A detection device and detection method for a landing gear transmission differential

Abstract

The application provides a landing gear transmission differential device detection device and detection method. The detection device base, first clamping mechanism and second clamping mechanism are respectively slidably connected with the base in the X direction, so that the first clamping mechanism and the second clamping mechanism can output relative clamping force; the base is further provided with a third clamping mechanism for outputting clamping force in the Y direction, the X direction and the Y direction have an acute angle alpha, the first clamping mechanism and the second clamping mechanism are provided with detection tables installed in a rotating manner on the side thereof; the first clamping mechanism is provided with a first scale line, the first scale line is in contact with the probe of the adjacent detection table, and the second clamping mechanism is provided with a second scale line, the second scale line is in contact with the probe of the adjacent detection table. The application is convenient to use, the detection result is accurate, and the landing gear is guaranteed to be delivered according to quality.

Description

Technical Field

[0001] This invention relates to the field of aircraft landing gear testing technology, and in particular to a testing device and method for a landing gear gear differential device. Background Technology

[0002] The differential mechanism, combined with the hydraulic system for steering the nose wheel of an aircraft, forms the nose wheel control system, operating at temperatures between -55°C and +60°C. The differential mechanism includes gear shafts, washers and bushings of various sizes, gears, thrust bearings, rolling bearings, locking screws, a large gear, and a planetary gear transmission. The planetary gear transmission includes three shafts, planetary gear housings, bushings, lugs, three pinions (the first gear), and numerous screws and bearings of different types and specifications.

[0003] The tooth flank clearance between gears in a differential gear system has design requirements. Maintaining the tooth flank clearance within the design range ensures smooth, non-rolling rotation of the differential gear. Appropriate tooth flank clearance can compensate for installation and manufacturing errors, providing reasonable space for thermal deformation and elastic deformation of the gears. Simultaneously, it ensures even load distribution across all gears, avoiding excessive contact stress and extending gear lifespan.

[0004] Therefore, it is particularly important to design the appropriate tooth flank clearance and to test that clearance. Summary of the Invention

[0005] The purpose of this invention is to provide a detection device and method for a landing gear transmission differential that can accurately detect the backlash of each gear tooth, realize the transmission function, and meet the control requirements of the landing gear front wheel.

[0006] The technical solution of the present invention is: a detection device for a landing gear derailleur differential device, comprising a base, a first clamping mechanism disposed at one end of the base in a top-and-clip manner, and a second clamping mechanism disposed at the other end of the base in a top-and-clip manner. The first clamping mechanism and the second clamping mechanism are slidably connected to the base in the X direction, so that the first clamping mechanism and the second clamping mechanism can output relative top clamping forces. The base is also provided with a third clamping mechanism that outputs clamping force in the Y direction. The X direction and the Y direction have an acute angle α. A detection gauge is provided on the side of the first clamping mechanism and the second clamping mechanism in a rotatable manner. The first clamping mechanism is provided with a first graduation line, which contacts the probe of the adjacent detection gauge. The second clamping mechanism is provided with a second graduation line, which contacts the probe of the adjacent detection gauge.

[0007] Preferably, the height position of the first and second etched lines is equal to d. vn d vn =Zvn.m nm, where d vn The pitch circle diameter is m. nm Zvn is the normal module; Zvn is the number of teeth; the probe of the detection gauge is in contact with the first and second graduation lines respectively.

[0008] Preferably, the base includes a base plate, on which guide rails and a mounting plate are provided. The guide rails are located at both ends in the X direction, and the mounting plate is located in the middle of the base plate. Each end of the guide rail is provided with a through waist-shaped groove, and a locking member for limiting the sliding position of the first clamping mechanism or the second clamping mechanism is installed in the waist-shaped groove. The third clamping mechanism is mounted on the mounting plate.

[0009] Preferably, the side of the waist-shaped groove away from the guide rail is provided with a countersunk platform to form a fixing surface E, and the locking member is provided with an end face F, which abuts against the fixing surface E.

[0010] Preferably, the first clamping mechanism includes a center seat, a first center located at the upper end of the center seat, and a first clamp located beside the center seat;

[0011] The second clamping mechanism includes a center seat, a second center located at the upper end of the center seat, and a second clamp located beside the center seat;

[0012] The two aforementioned center seats are slidably connected to the base, and the first center and the second center are both arranged opposite each other in the X direction; the first gradation line is provided on the first clamp; the second gradation line is provided on the second clamp.

