylinder; 32. Screw micrometer mechanism support; 33. Fixed sleeve; 34. Differential cylinder; 35. Card slot; 36. Differential nut; 37. Ratchet knob; 38. Nut; 39. Lock arm.

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

As shown in Figure 1, the present invention comprises dial indicator dial 4, end face positioning part 2, screw micrometer mechanism 3 and measuring rod distance measuring mechanism 1; , the end face positioning part 2 is fitted on the screw micrometer support 32 in the middle of the screw micrometer mechanism 3 through the positioning slot, and the measuring rod distance measuring mechanism 1 is installed on the bottom end of the screw micrometer mechanism 3 through threaded connection.

As shown in Figure 2, the screw micrometer mechanism 3 is similar in structure to the screw micrometer mechanism of the micrometer, including a screw pair transmission mechanism composed of a micrometer screw cylinder 31 and a differential nut 36 and a fixed sleeve 33 and a micrometer cylinder 34. Composed of the measurement and reading mechanism, the micrometer thread cylinder 31 and the micrometer cylinder 34 are connected through the shoulder on the micrometer thread cylinder 31 and the card groove formed by the nut 38, and the differential nut 36 is connected with the fixed sleeve 33 through the card groove 35; A ratchet knob 37 is installed on the upper part of the barrel 34, and a ratchet and a ratchet spring are pressed in the ratchet groove of the ratchet knob 37; When the limit value is reached, the ratchet jumps the teeth and slides relative to the micrometric screw cylinder, keeping the internal mechanism of the screw micrometric mechanism stable. As shown in Figure 1, a screw micrometer mechanism support 32 fitted with the end face positioning part 2 is provided on the fixed sleeve 33, and the threaded middle hole of the screw micrometer mechanism support 32 is equipped with a hole for fixing with the fixed sleeve 33. When the screw micrometer mechanism 3 needs to be moved, the lock arm 39 is unscrewed, and when the screw micrometer mechanism 3 needs to be fixed, the lock arm 39 is tightened to lock the fixed sleeve 33.

The direction of the scale numerals of the fixed sleeve 33 and the microtube 34 is vertical, which is convenient for reading. Rotate the micrometer cylinder 34, the micrometer thread cylinder 31 moves axially, and the movement amount of the micrometer thread cylinder 31 can be read by the rotation amount of the micrometer cylinder, thereby measuring the height value.

The ratchet knob 37 adopts a rotary structure, which is convenient for processing; the outer surface is knurled; the inner surface is processed into a ratchet, and forms a ratchet and pawl mechanism with the ratchet; a single-stage differential knob is used to reduce the complexity of the operation of the screw micrometer mechanism.

As shown in Figure 3, the end face positioning part 2 includes a beam 24 and a beam support 23, and the two beam supports 23 are located below the two ends of the beam 24, and the top of the beam support 23 is provided with a bearing slider 21, and the beam support 23 The top screw rod stretches into the chute of the beam base plate, and is fastened on the beam base plate by the set nut 22 and the beam support 23. Loosen the fastening nut 22, and the beam support 23 can slide relative to the beam 24.

As shown in Fig. 3 and Fig. 4, stage clip 25, positioning ball 27 and gland 26 are installed in the aperture of the middle sliding hole side wall of crossbeam (24), stage clip 25 is pressed on the inside of positioning ball 27, and part of positioning ball 27 The gland 26 protrudes and is compressed by the gland to form a positioning and clamping mechanism for fitting the end face positioning component 2 with the support 32 of the screw micrometer mechanism.

As shown in Figure 5, the measuring rod distance measuring mechanism 1 comprises a fixed probe 11, a measuring rod distance measuring mechanism support 13, a vertical wedge-shaped slider 17, a horizontal wedge-shaped slider 16 and a moving probe 14; the measuring rod distance measuring mechanism The support 13 has a horizontal hole and a radial hole in the middle; the fixed measuring head 11 is fixedly connected with one side of the horizontal hole of the measuring mechanism support 13; the moving measuring head 14 connected with the horizontal wedge-shaped slider 16 is connected with the measuring rod The other side of the horizontal hole from the measuring mechanism support 13 is slidingly connected; the return spring end cover 18 is vertically installed on the radial hole in the middle of the measuring rod distance measurement mechanism support 13, and the step through hole in the return spring end cover 18 forms a vertical slide. The vertical slideway is equipped with a vertical wedge-shaped slide block 17 with a back-moving spring 19 through the vertical slideway. The wedge-shaped surface at the bottom of the vertical wedge-shaped slide block 17 is in close contact with the wedge-shaped surface at the end of the horizontal wedge-shaped slide block 16, and is in close contact with the vertical wedge-shaped slide block. The opposite side of the wedge-shaped surface 17 abuts against the inner end surface of the fixed measuring head 11 .

Both the horizontal wedge-shaped slide block 16 and the vertical wedge-shaped slide block 17 are cylindrical substrates, and the intersection angles between their wedge-shaped surfaces and their axes are all 45 degrees. Oil grooves are respectively arranged on the cylindrical surfaces of the horizontal wedge-shaped slider 16 and the vertical wedge-shaped slider 17, and the two closely-contacted wedge-shaped surfaces can slide relative to each other.

The above-mentioned fixed measuring head 11 and moving measuring head 14 adopt small-diameter cylinders; the axis of the measuring head is perpendicular to the axis of the gear to be measured.

