Linear driving system for bridge inspection vehicle

Abstract

The utility model discloses a linear driving system for a bridge inspection vehicle, which comprises a guide rail, an electromagnetic winding, a connecting mechanism, a walking mechanism, a connecting seat and a sports car assembly, a conductive plate is arranged at the lower end of the guide rail along the length direction of the guide rail, the electromagnetic winding is arranged below the conductive plate and is connected with the connecting mechanism, and the walking mechanism is connected with the connecting seat. The two ends of the connecting mechanism are connected with the walking mechanisms respectively, the upper ends of the walking mechanisms are connected with the guide rail in a sliding mode, the lower ends of the walking mechanisms are connected with the connecting base, and the connecting base is arranged below the connecting mechanism and is connected with the guide rail in a sliding mode through at least two groups of the sports car assemblies. According to the linear driving system for the bridge inspection vehicle, electric energy can be directly converted into mechanical energy to drive the inspection vehicle to walk, and the efficiency of the motor is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of bridge inspection vehicles, and more specifically, to a linear drive system for a bridge inspection vehicle. Background Art

[0002] At present, in high-speed railway bridge projects, bridge inspection vehicles are used to provide a working platform for bridge inspectors, so that they can complete their work content stably and safely during the operation process. The bridge inspection vehicle is generally composed of a truss system, a gantry, a drive system, a power supply system and a control system, wherein the drive system can be driven by a motor to drive the inspection vehicle to move as a whole. The existing drive system is generally composed of a motor, a drive wheel, a drive box, a guide wheel, a limit device, a manual parking device and a manual drive device. When walking, the motor drives the running wheels to move at the same time through the gear transmission box, thereby realizing the forward and backward movement of the inspection vehicle. However, the above process undergoes multiple steps of transmission, such as from the motor shaft to the gear, and from the gear to the running wheel, which makes the motor power loss large and the motor efficiency low. Utility Model Content

[0003] The utility model aims to provide a linear drive system for a bridge inspection vehicle, which can directly convert electrical energy into mechanical energy to drive the inspection vehicle to move, thereby greatly improving the efficiency of the motor.

[0004] The utility model provides a technical solution to the above-mentioned technical problems as follows: a linear drive system for a bridge inspection vehicle, comprising a guide rail, an electromagnetic winding, a connecting mechanism, a running mechanism, a connecting seat and a sports car assembly, wherein a conductive plate is provided at the lower end of the guide rail along its length direction, the electromagnetic winding is arranged below the conductive plate and is connected to the connecting mechanism, the two ends of the connecting mechanism are respectively connected to the running mechanism, the upper end of the running mechanism is slidably connected to the guide rail, and the lower end thereof is connected to the connecting seat, the connecting seat is arranged below the connecting mechanism, and is slidably connected to the guide rail through at least two groups of the sports car assemblies.

[0005] Preferably, in the linear drive system for a bridge inspection vehicle, the connecting mechanism includes an upper plate body and a lower plate body, the distance between the upper plate body and the lower plate body is adjustable, and they are connected by a connecting assembly, the electromagnetic winding is arranged at the upper end of the upper plate body, and the two ends of the lower plate body are respectively connected to the two groups of the running mechanisms.

[0006] Preferably, in the linear drive system for a bridge inspection vehicle, the connecting assembly includes a plurality of threaded rods arranged at intervals, the threaded rods vertically passing through the upper plate body and the lower plate body, and four nuts are threadedly mounted thereon, and the nuts are respectively provided on the upper and lower sides of the upper plate body and the lower plate body.

[0007] Preferably, in the linear drive system for a bridge inspection vehicle, the running mechanism includes two first running wheels, a support and a hinge, the two first running wheels are slidably arranged on the guide rail, the support is arranged below the guide rail, and the upper end thereof is rotatably connected to two connecting plates, the two connecting plates are respectively rotatably connected to the two first running wheels, one end of the hinge is rotatably connected to the lower end of the support, and the other end thereof is rotatably connected to the connecting seat.

[0008] Preferably, in the linear drive system for a bridge inspection vehicle, the sports car assembly includes two side panels and four second running wheels, the two side panels are arranged opposite to each other, and their ends close to each other are rotatably connected to two of the second running wheels, the second running wheels are slidably arranged on the guide rails, the two side panels are connected by a plurality of connecting rods, the lower ends of the side panels are connected to support plates, the support plates are connected to the connecting seats, and the other ends of the two hinges are rotatably connected to the two support plates.

