Differential testing device

Abstract

The utility model discloses a differential test device, which relates to the technical field of differential detection equipment and comprises a test platform box, a differential is arranged at the center of the top of the test platform box, and a positioning mechanism is fixedly mounted on the rear side of the top of the test platform box. Driving mechanisms are fixedly mounted on the front side, the left side and the right side of the top of the test platform box, a placement round hole penetrating to an inner cavity is formed in the center of the top of the test platform box, the differential mechanism is located above the placement round hole, and a motor is fixedly mounted in the center of the bottom of the inner wall of the test platform box; a first bevel gear is fixedly mounted on an output shaft of the motor. According to the utility model, through mutual cooperation of the motor, the bevel gear I, the driving rotating rod, the bevel gear II, the gear I and the driving mechanisms, one motor can be directly utilized to drive the driving mechanisms in three directions to drive three output shafts of the differential mechanism to rotate, so that the normal fatigue test is ensured, and the test cost is reduced at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of differential detection equipment, in particular to a differential test device. Background Art

[0002] The differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It is mainly composed of left and right half-shaft gears, two planetary gears and a gear rack. It is a component installed to adjust the speed difference between the left and right wheels. The fatigue life test of the automobile differential is generally carried out on a three-motor test bench in the form of a reducer assembly. The main motor inputs torque and speed to the input shaft of the reducer, and the other two motors control the torque and speed of the two output ends of the reducer respectively to realize the fatigue life test of the differential. The existing technology has the following problems:

[0003] Because the existing differential test bench can only test different output ends of the differential by installing different motors, and the number of test motors is large, which causes the problem of increased cost of the overall test device. At the same time, when the differential in the prior art is adjusted, it is necessary to install its position and the sizes of different models of transmissions are different, so it is impossible to perform static torque tests according to different models, which has certain limitations. Utility Model Content

[0004] The utility model provides a differential test device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A differential test device comprises a test platform box, wherein a differential is arranged at the top center of the test platform box, a positioning mechanism is fixedly installed on the top rear side of the test platform box, a driving mechanism is fixedly installed on the top front side and left and right sides of the test platform box, a circular hole for placement which penetrates into an inner cavity is opened at the top center of the test platform box, the differential is located above the circular hole for placement, a motor is fixedly installed at the bottom center of the inner wall of the test platform box, a bevel gear 1 is fixedly installed on the output shaft of the motor, gear 1 is movably installed at the front and back and left and right sides of the test platform box, three driving rotating rods are fixedly installed on one side of the gear 1 close to the test platform box, three driving rotating rods are passed through the inner cavity of the test platform box and are fixedly installed with bevel gear 2, and the three bevel gear 2s are all meshed with bevel gear 1.

[0007] A further improvement of the technical solution of the utility model lies in that: the three driving mechanisms all include fixed upright plates, the three fixed upright plates are fixedly connected to the top of the test platform box, the three fixed upright plates are movably installed with rotating shafts on one side close to the differential, the three rotating shafts have one end away from the differential respectively penetrate into the three fixed upright plates on one side away from the differential and are fixedly installed with gear 2, the three gear 2s are respectively meshed with the three gear 1s, the three rotating shafts have one side close to the differential fixedly installed with fixed boxes, the inner walls of the three fixed boxes are slidably connected to limiting plates, the three limiting plates have one side close to the differential fixedly installed with telescopic rods, the three telescopic rods have one end close to the differential penetrate into the fixed box on one side close to the differential and are fixedly installed with differential output shaft positioning boxes.

[0008] A further improvement of the technical solution of the utility model lies in that: the three output shafts at the front and rear and left and right sides of the differential are respectively located in the inner cavities of the three differential output shaft positioning boxes, threaded holes penetrating into the inner cavities of the differential output shaft positioning boxes are provided on both sides of the three differential output shaft positioning boxes, and threaded rods are installed on the inner threads of the threaded holes, and knobs are fixedly installed on the ends of the two threaded rods away from the differential output shaft positioning box, and arc-shaped clamps are movably installed on the ends of the two threaded rods extending into the inner cavities of the differential output shaft positioning boxes, and extended straight plates are fixedly installed on the upper and lower ends of the two arc-shaped clamps, and one side of the two extended straight plates away from the arc-shaped clamps overlaps with the upper and lower sides of the inner wall of the differential output shaft positioning box, and the two arc-shaped clamps are respectively located on the left and right sides of the differential output shaft extending into the inner cavities of the differential output shaft positioning box, and rubber pads are fixedly installed on the opposite surfaces of the two arc-shaped clamps.

