CN112924148A - Electromagnetic brake fatigue test device - Google Patents
Electromagnetic brake fatigue test device Download PDFInfo
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- CN112924148A CN112924148A CN202110154398.4A CN202110154398A CN112924148A CN 112924148 A CN112924148 A CN 112924148A CN 202110154398 A CN202110154398 A CN 202110154398A CN 112924148 A CN112924148 A CN 112924148A
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- flywheel
- detachable
- transmission shaft
- electromagnetic brake
- push ring
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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
- G01M13/00—Testing of machine parts
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides an electromagnetic brake fatigue test device which comprises a transmission shaft, a sleeve, an electromagnetic brake connected with the transmission shaft and a power assembly connected with the transmission shaft through a clutch, wherein a detachable flywheel is sleeved on the sleeve; the main flywheel is provided with arc sheets matched with the arc holes, and the end faces of the arc sheets are provided with rotating wheels; the detachable flywheel is pushed to the main flywheel through the driving mechanism, the rotating wheel on the main flywheel contacts the slope surface, and the arc-shaped piece is accurately inserted into the arc-shaped hole, so that the mass of the flywheel is increased; meanwhile, the ball bearing on the driving mechanism presses the detachable flywheel on the main flywheel; the mass of the flywheel structure can be conveniently adjusted through the structure, so that the braking effect of the electromagnetic brake under different torque conditions can be simulated, and the data of the fatigue test is more accurate.
Description
Technical Field
The invention relates to the field of brake testing equipment, in particular to an electromagnetic brake fatigue testing device.
Background
The electromagnetic brake is a connector for transmitting the torque force of the driving side to the driven side, can be freely combined, separated or braked according to requirements, and has the advantages of compact structure, simplicity in operation, sensitivity in response, long service life, reliability in use, easiness in realizing remote control and the like.
Chinese patent application No. 201610750475.1 discloses an electromagnetic brake fatigue test device, through the rotation of motor drive transmission shaft, be connected with electromagnetic brake on the transmission shaft, still be equipped with flywheel and torque sensor on the transmission shaft simultaneously, simulate the load of transmission shaft in-process through the flywheel, and then electromagnetic sensor can appear skidding under big moment of torsion in the test, and then simulate electromagnetic brake's antifatigue ability under service environment.
The experimental model provides a better test model for the fatigue test of the electromagnetic brake, however, in the practical use process of the electromagnetic brake, if the electromagnetic brake is installed on an automobile, the torque transmitted to the transmission shaft by the automobile under different loading conditions is diversified, and obviously, the practical working scene of the electromagnetic brake cannot be well simulated through a group of flywheels with unchanged quality.
Disclosure of Invention
In view of the problems mentioned in the background art, the invention provides a fatigue testing device for an electromagnetic brake with an adjustable flywheel mass.
The embodiment of the invention is realized by the following technical scheme:
a fatigue test device for an electromagnetic brake comprises a transmission shaft, the electromagnetic brake connected with the transmission shaft and a power assembly connected with the transmission shaft through a clutch, wherein a main flywheel is further arranged on the transmission shaft;
the electromagnetic brake fatigue test device also comprises a sleeve supported by the supporting legs, wherein the inner diameter of the sleeve is larger than the outer diameter of the transmission shaft, the sleeve is sleeved on the transmission shaft, and a plurality of detachable flywheels are sleeved on the sleeve; each group of detachable flywheels comprises a detachable flywheel body and first protruding parts arranged on the central surfaces of two sides of the detachable flywheel body, and a plurality of arc-shaped holes are formed in the first protruding parts in a penetrating mode and surround the central axis of the detachable flywheel body;
the detachable flywheels are provided with a first side and a second side which are opposite, on the surface of the first side, facing the main flywheel, of each group of detachable flywheels, every two adjacent groups of arc-shaped holes are connected through a connecting groove, each connecting groove comprises a top and slope surfaces arranged on two sides of the top, and the tail ends of the slope surfaces of each group are connected with the arc-shaped holes on the same side;
the surface of one side of the main flywheel, which faces the detachable flywheel, is provided with a plurality of arc-shaped sheets matched with a plurality of arc-shaped holes in the detachable flywheel, and the end surface of each group of arc-shaped sheets is also provided with a rotating wheel which can be in rolling contact with a slope surface; a driving mechanism is further arranged in the electromagnetic brake fatigue test device to jack the detachable flywheel into the main flywheel; the surface of the driving mechanism which is contacted with the detachable flywheel is also provided with a plurality of balls.
