A method and apparatus for adjusting bearing assembly clearance

Abstract

This application discloses a method and apparatus for adjusting bearing assembly clearance, comprising the following steps: S1, pre-installing the bearing and tightening the bearing cap bolts to an initial torque value; S2, pressing the front end of a sleeve into the inner hole of the bearing's inner ring, wherein the rear end of the sleeve is provided with a torque applying element; S3, applying torque to the sleeve through the torque applying element until a relative displacement occurs between the inner and outer rings; S4, adjusting the tightening torque value of the cap bolts; S5, repeating steps S3 and S4 until a relative displacement occurs between the sleeve and the inner ring. Compared with the prior art, the bearing assembly clearance adjustment method and apparatus provided in this application can obtain the bearing installation clearance, have a simple structure, are easy to operate, and can effectively ensure the bearing assembly accuracy.

Description

Technical Field

[0001] This application relates to the field of heavy-duty engineering equipment technology, and more specifically, to a method and apparatus for adjusting bearing assembly clearance. Background Technology

[0002] Rolling bearings are precision mechanical components that convert the sliding friction between a rotating shaft and its housing into rolling friction, thereby reducing friction loss. Rolling bearings generally consist of four parts: an inner ring, an outer ring, rolling elements, and a cage. The inner ring mates with the shaft and rotates with it. The outer ring mainly mates with the bearing housing and provides support. The rolling elements are evenly distributed between the inner and outer rings with the help of the cage.

[0003] As a major type of rolling bearing, tapered roller bearings are mainly used to bear combined radial and axial loads, with radial loads being the primary component. Large tapered roller bearings, on the other hand, can be used to bear combined radial and axial loads, with axial loads being the primary component. These bearings are separable bearings, with the inner and outer rings installed separately. During assembly, the radial and axial clearances of the bearing need to be adjusted. The assembly accuracy between the inner and outer rings directly affects the surface wear, noise level, and service life of the bearing's inner and outer rings.

[0004] In the existing technology, the adjustment of bearing assembly clearance often relies on experience. For bearings assembled in batches, the adjustment standards of different operators cannot be unified.

[0005] Therefore, there is an urgent need for a bearing assembly clearance adjustment method and device that can be applied to the mass production process of bearings, with a simple structure, convenient operation, and to ensure the uniformity of bearing assembly clearance. Summary of the Invention

[0006] To solve the above-mentioned technical problems, this application provides a bearing assembly clearance adjustment method and device, which can be applied to the mass production process of bearings. It has a simple structure, is easy to operate, and ensures the uniformity of bearing assembly clearance.

[0007] The technical solution provided in this application is as follows:

[0008] A method for adjusting bearing assembly clearance includes the following steps:

[0009] S1. Pre-install the bearing and tighten the bearing cap bolts to the initial torque value;

[0010] S2. Press the front end of the sleeve into the inner hole of the inner ring of the bearing, and the rear end of the sleeve is provided with a torque applying element;

[0011] S3. Apply torque to the sleeve through the torque application component until a relative displacement occurs between the inner and outer rings;

[0012] S4. Adjust the tightening torque value of the gland bolts;

[0013] S5. Repeat steps S3 and S4 until a relative displacement occurs between the sleeve and the inner ring.

[0014] Preferably, the installation of the bearing and tightening of the bearing cap bolts to the initial torque value includes the following steps:

[0015] Install the outer ring of the bearing on the bearing housing;

[0016] The bearing is installed using any one of the following methods: press fitting, heat fitting, or cold fitting.

[0017] Press the gland onto the bearing, and use a torque wrench to tighten the gland bolts to the initial torque value using a cross-shaped method.

[0018] Preferably, the tightening torque value of the adjusting gland bolt further includes the following steps:

[0019] The tightening torque value is obtained based on the initial torque value, torque increment, and number of adjustments;

[0020] Use a torque wrench to tighten the gland bolts on the gland to the tightening torque value using the cross-shaped method.

