CN210400852U - Triaxial elastic bearing bush fatigue testing machine - Google Patents
Triaxial elastic bearing bush fatigue testing machine Download PDFInfo
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- CN210400852U CN210400852U CN201921744801.3U CN201921744801U CN210400852U CN 210400852 U CN210400852 U CN 210400852U CN 201921744801 U CN201921744801 U CN 201921744801U CN 210400852 U CN210400852 U CN 210400852U
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- elastic bearing
- bearing bush
- loading unit
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Abstract
The utility model discloses a triaxial elastic bearing bush fatigue testing machine. The test device comprises a test unit, wherein the test unit comprises a clamping assembly and two jacking assemblies, the clamping assembly is used for fixing an outer ring of an elastic bearing bush, and the two jacking assemblies are symmetrically arranged on two sides of the elastic bearing bush and used for fixing an inner ring of the elastic bearing bush; the first loading unit is connected with the clamping assembly, a sliding assembly is arranged below the clamping assembly, and the first loading unit drives the clamping assembly to linearly reciprocate along the sliding assembly; the second loading unit is perpendicular to the first loading unit and connected to the clamping assembly, and the second loading unit drives the clamping assembly to twist around a vertical radial center line of the elastic bearing bush; and the third loading unit is connected with the jacking assembly and drives the jacking assembly to twist around the central shaft of the elastic bearing bush. The utility model is used for simulate the fatigue life of elastic bearing bush under the effect of the power that receives three direction.
Description
Technical Field
The utility model relates to an auto parts detects technical field, especially relates to a triaxial elastic bearing bush fatigue testing machine.
Background
The elastic bearing bush is used for a lower control arm and a wheel support of an automobile, the structure of the elastic bearing bush is an outer steel bushing and an inner steel bushing, the middle of the elastic bearing bush is a rubber bush, the rubber bush and a metal sleeve are glued and bonded together and are subjected to high-temperature interference press fit, and a suspension bush of a passenger car can reduce impact and vibration transmitted to an automobile body, and meanwhile, the control stability of the automobile and the elastic kinematics characteristic of the suspension are guaranteed.
The suspension part bushing is greatly influenced by two-directional forces, such as a front lower control arm front and rear bushing, a rear cross-pull rod bushing and the like. However, some bushings are similar to torsion beam bushings, rear trailing arm bushings and the like, are greatly influenced by forces in three directions, if the bushings are not completely examined only in radial direction and torsion in a bench test, the axial stress of the bushings cannot be simulated well, and the fatigue life of the bushings on a vehicle cannot be examined really. For the different requirements, different actuating cylinders (a torsion cylinder and a linear cylinder) can realize the condition of the torsion function, so that a triaxial elastic bearing bush fatigue testing machine which can freely switch modes according to the actuating cylinder resources and the testing requirements is required to be designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a triaxial elastic bearing bush fatigue testing machine for simulation elastic bearing bush is at the fatigue life who receives the effect under the power of three direction.
To achieve the purpose, the utility model adopts the following technical proposal:
provided is a triaxial elastic bearing bush fatigue testing machine, including:
the test unit comprises a clamping assembly and two tightening assemblies, the clamping assembly is used for fixing the outer ring of the elastic bearing bush, and the two tightening assemblies are symmetrically arranged on two sides of the elastic bearing bush and used for fixing the inner ring of the elastic bearing bush;
the first loading unit is connected with the clamping assembly, a sliding assembly is arranged below the clamping assembly, and the first loading unit drives the clamping assembly to linearly reciprocate along the sliding assembly;
the second loading unit is perpendicular to the first loading unit and connected to the clamping assembly, and the second loading unit drives the clamping assembly to twist around a vertical radial center line of the elastic bearing bush;
and the third loading unit is connected to the jacking assembly and drives the jacking assembly to twist around the central shaft of the elastic bearing bush.
Preferably, the clamping assembly comprises a support connected to the first loading unit, and a locking assembly provided on the support, the locking assembly being rotatable relative to the support about a vertical radial centre line of the resilient bearing bush.
Preferably, a rotating shaft is arranged on the locking assembly, a first rotating bearing matched with the rotating shaft is arranged on the support, and the rotating shaft is arranged along the vertical direction.
Preferably, the locking assembly comprises:
the first retaining member and the second retaining member, the internal diameter of first retaining member with the second retaining member all with the external diameter fit of general bush, general bush with the outer lane interference fit of elastic bearing bush.
Preferably, the sliding assembly comprises a guide rail bottom plate, a linear guide rail arranged on the guide rail bottom plate, and a sliding block matched with the linear guide rail to slide, and the support is connected to the sliding block.
