A differential break-in test apparatus and method of using same

Abstract

The application relates to the field of differential detector devices, in particular to a differential grinding test device and a use method thereof, which comprises a bottom plate, the bottom plate is provided with a driving device and a simulation device; the driving device comprises a placing box, a placing mechanism and a driving mechanism; the placing box is filled with oil; the driving mechanism comprises a driving motor, the driving motor is connected with a longitudinal adjusting mechanism for controlling the longitudinal position of the driving motor; the simulation device comprises a brake; the brake is connected with a differential to be detected; the differential grinding and durability test detection operation can be realized through the cooperation of the driving device and the simulation device; the oil is filled in the placing box, so that the differential can be tested in the oil, which is more in line with the actual working condition; and through the setting of the longitudinal adjusting mechanism, the output shaft line height of the driving motor can be adjusted, and the universality is high.

Description

Technical Field

[0001] This invention relates to the field of differential testing equipment, specifically a differential break-in test device and its usage method. 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.

[0003] When conducting durability tests on automotive differentials, the entire vehicle is typically inspected or individual components are tested.

[0004] During vehicle testing, the main method involves mounting the entire vehicle on a component assembly and conducting a figure-eight test at a specific site. This figure-eight test is time-consuming, requires renting facilities and vehicles, and consumes a significant amount of energy, manpower (at least one test technician and two drivers), and wheel assemblies. This makes the durability testing of automotive axle differentials costly, time-consuming, and labor-intensive.

[0005] While this type of testing can perform durability checks on differentials, it is easily affected by many factors such as weather, location, and personnel.

[0006] When testing a single component (differential), a drive motor is typically used to continuously run the differential under test, thereby enabling the differential durability test.

[0007] For example, application number CN202210326646.3 discloses a test bench for the impact torsional fatigue strength of a differential assembly. However, the above patent can only perform a single fatigue strength test, and the application range of the test bench is small.

[0008] Meanwhile, in the prior art, patent 2014208146933 discloses a simple durability test assembly for automobile differentials.

[0009] The test bench uses a differential mounting bracket to fix the differential under test. The differential under test consists of a cast iron shell and an internal planetary gear system. It is heavy and each time it is fixed and installed with the differential mounting bracket, it is time-consuming and labor-intensive to hoist or lift it.

[0010] Meanwhile, for different models of differentials, the axis height of the input shaft of the differential under test is different from that of the drive shaft of the drive motor, which requires high installation accuracy and is inconvenient to install.

[0011] Furthermore, traditional differential testing involves no lubrication operation, resulting in low test reference value.

[0012] Therefore, in order to improve or solve at least one of the above problems, a new type of testing equipment is needed. Summary of the Invention

[0013] The purpose of this invention is to provide a testing device that allows for the testing of differentials under lubricated conditions.

[0014] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0015] A differential break-in test device includes a base plate, on which a drive device and a simulation device are mounted;

[0016] The placement drive device includes a placement box, a placement mechanism, and a drive mechanism;

[0017] The placement box was filled with oil.

[0018] The placement mechanism is installed inside the placement box;

[0019] The driving mechanism includes a drive motor, and the drive motor is connected to a longitudinal adjustment mechanism for controlling the longitudinal position of the drive motor.

[0020] The simulation device includes a brake; the brake is connected to the differential under test.

[0021] The longitudinal adjustment mechanism includes a support frame, on which an electric push rod is provided; the drive mechanism further includes a limiting mechanism, which includes a restraint housing disposed on the drive motor.

[0022] The restraint housing includes a motor box, which includes a rear cover plate and a front cover plate. The rear cover plate is connected to the front cover plate via a side frame plate.

[0023] The side frame plates are distributed on the side of the drive motor, and the rear cover plate and the front cover plate are distributed at both ends of the drive motor;

[0024] The restraint housing is equipped with a lifting plate, and the electric push rod is connected to the restraint housing through the lifting plate.

[0025] The restraint shell is slidably connected to the upper end of the support frame via a third slider.

