CN110657988B - Bearing axial test mechanism - Google Patents
Bearing axial test mechanism Download PDFInfo
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- CN110657988B CN110657988B CN201911107186.XA CN201911107186A CN110657988B CN 110657988 B CN110657988 B CN 110657988B CN 201911107186 A CN201911107186 A CN 201911107186A CN 110657988 B CN110657988 B CN 110657988B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to a bearing axial test mechanism which comprises a test unit, a swinging assembly and an axial loading assembly, wherein the test unit at least comprises a workbench, an inner ring follow-up assembly and a bearing test tool, the inner ring follow-up assembly at least comprises a bearing seat and a support shaft, the bearing test tool at least comprises a test shaft assembly and an outer ring fixing assembly, the test shaft assembly comprises a test shaft, a loading ferrule and a locking piece, the loading ferrule is respectively sleeved on the test shaft on two sides of the outer ring loading seat, one end of the loading ferrule is provided with an inner ring abutting end, two ends of the test shaft assembly are respectively connected with the support shafts of a pair of inner ring follow-up assemblies, a pair of inner ring non-flange cylindrical roller bearings which are arranged side by side is arranged between the support shaft and the bearing seat, and the inner ring is fixedly connected on the support shaft and is axially movably connected with the support shaft relative to the bearing seat. The invention has high connection efficiency, is suitable for various loading structures, and the reciprocating swing motion and the bidirectional push-pull load at the two ends are applied to the inner ring of the bearing to be tested without mutual interference.
Description
Technical Field
The invention relates to the technical field of bearing tests, in particular to a bearing axial test mechanism.
Background
The joint bearing is a mechanical universal part, has the characteristics of small volume and large bearing capacity, not only has the aligning function of reciprocating and deflecting the outer ring around the radial direction when in actual work, but also has the function of swinging or rotating the inner ring around the axis, so the bearing is widely applied to the fields of aviation, aerospace, train, automobile, mining machinery, machine tools, engineering machinery and the like.
The dynamic life of a spherical plain bearing is generally evaluated by a simulation testing machine, and in the existing bearing testing equipment, the bidirectional push-pull load of reciprocating swing around an axis and axial movement is respectively applied to an inner ring and an outer ring of the bearing. In the joint bearing, due to its complicated working conditions, it is not only subjected to reciprocating oscillation around the axis and bidirectional push-pull load moving along the axial direction, but also subjected to radial push-pull load and reciprocating oscillation around the radial direction. In order to simulate the working condition of the joint bearing more accurately, the traditional structure that axial push-pull load and reciprocating swing motion distribution around an axis are applied to the inner ring and the outer ring of the bearing to be tested cannot meet the test requirement. Therefore, there is a need for improvements to existing bearing test equipment.
Disclosure of Invention
The invention aims to solve the technical problem of providing a bearing axial test mechanism which is high in connection and assembly efficiency and suitable for various loading structures, wherein reciprocating swinging motion rotating around an axis and bidirectional push-pull load along the axial direction are applied to an inner ring of a bearing to be tested, and the reciprocating swinging motion and the bidirectional push-pull load are separated by the push-pull load and the swinging motion in the relative radial direction and do not interfere with each other.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides a bearing axial test mechanism, includes test unit at least, acts on the swing subassembly of test unit one side and acts on the axial loading subassembly of test unit opposite side, the test unit includes at least:
a work table;
the pair of inner ring follow-up assemblies are oppositely arranged and fixed on the workbench, each inner ring follow-up assembly at least comprises a bearing seat and a support shaft arranged in the bearing seat, the bearing seats are fixed on the workbench, a pair of inner ring flange-free cylindrical roller bearings which are arranged side by side are arranged between the support shafts and the bearing seats, outer rings of the inner ring flange-free cylindrical roller bearings are fixedly arranged relative to the bearing seats, and inner rings of the inner ring flange-free cylindrical roller bearings are fixedly connected to the support shafts;
the bearing test tool at least comprises a test shaft assembly and an outer ring fixing assembly, two ends of the test shaft assembly are respectively connected with supporting shafts of a pair of inner ring follow-up assemblies,
the supporting shaft at least comprises a bearing connecting section, a convex ring arranged at one end of the bearing connecting section and a supporting connecting part positioned at one side of the convex ring far away from the bearing connecting section,
the supporting connecting part comprises a fixed supporting part and a movable supporting part which are mutually matched and buckled, a supporting shaft hole is arranged in the supporting connecting part, a first key groove extending along the axial direction is arranged on the inner wall of the supporting shaft hole, a clamping groove is arranged at the position close to the bottom of the hole in the supporting shaft hole,
the test shaft assembly at least comprises:
the test shaft is used for penetrating through an inner ring of the bearing to be tested;
the pair of loading ferrules are respectively sleeved on the test shafts on two sides of the outer ring loading seat, one end of each loading ferrule is provided with an inner ring contact end, and a swing angle transmission structure is arranged between each loading ferrule and each test shaft;
and the locking piece is fixedly arranged at the free end of the test shaft and is used for fixing the loading ferrule between the locking piece and the outer ring loading seat.