[0013] Preferably, the center base includes a seventh plate, a slider disposed at the bottom of the seventh plate, and an eighth plate vertically disposed at the upper end of the seventh plate. The slider is slidably connected to the base, and the eighth plate is used to install the first center or the second center.

[0014] Preferably, the eighth plate is provided with a conical hole that extends through in the X direction, and the small ends of the conical holes on the two eighth plates on the base are arranged close to each other, and a first tip or a second tip is installed in the conical hole.

[0015] Preferably, the first clamp includes a first plate, a first clamping arm connected to the end of the first plate and forming a first clamping cavity, and two first ear plates formed at the end of the first clamping arm, with a first gap between the two first ear plates. One of the first ear plates is provided with a first screw hole, and the other first ear plate is provided with a first light hole. A clamping bolt for connecting with the first screw hole is installed in the first light hole, and the first engraving line is provided on the first plate. The first plate is eccentrically positioned on the first clamping arm.

[0016] The second clamp includes a ninth plate, a second clamping arm connected to the end of the ninth plate and forming a second clamping cavity, and two second ear plates formed at the end of the second clamping arm. A second gap is formed between the two second ear plates. One of the second ear plates is provided with a second screw hole, and the other second ear plate is provided with a second light hole. A clamping bolt for connecting with the second screw hole is installed in the second light hole. The second engraving line is provided on the ninth plate. The ninth plate is eccentrically arranged on the second clamping arm.

[0017] Preferably, the third clamping mechanism includes a first support plate, a second support plate, and a clamping block. The first support plate and the second support plate are connected to each other and simultaneously connected to the base. A clamping cavity is formed between the connected first support plate and the second support plate. The clamping block is slidably placed in the clamping cavity in the Y direction.

[0018] The present invention also provides a method for detecting a landing gear transmission differential, which uses the aforementioned detection device for the landing gear transmission differential and includes the following steps:

[0019] Step 1: Fit the portion that the first clamping mechanism can hold onto the gear shaft, and fit the portion that the second clamping mechanism can hold onto the outer diameter of the right end shaft of the second gear.

[0020] Step 2: Move the clamping parts of the first clamping mechanism and the second clamping mechanism respectively, so that the gear shaft and the right end shaft of the first clamping mechanism and the second clamping mechanism are clamped together respectively;

[0021] Step 3: Rotate the differential device so that the end face of the gear shaft of one of the first gears is close to one end of the third clamping mechanism;

[0022] Step 4: Adjust the other end of the third clamping mechanism so that both ends of the third clamping mechanism clamp the gear shaft of the first gear.

[0023] Step 5: Adjust the measuring instrument near the first clamping mechanism so that its head contacts the first graduation mark, and adjust the measuring instrument near the second clamping mechanism so that its head contacts the second graduation mark.

[0024] Step 6: Apply a force of less than 0.25 Nm at the force application position of the differential device to rotate all the first and second gears to the right and adjust the pointer of the test gauge to the "0" position;

[0025] Step 7: Apply a force of less than 0.25 Nm at the force application point to rotate all the first and second gears to the left to their limit, and record the readings on the test gauge. Then apply a force of 0.25 Nm again at the force application point to rotate all the first and second gears to the right to their limit, and record the readings on the test gauge. After left and right rotation, half of the test gauge readings should be between 0.02 and 0.05 mm, which indicates the acceptable tooth flank clearance for each gear.

[0026] Step 8: Loosen the other end of the third clamping mechanism in Step 4, rotate the differential device so that the end face of the gear shaft of the other first gear on it is close to one end of the third clamping mechanism, and repeat Step 4 and Step 7; complete the test.

[0027] Compared with related technologies, the beneficial effects of the present invention are as follows:

[0028] 1. The invention is fixed on the first gear, and the first gear, gear shaft and second gear are in a mating relationship. Force is applied at the force application position of the gear shaft, and half of the reading of the measuring instrument is used to obtain the gear tooth backlash, which has high accuracy.

[0029] Second, based on the inspection results, make appropriate corrections and adjustments to certain parts of the differential device in advance to ensure that the tooth flank clearance of each gear is within the range required by the aircraft design and improve product quality.

