Low-temperature water immersion testing machine for automobile hub bearing

Abstract

The utility model discloses an automobile hub bearing low-temperature water immersion testing machine which comprises a tool box and a water immersion box, an inner cavity of the water immersion box is a water immersion cavity, a water injection structure is arranged on the tool box, a test block is arranged in the water immersion cavity, and one end of the test block is provided with a mounting hole for mounting an external bearing to be tested. The tool box is provided with a transmission shaft and a driving part used for driving the transmission shaft to operate, and the starting end of the transmission shaft is a connecting end used for penetrating into the water immersion cavity and being connected and matched with an external to-be-tested bearing inner ring. The tool box is provided with a first loading piece used for applying an axial load to the test block, a second loading piece used for applying a radial load to the test block, and a linkage structure used for being in linkage cooperation with the first loading piece and the second loading piece to combine and load the axial load and the radial load to the test block. According to the utility model, the problem that a tool for simulating the immersion working condition of the automobile hub bearing and carrying out a loading test on the hub bearing under the immersion working condition is lacked in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile wheel hub bearing test tooling, concretely to a low temperature water immersion testing machine for automobile wheel hub bearing. BACKGROUND

[0002] As the core component of the automobile chassis system, the performance of the automobile wheel hub bearing directly affects the driving safety and experience. In actual working conditions, the wheel hub bearing often faces complex environmental challenges, especially in low-temperature water immersion scenarios, such as winter rain and snow weather or driving on water immersion road surface. The bearing needs to withstand water medium erosion in low-temperature environment and simultaneously withstand the axial load (such as steering force), the radial load (such as vehicle body weight) and the combined load formed by the coupling of the two during vehicle driving. Such working conditions are prone to cause problems such as lubrication failure, corrosion and wear, and fatigue fracture of the bearing. Therefore, it is crucial to test the reliability of the wheel hub bearing under low-temperature water immersion working conditions.

[0003] The existing technology mainly has the following deficiencies in the test equipment for the wheel hub bearing: on the one hand, the traditional bearing test device focuses on the simulation of single environment or single load condition. For example, some low-temperature test equipment can only provide a low-temperature environment to test the low-temperature resistance of the bearing material, but lacks water immersion working condition simulation. The water immersion test device can only realize static soaking and cannot apply dynamic load simultaneously, making it difficult to restore the stress state of the bearing in the actual driving process. On the other hand, the equipment related to load testing usually adopts axial or radial load loading mode, ignoring the coupling effect of the two loads in actual working conditions. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides a low-temperature water immersion testing machine for automobile wheel hub bearing to solve the problem that there is a lack of simulation of water immersion working conditions of automobile wheel hub bearing and loading test of wheel hub bearing under water immersion working conditions in the prior art.

[0005] To achieve the above purpose, the utility model provides a low-temperature water immersion testing machine for automobile wheel hub bearing, which comprises a tooling box and a water immersion tank arranged on the tooling box. The inner cavity of the water immersion tank is a water immersion cavity. A water injection structure is arranged on the tooling box for pouring water flow into the water immersion cavity. A test block is arranged in the water immersion cavity. An installation hole is formed at one end of the test block for installing an external bearing to be tested. A transmission shaft and a driving member for driving the transmission shaft to rotate are arranged on the tooling box. The initial end of the transmission shaft is a connecting end for penetrating into the water immersion cavity and connecting with the inner ring of the external bearing to be tested. A first loading member for applying axial load to the test block, a second loading member for applying radial load to the test block and a linkage structure for linkage cooperation with the first loading member and the second loading member to combine and load the axial load and the radial load on the test block are arranged on the tooling box.

