Bearing play adjustment device and method for assembling on a bearing housing

Abstract

The application provides a bearing clearance adjusting device and method for assembling a bearing on a hug axle box, which comprises a supporting seat, an adjusting piece, a driving piece and a detecting piece. The supporting seat is provided with a mounting portion for fixing a vehicle axle with the hug axle box sleeved thereon. The adjusting piece is used for being sleeved on the vehicle axle after the bearing is placed to a preset position, and the lower end of the adjusting piece is used for abutting against the upper surface of the inner ring of the bearing. The driving piece is used for applying a downward force to the adjusting piece, so that the adjusting piece drives the bearing to move downward through the inner ring of the bearing, and there is a spacing between the driving piece and the vehicle axle. The bearing clearance adjusting device and method for assembling a bearing on a hug axle box provided by the application is used for measuring the clearance between the inner side wall of the outer ring of the bearing and the bearing ball. The position of the bearing is adjusted when the bearing is heated to an expanded state, so that the workpiece damage caused by adjusting the position of the bearing after the bearing is relatively fixed with the vehicle axle after cooling is avoided, the service life of the workpiece is prolonged, and the overall use safety is ensured.

Description

Technical Field

[0001] This application relates to the field of bearing assembly technology, and in particular to a bearing clearance adjustment device and method for assembling bearings on a bearing housing. Background Technology

[0002] Electric locomotives, also known as electric trains, are trains that draw electrical energy from the power grid (overhead contact line) or rails and then drive the vehicles via electric motors. Electric locomotives are a product of the Second Industrial Revolution, but their large-scale development only occurred after the Third Industrial Revolution, and they are now the mainstay of modern trains. Electric locomotives possess many advantages, with overall performance far superior to steam and diesel locomotives. They are widely used not only in the operation of mainline railways but also in almost all urban rail transit systems.

[0003] The existing running gear of electric locomotives is an important component of electric locomotives. The running gear includes axles, gears, axle housings, first bearings, and second bearings. The gears and the first bearings are coaxially fixed on the axles. The bottom end of the first bearing abuts against the gear. The axle housing is tubular. The axle housing is lifted by a crane and fitted onto the axle from the top. The bottom end of the axle housing is rotatably connected to the first bearing. When the second bearing needs to be installed, the following steps are usually followed: (1) The axle housing is lifted by a crane. Mechanical centers are added between the axle housing and the gears. The mechanical centers lift the axle housing 0.5 to 2 mm from bottom to top; (2) The second bearing is subjected to high temperature treatment and is fitted onto the axle from the top. (2) Sleeve the top of the axle housing downwards until the second bearing cools down; (3) Remove the mechanical center and place the existing clearance adjustment fixture above the second bearing; (4) Connect the hydraulic equipment to the top of the axle and connect the clearance adjustment fixture. The hydraulic equipment drives the clearance adjustment fixture to apply downward pressure to the axle housing based on the axle; (5) Check the clearance between the non-gauge side drive bearing and the axle housing with a feeler gauge and calculate the amount of shims to be added based on the axial clearance between the two; (6) Insert a shim at the bottom of the axle housing and press the second bearing down with the clearance adjustment fixture; (7) Repeat steps (5) and (6) until the clearance between the second bearing and the axle housing is 0.09mm-0.15mm.

[0004] However, in the existing procedure, the second bearing is heat-fitted onto the axle. When it cools, the second bearing and the axle are relatively fixed. However, after the second bearing cools, the clearance needs to be adjusted. During the adjustment process, external forces such as hydraulic equipment are required to press down on the second bearing to adjust its position. This can easily damage the connection between the second bearing and the axle, posing a safety hazard. Summary of the Invention

[0005] In view of this, this application provides a bearing clearance adjustment device and method for assembling a bearing housing, in order to solve the problem that when adjusting the clearance between the bearing housing and the second bearing, the second bearing is prone to damage to the connection between the second bearing and the axle after adjusting its own position due to cooling, so as to ensure the safe use of the bearing.

[0006] To achieve the above objectives, this application provides a bearing clearance adjustment device and method for assembling a bearing housing, which adopts the following technical solution:

[0007] This application provides a bearing clearance adjustment device for assembling a bearing between an axle housing and an axle in the running gear of an electric locomotive. The axle housing is sleeved on the axle, and the bearing is located at the end of the axle housing away from the wheel on the axle. The device includes a support base, an adjustment component, a drive component, and a detection component.

[0008] The support base has a mounting part for fixing the axle fitted with the axle housing so that the axle is set vertically.

