An axle bearing axial clearance measuring device and its usage method

Abstract

An axle bearing axial clearance measuring device and its usage method. The device includes a support platform, a lifting and fixing device, a transverse sliding device, a longitudinal sliding device, a measuring device, and a force applying device. The lifting and fixing device, the transverse sliding device, the longitudinal sliding device, and the measuring device are all arranged on the support platform. The longitudinal sliding device is connected to the transverse sliding device, and the force applying device is connected to the longitudinal sliding device. Its usage method is that the lifting and fixing device is used to lift the entire device to the axle and fix them together; the transverse sliding device and the longitudinal sliding device are used to drive the force applying device to move; the force applying device is used to push the axle hub to apply an axial force, and the measuring device measures the axial clearance of the bearing inside the hub. The present invention ensures the stability of the measurement result, improves the measurement accuracy and precision, realizes automated measurement, is simple and fast to operate, and improves the measurement efficiency.

Description

Technical Field

[0001] The present invention relates to a device for measuring the axial clearance of a bearing in a hub on an axle, belonging to the technical field of bearing axial clearance measurement. Background Art

[0002] The axial clearance of an automotive axle bearing, that is, the total axial spacing between the inner and outer rings of the axle hub bearing and its rolling elements, has a direct impact on aspects such as the running stability of mechanical products, the offset of the axle, the smoothness of rotation, and the service life. An inappropriate axial clearance will cause the bearing to bear unnecessary loads, accelerate the wear of the bearing, and shorten the service life of the bearing; in extreme cases, an inappropriate axial clearance may cause the bearing to overheat and even lead to safety accidents such as vehicle spontaneous combustion.

[0003] Currently, the method for detecting the axial clearance of a bearing usually involves a technician manually pushing and pulling the hub bearing or prying the wheel hub and the brake drum, while using a measuring tool (such as a feeler gauge or a radial runout gauge) to measure the axial clearance. This traditional detection method has many problems. For example, this method depends on the skills and experience of the operator, resulting in inconsistent measurement results, and using an unstable radial runout gauge and a simple crowbar as detection tools, which will all affect the accuracy of the measurement results.

[0004] Since the existing detection equipment cannot adapt to different types of axles and there is no clear measurement torque and measurement reference, the measurement volatility is relatively large, so it is difficult to ensure high-precision measurement results. Summary of the Invention

[0005] Aiming at the deficiencies of the existing bearing axial clearance measurement technology, the present invention provides an axle bearing axial clearance measurement device with a simple structure, convenient use, which can adapt to different types of axles and can provide consistent measurement torque and measurement reference, improving the measurement accuracy and precision. At the same time, a usage method of this device is provided.

[0006] The axle bearing axial clearance measurement device of the present invention adopts the following technical solutions:

[0007] This device includes a support platform, a lifting and fixing device, a lateral sliding device, a longitudinal sliding device, a measuring device, and a force applying device. The lifting and fixing device, the lateral sliding device, the longitudinal sliding device, and the measuring device are all arranged on the support platform. The longitudinal sliding device is connected to the lateral sliding device, and the force applying device is connected to the longitudinal sliding device. The lifting and fixing device is used to lift the entire device to the axle and fix them together; the lateral sliding device and the longitudinal sliding device are used to drive the force applying device to move; the force applying device is used to push the axle hub to apply an axial force, facilitating the measuring device to measure the axial clearance of the bearing in the hub.

[0008] The support platform includes a bottom plate, a transverse movement support plate, and a measurement support frame. The transverse movement support plate and the measurement support frame are both fixed on the bottom plate. The transverse movement support plate and the measurement support frame are in a vertical state on the bottom plate. The bottom plate is used to install a lifting and fixing device and a longitudinal sliding device. The transverse movement support plate is used to install a transverse sliding device. The measurement support frame is used to install a measurement device.

[0009] The lifting and fixing device includes a permanent magnet lifter and a lifting ring. The lifting ring is installed at the upper end of the permanent magnet lifter. The permanent magnet lifter is a prior art. The entire device is lifted to the axle through the lifting ring, and the entire device is fixed to the axle by the adsorption of the permanent magnet lifter.

[0010] The transverse sliding device includes a pushing mechanism, a transverse sliding rod, and transverse sliding blocks. The pushing mechanism is arranged on the transverse movement support plate of the support platform. The power output end of the pushing mechanism is connected to the transverse sliding rod. Two transverse sliding blocks are sleeved on the transverse sliding rod. The pushing mechanism adopts prior arts such as an electric push rod and a lead screw-nut pair moving mechanism. The electric push rod can be torque-controlled by a servo motor. Both of the two transverse sliding blocks can slide on the transverse sliding rod.

