An emergency brake device for overhead crane gantry linear motor

Abstract

The present invention relates to the field of linear motor braking technology, specifically an emergency braking device for a gantry linear motor, comprising two X-axes, an X-axis motor, an X-axis guide rail, a Y-axis, a Y-axis motor, a slide, a Y-axis guide rail and a slide plate, wherein the number of the X-axis motors is two and they are fixedly mounted in the middle of the top surfaces of the two X-axes, the number of the X-axis guide rails is four, and the four X-axis guide rails are divided into two groups with two as a group, and each group of the X-axis guide rails is fixedly mounted on the left and right sides of the top of the X-axis. The present invention adds four braking measures, namely, deceleration switch braking, limit switch braking, mechanical brake braking, and mechanical buffer device braking. In an emergency situation where the system fails or the power is suddenly cut off, even if one of the braking measures fails, the emergency braking of the linear motor can be achieved through other effective braking measures, thereby providing multiple guarantees for the emergency braking of the linear motor under abnormal circumstances.

Description

Technical Field

[0001] The invention relates to the technical field of linear motor braking, in particular to an emergency braking device for a linear motor of a crane gantry. Background Art

[0002] The transmission modes of the linear axis of the overhead crane gantry machine tool are mostly screw transmission, gear rack transmission, linear motor transmission, etc., and linear motors have become the first choice of many users because of their advantages such as no wear, zero backlash, high efficiency and high precision. Linear motors are mainly composed of primary components and secondary components. When powered on, the secondary components of the linear motor are fixed, and the primary components perform relative linear motion under the action of the generated electromagnetic thrust, but there is no constraint between the primary components and the secondary components, and the movement speed and acceleration are large. In the event of an unexpected failure of the system or a sudden power outage, the primary components will continue to move due to inertia, posing a very large safety hazard. Therefore, corresponding safety measures must be taken to ensure that the linear motor can brake instantly to ensure the safety of the machine tool.

[0003] At present, overhead crane gantry machine tools usually use linear motors to drive the X and Y horizontal axes, and a lead screw dual-drive transmission for the Z vertical axis. The existing technology for braking the X and Y axis linear motors generally uses two methods: 1. Using the energy of the DC bus for braking, that is, relying on the system to issue instructions to brake the linear motor; 2. Mechanical braking through braking elements, fixing nylon anti-collision blocks on both sides of the left and right slides and both sides of the slide seat. If the X and Y axis linear motors run beyond the effective stroke, it will eventually cause the left and right slides or the slide seat to collide with the nylon blocks, thereby stopping the linear motor.

[0004] However, the above method has the following defects: using the energy of the DC bus for braking, if the system fails or there is a power outage, this braking function will not be realized, and the braking effect is not reliable enough; at the same time, using the nylon anti-collision block for braking, the linear motor can only stop when it runs to the position of the nylon anti-collision block, and it cannot achieve instant braking at other positions. In addition, the kinetic energy of the linear motor is huge when running at high speed, and a large vibration will be generated after the collision, which is likely to damage important components such as the spindle, tool, linear motor, etc., causing irreparable losses. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] The present invention is aimed at the above defects existing in the prior art, and specially proposes an emergency brake device for a gantry linear motor of a crane, which solves the problem in the prior art that the linear motor cannot effectively perform emergency braking when a system failure or power failure occurs.