[0009] A further improvement of the technical solution of the utility model is that: the positioning mechanism includes a clamping vertical plate, the bottom of the clamping vertical plate is fixedly connected to the top of the test platform box, a slide groove is opened on the front side of the clamping vertical plate, a lifting screw rod is movably installed on the bottom of the inner wall of the slide groove, the top of the lifting screw rod passes through the top of the clamping vertical plate and is fixedly installed with a rotating handle, a lifting block is threadedly installed on the outer wall of the lifting screw rod, a clamping plate is fixedly installed on the front side of the lifting block, a differential cover cap is fixedly installed on the bottom of the clamping plate, and the differential cover cap is located above the differential.

[0010] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0011] 1. The utility model provides a differential test device, which can directly use a motor to drive the driving mechanism in three directions to drive the three output shafts of the differential to rotate through the mutual cooperation of the motor, bevel gear 1, driving rod, bevel gear 2, gear 1, and driving mechanism, so as to ensure the normal progress of fatigue test while reducing the test cost.

[0012] 2. The utility model provides a differential test device. Through the mutual cooperation between the positioning mechanism, the placement circular hole and the differential output shaft positioning box included in the driving mechanism, the overall test device can adapt to different lengths and diameters of the differential output shaft and can be positioned, thereby improving the applicability of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the test platform of the utility model structure when viewed from above;

[0015] Figure 3 It is a schematic diagram of the driving mechanism of the structure of the utility model;

[0016] Figure 4 It is a cross-sectional schematic diagram of a differential output shaft positioning box of the utility model structure;

[0017] Figure 5 It is a cross-sectional schematic diagram of the positioning mechanism of the utility model structure.

[0018] In the figure: 1. test platform box; 11. placement circular hole; 12. motor; 121. bevel gear one; 13. driving rod; 131. bevel gear two; 132. gear one; 2. differential; 3. driving mechanism; 31. fixed vertical plate; 32. gear two; 33. rotating shaft; 34. fixed box; 35. limit plate; 36. telescopic rod; 37. differential output shaft positioning box; 371. threaded hole; 372. threaded rod; 373. knob; 374. arc clamping plate; 375. extension straight plate; 376. rubber pad; 4. positioning mechanism; 41. clamping vertical plate; 42. slide groove; 43. lifting screw rod; 44. rotating handle; 45. lifting block; 46. clamping plate; 47. differential cover cap. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1 , Figure 2 , Figure 3As shown, the utility model provides a differential test device, including a test platform box 1, a differential 2 is arranged at the top center of the test platform box 1, a positioning mechanism 4 is fixedly installed on the top rear side of the test platform box 1, a driving mechanism 3 is fixedly installed on the top front side and left and right sides of the test platform box 1, a placement circular hole 11 penetrating to the inner cavity is opened at the top center of the test platform box 1, the differential 2 is located above the placement circular hole 11, a motor 12 is fixedly installed at the bottom center of the inner wall of the test platform box 1, a bevel gear 121 is fixedly installed on the output shaft of the motor 12, a gear 132 is movably installed at the front and back and left and right sides of the test platform box 1, a driving rotating rod 13 is fixedly installed on one side of the three gears 132 close to the test platform box 1, the three driving rotating rods 13 are all close to the side of the test platform box 1 through the inner cavity of the test platform box 1 and are fixedly installed with a bevel gear 2 131, and the three bevel gears 2 131 are all connected with the bevel gear 121 meshing, the three driving mechanisms 3 all include fixed upright plates 31, the three fixed upright plates 31 are all fixedly connected to the top of the test platform box 1, the three fixed upright plates 31 are all movably installed with rotating shafts 33 on one side close to the differential 2, the three rotating shafts 33 are respectively penetrated to the side of the three fixed upright plates 31 away from the differential 2 at one end and are fixedly installed with gear 2 32, the three gear 2 32 are respectively meshed with the three gear 1 132, the three rotating shafts 33 are respectively fixedly installed with fixed boxes 34 on one side close to the differential 2, the inner walls of the three fixed boxes 34 are all slidably connected with limit plates 35, the three limit plates 35 are respectively fixedly installed with telescopic rods 36 on one side close to the differential 2, when the telescopic rods 36 are pulled, the limit plates 35 can be used to prevent them from falling off, so as to adapt to output shafts of different lengths, the three telescopic rods 36 are respectively penetrated to the side of the fixed box 34 close to the differential 2 at one end and are fixedly installed with differential output shaft positioning boxes 37;

[0021] After fixing the output shaft of the differential 2, the motor 12 at the bottom of the inner wall of the test platform box 1 can be directly started to drive the bevel gear 1 121 to rotate. The engagement of the bevel gear 1 121 with the three bevel gear 2s 131 can drive the three driving rods 13 and the gear 1 132 on the front side and the left and right sides of the test platform box 1 to rotate. The engagement of the gear 1 132 with the gear 2 32 can be used to drive the rotating shaft 33 to drive the overall fixed box 34 to rotate. The telescopic rod 36 at the front end of the fixed box 34 and the differential output shaft positioning box 37 that fixes the output shaft of the differential 2 can be used to simultaneously drive the three output shafts of the differential 2 to rotate, and a long-term fatigue test can be performed.