[0026] The placement mechanism includes a positioning plate with a hollowed-out groove; the positioning plate is connected to a U-shaped frame.

[0027] The U-shaped frame is slidably connected to the second slide rail inside the placement box via a second slider.

[0028] The differential break-in test equipment also includes a pushing mechanism, which includes a support frame and a pushing cylinder on the support frame; the pushing cylinder is arranged parallel to the second slide rail.

[0029] The differential break-in test equipment also includes a plug-in fixing mechanism, through which the drive mechanism is connected to the differential under test; the plug-in fixing mechanism includes a plug-in part; the plug-in part includes a guide positioning pin disposed on the front cover plate of the restraint housing; the guide positioning pin is used in conjunction with the guide positioning hole on the differential under test.

[0030] The plug-in fixing mechanism further includes a fixing part, which includes a first fixing hole provided on the front cover plate of the restraint housing; the first fixing hole is disposed opposite to a second fixing hole on the differential under test; the drive mechanism is connected to the differential under test by bolts passing through the first fixing hole and the second fixing hole.

[0031] The simulation device includes two brakes; the two brakes are distributed on both sides of the differential under test;

[0032] One of the brakes is connected to the base plate via a fixed support component;

[0033] Another brake is connected to the base plate via a movable support component;

[0034] The fixed support component includes a fixed longitudinal bracket mounted on the base plate; the fixed longitudinal bracket is connected to the corresponding brake.

[0035] The movable support component includes a movable longitudinal bracket mounted on the base plate;

[0036] The movable longitudinal support is connected to the base plate via a first sliding mechanism;

[0037] The first sliding mechanism includes a first slide rail disposed on the base plate and a first slider disposed on the movable longitudinal support, wherein the movable longitudinal support is connected to the first slide rail via the first slider.

[0038] A method for using a differential break-in test device, the method comprising the following steps:

[0039] Step 1: Mount the differential to be tested onto the positioning plate; then tighten the wheel axle to the differential to be tested;

[0040] Step 2: Adjust the position of the drive motor according to the model of the differential to be tested, so that the motor output shaft is collinear with the differential input shaft.

[0041] Step 3: Control the position of the differential under test so that the drive motor engages with the differential under test;

[0042] Step 4: Start the drive motor to drive the differential under test and perform the corresponding test operation.

[0043] The advantages of this invention are:

[0044] This invention discloses a differential break-in test device and its usage method.

[0045] This invention, through the combined use of a drive unit and a simulation device, enables differential break-in and durability testing.

[0046] In addition, by injecting oil into the placement box, the present invention allows the differential to be tested in the oil, which is more in line with actual working conditions and has better practical reference value.

[0047] In addition, the present invention, through the setting of the longitudinal adjustment mechanism, makes the height of the output shaft of the drive motor adjustable, which has high versatility.

[0048] Furthermore, by setting up movable support components, the wheel track can be adjusted for different models of differentials under test, enabling one testing device to test multiple models of chassis differentials.

[0049] Meanwhile, the present invention, through the setting of the plug-in fixing mechanism, allows for different fixing methods, enabling long-term testing by bolt tightening or short-term testing by simply pushing the cylinder to tighten; this facilitates selection according to needs during actual testing and better meets actual design requirements. Attached Figure Description

[0050] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0051] Figure 1 The present invention relates to an automotive differential break-in test bench assembly that facilitates disassembly and assembly testing. Figure 1 ;

[0052] Figure 2 The present invention relates to an automotive differential break-in test bench assembly that facilitates disassembly and assembly testing. Figure 2 ;

[0053] Figure 3 This is a schematic diagram of the transmission system mechanism;

[0054] The markings in the above figures are all:

[0055] 1. Base plate; 2. Placement box; 3. Fixed longitudinal support; 4. Movable longitudinal support; 5. Longitudinal adjustment mechanism; 6. Support frame; 7. Push cylinder;

[0056] 10. First guide rail; 11. First slider; 12. Limit block;

[0057] 20. Second guide rail; 21. Second slider; 22. U-shaped frame; 23. Positioning plate;

[0058] 30. First magnetic powder brake;