[0009] The adjusting member is used to be fitted onto the axle after the bearing is placed in a preset position, and the lower end of the adjusting member is used to abut against the upper surface of the inner ring of the bearing.

[0010] The drive member is used to apply a downward force to the adjusting member, so that the adjusting member drives the bearing to move downward through the inner ring of the bearing, and there is a gap between the drive member and the axle.

[0011] The testing device is used to measure the clearance between the inner wall of the outer ring of the bearing and the balls of the bearing.

[0012] By adopting the above technical solution, when the bearing needs to be installed, the bottom end of the axle is fixedly installed at the mounting part of the support seat to ensure the installation stability of the axle throughout the operation. At this time, the axle is set vertically, and the bearing is heated to the preset temperature, causing the bearing to be in an expanded state. The bearing is then lowered onto the axle from the top end until it is fitted into the preset position on the axle. Subsequently, the adjusting piece is fitted onto the axle from the top end until the bottom end of the adjusting piece abuts against the upper surface of the bearing inner ring. The driving component applies a downward force to the bearing inner ring through the adjusting piece, and the bearing moves downward under the action of the external force. The test piece measures the clearance between the inner wall of the bearing outer ring and the contact surface of the bearing balls until the clearance is adjusted to 0.09mm-0.15mm. When assembling the bearing clearance adjustment device on the axle housing, the bearings are installed in their expanded state, that is, the bearings and the axle are not relatively fixed. At this time, the bearing is pressed down to its preset position, and the clearance is adjusted to 0.09mm-0.15mm. After waiting for the bearing to cool down, the bearing position is adjusted, which avoids damage to the connection between the bearing and the axle after they are relatively fixed. This protects the workpiece and improves the overall safety of use.

[0013] In one possible implementation, the adjusting member includes a collar and a driving portion disposed on the collar, the end of the collar being used to abut against the upper surface of the inner ring of the bearing, and the driving member being used to apply a downward force to the driving portion.

[0014] By adopting the above technical solution, the collar is used to be fitted onto the axle, and its bottom end is used to abut against the upper surface of the bearing inner ring. The drive part is used to connect the drive component. When the adjustment component is required, the collar is fitted onto the axle from the upper end until the lower end of the collar abuts against the upper surface of the bearing inner ring. The drive component connects to the drive part of the adjustment component and applies a downward force to the drive part. The drive part and the collar are relatively fixed. As the drive part moves down, the collar applies a downward force to the bearing below. This adjustment component has a simple structure, is easy to operate, and ensures the efficiency of clearance adjustment.

[0015] In one possible implementation, the inner wall of the collar is used to abut against the axle, and the outer diameter of the collar is located between the inner diameter of the bearing inner ring and the outer diameter of the bearing inner ring.

[0016] By adopting the above technical solution, the outer diameter of the collar is located between the inner and outer diameters of the bearing inner ring. That is, the outer diameter of the collar is always smaller than the outer diameter of the bearing inner ring. This ensures that when the collar is fitted onto the axle, it is always located on the upper surface of the bearing inner ring, preventing the collar from slipping off the upper surface of the bearing inner ring due to its excessive diameter, thus ensuring the safety of the collar in use.

[0017] In one possible implementation, the drive unit includes at least two operating levers, each of which is circumferentially distributed on the outer peripheral wall of the collar.

[0018] By adopting the above technical solution, at least two operating rods are circumferentially distributed on the outer peripheral wall of the collar. The driving component applies force to the collar through the operating rods, so that the collar is subjected to uniform force, that is, the force of the collar pressing down on the bearing is uniform, which improves the stability of the bearing's downward movement and ensures the efficiency of clearance adjustment.

[0019] In one possible implementation, there are two levers, which are arranged opposite to each other.

[0020] By adopting the above technical solution, the two operating levers are symmetrically arranged on the collar. The symmetrical arrangement of the operating levers ensures the symmetry of the bearing force and further improves the uniformity of the bearing force.

[0021] In one possible implementation, the operating lever is located at the center of the collar.

[0022] By adopting the above technical solution, the operating rod located in the middle of the collar ensures the uniformity of the force applied to the collar by the driving component, thereby improving the placement efficiency of the collar.

[0023] In one possible implementation, the bearing clearance adjustment device assembled on the aforementioned bearing housing further includes a connector, through which the drive component is connected to the drive unit; the drive component is disposed on the support base.

[0024] By adopting the above technical solution, the drive component is installed on the support base and connected to the drive unit through the connector, which realizes the gapped fit between the drive component and the axle, avoids axle damage caused by the connection of the drive component to the axle, avoids losses and improves operational safety.