[0007] 2. Technical Solution

[0008] In order to solve the above technical problems, the present invention provides an emergency brake device for a gantry linear motor of a crane, comprising two X-axes, an X-axis motor, an X-axis guide rail, a Y-axis, a Y-axis motor, a slide seat, a Y-axis guide rail and a slide plate, wherein the number of the X-axis motors is two and they are respectively fixedly installed in the middle of the top surfaces of the two X-axes, the number of the X-axis guide rails is four, the four X-axis guide rails are divided into two groups with two as a group, and each group of the X-axis guide rails is respectively fixedly installed on the left and right sides of the top of the X-axis, the slide plate is fixedly installed on the top of the X-axis motor, the Y-axis is fixedly installed on the top of the slide plate, the Y-axis motor is fixedly installed on the front side of the Y-axis, the Y-axis guide rail is fixedly installed on the front side of the top of the Y-axis, the slide seat is fixedly installed on the front side of the Y-axis motor, the bottom of the primary components of the X-axis motor and the Y-axis motor are both fixedly installed with a slide block, the slide block is movably clamped on the outer surface of the X-axis guide rail, the top of the X-axis motor and the front of the Y-axis are both fixedly installed with a fixed block, the top of the right side of the X-axis is provided with an X-axis slot plate fixing frame, and the top of the X-axis slot plate fixing frame is fixedly installed with an X-axis The top of the X-axis slot plate is provided with an X-axis limit bumper and an X-axis deceleration bumper, the front right side of the Y-axis is fixedly installed with an X-axis switch fixing frame, the right side of the X-axis switch fixing frame is provided with an X-axis limit contact and an X-axis deceleration contact, the top of the Y-axis is provided with a Y-axis slot plate, the top of the Y-axis slot plate is fixedly installed with a Y-axis limit bumper and a Y-axis deceleration bumper, the back of the slide is fixedly installed with a Y-axis switch fixing frame, the front of the Y-axis switch fixing frame is fixedly installed with a Y-axis double-contact travel switch, and the Y-axis double-contact The bottom of the point travel switch is fixedly installed with a Y-axis deceleration contact and a Y-axis limit contact, the middle of the X-axis guide rail and the Y-axis guide rail are both provided with a clamp, and the interior of the fixed block is provided with a hydraulic buffer. The X-axis motor and the Y-axis motor are both linear motors. The four braking methods of deceleration switch braking, limit switch braking, mechanical brake braking, and mechanical buffer device braking provide multiple insurances for emergency braking of the linear motor under abnormal circumstances. Regardless of whether the power is off or not, the mechanical brake will be activated under the action of the clamp to maintain the safety of the equipment.

[0009] Preferably, an X-axis double-contact travel switch is fixedly installed on the front of the X-axis switch fixing frame, and the X-axis deceleration contact is fixedly installed on the right side of the bottom of the X-axis double-contact travel switch, and the X-axis, X-axis motor, X-axis guide rail, Y-axis, Y-axis motor, slide seat, slider, X-axis slot plate fixing frame, X-axis slot plate, X-axis deceleration block, Y-axis guide rail, X-axis switch fixing frame, X-axis double-contact travel switch, X-axis deceleration contact, Y-axis slot plate, Y-axis deceleration block, Y-axis switch fixing frame The frame, Y-axis double-contact stroke switch and Y-axis deceleration contact constitute a deceleration switch braking mechanism, the X-axis motor, X-axis guide rail, slider, X-axis slot plate fixing frame, X-axis slot plate, X-axis deceleration block, X-axis switch fixing frame, X-axis double-contact stroke switch and X-axis deceleration contact constitute a deceleration switch braking module in the X-axis direction, the Y-axis, Y-axis motor, slide, Y-axis guide rail, Y-axis slot plate, Y-axis deceleration block, Y-axis switch fixing frame, Y-axis double-contact stroke switch and Y-axis The deceleration contacts constitute the deceleration switch brake module in the Y-axis direction, the X-axis slot plate fixing frame is fixedly installed on the front side of the top of the right X-axis, the X-axis deceleration bumper is fixedly installed on the rear side of the top of the X-axis slot plate, and a high-sensitivity X-axis double-contact travel switch and a Y-axis double-contact travel switch are installed on the Y-axis, and the X-axis deceleration contact and the Y-axis deceleration contact are respectively used to realize the axial deceleration function, and the X-axis deceleration bumper and the Y-axis deceleration bumper for deceleration are arranged at a position 125mm away from the end of the stroke. When there is electricity, if the axial movement speed exceeds the set value, and the X-axis deceleration contact and the Y-axis deceleration contact are pressed in by the X-axis deceleration bumper and the Y-axis deceleration bumper respectively, a signal will be fed back to the PLC, requiring the X-axis motor or the Y-axis motor to start decelerating, otherwise it will not be able to stop completely within the remaining stroke range. The deceleration function is still effective when a system failure occurs, which greatly reduces the risk of the linear motor rushing out.