[0059] 40. Second magnetic powder brake;

[0060] 50. Support rod; 51. Top plate; 52. Electric push rod; 52-1. Push rod motor; 52-2. Push rod; 52-3. Gearbox; 53. Lifting plate; 54. Motor box; 54-1. Side frame plate; 54-10. Third slider; 54-2. Rear cover plate; 54-3. Front cover plate; 55. Drive motor; 55-1. Guide positioning pin; 55-2. Guide positioning hole. Detailed Implementation

[0061] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0062] A differential break-in test device includes a base plate 1, on which a placement drive device and a simulation device are mounted. The placement drive device includes a placement box 2, a placement mechanism, and a drive mechanism. The placement box 2 is filled with oil. By using the placement drive device and the simulation device in combination, this invention can realize the break-in and durability testing of the differential under test. In addition, by filling the placement box 2 with oil, this invention allows the differential under test to be tested in oil, which is more in line with actual working conditions and has better practical reference value.

[0063] The differential break-in test equipment disclosed in this invention is mainly used to test the operating status of differentials; the test can be its transmission efficiency, durability, etc.; in other words, the differential break-in test equipment disclosed in this invention can realize different test operations on the differential under test, so that the differential break-in test equipment disclosed in this invention has a wider range of applications.

[0064] Specifically, the differential break-in test equipment disclosed in this invention mainly includes a base plate 1. The base plate 1 provides good bottom support and facilitates the installation of various components. In addition, the base plate 1 in this invention is provided with a placement drive device and a simulation device. The placement drive device is mainly used to place the differential under test, and at the same time, it can provide driving force to the differential under test during subsequent use, which facilitates the normal operation of the differential under test.

[0065] Additionally, it should be noted that the term "differential under test" as used above and below is a general term. This invention can test different models of differentials under test. The term "differential under test" is used here for ease of explanation, but it does not mean that the differential under test here is a single model of differential structure.

[0066] Furthermore, the placement drive device described in this invention includes a placement box 2, a placement mechanism, and a drive mechanism. The placement box 2 facilitates the arrangement and placement of the placement mechanism, as well as the filling of oil, thus facilitating subsequent lubrication of the differential under test. The drive mechanism is primarily used to integrate with the differential under test, enabling the drive mechanism to drive the differential. More importantly, the placement box 2 is filled with oil, which provides excellent lubrication, primarily lubricating the gears within the differential under test. This better simulates the actual operating conditions of the differential under test, ensuring that the actual testing is more akin to the differential under test being installed and operating on the vehicle.

[0067] In addition, the placement mechanism described in this invention is set inside the placement box 2. This arrangement facilitates the placement of the placement mechanism inside the placement box 2. Furthermore, the placement mechanism is mainly used to place and fix the differential under test, so as to facilitate the subsequent adjustment of the position of the differential under test by the push mechanism as needed. This enables the installation and subsequent testing of different models of differentials under test.

[0068] Meanwhile, the drive mechanism described in this invention includes a drive motor 55, which mainly provides driving force to the differential under test to simulate the driving force experienced by the differential under test during actual operation. Furthermore, the drive motor 55 is connected to a longitudinal adjustment mechanism 5 for controlling its longitudinal position. By setting the longitudinal adjustment mechanism 5, the longitudinal position of the drive motor 55 can be adjusted, thereby achieving the longitudinal position of the output shaft of the drive motor 55. This facilitates collinear arrangement with the input shaft of the differential under test, and facilitates subsequent connection between the drive motor 55 and the differential under test. Based on the above design, this invention allows the differential break-in test equipment disclosed in this invention to be applicable to the test drive of various differential models.

[0069] Furthermore, the simulation device described in this invention includes a brake; the brake is connected to the differential under test; in actual use, a brake is connected to each side of the differential under test via a wheel axle. The brake is a magnetic powder brake, which is an existing mechanism. The wheel axle is connected to the wheel via the magnetic powder brake. Based on this setup, the state of the differential under test connected to the wheel can be simulated. That is, by setting up the magnetic powder brake, a traditional braking system can be simulated. In subsequent use, the braking impact on the differential under test can be simulated by braking through the magnetic powder brake.

