Differential impact fatigue test bench

Abstract

The utility model discloses a differential mechanism impact fatigue test bench, and specifically relates to the differential mechanism test equipment field, the differential mechanism impact fatigue test bench comprises a main body, the left part of the main body is fixedly connected with a driving assembly I, the outer surface of the driving assembly I is slidably connected with a moving assembly, and one part, close to each other, of the two moving assemblies is rotatably connected with an experiment assembly; the right portion of the body is fixedly connected with a second driving assembly, and an inner cavity of the body is rotationally connected with a transmission assembly. According to the differential impact fatigue test bench, the relative position can be adjusted through the designed driving assembly I and the moving assembly, so that the flange plate and the input / output shaft of the differential can be ensured to be strictly aligned with the main shaft of the testing machine, and the interference of additional bending moment on the test result is avoided; meanwhile, the flange connection mode is consistent with that of a real vehicle transmission system, the stress state of the differential in a real vehicle can be reproduced, the test piece can be quickly disassembled and assembled through a flange standardized interface, and the test efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of differential testing equipment, and in particular to a differential impact fatigue testing bench. Background Technology

[0002] A car differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It mainly consists of left and right half-shaft gears, two planetary gears, and a gear carrier. Its function is to enable the left and right wheels to roll at different speeds when the car is turning or driving on uneven roads, thus ensuring that the drive wheels on both sides perform pure rolling motion.

[0003] Currently, domestic differential testing relies on drive axle and reducer testing. There are few standards for impact testing of individual differential units and designs for differential impact test benches. Existing test benches cannot meet the requirements for simulating the inertial force of translational mass of different vehicle weights during braking. The application scope of the test benches is small, the testing efficiency is low, and the replacement, disassembly and installation of differential test pieces are not flexible enough. Therefore, we propose a differential impact fatigue test bench to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a differential impact fatigue test bench, which can effectively solve the problems of limited application range and insufficient flexibility in disassembly and installation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A differential impact fatigue test bench includes a main body, a drive assembly one fixedly connected to the left side of the main body, a moving assembly slidably connected to the outer surface of the drive assembly one, an experimental assembly rotatably connected to a portion of the two moving assemblies that are close to each other, a drive assembly two fixedly connected to the right side of the main body, and a transmission assembly rotatably connected to the inner cavity of the main body.

[0007] Preferably, the main body includes a base, and support legs are fixedly connected to the four corners of the lower end of the base.

[0008] Preferably, the drive assembly includes a motor, the right end of which is fixedly connected to the left end of the base, and the output end of the motor is fixedly connected to a bidirectional threaded rod via a coupling. A guide rod is fixedly connected to the rear part of the left and right side walls of the inner cavity of the base.

[0009] Preferably, the movable component includes two sliding bases, the lower holes of the two sliding bases are slidably connected to the outer surface of the bidirectional threaded rod and the outer surface of the guide rod, the upper ends of the two sliding bases are fixedly connected to a fixing plate, and the upper ends of the two sliding bases are fixedly connected to a support plate.

[0010] Preferably, the experimental assembly includes rotating shafts, with the ends of two rotating shafts located away from each other rotatably connected to the ends of two sliding bases located in the same part that are close to each other. Each of the ends of the two rotating shafts that are close to each other is fixedly connected to a flange. Each of the ends of the two flanges located away from each other is fixedly connected to a pulley 1 via a shaft. A gear 1 is rotatably connected to the left end of the sliding base 2 located on the left side. A pulley 2 is fixedly connected to the left end of the gear 1. A belt 1 is wound around the outer surfaces of the pulley 1 and the pulley 2. A sliding gear 2 is also meshed with the outer surface of the gear 1.

[0011] Preferably, the second drive assembly includes a second motor, the left end of which is fixedly connected to the right end of the first base, the output end of the second motor is fixedly connected to a third gear via a coupling, the outer surface of the third gear is meshed with a fourth gear, and several mating rods are fixedly connected to the left ends of both the third gear and the fourth gear.

