Pressure-adjustable rigid catenary grinding device

Abstract

The utility model discloses a kind of rigid contact network polishing devices with adjustable pressure, belong to rigid contact network polishing equipment field, including bottom plate, line surface polishing unit, two edge polishing units, control system, first lifting mechanism and second lifting mechanism;The line surface polishing unit and two edge polishing units all include polishing head, driving mechanism and displacement sensor;Line surface polishing unit is independently lifted by first lifting mechanism, and two edge polishing units are synchronously lifted by second lifting mechanism;Control system can calculate the vertical adjustment value of first lifting mechanism and second lifting mechanism according to preset pressure-travel relationship curve and voltage signal respectively and execute adjustment, to realize the active adjustment of the polishing pressure of line surface polishing unit and the polishing pressure of two edge polishing units. The utility model can realize active, real-time adjustment to polishing pressure, and significantly improve polishing quality.

Description

Technical Field

[0001] This utility model belongs to the field of rigid contact wire grinding equipment, specifically relating to a pressure-adjustable rigid contact wire grinding device. Background Technology

[0002] Rigid overhead contact lines are a widely used power supply method in urban rail transit. They mainly consist of aluminum alloy busbars and contact wires embedded in them. During subway train operation, power is supplied to the train through the sliding contact between the pantograph and the contact wire. However, as subway train mileage increases, the pantograph experiences irregular wear on the contact wire surface due to long-term sliding friction. This leads to a deterioration of the pantograph-contact line contact relationship, contact pressure imbalance, and a decrease in current collection quality, significantly affecting the stability of the power supply system and threatening train safety. Therefore, it is necessary to closely monitor the wear condition and perform grinding and maintenance on the contact wire as needed, promptly repairing the worn surfaces and restoring their surface smoothness.

[0003] Currently, there are two main methods for contact wire polishing. One is manual sanding, where operators use coarse sandpaper to remove burrs, cuts, and arcing, and then polish the contact wire with fine sandpaper. The other is manual polishing using a nylon polishing wheel in conjunction with an electric device, primarily using a handheld rechargeable polisher instead of sandpaper. However, both methods suffer from low polishing efficiency and poor polishing results. Polishing long-distance contact wires is time-consuming and labor-intensive, and the polishing process relies entirely on the operator's feel, making it impossible to consistently control the polishing force. Too little force results in poor polishing, while too much force may damage the contact wire.

[0004] To address the aforementioned issues, some companies have begun using contact wire grinding machines. However, while these machines can perform stable grinding, they cannot adjust the pressure of the grinding discs according to the grinding conditions. Based on this, a patent has improved the structure of the grinding machine by adding a spring compensation mechanism to passively compensate for the grinding pressure, partially mitigating the impact of irregular wear on the contact wire surface under fixed grinding pressure. However, this solution cannot actively and in real-time adjust the grinding pressure according to the wear state at different locations on the contact wire surface. The problem of excessive grinding pressure at protruding areas and insufficient grinding pressure at recessed areas remains unresolved, making it difficult to guarantee grinding quality. Therefore, there is an urgent need for a rigid contact wire grinding device that can solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a pressure-adjustable rigid contact wire grinding device to address the aforementioned shortcomings, thereby solving the problem that current grinding devices cannot actively adjust the grinding pressure according to the surface condition of the contact wire. To achieve the above objective, this invention provides the following technical solution: A pressure-adjustable rigid contact wire grinding device includes a control system, a base plate, a surface grinding unit, and two edge grinding units. The surface grinding unit and the two edge grinding units are all mounted on the top of the base plate; each surface grinding unit and each edge grinding unit includes a grinding head, a drive mechanism and a displacement sensor; each drive mechanism is connected to the corresponding grinding head for rotational drive; each displacement sensor acquires a voltage signal in real time according to the lifting and lowering of the corresponding grinding head and outputs it to the control system; each drive mechanism and each displacement sensor are independently electrically connected to the control system. It also includes a first lifting mechanism and a second lifting mechanism; the first lifting mechanism is used to drive the grinding head of the line surface grinding unit to rise and fall independently in the vertical direction, so as to come into contact with or detach from the contact line surface; the second lifting mechanism is used to synchronously drive the grinding heads of the two edge grinding units to rise and fall vertically, so as to come into contact with or detach from the contact line surface at the same time. The control system is also electrically connected to the first lifting mechanism and the second lifting mechanism respectively. The control system can calculate the vertical adjustment value of the first lifting mechanism and the second lifting mechanism respectively according to the received voltage signal and the preset pressure-stroke relationship curve, and control the first lifting mechanism and the second lifting mechanism to perform lifting according to the corresponding vertical adjustment value, thereby realizing the active adjustment of the grinding pressure of the surface grinding unit and the grinding pressure of the two edge grinding units.

