An automatic mechanical locking differential function test bench

Abstract

The present invention discloses an automatic mechanical locking differential function detection test bench, including an operating table, a support frame, a reduction motor, a torque limiter, a transmission shaft, a speed measuring mechanism and an electric control cabinet. The operating table is provided with a support frame, a reduction motor is provided on the top of the support frame, the reduction motor is connected to the transmission shaft through the torque limiter, the output end of the reduction motor and the transmission shaft are provided with a speed measuring mechanism, the lower end of the transmission shaft is used to connect the differential to be tested, and the reduction motor and the speed measuring mechanism are both electrically connected to the electric control cabinet. The present invention is designed and developed for the detection requirements of the automatic mechanical locking differential, and can perform preliminary running-in, differential function, locking function and unlocking function detection on the product offline, and can capture the locking speed difference when the half-axle gear is left fast and right slow and left slow and right fast respectively, which greatly improves the detection accuracy and efficiency of the product in actual production.

Description

Technical Field

[0001] The invention relates to the technical field of differential detection, in particular to an automatic mechanical locking differential function detection test bench. Background Art

[0002] Automatic mechanical locking differentials are increasingly used in different models of various car manufacturers. Therefore, it is particularly important to inspect and verify the functions of automatic mechanical locking differentials, especially the online inspection of products by relevant production factories.

[0003] A qualified automatic mechanical locking differential must first have normal differential function. The left and right half-axle gears must not get stuck or make abnormal noises during differential movement, and the starting torque must not be too high. Secondly, the locking part must be reliably locked at the set speed difference, and unlocked quickly when the unlocking conditions are met. Currently, there is no detection device that can perform a preliminary test on the automatic mechanical locking differential. Therefore, a detection device is urgently needed to determine whether the automatic mechanical locking differential meets the requirements of a qualified product. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic mechanical locking differential function detection test bench to solve the problems existing in the above-mentioned prior art, and to detect the differential and locking functions of the automatic mechanical locking differential to detect whether the product meets the design requirements.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an automatic mechanical locking differential function detection test bench, comprising an operating table, a supporting frame, a reduction motor, a torque limiter, a transmission shaft, a speed measuring mechanism and an electric control cabinet, wherein the supporting frame is arranged on the operating table, the reduction motor is arranged on the top of the supporting frame, the reduction motor is connected to the transmission shaft through the torque limiter, the speed measuring mechanism is arranged on the output end of the reduction motor and the transmission shaft, the lower end of the transmission shaft is used for connecting a differential to be tested, and the reduction motor and the speed measuring mechanism are both electrically connected to the electric control cabinet.

[0007] Preferably, the rotating shaft of the reduction motor is connected to a motor connecting disk, the torque limiter is a friction torque limiter, the lower end of the motor connecting disk is fixedly connected to the friction disk of the torque limiter, the main friction plate and pressure plate of the torque limiter are fixedly connected to the transmission shaft, and the friction plate is arranged between the main friction plate and pressure plate of the torque limiter.

[0008] Preferably, the speed measuring mechanism includes an electromagnet block and a speed sensor, two of the electromagnet blocks are symmetrically arranged on the side wall of the motor connecting disk and the transmission shaft, the speed sensor is respectively arranged at the upper and lower ends of the support frame, the speed sensor at the upper end corresponds to the horizontal position of the electromagnet block on the motor connecting disk, and the speed sensor at the lower end corresponds to the horizontal position of the electromagnet block on the transmission shaft, and the speed sensor is electrically connected to the electric control cabinet.

[0009] Preferably, a rectangular opening is provided on the upper surface of the operating table, a pair of guide rails are provided on both sides of the rectangular opening, a support panel is slidably provided on the guide rails, and the differential to be tested is fixed on the support panel.

[0010] Preferably, a hole is opened in the middle of the support panel and is connected to an oil cylinder, wherein the oil cylinder is used to accommodate the differential to be tested, and the flange of the differential to be tested is connected to the support panel by bolts.

[0011] Preferably, an oil control pool is provided on the upper surface of the operating table, and the bottom of the oil control pool is connected to the upper section of the oil cylinder.

[0012] Preferably, the support frame includes a support column and a rectangular frame, two support columns are provided on one side of the operating table, the tops of the support columns are connected to the rectangular frame, and the rectangular frame is provided with an upper surface and a lower surface.

