Core shaft assembly for vibration measurement of double-inner-ring bearing

Abstract

The utility model discloses a double inner ring bearing vibration measurement core shaft assembly, comprising a vibration measurement core shaft, the initial end of the vibration measurement core shaft is a connection end used for plugging cooperation with an external bearing shaft hole to be detected, the tail end of the vibration measurement core shaft is a detection end used for cooperation with an external vibration measurement instrument, the connection end is detachably provided with a lock cover, and the lock cover is detachably provided with a locking groove. A stamping hole penetrates through the lock cover, a stamping part which is used for being in expansion fit with the stamping hole when external stamping equipment stamps the vibration measuring mandrel is coaxially connected to the connecting end, and a limiting part is annularly arranged on the outer circumferential wall of the vibration measuring mandrel. And a matching part which is used for being matched with the limiting part to clamp and limit the inner ring of the external to-be-detected bearing when the vibration measuring mandrel is stamped is annularly arranged at the initial end of the lock cover. According to the utility model, the problems of dynamic unbalance and instability of locking force each time caused by connection of the lock cover and the vibration measurement mandrel through a thread structure in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing vibration detection tooling, in particular to a core shaft component for vibration measurement of a double inner ring bearing. Background Art

[0002] With the continuous improvement of my country's industrialization level, the requirements for bearings are getting higher and higher, especially the noise of bearings. Vibration velocity and vibration acceleration are the main parameters for judging bearing noise. Double-row bearings, such as double-row angular contact ball bearings and double-row tapered roller bearings, usually have a double inner ring structure. When measuring vibration, it is necessary to provide axial preload to lock the two inner rings. The current locking method is to lock with threads. However, due to the dynamic imbalance of the thread structure itself and the instability of each locking force, the vibration measurement results of double-row bearings with double inner rings are unstable. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a double inner ring bearing vibration measuring core shaft assembly, in order to solve the problems in the prior art that the lock cover and the vibration measuring core shaft are connected by a threaded structure and are prone to dynamic imbalance and instability of each locking force.

[0004] To achieve the above-mentioned purpose, the utility model provides a core shaft assembly for vibration measurement of double inner ring bearings, including a vibration measuring core shaft, the starting end of the vibration measuring core shaft is a connecting end for plugging and mating with the shaft hole of an external bearing to be detected, the end of the vibration measuring core shaft is a detection end for cooperating with an external vibration measuring instrument, a locking cover is detachably provided on the connecting end, the locking cover is penetrated by a stamping hole, a stamping portion is coaxially connected to the connecting end for expansion fit with the stamping hole when the vibration measuring core shaft is stamped by an external stamping equipment, a limiting portion is circumferentially arranged on the outer peripheral wall of the vibration measuring core shaft, and a mating portion is circumferentially arranged at the starting end of the locking cover for cooperating with the limiting portion to achieve clamping and limiting of the inner ring of the external bearing to be detected when the vibration measuring core shaft is stamped.

[0005] The advantages of adopting the above technical scheme are as follows: when measuring the bearing to be tested, the shaft hole of the bearing to be tested is plugged into the connecting end, and the bearing to be tested is moved so that the side wall of one side of the inner ring of the bearing to be tested is abutted against the limiting portion. Then the operator punches the lock cover and the vibration measuring core shaft through an external press or a hydraulic cylinder, so that the punching portion of the vibration measuring core shaft is punched into the punching hole, that is, the outer peripheral wall of the punching portion is tightly connected with the inner peripheral wall of the punching hole. When the vibration measuring core shaft is punched, the matching portion on the lock cover gradually moves and abuts against the other side wall of the inner ring of the bearing to be tested, that is, the matching portion and the limiting portion are combined to form a clamping limit of the inner ring of the bearing to be tested on the connecting end, and then the vibration measuring core shaft is pressed. The detection end cooperates with an external vibration measuring instrument to start the detection of the vibration amount of the bearing to be detected; in the above technology, the vibration measuring core shaft and the lock cover are fastened together by stamping. At the same time, because the vibration measuring core shaft and the lock cover are coaxially connected and are both uniform rotating bodies, that is, the core shaft is approximately cylindrical and the lock cover is approximately annular, the dynamic balance of the overall tooling structure is guaranteed, and the fixed compressive stress applied by the hydraulic press can ensure that the locking force between the lock cover and the vibration measuring core shaft remains consistent, thereby avoiding the problem of unstable locking force; in the above technology, the size of the detection end can be designed according to different standards according to different measuring instruments, and then cooperate with the measuring instrument to realize the detection of bearing vibration speed, vibration acceleration and other data.