[0030] Third, based on the test results, the present invention adjusts the thickness of the relevant washers, or locks the nuts of the pinion positioning shaft or the large gear end with the stop screw, so that the tooth backlash of each gear is between 0.02 and 0.05 mm under room temperature conditions of 20±5℃, to ensure the landing gear operation requirements.

[0031] IV. Testing device for the landing gear gearbox differential device: This testing device is easy to use and provides accurate test results, ensuring that the landing gear is delivered 100% up to standard.

[0032] 5. The first and second clamps are connected to the outer diameter of the gear shaft as a whole by clamping bolts. During the test, they rotate synchronously with the gear and gear shaft, improving the accuracy of the test.

[0033] VI. The center seat slides along the X direction on the base and locks at any time; by controlling the position of the center seat and replacing the clamp, it can be used to detect the gear tooth backlash of similar fork hole devices, and has good versatility.

[0034] 7. The clamping of the first gear (small gear) adopts a third clamping mechanism (i.e., a combination of clamping block, spring, pressure screw and first support plate and second support plate that slides in the Y direction for positioning and clamping), which facilitates the installation and positioning of the differential device. Attached Figure Description

[0035] Figure 1 A three-dimensional structural schematic diagram of the detection device for the landing gear gear differential device provided by the present invention;

[0036] Figure 2 for Figure 1 A top-down view;

[0037] Figure 3 For along Figure 2 AA section view diagram;

[0038] Figure 4 For along Figure 2 BB cross-sectional diagram in the middle;

[0039] Figure 5 This is a schematic diagram of the three-dimensional structure of the base;

[0040] Figure 6 This is a schematic diagram of the planar structure of the base;

[0041] Figure 7 For along Figure 6 CC section view diagram;

[0042] Figure 8 For along Figure 6 DD sectional view diagram in the middle;

[0043] Figure 9 This is a schematic diagram of the first clamp structure;

[0044] Figure 10 This is a structural diagram of the first support plate;

[0045] Figure 11 This is a schematic diagram of the clamping block structure;

[0046] Figure 12 This is a schematic diagram of the second support plate;

[0047] Figure 13 This is a schematic diagram of the structure of the second apex;

[0048] Figure 14 This is a structural schematic diagram of the locking component;

[0049] Figure 15 This is a cross-sectional view of the apex.

[0050] Figure 16 A schematic diagram of the three-dimensional structure of the apex;

[0051] Figure 17 This is a schematic diagram of the planar structure of the second clamp;

[0052] Figure 18 This is a three-dimensional structural diagram of the second clamp;

[0053] Figure 19 This is a schematic diagram of the planar structure of the instrument panel from the first perspective.

[0054] Figure 20 This is a schematic diagram of the planar structure of the instrument panel from a second perspective.

[0055] Figure 21 This is a schematic diagram of the three-dimensional structure of the clamping plate. Detailed Implementation

[0056] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" used below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0057] like Figure 1 , Figure 2 As shown, the detection device for a landing gear gearbox differential device provided in this embodiment includes a base 1, a first clamping mechanism 20 disposed at one end of the base 1 in a top-and-clip manner, a second clamping mechanism 30 disposed at the other end of the base 1 in a top-and-clip manner, a clamping bolt 17, a gauge rod 18, and a gauge plate 19. The first clamping mechanism 20 and the second clamping mechanism 30 are slidably connected to the base 1 in the X direction, so that the first clamping mechanism 20 and the second clamping mechanism 30 can output relative clamping forces. The base 1 is also provided with a third clamping mechanism 40 that outputs clamping force in the Y direction. A dial indicator 50, which is a dial gauge and has a detection head 501, is provided on the side of both the first clamping mechanism 20 and the second clamping mechanism 30.

[0058] like Figure 5 , Figure 6 As shown, the base 1 includes a base plate 101. The parallelism of the upper and lower working surfaces of the base plate 101 is within 0.01 mm, and a guide rail 104 and a mounting plate 103 are provided on the upper working surface. The guide rails 104 are arranged in pairs at both ends in the X direction. Each end of the guide rail 104 has a through waist-shaped groove 105. Figure 7 As shown, the waist-shaped groove 105 has a countersunk platform on the side away from the guide rail 104 to form a fixing surface E. A locking member 14 for limiting the sliding position of the first clamping mechanism 20 or the second clamping mechanism 30 is installed in the waist-shaped groove 105. The mounting plate 103 is located in the middle of the base plate 101.