[0011] The longitudinal sliding device includes a two-way slide table, longitudinal sliding blocks, and a longitudinal sliding rod. The two-way slide table is installed on the bottom plate in the support platform. Two longitudinal sliding blocks are arranged in the two-way slide table. A longitudinal sliding rod is arranged on the longitudinal sliding block. One end of the longitudinal sliding rod is connected to the transverse sliding block in the transverse sliding device, and the other end of the longitudinal sliding rod is connected to the force application device. The two-way slide table adopts a two-way right-hand and left-hand thread linear guide slide table, which is a prior art. The two-way slide table drives the two longitudinal sliding blocks to move in opposite directions simultaneously, so that the longitudinal sliding rods on the two longitudinal sliding blocks open or close.

[0012] The measurement device includes a displacement sensor, a lifting mechanism, and a measurement sliding block. The lifting mechanism is installed on the measurement support frame in the support platform. A measurement sliding block is arranged on the lifting mechanism. The displacement sensor is installed on the measurement sliding block. The lifting mechanism adopts a lead screw-nut pair moving mechanism, which is a prior art. The displacement sensor adopts a laser displacement sensor. The lifting mechanism drives the displacement sensor to move through the measurement sliding block to realize up and down adjustment of measurement.

[0013] The force application device includes a gripping rod, a telescopic rod, an inner claw, and an outer claw. The gripping rod is connected to the longitudinal sliding rod in the longitudinal sliding device. An inner claw is arranged on the gripping rod. The telescopic rod is connected to the gripping rod. An outer claw is arranged on the telescopic rod. The telescopic rod is a telescopic pin rod (prior art). The distance between the outer claw and the inner claw is adjusted through the telescopic rod to adapt to different sizes of wheel hubs. The gripping rod drives the telescopic rod to move together with the longitudinal sliding rod to realize the opening or closing of the inner and outer claws on both sides. When closed, the wheel hub is held.

[0014] The usage method of the above-mentioned axle bearing axial clearance measuring device includes the following steps:

[0015] (1) Lift and transport the entire device to the axle through the lifting and fixing device and fix it to the axle.

[0016] (2) Adjust the laser point of the displacement sensor in the measuring device and accurately mark it on the inner end face of the hub on the axle.

[0017] (3) Drive the bidirectional slide table in the longitudinal sliding device to move the longitudinal sliders on both sides of it at the same time, and the longitudinal slide bars on both sides move with the longitudinal sliders at the same time to realize the opening or closing of the longitudinal slide bars on both sides until the distance between the longitudinal slide bars on both sides is adjusted to be suitable for the width of the hub on the axle.

[0018] (4) According to the length of the hub on the axle, adjust the length of the telescopic rod in the force-applying device so that the inner claw and the outer claw on the telescopic rod are on both sides of the length of the hub, and the hub is between the inner claw and the outer claw.

[0019] (5) Drive the transverse slide bar to move through the pushing mechanism in the transverse sliding device, and the longitudinal slide bar and the inner claw and the outer claw move with the transverse slide bar. Push the hub through the outer claw. When the pushing is blocked, the pushing mechanism stops running, and the first measurement is carried out through the displacement sensor to obtain the first measurement distance (the distance from the displacement sensor to the inner end face of the hub).

[0020] (6) After the first measurement is completed, the pushing mechanism pulls back the transverse slide bar. At this time, the inner claw pushes the hub. When the pushing is blocked, the pushing mechanism stops running. At this time, the displacement sensor conducts the second measurement to obtain the second measurement distance; the difference between the second measurement distance and the first measurement distance is the axial clearance of the axle bearing.

[0021] Compared with the prior art, the present invention has the following advantages and positive effects:

[0022] (1) Higher measurement accuracy and accuracy compared with existing products

[0023] By setting the torque-controlled electric push rod assembly, a constant measurement torque is provided, avoiding torque fluctuations caused by manual pushing, pulling or prying, ensuring the stability of the measurement results. At the same time, using a laser displacement sensor instead of a traditional feeler gauge or radial runout meter improves the measurement accuracy and accuracy.

[0024] (2) Easy and quick to use

[0025] Through the electric push rod, the bidirectional positive and negative thread linear guide slide table device and the force-applying device, automated measurement is realized, the operation is simple and quick, saving manpower and time. At the same time, it can adapt to different types of axles, improving the applicable range of the device. It has a display screen and operation buttons, and the operation is simple and easy to understand, facilitating user use.