[0012] Preferably, the transmission assembly includes a gear five, the right end of which is rotatably connected to the right side wall of the inner cavity of the base one, the left end of which is fixedly connected to a rotating rod, the inner cavity of which is slidably connected to a sliding pulley three, and the outer surface of the sliding pulley three and the outer surface of the pulley one located on the right are together wound with a belt two.

[0013] Preferably, the left and right ends of the bidirectional threaded rod are rotatably connected to the left and right side walls of the inner cavity of the base, the inner surface of the sliding gear is slidably connected to the inner cavity of the rotating rod, and the plurality of mating rods are meshed with the gear five. The left end of the rotating rod is rotatably connected to the left side wall of the inner cavity of the base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model, through the setting of the drive component and the moving component, can ensure that the input / output shafts of the flange and the differential are strictly aligned with the main shaft of the testing machine by adjusting their relative positions, so as to avoid additional bending moment interfering with the test results. At the same time, the flange connection method is consistent with the actual vehicle transmission system, which can reproduce the stress state of the differential in a real vehicle. Furthermore, the standardized flange interface can realize the quick disassembly and assembly of the specimen, improving the testing efficiency.

[0016] 2. This utility model, through the set experimental components, drive component two and transmission components, can realize alternating loading to reproduce the stress cycle characteristics caused by torque direction switching, accurately evaluate the fatigue life and failure mode of the differential under alternating load, and the alternating forward and reverse rotation will form a symmetrical shear stress field in the differential, causing the micro cracks inside the material to propagate faster under bidirectional stress, exposing potential defects in advance. At the same time, the failure location and crack propagation path of the alternating test are highly consistent with the actual vehicle failure, avoiding atypical failures caused by unidirectional loading. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0019] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 For the present utility model Figure 3 Enlarged diagram of point B in the middle.

[0022] In the diagram: 1. Main body; 11. Base 1; 12. Support leg; 2. Moving component; 21. Sliding base 2; 22. Fixing plate; 23. Support plate; 3. Experimental component; 31. Rotating shaft; 32. Flange; 33. Pulley 1; 34. Belt 1; 35. Pulley 2; 36. Gear 1; 37. Sliding gear 2; 4. Drive component 1; 41. Motor 1; 42. Bidirectional threaded rod; 43. Guide rod; 5. Drive component 2; 51. Motor 2; 52. Gear 3; 53. Gear 4; 54. Matching rod; 6. Transmission component; 61. Gear 5; 62. Rotating rod; 63. Sliding pulley 3; 64. Belt 2. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Example 1, as Figure 1As shown, a differential impact fatigue test bench includes a main body 1. A drive assembly 4 is fixedly connected to the left side of the main body 1. A moving assembly 2 is slidably connected to the outer surface of the drive assembly 4. An experimental assembly 3 is rotatably connected to a part of the two moving assemblies 2 that are close to each other. A drive assembly 5 is fixedly connected to the right side of the main body 1. A transmission assembly 6 is rotatably connected to the inner cavity of the main body 1.

[0025] In implementing this scheme, the operator first installs the differential on one of the test components 3. Then, the operator activates drive component 1 4 to make the moving component 2 slide, allowing the two test components 3 to move closer to each other so that the other test component 3 and the differential come into contact. At this point, the operator can fix the differential on the other test component 3. After that, the operator activates drive component 2 5, which drives the transmission component 6 and the test component 3 to rotate, thereby causing the test component 3 to alternately rotate forward and backward, simulating the repeated torque in actual working conditions, thus realizing the impact fatigue test of the differential.

[0026] Specifically, in order to fix the differential, such as Figure 1 As shown, in this scheme, the main body 1 includes a base 11, and support legs 12 are fixedly connected to the four corners of the lower end of the base 11.

[0027] For further details, please refer to [link / reference]. Figure 3 The drive assembly 4 includes a motor 41, the right end of which is fixedly connected to the left end of the base 11. The output end of the motor 41 is fixedly connected to a bidirectional threaded rod 42 via a coupling. A guide rod 43 is fixedly connected to the rear of the left and right sides of the inner cavity of the base 11.