[0070] Furthermore, the longitudinal adjustment mechanism 5 includes a support frame, on which an electric push rod 52 is provided; the drive mechanism further includes a limiting mechanism, which includes a restraining housing disposed on the drive motor 55; the restraining housing includes a motor box 54, which includes a rear cover plate 54-2 and a front cover plate 54-3, the rear cover plate 54-2 being connected to the front cover plate 54-3 via side frame plates 54-1; the side frame plates 54-1 are distributed on the side of the drive motor 55, and the... The rear cover plate 54-2 and the front cover plate 54-3 are distributed at both ends of the drive motor 55; the restraint housing is provided with a lifting plate 53, and the electric push rod 52 is connected to the restraint housing and the drive motor 55 through the lifting plate 53; in this invention, the support frame plays a supporting role in raising the height, and the support frame is provided with an electric push rod 52, which mainly includes a push rod 52-2, a gearbox 52-3, and a push rod motor 52-1; the push rod motor 52-1 drives the push rod 52-2 through the gearbox 52-3. The longitudinal movement of the push rod 52-2 allows the drive motor 55 connected to it to move up and down, facilitating the adjustment of the longitudinal height of the drive motor 55 as needed. Additionally, a restraint housing is provided on the outside of the drive motor 55. This restraint housing mainly includes a motor housing 54, comprising side frame plates 54-1, a rear cover plate 54-2, and a front cover plate 54-3. Two side frame plates 54-1 are provided, located on either side of the drive motor 55. The rear cover plate 54-2 is securely connected to the side frame plates 54-1 at both ends. The two ends of the cover plate 54-3 are respectively fastened to the side frame plate 54-1; the front cover plate 54-3 is arranged on the side close to the differential to be tested; the motor box 54 not only provides external protection for the drive motor 55, but also limits the lateral position of the drive motor 55 to prevent the drive motor 55 from moving laterally during subsequent use; in addition, in order to facilitate the connection between the electric push rod 52 and the drive motor 55, in this invention, the push rod 52-2 of the electric push rod 52 is required to be connected to the motor box 54 through the lifting plate 53.

[0071] In addition, the longitudinal adjustment mechanism 5 described in this invention includes a support frame, which serves as a longitudinal support for raising the height. Specifically, the support frame is a gantry structure. At the same time, the support frame is equipped with an electric push rod 52. The electric push rod 52 is connected to the drive motor 55. The extension and retraction control of the electric push rod 52 realizes the adjustment of the longitudinal position of the drive motor 55.

[0072] Furthermore, the driving mechanism in this invention also includes a limiting mechanism. The limiting mechanism provides a good restraining effect, facilitating the limitation of the lateral position of the drive motor 55. In addition, the limiting mechanism in this invention includes a restraining shell disposed on the drive motor 55. The restraining shell is arranged on the outer periphery of the drive motor 55, providing a good restraining and fixing effect, facilitating the protection of the drive motor 55. At the same time, in this invention, the restraining shell is slidably connected to the upper end of the support frame through a third slider 54-10. The restraining shell is connected to the support frame through a third sliding mechanism. The third sliding mechanism includes a third slider 54-10 disposed on the restraining shell, which is slidably connected to the support frame. The third sliding mechanism provides a good longitudinal guiding effect, effectively preventing the drive motor 55 from shaking or deflecting when adjusting its longitudinal position. It can also be used to counteract the lateral impact force on the drive motor 55, preventing the drive motor 55 from separating from the differential under test.

[0073] Furthermore, the placement mechanism in this invention includes a positioning plate 23, which has a perforated groove. A U-shaped bracket 22 is connected to the positioning plate 23. The positioning plate 23 facilitates the connection of the differential under test to the placement mechanism. In actual connection, the differential under test is fixed to the positioning plate 23 with bolts, while the perforated groove provides good clearance, allowing the differential under test to be easily inserted into the groove. Simultaneously, a U-shaped bracket 22 is provided at the lower end of the positioning plate 23, providing good support and height adjustment, facilitating stable placement of the differential under test in the placement box 2 and convenient oil lubrication within the placement box. The U-shaped bracket 22 also facilitates oil lubrication of the differential under test within the placement box 2.