[0010] Preferably, an X-axis double-contact travel switch is fixedly installed on the front of the X-axis switch fixing frame, and the X-axis deceleration contact is fixedly installed on the right side of the bottom of the X-axis double-contact travel switch. The X-axis, X-axis motor, X-axis guide rail, Y-axis, Y-axis motor, slide seat, clamp, slider, X-axis slot plate fixing frame, X-axis slot plate, X-axis limit bumper, Y-axis guide rail, X-axis switch fixing frame, X-axis double-contact travel switch, X-axis limit contact, Y-axis slot plate, Y-axis limit bumper, Y-axis switch fixing frame, Y-axis double-contact travel switch and Y-axis limit contact constitute a limit switch braking mechanism, and the X-axis motor, X-axis guide rail, slider, X-axis slot plate fixing frame, X-axis slot plate, X-axis limit bumper, X-axis switch fixing frame, clamp, X-axis double-contact travel switch and X-axis limit contact constitute a limit switch braking mechanism. The limit contacts constitute the limit switch brake module in the X-axis direction, and the Y-axis, Y-axis motor, slide, Y-axis guide rail, Y-axis slot plate, Y-axis limit bumper, Y-axis switch fixing frame, clamp, Y-axis double-contact travel switch and Y-axis limit contacts constitute the deceleration switch brake module in the Y-axis direction. The X-axis limit contacts and Y-axis limit contacts are used to realize the axial limit function. The X-axis limit bumper and Y-axis limit bumper used for limiting are arranged at a position 5mm beyond the set stroke. When there is electricity, if the deceleration switch brake fails, the linear motor may not be able to be completely braked within the set stroke. At this time, the X-axis limit contacts and Y-axis limit contacts will be pressed in by the X-axis limit bumper and the Y-axis limit bumper respectively, and a signal will be fed back to the PLC to brake the linear motor. At this time, the pneumatic solenoid valve controlling the clamp will also be powered off and the air will be cut off. The X-axis guide or Y-axis guide will be clamped by the force of the internal spring of the clamp, so that the linear motor can be braked instantly. This limit function is still valid in the event of a system failure.

[0011] Preferably, the X-axis, X-axis motor, X-axis guide rail, Y-axis, Y-axis motor, slide, clamp and slider constitute a mechanical brake mechanism, the clamp is movably installed on the X-axis guide rail and the Y-axis guide rail, the clamp is located between the slider, and the X-axis guide rail and the Y-axis guide rail are respectively installed with clamps, and the clamp is of pneumatic normally closed type, which is closed normally. The specific brake force is determined by the driving force of the linear motor. When there is electricity, the pneumatic solenoid valve is energized to supply compressed air to the clamp, and the clamp is released. Except for the clamping state, the axial direction can run freely. When a system failure occurs, the PLC will require the pneumatic solenoid valve controlling the clamp to be powered off. At this time, the compressed air supplied to the clamp is interrupted. With the help of the force of the internal spring of the clamp, the X-axis guide or the Y-axis guide can be clamped, and finally the left and right slides and the slide seat are braked instantly. In the case of a sudden power failure, the solenoid valve will also be powered off and the air will be cut off. The clamp will clamp the X-axis guide or the Y-axis guide and then brake. In addition, the clamp is arranged in the middle part of the slider and will not occupy the axial travel position.

[0012] Preferably, the oil pressure buffer comprises an oil column, a telescopic column is movably sleeved inside the oil column, a top block is fixedly installed at the other end of the telescopic column, a return spring is movably sleeved on the outer surface of the telescopic column, both ends of the return spring are respectively fixedly connected to the oil column and the top block, the oil column is fixedly installed inside the fixed block, and oil pressure buffers are respectively installed at both ends of the X-axis and the Y-axis. The buffer adopts a multi-hole throttling design, which can generate huge damping and absorb the kinetic energy brought by the high-speed movement of the left and right sliders and the slide seat. When the DC bus energy braking, deceleration switch braking, limit switch braking, and mechanical brake braking all fail, the energy of the high-speed moving parts is completely absorbed by the oil pressure buffer, and finally the parts are stopped. Since the braking process has strong buffering, no vibration will be generated and no damage will be caused to the parts.

[0013] Preferably, the number of the sliders is fourteen, two of the sliders are movably clamped on the left and right sides of the top of the Y-axis guide rail, and the remaining twelve clamps are divided into four groups of three and are respectively located at the top of each X-axis guide rail. Each group of sliders is distributed at the top of each X-axis guide rail in the form of two in front and one in the back. The number of the clamps is five, one clamp is located at the top of the Y-axis guide rail and between the two sliders on the Y-axis guide, and the remaining four clamps are respectively located at the top of each X-axis guide rail and between the three sliders on each X-axis guide. The clamps are located between the sliders, and the moving slider moves axially. Once the system fails, the slider will clamp the X-axis guide or the Y-axis guide, causing the linear motor to brake instantly.