[0059] like Figure 6 As shown, the mounting plate 103 has holes for mounting the third clamping mechanism 40. The third clamping mechanism 40 is mounted in the corresponding holes on the mounting plate 103 by screws 6 and pins 5. The center lines of all the holes form the Y direction. The extension direction of the waist-shaped groove 105 is the X direction, and the X direction and the Y direction have an acute angle α.

[0060] The substrate 101 is provided with process holes 102, which serve as the benchmark for testing and calibration before the base 1 is manufactured and the entire testing device is assembled and put into use.

[0061] like Figure 5 As shown, the substrate 101 has two bosses 106 on the side away from the mounting plate 103, and each boss 106 has a first mounting hole 107. The first mounting hole 107 is used to insert the dial indicator rod 18.

[0062] like Figure 8 As shown, the lower end of the substrate 101 is provided with a cavity 108, which is used to house the connecting parts of the differential device, and the cavity 108 has a shock absorption function.

[0063] The base 1 is made of gray cast iron. Its complex surfaces, including the guide rail 104, mounting plate 103, boss 106, waist-shaped groove 105, cavity 108, and various mounting holes, are cast in one operation, resulting in high production efficiency and low cost. Furthermore, the cast base has shock absorption capabilities, is wear-resistant, and easy to machine. After machining, the parallelism of the upper and lower working surfaces of the base is guaranteed to be within 0.01mm, demonstrating high manufacturing precision.

[0064] like Figure 1 , Figure 2 As shown, the first clamping mechanism 20 includes a top seat 13, a first top 2 disposed on the upper end of the top seat 13, and a first clamp 3 located beside the top seat 13. The second clamping mechanism 30 includes a top seat 13, a second top 12 disposed on the upper end of the top seat 13, and a second clamp 16 located beside the top seat 13.

[0065] like Figure 16 As shown, the top seat 13 includes a seventh plate 131, a slider 133 disposed at the bottom of the seventh plate 131, and an eighth plate 132 vertically disposed at the upper end of the seventh plate 131. The slider 133 is slidably connected to the guide rail 104 on the base 1. The seventh plate 131 is provided with a second mounting hole 134, in which a locking element 14 (such as...) is installed. Figure 3 As shown). Figure 14 As shown, the locking member 14 includes a square head 141 and a screw 142 connected to the square head 141. The end face F of the square head 141 near the screw 142 abuts against the fixing surface E, achieving effective locking. The screw 142 is fitted into the second mounting hole 134 and extends upward above the seventh plate 131, where a shoulder nut 15 is threadedly connected. When the shoulder nut 15 is loosened, the center seat 13 slides under the guidance of the screw 142 and the waist-shaped groove 105. Once the sliding position is determined, the shoulder nut 15 is tightened to lock the position.

[0066] like Figure 15As shown, the eighth plate 132 has a conical hole 135 extending in the X direction, and the small ends of the conical holes 135 on the two eighth plates 132 on the base 1 are positioned close to each other. A first tip 2 or a second tip 12 is installed in the conical hole 135. Figure 13 As shown, the first tip 2 and the second tip 12 have the same structure, but differ in axial dimensions. The first tip 2 and the second tip 12 are conical structures.

[0067] The two center seats 13, the first center 2, and the second center 12 are rotationally symmetrical, ensuring that the working parts of the two centers and the centering part are on the same rotation center. After the two center seats 13 are locked in place, the coaxiality of the first center 2 and the second center 12 is guaranteed to be within φ0.01mm, resulting in more accurate test results.

[0068] like Figure 9 As shown, the first clamp 3 includes a first plate 31, a first clamping arm 32 connected to the end of the first plate 31 and forming a first clamping cavity 33, and two first ear plates 34 formed at the end of the first clamping arm 32. A first gap 37 is formed between the two first ear plates 34. One of the first ear plates 34 is provided with a first screw hole 34, and the other first ear plate 34 is provided with a first light hole 26. A clamping bolt 17 for connecting with the first screw hole 34 is installed in the first light hole 26.

[0069] like Figure 1 , Figure 2 As shown, the differential device 23 includes a gear shaft 7, a planetary gear connected to the end of the gear shaft 7, and a second gear 22 meshing with the planetary gear. The planetary gear includes a plurality of first gears 21. A right end shaft 221 is provided on the right side of the second gear 22. A force-applying position 231 is provided on the gear shaft 7. The end of the gear shaft 7 away from the planetary gear abuts against the first center 2. The right end shaft 22 abuts against the second center 12.