In a preferred embodiment, a flange end cover is arranged at one end of the support shaft, which is far away from the support connecting part, and an inner ring of the inner ring flange-free cylindrical roller bearing is fixed between the flange end cover and the convex ring.
In a preferred embodiment, the test shaft at least comprises a test shaft section, swing angle transmission sections arranged on two sides of the test shaft section and locking sections connected with the swing angle transmission sections; the cross section of the swing angle transmission section is a polygon, and the diameter of an outer tangent ring of the polygon is not more than that of the test shaft section; and a test shaft mounting hole matched with the test shaft section and a swing angle transmission hole matched with the swing angle transmission section are formed in the loading ferrule.
In a preferred embodiment, the outer ring of the loading collar is provided with a pair of convex edges near the end portions of the two ends, an axial loading groove is formed between the pair of convex edges, and the part between the groove wall of the clamping groove in the support shaft hole and the end portion of the support connecting part is matched with the axial loading groove.
In a preferred embodiment, a second key groove matched with the first key groove is formed in the bottom of the axial loading groove, and the first key groove is connected with the second key groove through a flat key.
In a preferred embodiment, the oscillating assembly comprises at least:
the swing supporting seat is fixedly arranged;
one end of the axial loading shaft is provided with a swinging loading flange used for being connected with the supporting shaft, and the other end of the axial loading shaft is provided with a spline shaft;
the spline sleeve is axially and movably connected with the spline shaft;
the spline sleeve is fixedly connected with the spline connecting shaft, and the spline connecting shaft is rotatably and movably connected with the swing supporting seat;
the swing cylinder is fixedly connected to one side, far away from the axial loading shaft, of the swing support seat, and a swing angle sensor is arranged between an output shaft of the swing cylinder and the spline connecting shaft;
and the encoder component is arranged at one end of the swinging cylinder, which is far away from the swinging support seat.
In a preferred embodiment, the axial loading assembly comprises at least:
the loading supporting seat is fixedly arranged;
the linear loading cylinder body is fixedly connected with the loading support seat;
the piston rod is axially and movably connected with the linear loading cylinder body;
the guide shaft is axially and movably connected with the loading support seat and is positioned on one side of the loading support seat, which is far away from the linear loading cylinder body;
the pull pressure sensor is arranged between the piston rod and the guide shaft;
one end of the linear loading rod is rotatably and movably connected with the guide shaft, and a linear loading flange connected with the supporting shaft is arranged at the free end of the linear loading rod.
The bearing axial test mechanism has the following beneficial effects:
(1) in the inner ring follow-up component, the support shaft is connected with the bearing seat through a pair of inner ring flange-free cylindrical roller bearings, the outer ring of the inner ring flange-free cylindrical roller bearing is fixedly connected with the bearing seat, the inner ring is fixedly connected with the support shaft and is axially movably connected with the bearing seat, based on the characteristic of axial displacement between the inner ring and the outer ring of the inner ring flange-free cylindrical roller bearing and the connection relation of the inner ring flange-free cylindrical roller bearing, axial push-pull load can be applied to the bearing to be tested, the bearing can also be made to swing around the axis in a reciprocating manner, through ingenious structural design, the inner ring of the bearing to be tested can swing in a reciprocating manner and bear the axial push-pull load, the axial push-pull load and the axial push-pull load are not interfered with each other, and the inner ring follow-up component has the technical advantages of simple structure and ingenious conception.