[0006] The technical scheme has the beneficial effects that: the tooling box serves as an overall support structure, providing a stable installation base for the water immersion box, the loading piece and the driving system, and ensuring that each component can maintain position accuracy in complex environments such as high load and low temperature immersion; the water immersion cavity of the water immersion box continuously infuses water flow through the water injection structure, which can simulate the water immersion working condition of the hub bearing in rainy and water crossing scenes, avoid test condition deviation caused by water evaporation or loss, and ensure the consistency of the bearing installation position by designing the installation hole of the test block as a standardized fixed interface for the bearing to be tested, thereby reducing test data fluctuations caused by installation errors; the transmission shaft is matched with the driving piece, the driving piece drives the transmission shaft to rotate, and then drives the inner ring of the bearing to be tested to rotate, thereby simulating the rotation working condition of the hub bearing in vehicle driving; the first loading piece (axial load) and the second loading piece (radial load) are arranged to simulate the axial force (such as the front-back direction impact on the hub) when the vehicle accelerates / brakes and the radial force (such as the left-right direction tilting force on the hub) when the vehicle turns, and the axial load and the radial load are combined and loaded to the test block through the linkage structure, which can truly restore the complex working condition of the hub bearing under multi-directional load in actual operation (such as the bearing under axial thrust and radial tilting force when the vehicle turns), thereby avoiding the defects of the traditional tester that can only load in one direction and cannot reflect the real force state. The above-mentioned low-temperature water immersion tester for automobile hub bearings, through the collaborative design of the tooling box, the water immersion box, the water injection structure, the test block, the transmission shaft, the driving piece, the first loading piece, the second loading piece and the linkage structure, fully covers the complex working condition simulation requirements that the hub bearing may face in actual operation, and effectively improves the authenticity and reliability of the test results.

[0007] The utility model further sets up: the first loading piece includes the radial loading cylinder that sets up in the tooling box, the second loading piece includes the axial loading cylinder that sets up in the tooling box, the radial loading cylinder output end penetrates the water immersion cavity and is opposite perpendicular with transmission shaft arrangement, the axial loading cylinder output end penetrates the water immersion cavity and is opposite parallel with transmission shaft arrangement, the axial loading cylinder output end and radial loading cylinder output end all are provided with load sensor.

[0008] The technical scheme has the beneficial effects that: the output end of the radial loading cylinder is arranged perpendicularly to the transmission shaft, so that the load consistent with the radial direction of the bearing (i.e. the left-right direction of the vehicle when driving) can be directly applied to the test block to simulate the lateral force received by the hub in the steering, bumping and other scenarios; the output end of the axial loading cylinder is arranged in parallel to the transmission shaft, so that the load consistent with the axial direction of the bearing (i.e. the front-rear direction of the vehicle when driving) can be applied to simulate the thrust or pull force received by the hub when accelerating or braking; through the orthogonal arrangement of the perpendicular and parallel directions, the independent application and accurate control of the radial and axial loads are ensured, and the test error caused by the deviation of the load direction is avoided; through arranging the load sensors on the output ends of the radial loading cylinder and the axial loading cylinder, the actual applied load values can be monitored and fed back in real time; through limiting the first loading member to be the radial loading cylinder and the second loading member to be the axial loading cylinder, and through the explicit perpendicular / parallel arrangement of the output ends of the radial loading cylinder and the axial loading cylinder and the arrangement of the load sensors, the problem of inaccurate load application and the inability to independently control the multidirectional load of the traditional testing machine is effectively solved, and the controllability and data accuracy of the test process are greatly improved.

[0009] The utility model further sets up: the linkage structure includes the linkage piece of setting in the water soaking cavity, the linkage piece top is bent and has the stress part, the output end of axial loading cylinder is connected with movable block, the movable block is set up with the movable slot that supplies stress part to put, the stress part is set up with the swing groove, the swing groove is connected with movable slot setting and is set up with swing head in the swing groove, swing head is coaxial connection setting with the output end of radial loading cylinder, the movable block is movably provided with the bolt, the bolt is set up in sequence and is provided with movable block, stress part and swing head, the both sides wall of test block can detachably connect with linkage board, two linkage boards all are detachably connected with linkage piece setting, the linkage board is opposite vertical setting with transmission shaft.