[0028] For further details, please refer to [link / reference]. Figure 2 The movable component 2 includes two sliding bases 21. The lower holes of the two sliding bases 21 are slidably connected to the outer surface of the bidirectional threaded rod 42 and the outer surface of the guide rod 43. The upper ends of the two sliding bases 21 are fixedly connected to a fixing plate 22 and a support plate 23.

[0029] For further details, please refer to [link / reference]. Figure 3 and Figure 4 Experimental component 3 includes a rotating shaft 31. The ends of the two rotating shafts 31 that are far apart from each other are rotatably connected to the ends of the sliding base 21 located in the same part that are close to each other. The ends of the two rotating shafts 31 that are close to each other are fixedly connected to a flange 32. The ends of the two flanges 32 that are far apart from each other are fixedly connected to a pulley 33 via a shaft. The left end of the sliding base 21 located on the left is rotatably connected to a gear 36. The left end of the gear 36 is fixedly connected to a pulley 35. The outer surfaces of the pulley 33 and the pulley 35 are connected together by a belt 34. The outer surface of the gear 36 is also meshed with a sliding gear 37.

[0030] When implementing this solution, the operator first installs the differential on one of the flanges 32, then starts the motor 41 to drive the double-threaded rod 42 to rotate, which in turn causes the sliding base 21 to slide on the guide rod 43, allowing the two flanges 32 to move closer to each other, so that the other flange 32 comes into contact with the differential. At this point, the operator can fix the differential on the other flange 32.

[0031] Example 2, based on Example 1, allows for dynamic torsional fatigue testing of the differential.

[0032] Specifically, in order to conduct dynamic torsional fatigue tests on the differential, such as Figure 3 and Figure 5 As shown, in this scheme, the drive component 2 5 includes a motor 2 51. The left end of the motor 2 51 is fixedly connected to the right end of the base 1 11. The output end of the motor 2 51 is fixedly connected to a gear 3 52 through a coupling. The outer surface of the gear 3 52 is meshed with a gear 4 53. Several mating rods 54 are fixedly connected to the left end of both the gear 3 52 and the gear 4 53.

[0033] For further details, please refer to [link / reference]. Figure 5 The transmission assembly 6 includes a gear 61, the right end of which is rotatably connected to the right side wall of the inner cavity of the base 11, and a rotating rod 62 is fixedly connected to the left end of the gear 61. A sliding pulley 63 is slidably connected to the inner cavity of the rotating rod 62. A belt 64 is wound around the outer surface of the sliding pulley 63 and the outer surface of the pulley 33 located on the right.

[0034] For further details, please refer to [link / reference]. Figure 5 The left and right ends of the bidirectional threaded rod 42 are rotatably connected to the left and right side walls of the inner cavity of the base 11. The inner surface of the sliding gear 2 37 is slidably connected to the inner cavity of the rotating rod 62. Several mating rods 54 are meshed with the gear 5 61. The left end of the rotating rod 62 is rotatably connected to the left side wall of the inner cavity of the base 11.

[0035] During implementation, the operator starts motor 2 51 to drive gear 3 52, gear 4 53, mating rod 54, gear 5 61 and rotating rod 62 to alternate forward and reverse rotation, which in turn drives sliding gear 2 37, belt 1 34, belt 2 64 and pulley 1 33 to alternate forward and reverse rotation. Ultimately, the rotating shaft 31 drives the flange 32 and differential to alternate forward and reverse rotation, thereby simulating the repeated torque in actual working conditions and realizing the impact fatigue test of the differential.

[0036] In summary, the implementation process of this utility model is as follows:

[0037] The operator first installs the differential on one of the flanges 32, then starts the motor 41 to drive the double-threaded rod 42 to rotate, which in turn causes the sliding base 21 to slide on the guide rod 43, allowing the two flanges 32 to move closer to each other, so that the other flange 32 comes into contact with the differential. At this point, the operator can fix the differential on the other flange 32.