[0014] Preferably, the clamp will cut off power and air when power is off or a fault occurs and can instantly clamp the X-axis guide rail. The clamp is movably connected to the outer surfaces of the X-axis guide rail and the Y-axis guide rail. After the clamp clamps the X-axis guide rail, the linear motor will be braked instantly to prevent the linear motor from flying out. The clamp is movably connected to the outer surfaces of the X-axis guide rail and the Y-axis guide rail, and can move with the movement of the slider without affecting the normal movement of the linear motor.

[0015] Preferably, there are two Y-axis slot plates and they are respectively distributed on the left and right sides of the top of the Y-axis. The center plane of the Y-axis slot plate and the center plane of the Y-axis double-contact travel switch are in the same plane. The Y-axis slot plates are distributed on the left and right sides of the top of the Y-axis, which can facilitate the Y-axis double-contact travel switch to drive the Y-axis deceleration contact and the Y-axis limit contact to contact it. When the Y-axis double-contact travel switch is driven to the top of the Y-axis slot plate, it will press the Y-axis deceleration contact and the Y-axis limit contact and enter the interior of the Y-axis double-contact travel switch, thereby controlling the PLC and braking the linear motor.

[0016] Preferably, the number of the oil pressure buffers is six, and the six oil pressure buffers are divided into three groups with two in each group and are respectively distributed on the two X axes and the Y axis. Each group of oil pressure buffers is distributed at both ends of the X axis or the X axis motor. When the Y axis or the slide seat performs extreme axial movement, it will touch the oil pressure buffer and be stopped by the powerful damping force of the oil pressure buffer, thereby achieving the purpose of buffer braking.

[0017] 3. Beneficial Effects

[0018] Compared with the prior art, the present invention realizes the function of emergency braking by providing a deceleration switch braking mechanism, a limit switch braking mechanism, a mechanical brake braking mechanism and a mechanical buffer device braking mechanism, etc., and realizes mechanical and electrical dual insurance. By providing an X-axis double-contact travel switch to drive the X-axis limit contact and the X-axis deceleration contact, the deceleration switch braking and the limit switch braking in the X-axis direction are realized under the cooperation of the X-axis limit bumper and the X-axis deceleration bumper. By providing a Y-axis double-contact travel switch to drive the Y-axis deceleration contact and the Y-axis limit contact, the deceleration switch braking and the limit switch braking in the Y-axis direction are realized under the cooperation of the Y-axis limit bumper and the Y-axis deceleration bumper.

[0019] By providing a clamp, when a system failure occurs, the clamp is controlled by PLC to clamp the X-axis guide rail or the Y-axis guide rail, so that the left and right slides and the slide seat are braked instantly. By providing an oil pressure buffer, its multi-hole throttling design produces huge damping, absorbing the energy of the left and right slides and the slide seat moving at high speed, and realizing buffer braking. Through the strong buffering effect, the vibration of the slide and the slide seat during the braking process is avoided, and damage to the components is avoided;

[0020] The present invention also adds four braking measures, namely, deceleration switch braking, limit switch braking, mechanical brake braking, and mechanical buffer device braking. In the event of an emergency situation where the system fails or there is a sudden power outage, even if one of the braking measures fails, emergency braking of the linear motor can be achieved through other effective braking measures, thereby providing multiple guarantees for the emergency braking of the linear motor under abnormal circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the front appearance of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the back appearance of the structure of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the braking mechanism of the mechanical buffer device of the present invention;

[0024] Figure 4 It is a schematic diagram of the separation of the X-axis and the clamp of the present invention;

[0025] Figure 5 It is a schematic diagram of the separation of the X-axis and the back side of the clamp of the present invention;

[0026] Figure 6 It is a schematic diagram of the separation of the fixed block and the oil pressure buffer of the present invention;

[0027] Figure 7 For the present invention Figure 1 A magnified schematic diagram of the structure at center A;

[0028] Figure 8 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the figure.

