CN114061885A - Linear drive device - Google Patents
Linear drive device Download PDFInfo
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- CN114061885A CN114061885A CN202111368160.8A CN202111368160A CN114061885A CN 114061885 A CN114061885 A CN 114061885A CN 202111368160 A CN202111368160 A CN 202111368160A CN 114061885 A CN114061885 A CN 114061885A
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- 241001669679 Eleotris Species 0.000 abstract description 3
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- 238000003825 pressing Methods 0.000 description 5
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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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
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
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Abstract
The application relates to the technical field of collision energy absorption tests of railway vehicles, in particular to a linear driving device. The linear driving device comprises a linear motor primary, a position adjusting assembly, a mounting table component and a clamping assembly; the mounting platform component is arranged on a mounting plane between the two sleepers, and two ends of the mounting platform component in the width direction are respectively connected with the two rails in a clamping manner through clamping components; the primary linear motor is movably connected to the mounting table component through the position adjusting component, and the position adjusting component can adjust the position of the primary linear motor relative to the mounting table component, so that the primary linear motor moves to a preset position, wherein a preset induction gap is formed between the primary linear motor and the induction plate on the test vehicle. This linear driving device does not destroy sleeper and track when the installation, is convenient for carry out high accuracy and batch regulation to linear electric motor elementary position, is convenient for accomodate linear electric motor elementary properly, extension linear electric motor elementary life.
Description
Technical Field
The application relates to the technical field of collision energy absorption tests of railway vehicles, in particular to a linear driving device.
Background
With the rapid development and the improvement of the running speed of rail transit, the rail transit is a preferred vehicle for people to go out, and the running safety problem of rail transit is always a focus of attention of people, so that the collision design and verification of rail vehicles are required.
The collision test is the most direct means for verifying the energy absorption system of the rail vehicle, and the collision test relates to the application of a linear motor to control the collision speed precision.
The basic requirement for installing the linear motor is that it is impossible to drill holes and other damages on the rails and sleepers, and for this reason, the conventional structure for connecting the linear motor to the rails generally clamps the lower edges of the left and right rails, respectively, and then connects the clamps on the left and right rails by means of tie rods.
The structure can only be used for keeping the left and right rail checking fixture, the linear motor is arranged on the pull rod, the position and the height of the linear motor cannot be adjusted, the position precision and the height precision of the linear motor cannot be ensured after the linear motor is arranged, and the uniformity of the installation precision of a plurality of linear motors cannot be ensured after the linear motor is arranged in batches.
Disclosure of Invention
The application aims to provide a linear driving device to solve the technical problems that in the process of performing a collision test on a test vehicle, the mounting position of a linear motor is not adjustable and the mounting precision is low in the prior art to a certain extent.
The application provides a linear driving device which is used for driving or braking a test vehicle on a track assembly, wherein the track assembly comprises a plurality of sleepers arranged side by side at intervals along the length direction of the track assembly and two tracks, and the two tracks are arranged at two ends of the track along the width direction of the track assembly;
the linear driving device comprises a linear motor primary, a position adjusting assembly, a mounting table component and a clamping assembly;
the mounting platform component is arranged on a mounting plane between the two sleepers, and two ends of the mounting platform component in the width direction are respectively connected with the two rails in a clamping manner through the clamping components;
the primary linear motor is movably connected to the mounting table component through the position adjusting component, and the position adjusting component can adjust the position of the primary linear motor relative to the mounting table component, so that the primary linear motor moves to a preset position where a preset induction gap is formed between the primary linear motor and an induction plate on the test vehicle.
In the above technical solution, further, the mounting table member includes a connecting portion and a table portion;
the platform part is in a flat plate shape and is used for being attached to the installation plane, and the position adjusting assembly is arranged on the top surface of the platform part;
the both ends of the width direction of platform portion are connected with respectively connecting portion, connecting portion for platform portion upwards extends, the centre gripping subassembly set up in connecting portion.
In any of the above technical solutions, further, the position adjusting assembly includes an attitude adjusting mechanism and a lifting adjusting mechanism;
the posture adjusting mechanism is arranged on the mounting table component through the lifting adjusting mechanism;
the two ends of the lifting adjusting mechanism in the height direction can be relatively close to or far away from each other so as to drive the posture adjusting mechanism and the linear motor primary to lift relative to the mounting table component.