[0074] Furthermore, in this invention, the U-shaped frame 22 is slidably connected to the second slide rail 20 inside the placement box 2 via the second slider 21; specifically, the U-shaped frame 22 is connected to the placement box 2 via a second sliding mechanism; the second sliding mechanism includes a second slide rail 20 disposed inside the placement box 2, and the U-shaped frame 22 is slidably connected to the second slide rail 20 via the second slider 21; in this invention, the setting of the second sliding mechanism serves two purposes: one is to facilitate the installation of the U-shaped frame 22 inside the placement slot; the other is to provide a good guiding function, facilitating the lateral movement of the placement mechanism within the placement box 2; thereby facilitating the docking and connection of the differential under test with the drive motor 55; at the same time, this setting also facilitates the docking and connection of different models of differentials under test with the drive motor 55.

[0075] Furthermore, the differential break-in test equipment described in this invention also includes a pushing mechanism. This pushing mechanism facilitates automatic adjustment of the differential's position. Specifically, the pushing mechanism includes a support frame 6, on which a pushing cylinder 7 is mounted. The pushing cylinder 7 is arranged parallel to the second slide rail 20. The support frame 6 provides excellent elevation, facilitating longitudinal support for the pushing cylinder 7. Additionally, the pushing cylinder 7 is arranged laterally, and the extension and retraction of its piston rod pushes the differential under test, causing it to move towards the drive motor 55. This allows the drive motor 55 to engage with the differential under test, facilitating subsequent test drive.

[0076] Furthermore, the differential break-in test equipment described in this invention also includes a plug-in fixing mechanism, through which the drive mechanism is connected to the differential under test; the plug-in fixing mechanism includes a plug-in part; the plug-in part includes a guide positioning pin 55-1 disposed on the front cover plate 54-3 of the restraint housing; the guide positioning pin 55-1 cooperates with the guide positioning hole 55-2 on the differential under test; the differential under test is provided with the guide positioning hole 55-2; the invention, through the setting of the plug-in part, plays a good limiting and guiding role, ensuring the accuracy of the connection between the differential under test and the drive motor 55.

[0077] Meanwhile, during the design process, multiple connectors can be provided between the drive mechanism and the differential under test as needed, which can greatly ensure the multi-position guiding and positioning between the drive mechanism and the differential under test.

[0078] Of course, in order to avoid interference and facilitate processing, in actual design, only one plug-in part is usually set, and the other positions are set with the fixing parts mentioned below; of course, the specific number of parts can be selected according to actual requirements.

[0079] Furthermore, the insertion and fixing mechanism in this invention also includes a fixing part, which includes a first fixing hole provided on the front cover plate 54-3 of the restraint housing; the first fixing hole is disposed opposite to a second fixing hole on the differential under test; the drive mechanism is connected to the differential under test by bolts passing through the first fixing hole and the second fixing hole; the present invention, through the setting of the fixing part, plays a good restraint and fixing role, mainly to ensure the fixed connection between the drive mechanism and the differential under test; and to ensure the stability of the connection between the differential under test and the drive mechanism during long-term testing.

[0080] Based on the above design, in actual use, when the testing time is short, the differential under test can be connected to the drive mechanism by pushing the push mechanism, without the need to use a fixing part to achieve the connection between the drive mechanism and the differential under test.

[0081] When the testing time is long, after the pushing mechanism pushes the differential under test to the set position, the fixed part is used to achieve a fixed connection between the driving mechanism and the differential under test.

[0082] In addition, in actual implementation, the first fixing hole and the guide positioning pin 55-1 are mainly set on the binding shell; please refer to the attached drawings for details.

