Device for measuring inner diameter and tooth-rod distance of gear

Abstract

The utility model discloses a device for measuring the inner diameter and the tooth-rod distance of a gear. The measuring device comprises a bottom plate, an inner diameter measuring mechanism and a tooth-rod distance measuring mechanism, wherein the inner diameter measuring mechanism and the tooth-rod distance measuring mechanism are arranged on the bottom plate; the gear rod distance measuring mechanism comprises a first measuring assembly and a second measuring assembly which are oppositely arranged along a first direction, the inner diameter measuring mechanism is arranged between the first measuring assembly and the second measuring assembly, the inner diameter measuring mechanism comprises a reference seat for placing a gear, and the reference seat is provided with an inner diameter measuring head; a first ejector pin is arranged on the side, close to the gear, of the first measuring assembly, a second ejector pin is arranged on the side, close to the gear, of the second measuring assembly, and the first ejector pin and the second ejector pin are used for clamping the side portion of the gear. The tooth-rod distance measuring mechanism further comprises a driving assembly used for driving the first ejector pin and the second ejector pin to be close to each other or away from each other and a penholder sensor used for measuring the displacement of the first ejector pin in the second direction. The device is high in measurement efficiency and small in occupied space.

Description

Measuring device for gear inner diameter and gear rod pitch Technical Field

[0001] This utility model relates to the field of gear parameter measurement technology, and in particular to a measuring device for gear inner diameter and gear tooth pitch. Background Technology

[0002] Currently, measuring the inner diameter and gear pitch of gears is of great significance in the field of mechanical manufacturing. Existing measurement methods mainly rely on micrometers and two standard round bars. However, this method is cumbersome, requiring precise placement of the standard round bars before detailed measurement with a micrometer. The entire process is time-consuming and difficult to meet the demands of efficient production. Furthermore, its complexity necessitates specialized fixtures, which undoubtedly increases costs and management difficulties. In addition, this method demands a high level of skill from the measuring personnel; if the operator is not proficient, the measurement accuracy is easily affected by human factors, leading to deviations in results and consequently impacting the stability of product quality. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a measuring device for gear inner diameter and gear pitch that has high measurement accuracy and is easy to use.

[0004] This utility model discloses a measuring device for the inner diameter and tooth bar pitch of a gear, the measuring device comprising:

[0005] The base plate and the inner diameter measuring mechanism and the toothed bar pitch measuring mechanism mounted on the base plate;

[0006] The gear pitch measuring mechanism includes a first measuring component and a second measuring component arranged opposite to each other along a first direction. The inner diameter measuring mechanism is disposed between the first measuring component and the second measuring component. The inner diameter measuring mechanism includes a reference seat for placing the gear, and the reference seat is provided with an inner diameter measuring head.

[0007] The first measuring component has a first pin on the side near the gear, and the second measuring component has a second pin on the side near the gear. The first and second pins are used to clamp the side of the gear. The gear rod distance measuring mechanism also includes a driving component for driving the first and second pins to move closer or further apart from each other, and a pen sensor for measuring the displacement of the first pin along a second direction.

[0008] In one or more embodiments of this utility model, the inner diameter measuring mechanism further includes a fixed base, the reference base is mounted on the fixed base, the protrusion of the reference base is provided with a guide cap for guiding the gear, the reference base is provided with a placement cavity for placing the inner diameter measuring head along a second direction, and an air inlet is provided in the placement cavity along a third direction.

[0009] In one or more embodiments of the present invention, the toothed bar pitch measuring mechanism further includes a slide rail fixedly mounted on a base plate, the slide rail passing through a fixed seat, the first measuring component and the second measuring component being mounted on the slide rail, the fixed seat and the first measuring component being equipped with a first limiting post, the fixed seat and the second measuring component being equipped with a second limiting post, and the first measuring component and the second measuring component being further equipped with a driving component.

[0010] In one or more embodiments of the present invention, the first measuring component includes a first slider mounted on a slide rail, a first fixing block mounted on the first slider, a slide rail slider component mounted on the first fixing block, a first fixing plate mounted on the slide rail slider component, and a first pin provided along a second direction on the side of the first fixing plate near the second measuring component.

[0011] In one or more embodiments of this utility model, the first measuring component further includes a sensor fixing block, the pen sensor is mounted on the sensor fixing block, and a spring guide post is provided between the sensor fixing block and the slide rail slider. The spring guide post is slidably mounted on the sensor fixing block, one end of the spring guide post is in contact with the slide rail slider, and a spring is provided on the spring guide post.

[0012] In one or more embodiments of the present invention, a first limiting block and a second limiting block are respectively disposed on both sides of the first slider along the second direction, and a first buffer is also installed on the first limiting block.