[0009] Preferably, in the linear drive system for a bridge inspection vehicle, one end of the side plate is rotatably connected to a vertically arranged guide wheel, and the guide wheel is slidably fitted with the guide rail.

[0010] The beneficial effects of the utility model are:

[0011] 1. The linear drive system of the utility model for the bridge inspection vehicle can directly convert electrical energy into mechanical energy to drive the inspection vehicle to move, greatly improving the efficiency of the motor.

[0012] 2. The linear drive system for the bridge inspection vehicle of the utility model eliminates parts such as gears and couplings that reduce the mechanical life, has lower maintenance costs, and has the advantages of low noise, energy saving, and fast acceleration and deceleration during driving.

[0013] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the linear drive system described in the utility model;

[0015] Figure 2 This is a working principle diagram of the electromagnetic winding described in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the electromagnetic winding described in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the connecting mechanism described in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the running mechanism described in the utility model;

[0019] Figure 6 A simplified transmission model of a drive system of the linear drive system of the utility model;

[0020] Figure 7 It is a structural schematic diagram of the sports car assembly described in the utility model. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Figure 1-Figure 3 A linear drive system for a bridge inspection vehicle provided in an embodiment of the utility model includes a guide rail 1, an electromagnetic winding 2, a connecting mechanism 3, a running mechanism 4, a connecting seat 5 and a sports car assembly 6, wherein a conductive plate 7 is provided at the lower end of the guide rail 1 along its length direction, the electromagnetic winding 2 is arranged below the conductive plate 7 and connected to the connecting mechanism 3, the two ends of the connecting mechanism 3 are respectively connected to the running mechanism 4, the upper end of the running mechanism 4 is slidably connected to the guide rail 1, and the lower end thereof is connected to the connecting seat 5, the connecting seat 5 is arranged below the connecting mechanism 3, and is slidably connected to the guide rail 1 through at least two groups of the sports car assemblies 6.

[0024] In this embodiment, a linear motor structure is formed between the guide rail 1, the conductive plate 7, the electromagnetic winding 2, the connecting mechanism 3 and the running mechanism 4, so that the connecting seat 5 is driven to move by the linear motor structure, and the connecting seat 5 slides stably on the guide rail 1 through at least two sets of running car components 6. After the linear motor structure is powered on, relative displacement will occur between the electromagnetic winding 2 and the conductive plate 7. At this time, the running mechanism 4 moves the electromagnetic winding 2 and the connecting mechanism 3 along the length direction of the guide rail 1, and finally drives the connecting seat 5 to move. The connecting seat 5 is connected to the bridge inspection vehicle, and the bridge inspection vehicle can be driven to move during the movement.

[0025] Specifically, the linear motor is to unfold and straighten the primary of the traditional cylindrical motor, change the primary closed magnetic field into an open magnetic field, and the stator part of the rotary motor becomes the primary of the linear motor, and the rotor part of the rotary motor becomes the secondary of the linear motor. In this embodiment, the material of the guide rail 1 is generally steel. Due to the large resistivity of steel, the electromagnetic performance of the steel secondary linear motor is poor, and the normal suction force is also about 10 times the thrust. Therefore, a conductive plate 7 is generally added to the bottom of the guide rail 1. It is an aluminum plate or a copper plate to improve the electromagnetic performance of the secondary. The electromagnetic winding 2 consists of a coil, an iron core and an aluminum base. The coil is first installed on the iron core of the iron lamination, and then installed on the aluminum base. The iron lamination is used to guide the magnetic field. Since the magnetic field generated by the winding is concentrated, the iron core motor increases its output performance. In order to reduce eddy current loss, the iron core adopts a laminated structure and is mainly made of stacked insulated transformer sheets. In addition, since the winding is wound on the iron lamination, the heat conduction is fast, so the heat dissipation effect is good, and its relatively open structure is also conducive to heat dissipation.

[0026] The guide rail 1 and the conductive plate 7 at its bottom serve as the secondary of the DC motor, and the electromagnetic winding 2 serves as the primary of the DC motor. The electromagnetic winding 2 is energized by an external power supply, and the electromagnetic winding 2 generates an air gap magnetic field. When the longitudinal edge effect caused by the disconnection of the two ends of the iron core is not considered, the distribution of this air gap magnetic field is similar to that of a rotating motor, and is distributed along the straight line according to the sine law, but it does not rotate but translates along the straight line, which is called a traveling wave magnetic field (as shown in the curve 2 in the figure below). Obviously, the moving speed of the traveling wave magnetic field is the same as the linear speed of the rotating magnetic field on the inner surface of the stator, and the moving speed of the traveling wave magnetic field is called the synchronous speed.