[0006] The utility model is further configured as follows: the inner circumferential wall of the stamping hole and the end face of the matching portion are connected by a smooth curved surface and form a first inclined surface; the outer circumferential wall of the stamping portion and the end face of the stamping portion are connected by a smooth curved surface and form a second inclined surface; the inclination direction of the first inclined surface is set in the same direction as the inclination direction of the second inclined surface.

[0007] The benefits of adopting the above technical solution are: the setting of the first inclined surface and the second inclined surface in the above technology facilitates the tight fit between the stamping part and the stamping hole when the vibration measuring core shaft is stamped, that is, when the vibration measuring core shaft is stamped by the hydraulic cylinder, the stamping efficiency and the stamping strength are improved through the cooperation of the first inclined surface and the second inclined surface, thereby improving the fastening strength between the stamping part and the stamping hole, and at the same time facilitating the balancing of the stamping force, that is, the fixed compressive stress applied by the hydraulic press can ensure that the locking force between the lock cover and the vibration measuring core shaft remains consistent, thereby avoiding the problem of unstable locking force.

[0008] The utility model is further provided that: the second inclined surface is inclined from the connecting end to the stamping part toward the axial direction of the stamping part.

[0009] The benefits of adopting the above technical solution are: in the above technology, the second inclined surface is inclined from the connecting end to the stamping part toward the axial direction of the stamping part, and the first inclined surface and the second inclined surface are arranged in the same direction, which is convenient for the fastening fit between the stamping part and the stamping hole, thereby improving the fastening strength between the stamping part and the stamping hole, and at the same time facilitating the balancing of the stamping force, that is, the fixed compressive stress applied by the hydraulic press can ensure that the locking force between the lock cover and the vibration measuring core shaft remains consistent, thereby avoiding the problem of unstable locking force.

[0010] The utility model is further provided that: a force-bearing ring is circumferentially arranged on the outer peripheral wall of the lock cover, and the force-bearing ring is integrally formed with the lock cover.

[0011] The benefit of adopting the above technical solution is that the setting of the force ring in the above technology makes it easy to apply force to the force ring through an external press or hydraulic cylinder after the vibration detection is completed to separate the lock cover from the vibration measuring core shaft, thereby improving the separation efficiency.

[0012] The utility model is further provided that: a deformation hole is opened on the end face of the stamping part along the axial direction thereof, and a horizontal plane at the opening of the initial end of the deformation hole is arranged flush with the end face of the stamping part.

[0013] The benefit of adopting the above technical solution is that the arrangement of the deformation hole in the above technology makes it easy for the stamping part to deform slightly when the stamping part and the stamping hole are tightly matched, thereby achieving a tight fit between the stamping part and the stamping hole.

[0014] The utility model is further provided that: an adjusting ring is threadedly connected to the outer peripheral wall of the lock cover, and the side wall surface of the adjusting ring is a matching surface for abutting against the side wall of the inner ring of the bearing to be detected outside.

[0015] The benefits of adopting the above technical solution are: when clamping and limiting bearings with larger sizes or wall thicknesses, in order to avoid insufficient limiting force for this type of bearing after the locking cover and the vibration measuring core shaft are stamped, an adjusting ring can be screwed into the locking cover, and the screwed-in adjusting ring can further achieve the abutment force against the side wall of the inner ring of the bearing to be tested, thereby further improving the limiting strength of the bearing and avoiding slight movement or slight displacement of the bearing during the detection process, which may affect the vibration detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the utility model;

[0017] Figure 2 for Figure 1 Simple view of installing the adjustment ring;

[0018] Figure 3 It is a cross-sectional view of the prior art. DETAILED DESCRIPTION