[0006] Furthermore, the driving mechanism includes a first mounting base, a rotary motor, a transmission assembly, and an L-shaped plate; the grinding head and the rotary motor are simultaneously mounted on the upper and lower sides of the first mounting base; the transmission assembly is used to drive the grinding head and the rotary motor to rotate synchronously; the rotary motor is electrically connected to the control system; the first side of the L-shaped plate is fixedly connected to the upper part of the first mounting base, and the second side is used to connect to the first lifting mechanism or the second lifting mechanism.

[0007] Furthermore, the transmission assembly includes a first pulley, a second pulley, and a belt; both the first pulley and the second pulley are movably mounted on the first mounting base in the front-rear direction; both ends of the first pulley protrude from the first mounting base, and the front end is connected to the grinding head; both ends of the second pulley protrude from the first mounting base, and the front end is connected to the rotary motor for drive; the rear ends of the first pulley and the rear ends of the second pulley are connected by belt drive.

[0008] Furthermore, the first lifting mechanism includes a stepper motor, a lead screw, a first connecting plate, a spring, and a sliding assembly; the stepper motor is fixed to the base plate and electrically connected to the control system; a lead screw is driven and connected to the output end of the stepper motor; the lead screw movably passes through the first connecting plate and is threadedly engaged with the first connecting plate; the sliding assembly includes a slider and a slide rail; the slide rail is vertically installed above the base plate, and the slider slidably engages with the slide rail; the slider is fixedly connected to the first connecting plate; a first horizontal plate is provided on the second side of the L-shaped plate; a second horizontal plate is provided on the first connecting plate; the spring is vertically disposed between the first horizontal plate and the second horizontal plate.

[0009] Furthermore, the second lifting mechanism includes a stepper motor, a lead screw, a long plate, two second connecting plates, two springs, and two sliding components; the stepper motor is fixed to the base plate and electrically connected to the control system; the lead screw movably passes through the middle of the long plate and is threaded into the long plate; the two second connecting plates are respectively connected to both ends of the long plate; each sliding component includes a slider and a slide rail, and the two sliding components correspond one-to-one with the two edge grinding units; the slide rail is vertically installed above the base plate, and the slider slides on the slide rail; each slider is fixedly connected to one of the second connecting plates; a first horizontal plate is provided on the second side corresponding to the two edge grinding units; a third horizontal plate is provided on each second connecting plate; each spring is vertically arranged between the first horizontal plate and the third horizontal plate.

[0010] Furthermore, each end of the long plate is provided with a waist-shaped through hole; a connecting bolt is provided below the second connecting plate; the connecting bolt is movably fitted into the waist-shaped through hole.

[0011] Furthermore, the displacement sensor is a potentiometer; the potentiometer is mounted on the side wall of the second side away from the spring.

[0012] Furthermore, it also includes three position sensors; the three position sensors are used to monitor whether the vertical position of the line surface grinding unit and the vertical position of the two edge grinding units are in their initial positions before grinding begins or after grinding ends.

[0013] Furthermore, the surface grinding unit and the two edge grinding units are arranged sequentially along the length of the base plate, and the two edge grinding units are arranged opposite each other.

[0014] Furthermore, it also includes a traveling mechanism; the traveling mechanism is disposed on the base plate; the traveling mechanism is used to be mounted on the busbar and move along the length direction of the busbar.

[0015] The beneficial effects of this utility model are: 1. This utility model, through the cooperation of a displacement sensor and a control system, adjusts the vertical positions of the surface grinding unit and the two edge grinding units respectively, thereby achieving real-time and active adjustment of the grinding pressure of the surface grinding unit and the two edge grinding units, thus improving the overall grinding quality.