In some preferred embodiments, the driving mechanism includes a screw pair and a push ring, wherein the screw of the screw pair is disposed parallel to the transmission shaft and is used for driving a first slide block on the screw to reciprocate along the axial direction of the transmission shaft, and the push ring is connected with the first slide block;
the push ring is sleeved on the transmission shaft, and a plurality of hooks are arranged on the push ring in a surrounding manner; the first end of the hook is rotatably connected with the push ring, a torsional spring is further arranged between each group of hooks and the push ring and used for pushing the second end of each hook to swing towards the second side of the detachable flywheel, and a stop block is further arranged on one side of the back face of each hook on the push ring, so that when the hook is in the maximum swing amplitude, the second end of each hook points to the circle center of the push ring;
the outer diameter of the push ring is larger than that of the detachable flywheel, and when the push ring is sleeved on the detachable flywheel, the second end of the hook slightly passes through the detachable flywheel and is clamped on the second side of the detachable flywheel; the balls are arranged on the surface of one side, facing the detachable flywheel, of the hook.
In some preferred embodiments, the electromagnetic brake fatigue testing device further comprises a side plate vertically arranged on one side of the transmission shaft, and the screw pair is arranged on the side plate; the side plates are also provided with two groups of guide rails which are parallel to the screw rod, and the two groups of guide rails are respectively arranged on the upper side and the lower side of the screw rod;
and the two groups of guide rails are respectively connected with a group of second sliding blocks in a sliding manner, the upper end and the lower end of the push ring are respectively provided with a group of connecting frames, and the two groups of second sliding blocks are respectively connected with a group of connecting frames on the same side.
In some preferred embodiments, the runner is supported on either side of the end face of the arcuate blade by an upright.
In some preferred embodiments, the powertrain includes an electric motor, and an output end of the electric motor is connected to a first end of a clutch through a coupling, and a second end of the clutch is connected to the transmission shaft.
In some preferred embodiments, the thickness of the hook is less than the sum of the thicknesses of the two sets of first raised portions, and the first raised portions and the second raised portions are equal in thickness.
In some preferred embodiments, the center of the main flywheel is provided with an enlarged shaft with a diameter larger than that of the transmission shaft, and the inner diameter of the through hole in the middle of the detachable flywheel is matched with the outer diameter of the enlarged shaft.
In some preferred embodiments, the push ring is provided with an extension plate extending along the axial direction of the push ring, and the hook is hinged on the extension plate.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
in the fatigue test device for the electromagnetic brake, the detachable flywheel is sleeved on the sleeve, the sleeve is sleeved on the transmission shaft, the arc-shaped holes are formed in the end face of the detachable flywheel in a surrounding mode, and two adjacent groups of arc-shaped holes in the surface of one side, facing the main flywheel, are connected through slope faces; the main flywheel is provided with arc sheets matched with the arc holes, and the end faces of the arc sheets are provided with rotating wheels;
the detachable flywheel is pushed to the main flywheel through the driving mechanism, and the rotating wheel on the main flywheel contacts with the slope surface, so that the detachable flywheel rotates, the arc-shaped piece is accurately inserted into the arc-shaped hole, the main flywheel is connected with the detachable flywheel, and the mass of the flywheel is increased; meanwhile, the driving mechanism is provided with balls which are rotationally connected with the surface of the detachable flywheel, so that the detachable flywheel can be pressed on the main flywheel without influencing the rotation of the detachable flywheel.
