Gear fatigue test clamp and gear fatigue loading machine

Abstract

The utility model discloses a gear fatigue test fixture, which comprises a gear clamping part, a gear tooth loading part and a position adjusting part, and is characterized in that the gear clamping part comprises a gear left supporting plate, a gear right supporting plate, a clamping nut, a clamping bolt and a gear supporting plate fastening bolt; the gear tooth loading part comprises an upper pressure head, a lower pressure head, a lower pressure head height adjusting nut, a lower pressure head sleeve and a lower pressure head sleeve fastening bolt; the position adjusting part comprises a sliding platform, an adjusting lead screw, an adjusting hand wheel, a lead screw cover plate, a sliding platform fastening bolt and a fixed platform. The utility model also discloses a gear fatigue loading machine. According to the utility model, fatigue test requirements of gears with different diameters and different widths can be met.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical testing technology, specifically relating to a gear fatigue testing fixture and a gear fatigue loading machine. Background Technology

[0002] Gear fatigue testing can accurately detect the reliability and durability of gears, which is of great significance for gear design. Currently, most existing gear fatigue testing fixtures can only be used for gears of specific sizes, while some fixtures can accommodate gears of different diameters.

[0003] Chinese patent application CN200920038643X discloses a gear fatigue testing fixture, which includes a loading part and a gear mounting part. The loading part has a loading head and a connecting part, wherein the loading head and the connecting part are integrally formed or fixedly connected. The gear mounting part has a connecting part, a base, and a gear support frame, wherein the connecting part and the base are integrally formed or fixedly connected. The base has a sliding groove, and the gear support frame is fixed to the base by connecting to the sliding groove of the base with fasteners. A gear stop is also installed on the base, and the gear stop is connected to the sliding groove of the base with fasteners. However, this structure cannot adapt to gears with different tooth widths. When clamping gears with different tooth widths, the fixture still needs to be re-machined, which easily leads to waste.

[0004] Therefore, designing and developing a gear fatigue testing fixture that can adapt to different gear diameters and widths is of great significance in gear fatigue testing. Utility Model Content

[0005] The purpose of this invention is to provide a gear fatigue testing fixture and gear fatigue loading machine that can adapt to multiple sizes, and can meet the fatigue testing needs of gears with different diameters and widths.

[0006] The technical solution is as follows:

[0007] A gear fatigue testing fixture includes: a gear clamping part, a gear tooth loading part, and a position adjustment part. The gear clamping part includes: a left gear support plate, a right gear support plate, a clamping nut, a clamping bolt, and a gear support plate fastening bolt. The left and right gear support plates have the same structure and are positioned opposite each other. Both the left and right gear support plates have through holes, and the clamping bolts pass through these through holes. The bottom of the left and right gear support plates has V-shaped... The V-shaped convex part is provided with a threaded hole; the lower part of the left and right gear support plates is provided with a connecting through hole, and the gear support plate fastening bolt passes through the connecting through hole and connects to the threaded hole in the sliding platform; the gear tooth loading part includes: an upper pressure head, a lower pressure head, a lower pressure head height adjusting nut, a lower pressure head sleeve and a lower pressure head sleeve fastening bolt. The upper pressure head is used to connect with the corresponding interface of the gear fatigue loading machine. The rod of the lower pressure head is provided with an external thread, and the lower pressure head height adjusting nut is installed on the rod of the lower pressure head. The end is installed on the inner hole of the lower pressure head sleeve; a connecting plate is provided at the lower part of the lower pressure head sleeve, and the connecting plate is provided with multiple sleeve connection through holes. The lower pressure head sleeve fastening bolt passes through the sleeve connection through holes and connects to the threaded hole of the fixed platform; the position adjustment part includes: a sliding platform, an adjusting screw, an adjusting handwheel, a screw cover plate, a sliding platform fastening bolt, and a fixed platform. The two ends of the adjusting screw are respectively provided with left-hand threads and right-hand threads. The left-hand threads and right-hand threads are respectively engaged with the threaded holes on the V-shaped protrusions at the bottom of the gear left support plate and the gear right support plate to form a threaded pair; the adjusting screw is embedded in the groove in the sliding platform to form a rotary pair; the screw cover plate is installed on the sliding platform, and the sliding platform has a dovetail groove in the middle. The screw engages with the V-shaped protrusions at the bottom of the gear left support plate and the gear right support plate to form a sliding pair; the adjusting handwheel is fixedly connected to the adjusting screw; a V-shaped protrusion is provided at the bottom of the sliding platform, and the V-shaped protrusion engages with the dovetail groove on the fixed platform to form a sliding pair; the sliding platform is fixedly connected to the fixed platform by the sliding platform fastening bolt.