[0016] 2. This utility model synchronously controls the lifting and lowering of two edge grinding units through a second lifting mechanism. Only one lead screw and motor are needed to simultaneously drive the lifting and lowering of the edge grinding heads on both sides, reducing equipment costs. Simultaneously, the oblong through holes at both ends of the long plate are movable and engage with the connecting bolts of the two second connecting plates, allowing for a few millimeters of stroke difference between the two edge grinding units while maintaining synchronous lifting and lowering. When the wear on the edge of the contact line on both sides is uneven, it can be compensated for by the slight oscillation of the long plate and the change in spring compression, avoiding excessive differences in grinding pressure on both sides and improving the uniformity of grinding on both sides. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention installed on the busbar; Figure 2 This is a three-dimensional structural schematic diagram of the present invention and its walking mechanism; Figure 3 This is a three-dimensional structural schematic diagram of the present invention; Figure 4 This is a utility model Figure 3 Enlarged schematic diagram of section A in the middle structure; Figure 5 This is a utility model Figure 3 Enlarged schematic diagram of section B in the middle structure; Figure 6 This is a side view of the present invention; Figure 7 This is a schematic diagram showing the grinding positions corresponding to the three grinding units of this utility model. In the attached diagram: 0. Busbar; 1. Base plate; 2. Grinding head; 3. Drive mechanism; 4. Displacement sensor; 6. Position sensor; 7. Walking mechanism; 11. Rib plate; 31. First mounting base; 32. Rotary motor; 33. Transmission assembly; 34. L-shaped plate; 331. First pulley; 332. Second pulley; 333. Belt; 341. First side; 342. Second side; 343. First horizontal plate; 51. Stepper motor; 52. Lead screw; 53. First connecting plate; 531. Second horizontal plate; 54. Spring; 55. Slider; 56. Slide rail; 57. Long plate; 58. Second connecting plate; 581. Third horizontal plate. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0020] In the description of this utility model, "multiple" means two or more.

[0021] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0022] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0023] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0025] Example 1: See attached Figures 1-3 7. A pressure-adjustable rigid contact wire grinding device, comprising a control system, a base plate 1, a surface grinding unit, and two edge grinding units; The surface grinding unit and the two edge grinding units are all mounted on the top of the base plate 1; each surface grinding unit and each edge grinding unit includes a grinding head 2, a drive mechanism 3 and a displacement sensor 4; each drive mechanism 3 is rotatably driven by the corresponding grinding head 2; each displacement sensor 4 acquires a voltage signal in real time according to the lifting and lowering of the corresponding grinding head 2 and outputs it to the control system; each drive mechanism 3 and each displacement sensor 4 are independently electrically connected to the control system. It also includes a first lifting mechanism and a second lifting mechanism; the first lifting mechanism is used to drive the grinding head 2 of the line surface grinding unit to rise and fall independently in the vertical direction, so as to come into contact with or detach from the contact line surface; the second lifting mechanism is used to synchronously drive the grinding heads 2 of the two edge grinding units to rise and fall in the vertical direction, so as to come into contact with or detach from the contact line surface at the same time. The control system is also electrically connected to the first lifting mechanism and the second lifting mechanism respectively. The control system can calculate the vertical adjustment value of the first lifting mechanism and the second lifting mechanism respectively according to the received voltage signal and the preset pressure-stroke relationship curve, and control the first lifting mechanism and the second lifting mechanism to perform lifting according to the corresponding vertical adjustment value, thereby realizing the active adjustment of the grinding pressure of the surface grinding unit and the grinding pressure of the two edge grinding units.

[0026] As can be seen from the above structure, according to the appendix Figure 1 It can be seen that the surface grinding unit and the two edge grinding units are all installed above the base plate 1. The surface grinding unit is used to grind the bottom surface of the contact line, and the two edge grinding units are used to grind the left and right edges of the bottom of the contact line, respectively. Each grinding unit includes a grinding head 2, a drive mechanism 3, and a displacement sensor 4. Each drive mechanism 3 is rotatably connected to the grinding head 2 of the corresponding grinding unit, driving the grinding head 2 to rotate. The displacement sensor 4 is used to monitor the lifting and lowering of the grinding head 2 of the corresponding grinding unit in real time, acquiring the corresponding voltage signal and outputting it to the control system. According to the attached... Figure 7 As shown, a is the bottom surface of the contact line, and b is the edge of the contact line.