In any of the above technical solutions, further, the lifting adjusting mechanism includes a top plate, a bottom plate, a retractable supporting member, and a lifting driving member;
the bottom plate is arranged on the mounting table component, the top plate is arranged at the top of the bottom plate at intervals, two ends of the telescopic supporting component in the height direction can be relatively telescopic and are respectively connected with the top plate and the bottom plate, and the lifting driving component can drive the top plate to lift relative to the bottom plate.
In any of the above technical solutions, further, the lifting driving member includes a worm, a worm wheel, and a third rotation driving member;
the top end of the worm is connected with the top plate, the bottom end of the worm movably penetrates through the bottom plate, and the worm wheel is meshed with the worm;
the third rotation driving component is connected with the worm wheel and can drive the worm wheel to rotate, so that the worm wheel drives the worm to drive the top plate to lift;
the telescopic supporting member is a lifting hinge frame, and the two ends of the top plate are connected with the two ends of the bottom plate through the lifting hinge frame in a one-to-one correspondence mode.
In any of the above technical solutions, further, the posture adjusting mechanism includes a fixed base, a first movable seat and a second movable seat;
the fixing base is arranged on the top plate, the first movable seat is pivoted to the fixing base around a first pivot axis, the second movable seat is pivoted to the first movable seat around a second pivot axis, and the first pivot axis and the second pivot axis are arranged in a crossed mode and are located in the same plane parallel to the track plane.
In any of the above technical solutions, further, the posture adjustment mechanism further includes a first rotation driving member, and the first rotation driving member is connected to the first movable seat to drive the first movable seat to rotate around the first pivot axis;
the posture adjusting mechanism further comprises a second rotation driving component, and the second rotation driving component is connected with the second movable seat to drive the second movable seat to rotate around the second pivot axis.
In any of the above technical solutions, further, the position adjusting assembly further includes a rotating connection mechanism, and the rotating connection mechanism includes a first rotating portion and a second rotating portion;
the first rotating part is connected with the first movable seat so as to enable the first rotating part to synchronously rotate along with the first movable seat;
the second rotating part is supported at the bottom of the primary winding of the linear motor, the second rotating part is pivoted to the first rotating part around a third pivot axis, the second rotating part is connected with the second movable seat, and the third pivot axis is parallel to the second pivot axis so that the second rotating part rotates synchronously along with the second movable seat.
In any one of the above technical solutions, further, the second rotating portion is located above the first rotating portion, and a rolling contact is formed between a top surface of the first rotating portion and a bottom surface of the second rotating portion.
In any one of the above technical solutions, further, the first movable seat is annular, the first rotating portion is disposed inside the first movable seat, and a bottom of the first rotating portion forms rolling contact with the top plate;
the second movable seat is an arch with an avoiding hole formed in the top, two ends of the arch are respectively pivoted with the first movable seat, and the second rotating portion is arranged in the avoiding hole and connected with the hole wall of the avoiding hole.
Compared with the prior art, the beneficial effect of this application is:
the application provides a linear drive device includes that linear electric motor is elementary, position control subassembly, mount table component and centre gripping subassembly. The mount table component is used for setting up on the track plane between two sleepers, and the width direction's of mount table component both ends are passed through the centre gripping subassembly respectively and are held mutually with two tracks and be connected to can accomplish linear drive device's installation under the prerequisite of not destroying sleeper and orbital structure, can support mount table component and linear electric motor elementary very stably through the track plane in addition, and can not cause the accumulation of installation error.
Linear electric motor is elementary to be passed through position control assembly swing joint in the mount table component, position control assembly can adjust the primary position for the mount table component of linear electric motor, so that linear electric motor elementary move to with the predetermined position of the induction plate formation predetermined induction clearance on the test car, thereby can be when needs carry out collision test to the test car, with linear electric motor elementary move to predetermined position, improve the primary position precision under the user state of linear electric motor, furthermore, when need not carry out collision test, move away linear electric motor elementary from predetermined position, in order to realize taking in elementary to linear electric motor, neither influence carries out other experiments to the test car, also can avoid the primary accident of taking place of linear electric motor to collide with the damage.