[0008] Furthermore, there are two countersunk holes in the middle of the fixed platform, and the fixing screws are installed in the countersunk holes.

[0009] Furthermore, the left and right support plates of the gear are L-shaped structures, and the connecting through holes are set on the horizontal plate of the L-shaped structure.

[0010] Furthermore, the gear support plate fastening bolts pass through the connecting through holes to fix the left gear support plate and the right gear support plate to the sliding platform.

[0011] Furthermore, the lower pressure head, the lower pressure head height adjusting nut, and the lower pressure head sleeve cooperate to form a threaded pair, and the lower pressure head sleeve is fixedly connected to the fixed platform through the lower pressure head sleeve fastening bolt.

[0012] The gear fatigue loading machine includes a base, a gear fatigue testing fixture, and a fixed platform that is fixedly connected to the base by fixing screws.

[0013] This utility model has the following advantages compared with the prior art:

[0014] This utility model provides a multi-size adaptable gear fatigue testing fixture. By changing the distance between the left and right support plates of the gear, it can meet the fatigue testing requirements of gears with various tooth widths.

[0015] The fixed platform of this utility model has a T-shaped slide groove. The sliding platform is fastened by fastening bolts and the T-shaped slide groove. Therefore, the position of the sliding platform can be changed, which can adapt to the fatigue test requirements of gears of various diameters. Attached Figure Description

[0016] Figure 1 This is an isometric drawing of the multi-size adaptable gear fatigue testing fixture of this utility model;

[0017] Figure 2 This is a side view of the multi-size adaptable gear fatigue testing fixture of this utility model;

[0018] Figure 3 A top view of the sliding platform assembly of the multi-size adaptable gear fatigue testing fixture of this utility model (with the lead screw cover plate removed);

[0019] Figure 4 Axonometric drawing of the sliding platform assembly of the multi-size adaptable gear fatigue testing fixture of this utility model (with the lead screw cover plate removed);

[0020] Figure 5 This is an isometric view of the left and right support plates of the gear in the multi-size adaptable gear fatigue testing fixture of this utility model;

[0021] Figure 6 This is a cross-sectional view of the gear clamping part of the multi-size adaptable gear fatigue testing fixture of this utility model;

[0022] Figure 7 This is a cross-sectional view of the gear tooth loading section of the multi-size adaptable gear fatigue testing fixture of this utility model (with the upper pressure head removed);

[0023] Figure 8 This is an isometric drawing of the fixing platform component of the multi-size adaptable gear fatigue testing fixture of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Upper pressure head, 2-Lower pressure head, 3-Lower pressure head height adjusting nut, 4-Lower pressure head sleeve, 5-Lower pressure head sleeve fastening bolt, 6-Fixed platform, 7-Tested gear, 8-Gear left support plate, 9-Gear right support plate, 10-Clamping nut, 11-Clamping bolt, 12-Gear support plate fastening bolt, 13-Screw cover plate, 14-Adjusting handwheel, 15-Adjusting screw, 16-Sliding platform, 17-Sliding platform fastening bolt, 18-Fixing screw. Detailed Implementation

[0026] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it.

[0027] A multi-size adaptable gear fatigue testing fixture, comprising: a gear clamping part, a gear tooth loading part, and a position adjustment part.

[0028] like Figure 1-8 As shown, the gear clamping part is provided with a left gear support plate 8, a right gear support plate 9, a clamping nut 10, a clamping bolt 11, and a gear support plate fastening bolt 12. The left gear support plate 8 and the right gear support plate 9 have the same structure. The left gear support plate 8 and the right gear support plate 9 are provided with support plate through holes, and the test gear 7 is sandwiched between the left gear support plate 8 and the right gear support plate 9. The clamping bolt 11 passes through the gear through holes of the left gear support plate 8, the test gear 7, and the support plate through hole of the right gear support plate 9. The three components are connected by the clamping bolt 11 and the clamping nut 10. The left gear support plate 8 and the right gear support plate 9 are fixedly connected to the sliding platform 16 by the gear support plate fastening bolt 12.