[0026] (3) The device is safe and reliable

[0027] Using a permanent magnet lifter to fix the axle avoids the safety risks of manual operation. The electric push rod provides a constant measuring torque, avoiding the potential safety hazards caused by excessive pushing and pulling. When the measurement result is unqualified, the device will issue an alarm to alert the user.

[0028] (4) Easy to install and improve work efficiency

[0029] Adopting a modular design, each component can be conveniently assembled and disassembled, facilitating maintenance and transportation. At the same time, the device has a simple structure, is easy to install, does not require a complex debugging process, reduces manual operation, and improves the measurement efficiency. Description of the Drawings

[0030] Figure 1 is a top view structural schematic diagram of the axle bearing axial clearance measuring device of the present invention.

[0031] Figure 2 is a three-dimensional structural schematic diagram of the axle bearing axial clearance measuring device in the present invention.

[0032] In the figure: 1. Lifting and fixing device, 2. Support platform, 3. Transverse sliding device, 4. Longitudinal sliding device, 5. Measuring device, 6. Force applying device, 7. Axle, 8. Wheel hub;

[0033] 11. Permanent magnet lifter, 12. Hoisting ring;

[0034] 21. Transverse movement support plate, 22. Base plate, 23. Measuring support frame;

[0035] 31. Electric push rod, 32. Connector, 33. Transverse slide bar, 34. Transverse slider;

[0036] 41. Bidirectional sliding table, 42. Longitudinal slider, 43. Handwheel, 44. Linear slider, 45. Longitudinal slide bar;

[0037] 51. Displacement sensor, 52. Lifting mechanism, 53. Measuring slider, 54. Handwheel;

[0038] 61. Telescopic rod, 62. Connecting piece, 63. Slide bar, 64. Inner claw, 65. Outer claw. Detailed Embodiment

[0039] As Figure 1 and Figure 2 shown, the axle bearing axial clearance measuring device of the present invention has a structure including a support platform 2, a lifting and fixing device 1, a transverse sliding device 3, a longitudinal sliding device 4, a measuring device 5, and a force applying device 6. The lifting and fixing device 1 is arranged on the support platform 2 (see Figure 2), the lateral sliding device 3 is arranged on the support platform 2, the longitudinal sliding device 4 is arranged on the support platform 2 and connected to the lateral sliding device 3, and the force application device 6 is connected to the longitudinal sliding device 4. The measuring device 5 is arranged on the support platform 2.

[0040] See Figure 2 , the support platform 2 is composed of a bottom plate 22, a transverse movement support plate 21 and a measuring support frame 23. The transverse movement support plate 21 and the measuring support frame 23 are respectively fixed on the bottom plate 22 through connecting parts. The connecting parts are 90-degree connecting parts, so that the transverse movement support plate 21 and the measuring support frame 23 are in a vertical state on the bottom plate 22.

[0041] See Figure 2 , the lifting and fixing device 1 is composed of a permanent magnet lifter 11 and a lifting ring 12. The permanent magnet lifter 11 is a prior art and is connected to the bottom plate 22 in the support platform 2 through a nut. The lifting ring 12 is installed at the upper end of the permanent magnet lifter 11, so as to realize the equipment lifting work.

[0042] See Figure 1 , the lateral sliding device 3 is composed of an electric push rod 31, a lateral sliding rod and a lateral slider 34. The electric push rod 31 is a prior art and can be controlled by the torque of a servo motor. A connecting head 32 is installed at the head (power output end) of the electric push rod 31. The lateral sliding rod is connected to the connecting head 32, and the axis of the lateral sliding rod is perpendicular to the pushing direction of the electric push rod 31. A lateral slider 34 is sleeved on each side of the connecting head 32 on the lateral sliding rod, and both lateral sliders 34 can slide on the lateral sliding rod.

[0043] See Figure 2 , the longitudinal sliding device 4 is composed of a two-way slide table 41, a longitudinal slider 42, a linear slider 44 and a longitudinal sliding rod 45. The two-way slide table 41 adopts a two-way positive and reverse thread linear guide slide table, which is a prior art. Positive and reverse threads (left-handed and right-handed threads) are arranged on the ball screw, and a hand wheel 43 is installed at the right end of the ball screw to control the rotation of the screw. The two-way slide table 41 is installed on the bottom plate 22 in the support platform 2. A longitudinal slider 42 is connected to each of the positive and reverse thread parts on the ball screw in the two-way slide table 41. A linear slider 44 is arranged on the longitudinal slider 42, and the linear slider 44 is of a light shaft box type. A longitudinal sliding rod 45 is installed in the linear slider 44, and one end of the longitudinal sliding rod 45 is connected to the lateral slider 34 in the sliding device 3.