[0013] Preferably, a vertical reduction motor is arranged on the upper surface, and a bearing is arranged on the lower surface, and the bearing is coaxial with the output shaft of the reduction motor.

[0014] Preferably, the transmission shaft is a stepped shaft, the large end of the transmission shaft is connected to the torque limiter, and the small end passes through the bearing and is connected to the output shaft of the differential to be tested through a spline connecting sleeve.

[0015] Preferably, the electric control cabinet is provided with a touch screen, a speed display, an indicator light, a forward button, a reverse button, a stop / reset button, an emergency stop switch, a manual switch and an automatic switch.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The present invention is designed and developed to meet the detection needs of automatic mechanical locking differentials. It can perform preliminary running-in, differential function, locking function and unlocking function detection on the product before it goes offline, and can capture the locking speed difference when the half-axle gears are in the cases where the left is fast and the right is slow, or the left is slow and the right is fast, respectively. This greatly improves the detection accuracy and efficiency of the product in actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The structure of the automatic mechanical locking differential function test bench of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The structure of the automatic mechanical locking differential function test bench of the present invention is shown in FIG. Figure 2 ;

[0021] Among them: 100-automatic mechanical locking differential function test bench, 1-operating table, 2-guide rail, 3-support panel, 4-oil control pool, 5-differential to be tested, 6-oil cylinder, 7-support column, 8-rectangular frame, 9-reduction motor, 10-torque limiter, 11-motor connecting plate, 12-drive shaft, 13-electromagnet block, 14-speed sensor, 15-spline connecting sleeve, 16-bearing, 17-electric control cabinet, 18-touch screen, 19-speed display, 20-indicator light. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide an automatic mechanical locking differential function detection test bench to solve the problems existing in the prior art and to detect the differential and locking functions of the automatic mechanical locking differential to detect whether the product meets the design requirements.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 to Figure 2As shown: This embodiment provides an automatic mechanical locking differential function detection test bench 100, including an operating table 1, a support frame, a reduction motor 9, a torque limiter 10, a transmission shaft 12, a speed measuring mechanism and an electric control cabinet 17. The operating table 1 is provided with a support frame, and a reduction motor 9 is provided on the top of the support frame. The reduction motor 9 is connected to the transmission shaft 12 through the torque limiter 10. The output end of the reduction motor 9 and the transmission shaft 12 are both provided with a speed measuring mechanism. The lower end of the transmission shaft 12 is used to connect the differential 5 to be tested. The reduction motor 9 and the speed measuring mechanism are both electrically connected to the electric control cabinet 17. In this embodiment, the differential 5 to be tested is an automatic mechanical locking differential.

[0026] The rotating shaft of the reduction motor 9 is connected to a motor connecting disk 11, and the torque limiter 10 is a friction torque limiter 10. The lower end of the motor connecting disk 11 is fixedly connected to the friction disk of the torque limiter 10, and the main friction plate and pressure plate of the torque limiter 10 are fixedly connected to the transmission shaft 12, and the friction plate is arranged between the main friction plate and pressure plate of the torque limiter 10.

[0027] The speed measuring mechanism includes an electromagnet block 13 and a speed sensor 14. Two electromagnet blocks 13 are symmetrically arranged on the side wall of the motor connection disk 11 and the transmission shaft 12. Because the rotation directions of the left and right half-axle gears of the differential 5 to be tested are opposite, and the two magnets 13 are symmetrically arranged, the speed displayed by the speed sensor 14 is twice the actual speed, which is exactly the actual speed difference between the left and right half-axle gears, so that the display reading is more intuitive. The upper and lower ends of the support frame are respectively provided with speed sensors 14. The speed sensor 14 at the upper end corresponds to the horizontal position of the electromagnet block 13 on the motor connection disk 11, and the speed sensor 14 at the lower end corresponds to the horizontal position of the electromagnet block 13 on the transmission shaft 12. The speed sensor 14 is electrically connected to the electric control cabinet 17.