[0038] The operator then starts motor 2 51 to drive gear 3 52, gear 4 53, mating rod 54, gear 5 61 and rotating rod 62 to alternate forward and reverse rotation, which in turn drives sliding gear 2 37, belt 1 34, belt 2 64 and pulley 1 33 to alternate forward and reverse rotation, ultimately enabling the rotating shaft 31 to drive the flange 32 and differential to alternate forward and reverse rotation, thereby simulating the repeated torque in actual working conditions, and thus realizing the impact fatigue test of the differential.

[0039] It should be noted that the specific installation methods, circuit connection methods, and control methods of motor 41 and motor 51 used in this utility model are all conventional designs, and will not be described in detail here.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A differential impact fatigue test bench, comprising a main body (1), characterized in that: The main body (1) is fixedly connected to the left side of the drive assembly one (4), the outer surface of the drive assembly one (4) is slidably connected to the moving assembly (2), the two moving assemblies (2) are rotatably connected to the experimental assembly (3) at a part close to each other, the main body (1) is fixedly connected to the right side of the drive assembly two (5), and the inner cavity of the main body (1) is rotatably connected to the transmission assembly (6).

2. The differential impact fatigue test bench according to claim 1, characterized in that: The main body (1) includes a base (11), and support legs (12) are fixedly connected to the four corners of the lower end of the base (11).

3. The differential impact fatigue test bench according to claim 2, characterized in that: The drive assembly (4) includes a motor (41), the right end of which is fixedly connected to the left end of the base (11), and the output end of the motor (41) is fixedly connected to a bidirectional threaded rod (42) via a coupling. The rear part of the left and right side walls of the inner cavity of the base (11) is fixedly connected to a guide rod (43).

4. The differential impact fatigue test bench according to claim 3, characterized in that: The moving component (2) includes two sliding bases (21). The lower holes of the two sliding bases (21) are slidably connected to the outer surface of the bidirectional threaded rod (42) and the outer surface of the guide rod (43). The upper ends of the two sliding bases (21) are fixedly connected to a fixing plate (22) and a support plate (23).

5. The differential impact fatigue test bench according to claim 4, characterized in that: The experimental component (3) includes a rotating shaft (31). The ends of the two rotating shafts (31) that are far apart from each other are rotatably connected to the ends of the sliding base (21) that are close to each other. The ends of the two rotating shafts (31) that are close to each other are fixedly connected to a flange (32). The ends of the two flanges (32) that are far apart from each other are fixedly connected to a pulley (33) through a shaft. The left end of the sliding base (21) located on the left is rotatably connected to a gear (36). The left end of the gear (36) is fixedly connected to a pulley (35). The outer surfaces of the pulley (33) and the pulley (35) are wound together with a belt (34). The outer surface of the gear (36) is also meshed with a sliding gear (37).

6. The differential impact fatigue test bench according to claim 5, characterized in that: The second drive assembly (5) includes a second motor (51), the left end of which is fixedly connected to the right end of the first base (11), the output end of the second motor (51) is fixedly connected to a third gear (52) via a coupling, the outer surface of the third gear (52) is meshed with a fourth gear (53), and the left ends of the third gear (52) and the fourth gear (53) are both fixedly connected with several mating rods (54).

7. A differential impact fatigue test bench according to claim 6, characterized in that: The transmission assembly (6) includes a gear five (61), the right end of which is rotatably connected to the right side wall of the inner cavity of the base one (11), and a rotating rod (62) is fixedly connected to the left end of the gear five (61). A sliding pulley three (63) is slidably connected to the inner cavity of the rotating rod (62). A belt two (64) is wound around the outer surface of the sliding pulley three (63) and the outer surface of the pulley one (33) located on the right.

8. The differential impact fatigue test bench according to claim 7, characterized in that: The left and right ends of the bidirectional threaded rod (42) are rotatably connected to the left and right side walls of the inner cavity of the base (11), the inner surface of the sliding gear (37) is slidably connected to the inner cavity of the rotating rod (62), and several of the mating rods (54) are meshed with the gear (61). The left end of the rotating rod (62) is rotatably connected to the left side wall of the inner cavity of the base (11).

Images