[0029] In the figure: 1, X-axis; 2, X-axis motor; 3, X-axis guide; 4, Y-axis; 5, Y-axis motor; 6, slide; 7, X-axis slot plate fixing frame; 8, X-axis slot plate; 9, X-axis limit bumper; 10, X-axis deceleration bumper; 11, Y-axis guide; 12, X-axis switch fixing frame; 13, X-axis double-contact travel switch; 14, X-axis limit contact; 15, X-axis deceleration contact; 16, Y-axis slot plate; 17, Y-axis limit bumper; 18, Y-axis deceleration bumper; 19, Y-axis switch fixing frame; 20, Y-axis double-contact travel switch; 21, Y-axis deceleration contact; 22, Y-axis limit contact; 23, fixing block; 24, oil pressure buffer; 241, oil column; 242, telescopic column; 243, top block; 244, reset spring; 25, clamp; 26, slider; 27, slide plate. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] Embodiment 1:

[0032] like Figure 1-8As shown, the embodiment provides an emergency brake device for a gantry linear motor, comprising two X-axes 1, an X-axis motor 2, an X-axis guide rail 3, a Y-axis 4, a Y-axis motor 5, a slide 6, a Y-axis guide rail 11 and a slide plate 27. The number of X-axis motors 2 is two and they are fixedly mounted on the middle of the top surface of the two X-axes 1, respectively. The number of X-axis guide rails 3 is four, and the four X-axis guide rails 3 are divided into two groups with two as a group, and each group of X-axis guide rails 3 is fixedly mounted on the left and right sides of the top of the X-axis 1, respectively. The slide plate 27 is fixedly mounted on the top of the X-axis motor 2, the Y-axis 4 is fixedly mounted on the top of the slide plate 27, and the Y-axis motor 5 is fixedly mounted on the front of the Y-axis 4, the Y-axis guide rail 11 is fixedly mounted on the front side of the top of the Y-axis 4, the slide 6 is fixedly mounted on the front of the Y-axis motor 5, the bottom of the primary components of the X-axis motor 2 and the Y-axis motor 5 are fixedly mounted with a slider 26, the slider 26 is movably connected to the outer surface of the X-axis guide rail 3, each X-axis 1 is provided with 6 sliders 26, and the Y-axis 4 is provided with 6 sliders 26, the top of the X-axis motor 2 and the front of the Y-axis 4 are fixedly mounted with a fixed block 23, the top of the right X-axis 1 is provided with an X-axis slot plate fixing frame 7, the top of the X-axis slot plate fixing frame 7 is fixedly mounted with an X-axis slot plate 8, and the X-axis slot plate 8 An X-axis limit bumper 9 and an X-axis deceleration bumper 10 are arranged on the top of the slide 6, an X-axis switch fixing frame 12 is fixedly installed on the right side of the front of the Y-axis 4, an X-axis limit contact 14 and an X-axis deceleration contact 15 are arranged on the right side of the X-axis switch fixing frame 12, a Y-axis slot plate 16 is arranged on the top of the Y-axis 4, a Y-axis limit bumper 17 and a Y-axis deceleration bumper 18 are fixedly installed on the top of the Y-axis slot plate 16, a Y-axis switch fixing frame 19 is fixedly installed on the back of the slide 6, a Y-axis double-contact travel switch 20 is fixedly installed on the front of the Y-axis switch fixing frame 19, and a Y-axis deceleration contact 18 is fixedly installed on the bottom of the Y-axis double-contact travel switch 20. Speed ​​contact 21 and Y-axis limit contact 22, a clamp 25 is provided in the middle of any X-axis guide rail 3 of each X-axis 1, a clamp 25 is provided in the middle of any Y-axis guide rail 11 on the Y-axis 4, an oil pressure buffer 24 is provided inside the fixed block 23, the X-axis motor 2 and the Y-axis motor 5 are both linear motors, and the four braking methods of deceleration switch braking, limit switch braking, mechanical brake braking, and mechanical buffer device braking provide multiple insurances for emergency braking of the linear motor under abnormal circumstances. Regardless of whether the power is off, the mechanical brake will be activated under the action of the clamp 25 to maintain the safety of the equipment.

[0033] There are two Y-axis slot plates 16 and they are respectively distributed on the left and right sides of the top of the Y-axis 4. The center plane of the Y-axis slot plate 16 and the center plane of the Y-axis double-contact travel switch 20 are in the same plane. The Y-axis slot plates 16 are distributed on the left and right sides of the top of the Y-axis 4 to facilitate the Y-axis double-contact travel switch 20 to drive the Y-axis deceleration contact 21 and the Y-axis limit contact 22 to contact it. When the Y-axis double-contact travel switch 20 is driven to the top of the Y-axis slot plate 16, it will press the Y-axis deceleration contact 21 and the Y-axis limit contact 22 and enter the interior of the Y-axis double-contact travel switch 20, thereby controlling the PLC and then braking the linear motor.