The mass of the flywheel structure can be conveniently adjusted through the structure, so that the braking effect of the electromagnetic brake under different torque conditions can be simulated, and the data of the fatigue test is more accurate.
Drawings
FIG. 1 is a schematic structural diagram of an electromagnetic brake fatigue testing device of the present invention;
FIG. 2 is a side view of a push ring of the fatigue testing apparatus for an electromagnetic brake of the present invention;
FIG. 3 is a schematic diagram of a flywheel mechanism structure of the fatigue testing device of the electromagnetic brake of the present invention;
FIG. 4 is a schematic structural view of a detachable flywheel of the fatigue testing device for an electromagnetic brake of the present invention;
FIG. 5 is an enlarged view of portion A of FIG. 1;
icon: 1-a motor, 10-a coupler, 2-a clutch, 3-a transmission shaft, 30-a transmission shaft body, 31-a bearing seat, 4-a detachable flywheel, 40-a detachable flywheel body, 41-a first bulge, 42-a through hole, 43-an arc hole, 44-a connecting groove, 440-a top, 441-a slope surface, 5-a main flywheel, 50-a main flywheel body, 51-a second bulge, 52-an expanding shaft, 53-an arc piece, 54-a rotating wheel, 540-an upright post, 6-an electromagnetic brake, 7-a supporting leg, 70-a sleeve, 8-a side plate, 80-a guide rail, 81-a lead screw pair, 810-a first sliding block, 9-a push ring, 90-an extending plate, 900-a stop block and 901-a hook, 902-ball, 91-link, 910-second slider.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Referring to fig. 1 to 5, the fatigue test device for the electromagnetic brake 6 comprises a transmission shaft 3, the electromagnetic brake 6 connected with the transmission shaft 3, and a power assembly connected with the transmission shaft 3 through a clutch 2, wherein a main flywheel 5 is further arranged on the transmission shaft 3.
Specifically, in the structural schematic diagram of the fatigue test device for the electromagnetic brake 6 shown in fig. 1, a motor 1, a coupler 10 arranged on an output shaft of the motor 1, and a transmission shaft 3 connected with the coupler 10 are sequentially arranged from left to right, and a clutch 2, a flywheel structure and the electromagnetic brake 6 are arranged on the transmission shaft 3; the power assembly comprises the motor 1, wherein the output end of the motor 1 is connected with the first end of the clutch 2 through the coupler 10, and the second end of the clutch 2 is connected with the transmission shaft 3.
The clutch 2 is used for cutting off the power of the transmission shaft 3 in a running state, so that the transmission shaft 3 is braked by the electromagnetic brake 6; the transmission shaft 3 comprises a transmission shaft body 30 and bearing seats 31 arranged at two ends of the transmission shaft body 30 and used for supporting the transmission shaft body 30 on the test bed;
the fatigue test device for the electromagnetic brake 6 further comprises a sleeve 70 supported by the supporting legs 7, the supporting legs 7 are installed on the test bed, the inner diameter of the sleeve 70 is larger than the outer diameter of the transmission shaft 3, and the sleeve 70 is coaxially sleeved on the transmission shaft 3, so that the inner wall of the sleeve 70 is not in contact with the transmission shaft 3.
The sleeve 70 is sleeved with a plurality of detachable flywheels 4, the two groups of detachable flywheels 4 are arranged in the embodiment, the mass of each detachable flywheel 4 can be set according to actual requirements, a through hole 42 is formed in the center of each detachable flywheel 4, and the inner diameter of each through hole 42 is matched with the outer diameter of the sleeve 70.
With reference to fig. 3 and 4, the detachable flywheel 4 has opposite first and second sides, defining the side facing the main flywheel 5 as the first side of the detachable flywheel 4; every removable flywheel 4 of group all includes removable flywheel 4 body and locates the first bellying 41 on the removable flywheel 4 body both sides central surface, and first bellying 41 is the cake form protruding structure that the axis that encircles the removable flywheel 4 body set up, runs through on the first bellying 41 around the axis of removable flywheel 4 body and is provided with a plurality of arc holes 43, is 6 arc holes 43 of group in this embodiment.