Preferably, the fatigue testing machine for the three-axial elastic bearing bush further comprises a fixed plate, the jacking assembly comprises two supporting seats arranged on the fixed plate, a transmission shaft and a jacking head, the two supporting seats are arranged at a preset distance, and the transmission shaft is rotatably connected with the supporting seats through a second rotating bearing;
the puller is arranged at one end of the transmission shaft and used for pulling the inner ring of the elastic bearing bush tightly.
Preferably, a retainer ring and an adjusting nut are respectively arranged on two sides of each second rotating bearing, and the adjusting nut is located between the two supporting seats.
Preferably, the first loading unit comprises a first loading rod and a first driving component for driving the first loading rod to move;
the second loading unit comprises a second loading rod and a second driving assembly for driving the second loading rod to move, and the first loading rod and the second loading rod are vertically arranged;
the third loading unit comprises a third loading rod and a third driving assembly for driving the third loading rod to move, and the third loading rod is connected to the jacking assembly;
the first driving assembly, the second driving assembly and the third driving assembly are all arranged on the fixing plate.
Preferably, triaxial elastic bearing bush fatigue testing machine still includes the rocking handle, the one end of rocking handle connect in the transmission shaft, the other end of rocking handle connect in the third load bar.
Preferably, the first driving assembly, the second driving assembly and the third driving assembly are all linear oil cylinders.
The utility model has the advantages that: in this embodiment, the outer ring of the elastic bearing bush is clamped by the clamping assembly, the inner ring of the elastic bearing bush is clamped by the jacking assembly, and the first loading unit drives the clamping assembly to linearly reciprocate along the sliding assembly through the guiding of the sliding assembly. Thereby simulating the working condition of the elastic bearing bush along the deviation of the elastic bearing bush from the central axis of the elastic bearing bush. The second loading unit drives the clamping assembly to twist by taking a vertical radial central line of the elastic bearing bush as a central shaft, and the second loading unit simulates the working condition of the twisting of the elastic bearing bush in the direction. The third loading unit drives the jacking assembly to twist around the central shaft of the elastic bearing bush, so that the twisting in the other direction of the elastic bearing bush is simulated. The working condition of the elastic bearing bush is simulated through the triaxial elastic bearing bush fatigue testing machine, so that the working condition of the elastic bearing bush is closer to the actual working condition for fatigue testing, and the result obtained after the fatigue testing is more accurate.
Drawings
FIG. 1 is a schematic structural view of a triaxial elastic bearing bushing fatigue testing machine of the present invention;
fig. 2 is a schematic structural view of the jacking assembly and the clamping assembly of the present invention;
fig. 3 is a schematic structural view of the clamping assembly of the present invention;
FIG. 4 is a schematic structural view of the clamping assembly and the tightening head of the present invention;
fig. 5 is an exploded view of the structure of the clamping assembly of the present invention;
FIG. 6 is a schematic structural view of the tightening assembly and the rocking handle of the present invention;
fig. 7 is a schematic view of the internal structure of the tightening assembly of the present invention.
In the figure:
1. a test unit;
11. a clamping assembly; 111. a support; 112. a locking assembly; 1121. a first locking member; 1122. a second locking member; 113. a rotating shaft; 114. a first rotating bearing; 115. a universal bushing;
12. jacking the assembly; 121. a supporting seat; 122. a drive shaft; 123. a retainer ring; 124. adjusting the nut; 125. a second rotary bearing; 126. tightly pushing the head; 127. locking the nut; 128. a support bar;
2. an elastic bearing bush;
3. a first loading unit; 31. a first loading lever; 32. a first drive assembly;
4. a sliding assembly; 41. a guide rail bottom plate; 42. a linear guide rail; 43. a slider;
5. a second loading unit; 51. a second loading lever; 52. a second drive assembly;
6. a third loading unit; 61. a third loading lever; 62. a third drive assembly;
7. a fixing plate;
8. a rocking handle.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the present embodiment provides a fatigue testing machine for a three-axial elastic bearing bush, which includes a fixing plate 7, a testing unit 1, a first loading unit 3, a second loading unit 5, and a third loading unit 6, wherein each unit is disposed on the fixing plate 7. The test unit 1 comprises a clamping assembly 11 and two jacking assemblies 12, wherein the clamping assembly 11 is used for fixing the outer ring of the elastic bearing bush 2, and the two jacking assemblies 12 are symmetrically arranged on two sides of the elastic bearing bush 2 and used for fixing the inner ring of the elastic bearing bush 2.