[0027] Each surface grinding unit uses a first lifting mechanism independently. This mechanism drives the grinding head 2 of the surface grinding unit to rise and fall vertically, allowing the grinding head 2 to rotate and grind against the bottom surface of the contact line, or to separate from it. The two edge grinding units share a second lifting mechanism. This mechanism synchronously drives the two grinding heads 2 of the two edge grinding units to rise and fall vertically simultaneously, allowing them to simultaneously contact or separate from the edges on the left and right sides of the contact line. By setting up the first and second lifting mechanisms, the grinding pressure on the bottom surface of the contact line and the two edges can be adjusted according to the wear condition of different parts of the contact line, ensuring the uniformity of grinding on the two edges and the overall grinding effect. The control system is independently electrically connected to each drive mechanism 3 and each displacement sensor 4. Firstly, the control system can independently adjust the start / stop timing and grinding speed of each grinding head 2 by controlling the start / stop and rotation speed of the drive mechanism 3. Secondly, in the initial working state, the line grinding unit and the two edge grinding units will grind the bottom line edge and edge respectively according to the grinding pressure preset by the control system.

[0028] Then, the control system is electrically connected to the first lifting mechanism and the second lifting mechanism respectively. Specifically, the control system has a preset pressure-stroke relationship curve, which is used to characterize the relationship between the ideal stroke values ​​of the grinding head 2 of each grinding unit under different preset grinding pressures. The ideal stroke value is the vertical height of the grinding head 2 compared to its initial position. The control system can convert the voltage signals output by the displacement sensor 4 of the surface grinding unit and the displacement sensor 4 of the edge grinding unit into the current vertical displacement of the corresponding grinding head 2, i.e., the actual stroke value. Then, by calculating the difference between the actual stroke value and the ideal stroke value, the vertical adjustment value corresponding to the first lifting mechanism and the second lifting mechanism is obtained. Then, the first lifting mechanism and the second lifting mechanism are raised and lowered according to the corresponding vertical adjustment value, thereby adjusting the contact pressure between the grinding head 2 of the surface grinding unit and the bottom edge of the contact line, and between the grinding head 2 of the two edge grinding units and the left and right edges, thereby realizing the active adjustment of the grinding pressure. In addition, since the displacement sensor 4 can provide real-time feedback of voltage signals, this invention can actively and in real-time adjust the grinding pressure of the surface grinding unit or the edge grinding unit according to the changes in the wear condition of the contact wire surface during the grinding process. This significantly improves the grinding quality and avoids the problem of damaging the contact wire due to excessive grinding pressure or insufficient grinding of the contact wire due to insufficient grinding pressure.

[0029] It should be noted that the pressure-stroke relationship curve in this utility model is a pre-calibrated linear curve. Therefore, during the grinding process, the actual grinding pressure of the line surface grinding unit and the edge grinding unit can be read according to the actual stroke value corresponding to the line surface grinding unit or the edge grinding unit, thus enabling online measurement of grinding pressure.

[0030] Example 2: See attached Figures 1-7 Based on Embodiment 1, the drive mechanism 3 includes a first mounting base 31, a rotary motor 32, a transmission assembly 33, and an L-shaped plate 34; the grinding head 2 and the rotary motor 32 are simultaneously mounted on the upper and lower sides of the first mounting base 31; the transmission assembly 33 is used to drive the grinding head 2 and the rotary motor 32 to rotate synchronously; the rotary motor 32 is electrically connected to the control system; the first side 341 of the L-shaped plate 34 is fixedly connected to the upper part of the first mounting base 31, and the second side 342 is used to connect to the first lifting mechanism or the second lifting mechanism.

[0031] The transmission assembly 33 includes a first pulley 331, a second pulley 332, and a belt 333; the first pulley 331 and the second pulley 332 are both movably mounted on the first mounting base 31 in the front-rear direction; both ends of the first pulley 331 protrude from the first mounting base 31, and the front end is connected to the grinding head 2; both ends of the second pulley 332 protrude from the first mounting base 31, and the front end is driven by the rotary motor 32; the rear ends of the first pulley 331 and the rear ends of the second pulley 332 are connected by the belt 333.