Referring to fig. 4, every two adjacent sets of arc-shaped holes 43 on the first side surface of each set of detachable flywheel 4 are connected by a connecting groove 44, the connecting groove 44 includes a top portion 440 and slope surfaces 441 disposed on two sides of the top portion 440, the ends of each set of slope surfaces 441 are respectively connected with the arc-shaped holes 43 on the same side, and 6 sets of arc-shaped holes 43 and the connecting groove 44 are connected into a whole ring on the first side surface of the detachable flywheel 4.
Referring to fig. 3, the main flywheel 5 includes a main flywheel 5 body and a second protruding portion 51 protruding from the middle of the main flywheel 5 body, the second protruding portion 51 is in a shape of a circular cake, a plurality of arc-shaped pieces 53 matching with the plurality of arc-shaped holes 43 on the detachable flywheel 4 are arranged on a side surface of the second protruding portion 51 facing the detachable flywheel 4, in this embodiment, 6 groups are provided, and a rotating wheel 54 capable of rolling-contacting with the slope surface 441 is further arranged on an end surface of each group of arc-shaped pieces 53; specifically, the runner 54 is supported on either side of the end surface of the arc-shaped piece 53 by a post 540.
The center of the main flywheel 5 is provided with an enlarged shaft 52 with the diameter larger than that of the transmission shaft body 30, and the inner diameter of the through hole 42 in the middle of the detachable flywheel 4 is matched with the outer diameter of the enlarged shaft 52.
A driving mechanism is further arranged in the fatigue test device of the electromagnetic brake 6 so as to jack the detachable flywheel 4 into the main flywheel 5; and the surface of the driving mechanism which is in contact with the detachable flywheel 4 is also provided with a plurality of balls 902.
When the transmission shaft 3 is static, the driving mechanism pushes a group of detachable flywheels 4 to move towards the main flywheel 5, and when the rotating wheel 54 contacts with any side slope of the connecting groove 44, the detachable flywheels 4 slip, so that the detachable flywheels 4 rotate to a certain extent and are finally sleeved on the arc-shaped sheets 53 of the main flywheel 5; the detachable flywheel 4 is tightly pressed on the main flywheel 5 through the driving mechanism, so that the generation of gaps is reduced, and meanwhile, the following rotation of the detachable flywheel 4 when the transmission shaft 3 rotates is not influenced by the existence of the ball 902.
Because the fatigue test device of the electromagnetic brake 6 is also internally provided with a torque sensor on the transmission shaft 3 for testing torque, the rolling friction between the ball 902 and the detachable flywheel 4 does not influence the testing precision.
As for a specific form of the driving mechanism, referring to fig. 1, fig. 2 and fig. 5, the driving mechanism includes a screw pair 81 and a push ring 9, wherein a screw of the screw pair 81 is disposed parallel to the transmission shaft 3 for driving a first slider 810 on the screw to reciprocate along an axial direction of the transmission shaft 3, and the push ring 9 is connected to the first slider 810;
the push ring 9 is sleeved on the transmission shaft 3, the axis of the push ring 9 is collinear with the axis of the transmission shaft 3, a plurality of hooks 901 are further arranged on the push ring 9 in a surrounding manner, 4 groups of hooks 901 are provided in this embodiment, the first end of each group of hooks 901 is rotatably connected with the push ring 9, a torsion spring is further arranged between each group of hooks 901 and the push ring 9 for pushing the second end of the hook 901 to swing towards the second side of the detachable flywheel 4, and a stopper 900 is further arranged on one side of the back of the hook 901 on the push ring 9, so that when the hook 901 is at the maximum swing amplitude, the second end of the hook 901 points to the center of the push ring 9;
referring to fig. 5, the outer diameter of the push ring 9 is larger than the outer diameter of the detachable flywheel 4, when the push ring 9 is sleeved on the detachable flywheel 4, firstly, the hook 901 swings under the extrusion of the outer circumferential surface of the detachable flywheel 4, an included angle between the hook 901 and the push ring 9 is reduced, when the hook 901 crosses the outer circumferential surface of the detachable flywheel 4, the hook 901 resets under the action of a torsion spring, the hook is clamped into the second side surface of the body of the detachable flywheel 4, the driving mechanism moves towards the main flywheel 5 again, and the detachable flywheel 4 is brought into the main flywheel 5.