[0021] Preferably, the fastening torque value is calculated according to the following formula: , among which, T i The torque is T0, the initial torque value, and i is the number of adjustments. This increases torque.

[0022] A bearing assembly clearance adjustment device, used in any of the bearing clearance adjustment methods described above, comprising:

[0023] A sleeve, the outer diameter of the front end of which is adapted to the inner hole of the bearing inner ring, for insertion into the inner hole of the bearing inner ring;

[0024] A torque-applying component that is fixedly sleeved on the outside of the sleeve and capable of driving the sleeve to rotate around the axis of the bearing;

[0025] Specifically, the surface roughness value of the outer wall of the sleeve is a preset roughness.

[0026] Preferably, it further includes:

[0027] The sleeve has circumferentially spaced openings that extend along the axial direction of the sleeve.

[0028] Preferably, the torque applying component is a wrench, and the sleeve is provided with a connector for use with the wrench.

[0029] Preferably, the sleeve and the connector are connected by a pin. The sleeve has a through hole, and the connector has a connecting hole that mates with the through hole. The pin passes through the connecting hole and the through hole to fix the sleeve and the connector.

[0030] Preferably, it further includes:

[0031] A force gauge used to measure the torque applied by the torque applicator.

[0032] Preferably, it further includes:

[0033] The wrench has at least two mounting holes that cooperate with the force gauge, and these mounting holes are spaced apart along the axial direction of the wrench.

[0034] This invention provides a method for adjusting bearing assembly clearance, comprising the following steps: S1, pre-installing the bearing and tightening the bearing cap bolts to the initial torque value. After pre-installation, a large clearance exists between the inner and outer rings of the bearing. Tightening the bearing cap bolts to the initial torque value initially adjusts the assembly clearance between the inner and outer rings of the bearing; S2, pressing the front end of a sleeve into the inner hole of the bearing inner ring. The rear end of the sleeve is provided with a torque applying element. The outer diameter of the front end of the sleeve is adapted to the inner hole of the inner ring. After pressing the sleeve into the inner hole of the bearing inner ring, a first frictional force exists between the inner ring of the bearing and the sleeve, and a second frictional force exists between the inner and outer rings of the bearing. The first frictional force is a fixed value, and the second frictional force varies with the adjustment of the bearing installation clearance. The process involves several steps: S3, applying torque to the sleeve using a torque applicator. When the applied torque is greater than the first frictional force but less than the second frictional force, a relative displacement occurs between the inner and outer rings of the bearing. Further adjustment of the bearing assembly clearance is required. S4, adjusting the tightening torque of the gland bolts to further adjust the bearing assembly clearance. S5, repeating S3 and S4 until the inner ring and sleeve slide relative to each other, and recording the final assembly torque value. At this point, the first frictional force is less than or equal to the second frictional force. Since the first frictional force between the sleeve and the inner ring is a fixed value, the relative sliding between the sleeve and the inner ring during assembly serves as a standard for measuring the tightness of the bearing assembly clearance, ensuring uniformity in the bearing assembly clearance. Therefore, compared to existing technologies, the bearing assembly clearance adjustment method in this embodiment can be applied to the mass production process of bearings. It has a simple structure, is easy to operate, and ensures uniformity in the bearing assembly clearance. This invention also provides a bearing assembly clearance adjustment device for use in the above-mentioned bearing assembly clearance adjustment method, which can also achieve the above technical effects, and will not be elaborated upon here. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A flowchart of a bearing assembly clearance adjustment method provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of a bearing assembly clearance adjustment device provided in an embodiment of the present invention;

[0038] Figure 3 for Figure 2 The main view;

[0039] Figure 4 This is a sectional view of AA.

[0040] Reference numerals: 1. Bearing; 2. Sleeve; 3. Torque applicator; 4. Opening groove; 5. Connector; 6. Pin; 7. Force gauge; 8. Connecting hole; 91. Gland; 92. Gland bolt; 93. Bearing housing. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0045] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0046] The embodiments of this invention are written in a progressive manner.