[0022] like Figure 4As shown, the three output shafts at the front and rear and left and right sides of the differential 2 are respectively located in the inner cavities of the three differential output shaft positioning boxes 37. Both sides of the three differential output shaft positioning boxes 37 are provided with threaded holes 371 penetrating into the inner cavities of the differential output shaft positioning boxes 37, and the inner circles of the threaded holes 371 are threadedly installed with threaded rods 372. The ends of the two threaded rods 372 away from the differential output shaft positioning boxes 37 are fixedly installed with knobs 373. The two threaded rods 372 extend into the differential output shaft positioning boxes 37. An arc-shaped clamping plate 374 is movably mounted at one end of the inner cavity of the positioning box 37, and an extended straight plate 375 is fixedly mounted at the upper and lower ends of the two arc-shaped clamping plates 374. The side of the two extended straight plates 375 away from the arc-shaped clamping plates 374 overlaps with the upper and lower sides of the inner wall of the differential output shaft positioning box 37. The two arc-shaped clamping plates 374 are respectively located on the left and right sides of the differential 2 output shaft extending into the inner cavity of the differential output shaft positioning box 37, and the opposite surfaces of the two arc-shaped clamping plates 374 are fixedly mounted with rubber pads 376.

[0023] The three output shafts of the differential 2 are respectively inserted into the inner cavities of the three differential output shaft positioning boxes 37 by pulling the three differential output shaft positioning boxes 37, and the knobs 373 on both sides of the three differential output shaft positioning boxes 37 are rotated, thereby driving the threaded rod 372 to stably move toward the inner cavity of the differential output shaft positioning box 37 by utilizing the threaded connection with the threaded hole 371, and driving the arc clamping plate 374 to slide in the differential output shaft positioning box 37 by utilizing the upper and lower extended straight plates 375, so as to clamp and fix the output shaft of the differential 2, and at the same time cooperate with the rubber pad 376 to increase the friction between the arc clamping plate 374 and the outer wall of the output shaft after clamping, thereby improving the clamping stability, and the movable arc clamping plate 374 can adapt to output shafts of different thicknesses, thereby improving the applicability of the test device.

[0024] like Figure 5 As shown, the positioning mechanism 4 includes a clamping plate 41, the bottom of the clamping plate 41 is fixedly connected to the top of the test platform box 1, a slide groove 42 is opened on the front side of the clamping plate 41, a lifting screw rod 43 is movably installed at the bottom of the inner wall of the slide groove 42, the top of the lifting screw rod 43 passes through the top of the clamping plate 41 and is fixedly installed with a rotating handle 44, a lifting block 45 is threadedly installed on the outer wall of the lifting screw rod 43, a clamping plate 46 is fixedly installed on the front side of the lifting block 45, a differential cover cap 47 is fixedly installed at the bottom of the clamping plate 46, and the differential cover cap 47 is located above the differential 2;

[0025] After the differential 2 is placed on the circular hole 11 on the top of the test platform box 1 using the arc shape at the bottom, the rotating handle 44 on the top of the clamping vertical plate 41 is rotated to drive the lifting screw 43 to rotate in the slide groove 42, so that the lifting block 45 drives the clamping plate 46 to descend, and the circular differential cap 47 at the bottom of the clamping plate 46 is used to squeeze, clamp and fix the arc surface on the top of the differential.

[0026] The working principle of the differential test device is described in detail below.

[0027] like Figure 1-5 As shown, after the differential 2 is placed on the placement circular hole 11 on the top of the test platform box 1 using the arc shape at the bottom, the rotating handle 44 on the top of the clamping vertical plate 41 is rotated to drive the lifting screw 43 to rotate in the slide groove 42, so that the lifting block 45 drives the clamping plate 46 to descend, and the circular differential cap 47 at the bottom of the clamping plate 46 is used to squeeze and clamp the arc surface of the top of the differential, and then the three differential output shaft positioning boxes 37 are pulled to make the three output shafts of the differential 2 inserted into the inner cavities of the three differential output shaft positioning boxes 37 respectively, and the knobs 373 on both sides of the three differential output shaft positioning boxes 37 are rotated, so as to drive the threaded rod 372 to stably move toward the inner cavity of the differential output shaft positioning box 37 by using the threaded connection with the threaded hole 371, and drive the arc clamping plate 374 to use the upper and lower two extended straight plates 375 to move in the differential output The output shaft slides in the output shaft positioning box 37, thereby clamping and fixing the output shaft of the differential 2, and at the same time, the rubber pad 376 is used to increase the friction between the arc clamping plate 374 and the outer wall of the output shaft after clamping, thereby improving the clamping stability. After the output shaft is fixed, the motor 12 at the bottom of the inner wall of the test platform box 1 can be directly started to drive the bevel gear 121 to rotate, and the engagement of the bevel gear 121 with the three bevel gears 131 can drive the three driving rods 13 and the gears 132 on the front side and the left and right sides of the test platform box 1 to rotate, and the engagement of the gear 1 132 with the gear 2 32 can drive the shaft 33 to drive the overall fixed box 34 to rotate, and cooperate with the telescopic rod 36 at the front end of the fixed box 34 and the differential output shaft positioning box 37 that fixes the output shaft of the differential 2, thereby driving the three output shafts of the differential 2 to rotate at the same time, and performing a long-term fatigue test.