Referring to fig. 1 and 5, specifically, a side plate 8 is further vertically arranged on one side of the transmission shaft 3, and the screw pair 81 is arranged on the side plate 8; two groups of guide rails 80 are arranged on the side plates 8 and are parallel to the screw rod, and the two groups of guide rails 80 are respectively arranged on the upper side and the lower side of the screw rod; each of the two sets of guide rails 80 is slidably connected with a set of second sliding blocks 910, each of the upper and lower ends of the push ring 9 is provided with a set of connecting frames 91, and each of the two sets of second sliding blocks 910 is connected with a set of connecting frames 91 on the same side.
The left and right movement of the push ring 9 can be driven by controlling the screw pair 81, and when the push ring 9 moves to the left side and the hook 901 is clamped into the detachable flywheel 4, the push ring 9 can be driven to move to the right to install the detachable flywheel 4 on the main flywheel 5; when the detachable flywheel 4 is detached, the push ring 9 is only required to be retracted leftwards, and then the detachable flywheel 4 is manually pushed back.
In addition, in some preferred embodiments, the thickness of the hook 901 is less than the sum of the thicknesses of the two sets of first protrusions 41, and the thicknesses of the first protrusions 41 and the second protrusions 51 are equal.
In addition, in some preferred embodiments, the push ring 9 is provided with an extension plate 90 extending along the axial direction of the push ring 9, and the hook 901 is hinged on the extension plate 90.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an electromagnetic brake fatigue test device, includes transmission shaft (3), electromagnetic brake (6) be connected with transmission shaft (3) and with transmission shaft (3) between the power assembly who is connected through clutch (2), still be equipped with main flywheel (5), its characterized in that on transmission shaft (3):
the flywheel transmission device is characterized by further comprising a sleeve (70) supported by the supporting legs (7), wherein the inner diameter of the sleeve (70) is larger than the outer diameter of the transmission shaft (3), the sleeve (70) is sleeved on the transmission shaft (3), and a plurality of detachable flywheels (4) are sleeved on the sleeve (70); each group of detachable flywheels (4) comprises a detachable flywheel body (40) and first protruding parts (41) arranged on the central surfaces of the two sides of the detachable flywheel body (40), and a plurality of arc-shaped holes (43) penetrate through the central axes of the detachable flywheel body (40) on the first protruding parts (41);
the detachable flywheel (4) is provided with a first side and a second side which are opposite, on the surface of the first side, facing the main flywheel (5), of each group of detachable flywheels (4), every two adjacent groups of arc-shaped holes (43) are connected through a connecting groove (44), each connecting groove (44) comprises a top (440) and slope surfaces (441) arranged on two sides of the top (440), and the tail ends of the slope surfaces (441) of each group are connected with the arc-shaped holes (43) on the same side;
the surface of one side, facing the detachable flywheel (4), of the main flywheel (5) is provided with a plurality of arc-shaped sheets (53) matched with a plurality of arc-shaped holes (43) in the detachable flywheel (4), and the end face of each group of arc-shaped sheets (53) is also provided with a rotating wheel (54) capable of rolling and contacting with the slope surface (441); a driving mechanism is further arranged in the electromagnetic brake fatigue test device to jack the detachable flywheel (4) into the main flywheel (5); the surface of the driving mechanism which is contacted with the detachable flywheel (4) is also provided with a plurality of balls (902).