[0010] The core of the linkage structure in the above technology is the cooperation of the swing head and the swing groove: when the output end of the radial loading cylinder pushes the swing head, the swing head can swing freely in the swing groove, thereby adapting to the slight change in the direction of the radial load (such as the deviation of the load direction caused by the vibration of the bearing during operation), and avoiding the force transmission loss or structural jam caused by the direction deviation in the traditional rigid connection mode; the movable groove on the movable block provides space for the axial movement of the force receiving part, and when the output end of the axial loading cylinder pushes the movable block, the force receiving part can slide along the movable groove, thereby transmitting the axial load to the linkage block. The setting of the pin fixes the movable block, the force receiving part and the swing head as a whole, ensures that the radial and axial loads can be transmitted to the linkage block synchronously, realizes the "combined loading" of the multidirectional load, that is, the linkage block is simultaneously subjected to the combined action of the radial and axial forces, and finally the combined force is transmitted to the test block and the bearing to be tested, thereby truly simulating the stress state of the bearing under complex working conditions; the detachable connection design of the linkage plate has multiple advantages: on the one hand, when different specifications of test blocks need to be replaced (such as testing different sizes of hub bearings), the test block can be quickly replaced by detaching the linkage plate, thereby avoiding the complicated maintenance problem caused by the fixed connection between the linkage structure and the test block in the traditional testing machine; on the other hand, the detachable connection between the linkage plate and the linkage block allows the position of the linkage block to be adjusted (such as by selecting different connection hole positions) according to the test requirements, thereby adapting to the installation position and load action point of different bearings, and further improving the working condition adaptability of the testing machine; at the same time, the design of the bending force receiving part of the linkage block is optimized through the geometric structure, thereby realizing the shortest load transmission path and the rationalization of the force arm, reducing the energy loss (such as force attenuation caused by structural deformation or friction) in the load transmission process, and ensuring the efficiency and accuracy of the load application.

[0011] The utility model further provides: The linkage plate is uniformly distributed with a plurality of adjusting grooves along its opening direction, The length direction of the adjusting groove is arranged in the same way as the opening direction of the linkage plate, The linkage block and the adjacent adjusting groove are detachably connected with a plurality of compression bolts.

[0012] The adjusting groove uniformly distributed on the linkage plate extends along its length direction, and the compression bolt can freely slide and lock in the adjusting groove, thereby changing the connection position of the linkage block and the test block. By adjusting the distance between the linkage block and the test block, the "offset distance" (the distance from the hub mounting surface to the center plane of the wheel) and the "wheel radius" (the rolling radius of the tire) of the bearing can be adjusted simultaneously, thereby truly reproducing the actual stress environment of the hub bearing under different vehicle models and different rim specifications, and further improving the test precision and test range.

[0013] The utility model further sets up: install the baffle for preventing the water liquid splashing in the water soaking cavity when the bearing to be tested is running on the water soaking cavity inner wall, the baffle is located transmission shaft connecting end upper position setting, the baffle both sides wall has extension portion and extends to the water soaking cavity bottom wall direction, the extension portion is opposite to the baffle and sets up with the inclination.

[0014] The beneficial effects of the above technical solution are: by setting the baffle and extension portion on the water soaking cavity inner wall, the unstable test environment problem caused by water liquid splashing when the hub bearing is running is effectively solved, the sealing property and data accuracy of the test process are ensured, the baffle is located above the transmission shaft connecting end, its main role is to block the water liquid splashing caused by centrifugal force when the bearing is running, when the bearing to be tested rotates at high speed with the transmission shaft, the water liquid in the water soaking cavity will splash due to the agitation of the bearing inner ring and rolling element, if the splashing water liquid enters the connecting position of the bearing and the transmission shaft (such as the fitting gap between the bearing inner ring and the transmission shaft), it may cause the lubricating grease to be dispersed, the bearing to be corroded, or the splashing to the precision components such as the load sensor and the driving part, causing the sensor to fail or the electrical element to short circuit, the setting of the baffle can form a "barrier" above the bearing, intercepting most of the splashing water liquid and guiding it to the water soaking cavity bottom wall to avoid contacting the key components.

[0015] The utility model further sets up: the driving part includes the driving motor that sets up in the tooling box, and the driving motor output end is connected with the transmission shaft end with transmission belt.

[0016] The beneficial effects of the above technical solution are: in the above technology, the driving motor is connected with the transmission shaft end through the transmission belt, the elastic property of the belt can effectively buffer the vibration and impact when the motor is running, and at the same time, the transmission shaft is driven to run by the driving motor, so that the transmission shaft drives the bearing to be tested to run, thereby simulating the actual running condition of the bearing.