And the second loading unit 5 is arranged perpendicular to the first loading unit 3, the second loading unit 5 is connected to the clamping assembly 11, and the second loading unit 5 drives the clamping assembly 11 to twist around the vertical radial center line of the elastic bearing bush 2.
And the third loading unit 6 is connected to the jacking assembly 12, and the third loading unit 6 drives the jacking assembly 12 to twist around the central shaft of the elastic bearing bush 2.
In this embodiment, the outer ring of the elastic bearing bush 2 is clamped by the clamping assembly 11, the inner ring of the elastic bearing bush 2 is clamped by the tightening assembly 12, and the first loading unit 3 drives the clamping assembly 11 to linearly reciprocate along the sliding assembly 4 through the guidance of the sliding assembly 4. Thereby simulating the condition of the elastic bearing bush 2 along its own offset central axis. The second loading rod 51 of the second loading unit 5 is perpendicular to the first loading rod 31, the second loading unit 5 drives the clamping assembly 11 to twist around the vertical radial center line of the elastic bearing bush 2, and the second loading unit 5 simulates the working condition of the twisting of the elastic bearing bush 2 in the direction. The third loading unit 6 drives the tightening unit 12 to twist around the central axis of the elastic bearing bush 2, thereby simulating the twisting of the elastic bearing bush 2 in the other direction. The working condition of the elastic bearing bush 2 is simulated through the triaxial elastic bearing bush fatigue testing machine, so that the working condition of the elastic bearing bush is closer to the actual working condition for fatigue testing, and the result obtained after the fatigue testing is more accurate.
Specifically, as shown in fig. 3 to 5, the clamping assembly 11 includes a support 111 connected to the first loading rod 31, the support 111 in this embodiment is a U-shaped support, and a locking assembly 112 disposed in the support 111 and capable of rotating relative to the support 111, wherein the locking assembly 112 is capable of rotating around a vertical radial center line of the elastic bearing bush 2.
As shown in fig. 3 and 4, the U-shaped bracket is disposed on the sliding assembly 4, the sliding assembly 4 includes a guide rail bottom plate 41, a linear guide rail 42 disposed on the guide rail bottom plate 41, and a sliding block 43 sliding in cooperation with the linear guide rail 42, and the U-shaped bracket is connected to the sliding block 43. When the first loading unit 3 drives the U-shaped support to do linear reciprocating motion, the guide is provided through the linear guide rail 42, so that the working condition that the elastic bearing bush 2 deflects after being subjected to a force vertical to the central axis can be simulated.
As shown in fig. 5, the locking assembly 112 is connected to the elastic bearing bush 2 through a universal bush 115, the universal bush 115 is sleeved on the outer ring of the elastic bearing bush 2 and is fixedly connected to the outer ring of the elastic bearing bush 2, so that the elastic bearing bush 2 and the universal bush 115 can integrally operate when different stress conditions of the elastic bearing bush 2 are simulated. The locking assembly 112 is sleeved on the universal bushing 115 and is fixedly connected with the universal bushing 115, and the locking assembly 112 and the universal bushing 115 can integrally move.
The locking assembly 112 is located in the U-shaped support, the locking assembly 112 is rotatably connected with the U-shaped support, specifically, the locking assembly 112 is provided with a rotating shaft 113 up and down, the rotating shaft 113 is connected with a first rotating bearing 114, the central axis of the first rotating bearing 114 coincides with the vertical radial central line of the universal bushing 115, and the locking assembly 112 can rotate around the central axis of the first rotating bearing 114 through the first rotating bearing 114.
The locking assembly 112 includes two first locking members 1121 and second locking members 1122, each having an inner diameter that mates with the outer diameter of the universal bushing 115. The first and second locking members 1121 and 1122 are engaged with each other to radially clamp the universal bush 115, and the elastic bearing bush 2 is installed in the universal bush 115 to clamp the elastic bearing bush 2 by the first and second locking members 1121 and 1122. The rotating shafts 113 are installed on the second locking member 1122, the two rotating shafts 113 are respectively located at the upper and lower ends of the second locking member 1122, and the rotating shafts 113 are overlapped with the vertical radial center line of the universal bushing 115.
As shown in fig. 1, the first driving assembly 32 in the first loading unit 3 is a first linear cylinder, an output end of the first linear cylinder is connected to a first loading rod 31, and the first loading rod 31 is connected to the U-shaped support.