[0029] The gear clamping part, gear tooth loading part, and position adjustment part are included. The gear clamping part includes: a left gear support plate 8, a right gear support plate 9, a clamping nut 10, a clamping bolt 11, and a gear support plate fastening bolt 12. The left gear support plate and the right gear support plate have the same structure. The left gear support plate and the right gear support plate are provided with support plate through holes. The clamping bolt 11 passes through the through holes of the left gear support plate and the right gear support plate. The lower part of the left gear support plate and the right gear support plate are provided with connecting through holes. Fastening bolt 12 passes through the connecting through hole and connects to the threaded hole of sliding platform 16; upper pressure head 1 is connected to the corresponding interface of gear fatigue loading machine; the rod of lower pressure head 2 is provided with external thread; lower pressure head height adjusting nut 3 is installed on the rod of lower pressure head 2; the lower end of the rod of lower pressure head 2 is installed on the inner hole of lower pressure head sleeve 4; a connecting plate is provided at the lower part of lower pressure head sleeve 4; the connecting plate is provided with multiple sleeve connecting through holes; lower pressure head sleeve fastening bolt 5 passes through the sleeve connecting through hole and connects to the threaded hole of fixed platform 6.

[0030] The gear loading section includes an upper pressure head 1, a lower pressure head 2, a lower pressure head height adjusting nut 3, a lower pressure head sleeve 4, and a lower pressure head sleeve fastening bolt 5. The upper pressure head 1 connects to the corresponding interface of the gear fatigue loading machine. The rod of the lower pressure head 2 is threaded, forming a threaded pair with the lower pressure head height adjusting nut 3. The lower pressure head sleeve 4 has a hollow internal structure, forming a sliding pair with the rod of the lower pressure head 2. One end of the lower pressure head height adjusting nut 3 forms a rotating pair with the lower pressure head sleeve 4. The lower pressure head sleeve 4 is fixed to the fixed platform 6 via the lower pressure head sleeve fastening bolt 5. The left and right gear support plates are L-shaped. Connecting through holes are located on the transverse plates of the L-shaped structures.

[0031] The position adjustment section includes a sliding platform 16, an adjusting screw 15, an adjusting handwheel 14, a screw cover plate 13, sliding platform fastening bolts 17, a fixed platform 6, and fixing screws 18. The adjusting screw 15 has left-hand and right-hand threads at both ends, which respectively mate with the threaded holes on the V-shaped protrusions at the bottom of the left gear support plate 8 and the right gear support plate 9 to form a threaded pair. The adjusting screw 15 is embedded in the groove 16-1 in the sliding platform 16 to form a rotary pair. The screw cover plate 13 is mounted on the sliding platform 16. The middle section of the sliding platform 16... It has a dovetail groove, which cooperates with the V-shaped protrusion at the bottom of the left support plate 8 and the right support plate 9 of the gear to form a sliding pair. The adjusting handwheel 14 is fixedly connected to the adjusting screw 15. The bottom of the sliding platform 16 has a V-shaped protrusion, which cooperates with the dovetail groove on the fixed platform 6 to form a sliding pair. The sliding platform 16 is fixedly connected to the fixed platform 6 by the sliding platform fastening bolt 17. There are two countersunk holes in the middle of the fixed platform 6, in which fixing screws 18 are installed. The fixed platform 6 is fixedly connected to the base of the gear fatigue loading machine by the fixing screws 18.

[0032] Before starting the test, the fixed platform 6 is first fixed on the base of the gear fatigue loading machine by fixing screw 18. Then, the position of the lower pressure head sleeve 4 is adjusted so that the lower pressure head 2 and the upper pressure head 1 are coaxial. Then, the lower pressure head sleeve fastening bolt 5 is tightened so that the position of the lower pressure head sleeve 4 is fixed relative to the fixed platform 6.

[0033] Then, rotate the adjusting handwheel 14. Since the two ends of the adjusting screw 15 have threads with opposite directions of rotation, and respectively cooperate with the threaded holes on the V-shaped protrusions at the bottom of the left gear support plate 8 and the right gear support plate 9 to form a threaded pair, the left gear support plate 8 and the right gear support plate 9 will move in opposite directions to separate. When the distance between the left gear support plate 8 and the right gear support plate 9 is greater than the gear tooth width, the test gear 7 will be installed between the left gear support plate 8 and the right gear support plate 9. Then, insert the gear support plate fastening bolt 12 so that the test gear 7 is coaxial with the mounting holes on the left and right gear support plates. Then, rotate the adjusting handwheel 14 in the opposite direction so that the left gear support plate 8 and the right gear support plate 9 move closer to clamp the test gear 7. Since the middle part of the adjusting screw 15 is embedded in the groove 16-1 in the middle of the sliding platform 16, it can be ensured that the tooth width center of the test gear 7 is located at the center of the sliding platform along the length direction.