[0070] The gear shaft 7 is inserted into the first clamping cavity 33. When the clamping bolt 17 is tightened, the first clamping arm 32 clamps the gear shaft 7. The first gap 37 is designed to be 2mm in size, so that the first clamp 3 has a certain degree of elasticity.

[0071] The first plate 31 has a first graduation line 38, and the height of the first graduation line 38 (referring to the distance from the first graduation line 38 to the horizontal center line H3 of the first clamping arm 32) is equal to the pitch circle diameter d of the first gear 21. vn . d vn =Zvn.m nm , where m nmZvn is the normal module of the first gear 21; Zvn is the number of teeth of the first gear 21. In this embodiment, the height of the first scribe line 38 is 24mm. The first scribe line 38 is 0.2mm deep and 0.1mm wide.

[0072] The first plate 31 is eccentrically positioned on the first clamping arm 32. That is, the side surface of the first plate 31 with the first scribe line 38 coincides with the vertical center line H4 of the first clamping arm 32.

[0073] like Figure 17 , Figure 18 As shown, the second clamp 16 includes a ninth plate 161, a second clamping arm 162 connected to the end of the ninth plate 161 and forming a second clamping cavity 163, and two second ear plates 164 formed at the ends of the second clamping arm 162. A second gap 167 is formed between the two second ear plates 164. One of the second ear plates 164 has a second screw hole 165, and the other second ear plate 164 has a second aperture 166. A clamping bolt 17 for connecting with the second screw hole 165 is installed in the second aperture 166.

[0074] The right-end shaft 221 is inserted into the second clamping cavity 163. When the clamping bolt 17 is tightened, the second clamping arm 162 clamps the right-end shaft 221. The second gap 167 is designed to be 2mm in size, so that the second clamp 16 has a certain degree of elasticity.

[0075] The ninth plate 161 is provided with a second gradation line 168, the height of which (referring to the distance from the second gradation line 168 to the horizontal center line H2 of the second clamping arm 162) is equal to the pitch circle diameter d of the second gear 21. vn . d vn =Zvn.m nm , where m nm Zvn is the normal module of the second gear 21; Zvn is the number of teeth of the second gear 21. In this embodiment, the height of the second scribe line 168 is 72mm. The second scribe line 168 is 0.2mm deep and 0.1mm wide.

[0076] The ninth plate 161 is eccentrically positioned on the second clamping arm 162. That is, the side surface of the ninth plate 161 with the second scribe line 168 coincides with the vertical center line H1 of the second clamping arm 162 (e.g., Figure 17 (As shown).

[0077] like Figure 1 , Figure 2 As shown, the third clamping mechanism 40 includes a first support plate 4, a second support plate 11, and a clamping block 8. The first support plate 4 and the second support plate 11 are connected to each other and simultaneously connected to the base 1. A clamping cavity is formed between the connected first support plate 4 and the second support plate 11. The clamping block 8 is slidably placed in the clamping cavity in the Y direction.

[0078] like Figure 10 As shown, the first support plate 4 includes a second plate 41. One end of the second plate 41 has a first mounting surface 46, and the other end is sequentially bent and connected to a third plate 42 and a fourth plate 44. The end of the fourth plate 44 has a first clamping surface 45. The first clamping surface 45 is an arc-shaped surface. The bottom of the second plate 41 has a second mounting surface 43. Figure 1 , Figure 2 As shown, the second mounting surface 43 is connected to the mounting plate 103 by screws 6 and pins 5. The second plate 41 and the fourth plate 44 extend along the Y direction, and the third plate 42 is perpendicular to the Y direction.

[0079] like Figure 12 As shown, the second support plate 11 includes a fifth plate 111 and a first extension plate 112 vertically connected to the end of the fifth plate 111. The first extension plate 112 is provided with a sliding cavity 113. Figure 1 , Figure 2 As shown, the fifth plate 111 is fixed to the first mounting surface 46 by screws 6 and pins 5. The fifth plate 111 is parallel to the third plate 42, and the first extension plate 112 is arranged opposite to the fourth plate 44.