[0013] In one or more embodiments of the present invention, the second measuring component includes a second slider mounted on a slide rail, a second fixing block mounted on the second slider, a second fixing plate provided on the top of the second fixing block, and a second pin provided on the side of the second fixing plate near the first measuring component along a second direction.

[0014] In one or more embodiments of the present invention, a third limiting block and a fourth limiting block are respectively disposed on both sides of the second slider along the second direction, and a second buffer is installed on the third limiting block.

[0015] In one or more embodiments of the present invention, the driving assembly includes a cylinder, a first fixed ring is provided at a first end of the cylinder, the first fixed ring is mounted on a first fixed pin, and the first fixed pin is mounted on a first measuring assembly along a first direction; a second fixed ring is provided at a second end of the cylinder, the second fixed ring is mounted on a second fixed pin, and the second fixed pin is mounted on a second measuring assembly along a first direction.

[0016] In one or more embodiments of the present invention, a first mounting plate is further included, on which a limiting screw for limiting the gear in a first direction is mounted.

[0017] The beneficial effects of this utility model are: by setting gear pitch measuring mechanisms on both sides of the inner diameter measuring mechanism and sharing one operating table, the inner diameter and gear pitch of the gear can be measured in one operation, which not only improves the measurement efficiency, but also saves the space occupied by the equipment.

[0018] In this invention, the gear inner diameter is measured by an inner diameter measuring head, eliminating the need for personnel to perform the measurement operation. This reduces the labor intensity of operators and also reduces measurement errors caused by human factors.

[0019] The gear tooth pitch measurement in this invention uses two driven pins to clamp the gear, and the displacement of the pins is calculated by a displacement sensor to obtain the gear tooth pitch. Compared with manual measurement, this method has higher measurement accuracy and efficiency. Attached Figure Description

[0020] Figure 1 is an isometric view of the gear inner diameter and gear pitch measuring device in one embodiment of the present invention;

[0021] Figure 2 is a front view of the measuring device for gear inner diameter and gear pitch in one embodiment of this utility model;

[0022] Figure 3 is a top view of the measuring device for the gear inner diameter and gear pitch in one embodiment of this utility model;

[0023] Figure 4 is a cross-sectional view of a gear inner diameter and gear pitch measuring device in one embodiment of the present invention;

[0024] Figure 5 is an isometric view of the reference base in one embodiment of the present invention;

[0025] Figure 6 is a cross-sectional view of the reference base in one embodiment of the present invention.

[0026] In the picture: base 100,

[0027] Tooth bar pitch measuring mechanism 200

[0028] First measuring component 21, first slider 211, first fixing block 212, slide rail slider component 213, first fixing plate 214, first ejector pin 215, pen sensor 216, spring 217, spring guide post 218, sensor fixing block 219, first buffer 2110, first limiting block 2111, second limiting block 2112

[0029] Second measuring component 22, second slider 221, second fixing block 222, second fixing plate 223, second buffer 224, second ejector pin 225, third limiting block 226, fourth limiting block 227.

[0030] The components include: an inner diameter measuring mechanism 300, a fixed base 31, a reference base 32, an air inlet 321, an exhaust port 322, a placement cavity 323, a first limiting post 33, a second limiting post 34, and a guide cap 35.

[0031] Drive assembly 23, first fixing pin 231, first fixing ring 232, second fixing ring 233, second fixing pin 234, first mounting plate 235, limit screw 236, cylinder 237, slide rail 24

[0032] Gear 500. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0034] In the description of this utility model, it should be understood that the terms "vertical", "horizontal", "top", "bottom", "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] It should be noted that, unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0036] As described in the background section, existing measuring devices suffer from technical problems such as cumbersome measurement steps, long measurement time, the need for specialized fixtures, and high skill requirements for measuring personnel.

[0037] To address the aforementioned problems, referring to Figure 1, this utility model provides a measuring device for gear inner diameter and gear pitch, including a base 100 and a gear pitch measuring mechanism 200 and an inner diameter measuring mechanism 300 disposed on the base 100. The gear pitch measuring mechanism 200 includes a first measuring component 21, a second measuring component 22, a drive component 23, and a slide rail 24. The slide rail 24 is mounted on the base 100 along a second direction Y. The first measuring component 21 and the second measuring component 22 are slidably mounted on the slide rail 24. The inner diameter measuring mechanism 300 is passed through and mounted by the slide rail 24. Between the first measuring component 21 and the second measuring component 22, the inner diameter measuring mechanism 300 includes a fixed base 31. The fixed base 31 is provided with a reference base 32 for placing the gear 500. The reference base 32 is provided with an inner diameter measuring head. In this embodiment, the inner diameter measuring head is a pneumatic probe. Its specific structure can be referred to in Chinese Utility Model Patent Application No. 201920277734.2 entitled "Pneumatic Probe for Inner Diameter Measurement" and Chinese Utility Model Patent Application No. 201920277800.6 entitled "Pneumatic Pen Bar Sensor". Therefore, it will not be described in detail here.