[0025] In one possible implementation, the connector includes a connector body and a connecting portion disposed on the connector body. There are at least two driving members and at least two driving members distributed circumferentially around the axle. The connector and the driving members are connected in a one-to-one correspondence, and the connecting portion is connected in a one-to-one correspondence with the operating lever.

[0026] By adopting the above technical solution, the connector body transmits the downward pressure applied by the drive component, and connects to the drive component of the adjustment component through the connecting part, thereby achieving a fixed connection between the drive component and the adjustment component and ensuring the stability of the downward pressure transmission.

[0027] The bearing clearance adjustment device assembled on the axle housing provided in this application, during operation, firstly fixes the bottom end of the axle to the mounting part of the support seat to ensure the installation stability of the axle throughout the operation. At this time, the axle is set vertically, and the bearing is heated to the preset temperature, so that the bearing is in an expanded state. The bearing is then lowered from the upper end of the axle onto the axle until the bearing is fitted into the preset position of the axle. Then, the collar is fitted from the upper end of the axle onto the axle until the lower end of the collar abuts against the upper surface of the bearing inner ring. The drive component is connected to the drive part of the adjustment component through the connecting component, and the adjustment component applies a downward force to the bearing inner ring. Under the action of the external force, the bearing moves downward. When the pressing stops, the clearance between the inner side wall of the bearing outer ring and the contact surface of the bearing balls is measured by the detection component. If the clearance is greater than 0.15mm, the pressing continues and the measurement continues until the clearance is adjusted to 0.09mm-0.15mm. In the assembly of the bearing clearance adjustment device on the axle housing, the bearings are installed in their expanded state, that is, the bearings and the axle are not relatively fixed. At this time, the bearing is pressed down to its preset position, and the clearance is adjusted to 0.09mm-0.15mm. After waiting for the bearing to cool down, the bearing position is adjusted, which avoids the connection between the bearing and the axle being damaged after the bearing and the axle are relatively fixed. This protects the workpiece and improves the overall safety of use.

[0028] On the other hand, this application also provides a method for testing the clearance of bearings assembled on a bearing housing, using the aforementioned bearing clearance adjustment device assembled on a bearing housing, the method comprising:

[0029] The axle fitted with the axle housing is inserted into the mounting part so that the axle is set vertically. The bearing is fitted onto the axle at a preset position from the upper end of the axle. The temperature of the bearing is greater than or equal to the preset temperature so that the bearing is in an expanded state.

[0030] The adjusting member is fitted onto the axle from the upper end, so that the lower end of the adjusting member abuts against the upper surface of the inner ring of the bearing.

[0031] The driving member applies a downward force to the adjusting member, and the adjusting member drives the bearing to move downward through the inner ring of the bearing;

[0032] The clearance between the inner wall of the outer ring of the bearing and the balls of the bearing is measured using the test piece until the clearance is adjusted to 0.09mm-0.15mm.

[0033] In one possible implementation, measuring the clearance between the outer ring of the bearing and the balls of the bearing using the detection element includes: measuring the clearance between the outer ring of the bearing and the balls of the bearing using a feeler gauge.

[0034] By adopting the above technical solution, the feeler gauge, also known as a thickness gauge, is made of thin steel sheet and consists of several gauges of different thicknesses. Each gauge is marked with its thickness in millimeters, and it is mainly used to check the gap between two mating surfaces. When measuring the clearance between the outer ring and the balls of a bearing, the feeler gauge is inserted into the gap between them and the data is read. Multiple measurements are taken during repeated force application to the drive component until the clearance is adjusted to 0.09mm-0.15mm. The precise thickness of the feeler gauge makes it an indispensable tool in the inspection process, ensuring the accuracy of bearing clearance measurement.

[0035] The bearing clearance adjustment device assembled on the axle housing provided in this application has a support base that fixes the axle and keeps it vertical. The bearing is heated to a preset temperature and, when it is in an expanded state, it is fitted onto the axle from the upper end until it reaches the preset position. Then, the adjustment piece is fitted onto the axle from the upper end until its lower end abuts against the upper surface of the bearing's inner ring. The drive component moves the adjustment piece downward, applying a downward force to the bearing below it. The drive component stops applying force, and the clearance between the inner wall of the bearing's outer ring and the bearing balls is detected by a detection component. If the clearance is greater than 0.15mm, the measurement stops, and the drive component continues to apply force, repeating the measurement until the clearance is adjusted to 0.09mm-0.15mm. In this method, the bearing is in an expanded state during bearing position adjustment, and the relative position between the bearing and the axle is not yet fixed. The force applied by the drive component to the adjustment piece facilitates the adjustment of the bearing position, avoiding workpiece damage caused by the bearing cooling down and the bearing and axle becoming relatively fixed during position adjustment. This extends the bearing's service life and improves overall safety. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Obviously, the drawings described below are some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the structure of the bearing clearance adjustment device assembled on the bearing housing provided in this embodiment of the application;