[0080] like Figure 11 As shown, the clamping block 8 includes a sixth plate 81 and a second extension plate 82 vertically connected to the end of the sixth plate 81. The sixth plate 81 is slidably placed in the sliding cavity 113. A clamping screw 9 is threaded onto the fifth plate 111, and a spring 10 is fitted onto the clamping screw 9. The spring 10 abuts against the end of the clamping screw 9 and the fifth plate 111. The end of the clamping screw 9 extending into the sliding cavity 113 is connected to the sixth plate 81. The second extension plate 82 has a V-shaped second clamping surface 83. Figure 1 , Figure 4 As shown, the first clamping surface 45 and the second clamping surface 83 are opposite each other and are used to clamp the gear shaft of the first gear 21. By tightening the clamping screw 9, the clamping block 8 is pushed to slide in the sliding cavity 113, so that the second clamping surface 83 moves toward the first clamping surface 45, thereby clamping or releasing the gear shaft.

[0081] like Figure 4 As shown, the gear shaft of the first gear 21 is clamped using an arc surface and a V-surface, which not only achieves effective clamping and ensures the accuracy of the test, but also allows for the clamping of gear shafts with different outer diameters, making it highly versatile.

[0082] like Figure 19 , Figure 20 , Figure 21As shown, the clamping plate 19 is Z-shaped, thereby forming a first arm 181 and a second arm 182. The first arm 181 has a third gap 183, and the second arm 182 has a fourth gap 186. The third gap 183 and the fourth gap 186 are not on the same plane. Similarly, the third gap 183 causes the first arm 181 to form two arms, one with a third threaded hole 184 and the other with a third aperture 185. The end of the third gap 183 is a third mounting hole 189, through which the probe of the measuring instrument 50 passes, causing the probe head 501 on the probe to contact the first graduation line 38. A clamping bolt 17 is installed in the third aperture 185 and threadedly connected to the third threaded hole 189 to lock the probe in the third mounting hole 189.

[0083] The fourth gap 186 creates two second arms 182, one with a fourth threaded hole 187 and the other with a fourth through hole 188. The end of the fourth gap 186 is the fourth mounting hole 190. (Example...) Figure 1 As shown, the bottom of the mounting rod 18 is inserted into the first mounting hole 107 of the base plate 101, and the mounting rod 18 and the first mounting hole 107 are in a H7 / r6 clamping fit. The upper end of the mounting rod 18 is inserted into the fourth mounting hole 190, and the mounting rod 18 and the fourth mounting hole 190 are in an H9 / f8 clearance fit. The height position of the clamping plate 19 is locked by the clamping bolt 17. The third clearance 183 and the fourth clearance 186 are both 2mm.

[0084] The present invention also provides a method for detecting a landing gear gearbox differential, which uses the aforementioned detection device for the landing gear gearbox differential and includes the following steps:

[0085] In step S1, the first clamping arm 32 of the first clamp 3 in the first clamping mechanism 20 is fitted onto the gear shaft 7, with the first graduation line 38 facing the operator. The second clamping arm 162 of the second clamp 16 in the second clamping mechanism 30 is fitted onto the outer diameter of the right end shaft 221 of the second gear 22, with the second graduation line 168 facing the operator.

[0086] Step S2, move the two center seats 13 on the base 1 respectively, so that the first center 2 presses against the left end of the gear shaft 7 (e.g. Figure 2 The first tip 2 and the second tip 12 are pressed against the tip hole (not shown) of the right end shaft 221. The shoulder nuts 15 on the screws 6 mounted on the two tip seats 13 are tightened respectively to lock the position of the tip seats 13, thereby pressing the first tip 2 and the second tip 12 against the two ends of the differential device 23.

[0087] Step S3: Rotate the differential device 23 so that the end face of the gear shaft of one of the first gears 21 is close to the third clamping mechanism 40, and make one side end face of the gear shaft on the first gear 21 abut against the first clamping surface 45.

[0088] In step S4, adjust the clamping screw 9 of the third clamping mechanism 40 so that the clamping block 8 moves closer to the gear shaft on the first gear 21 in step S3 until the second clamping surface 83 abuts against the other end face of the gear shaft. This achieves clamping of the first gear 21.

[0089] Step S5: Adjust the first clamp 3 and the second clamp 16 to the vertical position and tighten their respective clamping bolts 17 to lock them in place. Adjust the gauge 50 located near the first clamping mechanism 20, specifically by adjusting the height of the gauge clamp 19 along the gauge mounting rod 18 and rotating the gauge clamp 19 so that the probe 501 of the gauge 50 contacts the first graduation line 38. Adjust the gauge 50 located near the second clamping mechanism 30, following the same steps, so that its gauge head contacts the second graduation line 168. Tighten the clamping screw 17 installed on the second support arm 182 to fix the position of the gauge 50.