[0038] Referring to Figures 4 and 6, the inner diameter measuring mechanism 300 also includes a fixed base 31, on which a reference base 32 is mounted. A guide cap 35 for guiding the gear 500 is provided on the protrusion of the reference base 32. The reference base 32 has a placement cavity 323 along the second direction Y for placing the inner diameter measuring head. An air inlet 321 is provided inside the placement cavity 323 along the third direction Z. When the gear 500 is placed on the reference base 32, the air pressure measuring mechanism vents air into the air inlet 321, and the air pressure at the exhaust holes 322 at both ends of the placement cavity 323 is measured by the inner diameter measuring head, thereby measuring the inner diameter of the gear.

[0039] Referring to Figure 2, the first measuring component 21 has a first ejector pin 215 on the side near the gear 500, and the second measuring component 22 has a second ejector pin 225 on the side near the gear 500. The first ejector pin 215 and the second ejector pin 225 are used to clamp the side of the gear 500. The gear rod distance measuring mechanism 200 also includes a drive component 23 for driving the first ejector pin 215 and the second ejector pin 225 to move closer or further apart, and a pen sensor 216 for measuring the displacement of the first ejector pin 215 along the second direction Y. A slide rail 24 is fixedly mounted on the base plate 100, passing through a fixed seat 31. The first measuring component 21 and the second measuring component 22 are mounted on the slide rail 24. A first limiting post 33 is mounted on the fixed seat 31 and the first measuring component 21, and a second limiting post 34 is mounted on the fixed seat 31 and the second measuring component 22. The drive component 24 is also mounted on the first measuring component 21 and the second measuring component 22. The slide rail 24 is also equipped with a first slider 211, a first fixing block 212, a slide rail slider component 213, and a first fixing plate 214. A first pin 215 is provided on the side of the first fixing plate 214 near the second measuring component 22 along the second direction Y. It also includes a sensor fixing block 219, on which a pen-bar sensor 216 is mounted. A spring guide post 218 is provided between the sensor fixing block 219 and the slide rail slider component 213. The spring guide post 218 is slidably mounted on the sensor fixing block 219, with one end of the spring guide post 218 contacting the slide rail slider component 213. A spring 217 is provided on the spring guide post 218. Furthermore, it includes a first limiting block 2111 and a second limiting block 2112 respectively disposed on both sides of the first slider 211 along the second direction Y. A first buffer 2110 is also installed on the first limiting block 2111.

[0040] Referring to Figure 2, the second measuring component 22 includes a second slider 221 mounted on a slide rail 24, a second fixing block 222 mounted on the second slider 221, a second fixing plate 223 on the top of the second fixing block 222, and a second ejector pin 225 on the side of the second fixing plate 223 near the first measuring component 21 along the second direction Y. It also includes a third limiting block 226 and a fourth limiting block 227 respectively disposed on both sides of the second slider 221 along the second direction Y, and a second buffer 224 mounted on the third limiting block 226.

[0041] After the first ejector pin 215 and the second ejector pin 225 clamp the gear on both sides of the gear 500, the fourth limiting block 227, the spring guide post 218, the spring 217 and the slide rail slider 213 ensure that the contact between the first ejector pin 215 and the side of the gear 500 can provide a certain buffer without damaging the gear 500, thus maintaining the stability of the clamping.

[0042] Referring to Figure 3, the drive assembly 23 includes a cylinder 237. A first retaining ring 232 is provided at the first end of the cylinder 237, and the first retaining ring 232 is mounted on a first retaining pin 231. The first retaining pin 231 is mounted on the first measuring assembly 21 along the first direction X. A second retaining ring 233 is provided at the second end of the cylinder 237, and the second retaining ring 233 is mounted on a second retaining pin 234. The second retaining pin 234 is mounted on the second measuring assembly 22 along the first direction X. It also includes a first mounting plate 235, on which a limiting screw 236 is mounted for limiting the gear 500 in the first direction X.

[0043] Workflow: Before measurement, calibrate the measuring device using a standard inner diameter calibration gauge. Then, insert the gear rod pitch calibration gauge, press the start button, and the two ejector pins on both sides tighten, holding the calibration gauge in place, thus calibrating the gear rod pitch measuring component. After calibration, insert gear 500, press the pneumatic button, and the two ejector pins on both sides move towards the center under the action of cylinder 212. The ejector pins reach the gear groove, and the gear rod pitch and inner diameter are calculated by the sensor and measuring instrument. After measurement, the cylinder is vented, pushing the two sliders to separate, removing the workpiece, and the measurement is complete.