[0083] Furthermore, the simulation device in this invention includes two brakes; the two brakes are distributed on both sides of the differential under test; one brake is connected to the base plate 1 via a fixed support component; the other brake is connected to the base plate 1 via a movable support component; the fixed support component includes a fixed longitudinal bracket 3 disposed on the base plate 1; the fixed longitudinal bracket 3 is connected to the corresponding brake; the movable support component includes a movable longitudinal bracket 4 disposed on the base plate 1; the movable longitudinal bracket 4 is connected to the base plate 1 via a first sliding mechanism; the first sliding mechanism includes a first slide rail 10 disposed on the base plate 1 and a first slider 11 disposed on the movable longitudinal bracket 4, the movable longitudinal bracket 4 being connected to the first slide rail 10 via the first slider 11; through the above design, it can be seen that; in actual use, the position of the brake connected to the base plate 1 via the movable support component can be changed as needed, thereby changing the relative distance between the two brakes. This setting not only facilitates the installation of the differential under test on the test equipment of this invention, but also enables the installation test operation of differentials under test with different wheel tracks.

[0084] In addition, during actual installation, the brake on the side closer to the drive motor 55 is connected to the base plate 1 via a fixed support component, while the brake on the side farther from the drive motor 55 is connected to the base plate 1 via a movable support component. The reason for this design is that, since the drive motor 55 is laterally limited, after the differential under test is combined with the drive motor 55, the relative position between the brake on the side closer to the drive motor 55 and the differential under test remains essentially unchanged. Therefore, the brake on this side can be connected to the base plate 1 using a fixed support component. Subsequently, by adjusting the movable support component on the other side, the normal installation of differentials under test with different wheelbases can be achieved.

[0085] Furthermore, in this invention, for better performance, both brakes can be connected to the base plate 1 via movable support components. This arrangement allows for adjustment from both sides of the test device, enabling faster adjustment of the relative positions of the two brakes.

[0086] A method for using a differential break-in test device, the method comprising the following steps:

[0087] Step 1: Install the differential to be tested on the positioning plate 23; then tighten the wheel axle to the differential to be tested;

[0088] Step 2: Adjust the drive motor position 55 according to the model of the differential under test, so that the motor output shaft is collinear with the input shaft of the differential under test;

[0089] Step 3: Control the position of the differential under test so that the drive motor 55 engages with the differential under test;

[0090] Step 4: Start the drive motor 55 to drive the differential under test to run and complete the corresponding test operation.

[0091] The present invention, through the above-described method of use, facilitates the testing operation of the differential break-in test equipment disclosed in this invention on the corresponding differential to be tested.

[0092] specific:

[0093] This invention discloses a differential break-in test device, which mainly includes a base plate 1, on which a placement drive device and a simulation device are provided; the placement drive device includes a placement box 2, a placement mechanism and a drive mechanism; the placement box 2 is filled with oil.

[0094] Specifically, it includes the following:

[0095] A base plate 1 is provided, on which a placement box 2 is provided. A positioning plate 23 is provided inside the placement box 2. A U-shaped frame 22 is connected to the lower end of the positioning plate 23. The U-shaped frame 22 is connected to the placement box 2 via a second sliding mechanism. Additionally, a driving mechanism is provided above the placement box 2. The driving mechanism mainly includes a drive motor 55, which is connected to a longitudinal adjustment mechanism 5. The longitudinal adjustment mechanism 5 includes a support frame, on which an electric push rod 52 is provided. The electric push rod 52 is connected to the drive motor 55. Note that the electric push rod 52 and the drive motor 55 are not directly connected; the term "connected" does not imply a direct connection. The longitudinal adjustment mechanism 5 includes a support frame, on which the electric push rod 52 is provided. The driving mechanism also includes a limiting mechanism, which includes a restraining housing mounted on the drive motor 55. The restraint housing includes a motor box 54, which includes a rear cover plate 54-2 and a front cover plate 54-3. The rear cover plate 54-2 is connected to the front cover plate 54-3 via a side frame plate 54-1. The side frame plate 54-1 is distributed on the side of the drive motor 55, and the rear cover plate 54-2 and the front cover plate 54-3 are distributed at both ends of the drive motor 55. The restraint housing is provided with a lifting plate 53, which is connected to the restraint housing. The electric push rod 52 is connected to the restraint housing and the drive motor 55 via the lifting plate 53. The drive mechanism also includes a limiting mechanism, which includes the restraint housing disposed on the drive motor 55. The restraint housing is connected to the support frame via a third sliding mechanism. The third sliding mechanism includes a third slider 54-10 disposed on the restraint housing, which is slidably connected to the support frame.