[0090] Step S6: Apply a force of less than 0.25 Nm at the force application position 231 of the differential device 23 to rotate all the first gears 21 and the second gears 22 to the right, and adjust the pointer of the detection meter to the "0" position.

[0091] Step S7: Apply a force of less than 0.25 Nm at the force application position 231 to rotate all the first gears 21 and second gears 22 to the left to their limit, and record the readings on the test gauges respectively; apply a force of 0.25 Nm again at the force application device 231 to rotate all the first gears 21 and second gears 22 to the right to their limit, and record the readings on the test gauges respectively; half of the test gauge readings after left and right rotations are between 0.02 and 0.05 mm, which is the qualified tooth flank clearance of each gear.

[0092] Step S8: Loosen the clamping screw 9 in the opposite direction to move the clamping block 8 away from the fourth plate 44 to release the gear shaft of the first gear 21. Then rotate the differential device 23 so that the end face of the gear shaft of the other first gear 21 on it is close to the first clamping surface 45, and repeat steps four and seven.

[0093] Step S9: Release the clamping block 8, release the two center seats 13, and remove the differential device 23.

[0094] Step S10: Based on the test results and the technical conditions of the transmission, adjust the washer thickness and shaft of the planetary gear transmission appropriately, and then lock them with the locking screw; or adjust the gear end nuts to ensure that the backlash of all gear teeth is within 0.02 to 0.05 mm, and fix it with punch points at the corresponding positions. Test complete.

[0095] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A detection device for a landing gear gearbox differential, characterized in that, The system includes a base (1), a first clamping mechanism (20) disposed at one end of the base (1) in a top-and-clip manner, and a second clamping mechanism (30) disposed at the other end of the base (1) in a top-and-clip manner. The first clamping mechanism (20) and the second clamping mechanism (30) are slidably connected to the base (1) in the X direction, so that the first clamping mechanism (20) and the second clamping mechanism (30) can output relative top clamping forces. The base (1) is also provided with a third clamping mechanism (40) that outputs clamping force in the Y direction. The X direction is perpendicular to the Y direction. The direction has an acute angle α. A measuring gauge (50) is provided on the side of both the first clamping mechanism (20) and the second clamping mechanism (30) and is mounted in a rotating manner. The first clamping mechanism (20) has a first graduation (38) that contacts the probe of the adjacent measuring gauge (50). The second clamping mechanism (30) has a second graduation (168) that contacts the probe of the adjacent measuring gauge (50). The height of the first graduation (38) and the second graduation (168) is equal to d. vn d vn =Zvn.m nm , where d vn The pitch circle diameter is m. nm Zvn is the normal module; Zvn is the number of teeth; the probes of the two test gauges (40) are in contact with the first gradation (38) and the second gradation (168) respectively.

2. The detection device for the landing gear gearbox differential device according to claim 1, characterized in that, The base (1) includes a base plate (101), on which a guide rail (104) and a mounting plate (103) are provided. The guide rail (104) is located at both ends in the X direction. The mounting plate (103) is located in the middle of the base plate (101). Each end of the guide rail (104) is provided with a through waist-shaped groove (105). A locking member (14) for limiting the sliding position of the first clamping mechanism (20) or the second clamping mechanism (30) is installed in the waist-shaped groove (105). The third clamping mechanism (40) is mounted on the mounting plate (103).

3. The detection device for the landing gear gearbox differential according to claim 2, characterized in that, The waist-shaped groove (105) has a recessed platform on the side away from the guide rail (104) to form a fixed surface E. The locking member (14) has an end face F, which abuts against the fixed surface E.

4. The detection device for the landing gear gearbox differential according to claim 1, characterized in that, The first clamping mechanism (20) includes a top seat (13), a first top (2) located at the upper end of the top seat (13), and a first clamp (3) located on the side of the top seat (13). The second clamping mechanism (30) includes a top seat (13), a second top (12) located at the upper end of the top seat (13), and a second clamp (16) located on the side of the top seat (13). The two top seats (13) are slidably connected to the base (1), and the first top (2) and the second top (12) are arranged opposite each other in the X direction; the first scribe line (38) is provided on the first clamp (3); the second scribe line (168) is provided on the second clamp (16).