That is to say, this linear drive device accomplishes linear drive device's installation under the prerequisite of not destroying sleeper and orbital structure, and is not only convenient for carry out high accuracy to the elementary position of linear electric motor and adjusts, is convenient for carry out batchization high accuracy to the elementary position of a plurality of linear electric motors moreover and adjusts, in addition, is convenient for accomodate the elementary good of linear electric motor, prolongs the elementary life of linear electric motor.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a first structural schematic diagram of a linear driving device according to an embodiment of the present disclosure;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a second structural schematic diagram of the linear driving device according to the embodiment of the present application;
FIG. 4 is an enlarged view of a portion of FIG. 3 at B;
fig. 5 is a schematic diagram of a third structure of a linear driving device provided in the embodiment of the present application (a track assembly is omitted);
fig. 6 is a fourth structural schematic diagram of the linear driving device according to the embodiment of the present application;
FIG. 7 is a schematic structural diagram of a rotational connection mechanism of a linear driving device according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a lifting adjustment mechanism of a linear driving device according to an embodiment of the present application.
Reference numerals:
1-a linear drive; 10-linear motor primary; 11-a position adjustment assembly; 110-a lift adjustment mechanism; 1100-top plate; 1101-a backplane; 1102-a lifting hinge frame; 1103-worm; 1104-a third rotational drive member; 111-attitude adjustment mechanism; 1110-a stationary base; 1111-a first movable seat; 1112-a second movable mount; 1113-avoiding hole; 1114 — a first rotary drive member; 1115 — a second rotary drive member; 112-a rotating connection; 1120-a first rotating part; 1121 — a second rotating part; 1122-third pivot axis; 113-a housing; 114-a mounting flange base; 12-mounting a table member; 120-a platform section; 121-a connecting part; 13-a clamping assembly; 130-a stationary part; 131-a first clamping portion; 132-a second clamping portion; 133-a pressing member; 2-a track assembly; 20-track; 200-rail bottom edge; 21-sleeper.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
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 meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1 to 8, an embodiment of the present application provides a linear drive device 1 for driving or braking a test vehicle, particularly a test vehicle for a crash test, on a track assembly 2, and specifically, the speed of the test vehicle can be adjusted by the linear drive device 1 to maintain the test vehicle at a predetermined running speed during a test run.
The track assembly 2 includes a plurality of sleepers 21 arranged along the length direction of the track assembly 2 at intervals, and two tracks 20, the two tracks 20 are arranged at two ends of the track 20 along the width direction of the track assembly 2, and the length direction of the two tracks 20 is consistent with the length direction of the track assembly 2.
The linear driving device 1 provided by the embodiment of the application comprises a linear motor primary 10, a position adjusting assembly 11, a mounting table member 12 and a clamping assembly 13.
Hereinafter, the above-described components of the linear drive device 1 will be described in detail.
In the alternative of this embodiment, the primary linear motor 10 and the induction plate jointly constitute a linear motor module, the linear motor module is a key component for driving or braking the test vehicle, the primary linear motor 10 is arranged on the track component 2, the induction plate is arranged at the bottom of the test vehicle, and under the condition that the primary linear motor 10 faces the induction plate, when the distance between the primary linear motor 10 and the induction plate is within the range of the preset induction gap, the primary linear motor 10 can provide power (driving force or braking force) for the test vehicle provided with the induction plate through electromagnetic induction.
In an alternative of this embodiment, the mounting table member 12 is arranged on a mounting plane between the two sleepers 21, that is, a plane for placing the sleepers 21, and both ends of the mounting table member 12 in the width direction are respectively connected to the two rails 20 by being clamped by the clamping assemblies 13.
On the one hand, since the accuracy of the mounting plane of the rail assembly 2 for testing is high, the mounting table member 12 can be stably supported by the mounting plane, and no accumulated error is generated due to the mounting accuracy of the linear motor primary 10 by the mounting plane.