[0047] like Figures 1 to 4 As shown, this embodiment of the invention provides a bearing assembly clearance adjustment method, including the following steps: S1, pre-install bearing 1 and tighten the cover bolt 92 of bearing 1 to the initial torque value; S2, press the front end of sleeve 2 into the inner hole of the inner ring of bearing 1, and the rear end of sleeve 2 is provided with torque applying member 3; S3, apply torque to sleeve 2 through torque applying member 3 until a relative displacement occurs between the inner ring and the outer ring; S4, adjust the tightening torque value of cover bolt 92; S5, repeat steps S3 and S4 until a relative displacement occurs between sleeve 2 and the inner ring.

[0048] In the existing technology, the adjustment of bearing assembly clearance often relies on experience. For bearings assembled in batches, the adjustment standards of different operators cannot be unified.

[0049] This invention provides a bearing assembly clearance adjustment method, comprising the following steps: S1, pre-installing the bearing 1 and tightening the cover bolt 92 of the bearing 1 to the initial torque value. After pre-installation, there is a large clearance between the inner and outer rings of the bearing 1. Tightening the cover bolt 92 of the bearing 1 to the initial torque value initially adjusts the assembly clearance between the inner and outer rings of the bearing 1; S2, pressing the front end of the sleeve 2 into the inner hole of the inner ring of the bearing 1. The rear end of the sleeve 2 is provided with a torque applying element 3. The outer diameter of the front end of the sleeve 2 is adapted to the inner hole of the inner ring. After pressing the sleeve 2 into the inner hole of the inner ring of the bearing 1, there is a first frictional force between the inner ring of the bearing 1 and the sleeve 2, and a second frictional force between the inner and outer rings of the bearing 1. The first frictional force is a fixed value, and the second frictional force varies with the installation clearance of the bearing 1. The process involves several steps: S3, applying torque to the sleeve 2 via torque applicator 3. When the applied torque is greater than the first frictional force but less than the second frictional force, a relative displacement occurs between the inner and outer rings of bearing 1. Further adjustment of the bearing 1's assembly clearance is required. S4, adjusting the tightening torque of the gland bolt 92 to further adjust the bearing 1's assembly clearance. S5, repeating steps S3 and S4 until the inner ring of bearing 1 slides relative to the sleeve 2, and recording the final assembly torque value. At this point, the first frictional force is less than or equal to the second frictional force. Since the first frictional force between the sleeve 2 and the inner ring is a fixed value, the relative sliding between the sleeve 2 and the inner ring during assembly serves as a standard for measuring the tightness of the bearing 1's assembly clearance, ensuring uniformity in the bearing 1's assembly clearance. Therefore, compared to existing technologies, the bearing assembly clearance adjustment method in this embodiment can be applied to the mass production process of bearings. It has a simple structure, is easy to operate, and ensures uniformity in the bearing's assembly clearance.

[0050] In the above method, the assembly clearance between the inner and outer rings of bearing 1 and the assembly torque are linearly proportional, and the following relationship can be established:

[0051] Where M is the assembly torque value of the bearing, k0 is the proportionality coefficient, and I is the assembly clearance between the inner and outer rings of the bearing.

[0052] For bearings assembled in batches, when the assembly torque values ​​are the same, the assembly clearance between the inner and outer rings of bearing 1 is also the same. When the sleeve 2 and the inner ring slide relative to each other, the assembly torque is the first frictional force between the sleeve 2 and the inner ring. Since the first frictional force between the sleeve 2 and the inner ring is a fixed value, the assembly clearance between the inner and outer rings of bearing 1 is uniform.

[0053] Rolling bearings generally consist of four parts: an inner ring, an outer ring, rolling elements, and a cage. The inner ring mates with the shaft and rotates with it. The outer ring mates with the bearing housing and provides support. The rolling elements are evenly distributed between the inner and outer rings with the help of the cage.