[0096] In actual design, the support frame of this invention is a gantry frame, mainly including a top plate 51, with both ends of the top plate 51 connected to the bottom plate 1 via support rods 50; the electric push rod 52 disclosed in this invention is set on the top plate 51 of the support frame; in this invention, the electric push rod 52 mainly includes a push rod motor 52-1 and a push rod 52-2; driven by the push rod motor 52-1, the push rod 52-2 adjusts the longitudinal position of the drive motor 55; at the same time, in actual arrangement, the side frame plate 54-1 is connected to the support rod 50 via a third slider 54-10.

[0097] In this invention, the restraint housing mainly includes a motor box 54; the motor box 54 is mainly used for arranging and placing the drive motor 55. In addition, in this invention, the motor box 54 includes a rear cover plate 54-2 and a front cover plate 54-3; the rear cover plate 54-2 and the front cover plate 54-3 are connected by a side frame plate 54-1. In the actual connection arrangement, the side frame plate 54-1 is connected to the support rod 50 through a third slider 54-10; in the actual arrangement, the electric push rod 52 is connected to the lifting plate 53, and the lifting plate 53 is then connected to the side frame plate 54-1.

[0098] In addition, in actual arrangement, in order to limit the position of the third slider 54-10, a limiting block 12 is provided on the base plate 1; it can also be considered as limiting the position of the movable longitudinal support 4; the main purpose is to prevent the magnetic powder brake from colliding with the placement box 2.

[0099] Meanwhile, due to their different positions, the brakes are divided into a first magnetic powder brake 30 and a second magnetic powder brake 40; for example, as shown in the attached figure, the left side is the first magnetic powder brake 30; and the right side is the second magnetic powder brake 40.

[0100] The working principle of this invention is as follows:

[0101] Step 1: Adjust the differential to be tested onto the positioning plate 23, and then fasten it to the positioning plate 23 with bolts. Then, pass the two wheel axles through the first magnetic powder brake 30 and the second magnetic powder brake 40 respectively and fasten them to the differential to be tested.

[0102] Step 2: According to the model of the differential under test, the push rod 52-2 in the electric push rod 52 is extended by the microcontroller, which drives the lifting plate 53 to move the motor box 54 and the drive motor 55 fixed in the middle; until the axis of the output shaft of the drive motor 55 is collinear with the axis of the input shaft of the differential under test.

[0103] Step 3: Extend the piston rod of cylinder 7, pushing the differential under test, positioning plate 23 and U-shaped frame 22 along the second slide rail 20 toward the drive motor 55. With the guide positioning pin 55-1 and guide positioning hole 55-2 in relative positioning, the output shaft of drive motor 55 engages with the input shaft of differential under test.

[0104] Among them, the placement box 2 contains lubricating oil, which serves to lubricate the differential under test and realize the test of the differential under oil lubrication.

[0105] The motor box 54 includes a side frame plate 54-1, a rear cover plate 54-2, and a front cover plate 54-3, which realizes a reliable fixing method for the drive motor 55, avoids braking by the first magnetic powder brake 30 and the second magnetic powder brake 400, and ensures that the drive motor 55 will not move when a speed difference occurs between the two sides.

[0106] The beneficial effects of the above design of the present invention are:

[0107] This invention, through the combined use of a drive unit and a simulation device, enables differential break-in and durability testing.

[0108] In addition, by injecting oil into the placement box 2, the present invention allows the differential to be tested in the oil, which is more in line with actual working conditions and has better practical reference value.

[0109] In addition, the present invention, through the setting of the longitudinal adjustment mechanism 5, makes the height of the output axis of the drive motor 55 adjustable, which has high versatility.