[0038] Figure 2 This is a cross-sectional view of the bearing position being adjusted when the bearing clearance adjustment device is assembled on the bearing housing provided in this embodiment of the application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1000 - Axle; 1100 - Axle housing; 1200 - Bearing;

[0041] 100-Support base;

[0042] 200 - Adjusting part; 210 - Collar; 220 - Drive unit;

[0043] 300-Driver;

[0044] 400 - Connector; 410 - Connector body; 420 - Connecting part.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0047] Secondly, it should be noted that in the description of this application, the terms "inner" and "outer," etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0048] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] Electric locomotives, also known as electric trains, are trains that draw electrical energy from the power grid (overhead contact line) or rails and then drive the vehicles via electric motors. Electric locomotives are a product of the Second Industrial Revolution, but their large-scale development only occurred after the Third Industrial Revolution, and they are now the mainstay of modern trains. Electric locomotives possess many advantages, with overall performance far superior to steam and diesel locomotives. They are widely used not only in the operation of mainline railways but also in almost all urban rail transit systems.

[0050] The existing running gear of electric locomotives is an important component of electric locomotives. The running gear includes an axle, gears, axle housing, first bearing and second bearing. The gears and the first bearing are coaxially fixed on the axle. The bottom end of the first bearing abuts against the gear. The axle housing is tubular. The axle housing is lifted by a crane and fitted onto the axle from the top of the axle. The bottom end of the axle housing is rotatably connected to the first bearing.

[0051] When a second bearing needs to be installed, the following steps are usually followed: (1) The crane lifts the axle housing, and a mechanical center is added between the axle housing and the gear. The mechanical center lifts the axle housing 0.5-2mm from bottom to top; (2) The second bearing is subjected to high temperature treatment and is fitted from the top of the axle downwards to the top of the axle housing until the second bearing cools down; (3) The mechanical center is removed, and the existing clearance adjustment fixture is placed above the second bearing; (4) The hydraulic equipment is connected to the top of the axle and the clearance adjustment fixture. The hydraulic equipment drives the clearance adjustment fixture to apply downward pressure to the axle housing with the axle as the base; (5) The feeler gauge is used to check the clearance between the non-feeder side drive bearing and the axle housing, and the amount of shims is calculated based on the axial clearance between the two; (6) A shim is inserted at the bottom of the axle housing, and the clearance adjustment fixture presses down on the second bearing; (7) Steps (5) and (6) are repeated until the clearance between the second bearing and the axle housing is 0.09mm-0.15mm.

[0052] However, in the existing procedure, the second bearing is heat-fitted onto the axle. When it cools, the second bearing and the axle are relatively fixed. However, after the second bearing cools, the clearance needs to be adjusted. During the adjustment process, external forces such as hydraulic equipment are required to press down on the second bearing to adjust its position. This can easily damage the connection between the second bearing and the axle, posing a safety hazard.

[0053] In view of this, this application provides a bearing clearance adjustment device and method for assembling a bearing housing, in order to solve the problem that when adjusting the clearance between the bearing housing and the second bearing, the second bearing is prone to damage to the connection between the second bearing and the axle after adjusting its own position due to cooling, so as to ensure the safe use of the bearing.

[0054] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0055] Figure 1 A schematic diagram of the structure of the bearing clearance adjustment device assembled on the bearing housing provided in this embodiment of the application; Figure 2 This is a cross-sectional view of the bearing position being adjusted when the bearing clearance adjustment device is assembled on the bearing housing provided in this embodiment of the application.

[0056] Reference Figures 1 to 2 As shown in the embodiments of this application, a bearing clearance adjustment device and method for assembling a bearing housing is provided, which adopts the following technical solution:

[0057] This application provides a bearing clearance adjustment device for assembling a bearing 1200 between an axle housing 1100 and an axle 1000 in the running gear of an electric locomotive. The axle housing 1100 is fitted onto the axle 1000, and the bearing 1200 is located at the end of the axle housing 1100 away from the wheel on the axle 1000. The device includes a support 100, an adjustment component 200, a drive component 300, and a detection component.