[0034] There are six oil pressure buffers 24, which are divided into three groups of two each and are respectively distributed on the two X-axes 1 and the Y-axis 4. Each group of oil pressure buffers 24 is distributed at both ends of the X-axis 1 or the X-axis motor 2. When the Y-axis 4 or the slide 6 performs extreme axial movement, it will touch the oil pressure buffer 24 and be stopped by the powerful damping force of the oil pressure buffer 24, thereby achieving the purpose of buffer braking.

[0035] Embodiment 2:

[0036] Compared with Example 1, as shown in FIG. Figure 1 , 2, 7 and 8, this embodiment provides an embodiment: an X-axis double-contact travel switch 13 is fixedly installed on the front of the X-axis switch fixing frame 12, and the X-axis deceleration contact 15 is fixedly installed on the right side of the bottom of the X-axis double-contact travel switch 13, X-axis 1, X-axis motor 2, X-axis guide rail 3, Y-axis 4, Y-axis motor 5, slide seat 6, slide block 26, X-axis slot plate fixing frame 7, X-axis slot plate 8, X-axis deceleration collision block 10, Y-axis guide rail 11, X-axis switch fixing frame 12, X-axis double-contact travel switch 13, X-axis deceleration contact 15, Y-axis slot plate 16, Y-axis deceleration block 18, Y-axis switch fixing frame 19, Y-axis double-contact travel switch 20 and Y-axis deceleration contact 21 constitute the deceleration switch braking mechanism, X-axis motor 2, X-axis guide rail 3, slider 26, X-axis slot plate fixing frame 7, X-axis slot plate 8, X-axis deceleration block 10, X-axis switch fixing frame 12, X-axis double-contact travel switch 13 and X-axis deceleration contact 15 constitute the deceleration switch braking module in the X-axis direction, Y-axis 4, Y-axis motor 5, slide seat 6, Y-axis guide rail 11, Y-axis slot plate 16, Y-axis deceleration block 18, Y-axis The switch fixing frame 19, the Y-axis double-contact travel switch 20 and the Y-axis deceleration contact 21 constitute the deceleration switch brake module in the Y-axis direction. The X-axis slot plate fixing frame 7 is fixedly installed on the front side of the top of the right X-axis 1, and the X-axis deceleration collision block 10 is fixedly installed on the rear side of the top of the X-axis slot plate 8. A high-sensitivity X-axis double-contact travel switch 13 and a Y-axis double-contact travel switch 20 are installed on the Y-axis 4. The X-axis deceleration contact 15 and the Y-axis deceleration contact 21 are respectively used to realize the axial deceleration function. The X-axis deceleration collision block 10 and The Y-axis deceleration block 18 is arranged at a position 125mm away from the end of the stroke. When there is electricity, if the axial movement speed exceeds the set value, and the X-axis deceleration contact 15 and the Y-axis deceleration contact 21 are pressed in by the X-axis deceleration block 10 and the Y-axis deceleration block 18 respectively, a signal will be fed back to the PLC, requiring the X-axis motor 2 or the Y-axis motor 5 to start decelerating, otherwise it will not be able to stop completely within the remaining stroke range. The deceleration function is still effective in the event of a system failure, which greatly reduces the risk of the linear motor rushing out.

[0037] Embodiment 3:

[0038] Compared with Example 1, in this embodiment, an X-axis double-contact travel switch 13 is fixedly installed on the front of the X-axis switch fixing frame 12, and an X-axis deceleration contact 15 is fixedly installed on the right side of the bottom of the X-axis double-contact travel switch 13. The X-axis 1, the X-axis motor 2, the X-axis guide rail 3, the Y-axis 4, the Y-axis motor 5, the slide seat 6, the clamp 25, the slider 26, the X-axis slot plate fixing frame 7, the X-axis slot plate 8, the X-axis limit block 9, the Y-axis guide rail 11, the X-axis The switch fixing frame 12, the X-axis double-contact travel switch 13, the X-axis limit contact 14, the Y-axis slot plate 16, the Y-axis limit bumper 17, the Y-axis switch fixing frame 19, the Y-axis double-contact travel switch 20 and the Y-axis limit contact 22 constitute the limit switch braking mechanism, the X-axis motor 2, the X-axis guide rail 3, the slider 26, the X-axis slot plate fixing frame 7, the X-axis slot plate 8, the X-axis limit bumper 9, the X-axis switch fixing frame 12, the clamp 25, the X-axis double The contact travel switch 13 and the X-axis limit contact 14 constitute the limit switch braking module in the X-axis direction, and the Y-axis 4, the Y-axis motor 5, the slide 6, the Y-axis guide rail 11, the Y-axis slot plate 16, the Y-axis limit bumper 17, the Y-axis switch fixing frame 19, the clamp 25, the Y-axis double-contact travel switch 20 and the Y-axis limit contact 22 constitute the deceleration switch braking module in the Y-axis direction. The X-axis limit contact 14 and the Y-axis limit contact 22 are used to realize the axial limit function. The X-axis limit bumper 9 and the Y-axis limit bumper 17 used for limiting are arranged at a position 5 mm beyond the set stroke. When there is electricity, if the deceleration switch braking fails, the linear motor may not be able to be completely braked within the set stroke. At this time, the X-axis limit contact 14 and the Y-axis limit contact 22 will be pressed in by the X-axis limit bumper 9 and the Y-axis limit bumper 17 respectively, and a signal will be fed back to the PLC to brake the linear motor. At this time, the pneumatic solenoid valve controlling the clamp 25 will also be powered off and the air will be cut off, relying on the force of the internal spring of the clamp 25 to clamp the X-axis guide 3 or the Y-axis guide 11, so that the linear motor can be braked instantly. This limit function is still effective in the event of a system failure.

[0039] Embodiment 4:

[0040] See also Figure 1 , 45. An embodiment of the present invention is as follows: an X-axis 1, an X-axis motor 2, an X-axis guide rail 3, a Y-axis 4, a Y-axis motor 5, a slide 6, a clamp 25 and a slider 26 form a mechanical brake mechanism. The clamp 25 is movably mounted on the X-axis guide rail 3 and the Y-axis guide rail 11. The clamp 25 is located between the slider 26. The X-axis guide rail 3 and the Y-axis guide rail 11 are respectively mounted with the clamp 25. The clamp 25 is of pneumatic normally closed type, which is closed in normal operation and opened in action. The specific brake force is determined by the driving force of the linear motor. When there is electricity, the pneumatic solenoid valve is powered to supply electricity to the clamp 25 for compression. Air, the clamp 25 is released from the clamping state and can move freely in the axial direction. When a system failure occurs, the PLC will require the pneumatic solenoid valve controlling the clamp 25 to be powered off. At this time, the compressed air supplied to the clamp 25 is interrupted, and the X-axis guide 3 or the Y-axis guide 11 can be clamped with the help of the internal spring force of the clamp 25, and finally the left and right slides 27 and the slide 6 are braked instantly. In the case of a sudden power failure, the solenoid valve will also be powered off and the air will be cut off, and the clamp 25 will brake after clamping the X-axis guide 3 or the Y-axis guide 11. In addition, the clamp 25 is arranged in the middle part of the slider 26 and will not occupy the axial travel position.

[0041] There are fourteen sliders 26, two of which are movably connected to the left and right sides of the top of the Y-axis guide rail 11, and the remaining twelve clamps 25 are divided into four groups of three and are respectively located at the top of each X-axis guide rail 3. Each group of sliders 26 is distributed at the top of each X-axis guide rail 3 in the form of two in front and one in the back. There are five clamps 25, one clamp 25 is located at the top of the Y-axis guide rail 11 and between the two sliders 26 on the Y-axis guide rail 11, and the remaining four clamps 25 are respectively located at the top of each X-axis guide rail 3 and between the three sliders 26 on each X-axis guide rail 3. The clamps 25 are located between the sliders 26, and the moving slider 27 is moved axially. Once the system fails, the slider 27 will clamp the X-axis guide rail 3 or the Y-axis guide rail 11, causing the linear motor to brake instantly.

[0042] Embodiment 5:

[0043] See also Figure 3 and 6An embodiment of the present invention is as follows: the oil pressure buffer 24 comprises an oil column 241, the inside of the oil column 241 is movably sleeved with a telescopic column 242, the other end of the telescopic column 242 is fixedly mounted with a top block 243, the outer surface of the telescopic column 242 is movably sleeved with a return spring 244, the two ends of the return spring 244 are respectively fixedly connected to the oil column 241 and the top block 243, the oil column 241 is fixedly mounted inside the fixed block 23, and the oil pressure buffer 24 is respectively mounted at both ends of the X-axis 1 and the Y-axis 4. The buffer adopts a multi-hole throttling design, which will produce huge damping, absorb the kinetic energy brought by the high-speed movement of the left and right sliders 26 and the slide 6, and when the DC bus energy braking, the deceleration switch braking, the limit switch braking, and the mechanical brake braking all fail, the oil pressure buffer 24 will completely absorb the energy of the high-speed moving parts, and finally stop them, and since the braking process has strong buffering, no vibration will be generated, and no damage will be caused to the parts.