[0044] See Figure 2, the measuring device 5 is composed of a displacement sensor 51, a lifting mechanism 52 and a measuring slider 53. The lifting mechanism 52 adopts a lead screw-nut pair moving mechanism, which is a prior art and includes a vertical ball screw, one end of which is installed with a handwheel 54. The lifting mechanism 52 is installed on the measuring support frame 23 in the support platform 2. The measuring slider 53 is connected to the ball screw of the lifting mechanism 52. By turning the handwheel 54, the ball screw rotates to control the up and down movement of the measuring slider 53. The displacement sensor 51 is installed on the measuring slider 53 and uses a laser displacement sensor; the lifting mechanism 52 drives the measuring slider 53 to move up and down, and the displacement sensor 51 follows the measuring slider 53 to move, realizing up and down adjustment of the measurement.

[0045] See Figure 2 , the force applying device 6 is composed of a grasping rod 63, a connecting piece 62, a telescopic rod 61, an inner claw 64 and an outer claw 65. The grasping rod 63 is connected to the longitudinal sliding rod 45 in the longitudinal sliding device 4 and can move along with the longitudinal sliding rod 45. A connecting piece 62 is arranged on the grasping rod 63, which adopts a right-angle optical axis connecting piece (prior art) for connecting the right-angle part of the grasping rod 63 and the inner claw 64. The inner claw 64 is connected to the right-angle optical axis connecting piece 62, and a telescopic rod 61 is arranged. The telescopic rod 61 is a telescopic pin rod (prior art). The inner rod is distributed with positioning holes, and the outer rod is provided with pins. After the inner rod is stretched to the required length in the outer rod, the pins are inserted into the positioning holes to lock. An outer claw 65 is arranged on the telescopic rod 61 (the outer end of the inner rod), and the outer claw 65 is opposite to the inner claw 64. The distance between the outer claw 65 and the inner claw 64 can be adjusted through the telescopic rod 61 to adapt to different sizes.

[0046] For the usage method of the above axle bearing axial clearance measuring device, see Figure 1 , including the following steps:

[0047] (1) Lift the entire device through the lifting ring 12 so that the permanent magnet lifter 11 is placed on the outer cylindrical surface of the axle. Control the permanent magnet lifter 11 and fix the entire device on the outer cylindrical surface of the axle 7 through magnetic adsorption;

[0048] (2) Rotate the handwheel 54 in the measuring device 5. Through the lifting mechanism 52, lift and lower the measuring slider 53, and then adjust the laser point of the displacement sensor 51 connected to the measuring slider 53 to accurately mark it to the inner end face of the hub;

[0049] (3) Rotate the handwheel 43 in the longitudinal sliding device 4 to make the longitudinal sliders 42 on both sides of the bidirectional slide 41 move simultaneously. The longitudinal sliding rods 45 on both sides move along with the longitudinal sliders 42 through the linear sliders 44, realizing the opening or closing of the longitudinal sliding rods 45 on both sides until the distance between the longitudinal sliding rods 45 on the left and right sides is adjusted to be suitable for the width of the hub 8 on the axle 7;

[0050] (4) Adjust the length of the telescopic rod 61 according to the length of the hub 8 on axles of different models, so that the inner claw 64 and the outer claw 65 are on both sides of the length of the hub 8, and lock this length with a pin;

[0051] (5) Start the electric push rod 31. Its push rod extends and drives the transverse slide bar 33 to move through the connector 32. The longitudinal slide bar 45 and the inner claw 64 and the outer claw 65 thereon move together with the transverse slide bar 33. The hub 8 between the inner claw 64 and the outer claw 65 is pushed inward ( Figure 1 to the left in []) by the outer claw 65. When the hub 8 reaches the innermost side and is blocked, the electric push rod 31 stops running. At this time, the displacement sensor 51 makes the first measurement to obtain the first measurement distance;

[0052] (6) After the first measurement, retract the push rod of the electric push rod 31. The inner claw 64 drives the hub 8 to move outward ( Figure 1 to the right in []). When the hub 8 reaches the outermost side and is blocked, the electric push rod 31 stops running. At this time, the displacement sensor 51 makes the second measurement to obtain the second measurement distance; The difference between the second measurement distance and the first measurement distance is the axial clearance of the axle bearing.