[0110] Furthermore, by setting up movable support components, the wheel track can be adjusted for different models of differentials under test, enabling one testing device to test multiple models of chassis differentials.

[0111] Meanwhile, the present invention, through the setting of the plug-in fixing mechanism, allows for different fixing methods, enabling long-term testing by bolt tightening or short-term testing by simply pushing the cylinder 7 to tighten; this facilitates selection according to needs during actual testing and better meets actual design requirements.

[0112] Obviously, the specific implementation of this invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A differential break-in test device, characterized in that, Includes a base plate, on which a driving device and a simulation device are mounted; The placement drive device includes a placement box, a placement mechanism, and a drive mechanism; The placement box is filled with oil. The placement mechanism is installed inside the placement box; The driving mechanism includes a drive motor, and the drive motor is connected to a longitudinal adjustment mechanism for controlling the longitudinal position of the drive motor. The simulation device includes a brake; the brake is connected to the differential under test; The longitudinal adjustment mechanism includes a support frame, on which an electric push rod is provided; the drive mechanism further includes a limiting mechanism, which includes a restraint housing disposed on the drive motor. The restraint housing includes a motor box, which includes a rear cover plate and a front cover plate. The rear cover plate is connected to the front cover plate via a side frame plate. The side frame plates are distributed on the side of the drive motor, and the rear cover plate and the front cover plate are distributed at both ends of the drive motor; The restraint housing is provided with a lifting plate, and the electric push rod is connected to the restraint housing through the lifting plate; The differential break-in test equipment also includes a plug-in fixing mechanism, through which the drive mechanism is connected to the differential under test; the plug-in fixing mechanism includes a plug-in part; the plug-in part includes a guide positioning pin disposed on the front cover plate of the restraint housing; the guide positioning pin is used in conjunction with the guide positioning hole on the differential under test; The plug-in fixing mechanism further includes a fixing part, which includes a first fixing hole provided on the front cover plate of the restraint housing; the first fixing hole is disposed opposite to a second fixing hole on the differential under test; the drive mechanism is connected to the differential under test by bolts passing through the first fixing hole and the second fixing hole. The simulation device includes two brakes; the two brakes are distributed on both sides of the differential under test; One of the brakes is connected to the base plate via a fixed support component; Another brake is connected to the base plate via a movable support component; The fixed support component includes a fixed longitudinal bracket mounted on the base plate; the fixed longitudinal bracket is connected to the corresponding brake. The movable support component includes a movable longitudinal bracket mounted on the base plate; The movable longitudinal support is connected to the base plate via a first sliding mechanism; The first sliding mechanism includes a first slide rail disposed on the base plate and a first slider disposed on the movable longitudinal support, wherein the movable longitudinal support is connected to the first slide rail via the first slider.

2. The differential break-in test equipment according to claim 1, characterized in that, The restraint shell is slidably connected to the upper end of the support frame via a third slider.

3. The differential break-in test equipment according to claim 1, characterized in that, The placement mechanism includes a positioning plate with a hollowed-out groove; the positioning plate is connected to a U-shaped frame.

4. The differential break-in test equipment according to claim 3, characterized in that, The U-shaped frame is slidably connected to the second slide rail inside the placement box via a second slider.

5. The differential break-in test equipment according to claim 4, characterized in that, The differential break-in test equipment also includes a pushing mechanism, which includes a support frame and a pushing cylinder on the support frame; the pushing cylinder is arranged parallel to the second slide rail.

6. The method of using the differential break-in test equipment as described in any one of claims 1-5, characterized in that, The method of use includes the following steps: Step 1: Mount the differential to be tested onto the positioning plate; then tighten the wheel axle to the differential to be tested; Step 2: Adjust the position of the drive motor according to the model of the differential to be tested, so that the motor output shaft is collinear with the differential input shaft. Step 3: Control the position of the differential under test so that the drive motor engages with the differential under test; Step 4: Start the drive motor to drive the differential under test and perform the corresponding test operation.

Images