On the other hand, because the installation plane is located below the plane of the rail 20, and the plane of the rail 20 refers to a plane determined by the upper surfaces of the two rails 20, a natural and free concave space is formed between the two sleepers 21 and the installation plane, so that the installation of the linear motor primary 10 can be completed through the installation table member 12 on the basis of not influencing the inherent structure of the rail 20 without additionally arranging an installation position for the installation table member 12, and the utilization rate of the free space between the two rails 20 is improved.
The linear motor primary 10 is movably connected to the mounting table member 12 through a position adjusting assembly 11, and the position adjusting assembly 11 can adjust the position of the linear motor primary 10 relative to the mounting table member 12 so that the linear motor primary 10 moves to a predetermined position, at which the linear motor primary 10 forms a predetermined induction gap with a sensing board on the test car, specifically, the linear motor primary 10 forms a predetermined induction gap with a sensing board of the test car in the height direction of the rail assembly 2.
Optionally, the predetermined sensing gap has a size of 2-4 mm.
That is, before the test car is tested, the position adjusting assembly 11 can adjust the linear motor primary 10 to a predetermined position where the linear motor primary 10 forms a predetermined induction gap with the induction plate of the bottom of the test car, so that the linear motor primary 10 can provide power to the test car when the test car is moved to face the linear motor primary 10.
On the contrary, after testing the test car, position control subassembly 11 adjusts the elementary 10 of linear electric motor to the home position, in order to accomodate, under the home position, because the distance between test car and the elementary 10 of linear electric motor is not in the within range of predetermined induction gap, so when the test car moves to when facing with the elementary 10 of linear electric motor, the elementary 10 of linear electric motor can't provide power to the test car, thereby can not be to other test production interference that need not the elementary 10 of linear electric motor for the test car provides power, also can not lead to it to be collided with the damage under the non-operating condition because accomodate improper to the elementary 10 of linear electric motor simultaneously.
In this embodiment, the clamping assembly 13 includes a clamping member and a pressing member 133, the clamping member includes a fixing portion 130, a first clamping portion 131 and a second clamping portion 132, the fixing portion 130 is welded or fastened to the mounting platform member 12, the first clamping portion 131 and the second clamping portion 132 are connected to the fixing portion 130 in a duckbill shape, the first clamping portion 131 extends below the rail bottom edge 200 and is pressed between the lower surface of the rail bottom edge 200 and the mounting plane, and the second clamping portion 132 is pressed against the upper surface of the rail bottom edge 200 by the pressing member 133.
Optionally, the pressing member 133 includes a washer and a pressing bolt.
Alternatively, the first clamping portion 131, the second clamping portion 132 and the fixing portion 130 are thick plates and are integrally formed. Furthermore, the first clamping portion 131, the second clamping portion 132 and the fixing portion 130 are made of metal.
Optionally, in order to protect the rail bottom edge 200, a scratch-proof gasket is disposed between the first clamping portion 131 and the lower surface of the rail bottom edge 200 and between the second clamping portion 132 and the upper surface of the rail bottom edge 200.
In an alternative of the present embodiment, the mount table member 12 includes a connecting portion 121 and a table portion 120.
Connecting portions 121 are connected to two ends of the width direction of the platform portion 120 respectively, the connecting portions 121 extend upwards relative to the platform portion 120, the clamping assembly 13 is arranged on the connecting portions 121, the connecting portions 121 are turned upwards relative to the end portions of the platform portion 120, usable space for connection between the clamping assembly 13 and the mounting table component 12 is enlarged, and accordingly connection convenience between the clamping assembly 13 and the mounting table component 12 is improved.
In addition, the clamping component 13 is supported by the connecting part 121, so that the installation height of the clamping component 13 is matched with the height of the bottom edge 200 of the rail, and the clamping reliability is improved.
Optionally, the longitudinal section of the connecting portion 121 is L-shaped, wherein the longitudinal section is a cross-sectional plane perpendicular to the length direction of the rail 20, a first side of the L-shape is erected on the platform portion 120, a second side of the L-shape extends from the platform portion 120 to the rail 20, and the fixing portion 130 of the clamping assembly 13 is connected to the second side of the L-shape.
Optionally, the connecting portion 121 and the platform portion 120 are integrally formed as a channel steel.
In an alternative of the present embodiment, the position adjusting assembly 11 includes an attitude adjusting mechanism 111 and a lift adjusting mechanism 110.