[0017] The utility model further sets up: the tooling box is further provided with high and low temperature box assembly for increasing or reducing the temperature inside the water soaking cavity to simulate the temperature condition when the hub bearing is actually running.

[0018] The high-low temperature box assembly can control the temperature inside the water immersion cavity accurately through a heating and refrigeration system (such as an electric heating pipe and a compressor refrigeration unit), covering a wide temperature range from -40 DEG C (extreme cold region winter working condition) to 120 DEG C (high temperature working condition of bearing heat generation due to friction during high-speed driving), which can restore the temperature environment of the hub bearing under different regions and different driving conditions, for example, the sealing performance of the bearing when starting in the northeast winter low temperature (the viscosity of the lubricating grease increases at low temperature, which may cause the sealing member to harden and leak), or the temperature resistance performance of the bearing when driving at high speed in the south summer (the sealing member is easy to age at high temperature, and the lubricating grease is easy to lose), through the setting of the high-low temperature box assembly, the test machine has the environmental simulation capability of a wide temperature range, can truly reflect the performance of the hub bearing under different temperature conditions, provides a more comprehensive test basis for the temperature resistance, sealing performance and material adaptability evaluation of the bearing, and significantly improves the engineering application value of the test result; the high-low temperature box is a prior art, and therefore the structure and function thereof will not be described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional view of the utility model;

[0020] Figure 2 It is a three-dimensional view of the utility model;

[0021] Figure 3 It is a three-dimensional view of the utility model;

[0022] Figure 4 It is a three-dimensional view of the utility model; Figure 3 It is a three-dimensional view of the utility model; DETAILED DESCRIPTION

[0023] The utility model provides a kind of automobile wheel hub bearing low temperature water immersion testing machine, including tool box 1 and be set on tool box 1 water immersion tank 11, the water immersion tank 11 inner cavity is water immersion cavity 111, the water injection structure for being used to pour water flow in water immersion cavity 111 is provided on tool box 1, test block 2 is provided in water immersion cavity 111, the test block 2 one end is provided with the mounting hole 21 for outside bearing to be tested installation, transmission shaft 12 and the driving member for driving transmission shaft 12 operation are provided on tool box 1, the transmission shaft 12 initial end is the connecting end 121 for being used to be inserted into water immersion cavity 111 and with outside bearing inner ring connection cooperation, first loading piece for being used to apply axial load to test block 2, second loading piece for being used to apply radial load to test block 2 and linkage structure for being used to cooperate with first loading piece and second loading piece to combine axial load and radial load and load on test block 2 are provided on tool box 1, the first loading piece includes radial loading cylinder 3 being arranged in tool box 1, the second loading piece includes axial loading cylinder 31 being arranged in tool box 1, the radial loading cylinder 3 output end is inserted into water immersion cavity 111 and is opposite vertically arranged with transmission shaft 12, the axial loading cylinder 31 output end is inserted into water immersion cavity 111 and is opposite parallelly arranged with transmission shaft 12, load sensor is provided on the axial loading cylinder 31 output end and radial loading cylinder 3 output end, the linkage structure includes linkage block 4 being arranged in water immersion cavity 111, the linkage block 4 top is bent with stress part 41, the axial loading cylinder 31 output end is connected with movable block 32, the movable block 32 is provided with movable groove 321 for the stress part 41 placement, the stress part 41 is provided with swing groove 42, the swing groove 42 is communicated with movable groove 321 and is provided with swing head 33 in swing groove 42, the swing head 33 is coaxially connected with the radial loading cylinder 3 output end, the movable block 32 is movably provided with bolt 34, the bolt 34 is sequentially arranged in movable block 32, stress part 41 and swing head 33, the test block 2 both sides wall is detachably connected with linkage plate 22, two the linkage plate 22 is detachably connected with linkage block 4, the linkage plate 22 is opposite vertically arranged with transmission shaft 12, the linkage plate 22 is evenly distributed with several adjusting grooves 221 along its opening direction, the adjusting groove 221 length direction is consistent with the opening direction of linkage plate 22, the linkage block 4 and adjacent adjusting groove 221 are detachably connected with several compression bolts 43, the water immersion cavity 111 inner wall is installed with baffle 13 for preventing water splash in water immersion cavity 111 when bearing to be tested is running, the baffle 13 is located in the position above connecting end 121 of transmission shaft 12, the baffle 13 both sides wall extends in the direction of water immersion cavity 111 bottom wall and has extension 131, the extension 131 is opposite inclinedly arranged with baffle 13, the driving member includes driving motor 14 being arranged in tool box 1, transmission belt 141 is driven with transmission shaft 12 end with driving motor 14 output end,The tool box 1 is further provided with a high-low temperature box assembly 15 for increasing or reducing the temperature inside the water immersion cavity 111 to simulate the temperature condition of the hub bearing in actual operation.