[0027]

[0028] In the formula: D is the diameter of the inner circumference of the stator of the rotating motor; τ is the pole pitch, τ=πD / 2P; P is the number of pole pairs; f1 is the frequency of the power supply.

[0029] The traveling wave magnetic field cuts the secondary, generating induced electromotive force and current in the secondary. The secondary current interacts with the air gap magnetic field to generate tangential electromagnetic force. Since the secondary, i.e., the guide rail 1, is fixed, the primary drives the driving mechanism to move in a straight line along the moving direction of the traveling wave magnetic field under the action of electromagnetic thrust. If the speed of the primary movement is represented by v and the slip rate is represented by s, then:

[0030]

[0031] In electric state, s is between 0 and 1. The primary moving speed is:

[0032] V=(1-s)V s =2τf1(1-s)

[0033] It can be seen that changing the pole pitch or the power supply frequency can change the speed of the primary movement; changing the phase sequence of power in the winding can change the direction of the primary movement, so that the linear drive system can move in both directions through the control system.

[0034] Preferably, as another embodiment of the present utility model, Figure 4 As shown, the connecting mechanism 3 includes an upper plate body 31 and a lower plate body 32. The distance between the upper plate body 31 and the lower plate body 32 is adjustable and they are connected by a connecting component. The electromagnetic winding 2 is arranged at the upper end of the upper plate body 31, and the two ends of the lower plate body 32 are respectively connected to the two groups of the running mechanisms 4.

[0035] In this embodiment, the lower plate 32 is fixedly connected to the running mechanism 4 and its position is fixed. The upper plate 31 and the lower plate 32 are connected by a connecting assembly. By adjusting the position of the upper plate 31, the spacing between the electromagnetic winding 2 and the conductive plate 7, i.e., the air gap, can be adjusted. When the air gap needs to be adjusted during on-site installation or other situations, this connection method is conducive to timely adjustment by the staff. Specifically, the connecting assembly includes a plurality of threaded rods 33 arranged at intervals. The threaded rods 33 vertically penetrate the upper plate 31 and the lower plate 32, and four nuts 34 are threadedly installed thereon. The upper and lower sides of the upper plate 31 and the lower plate 32 are respectively provided with nuts 34. Tighten all the nuts 34 so that the nuts 34 on both sides of the upper plate 31 and the lower plate 32 clamp them. In this way, the threaded rods 33 are connected and fixed to the upper plate 31 and the lower plate 32.

[0036] Preferably, as another embodiment of the present utility model, Figure 5-Figure 6 As shown, the running mechanism 4 includes two first running wheels 41, a support 42 and a hinge 43. The two first running wheels 41 are both slidably arranged on the guide rail 1. The support 42 is arranged below the guide rail 1, and its upper end is rotatably connected to two connecting plates 44. The two connecting plates 44 are rotatably connected to the two first running wheels 41 respectively. One end of the hinge 43 is rotatably connected to the lower end of the support 42, and the other end is rotatably connected to the connecting seat 5.

[0037] In this embodiment, after the linear motor structure is powered on, since the positions of the guide rail 1 and the conductive plate 7 are fixed, the electromagnetic thrust generated acts on the electromagnetic winding 2, driving it to move, and finally driving the running mechanism 4 and the connecting mechanism 3 to move, and then driving the sports car assembly 6 and the connecting seat 5 to move. In the above structure, when the track is flat and the linear drive system is running normally, the connecting plate 44, the support 42 and the hinge 43 are in a balanced state. At this time, the support 42 is immovable relative to the linear drive system, and the air gap between the coil and the conductive plate 7 at the bottom of the track is maintained at the initial setting value. When the linear drive system travels to the track docking point, there is an error in the docking of the two sections of the track, or other situations cause the track to be uneven and slightly undulating. At this time, under the action of gravity, the first running wheel 41 can still press on the guide rail 1, and the connecting plate 44, the support 42 and the hinge 43 will move, so that the connecting mechanism 3 remains stable, thereby realizing the adaptive adjustment of the air gap, that is, ensuring that the air gap is stable near the initial setting value.