[0054] In the above method, as one embodiment, the pre-installation of the bearing 1 and the tightening of the cover bolt 92 of the bearing 1 to the initial torque value in this embodiment of the invention includes the following steps: installing the outer ring of the bearing 1 in the bearing housing 93; performing preliminary tightening of the bearing 1 by any one of press fitting, hot fitting or cold fitting; pressing the cover 91 into the bearing 1, and tightening the cover bolt 92 on the cover 91 to the initial torque value by using a torque wrench in a cross-shaped manner. Specifically, the outer ring of the bearing is placed into the bearing housing 93, and the bearing 1 is initially tightened using any of the following methods: press fitting, hot fitting, or cold fitting. The cover is then pressed into the top of the bearing. When tightening the cover bolts 92 using a torque wrench in a cross-shaped manner, two cover bolts 92 should be tightened simultaneously using a centrally symmetrical method to ensure that the torque value and rotation speed of the two cover bolts 92 remain basically consistent. After each pair of cover bolts 92 is tightened to the initial torque value, the other cover bolts 92 should be tightened as soon as possible, striving to ensure that the entire ring of cover bolts 92 on the cover 91 is tightened synchronously to the initial torque value.

[0055] After the cover bolt 92 of bearing 1 is tightened to the initial torque value, the front end of sleeve 2 is pressed into the inner hole of the inner ring under its own weight. The rear end of sleeve 2 is provided with a torque application component. The torque is applied to sleeve 2 through the torque application component. It is observed whether there is a relative displacement between sleeve 2 and inner ring. If no relative displacement occurs, the torque is continued to be applied until a relative displacement occurs between inner ring and outer ring. At this time, the torque applied by the torque application component is greater than the second friction force but less than the first friction force.

[0056] Adjust the tightening torque value of the gland bolt 92. Specifically, use a torque wrench to tighten the gland bolt 92 on the gland 91 to the tightening torque value using a cross-shaped method. Since excessive torque when tightening a single gland bolt 92 can cause the outer ring to twist and deform, the increase in tightening torque value should not exceed 5 N·m each time, for the entire circle of gland bolts 92. Furthermore, when adjusting the tightening torque value of the gland bolt 92, the small clearance fit between the inner hole of the gland 91 and the outer ring of the bearing housing 93 (the clearance here is 0.04 mm to 0.09 mm) serves to guide the gland 91 along the axis.

[0057] In the above structure, as a more preferred embodiment, the fastening torque value in the present invention is calculated according to the following formula: , among which, T iThe torque is T0, the initial torque value, and i is the number of adjustments. This increases the torque. Initially, i=0, T i= T0, the next time the tightening torque value of the gland bolt 92 is adjusted, it will be adjusted by increasing the torque increment based on the previous tightening torque value, and Not exceeding 5 N·M.

[0058] In one embodiment of the above method, the torque applicator 3 is further equipped with a force gauge 7. The force gauge 7 can record the current torque value when relative displacement occurs between the inner and outer rings, and the assembly torque value when relative displacement occurs between the inner ring and the sleeve 2. The current torque value can be obtained from the current torque value and the lever arm of the applied force. The current torque value is the minimum load that needs to be applied when the inner ring of the bearing has circumferential displacement relative to the outer ring in the current state. Based on the assembly torque value and the lever arm of the applied force, the final assembly torque value is obtained. The current torque value and the assembly torque value provide guidance for the subsequent adjustment of the bearing installation clearance. More specifically, by measuring the current torque value in each debugging process and gradually increasing the test torque value in small increments, a more accurate assembly torque value under critical conditions can be obtained. The tightness of the final bearing assembly is converted into a quantitatively measurable torque for characterization, preventing the fit between the inner and outer rings of the bearing from being too tight or too loose.