[0032] As can be seen from the above structure, the grinding head 2 and the rotary motor 32 are respectively installed on the upper and lower sides of the first mounting base 31, and the two rotate synchronously through the transmission assembly 33. The rotary motor 32 is electrically connected to the control system, which controls its start / stop and speed to meet different grinding requirements. The first side 341 of the L-shaped plate 34 is fixedly connected to the upper part of the first mounting base 31, while the second side 342 is connected to the first or second lifting mechanism according to the corresponding grinding unit, so that the drive mechanism 3 and the grinding head 2 of the corresponding grinding unit rise and fall synchronously with the corresponding lifting mechanism. Specifically, the transmission assembly 33 is a belt drive assembly. When the rotary motor 32 starts, its power is transmitted to the grinding head 2 through the second pulley 332, the belt 333, and the first pulley 331, driving the grinding head 2 to rotate for grinding the contact line surface.

[0033] The first lifting mechanism includes a stepper motor 51, a lead screw 52, ​​a first connecting plate 53, a spring 54, and a sliding assembly. The stepper motor 51 is fixed on the base plate 1 and electrically connected to the control system. The lead screw 52 is driven and connected to the output end of the stepper motor 51. The lead screw 52 is movably inserted through the first connecting plate 53 and threadedly engaged with the first connecting plate 53. The sliding assembly includes a slider 55 and a slide rail 56. The slide rail 56 is vertically installed above the base plate 1, and the slider 55 is slidably engaged with the slide rail 56. The slider 55 is fixedly connected to the first connecting plate 53. A first horizontal plate 343 is provided on the second side 342 of the L-shaped plate 34. A second horizontal plate 531 is provided on the first connecting plate 53. The spring 54 is vertically disposed between the first horizontal plate 343 and the second horizontal plate 531.

[0034] As can be seen from the above structure, the first lifting mechanism is used to independently control the lifting and lowering of the grinding head 2 of the surface grinding unit. The stepper motor 51 is fixed to the base plate 1 and its forward and reverse rotation and step size are controlled by the control system. The output end of the stepper motor 51 is driven and connected to the lead screw 52, ​​which is movably mounted on the first connecting plate 53 and threadedly engaged with it. When the stepper motor 51 rotates forward, the lead screw 52 rotates and drives the first connecting plate 53 to rise along the axial direction of the lead screw 52; when the stepper motor 51 rotates in reverse, the first connecting plate 53 descends along the axial direction of the lead screw 52. The sliding assembly provides vertical guidance for the grinding head 2. When the lead screw 52 rotates, the first connecting plate 53 and the slider 55 rise and fall synchronously along the slide rail 56, ensuring that the first connecting plate 53 moves in a straight line vertically, preventing skew and affecting the grinding effect.

[0035] Furthermore, the drive mechanism 3 of the surface grinding unit is connected to the first lifting mechanism via an L-shaped plate 34. Specifically, a first horizontal plate 343 is provided on the second side 342 of the L-shaped plate 34, and a second horizontal plate 531 is provided on the first connecting plate 53. A spring 54 is vertically positioned between the first horizontal plate 343 and the second horizontal plate 531, allowing for an elastic connection between the L-shaped plate 34 and the first connecting plate 53. When the first connecting plate 53 rises under the drive of the stepper motor 51, the second horizontal plate 531 rises accordingly and compresses the spring 54. The spring 54 transmits the upward thrust to the L-shaped plate 34 through the first horizontal plate 343, thereby driving the drive mechanism 3 and the grinding head 2 to rise as a whole, causing the grinding head 2 to abut against the surface of the contact line.

[0036] The second lifting mechanism includes a stepper motor 51, a lead screw 52, ​​a long plate 57, two second connecting plates 58, two springs 54, and two sliding components. The stepper motor 51 is fixed to the base plate 1 and electrically connected to the control system. The lead screw 52 is movably inserted through the middle of the long plate 57 and threadedly engaged with the long plate 57. The two second connecting plates 58 are respectively connected to both ends of the long plate 57. Each sliding component includes a slider 55 and a slide rail 56, and the two sliding components correspond one-to-one with the two edge grinding units. The slide rail 56 is vertically installed above the base plate 1, and the slider 55 is slidably engaged with the slide rail 56. Each slider 55 is fixedly connected to a second connecting plate 58. A first horizontal plate 343 is provided on the second side 342 corresponding to the two edge grinding units. A third horizontal plate 581 is provided on each second connecting plate 58. Each spring 54 is vertically arranged between the first horizontal plate 343 and the third horizontal plate 581.