[0038] Preferably, as another embodiment of the present utility model, Figure 7 As shown, the sports car assembly 6 includes two side panels 61 and four second running wheels 62. The two side panels 61 are arranged opposite to each other, and the ends thereof close to each other are rotatably connected to the two second running wheels 62, and the second running wheels 62 are slidably arranged on the guide rail 1. The two side panels 61 are connected by a plurality of connecting rods 63. The lower ends of the side panels 61 are connected to support plates 64, and the support plates 64 are connected to the connecting seat 5. The other ends of the two hinges 43 are rotatably connected to the two support plates 64. One end of the side panel 61 is rotatably connected to a vertically arranged guide wheel 65, and the guide wheel 65 is slidably fitted with the guide rail 1.

[0039] In this embodiment, the second running wheels 62 are mounted on the inner side of the side plate 61, the guide wheel 65 mounting plate is mounted on the outer side of the side plate 61, and the bottom of the side plate 61 is connected and fixed to the connecting seat 5 through a connecting shaft. Among them, the guide wheels 65 make the movement of the linear drive system always on the track, and the two pairs of second running wheels 62 serve as the main force wheels, making the driving process of the linear drive system more stable.

[0040] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A linear drive system for a bridge inspection vehicle, characterized in that: The invention comprises a guide rail (1), an electromagnetic winding (2), a connecting mechanism (3), a running mechanism (4), a connecting seat (5) and a sports car assembly (6); a conductive plate (7) is provided at the lower end of the guide rail (1) along its length direction; the electromagnetic winding (2) is arranged below the conductive plate (7) and connected to the connecting mechanism (3); the two ends of the connecting mechanism (3) are respectively connected to the running mechanism (4); the upper end of the running mechanism (4) is slidably connected to the guide rail (1) and the lower end thereof is connected to the connecting seat (5); the connecting seat (5) is arranged below the connecting mechanism (3) and is slidably connected to the guide rail (1) through at least two groups of sports car assemblies (6).

2. A linear drive system for a bridge inspection vehicle as claimed in claim 1, characterized in that: The connecting mechanism (3) comprises an upper plate body (31) and a lower plate body (32); the distance between the upper plate body (31) and the lower plate body (32) is adjustable and they are connected via a connecting assembly; the electromagnetic winding (2) is arranged at the upper end of the upper plate body (31); and the two ends of the lower plate body (32) are respectively connected to the two sets of the running mechanisms (4).

3. A linear drive system for a bridge inspection vehicle as claimed in claim 2, characterized in that: The connection assembly comprises a plurality of threaded rods (33) arranged at intervals, wherein the threaded rods (33) vertically penetrate the upper plate body (31) and the lower plate body (32), and four nuts (34) are threadedly mounted thereon. The nuts (34) are respectively arranged on the upper and lower sides of the upper plate body (31) and the lower plate body (32).

4. A linear drive system for a bridge inspection vehicle as claimed in claim 2, characterized in that: The running mechanism (4) comprises two first running wheels (41), a support (42) and a hinge (43); the two first running wheels (41) are both slidably arranged on the guide rail (1); the support (42) is arranged below the guide rail (1); the upper end of the support is rotatably connected to two connecting plates (44); the two connecting plates (44) are respectively rotatably connected to the two first running wheels (41); one end of the hinge (43) is rotatably connected to the lower end of the support (42); and the other end of the hinge is rotatably connected to the connecting seat (5).

5. A linear drive system for a bridge inspection vehicle as claimed in claim 4, characterized in that: The sports car assembly (6) comprises two side panels (61) and four second running wheels (62). The two side panels (61) are arranged opposite to each other, and one end of the side panels (61) close to each other is rotatably connected to the two second running wheels (62). The second running wheels (62) are slidably arranged on the guide rail (1). The two side panels (61) are connected by a plurality of connecting rods (63). The lower end of the side panel (61) is connected to a support plate (64), and the support plate (64) is connected to the connecting seat (5). The other ends of the two hinged parts (43) are rotatably connected to the two support plates (64).

6. A linear drive system for a bridge inspection vehicle as claimed in claim 5, characterized in that: One end of the side plate (61) is rotatably connected to a vertically arranged guide wheel (65), and the guide wheel (65) is slidably fitted with the guide rail (1).

Images