[0059] This invention also provides a bearing assembly clearance adjustment device for use in the aforementioned bearing assembly clearance adjustment method. The device includes a sleeve 2 and a torque applicator 3. The front end of the sleeve 2 is adapted to the inner diameter of the inner ring of the bearing 1, and the outer surface of the front end of the sleeve 2 is adapted to the inner diameter of the inner ring, allowing the front end of the sleeve 2 to be inserted into the inner ring of the bearing 1. The torque applicator 3 is fixedly sleeved on the outside of the sleeve 2. The torque applicator 3 applies torque to the sleeve 2, causing it to rotate around the axis of the bearing 1. The sleeve 2 and the inner ring of the bearing 1 are interference-fitted. When the front end of the sleeve 2 is inserted into the inner ring of the bearing 1, the first frictional force between the sleeve 2 and the inner ring remains unchanged. When adjusting the bearing 1 assembly clearance, the second frictional force between the inner and outer rings is proportional to the assembly clearance. Thus, the magnitude of the second frictional force between the inner and outer rings can quantitatively provide feedback on the assembly clearance. The relative sliding between the sleeve 2 and the inner ring serves as a standard for measuring the tightness of the bearing 1 assembly clearance, ensuring the uniformity of the bearing 1 assembly clearance.

[0060] In the above structure, to facilitate better pressing of the large end of the sleeve 2 into the inner ring bore of the bearing 1, as one embodiment, the bearing assembly clearance adjustment device in this invention further includes an opening groove 4, wherein the opening groove 4 extends along the axial direction of the sleeve 2. Due to the presence of the opening groove 4, the sleeve 2 can be pressed into the inner ring bore of the bearing 1. Furthermore, as one embodiment, at least two opening grooves 4 are provided, and the opening grooves 4 are evenly spaced around the circumference of the sleeve 2.

[0061] Furthermore, in this embodiment of the invention, the width of the opening groove 4 is specifically 5mm.

[0062] Furthermore, the number of opening slots 4 in the embodiments of the present invention can be set as needed. As a specific implementation, there are 4 opening slots 4 in the embodiments of the present invention, and they are evenly spaced around the sleeve 2 in the circumferential direction.

[0063] Furthermore, as a more specific implementation, the surface roughness of the outer surface of the large end of the sleeve 2 in this embodiment of the invention is 0.8.

[0064] In the above structure, as one embodiment, the torque applying component 3 in this embodiment of the invention is specifically a wrench, and the rear end of the sleeve 2 is provided with a connector 5 for use with the wrench. Further, the wrench is provided with an internal hexagonal hole, and the connector 5 is provided with an external hexagonal end for use with the wrench. Through the cooperation between the wrench and the connector 5, torque is applied to the sleeve 2 by the wrench.

[0065] In the above structure, as one embodiment, the sleeve 2 and the connector 5 in the embodiment of the present invention can be an integrally formed structure, or the sleeve 2 and the connector 5 can be detachably connected. For ease of manufacturing, as a preferred embodiment, the sleeve 2 and the connector 5 in the embodiment of the present invention are specifically detachably connected.

[0066] In one specific implementation, the sleeve 2 and the connector 5 are connected by a pin 6. The sleeve 2 is provided with a through hole, and the connector 5 is provided with a connecting hole that cooperates with the through hole. The pin 6 passes through the connecting hole and the through hole to fix the sleeve 2 and the connector 5.

[0067] Furthermore, as one embodiment, the bearing assembly gap adjustment device in this embodiment of the invention further includes a force gauge 7, which is used to measure the torque applied during torque application. As one specific embodiment, the axial direction of the wrench in this embodiment of the invention is perpendicular to the axial direction of the bearing 1, the axial direction of the force gauge 7 is perpendicular to the axial direction of the wrench, and the axial direction of the force gauge 7 is perpendicular to the axial direction of the bearing 1.