[0044] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A measuring device for the inner diameter and pitch of a gear, characterized in that, The measuring device includes: a base plate (100) and an inner diameter measuring mechanism (300) and a gear pitch measuring mechanism (200) mounted on the base plate (100); the gear pitch measuring mechanism (200) includes a first measuring component (21) and a second measuring component (22) arranged opposite to each other along a first direction, the inner diameter measuring mechanism (300) is disposed between the first measuring component (21) and the second measuring component (22), the inner diameter measuring mechanism (300) includes a reference seat (32) for placing a gear (500), the reference seat (32) is provided with an inner diameter measuring head; the first The measuring component (21) has a first pin (215) on the side near the placement gear (500), and the second measuring component (22) has a second pin (225) on the side near the placement gear (500). The first pin (215) and the second pin (225) are used to clamp the side of the gear (500). The gear rod distance measuring mechanism (200) also includes a driving component (23) for driving the first pin (215) and the second pin (225) to move closer or further away from each other, and a pen sensor (216) for measuring the displacement of the first pin (215) in the second direction.

2. The measuring device for gear inner diameter and gear pitch according to claim 1, characterized in that, The inner diameter measuring mechanism (300) also includes a fixed base (31), and the reference base (32) is mounted on the fixed base (31). The protrusion of the reference base (32) is provided with a guide cap (35) for guiding the gear (500). The reference base (32) is provided with a placement cavity (323) for placing the inner diameter measuring head along the second direction. The placement cavity (323) is provided with an air inlet (321) along the third direction.

3. The measuring device for gear inner diameter and gear pitch according to claim 2, characterized in that, The gear pitch measuring mechanism (200) further includes a slide rail (24) fixedly installed on the base plate (100). The slide rail (24) passes through the fixed seat (31). The first measuring component (21) and the second measuring component (22) are installed on the slide rail (24). The fixed seat (31) and the first measuring component (21) are equipped with a first limiting post (33). The fixed seat (31) and the second measuring component (22) are equipped with a second limiting post (34). The first measuring component (21) and the second measuring component (22) are also equipped with a drive component (24).

4. The measuring device for gear inner diameter and gear pitch according to claim 3, characterized in that, The first measuring component (21) includes a first slider (211) mounted on a slide rail (24), a first fixing block (212) mounted on the first slider (211), a slide rail slider component (213) mounted on the first fixing block (212), a first fixing plate (214) mounted on the slide rail slider component (213), and a first pin (215) provided along a second direction on the side of the first fixing plate (214) near the second measuring component (22).

5. The measuring device for gear inner diameter and gear pitch according to claim 4, characterized in that, The first measuring component (21) further includes a sensor fixing block (219), the pen sensor (216) is mounted on the sensor fixing block (219), and a spring guide post (218) is provided between the sensor fixing block (219) and the slide rail slider (213). The spring guide post (218) is slidably mounted on the sensor fixing block (219), one end of the spring guide post (218) is in contact with the slide rail slider (213), and a spring (217) is provided on the spring guide post (218).

6. The measuring device for gear inner diameter and gear pitch according to claim 4, characterized in that, It also includes a first limiting block (2111) and a second limiting block (2112) respectively disposed on both sides of the first slider (211) along the second direction, and a first buffer (2110) is also installed on the first limiting block (2111).

7. The measuring device for gear inner diameter and gear pitch according to claim 3, characterized in that, The second measuring component (22) includes a second slider (221) mounted on a slide rail (24), a second fixing block (222) mounted on the second slider (221), a second fixing plate (223) provided on the top of the second fixing block (222), and a second pin (225) provided on the side of the second fixing plate (223) near the first measuring component (21) along a second direction.

8. The measuring device for gear inner diameter and gear pitch according to claim 7, characterized in that, It also includes a third limiting block (226) and a fourth limiting block (227) respectively disposed on both sides of the second slider (221) along the second direction, wherein a second buffer (224) is installed on the third limiting block (226).

9. The measuring device for gear inner diameter and gear pitch according to claim 1, characterized in that, The drive assembly (23) includes a cylinder (237), the first end of which is provided with a first fixing ring (232), the first fixing ring (232) is mounted on a first fixing pin (231), the first fixing pin (231) is mounted on a first measuring assembly (21) along a first direction; the second end of the cylinder (237) is provided with a second fixing ring (233), the second fixing ring (233) is mounted on a second fixing pin (234), the second fixing pin (234) is mounted on a second measuring assembly (22) along a first direction.

10. The measuring device for gear inner diameter and gear pitch according to claim 1, characterized in that, It also includes a first mounting plate (235) on which a limiting screw (236) is mounted for limiting the gear (500) in a first direction.

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