The posture adjusting mechanism 111 is provided to the mount table member 12 via the elevation adjusting mechanism 110, that is, the elevation adjusting mechanism 110 is provided to the mount table member 12, and the posture adjusting mechanism 111 is provided to the elevation adjusting mechanism 110, specifically, the elevation adjusting mechanism 110 is provided to the stage portion 120 of the mount table member 12.
Optionally, the position adjusting assembly 11 further includes a housing 113 and a mounting flange base 114, the posture adjusting mechanism 111 and the lifting adjusting mechanism 110 are both disposed in the housing 113, a top of the housing 113 is open, so that the posture adjusting mechanism 111 is connected to the primary linear motor 10 through the opening, and a bottom of the housing 113 is disposed in the mounting flange base 114, so that the housing 113 is fastened and connected to the platform portion 120 through the mounting flange base 114, thereby improving stability and reliability of connection between the position adjusting assembly 11 and the platform portion 120.
Both ends in the height direction of the elevation adjustment mechanism 110 can be relatively close to or apart from each other to drive the posture adjustment mechanism 111 and the linear motor primary 10 to be elevated with respect to the mount table member 12. Specifically, the elevation adjustment mechanism 110 can drive the linear motor primary 10 to ascend from the home position to the predetermined position, or drive the linear motor primary 10 to descend from the predetermined position to the home position. That is, the elevation adjustment mechanism 110 can adjust the height of the linear motor primary 10 with high accuracy.
In addition, since the primary linear motor 10 is flat, the parallelism between the sensing plate and the flat primary linear motor 10 affects the output torque of the linear motor module, and when the sensing plate is parallel to the primary linear motor 10, the output torque of the linear motor module is the largest.
Since the sensor plate is disposed parallel to the plane of the rail 20, the parallelism between the flat plate-shaped primary linear motor 10 and the plane of the rail 20 affects the output torque of the primary linear motor 10, and thus, in order to ensure that the maximum torque can be output from the linear motor module, the posture of the primary linear motor 10 is adjusted by the posture adjustment mechanism 111 so that the primary linear motor 10 is adjusted to and maintained in a posture parallel to the plane of the rail 20.
In this embodiment, the elevation adjustment mechanism 110 includes a top plate 1100, a bottom plate 1101, a retractable support member, and an elevation drive member.
The bottom plate 1101 is provided on the mount table member 12, and specifically, the bottom plate 1101 is attached to and fixedly connected to the bottom of the housing 113 so as to ensure that the bottom end of the ascent and descent adjusting mechanism 110 is stable.
The top plate 1100 is disposed on the top of the bottom plate 1101 at intervals, both ends of the telescopic supporting member in the height direction can be relatively extended and contracted and are respectively connected with the top plate 1100 and the bottom plate 1101, that is, the telescopic supporting member is telescopically supported between the top plate 1100 and the bottom plate 1101, and the driving member can drive the top plate 1100 to be lifted and lowered relative to the bottom plate 1101.
Therefore, when the lifting driving member drives the top plate 1100 to ascend or descend, the telescopic supporting member is stretched or compressed, and in the process, the telescopic supporting member is supported between the top plate 1100 and the bottom plate 1101 at any time, so that the load of the lifting driving member is shared, and the lifting stability of the top plate 1100, that is, the lifting stability of the linear motor primary 10, is improved. Further, when the elevating drive member is in a static state, the elevating drive member and the ropeable support member can share the load, and the linear motor primary 10 can be held at a predetermined position or an original position with high accuracy.
In this embodiment, the elevation drive member includes a worm 1103, a worm wheel, and a third rotational drive member 1104.
The top end of the worm 1103 is connected with the top plate 1100, the bottom end of the worm 1103 is movably arranged on the bottom plate 1101 in a penetrating mode, the worm wheel is meshed with the worm 1103, and the third rotating driving component 1104 is connected with the worm wheel and can drive the worm wheel to rotate so that the worm wheel drives the worm 1103 to drive the top plate 1100 to lift. The third driving member may be installed on the bottom plate 1101, the worm gear is disposed on the bottom plate 1101 through a worm gear frame, the bottom plate 1101 is provided with a through hole for reciprocating up and down of the bottom end of the worm 1103, and the top end of the worm 1103 is fixedly connected with the top plate 1100, so that when the third driving member drives the worm gear to rotate, the worm 1103 engaged with the worm gear is up and down in the through hole relative to the base, and drives the top plate 1100 to perform up and down movement.