[0037] As can be seen from the above structure, the stepper motor 51 of the second lifting mechanism is also fixed on the base plate 1 and electrically connected to the control system. The second lifting mechanism uses a lead screw 52 to simultaneously control the lifting and lowering of the grinding heads 2 of the two edge grinding units, which reduces product costs. Two sliding components and two second connecting plates 58 correspond one-to-one with the two edge grinding units, and the two second connecting plates 58 are connected to both ends of the long plate 57. When the stepper motor 51 drives the lead screw 52 to rotate, it causes the long plate 57 to rise and fall along the axial direction of the lead screw 52. At this time, the two second connecting plates 58 simultaneously drive the two edge grinding units to rise and fall synchronously vertically, causing the grinding heads 2 of the two edge grinding units to simultaneously abut or disengage from the edges on the left and right sides of the bottom of the contact line. Each spring 54 is vertically positioned between the corresponding first horizontal plate 343 and third horizontal plate 581, providing clamping force for each of the two edge grinding units.

[0038] However, in actual grinding, the wear conditions of the edges on the left and right sides of the contact line are not necessarily the same, resulting in differences in the actual grinding pressure generated on both sides. In this invention, the lifting height adjustment of the two edge grinding units is synchronized according to the grinding unit with the larger displacement, ensuring effective grinding of that side. Furthermore, the spring 54 itself acts as an elastic buffer element, which can slightly retract downwards when the grinding heads 2 of the line grinding unit and the two edge grinding units encounter a protrusion on the contact line surface, and can return to its original position after passing the protrusion. This can balance the grinding pressure on the two edges to a certain extent, further ensuring grinding uniformity.

[0039] It should be noted that, depending on the actual working conditions or grinding requirements, the two edge grinding units can also adopt an independent control form, such as the line and surface grinding unit, to individually adjust the grinding pressure of the corresponding grinding head 2.

[0040] The long plate 57 has a waist-shaped through hole at each end; a connecting bolt is provided below the second connecting plate 58; the connecting bolt is movably fitted into the waist-shaped through hole. As can be seen from the above structure, considering that the wear conditions of the left and right edges of the contact line are not necessarily the same, the connection method between the long plate 57 and the two second connecting plates 58 can be further improved. By vertically opening a waist-shaped through hole at each end of the long plate 57, and providing a connecting bolt that can movably fit into the waist-shaped through hole below each second connecting plate 58, the long plate 57 can swing to a certain extent relative to the two second connecting plates 58 during the lifting and lowering process, further fine-tuning the grinding pressure on the two edges.

[0041] Specifically, when the wear degree of the two contact line edges is inconsistent, resulting in different compression of the two springs 54, the long plate 57 can create a height difference of about 2mm to 3mm between the two edge grinding units through the space between the waist-shaped through hole and the connecting bolt. This allows the grinding heads 2 located on both sides of the contact line to maintain effective contact at the uneven wear area on the contact line surface, avoiding excessive pressure on one side of the edge due to mismatched grinding pressure. This controls the difference in grinding pressure between the two edge grinding units within a reasonable range, further improving the uniformity of grinding the two edges and ensuring grinding quality.

[0042] The displacement sensor 4 is a potentiometer; the potentiometer is installed on the side wall of the second side 342 away from the spring 54. As can be seen from the above structure, the potentiometer is an existing product. The potentiometer has a sliding contact that is in active contact with the first connecting plate 53 or the second connecting plate 58. When the grinding head 2 rises and falls, causing the spring 54 to compress or extend, the first connecting plate 53 or the second connecting plate 58 will generate a vertical displacement relative to the L-shaped plate 34, thereby driving the sliding contact of the potentiometer to move synchronously, changing the effective resistance value of the circuit connected to the potentiometer. The potentiometer collects the resistance value in real time and converts it into a voltage signal to be output to the control system, so that the control system can convert it into the actual stroke value of the corresponding grinding unit's rise and fall.