[0058] In the above description, the support base 100 has a mounting part for fixing the axle 1000, which is fitted with the axle housing 1100, so that the axle 1000 is set vertically. The adjusting member 200 is used to fit onto the axle 1000 after the bearing 1200 is placed in a preset position, and the lower end of the adjusting member 200 is used to abut against the upper surface of the inner ring of the bearing 1200.

[0059] Furthermore, the drive member 300 applies a downward force to the adjusting member 200, causing the adjusting member 200 to drive the bearing 1200 downward via the inner ring of the bearing 1200, and a gap exists between the drive member 300 and the axle 1000. The detection member is used to measure the clearance between the inner wall of the outer ring of the bearing 1200 and the balls of the bearing 1200.

[0060] Understandably, when the bearing 1200 needs to be installed, the bottom end of the axle 1000 is fixedly installed at the mounting part of the support 100 to ensure the installation stability of the axle 1000 throughout the operation. At this time, the axle 1000 is set vertically, and the bearing 1200 is heated to the preset temperature, causing the bearing 1200 to be in an expanded state. The bearing 1200 is then lowered from the top end of the axle 1000 onto the axle 1000 until the bearing 1200 is fitted into the preset position on the axle 1000. Subsequently, the adjusting member 200 is fitted from the top end of the axle 1000 onto the axle 1000 until the bottom end of the adjusting member 200 abuts against the upper surface of the inner ring of the bearing 1200. The driving member 300 applies a downward force to the inner ring of the bearing 1200 through the adjusting member 200. Under external force, bearing 1200 moves downward. The testing component measures the clearance between the inner wall of the outer ring of bearing 1200 and the contact surface of the bearing balls until the clearance is adjusted to 0.09mm-0.15mm. In the assembly of the bearing clearance adjustment device on the axle housing, bearing 1200 is installed in its expanded state, that is, bearing 1200 and axle 1000 are not relatively fixed. At this time, bearing 1200 is pressed down to its preset position. After the clearance is adjusted to 0.09mm-0.15mm, bearing 1200 is allowed to cool down. This realizes the position adjustment of bearing 1200 and avoids damage to the connection between bearing 1200 and axle 1000 after they are relatively fixed. This protects the workpiece and improves the overall safety of use.

[0061] As mentioned above, the existing technology requires a crane to lift the axle housing 1100 and a mechanical center to fix its initial position. However, in actual construction, the use of a crane will occupy a lot of space and hinder personnel operations. At the same time, the operation requires repeated measurement and calculation of the shim amount, which is complicated and inconvenient for the operator. Meanwhile, the hydraulic equipment in the existing technology needs to be fixed by connecting one end of the screw to the axle 1000. The hydraulic equipment is threaded to the screw and applies force to the bearing 1200 based on the screw. The screw bears a large pressure, and repeated operations will pose a risk of breakage and safety hazards.

[0062] However, in this solution, the axle clamping housing 1100 is fitted onto the axle 1000 without the need for a crane to lift it or for padding. The bottom end of the axle clamping housing 1100 is rotatably connected to the axle 1000. While the adjusting component 200 presses down on the bearing 1200, personnel push and support the axle clamping housing 1100 to rotate, ensuring uniform flatness. There is a gap between the driving component 300 and the axle 1000, eliminating the use of screws and ensuring the safety of the driving component 300.

[0063] In the above, rotate the bearing housing 1100 and adjust the bearing flatness to less than or equal to 0.1mm.

[0064] In some embodiments, the adjusting member 200 applies force to the bearing 1200 by its own weight, thereby pressing the bearing 1200 down. During the pressing process, the tilt direction of the adjusting member 200 is adjusted to achieve pressure adjustment. Taking the pressing of the bearing 1200 by the adjusting member 200 as the standard, the specific way and method of applying pressure to the bearing 1200 are all within the protection scope of this solution and will not be described in detail here.

[0065] The pressure adjustment of the adjusting component 200 can be adjusted by human touch.

[0066] In the above, the adjusting member 200 includes a collar 210 and a driving part 220 disposed on the collar 210. The end of the collar 210 is used to abut against the upper surface of the inner ring of the bearing 1200, and the driving member 300 is used to apply a downward force to the driving part 220.

[0067] In practical implementation, the collar 210 is used to be fitted onto the axle 1000, and its bottom end is used to abut against the upper surface of the inner ring of the bearing 1200. The drive part 220 is used to connect to the drive member 300. When the adjusting member 200 is required, the collar 210 is fitted onto the axle 1000 from the upper end until the lower end of the collar 210 abuts against the upper surface of the inner ring of the bearing 1200. The drive member 300 connects to the drive part 220 of the adjusting member 200 and applies a downward force to the drive part 220. The drive part 220 and the collar 210 are relatively fixed. As the drive part 220 moves down, the collar 210 applies a downward force to the bearing 1200 below. The adjusting member 200 has a simple structure, is easy to operate, and ensures the efficiency of clearance adjustment.