The telescopic supporting member is a lifting hinge frame 1102, the supporting performance of the lifting hinge frame 1102 is high, two ends of the top plate 1100 are connected with two ends of the bottom plate 1101 in a one-to-one correspondence mode through the lifting hinge frame 1102, the top plate 1100 and the bottom plate 1101 are supported through the two lifting hinge frames 1102, one-side collapse and inclination of the top plate 1100 can be avoided, and the lifting stability of the top plate 1100 is further improved.
Alternatively, the elevating hinge brackets 1102 are provided at both ends of the top plate 1100 and the bottom plate 1101 in the longitudinal direction or the width direction.
Specifically, since the linear motor primary 10 and the posture adjustment mechanism are heavy, the load of the top plate 1100 is large, and the worm gear transmission structure and the lifting/lowering hinge frame 1102 have strong support performance and stability, so that the top plate 1100 can be ensured to cope with such a large load.
In this embodiment, the posture adjustment mechanism 111 includes a fixed base 1110, a first movable seat 1111, and a second movable seat 1112.
The fixing base 1110 is provided on the top plate 1100, so that other components of the posture adjustment mechanism 111 and the linear motor primary 10 are stably supported by the fixing base 1110.
The first movable seat 1111 is pivotally connected to the stationary base 1110 about a first pivot axis, so that the first movable seat 1111 can rotate relative to the stationary base 1110 about the first pivot axis.
The second movable base 1112 is pivotally connected to the first movable base 1111 about a second pivot axis, and the first pivot axis and the second pivot axis are disposed crosswise and located in the same plane parallel to the plane of the track 20, so that the second movable base 1112 can rotate about the second pivot axis relative to the fixed base 1110 and the first movable base 1111.
The linear motor primary 10 is disposed on the second movable seat 1112, so that the linear motor primary 10 can rotate with the first movable seat 1111 relative to the fixed base 1110 about the first pivot axis and can rotate with the second movable seat 1112 relative to the fixed base 1110 about the second pivot axis, and the linear motor primary 10 can be swung to be parallel to the plane of the track 20 by adjusting the position of the linear motor primary 10 about the first pivot axis and the position of the linear motor primary 10 about the second pivot axis.
Alternatively, the first pivot axis coincides with the length direction of the track assembly 2 and the second pivot axis coincides with the width direction of the track assembly 2.
In this embodiment, the posture adjustment mechanism further includes a first rotation driving member 1114, and the first rotation driving member 1114 is connected with the first movable seat 1111 to drive the first movable seat 1111 to rotate around the first pivot axis, so as to realize the automatic adjustment of the primary 10 position around the first pivot axis of the linear motor, thereby being beneficial to saving manpower, improving the batch adjustment efficiency, and being beneficial to improving the adjustment precision.
The posture adjusting mechanism further includes a second rotation driving member 1115, and the second rotation driving member 1115 is connected to the second movable seat 1112 to drive the second movable seat 1112 to rotate around the second pivot axis, so as to achieve automatic adjustment of the position of the linear motor primary 10 around the second pivot axis, which is beneficial to saving manpower, improving batch adjustment efficiency, and improving adjustment precision.
Optionally, the first, second and third rotary drive members 1114, 1115, 1104 are all rotary electric machines.
Optionally, the first and second rotary drive members 1114, 1115 are integrated into a dual-shaft power take-off module, which further has a laser sensor and a fixed value encoder to improve the adjustment accuracy.
Optionally, depth of field cameras are disposed on the inner sides of both rails 20, so that the position of the plane of the rails 20 is determined by the set of depth of field cameras to provide a basis for the first and second rotary drive members 1114, 1115 to adjust the attitude of the linear motor primary 10.
In this embodiment, the position adjusting assembly further includes a rotation connecting mechanism 112, and the rotation connecting mechanism 112 includes a first rotation portion 1120 and a second rotation portion 1121.