[0028] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A differential test device, comprising a test platform box (1), characterized in that: A differential (2) is arranged at the top center of the test platform box (1), a positioning mechanism (4) is fixedly installed at the top rear side of the test platform box (1), a driving mechanism (3) is fixedly installed at the top front side and left and right sides of the test platform box (1), a placement circular hole (11) penetrating to the inner cavity is opened at the top center of the test platform box (1), the differential (2) is located above the placement circular hole (11), and a motor (12) is fixedly installed at the bottom center of the inner wall of the test platform box (1), the motor The output shaft of the test platform box (12) is fixedly installed with a bevel gear one (121), and the front and rear and left and right sides of the test platform box (1) are movably installed with gears one (132), and the three gears one (132) are fixedly installed with driving rods (13) on one side close to the test platform box (1), and the three driving rods (13) are inserted into the inner cavity of the test platform box (1) and are fixedly installed with bevel gears two (131), and the three bevel gears two (131) are meshed with bevel gear one (121).

2. A differential test device according to claim 1, characterized in that: The three driving mechanisms (3) each include a fixed vertical plate (31), the three fixed vertical plates (31) are fixedly connected to the top of the test platform box (1), a rotating shaft (33) is movably installed on one side of the three fixed vertical plates (31) close to the differential (2), one end of the three rotating shafts (33) away from the differential (2) respectively penetrates to one side of the three fixed vertical plates (31) away from the differential (2) and is fixedly installed with a second gear (32), the three second gears (32) are respectively connected to the three first gears ( 132) are engaged, a fixing box (34) is fixedly installed on one side of the three rotating shafts (33) close to the differential (2), the inner walls of the three fixing boxes (34) are slidably connected to a limiting plate (35), a telescopic rod (36) is fixedly installed on one side of the three limiting plates (35) close to the differential (2), and one end of the three telescopic rods (36) close to the differential (2) passes through the fixing box (34) close to the differential (2) and is fixedly installed with a differential output shaft positioning box (37).

3. A differential test device according to claim 1, characterized in that: The three output shafts at the front and rear and left and right sides of the differential (2) are respectively located in the inner cavities of the three differential output shaft positioning boxes (37). The two sides of the three differential output shaft positioning boxes (37) are provided with threaded holes (371) penetrating into the inner cavities of the differential output shaft positioning boxes (37), and the inner circles of the threaded holes (371) are threadedly mounted with threaded rods (372). The ends of the two threaded rods (372) away from the differential output shaft positioning boxes (37) are fixedly mounted with knobs (373). The two threaded rods (372) extend into the differential output shaft positioning boxes ( An arc-shaped clamping plate (374) is movably installed at one end of the inner cavity of the two arc-shaped clamping plates (374), and an extended straight plate (375) is fixedly installed at the upper and lower ends of the two arc-shaped clamping plates (374). The side of the two extended straight plates (375) away from the arc-shaped clamping plates (374) overlaps the upper and lower sides of the inner wall of the differential output shaft positioning box (37), and the two arc-shaped clamping plates (374) are respectively located on the left and right sides of the differential (2) output shaft extending into the inner cavity of the differential output shaft positioning box (37), and the opposite surfaces of the two arc-shaped clamping plates (374) are fixedly installed with rubber pads (376).

4. A differential test device according to claim 1, characterized in that: The positioning mechanism (4) includes a clamping plate (41), the bottom of which is fixedly connected to the top of the test platform box (1), a slide groove (42) is provided on the front side of the clamping plate (41), a lifting screw (43) is movably installed at the bottom of the inner wall of the slide groove (42), the top of the lifting screw (43) passes through the top of the clamping plate (41) and is fixedly installed with a rotating handle (44), a lifting block (45) is threadedly installed on the outer wall of the lifting screw (43), a clamping plate (46) is fixedly installed on the front side of the lifting block (45), and a differential cover cap (47) is fixedly installed at the bottom of the clamping plate (46), and the differential cover cap (47) is located above the differential (2).

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