The second loading unit 5 and the first loading unit 3 have similar structures, the second loading unit 5 includes a second loading rod 51 and a second driving assembly 52 for driving the second loading rod 51 to move, the second linear oil cylinder is perpendicular to the first linear oil cylinder, the second loading rod 51 is perpendicular to the first loading rod 31, and the first linear oil cylinder and the second linear oil cylinder are both disposed on the fixing plate 7. The second linear cylinder is connected to the second loading rod 51, the second loading rod 51 is connected to the second locking member 1122 of the locking assembly 112, and the second linear cylinder drives the locking assembly 112 to twist around the central axis of the first rotation bearing 114 through the second loading rod 51.
The third driving component 62 of the third loading unit 6 is a third linear oil cylinder, and the output end of the third linear oil cylinder drives the third loading rod 61 to be connected to the jacking component 12. The third loading unit 6 comprises a third loading rod 61 and a third driving assembly 62 for driving the third loading rod 61 to reciprocate linearly, the third loading rod 61 is parallel to the first loading rod 31 and is perpendicular to the second loading rod 51, the third loading rod 61 is connected to the jacking assembly 12, the jacking assembly 12 is provided with a rocking handle 8, the third loading rod 61 is connected to the rocking handle 8, and the jacking assembly 12 is driven by the rocking handle 8 to twist around the central shaft of the elastic bearing bush 2.
As shown in fig. 6 and 7, the tightening assembly 12 includes two supporting seats 121 disposed on the fixing plate 7, and the two supporting seats 121 are spaced apart by a predetermined distance. The transmission shaft 122 is inserted into the two support bases 121, and the transmission shaft 122 is rotatably connected with the two support bases 121 through the second rotating bearing 125.
One side of the two supporting seats 121 is provided with a retaining ring 123, the other side of the two supporting seats is sleeved with an adjusting nut 124 on the rotating shaft 113, and the adjusting nut 124 is arranged between the two supporting seats 121. The retainer rings 123 and the adjusting nuts 124 are respectively pressed against two ends of the second rotating bearing 125 to prevent the second rotating bearing 125 from moving axially. To further prevent the adjustment nut 124 from being loosened, a lock nut 127 is provided at one side of the adjustment nut 124, and the lock nut 127 is located between the two support seats 121.
The rocking handle 8 is arranged at one end of the transmission shaft 122, and the third loading rod 61 is eccentrically connected with the transmission shaft 122 through the rocking handle 8. The other end of the transmission shaft 122 is connected with a tightening head 126, the tightening head 126 is conical, as shown in fig. 7, a support rod 128 (as shown in fig. 4) is arranged at the center of the tightening head 126, and the support rod 128 penetrates through the elastic bearing bush 2 and is located at the center of the elastic bearing bush 2 for supporting the elastic bearing bush 2. Two ends of the support rod 128 are provided with tightening heads 126, and the tightening heads 126 are tightly pressed against the inner ring of the elastic bearing bush 2.
The retainer rings 123 and the adjusting nuts 124 are arranged on two sides of the second rotating bearing 125, so that the stability of the transmission shaft 122 of the driving shaft in the transmission process can be enhanced, and the transmission shaft 122 can be flexibly bent due to vibration generated by the fatigue testing machine during working in the structural transmission process.
In the embodiment, the first loading unit 3 drives the clamping assembly 11 to reciprocate linearly along the direction perpendicular to the central axis of the elastic bearing bush 2, so as to simulate the radial stress condition of the elastic bearing bush 2, and the second loading unit 5 drives the locking assembly 112 to twist around the vertical radial central line of the elastic bearing bush 2, so as to simulate the torque condition of the elastic bearing bush 2 around the vertical radial central axis. The third loading unit 6 drives the jacking assembly 12 to twist around the central shaft of the elastic bearing bush 2, and the working condition that the elastic bearing bush 2 is subjected to the twisting around the central shaft is simulated. By simulating the stress working conditions of the elastic bearing bush 2 in three directions, the stress of the elastic bearing bush 2 in the actual working state is closer, and the fatigue life of the elastic bearing bush 2 tested on a fatigue testing machine is more accurate.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. 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 claims of the present invention.
Claims (10)
1. The utility model provides a triaxial elastic bearing bush fatigue testing machine which characterized in that includes:
the test unit (1) comprises a clamping assembly (11) and two tightening assemblies (12), wherein the clamping assembly (11) is used for fixing the outer ring of the elastic bearing bush (2), and the two tightening assemblies (12) are symmetrically arranged on two sides of the elastic bearing bush (2) and used for fixing the inner ring of the elastic bearing bush (2);
the first loading unit (3) is connected to the clamping assembly (11), a sliding assembly (4) is arranged below the clamping assembly (11), and the first loading unit (3) drives the clamping assembly (11) to linearly reciprocate along the sliding assembly (4);
the second loading unit (5) is perpendicular to the first loading unit (3), the second loading unit (5) is connected to the clamping assembly (11), and the second loading unit (5) drives the clamping assembly (11) to twist around a vertical radial center line of the elastic bearing bush (2);
and the third loading unit (6) is connected to the jacking assembly (12), and the third loading unit (6) drives the jacking assembly (12) to twist around the central shaft of the elastic bearing bush (2).