[0019] The utility model provides a core shaft assembly for vibration measurement of double inner ring bearings, comprising a vibration measurement core shaft 1, wherein the starting end of the vibration measurement core shaft 1 is a connecting end 11 for plugging and matching with the shaft hole of an external bearing to be detected, and the end of the vibration measurement core shaft 1 is a detection end 12 for matching with an external vibration measuring instrument, and a locking cover 2 is detachably provided on the connecting end 11, and a punching hole 21 is penetrated through the locking cover 2, and a punching portion 13 for expansion-matching with the punching hole 21 when the external punching equipment punches the vibration measurement core shaft 1 is coaxially connected to the connecting end 11, and a limiting portion 14 is circumferentially provided on the outer peripheral wall of the vibration measurement core shaft 1, and a matching portion 22 is circumferentially provided at the starting end of the locking cover 2 for matching with the limiting portion 14 when the vibration measurement core shaft 1 is punched to achieve clamping and limiting of the inner ring of the external bearing to be detected, and the inner peripheral wall of the punching hole 21 and the end face of the matching portion 22 are flat The smooth curved surface is connected to form a first inclined surface 211, the outer peripheral wall of the stamping part 13 and the end face of the stamping part 13 are connected by a smooth curved surface and a second inclined surface 131 is formed, the inclination direction of the first inclined surface 211 is arranged in the same direction as the inclination direction of the second inclined surface 131, the second inclined surface 131 is inclined from the connecting end 11 to the stamping part 13 toward the axial direction of the stamping part 13, a force ring 23 is annularly arranged on the outer peripheral wall of the lock cover, the force ring 23 is integrally formed with the lock cover, a deformation hole 132 is opened on the end face of the stamping part 13 along its axial direction, the horizontal plane at the opening of the starting end of the deformation hole 132 is flush with the end face of the stamping part 13, an adjustment ring 3 is threadedly connected to the outer peripheral wall of the lock cover, and the side wall surface of the adjustment ring 3 is a mating surface for abutting against the side wall of the inner ring of the bearing to be detected in the outside world.

[0020] The bearing to be tested described in the above technology is marked as 4 in the attached figure of the specification.

[0021] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A mandrel assembly for measuring vibration of a double inner ring bearing, characterized in that: It includes a vibration measuring core shaft, the starting end of the vibration measuring core shaft is a connecting end for plugging and matching with the shaft hole of an external bearing to be detected, the rear end of the vibration measuring core shaft is a detection end for matching with an external vibration measuring instrument, the connecting end is detachably provided with a locking cover, the locking cover is penetrated by a stamping hole, a stamping portion is coaxially connected to the connecting end for expansion matching with the stamping hole when the vibration measuring core shaft is stamped by an external stamping equipment, a limiting portion is circumferentially arranged on the outer peripheral wall of the vibration measuring core shaft, and a matching portion is circumferentially arranged at the starting end of the locking cover for matching with the limiting portion when the vibration measuring core shaft is stamped to achieve clamping and limiting of the inner ring of the external bearing to be detected.

2. A double inner ring bearing vibration measuring mandrel assembly according to claim 1, characterized in that: The inner wall of the stamping hole is connected to the end face of the mating part by a smooth curved surface and forms a first inclined surface. The outer wall of the stamping part is connected to the end face of the stamping part by a smooth curved surface and forms a second inclined surface. The inclination direction of the first inclined surface is set in the same direction as the inclination direction of the second inclined surface.

3. A double inner ring bearing vibration measuring mandrel assembly according to claim 2, characterized in that: The second inclined surface is inclined from the connecting end to the stamping portion toward the axial direction of the stamping portion.

4. A double inner ring bearing vibration measuring mandrel assembly according to claim 1, characterized in that: A stress-bearing ring is circumferentially arranged on the outer peripheral wall of the lock cover, and the stress-bearing ring is integrally formed with the lock cover.

5. The double inner ring bearing vibration measuring mandrel assembly according to claim 1, characterized in that: The end surface of the stamping part is provided with a deformation hole along its axial direction, and the horizontal plane at the opening of the initial end of the deformation hole is arranged flush with the end surface of the stamping part.

6. A double inner ring bearing vibration measuring mandrel assembly according to claim 1, characterized in that: An adjusting ring is threadedly connected to the outer peripheral wall of the locking cover, and the side wall surface of the adjusting ring is a matching surface for abutting against the side wall of the inner ring of the bearing to be detected in the outside world.

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