[0034] Next, tighten the clamping nut 10 to completely clamp the test gear 7 between the left and right support plates. Then, tighten the gear support plate fastening bolt 12 to fix the left and right support plates relative to the sliding platform 16. Next, adjust the position of the sliding platform 16 so that the test gear 7 is close to the upper pressure head 1 and the lower pressure head 2. Then, rotate the lower pressure head height adjusting nut 3 to adjust the height of the lower pressure head 2 so that the upper end of the lower pressure head 2 abuts against a non-tested tooth on the lower part of the test gear 7. Next, adjust the height of the upper pressure head 1 so that the upper pressure head 1 presses against a tested tooth on the upper part of the test gear 7. Finally, tighten the sliding platform fastening bolt 17 to fix the sliding platform 16 relative to the fixed platform 6, thus completing the gear clamping process. Then, the gear fatigue test can be performed.

[0035] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A multi-size adaptable gear fatigue testing fixture, characterized in that, include: The gear clamping section comprises a gear clamping section, a gear tooth loading section, and a position adjustment section. The gear clamping section includes: a left gear support plate, a right gear support plate, a clamping nut, a clamping bolt, and a gear support plate fastening bolt. The left and right gear support plates have identical structures and are positioned opposite each other. Both plates have through holes, and the clamping bolt passes through these holes. The bottom of both plates has V-shaped protrusions with threaded holes. The lower parts of both plates have connecting through holes, through which the gear support plate fastening bolt connects to the threaded holes in the sliding platform. The gear tooth loading section includes: an upper pressure head, a lower pressure head, a lower pressure head height adjusting nut, a lower pressure head sleeve, and a lower pressure head sleeve fastening bolt. The upper pressure head connects to the corresponding interface of the gear fatigue loading machine. The rod of the lower pressure head has external threads, and the lower pressure head height adjusting nut is installed on the rod of the lower pressure head. The lower end of the rod of the lower pressure head is installed on the lower pressure head... The inner hole of the head sleeve; a connecting plate is provided at the lower part of the pressing head sleeve, and the connecting plate is provided with multiple sleeve connection through holes. The pressing head sleeve fastening bolt passes through the sleeve connection through holes and connects to the threaded hole of the fixed platform; the position adjustment part includes: a sliding platform, an adjusting screw, an adjusting handwheel, a screw cover plate, a sliding platform fastening bolt, and a fixed platform. The two ends of the adjusting screw are respectively provided with left-hand threads and right-hand threads. The left-hand threads and right-hand threads are respectively engaged with the threaded holes on the V-shaped protrusions at the bottom of the gear left support plate and the gear right support plate to form a threaded pair; the adjusting screw is embedded in the groove in the sliding platform to form a rotary pair; the screw cover plate is installed on the sliding platform, and there is a dovetail groove in the middle of the sliding platform. The screw engages with the V-shaped protrusions at the bottom of the gear left support plate and the gear right support plate to form a sliding pair; the adjusting handwheel is fixedly connected to the adjusting screw; a V-shaped protrusion is provided at the bottom of the sliding platform, and the V-shaped protrusion engages with the dovetail groove on the fixed platform to form a sliding pair; the sliding platform is fixedly connected to the fixed platform by the sliding platform fastening bolt.

2. The multi-size adaptable gear fatigue testing fixture as described in claim 1, characterized in that, There are two countersunk holes in the middle of the fixed platform, and the fixing screws are installed in the countersunk holes.

3. The multi-size adaptable gear fatigue testing fixture as described in claim 1, characterized in that, The left and right support plates of the gear are L-shaped structures, and the connecting through holes are set on the horizontal plate of the L-shaped structure.

4. The multi-size adaptable gear fatigue testing fixture as described in claim 2, characterized in that, The gear support plate fastening bolts pass through the connecting through holes to fix the left gear support plate and the right gear support plate to the sliding platform.

5. The multi-size adaptable gear fatigue testing fixture as described in claim 1, characterized in that, The lower pressure head, the lower pressure head height adjusting nut, and the lower pressure head sleeve cooperate to form a threaded pair. The lower pressure head sleeve is fixedly connected to the fixed platform through the lower pressure head sleeve fastening bolt.

6. A gear fatigue loading machine, comprising a base, characterized in that, It also includes the gear fatigue testing fixture as described in any one of the claims, wherein the fixing platform is fixedly connected to the base by fixing screws.

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