2. The triaxial elastomeric bearing bushing fatigue testing machine of claim 1, wherein the clamping assembly (11) comprises a seat (111) connected to the first loading unit (3), and a locking assembly (112) provided on the seat (111), the locking assembly (112) being rotatable with respect to the seat (111) about a vertical radial centre line of the elastomeric bearing bushing (2).
3. The fatigue testing machine for the triaxial elastic bearing bushing according to claim 2, wherein the locking assembly (112) is provided with a rotating shaft (113), the support (111) is provided with a first rotating bearing (114) which is matched with the rotating shaft (113), and the rotating shaft (113) is arranged along a vertical direction.
4. The triaxial elastomeric bearing bushing fatigue testing machine of claim 2, wherein the locking assembly (112) comprises:
the locking device comprises a first locking piece (1121) and a second locking piece (1122), wherein the inner diameter of the first locking piece (1121) and the inner diameter of the second locking piece (1122) are matched with the outer diameter of a universal bushing (115), and the universal bushing (115) is in interference fit with the outer ring of the elastic bearing bushing (2).
5. The triaxial elastic bearing bushing fatigue testing machine according to claim 2, wherein the sliding assembly (4) comprises a guide rail base plate (41), a linear guide rail (42) arranged on the guide rail base plate (41), and a sliding block (43) which is matched with the linear guide rail (42) to slide, and the support (111) is connected to the sliding block (43).
6. The fatigue testing machine for the three-axial elastic bearing bushing according to claim 1, further comprising a fixing plate (7), wherein the tightening assembly (12) comprises two supporting seats (121) disposed on the fixing plate (7), a transmission shaft (122) and a tightening head (126), the two supporting seats (121) are disposed at a predetermined distance, and the transmission shaft (122) is rotatably connected to the supporting seats (121) via a second rotating bearing (125);
the puller head (126) is arranged at one end of the transmission shaft (122), and the puller head (126) is used for pulling the inner ring of the elastic bearing bush (2).
7. The fatigue testing machine for the three-axial elastic bearing bush according to claim 6, characterized in that a retainer ring (123) and an adjusting nut (124) are respectively arranged at two sides of each second rotating bearing (125), and the adjusting nut (124) is positioned between the two supporting seats (121).
8. The fatigue testing machine for the three-axial elastic bearing bush according to claim 6, characterized in that the first loading unit (3) comprises a first loading rod (31) and a first driving component (32) for driving the first loading rod (31) to move;
the second loading unit (5) comprises a second loading rod (51) and a second driving assembly (52) for driving the second loading rod (51) to move, and the first loading rod (31) and the second loading rod (51) are vertically arranged;
the third loading unit (6) comprises a third loading rod (61) and a third driving assembly (62) for driving the third loading rod (61) to move, and the third loading rod (61) is connected to the jacking assembly (12);
the first drive assembly (32), the second drive assembly (52) and the third drive assembly (62) are all arranged on the fixing plate (7).
9. The triaxial elastomeric bearing bushing fatigue testing machine of claim 8, further comprising a rocking handle (8), wherein one end of the rocking handle (8) is connected to the transmission shaft (122), and the other end of the rocking handle (8) is connected to the third loading rod (61).
10. The triaxial elastomeric bearing bushing fatigue testing machine of claim 8, wherein the first drive assembly (32), the second drive assembly (52), and the third drive assembly (62) are all linear cylinders.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921744801.3U CN210400852U (en) | 2019-10-17 | 2019-10-17 | Triaxial elastic bearing bush fatigue testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921744801.3U CN210400852U (en) | 2019-10-17 | 2019-10-17 | Triaxial elastic bearing bush fatigue testing machine |
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| CN210400852U true CN210400852U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553843A (en) * | 2019-10-17 | 2019-12-10 | 上海精智实业股份有限公司 | triaxial elastic bearing bush fatigue testing machine |
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2019
- 2019-10-17 CN CN201921744801.3U patent/CN210400852U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553843A (en) * | 2019-10-17 | 2019-12-10 | 上海精智实业股份有限公司 | triaxial elastic bearing bush fatigue testing machine |
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