[0043] Example 3: See attached Figures 1-7Based on Embodiment 2, three position sensors 6 are also included. These three position sensors 6 are used to monitor whether the vertical position of the surface grinding unit and the vertical position of the two edge grinding units are at their initial positions before or after grinding begins. As can be seen from the above structure, the base plate 1 can also be provided with multiple vertically extending ribs 11, which can be specifically located near the surface grinding unit or the edge grinding unit. The position sensors 6 are installed on these ribs 11, ensuring that one of the surface grinding unit and one of the two edge grinding units is within its detection range. The position sensors 6 are used to monitor the lifting and lowering of the corresponding surface grinding unit or edge grinding unit before or after the grinding device begins operation, confirming whether its vertical position is at the preset initial position, to ensure that the stroke starting point of each grinding operation remains consistent. Specifically, the position sensors 6 can be photoelectric sensors.

[0044] The surface grinding unit and the two edge grinding units are arranged sequentially along the length of the base plate 1, with the two edge grinding units facing each other. From the above structure, it can be seen that, according to the attached... Figure 2 It can be seen that the surface grinding unit and the two edge grinding units are arranged in a row along the length of the base plate 1, consistent with the extension direction of the contact line. Among them, the surface grinding unit is located on the left side of the base plate 1, and its grinding head 2 is used to align with the bottom surface of the contact line. The two edge grinding units are located on the right side of the surface grinding unit and are spaced apart, so that the two grinding heads 2 are respectively aligned with the left and right edges of the bottom of the contact line.

[0045] It should be noted that since the grinding head 2 of the line surface grinding unit is used to grind the bottom line surface of the contact line, which is parallel to the horizontal plane, the grinding head 2 of the line surface grinding unit does not need to be adjusted in angle and always maintains a horizontal posture. However, the two edge grinding units require the grinding head 2 to be tilted for grinding; therefore, an additional angle adjustment structure can be set to adjust its pitch posture to meet the grinding requirements, as shown in the attached figure. Figure 6 As shown, the grinding head 2 of the edge grinding unit has an upward tilt angle compared to the grinding head 2 of the line surface grinding unit. Since the angle adjustment structure is existing technology and not related to the improvements of this utility model, it will not be described further here.

[0046] It also includes a traveling mechanism 7; the traveling mechanism 7 is mounted on the base plate 1; the traveling mechanism 7 is used to be assembled on the busbar 0 and moves along the length direction of the busbar 0. From the above structure, it can be seen that, according to the attached... Figure 1 It can be seen that the walking mechanism 7 is used to drive the base plate 1 and the line surface grinding unit and the two edge grinding units installed on it to move synchronously along the busbar 0, so that the grinding heads 2 corresponding to the line surface grinding unit and the two edge grinding units can continuously grind the surface of the contact line along the length of the contact line.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A pressure-adjustable rigid contact wire grinding device, characterized in that: Includes a control system, a base plate (1), a surface grinding unit, and two edge grinding units; The surface grinding unit and the two edge grinding units are all installed above the base plate (1); each surface grinding unit and each edge grinding unit includes a grinding head (2), a drive mechanism (3) and a displacement sensor (4); each drive mechanism (3) is connected to the corresponding grinding head (2) for rotational drive; each displacement sensor (4) acquires a voltage signal in real time according to the lifting and lowering of the corresponding grinding head (2) and outputs it to the control system; each drive mechanism (3) and each displacement sensor (4) are independently electrically connected to the control system; It also includes a first lifting mechanism and a second lifting mechanism; the first lifting mechanism is used to drive the grinding head (2) of the line surface grinding unit to rise and fall independently in the vertical direction so as to come into contact with or detach from the contact line surface; the second lifting mechanism is used to synchronously drive the grinding heads (2) of the two edge grinding units to rise and fall in the vertical direction so as to come into contact with or detach from the contact line surface at the same time. The control system is also electrically connected to the first lifting mechanism and the second lifting mechanism respectively. The control system can calculate the vertical adjustment value of the first lifting mechanism and the second lifting mechanism respectively according to the received voltage signal and the preset pressure-stroke relationship curve, and control the first lifting mechanism and the second lifting mechanism to perform lifting according to the corresponding vertical adjustment value, thereby realizing the active adjustment of the grinding pressure of the surface grinding unit and the grinding pressure of the two edge grinding units.