(2) In the above construction, the axial push-pull load and the reciprocating oscillation rotating about the axis are both applied
The axial push-pull load and the reciprocating swing of the inner ring are not influenced no matter the outer ring of the bearing to be tested is fixedly arranged, movably arranged or various loads are applied to the outer ring, the axial push-pull load and the reciprocating swing of the inner ring are not interfered with each other with the outer ring of the bearing to be tested to form an independent load bearing form,
the traditional load application form is overturned.
(3) The support connecting part comprises a fixed support part and a movable support part which are mutually matched and buckled
The part, through the setting of movable support portion, changed experimental frock and the connected form that supports the connecting portion, promoted connection efficiency.
(4) The inner ring contact ends of the pair of loading ferrules are used for being pressed against the two inner rings of the bearing to be tested
The end is fixed through a locking piece; the load applied to the inner ring, particularly the axial bidirectional push-pull load, is loaded through the loading ring, so that the bearing can be suitable for testing of more types of bearings, for example, the working conditions of some bearings are that the inner ring and the test shaft are in interference fit, some bearings are in clearance fit, even some bearings can rotate relatively, and the bearings of all types can be loaded through the loading structure in the form.
Drawings
FIG. 1 is a schematic external structural view of a bearing axial test mechanism according to this embodiment;
FIG. 2 is a schematic view showing the external structure of the test unit in this embodiment;
FIG. 3 is a schematic diagram of a partially exploded structure of the test unit shown in FIG. 2;
FIG. 4 is a schematic cross-sectional structural view of the test unit shown in FIG. 2;
FIG. 5 is a structural diagram of the inner ring follower assembly in an exploded state in the present embodiment;
FIG. 6 is a schematic structural view of the support shaft of the present embodiment;
FIG. 7 is a schematic structural diagram of a bearing test fixture in this embodiment;
FIG. 8 is a schematic cross-sectional structural view of the bearing test fixture shown in FIG. 7;
FIG. 9 is a schematic diagram of the exploded structure of the bearing test fixture shown in FIG. 7;
FIG. 10 is a schematic structural view of a loading collar in the present embodiment;
FIG. 11 is a schematic structural diagram of a swing assembly in the present embodiment;
FIG. 12 is a schematic structural view of an axial loading shaft and a spline housing in the wobble assembly of the present embodiment;
FIG. 13 is a schematic structural diagram of an axial loading assembly in the present embodiment;
FIG. 14 is a cross-sectional structural view of the axial loading assembly of FIG. 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as a fixed connection, integrally connected, or detachably connected; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art will understand the specific meaning of the above terms in the present invention in specific situations.
As shown in fig. 1, the bearing axial test mechanism of the present embodiment includes a test unit 100, a swing assembly 200 acting on one side of the test unit, and an axial loading assembly 300 acting on the other side of the test unit. Wherein the oscillating assembly 200 is adapted to apply reciprocating oscillations rotating about an axis and the axial loading assembly 300 is adapted to apply axial push-pull loads, wherein the axial push-pull loads are applied bi-directionally.
As shown in fig. 2 to 4, the experiment unit of the present embodiment includes a table 110, and the table 110 is fixed. A pair of inner ring follower assemblies 120 are fixed to the table 110. Specifically, the inner race follower assembly 120 is constructed as shown in fig. 3 to 5, and includes a bearing housing 121 fixed to the table 110, in which a support shaft 122 is installed.
A pair of inner ring non-flange cylindrical roller bearings 123 arranged side by side is arranged between the support shaft 122 and the bearing seat 121, an outer space ring 127 is arranged between the outer rings of the pair of inner ring non-flange cylindrical roller bearings 123, bearing end covers 124 are respectively installed at two ends of the bearing seat 121, an end cover hole for accommodating the support shaft 122 to pass through is arranged at the center of each bearing end cover 124, the end surfaces of the bearing end covers 124 at two sides are respectively attached to the end surfaces of the outer rings of the inner ring non-flange cylindrical roller bearings 123, and therefore the outer rings of the pair of inner ring non-flange cylindrical roller bearings 123 are fixed in the bearing seats.
The structure of the supporting shaft 122 is as shown in fig. 6, and includes a bearing connecting section 1221, a convex ring 1225 disposed at one end of the bearing connecting section, and a supporting connecting portion located at a side of the convex ring away from the bearing connecting section. The pair of inner ring non-flange cylindrical roller bearings 123 are sleeved on the bearing connecting section 1221 of the support shaft 122. Preferably, the inner ring of the inner ring non-flange cylindrical roller bearing 123 close to one side of the protruding ring abuts against one side end face of the protruding ring, and in this embodiment, an inner spacer 128 is further disposed between the protruding ring and the inner ring of the inner ring non-flange cylindrical roller bearing 123.