The first rotating part 1120 is connected with the first movable seat 1111, so that the first rotating part 1120 rotates synchronously with the first movable seat 1111; the second rotating portion 1121 is supported at the bottom of the primary linear motor 10, the second rotating portion 1121 is pivoted to the first rotating portion 1120 around a third pivot axis, the second rotating portion 1121 is connected to the second movable base 1112, and the third pivot axis and the second pivot axis are parallel to each other, so that the second rotating portion 1121 rotates synchronously with the second movable base 1112.
Therefore, transmission is realized between the fixed base 1110 and the linear motor primary 10 through two parallel transmission paths, wherein the first transmission path is from the fixed base 1110, the first movable base, the second movable base to the linear motor primary 10, the second transmission path is from the fixed base 1110, the first rotating part 1120, the second rotating part 1121 to the linear motor primary 10, the power of the first rotating driving member 1114 is applied to the first movable base, and the power of the second rotating driving member 1115 is applied to the second movable base, so that the first rotating part 1120 and the second rotating part 1121 move along with the first movable base and the second movable base, that is, the second transmission path provides power for the second transmission path, and the second transmission path provides support for the first transmission path, and further, the two transmission paths are matched, so that the linear motor primary 10 can be stably ensured, The swing of high accuracy reduces the regulation precision error that produces in the transmission process.
Alternatively, the first rotating portion 1120 and the second rotating portion 1121 are pivoted by a third pivot shaft 1122, and an axis of the third pivot shaft 1122 coincides with the third pivot axis.
In the present embodiment, the second rotation portion 1121 is located above the first rotation portion 1120, and rolling contact is formed between the top surface of the first rotation portion 1120 and the bottom surface of the second rotation portion 1121, and specifically, the term "rolling contact" refers to a case where at least one of the first rotation portion 1120 and the second rotation portion 1121 is formed with a surface such as an arc-shaped contact surface or a spherical contact surface that enables relative rolling of the two about the third pivot axis.
In this embodiment, the first movable seat 1111 is annular, and the first rotating portion 1120 is disposed in the first movable seat 1111, that is, the first rotating portion 1120 is embedded in the first movable seat 1111, so as to effectively save the installation space and increase the stroke and the posture adjusting range of the primary linear motor 10.
The bottom of the first rotating portion 1120 is in rolling contact with the top plate 1100, and on one hand, the top plate 1100 can support the first rotating portion 1120 by making the two contact with each other, so as to improve the bearing upper limit and bearing stability of the rotating connecting member, and on the other hand, the first rotating portion 1120 can rotate around the first pivot axis by making the top plate 1100 support by making the rolling contact, so that the rotation of the first rotating portion 1120 and the first movable seat 1111 is more stable.
Here, the "rolling contact" means a case where at least one of the bottom portion of the first rotating portion 1120 and the top plate 1100 is formed with a surface such as an arc-shaped contact surface or a spherical contact surface that enables relative rolling of the bottom portion and the top plate around the fourth pivot axis, and the fourth pivot axis is parallel to the first pivot axis.
Among them, in order to ensure stable support of the top plate 1100, the top surface of the top plate 1100 except for the position contacting the first rotation part 1120 may be provided as a plane.
The second movable base 1112 is arched, and the arched structure has a strong bearing capability, so that the second rotating portion 1121 can support the linear motor primary 10 more stably and reliably.
The two ends of the arc are respectively pivoted with the first movable seat 1111, so that the second movable seat 1112 can rotate around the second pivot axis relative to the first movable seat 1111.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. A linear driving device is used for driving or braking a test vehicle on a track assembly, wherein the track assembly comprises a plurality of sleepers arranged side by side at intervals along the length direction of the track assembly and two tracks, and the two tracks are arranged at two ends of the track along the width direction of the track assembly;
the linear driving device comprises a linear motor primary, a position adjusting assembly, a mounting table component and a clamping assembly;
the mounting platform component is arranged on a mounting plane between the two sleepers, and two ends of the mounting platform component in the width direction are respectively connected with the two rails in a clamping manner through the clamping components;
the primary linear motor is movably connected to the mounting table component through the position adjusting component, and the position adjusting component can adjust the position of the primary linear motor relative to the mounting table component, so that the primary linear motor moves to a preset position where a preset induction gap is formed between the primary linear motor and an induction plate on the test vehicle.