[0028] The upper surface of the operating table 1 is provided with a rectangular opening, and a pair of guide rails 2 are provided on both sides of the rectangular opening. A support panel 3 is slidably provided on the guide rail 2, and the differential 5 to be tested is fixed on the support panel 3. The middle part of the support panel 3 is opened and connected to an oil cylinder 6, which is used to accommodate the differential 5 to be tested. The flange of the differential 5 to be tested is connected to the support panel 3 by bolts. The upper surface of the operating table 1 is provided with an oil control pool 4, and the bottom of the oil control pool 4 is connected to the upper section of the oil cylinder 6 through a hose. During the inspection, the differential 5 to be tested is placed in the oil cylinder 6. After the inspection, the differential 5 to be tested is placed in the oil control pool 4 to control the dry oil, so that the oil returns to the oil cylinder 6, avoiding waste and reducing the inspection cost.

[0029] The support frame includes a support column 7 and a rectangular frame 8. Two support columns 7 are arranged on one side of the operating table 1. The top of the support column 7 is connected to the rectangular frame 8. The rectangular frame 8 is provided with an upper surface and a lower surface. A vertical reduction motor 9 is arranged on the upper surface, and a bearing 16 is arranged on the lower surface. The bearing 16 is coaxial with the output shaft of the reduction motor 9. The transmission shaft 12 is a stepped shaft. The large end of the transmission shaft 12 is connected to the torque limiter 10, and the small end passes through the bearing 16 and is connected to an output end of the differential 5 to be tested through a spline connection sleeve 15. The output end is connected to the transmission shaft 12 through a flange.

[0030] The electric control cabinet 17 is provided with a touch screen 18, a speed display 19, an indicator light 20, a forward button, a reverse button, a stop / reset button, an emergency stop switch, a manual switch and an automatic switch. The electric control cabinet 17 can select two modes of manual operation and automatic operation. The speed of the running-in process, the maximum speed in the process of capturing the locking speed difference, the running-in operation time, the forward and reverse conversion interval time, and the unlocking operation time can be manually set through the touch screen 18 interface. The speed display 19 can display the speed of the reduction motor 9 and the transmission shaft 12 collected by the speed sensor 14 in real time.

[0031] When the automatic mechanical locking differential function detection test bench 100 of this embodiment is used, the manual operation mode is: after selecting the manual switch to start, press the forward button, the reduction motor 9 first rotates forward at a set low speed, and the forward running-in process of the differential 5 to be tested begins. During this period, if the differential 5 to be tested cannot rotate, is stuck, or makes abnormal noises, the emergency stop button can be pressed, and it can be judged that the differential structure or function is abnormal and the product is unqualified. Otherwise, the differential function is normal. When the reduction motor 9 has completed the set running-in time, the electric control cabinet 17 will control the reduction motor 9 to gradually accelerate to the set high speed. During this period, the differential 5 to be tested will be locked within the set locking speed range according to the setting of its own locking parameters. After locking, the half-axle gear and the housing of the differential 5 to be tested form a rigid connection, and the transmission shaft 12 will stop rotating. At this time (the moment of locking sound), the speed display 19 connected to the transmission shaft 12 just reaches its maximum value, and the value displayed by the speed display 19 connected to the motor connection plate 11 is the forward locking speed difference of the differential 5 to be tested. Press the reverse button again, the reduction motor 9 starts to reverse, repeat the above operation, and finally get the reverse locking speed difference. Finally, press the forward button again to start the reduction motor 9 and rotate forward for 10 seconds, so that the differential 5 to be tested can be unlocked. After the unlocking operation is completed, the entire inspection operation is completed.

[0032] Automatic operation mode: The only difference from the manual operation mode is that the automatic switch is selected, and there is no manual switch and button selection step. After the differential 5 to be tested is locked, the electric control cabinet 17 compares the speed value of the speed display 19 in real time. Once the speed difference is 5RPM, the control program determines that the differential 5 to be tested has locked, and directly displays the captured forward or reverse locking speed difference on the screen. The control program automatically sets the interval between the forward or reverse locking operation for a few seconds, and automatically performs the unlocking operation to complete the entire inspection operation, and performs an audio and visual prompt to complete the task.