[0068] Furthermore, the inner wall of the collar 210 is used to abut against the axle 1000, and the outer diameter of the collar 210 is located between the inner diameter of the inner ring of the bearing 1200 and the outer diameter of the inner ring of the bearing 1200.

[0069] In other words, the outer diameter of the collar 210 is located between the inner and outer diameters of the inner ring of the bearing 1200. That is, the outer diameter of the collar 210 is always smaller than the outer diameter of the inner ring of the bearing 1200. This ensures that when the collar 210 is fitted onto the axle 1000, the collar 210 is always located on the upper surface of the inner ring of the bearing 1200. This prevents the collar 210 from slipping off the upper surface of the inner ring of the bearing 1200 due to its excessive diameter, thus ensuring the safety of the collar 210 in use.

[0070] In addition, the drive unit 220 includes at least two operating levers, each of which is circumferentially distributed on the outer peripheral wall of the collar 210.

[0071] Thus, during use, at least two operating levers are circumferentially distributed on the outer peripheral wall of the collar 210. The driving component 300 applies force to the collar 210 through the operating levers, so that the collar 210 is subjected to uniform force, that is, the force exerted by the collar 210 on the bearing 1200 is uniform, which improves the stability of the force on the bearing 1200 as it moves downward and ensures the efficiency of clearance adjustment.

[0072] Specifically, there are two control levers, which are set opposite to each other.

[0073] Thus, the two operating levers are symmetrically arranged on the collar 210. The symmetrical arrangement of the operating levers ensures the symmetry of the force on the bearing 1200 and further improves the uniformity of the force on the bearing 1200.

[0074] In some embodiments, the driving part 220 may be arranged in a ring shape, and the driving part 220 is sleeved on the outer wall of the collar 210.

[0075] Furthermore, the operating lever is located in the middle of the collar 210.

[0076] Understandably, the operating lever located in the middle of the collar 210 ensures the uniformity of the force applied by the drive component 300 to the collar 210, thereby improving the placement efficiency of the collar 210.

[0077] In some embodiments, the bearing clearance adjustment device assembled on the bearing housing described above further includes a connector 400, and the drive member 300 is connected to the drive unit 220 through the connector 400; the drive member 300 is disposed on the support base 100.

[0078] In practice, the drive unit 300 is mounted on the support base 100 and connected to the drive unit 220 through the connector 400, which realizes a spaced fit between the drive unit 300 and the axle 1000, eliminating the use of the screw, avoiding material loss and improving operational safety.

[0079] Specifically, the connector 400 includes a connector body 410 and a connecting part 420 disposed on the connector body 410. Both the drive member 300 and the connector 400 are provided with at least two. The at least two drive members 300 are distributed circumferentially around the axle 1000. The connector 400 and the drive members 300 are connected in a one-to-one correspondence. The connecting part 420 is connected in a one-to-one correspondence with the operating lever.

[0080] In this way, the connector body 410 transmits the downward pressure applied by the drive member 300 and connects to the drive part 220 of the adjustment member 200 through the connecting part 420, thereby achieving a fixed connection between the drive member 300 and the adjustment member 200 and ensuring the stability of the downward pressure transmission.

[0081] Furthermore, the connecting part 420 has a slot that engages with the operating lever.

[0082] During use, the connecting part 420 uses a slot to engage the operating lever with the fixed connecting part 400. This connection method is simple and efficient, ensuring the installation stability between the connecting part 400 and the adjusting part 200, and guaranteeing the transmission efficiency of the downward pressure.

[0083] In some embodiments, the connecting part 420 is horizontally rotatably connected to the connecting body 410. When installing the adjusting member 200, the operator can directly place it on the axle 1000 from the upper end and then rotate the two connecting members 400 until the operating lever is engaged in the slot; alternatively, the connecting part 420 of the two connecting members 400 can be rotated first so that the two operating levers are connected to the connecting member 400 through the slot, and then the driving member 300 drives the adjusting member 200 to fall from the upper end of the axle 1000 to the upper surface of the bearing 1200 through the connecting member 400. When only pressing down the bearing 1200 is required, the driving member 300 can be connected to the adjusting member 200 through the connecting member 400. The specific connection and operation are all within the protection scope of this application and will not be described in detail here.