2. The electromagnetic brake fatigue testing apparatus of claim 1, characterized in that: the driving mechanism comprises a screw pair (81) and a push ring (9), wherein a screw of the screw pair (81) is arranged in parallel to the transmission shaft (3) and used for driving a first sliding block (810) on the screw to reciprocate along the axial direction of the transmission shaft (3), and the push ring (9) is connected with the first sliding block (810);
the push ring (9) is sleeved on the transmission shaft (3), and a plurality of hooks (901) are arranged on the push ring (9) in a surrounding manner; the first end of the hook (901) is rotatably connected with the push ring (9), a torsion spring is further arranged between each group of hooks (901) and the push ring (9) and used for pushing the second end of each hook (901) to swing towards the second side of the detachable flywheel (4), and a stop block (900) is further arranged on one side of the back of each hook (901) on the push ring (9), so that when the hook (901) is in the maximum swing amplitude, the second end of each hook (901) points to the circle center of the push ring (9);
the outer diameter of the push ring (9) is larger than that of the detachable flywheel (4), and when the push ring (9) is sleeved on the detachable flywheel (4), the second end of the hook (901) slightly passes behind the detachable flywheel (4) and is clamped on the second side of the detachable flywheel (4); the balls (902) are arranged on the surface of one side, facing the detachable flywheel (4), of the hook (901).
3. The electromagnetic brake fatigue testing apparatus of claim 2, characterized in that: the fatigue test device for the electromagnetic brake further comprises a side plate (8) vertically arranged on one side of the transmission shaft (3), and the screw pair (81) is arranged on the side plate (8); two groups of guide rails (80) which are parallel to the screw rod are arranged on the side plate (8), and the two groups of guide rails (80) are respectively arranged on the upper side and the lower side of the screw rod;
each sliding connection has a set of second slider (910) on two sets of guide rails (80), both ends respectively are equipped with a set of link (91) about push ring (9), two sets of second slider (910) slider respectively with a set of link (91) of homonymy link to each other.
4. The electromagnetic brake fatigue testing apparatus of claim 1, characterized in that: the rotating wheel (54) is supported on any side of the end face of the arc-shaped sheet (53) through an upright post (540).
5. The electromagnetic brake fatigue testing apparatus of claim 1, characterized in that: the power assembly comprises a motor (1), the output end of the motor (1) is connected with the first end of the clutch (2) through a coupler (10), and the second end of the clutch (2) is connected with the transmission shaft (3).
6. The electromagnetic brake fatigue testing apparatus of claim 2, characterized in that: the thickness of the hook (901) is smaller than the sum of the thicknesses of the two groups of first bulges (41), and the thicknesses of the first bulges (41) and the second bulges (51) are equal.
7. The electromagnetic brake fatigue testing apparatus of claim 1, characterized in that: the center of the main flywheel (5) is provided with an enlarged shaft (52) with the diameter larger than that of the transmission shaft (3), and the inner diameter of the through hole (42) in the middle of the detachable flywheel (4) is matched with the outer diameter of the enlarged shaft (52).
8. The electromagnetic brake fatigue testing apparatus of claim 2, characterized in that: the push ring (9) is provided with an extension plate (90) extending along the axial direction of the push ring (9), and the hook (901) is hinged on the extension plate (90).
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| CN202110154398.4A CN112924148B (en) | 2021-02-04 | 2021-02-04 | Electromagnetic brake fatigue test device |
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|---|---|---|---|
| CN202110154398.4A CN112924148B (en) | 2021-02-04 | 2021-02-04 | Electromagnetic brake fatigue test device |
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| CN112924148A true CN112924148A (en) | 2021-06-08 |
| CN112924148B CN112924148B (en) | 2023-09-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118603593A (en) * | 2024-07-03 | 2024-09-06 | 湖南工业职业技术学院 | A braking performance detection device for automobile brakes |
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