[0033] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic mechanical locking differential function test bench, Features: It includes an operating table, a support frame, a reduction motor, a torque limiter, a transmission shaft, a speed measuring mechanism and an electric control cabinet. The operating table is provided with the support frame, the top of the support frame is provided with the reduction motor, the reduction motor is connected to the transmission shaft through the torque limiter, the output end of the reduction motor and the transmission shaft are both provided with the speed measuring mechanism, the lower end of the transmission shaft is used to connect the differential to be measured, and the reduction motor and the speed measuring mechanism are both electrically connected to the electric control cabinet; After selecting the manual switch for starting, press the forward button, the reduction motor first rotates forward at a set low speed to start the forward running-in process of the differential to be tested. During this period, if the differential to be tested cannot rotate, is stuck in rotation, or makes abnormal noises, press the emergency stop switch, and judge that the differential to be tested is abnormal and is an unqualified product. Otherwise, the differential to be tested functions normally. When the reduction motor completes the set running-in time, the electric control cabinet controls the reduction motor to gradually accelerate to the set high speed. During this period, the differential to be tested will lock within the set locking speed range according to the setting of its own locking parameters. After locking, the transmission shaft will stop rotating because the half-shaft gear and the housing of the differential to be tested form a rigid connection; at the moment of locking sound, the speed display connected to the transmission shaft just reaches its maximum value, and the value displayed by the speed display connected to the motor connecting plate is the forward locking speed difference of the differential to be tested; then press the reverse button, the reduction motor starts to reverse, repeat the above operation, and finally obtain the reverse locking speed difference; finally, press the forward button again to start the reduction motor and rotate forward for 10 seconds, so that the differential to be tested can be unlocked. After the unlocking operation is completed, the entire inspection operation is completed.

2. The automatic mechanical locking differential function test bench according to claim 1, Features: The rotating shaft of the reduction motor is connected to a motor connecting disk, the torque limiter is a friction torque limiter, the lower end of the motor connecting disk is fixedly connected to the friction disk of the torque limiter, the main friction plate and the pressure plate of the torque limiter are fixedly connected to the transmission shaft, and the friction plate is arranged between the main friction plate and the pressure plate of the torque limiter.

3. The automatic mechanical locking differential function test bench according to claim 2, Features: The speed measuring mechanism includes an electromagnet block and a speed sensor. Two electromagnet blocks are symmetrically arranged on the side wall of the motor connecting disk and the transmission shaft. The speed sensor is respectively arranged at the upper and lower ends of the supporting frame. The speed sensor at the upper end corresponds to the horizontal position of the electromagnet block on the motor connecting disk, and the speed sensor at the lower end corresponds to the horizontal position of the electromagnet block on the transmission shaft. The speed sensor is electrically connected to the electric control cabinet.

4. The automatic mechanical locking differential function test bench according to claim 1, Features: A rectangular opening is arranged on the upper surface of the operating table, a pair of guide rails are arranged on both sides of the rectangular opening, a support panel is slidably arranged on the guide rails, and the differential to be tested is fixed on the support panel.

5. The automatic mechanical locking differential function test bench according to claim 4, Features: The support panel has a hole in the middle and is connected to an oil cylinder, the oil cylinder is used to accommodate the differential to be tested, and the flange of the differential to be tested is connected to the support panel by bolts.

6. The automatic mechanical locking differential function test bench according to claim 5, Features: An oil control pool is arranged on the upper surface of the operating table, and the bottom of the oil control pool is communicated with the upper section of the oil cylinder.

7. The automatic mechanical locking differential function test bench according to claim 1, Features: The support frame comprises a support column and a rectangular frame. Two support columns are arranged on one side of the operating table. The tops of the support columns are connected to the rectangular frame. The rectangular frame is provided with an upper surface and a lower surface.

8. The automatic mechanical locking differential function test bench according to claim 7, Features: The upper surface is provided with a vertical reduction motor, and the lower surface is provided with a bearing, wherein the bearing is coaxial with an output shaft of the reduction motor.

9. The automatic mechanical locking differential function test bench according to claim 8, Features: The transmission shaft is a stepped shaft, the large end of the transmission shaft is connected to the torque limiter, and the small end passes through the bearing and is connected to an output end of the differential to be tested through a spline connection sleeve.

10. The automatic mechanical locking differential function test bench according to claim 1, Features: The electric control cabinet is provided with a touch screen, a speed display, an indicator light, a forward button, a reverse button, a stop / reset button, an emergency stop switch, a manual switch and an automatic switch.

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