[0084] For example, the drive unit 300 is one of a linear motor, a hydraulic cylinder, or a pneumatic cylinder.

[0085] The bottom end of the drive component 300 is mounted on the support base 100. When force is applied, the drive component 300 applies a downward stable transmission force to the adjustment component 200. The linear motor, hydraulic cylinder or pneumatic cylinder is easy to operate and operates smoothly, ensuring the efficient performance of clearance adjustment.

[0086] Furthermore, the driving method of the driving component 300 is based on achieving smooth downward pressure of the adjusting component 200, and all driving methods included are within the protection scope of this application, and will not be elaborated here.

[0087] The bearing clearance adjustment device assembled on the axle housing provided in this application, during operation, firstly fixes the bottom end of the axle 1000 at the mounting part of the support 100 to ensure the installation stability of the axle 1000 throughout the operation. At this time, the axle 1000 is set vertically, and the bearing 1200 is heated to the preset temperature, so that the bearing 1200 is in an expanded state. Then, the bearing 1200 is lowered from the upper end of the axle 1000 onto the axle 1000 until the bearing 1200 is fitted into the preset position of the axle 1000. Then, the collar 210 is fitted from the upper end of the axle 1000. The bearing is positioned on the axle 1000 until the lower end of the collar 210 abuts against the upper surface of the inner ring of the bearing 1200. The drive component 300 is connected to the drive part 220 of the adjustment component 200 through the connector 400, and applies a downward force to the inner ring of the bearing 1200 through the adjustment component 200. Under the action of the external force, the bearing 1200 moves downward. The downward pressure is stopped, and the clearance between the inner side wall of the outer ring of the bearing 1200 and the contact surface of the bearing 1200 balls is measured by the detection component. If the clearance is greater than 0.15mm, the downward pressure is continued and the measurement is continued until the clearance is adjusted to 0.09mm-0.15mm. In the assembly of the bearing clearance adjustment device on the axle housing, the bearing 1200 is installed in its expanded state, that is, the bearing 1200 and the axle 1000 are not relatively fixed. At this time, the bearing 1200 is pressed down to its preset position, and the clearance is adjusted to 0.09mm-0.15mm. After waiting for the bearing 1200 to cool down, the position adjustment of the bearing 1200 is realized. This avoids the connection between the bearing 1200 and the axle 1000 being damaged after the bearing 1200 and the axle are relatively fixed. This protects the workpiece and improves the overall safety of use.

[0088] On the other hand, this application also provides a method for testing the clearance of bearings assembled on a bearing housing, using the aforementioned bearing clearance adjustment device assembled on a bearing housing, the method comprising:

[0089] The axle 1000, which is fitted with the axle housing 1100, is inserted into the mounting part so that the axle 1000 is set vertically. The bearing 1200 is fitted onto the axle 1000 at a preset position from the upper end of the axle 1000. The temperature of the bearing 1200 is greater than or equal to the preset temperature so that the bearing 1200 is in an expanded state.

[0090] The adjusting member 200 is sleeved on the axle 1000 from the upper end, so that the lower end of the adjusting member 200 abuts against the upper surface of the inner ring of the bearing 1200.

[0091] The driving component 300 applies a downward force to the adjusting component 200, and the adjusting component 200 drives the bearing 1200 to move downward through the inner ring of the bearing 1200.

[0092] The clearance between the inner wall of the outer ring of bearing 1200 and the balls of bearing 1200 is measured using a test piece until the clearance is adjusted to 0.09mm-0.15mm.

[0093] As described above, measuring the clearance between the outer ring of the bearing 1200 and the balls of the bearing 1200 using a testing device includes: measuring the clearance between the outer ring of the bearing 1200 and the balls of the bearing 1200 using a feeler gauge.

[0094] Specifically, a feeler gauge, also known as a thickness gauge, is made of thin steel sheet and consists of several gauges of different thicknesses. Each gauge is marked with its thickness in millimeters, and it is mainly used to check the gap between two mating surfaces. When measuring the clearance between the outer ring and the balls of bearing 1200, the feeler gauge is inserted into the gap between them and the data is read. This is repeated multiple times while the drive component 300 is under repeated pressure, until the clearance is adjusted to 0.09mm-0.15mm. The precise thickness of the feeler gauge is an indispensable tool in the inspection process, ensuring the accuracy of the bearing 1200 clearance measurement.