2. The rigid contact wire grinding device according to claim 1, characterized in that: The drive mechanism (3) includes a first mounting base (31), a rotary motor (32), a transmission assembly (33), and an L-shaped plate (34); the grinding head (2) and the rotary motor (32) are simultaneously mounted on the upper and lower sides of the first mounting base (31); the transmission assembly (33) is used to drive the grinding head (2) and the rotary motor (32) to rotate synchronously; the rotary motor (32) is electrically connected to the control system; the first side (341) of the L-shaped plate (34) is fixedly connected to the upper part of the first mounting base (31), and the second side (342) is used to connect to the first lifting mechanism or the second lifting mechanism.

3. The rigid contact wire grinding device according to claim 2, characterized in that: The transmission assembly (33) includes a first pulley (331), a second pulley (332), and a belt (333); the first pulley (331) and the second pulley (332) are both movably mounted on the first mounting base (31) in the front-rear direction; the first pulley (331) extends out of the first mounting base (31) at both ends, and its front end is connected to the grinding head (2); the second pulley (332) extends out of the first mounting base (31) at both ends, and its front end is driven by the rotary motor (32); the rear ends of the first pulley (331) and the rear ends of the second pulley (332) are connected by the belt (333).

4. The rigid contact wire grinding device according to claim 2, characterized in that: The first lifting mechanism includes a stepper motor (51), a lead screw (52), a first connecting plate (53), a spring (54), and a sliding assembly; the stepper motor (51) is fixed on the base plate (1) and electrically connected to the control system; the lead screw (52) is driven and connected to the output end of the stepper motor (51); the lead screw (52) is movably inserted through the first connecting plate (53) and threadedly engaged with the first connecting plate (53); the sliding assembly includes a slider (55) and a slide rail (56); the slide rail (56) is vertically installed above the base plate (1), and the slider (55) is slidably engaged with the slide rail (56); the slider (55) is fixedly connected to the first connecting plate (53); a first horizontal plate (343) is provided on the second side (342) of the L-shaped plate (34); a second horizontal plate (531) is provided on the first connecting plate (53); the spring (54) is vertically arranged between the first horizontal plate (343) and the second horizontal plate (531).

5. The rigid contact wire grinding device according to claim 2, characterized in that: The second lifting mechanism includes a stepper motor (51), a lead screw (52), a long plate (57), two second connecting plates (58), two springs (54), and two sliding components; the stepper motor (51) is fixed on the base plate (1) and electrically connected to the control system; the lead screw (52) is movably inserted through the middle of the long plate (57) and threaded into the long plate (57); the two second connecting plates (58) are respectively connected to both ends of the long plate (57); each sliding component includes a slider (55) and a slide rail (56), and the two sliding components... Each component corresponds to one of the two edge grinding units; the slide rail (56) is vertically installed above the base plate (1), and the slider (55) slides on the slide rail (56); each slider (55) is fixedly connected to a second connecting plate (58); a first horizontal plate (343) is provided on the second side (342) corresponding to the two edge grinding units; a third horizontal plate (581) is provided on each second connecting plate (58); each spring (54) is vertically arranged between the first horizontal plate (343) and the third horizontal plate (581).

6. The rigid contact wire grinding device according to claim 5, characterized in that: The long plate (57) has a waist-shaped through hole at each end; the second connecting plate (58) has a connecting bolt below it; the connecting bolt is movably fitted in the waist-shaped through hole.

7. The rigid contact wire grinding device according to claim 2, characterized in that: The displacement sensor (4) is a potentiometer; the potentiometer is installed on the side wall of the second side (342) away from the spring (54).

8. The rigid contact wire grinding device according to claim 4, characterized in that: It also includes three position sensors (6); the three position sensors (6) are used to monitor whether the vertical position of the line surface grinding unit and the vertical position of the two edge grinding units are the initial positions before grinding begins or after grinding ends.

9. The rigid contact wire grinding device according to claim 1, characterized in that: The surface grinding unit and the two edge grinding units are arranged sequentially along the length of the base plate (1), and the two edge grinding units are arranged opposite each other.

10. The rigid contact wire grinding device according to claim 1, characterized in that: It also includes a walking mechanism (7); the walking mechanism (7) is mounted on the base plate (1); the walking mechanism (7) is used to be mounted on the busbar (0) and move along the length of the busbar (0).

Images