2. The linear drive of claim 1, wherein the mounting table member includes a connecting portion and a table portion;
the platform part is in a flat plate shape and is used for being attached to the installation plane, and the position adjusting assembly is arranged on the top surface of the platform part;
the both ends of the width direction of platform portion are connected with respectively connecting portion, connecting portion for platform portion upwards extends, the centre gripping subassembly set up in connecting portion.
3. The linear drive of claim 1, wherein the position adjustment assembly includes an attitude adjustment mechanism and a lift adjustment mechanism;
the posture adjusting mechanism is arranged on the mounting table component through the lifting adjusting mechanism;
the two ends of the lifting adjusting mechanism in the height direction can be relatively close to or far away from each other so as to drive the posture adjusting mechanism and the linear motor primary to lift relative to the mounting table component.
4. The linear drive of claim 3, wherein the lift adjustment mechanism includes a top plate, a bottom plate, a telescoping support member, and a lift drive member;
the bottom plate is arranged on the mounting table component, the top plate is arranged at the top of the bottom plate at intervals, two ends of the telescopic supporting component in the height direction can be relatively telescopic and are respectively connected with the top plate and the bottom plate, and the lifting driving component can drive the top plate to lift relative to the bottom plate.
5. The linear drive of claim 4, wherein the elevation drive member comprises a worm, a worm gear, and a third rotational drive member;
the top end of the worm is connected with the top plate, the bottom end of the worm movably penetrates through the bottom plate, and the worm wheel is meshed with the worm;
the third rotation driving component is connected with the worm wheel and can drive the worm wheel to rotate, so that the worm wheel drives the worm to drive the top plate to lift;
the telescopic supporting member is a lifting hinge frame, and the two ends of the top plate are connected with the two ends of the bottom plate through the lifting hinge frame in a one-to-one correspondence mode.
6. The linear driving apparatus as claimed in claim 4, wherein the posture adjustment mechanism includes a fixed base, a first movable base, and a second movable base;
the fixing base is arranged on the top plate, the first movable seat is pivoted to the fixing base around a first pivot axis, the second movable seat is pivoted to the first movable seat around a second pivot axis, and the first pivot axis and the second pivot axis are arranged in a crossed mode and are located in the same plane parallel to the track plane.
7. The linear drive of claim 6, wherein the attitude adjustment mechanism further comprises a first rotational drive member coupled to the first movable mount for driving the first movable mount to rotate about the first pivot axis;
the posture adjusting mechanism further comprises a second rotation driving component, and the second rotation driving component is connected with the second movable seat to drive the second movable seat to rotate around the second pivot axis.
8. The linear drive of claim 7 wherein the position adjustment assembly further comprises a rotational connection mechanism comprising a first rotational portion and a second rotational portion;
the first rotating part is connected with the first movable seat so as to enable the first rotating part to synchronously rotate along with the first movable seat;
the second rotating part is supported at the bottom of the primary winding of the linear motor, the second rotating part is pivoted to the first rotating part around a third pivot axis, the second rotating part is connected with the second movable seat, and the third pivot axis is parallel to the second pivot axis so that the second rotating part rotates synchronously along with the second movable seat.
9. The linear drive of claim 8, wherein the second rotating portion is located above the first rotating portion, and a top surface of the first rotating portion and a bottom surface of the second rotating portion form a rolling contact therebetween.
10. The linear driving device according to claim 8, wherein the first movable seat has a ring shape, the first rotating portion is provided inside the first movable seat, and a bottom portion of the first rotating portion is in rolling contact with the top plate;
the second movable seat is an arch with an avoiding hole formed in the top, two ends of the arch are respectively pivoted with the first movable seat, and the second rotating portion is arranged in the avoiding hole and connected with the hole wall of the avoiding hole.
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| CN202111368160.8A CN114061885B (en) | 2021-11-18 | 2021-11-18 | Linear driving device |
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| CN202111368160.8A CN114061885B (en) | 2021-11-18 | 2021-11-18 | Linear driving device |
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