[0095] The bearing clearance adjustment device assembled on the axle housing provided in this application has a support base 100 fixing the axle 1000 and keeping it vertical. The bearing 1200 is heated to a preset temperature and, when it is in an expanded state, is fitted onto the axle 1000 from the upper end until it reaches the preset position. Then, the adjustment member 200 is fitted onto the axle 1000 from the upper end until the lower end of the adjustment member 200 abuts against the upper surface of the inner ring of the bearing 1200. The driving member 300 drives the adjustment member 200 to apply downward force, and the adjustment member 200 applies a downward force to the bearing 1200 below it. The driving member 300 stops applying force and the clearance between the inner wall of the outer ring of the bearing 1200 and the bearing balls is detected by the detection member.

[0096] If the clearance is greater than 0.15mm, stop the measurement and continue to apply force to the drive component 300, repeating the measurement until the clearance is adjusted to 0.09mm-0.15mm. In this method, when adjusting the position of bearing 1200, bearing 1200 is in an expanded state, and the relative position between bearing 1200 and axle 1000 is not yet fixed. The drive component 300 applies force to the adjusting component 200 to facilitate the adjustment of bearing 1200's position. This avoids workpiece damage caused by adjusting the position after bearing 1200 has cooled and its relative position to axle 1000 has been fixed, extending the service life of bearing 1200 and improving overall operational safety.

[0097] Other embodiments of this application will readily come to mind when considering the specification and practicing the technical solutions disclosed herein.

[0098] This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary technical means in the art that are not disclosed in this application.

[0099] The description and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0100] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A bearing clearance adjustment device for assembling an axle housing, used for assembling a bearing between the axle housing and the axle in the running gear of an electric locomotive, wherein the axle housing is sleeved on the axle, and the bearing is located at the end of the axle housing opposite to the wheel on the axle, characterized in that, include: A support base has a mounting part for fixing the axle fitted with the axle housing so that the axle is vertically positioned. An adjusting member is used to be fitted onto the axle after the bearing is placed in a preset position, and the lower end of the adjusting member is used to abut against the upper surface of the inner ring of the bearing. A drive member is provided to apply a downward force to the adjusting member, so that the adjusting member drives the bearing to move downward through the inner ring of the bearing, and there is a gap between the drive member and the axle. A testing element, the testing element being used to measure the clearance between the inner wall of the outer ring of the bearing and the balls of the bearing; The bearing is fitted onto the axle at a predetermined position from the upper end of the axle, wherein the temperature of the bearing is greater than or equal to the predetermined temperature, so that the bearing is in an expanded state during installation. The adjusting member includes a collar and a driving part disposed on the collar. The end of the collar is used to abut against the upper surface of the inner ring of the bearing, and the driving member is used to apply a downward force to the driving part. The drive unit includes at least two operating levers, each of which is circumferentially distributed on the outer peripheral wall of the collar. It also includes a connector, through which the drive component is connected to the drive unit; the drive component is disposed on the support base; The connector includes a connector body and a connecting part disposed on the connector body. There are at least two driving members and at least two driving members distributed circumferentially around the axle. The connector and the driving members are connected in a one-to-one correspondence. The connecting part is connected in a one-to-one correspondence with the operating lever. The inner wall of the collar is used to abut against the axle, and the outer diameter of the collar is located between the inner diameter of the bearing inner ring and the outer diameter of the bearing inner ring. The number of operating levers is two, and the two operating levers are arranged opposite to each other.

2. The bearing clearance adjustment device assembled on the bearing housing according to claim 1, characterized in that, The operating lever is located in the middle of the collar.

3. A method for testing the clearance of bearings assembled on a bearing housing, using the bearing clearance adjustment device for bearings assembled on a bearing housing as described in any one of claims 1-2, characterized in that, The method includes: The axle fitted with the axle housing is inserted into the mounting part so that the axle is set vertically. The bearing is fitted onto the axle at a preset position from the upper end of the axle. The temperature of the bearing is greater than or equal to the preset temperature so that the bearing is in an expanded state. The adjusting member is fitted onto the axle from the upper end, so that the lower end of the adjusting member abuts against the upper surface of the inner ring of the bearing. The driving member applies a downward force to the adjusting member, and the adjusting member drives the bearing to move downward through the inner ring of the bearing; The clearance between the inner wall of the outer ring of the bearing and the balls of the bearing is measured using the test piece until the clearance is adjusted to 0.09mm-0.15mm.

4. The method for testing bearing clearance on a bearing housing according to claim 3, characterized in that, Measuring the clearance between the outer ring of the bearing and the balls of the bearing using the aforementioned testing device includes: The clearance between the outer ring of the bearing and the balls of the bearing is measured using a feeler gauge.

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