[0053] After the measurement, the electric push rod 31 is reset.

Claims

1. An axle bearing axial clearance measuring device, characterized in that: It includes a supporting platform, a lifting and fixing device, a lateral sliding device, a longitudinal sliding device, a measuring device and a force applying device. The lifting and fixing device, the lateral sliding device, the longitudinal sliding device and the measuring device are all arranged on the supporting platform. The longitudinal sliding device is connected to the lateral sliding device, and the force applying device is connected to the longitudinal sliding device. The method for using the above device comprises the following steps: (1) Lift the entire equipment to the axle using a lifting and fixing device and fix it to the axle; (2) Adjust the laser point of the displacement sensor in the measuring device to accurately mark the inner end surface of the wheel hub on the axle; (3) driving the bidirectional slide in the longitudinal sliding device so that the longitudinal slide blocks on both sides thereof move simultaneously, and the longitudinal slide bars on both sides follow the longitudinal slide blocks and move simultaneously, so as to realize the opening or closing of the longitudinal slide bars on both sides, until the spacing between the longitudinal slide bars on both sides is adjusted to be compatible with the width of the wheel hub on the axle; (4) According to the length of the wheel hub on the axle, adjust the length of the telescopic rod in the force-applying device so that the inner claw and the outer claw on the telescopic rod are on both sides of the length of the wheel hub, and the wheel hub is between the inner claw and the outer claw; (5) The lateral sliding rod is driven to move by the pushing mechanism in the lateral sliding device, and the longitudinal sliding rod and the inner claw and the outer claw move together with the lateral sliding rod, and the wheel hub is pushed by the outer claw. When the pushing is blocked, the pushing mechanism stops running, and the first measurement is performed by the displacement sensor to obtain the first measurement distance; (6) After the first measurement is completed, the pushing mechanism pulls back the lateral slide bar. At this time, the inner claw pushes the wheel hub. When the push is blocked, the pushing mechanism stops running. At this time, the displacement sensor performs a second measurement to obtain the second measurement distance. The difference between the second measurement distance and the first measurement distance is the axial clearance of the axle bearing.

2. The axle bearing axial clearance measuring device according to claim 1 is characterized in that: The support platform comprises a base plate, a lateral support plate and a measuring support frame, and both the lateral support plate and the measuring support frame are fixed on the base plate.

3. The axle bearing axial clearance measuring device according to claim 2 is characterized in that: The lateral movement support plate and the measurement support frame are in a vertical state on the bottom plate.

4. The axle bearing axial clearance measuring device according to claim 1, characterized in that: The lifting and fixing device comprises a permanent magnetic lifter and a lifting ring, and the lifting ring is installed on the upper end of the permanent magnetic lifter.

5. The axle bearing axial clearance measuring device according to claim 1, characterized in that: The lateral sliding device comprises a pushing mechanism, a lateral sliding rod and a lateral sliding block. The pushing mechanism is arranged on the lateral support plate of the supporting platform. The power output end of the pushing mechanism is connected to the lateral sliding rod. Two lateral sliding blocks are mounted on the lateral sliding rod.

6. The axle bearing axial clearance measuring device according to claim 5, characterized in that: The pushing mechanism adopts an electric push rod controlled by a servo motor torque.

7. The axle bearing axial clearance measuring device according to claim 1, characterized in that: The longitudinal sliding device includes a bidirectional sliding platform, a longitudinal slider and a longitudinal sliding rod. The bidirectional sliding platform is installed on the bottom plate in the supporting platform. Two longitudinal sliders are arranged in the bidirectional sliding platform. The longitudinal slider is provided with a longitudinal sliding rod. One end of the longitudinal sliding rod is connected to the transverse slider in the transverse sliding device, and the other end of the longitudinal sliding rod is connected to the force applying device.

8. The axle bearing axial clearance measuring device according to claim 1, characterized in that: The measuring device comprises a displacement sensor, a lifting mechanism and a measuring slide block. The lifting mechanism is installed on a measuring support frame in a supporting platform. The lifting mechanism is provided with a measuring slide block, and the displacement sensor is installed on the measuring slide block.

9. The axle bearing axial clearance measuring device according to claim 1, characterized in that: The force applying device comprises a grab bar, a telescopic bar, an inner claw and an outer claw. The grab bar is connected to the longitudinal sliding bar in the longitudinal sliding device, and the grab bar is provided with an inner claw. The telescopic bar is connected to the grab bar, and the telescopic bar is provided with an outer claw.

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