[0068] Furthermore, as one embodiment, the assembly clearance adjustment device in this invention also includes mounting holes 8 disposed on the wrench and used in conjunction with the force gauge 7. At least two mounting holes 8 are provided and spaced apart along the axial direction of the wrench. In subsequent adjustment stages, the force gauge 7 can be moved to either mounting hole 8 as needed to adjust the lever arm.

[0069] Furthermore, as one embodiment, the force gauge 7 in this invention is provided with a hook at one end and a pull rod at the end away from the hook. By hooking the hook into the mounting hole 8, a torque force is applied to the wrench by pulling the pull rod on the force gauge 7. The torque value can be calculated by the reading of the force gauge and the distance between the force gauge and the bearing 1. Furthermore, as one embodiment, the mounting hole 8 in this invention is specifically a U-shaped hole.

[0070] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for adjusting bearing assembly clearance, characterized in that, Includes the following steps: S1. Pre-install bearing (1) and tighten the cover bolt (92) of bearing (1) to the initial torque value; S2. Press the front end of the sleeve (2) into the inner hole of the inner ring of the bearing (1), and the rear end of the sleeve (2) is provided with a torque application member (3). S3. Apply torque to the sleeve (2) through the torque application component (3) until a relative displacement occurs between the inner ring and the outer ring; S4. Adjust the tightening torque value of the gland bolt (92), which is calculated according to the following formula: , among which, T i The torque is T0, the initial torque value, and i is the number of adjustments. To increase torque; S5, repeat steps S3 and S4 until a relative displacement occurs between the sleeve (2) and the inner ring.

2. The bearing assembly clearance adjustment method according to claim 1, characterized in that, The pre-installed bearing (1) and the cover bolts (92) of the bearing (1) are tightened to the initial torque value, including the following steps: Install the outer ring of bearing (1) on bearing housing (93); The bearing (1) is installed using any one of the following methods: press fitting, heat fitting, or cold fitting; Press the cover (91) into the bearing (1), and use a torque wrench to tighten the cover bolt (92) on the cover (91) to the initial torque value using the cross method.

3. The bearing assembly clearance adjustment method according to claim 2, characterized in that, The tightening torque value of the adjusting gland bolt (92) also includes the following steps: Use a torque wrench to tighten the cover bolt (92) on the cover (91) to the tightening torque value using the cross method.

4. A bearing assembly clearance adjustment device, used in the bearing assembly clearance adjustment method according to any one of claims 1 to 3, characterized in that, include: Sleeve (2), the outer diameter of the front end of the sleeve (2) is adapted to the inner hole of the inner ring of the bearing (1) for insertion into the inner hole of the inner ring of the bearing (1); A torque application component (3) is fixedly sleeved on the outside of the sleeve (2) and is capable of driving the sleeve (2) to rotate around the axis of the bearing (1). The surface roughness value of the outer wall of the sleeve (2) is specifically a preset roughness.

5. The bearing assembly clearance adjustment device according to claim 4, characterized in that, Also includes: The sleeve (2) has circumferential openings (4) spaced apart, the openings (4) extending along the axial direction of the sleeve (2).

6. The bearing assembly clearance adjustment device according to claim 5, characterized in that, The torque application component (3) is specifically a wrench, and the sleeve (2) is provided with a connector (5) that works in conjunction with the wrench.

7. The bearing assembly clearance adjustment device according to claim 6, characterized in that, The sleeve (2) and the connector (5) are connected by a pin (6). The sleeve (2) has a through hole, and the connector has a connecting hole that works with the through hole. The pin (6) passes through the connecting hole and the through hole to fix the sleeve (2) and the connector (5).

8. The bearing assembly clearance adjustment device according to claim 4, characterized in that, Also includes: A force gauge (7) is used to measure the torque applied by the torque applicator (3).

9. The bearing assembly clearance adjustment device according to claim 8, characterized in that, Also includes: Mounting holes (8) are provided on the torque applicator (3) and used in conjunction with the force gauge (7). There are at least two mounting holes (8) and they are spaced apart along the axial direction of the torque applicator (3).

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