In the present embodiment, an inner spacer 128 is provided between the inner rings of the pair of inner ring non-flange cylindrical roller bearings 123 corresponding to the outer spacer 127. A flange end cover 126 is attached to an end of the support shaft 122 remote from the convex ring, and one end surface of the flange end cover 126 is attached to the inner ring of the inner ring non-flange cylindrical roller bearing, so that the inner rings of the pair of inner ring non-flange cylindrical roller bearings are fixed between the flange end cover and the convex ring.
In the above-described connection structure, since the bearing is an inner ring non-flange type cylindrical roller bearing, and the inner ring non-flange type cylindrical roller bearing is characterized in that the inner ring and the outer ring are relatively movable in the axial direction, in the connection structure of the present embodiment, the axial displacement between the inner ring and the outer ring of the inner ring non-flange type cylindrical roller bearing, that is, the axial displacement between the support shaft and the bearing seat, is not limited. Therefore, the axial push-pull load and the reciprocating swing around the axis can be simultaneously applied to the support shaft, the structure of the bearing seat does not influence the application of various superposed loads, the support shaft is used for being connected with the inner ring 11 of the bearing 10 to be tested, and the superposed loads can be applied to the inner ring 11 of the bearing 10 to be tested through the support shaft and do not interfere with the application of the load on the outer ring 12 of the bearing 10 to be tested, so that a relatively independent load application form is formed.
As shown in fig. 6, the supporting connection portion of the present embodiment includes a fixed supporting portion 1222 and a movable supporting portion 1223 that are engaged with each other, and a supporting shaft hole is formed in the supporting connection portion formed by engaging the fixed supporting portion 1222 and the movable supporting portion 1223.
The inner wall of the supporting shaft hole is provided with two opposite key slots 1224 extending along the axial direction. Furthermore, a clamping groove 1227 is arranged at a position close to the hole bottom in the support shaft hole, and an avoiding groove 1226 is arranged at the hole bottom of the support shaft hole.
In this embodiment, the bearing test fixture 130 for fixing the bearing 10 to be tested is further included, and the structure of the bearing test fixture is as shown in fig. 7 to 10, and the bearing test fixture includes a test shaft assembly 131 and an outer ring fixing assembly 132, where two ends of the test shaft assembly are respectively connected to the support connection portions of the support shafts of the pair of inner ring follow-up assemblies.
Specifically, the test shaft assembly 131 of the present embodiment includes a test shaft 1310, a loading collar 1320, and a locking member 1340.
As shown in fig. 9, the test shaft 1310 of the present embodiment includes a test shaft segment 1311, a swing angle transmission segment 1312 disposed at both sides of the test shaft segment 1311, and a locking segment 1313 connected to the swing angle transmission segment. The test shaft 1310 is symmetrical in the axial direction, i.e., the swing angle transmission section 1312 and the locking section 1313 at both ends are symmetrical to each other. The test shaft segment 1311 is configured to penetrate through the inner ring 11 of the bearing 10 to be tested, and preferably, the bearing 10 to be tested is located in the middle of the test shaft 1310.
In a preferred embodiment, the swing angle transfer section 1312 in this embodiment has a polygonal cross section, in this embodiment a regular quadrilateral cross section, wherein the outer circle diameter of the polygonal cross section is not larger than the diameter of the test shaft section 1311.
In a preferred embodiment, the locking section 1313 is provided with external threads, and the locking member 1340 is screwed with the locking section 1313.
As shown in fig. 8-10, the loading collars 1320 of the present embodiment have two, respectively symmetrically installed on both sides of the outer ring fixing component 132. The inner part of the loading mechanism is provided with a test shaft mounting hole 1323 matched with the test shaft section 1311 and a swing angle transmission hole 1324 matched with the swing angle transmission section, wherein the swing angle transmission section and the swing angle transmission hole form a swing angle transmission structure between the loading ferrule and the test shaft, and swing angle load applied to the loading ferrule by the loading mechanism is transmitted to the test shaft through the swing angle transmission structure.