[0024] The bearing to be tested in the above-mentioned technology is indicated as 5 in the drawings.

[0025] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed for protection, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A low temperature water immersion tester for automotive wheel bearings, characterized by: The utility model provides a test device for bearing, which comprises a tooling box and a water immersion box arranged on the tooling box, wherein an inner cavity of the water immersion box is a water immersion cavity, the tooling box is provided with a water injection structure for injecting water flow into the water immersion cavity, the water immersion cavity is provided with a test block, one end of the test block is provided with a mounting hole for mounting an external bearing to be tested, the tooling box is provided with a transmission shaft and a driving member for driving the transmission shaft to rotate, the transmission shaft has a connecting end for penetrating into the water immersion cavity and being connected with an inner ring of the external bearing to be tested, the tooling box is provided with a first loading member for applying an axial load to the test block, a second loading member for applying a radial load to the test block and a linkage structure for linkage cooperation with the first loading member and the second loading member to combine the axial load and the radial load and apply them to the test block.

2. The low temperature water immersion tester for automobile wheel hub bearing according to claim 1, characterized in that: The first loading member comprises a radial loading cylinder arranged in the tooling box, the second loading member comprises an axial loading cylinder arranged in the tooling box, the output end of the radial loading cylinder is arranged in the water immersion cavity and is arranged vertically opposite to the transmission shaft, the output end of the axial loading cylinder is arranged in the water immersion cavity and is arranged parallel to the transmission shaft, and the output ends of the axial loading cylinder and the radial loading cylinder are both provided with load sensors.

3. The low temperature water immersion tester for automotive hub bearing of claim 2, wherein: The linkage structure comprises a linkage block arranged in the water immersion cavity, the linkage block is provided with a force receiving portion bent on the top of the linkage block, the output end of the axial loading cylinder is connected with a movable block, the movable block is provided with a movable slot for accommodating the force receiving portion, the force receiving portion is provided with an oscillation slot, the oscillation slot is in communication with the movable slot and is provided with an oscillation head arranged in the oscillation slot, the oscillation head is coaxially connected with the output end of the radial loading cylinder, the movable block is movably provided with a latch, the latch is sequentially arranged through the movable block, the force receiving portion and the oscillation head, the test block is detachably connected with linkage plates arranged on the two side walls of the test block, the two linkage plates are detachably connected with the linkage block, and the linkage plates are arranged vertically opposite to the transmission shaft.

4. The low temperature water immersion tester for automotive hub bearing of claim 3, wherein: The linkage plates are uniformly provided with a plurality of adjusting slots along the direction in which the linkage plates are arranged, the adjusting slots are arranged in the same direction as the direction in which the linkage plates are arranged, and the linkage block is detachably connected with a plurality of pressing bolts between adjacent adjusting slots.

5. The low temperature water immersion tester for automotive hub bearing of claim 1, wherein: A baffle is arranged on the inner wall of the water immersion cavity for preventing water in the water immersion cavity from splashing when the bearing to be tested is running, the baffle is arranged above the connecting end of the transmission shaft, the side walls of the baffle extend towards the bottom wall of the water immersion cavity and are arranged obliquely opposite to the baffle.

6. The low temperature water immersion tester for automotive hub bearing of claim 1, wherein: The driving member comprises a driving motor arranged in the tooling box, and the output end of the driving motor is drivingly connected with the transmission shaft through a transmission belt.

7. The low temperature water immersion tester for automotive hub bearing of claim 1, wherein: The tooling box is further provided with a high-low temperature box assembly for increasing or decreasing the temperature inside the water immersion cavity to simulate the temperature condition of the hub bearing in actual operation.

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