The use process of the present invention is: place the two beam supports 23 of the end face positioning part 2 on one end face of the ring gear, and under the natural state, the fixed measuring head 11 and the moving measuring head 14 are stretched to the longest under the action of the return spring 19 State: adjust the screw micrometer mechanism 3, move the measuring rod from the measuring head of the measuring mechanism 1 to the cross section of the tooth surface to be measured of the inner ring gear, obtain the distance value H between the measuring point and the end surface, and lock the screw micrometer mechanism , Measure the measuring rod distance on the cross section of the tooth surface of the inner ring gear to be measured with the measuring rod distance measuring mechanism 1, and read the measuring rod distance value on the percentage dial 4, that is, the M value.

So the advantages of the present invention are:

1. It can not only measure the tooth thickness of ordinary spur gear inner ring gear and helical gear inner ring gear, but also measure the tooth thickness of variable tooth thickness inner ring gear.

2. It is small in size and easy to carry. When measuring the variable-tooth-thickness internal gear, you only need to place the base of the end face positioning structure against one end of the variable-tooth-thickness internal It is quick and convenient to read the measuring rod distance on the cross-section on the table.

3. Only two key degrees of freedom are related to the measurement accuracy, one is the up and down movement of the measuring rod distance measurement mechanism, and the other is the telescopic movement of the measuring head. Greatly improved measurement accuracy.

Claims (9)

1. a kind of tooth thickness measuring tool of ring gear, it is characterized in that：Including dial gauge dial plate（4）, end face positioning element（2）, spiral shell Rotation micrometer mechanism（3）With length bar away from measuring mechanism（1）；Dial gauge dial plate（4）Installed in spiral micrometer mechanism（3）Top, end Face positioning element（2）It is located at spiral micrometer mechanism（3）Middle part, length bar is away from measuring mechanism（1）It is installed on spiral micrometer mechanism（3） Bottom.

2. the tooth thickness measuring tool of ring gear according to claim 1, it is characterized in that：The spiral micrometer mechanism（3）Bag Include by micrometer screw cylinder（31）With differential nut（36）The screw pair gear transmission mechanism of composition and by fixes sleeve（33）With differential Cylinder（34）The survey measurements mechanism of composition, micrometer screw cylinder（31）With microdrum（34）By micrometer screw cylinder（31）On the shaft shoulder With nut（38）The draw-in groove connection of composition, differential nut（36）With fixes sleeve（33）Linked by draw-in groove 35；In microdrum （34）Top is provided with ratchet knob（37）, in ratchet knob（37）Ratchet slot in be pressed with ratchet and ratchet spring.

3. the tooth thickness measuring tool of ring gear according to claim 2, it is characterized in that：In the fixes sleeve（33）On set Have and end face positioning element（2）Chimeric spiral micrometer mechanism bearing（32）, spiral micrometer mechanism bearing（32）Screw thread mesopore Equipped with for fixes sleeve（33）Fixed screws arm（39）.

4. the tooth thickness measuring tool of ring gear according to claim 3, it is characterized in that：The fixes sleeve（33）And differential Cylinder（34）Number of division word direction be vertical.

5. the tooth thickness measuring tool of the ring gear according to claim 1,2,3 or 4, it is characterized in that：The end face location division Part（2）Including crossbeam（24）And beam support（23）, two beam supports（23）Positioned in crossbeam（24）Two ends lower section, crossbeam branch Seat（23）Top is provided with bearing sliding block（21）, beam support（23）Top screws put in crossbeam（24）The chute of base plate, by tightening Nut（22）With beam support（23）It is fastened on crossbeam base plate.

6. the tooth thickness measuring tool of ring gear according to claim 5, it is characterized in that：The crossbeam（24）Middle slide opening Stage clip is equiped with the hole of side wall（25）, place kick（27）And gland（26）, stage clip（25）It is pressed in place kick（27）Inner side, it is fixed Position ball（27）A part stretches out gland（26）And compression is glanded, constitute end face positioning element（2）With spiral micrometer mechanism bearing （32）Chimeric positioning and clamping body.

7. the tooth thickness measuring tool of ring gear according to claim 5, it is characterized in that：Length bar is away from measuring mechanism（1）Including Fixed gauge head（11）, length bar is away from measuring mechanism bearing（13）, vertical wedge block（17）, horizontal wedge block（16）Surveyed with mobile Head（14）；Length bar is away from measuring mechanism bearing（13）It is provided with lateral aperture, middle part and is provided with radial hole；Fixed gauge head（11）With length bar away from survey Measuring mechanism bearing（13）Linking is fixed on one side of lateral aperture；With horizontal wedge block（16）The mobile gauge head of connection（14）With length bar Away from measuring mechanism bearing（13）Slide linking in the another side of lateral aperture；Back-moving spring end cap（18）Vertically mounted in length bar away from measuring machine Structure bearing（13）On the radial hole of middle part, back-moving spring end cap（18）Interior step through-hole forms vertical slideway, and vertical slideway is built-in Pass through set back-moving spring（19）Vertical wedge block（17）, vertical wedge block（17）The lozenges of bottom is sliding with level wedge shape Block（16）The lozenges of termination is in close contact, with vertical wedge block（17）The opposite side of lozenges against fixed gauge head（11） Inner face.

8. the tooth thickness measuring tool of ring gear according to claim 7, it is characterized in that：Horizontal wedge block（16）With it is vertical Wedge block（17）Cylindrical matrix is, its lozenges is 45 degree with the angle of cut of its axis.

9. the tooth thickness measuring tool of ring gear according to claim 8, it is characterized in that：Fixed gauge head（11）With mobile gauge head （14）Using small-diameter circular cylinder.