In this embodiment, one end of the loading collar 1320 is provided with an inner ring abutting end 1327, the inner ring abutting end 1327 is used for abutting against an end surface of the inner ring 11 of the bearing 10 to be tested, and the inner ring abutting ends 1327 of the pair of loading collars 1320 abut against and fix the inner ring 11, so that a load applied to the inner ring, especially an axial bidirectional push-pull load, is loaded through the loading collar, and can adapt to a wider variety of bearing tests.
In a preferred embodiment, the outer ring of the loading collar 1320 has a pair of raised edges 1322 near each end, with an axial loading slot 1326 defined between the pair of raised edges 1322. The width of the axial loading slot 1326 is matched with the part between the slot wall of the clamping slot in the support shaft hole and the end part of the support connecting part, and the axial loading slot and the part are matched to be used for transmitting the axial push-pull load of the support shaft to the loading ferrule and further applying the axial push-pull load to the inner ring 11 through the loading ferrule.
In a preferred embodiment, the bottom of the axial loading slot 1326 is provided with at least two second key slots 1325, and the second key slots 1325 are provided with flat keys 1330. The reciprocating oscillation of the loading member on the loading collar is transmitted through the flat key 1330. Preferably, the plurality of second key slots 1325 are uniformly distributed along the circumferential direction. The position and structure of the second keyway 1325 are matched with the first keyway, and the second keyway 1325 is connected with the first keyway through a flat key 1330 and transmits reciprocating swing.
In a preferred embodiment, an avoiding outer conical surface 1328 is arranged between the abutting end 1327 of the inner ring and the convex edge of the same end, and the avoiding outer conical surface 1328 can effectively prevent the loading ferrule from generating motion interference with the outer ring of the bearing to be tested or the outer ring loading seat, thereby further ensuring a test mode that the loading of the inner ring and the loading of the outer ring are independent and do not interfere with each other.
As shown in fig. 7-9, the locking member 1340 of this embodiment is fixedly disposed at the free end of the test shaft and is used to secure the loading collar between the locking member and the outer race loading seat. The locking piece is provided with an internal thread hole 1341 matched with the locking section so as to realize threaded connection with the locking section.
In a preferred embodiment, the locking member is provided with a plurality of screw holes 1343 radially penetrating through the locking member, the screw holes 1343 are used for installing screws 1344, and the screws 1344 abut against the locking section in the radial direction, so that the locking is effectively prevented.
In a preferred embodiment, the outer ring of the locking member is provided with at least two axially extending slots 1342, and the slots 1342 are used for facilitating the assembly tool to act on the slots 1342 for the assembly and disassembly of the locking member.
In addition, the structure in which the locking member is located can enter the avoidance groove 1226.
As shown in fig. 11, the swing assembly 200 of the present embodiment includes a swing support base 210, and the swing support base 210 is fixedly disposed, and is generally fixedly disposed on the equipment rack.
In this embodiment, an axial loading shaft 220 is disposed on one side of the swing assembly 200, a swing loading flange 222 for connecting with the support shaft is disposed on one end of the axial loading shaft, and the swing loading flange 222 is fixedly connected with the flange end cover 126 for transmitting the reciprocating swing of the swing assembly to the support shaft.
As shown in fig. 11 to 12, in the present embodiment, the other end of the axial loading shaft 220 is a spline shaft 221, and a spline housing 223 fittingly connected to the spline shaft 221 is connected to the swing support base 210 through a spline connection shaft 260. The spline housing is axially movably connected with the spline shaft, preferably, the spline housing 223 is a ball spline, a plurality of rows of balls 225 are arranged in the ball spline and matched with the spline grooves 224 on the spline shaft 221, and the ball spline has the advantage of smaller friction resistance.
The spline shaft and the spline housing are used for eliminating axial displacement when the inner ring of the bearing to be measured generates axial displacement after receiving axial push-pull load, so that the swinging assembly is not influenced. Meanwhile, the reciprocating swing of the swing assembly can be transmitted through the ball and the spline groove.
Wherein, the swing support base 210 is provided with a connecting flange 211, and the spline connecting shaft 260 is rotatably and movably connected with the connecting flange 211. The other side of the swing support base 210 is provided with a swing cylinder 240, the swing cylinder 240 is fixed on the swing support base 210 through a connecting plate 212, an output shaft of the swing cylinder 240 is connected with a spline connecting shaft 260, and preferably, a torque sensor 230 is arranged between the output shaft of the swing cylinder 240 and the spline connecting shaft 260 for monitoring and controlling output reciprocating swing.