5. The detection device for the landing gear gearbox differential according to claim 4, characterized in that, The top plate (13) includes a seventh plate (131), a slider (133) located at the bottom of the seventh plate (131), and an eighth plate (132) vertically located at the top of the seventh plate (131). The slider (133) is slidably connected to the base (1), and the eighth plate (132) is used to install the first top plate (2) or the second top plate (12).

6. The detection device for the landing gear gearbox differential according to claim 5, characterized in that, The eighth plate (132) is provided with a conical hole (135) that runs through in the X direction. The small ends of the conical holes (135) on the two eighth plates (132) on the base (1) are arranged close to each other. A first tip (2) or a second tip (12) is installed in the conical hole (135).

7. The detection device for the landing gear gearbox differential according to claim 4, characterized in that, The first clamp (3) includes a first plate (31), a first clamping arm (32) connected to the end of the first plate (31) and forming a first clamping cavity (33), and two first ear plates (34) formed at the end of the first clamping arm (32). A first gap (37) is formed between the two first ear plates (34). One of the first ear plates (34) is provided with a first screw hole (34), and the other first ear plate (34) is provided with a first light hole (26). A clamping bolt (17) for connecting with the first screw hole (34) is installed in the first light hole (26). The first engraving line (38) is provided on the first plate (31). The first plate (31) is eccentrically set on the first clamping arm (32). The second clamp (16) includes a ninth plate (161), a second clamping arm (162) connected to the end of the ninth plate (161) and forming a second clamping cavity (163), and two second ear plates (164) formed at the end of the second clamping arm (162). A second gap (167) is formed between the two second ear plates (164). One of the second ear plates (164) is provided with a second screw hole (165), and the other second ear plate (164) is provided with a second light hole (166). A clamping bolt (17) for connecting with the second screw hole (165) is installed in the second light hole (166). The second engraving line (168) is provided on the ninth plate (161). The ninth plate (161) is eccentrically set on the second clamping arm (162).

8. The detection device for the landing gear gearbox differential according to claim 1, characterized in that, The third clamping mechanism (40) includes a first support plate (4), a second support plate (11) and a clamping block (8). The first support plate (4) and the second support plate (11) are connected to each other and simultaneously connected to the base (1). A clamping cavity is formed between the first support plate (4) and the second support plate (11) that are connected. The clamping block (8) is slidably placed in the clamping cavity in the Y direction.

9. A method for testing a landing gear gearbox differential, comprising using the testing device for a landing gear gearbox differential as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: The part that the first clamping mechanism (20) can clamp is mounted on the gear shaft (7), and the part that the second clamping mechanism (30) can clamp is mounted on the outer diameter of the right end shaft (221) of the second gear (22); Step 2: Move the parts that the first clamping mechanism (20) and the second clamping mechanism (30) can clamp, so that the first clamping mechanism (20) and the second clamping mechanism (30) clamp the gear shaft (7) and the right end shaft (221) respectively; Step 3: Rotate the differential device (23) so that the end face of the gear shaft of one of the first gears (21) is close to one end of the third clamping mechanism (40); Step 4: Adjust the other end of the third clamping mechanism (40) so that both ends of the third clamping mechanism (40) clamp the gear shaft of the first gear (21); Step 5: Adjust the measuring instrument next to the first clamping mechanism (20) so that its head contacts the first graduation line (38), and adjust the measuring instrument next to the second clamping mechanism (30) so that its head contacts the second graduation line (168). Step six: Apply a force of less than 0.25 Nm at the force application position (231) of the differential device (23) to rotate all the first gears (21) and the second gears (22) to the right, and adjust the pointer of the test meter to the "0" position; Step 7: Apply a force of less than 0.25 Nm at the force application position (231) to rotate all the first gears (21) and second gears (22) to the left to their limit, and record the readings on the test gauges respectively; apply a force of 0.25 Nm again at the force application device (231) to rotate all the first gears (21) and second gears (22) to the right to their limit, and record the readings on the test gauges respectively; half of the readings on the test gauges after left and right rotations are between 0.02 and 0.05 mm, which is the qualified tooth flank clearance of each gear; Step 8: Loosen the other end of the third clamping mechanism (40) in step 4, and rotate the differential device (23) so that the end face of the gear shaft of the other first gear (21) on it is close to one end of the third clamping mechanism (40); Repeat steps four and seven; complete the test.

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