In addition, an encoder assembly 250 is further disposed at an end of the swing cylinder 240 away from the swing support base, and is used for acquiring data and controlling a working state of the swing cylinder.
As shown in fig. 13-14, the axial loading assembly 300 of the present embodiment is provided with a load support base 310, which is fixedly disposed, typically on a rack. One side of the loading supporting seat 310 is fixedly connected with a linear loading cylinder 320, a piston rod 330 is arranged in the linear loading cylinder 320, the piston rod 330 is axially and movably connected with the linear loading cylinder, and the expansion and contraction of the piston rod 330 is used for applying axial bidirectional push-pull load of the bearing to be tested.
One side of the loading supporting seat far away from the linear loading cylinder body is provided with a linear bearing sleeve 361, a guide shaft 360 is connected in the linear bearing sleeve 361, and the guide shaft 360 is connected with the loading supporting seat in an axial moving mode through the linear bearing sleeve 361.
Wherein, one end of the guide shaft 360 is fixedly connected with the piston rod 330. Preferably, a tension and pressure sensor 340 is disposed between the guide shaft 360 and the piston rod 330 for acquiring and monitoring the magnitude of the linear loading force.
In this embodiment, the other end of the guide shaft 360 is a connecting flange end 362, the connecting flange end 362 is connected with a connecting sleeve 363, and a bearing cavity is formed between the connecting flange end 362 and the connecting sleeve 363.
The axial loading assembly 300 of the present embodiment further includes a linear loading rod 350, one end of the linear loading rod 350 is provided with a linear loading flange 351, and the linear loading flange 351 is fixedly connected with the flange end cover 126 and is used for transmitting a linear moving load to the support shaft.
The other end of the linear loading rod 350 is located in the bearing cavity, the end of the linear loading rod is connected with the inner cavity of the bearing cavity through the deep groove ball bearing 353, and the end of the linear loading rod is provided with a locking piece 352 for fixing the deep groove ball bearing 353 on the end of the linear loading rod in the bearing cavity.
In this embodiment, the connection between the bearing cavity and the linear loading rod 350 forms a motion separation mechanism, wherein the linear loading rod is used to transmit the push-pull load of the piston rod to the supporting shaft, and the loading rod simultaneously bears the reciprocating swing of the swing component along with the transmission of the supporting shaft, so as to form the linear motion of the linear loading rod and simultaneously rotate the linear motion. So that the loads of the axial loading assembly and the swinging assembly coexist and do not interfere with each other.
In this embodiment, the free end of the linear loading cylinder 320 is provided with a fixed plate 370, and the free end of the piston rod is provided with a movable plate matched with the fixed plate. Wherein, a displacement sensor 380 is arranged between the fixed plate and the movable plate for collecting and monitoring linear displacement.
In addition, in order to prevent the piston rod from rotating along the axis with respect to the linear loading cylinder, a guide mechanism is provided between the fixed plate and the movable plate, and the guide mechanism includes a guide rod 390 fixedly connected with the fixed plate and a guide sleeve provided on the movable plate.
In conclusion, the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A bearing axial test mechanism at least comprises a test unit (100), a swing component (200) acting on one side of the test unit and an axial loading component (300) acting on the other side of the test unit, and is characterized in that the test unit (100) at least comprises:
a table (110);
the pair of inner ring follow-up assemblies (120) are oppositely arranged and fixed on the workbench, each inner ring follow-up assembly at least comprises a bearing seat (121) and a support shaft (122) arranged in the bearing seat, the bearing seats are fixed on the workbench, a pair of inner ring flange-free cylindrical roller bearings (123) which are arranged side by side are arranged between the support shafts and the bearing seats, outer rings of the inner ring flange-free cylindrical roller bearings are fixedly arranged relative to the bearing seats, and inner rings of the inner ring flange-free cylindrical roller bearings are fixedly connected to the support shafts;
the bearing test tool (130) at least comprises a test shaft assembly (131) and an outer ring fixing assembly (132), two ends of the test shaft assembly are respectively connected with the support shafts of the pair of inner ring follow-up assemblies,
the support shaft (122) at least comprises a bearing connecting section (1221), a convex ring (1225) arranged at one end of the bearing connecting section and a support connecting part positioned at one side of the convex ring far away from the bearing connecting section,
the supporting connection part comprises a fixed support part (1222) and a movable support part (1223) which are matched and buckled with each other, a supporting shaft hole is arranged in the supporting connection part, a first key groove (1224) extending along the axial direction is arranged on the inner wall of the supporting shaft hole, a clamping groove (1227) is arranged in the supporting shaft hole and close to the bottom of the hole,
the test shaft assembly at least comprises:
a test shaft (1310) for passing through an inner race of a bearing under test;
the loading ferrules (1320), a pair of the loading ferrules are respectively sleeved on the test shafts at two sides of the outer ring loading seat, one end of each loading ferrule is provided with an inner ring contact end, and a swing angle transmission structure is arranged between each loading ferrule and each test shaft;
and the locking piece is fixedly arranged at the free end of the test shaft and is used for fixing the loading ferrule between the locking piece and the outer ring loading seat.
2. The axial bearing test mechanism of claim 1, wherein a flange end cover (126) is provided at an end of the support shaft remote from the support connection portion, and an inner ring of the inner ring non-flange type cylindrical roller bearing is fixed between the flange end cover and the convex ring.
3. The bearing axial test mechanism according to claim 1, wherein the test shaft at least comprises a test shaft section, a swing angle transmission section arranged on two sides of the test shaft section and a locking section connected with the swing angle transmission section; the cross section of the swing angle transmission section is a polygon, and the diameter of an outer tangent ring of the polygon is not more than that of the test shaft section; and a test shaft mounting hole matched with the test shaft section and a swing angle transmission hole matched with the swing angle transmission section are formed in the loading ferrule.
4. The axial bearing test mechanism of claim 3, wherein the outer ring of the loading ring is provided with a pair of flanges adjacent to the ends of the two ends, an axial loading slot is formed between the pair of flanges, and the portion between the wall of the retaining slot in the support shaft hole and the end of the support connecting part is matched with the axial loading slot.
5. The axial bearing test mechanism of claim 3, wherein the groove bottom of the axial loading groove is provided with a second key groove (1325) matched with the first key groove, and the first key groove and the second key groove are connected through a flat key (1330).
6. Bearing axial test mechanism according to any of claims 1 to 5, characterized in that said oscillating assembly (200) comprises at least:
the swing supporting seat (210) is fixedly arranged;
the device comprises an axial loading shaft (220), wherein one end of the axial loading shaft is provided with a swinging loading flange (222) connected with the supporting shaft, and the other end of the axial loading shaft is provided with a spline shaft (221);
the spline sleeve (223) is axially and movably connected with the spline shaft;
the spline sleeve is fixedly connected with the spline connecting shaft, and the spline connecting shaft is rotatably and movably connected with the swing supporting seat;
the swing cylinder (240) is fixedly connected to one side, far away from the axial loading shaft, of the swing support seat, and a torque sensor (230) is arranged between an output shaft of the swing cylinder and the spline connecting shaft;
and the encoder assembly (250) is arranged at one end, far away from the swing supporting seat, of the swing cylinder.
7. Bearing axial test mechanism according to any of claims 1 to 5, characterized in that said axial loading assembly (300) comprises at least:
a load support (310) fixedly disposed;
the linear loading cylinder (320) is fixedly connected with the loading supporting seat;
the piston rod (330) is axially and movably connected with the linear loading cylinder body;
the guide shaft (360) is axially and movably connected with the loading support seat and is positioned on one side of the loading support seat, which is far away from the linear loading cylinder body;
a pull pressure sensor (340) disposed between the piston rod and the guide shaft;
and one end of the linear loading rod (350) is rotatably and movably connected with the guide shaft, and a linear loading flange (351) connected with the supporting shaft is arranged at the free end of the linear loading rod.
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| CN112834219B (en) * | 2021-04-07 | 2023-05-09 | 中浙高铁轴承有限公司 | Loading tool assembly for bearing testing machine and method for loading test bearings |
| CN113405796B (en) * | 2021-06-30 | 2022-04-12 | 人本股份有限公司 | Auxiliary tool for detecting cylindrical roller bearing |
| CN115628908B (en) * | 2022-12-20 | 2023-05-16 | 哈尔滨船舶锅炉涡轮机研究所(中国船舶集团有限公司第七0三研究所) | Tool for bearing load detection |
| CN117705449B (en) * | 2024-02-06 | 2024-04-26 | 聊城大学 | Centripetal knuckle bearing wear life test system and test method |
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