[0044] The clamp 25 will be powered off and air-free when power is off or a fault occurs, and can instantly clamp the X-axis guide rail 3. The clamp 25 is movably connected to the outer surfaces of the X-axis guide rail 3 and the Y-axis guide rail 11. After the clamp 25 clamps the X-axis guide rail 3, the linear motor will be braked instantly to prevent the linear motor from flying out. The clamp 25 is movably connected to the outer surfaces of the X-axis guide rail 3 and the Y-axis guide rail 11, and can move with the movement of the slider 26, and will not affect the normal movement of the linear motor.

[0045] When the high-speed moving linear motor of this embodiment is braked, when there is power, the DC bus energy provided by the system is usually used for braking;

[0046] When there is power, the system fails, that is, the DC bus energy braking fails, and the pneumatic solenoid valve controlling the clamp 25 is powered off and the air is cut off, and the clamp 25 can instantly clamp the X-axis guide rail 3 or the Y-axis guide rail 11 for braking;

[0047] When there is power, the system fails and the brake of the clamp 25 also fails. At this time, the linear motor will move to the X-axis deceleration block 10 or the Y-axis deceleration block 18 and press the X-axis deceleration contact 15 or the Y-axis deceleration contact 21, so that the linear motor brakes within the set travel range;

[0048] When there is power, the system fails, and the Y-axis motor 5 brake and the deceleration switch brake also fail at the same time. At this time, the linear motor will continue to move to the X-axis limit block 9 or the Y-axis limit block 17 and press the X-axis limit contact 14 or the Y-axis limit contact 22, so that the linear motor brakes when it hits the hydraulic buffer 24;

[0049] When there is power, the system fails, and the brakes of the clamp 25, the deceleration switch and the limit switch also fail at the same time. The linear motor will eventually hit the oil buffer 24 at both ends of the stroke, and brake after the kinetic energy is completely absorbed;

[0050] In the case of a sudden power failure, the pneumatic solenoid valve controlling the clamp 25 is also powered off and the air is cut off, and the clamp 25 can instantly clamp the X-axis guide rail 3 or the Y-axis guide rail 11 for braking;

[0051] In the event of a sudden power outage, if the brake of the clamp 25 fails, the linear motor will eventually hit the oil pressure buffer 24 at both ends of the stroke, and brake after the kinetic energy is completely absorbed.

[0052] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An emergency brake device for a crane gantry linear motor, characterized in that: The overhead travelling crane gantry linear motor emergency brake device comprises two X-axes (1), an X-axis motor (2), an X-axis guide rail (3), a Y-axis (4), a Y-axis motor (5), a slide seat (6), a Y-axis guide rail (11) and a slide plate (27). The number of the X-axis motors (2) is two and they are respectively fixedly mounted on the middle of the top surfaces of the two X-axes (1). The number of the X-axis guide rails (3) is four and the four X-axis guide rails (3) are divided into two groups with two as a group and each group of the X-axis guide rails (3) is respectively fixedly mounted on the left and right sides of the top of the X-axis (1). The slide plate (27) is fixedly mounted on the X-axis. The top of the motor (2), the Y-axis (4) is fixedly mounted on the top of the slide plate (27), the Y-axis motor (5) is fixedly mounted on the front side of the Y-axis (4), the Y-axis guide rail (11) is fixedly mounted on the front side of the top of the Y-axis (4), the slide seat (6) is fixedly mounted on the front side of the Y-axis motor (5), the bottom of the primary components of the X-axis motor (2) and the Y-axis motor (5) are both fixedly mounted with a slider (26), the slider (26) is movably connected to the outer surface of the X-axis guide rail (3), and the top of the X-axis motor (2) and the front side of the Y-axis (4) are both fixedly mounted with a fixed block (23); An X-axis slot plate fixing frame (7) is arranged on the top of the right X-axis (1), an X-axis slot plate (8) is fixedly installed on the top of the X-axis slot plate fixing frame (7), an X-axis limit collision block (9) and an X-axis deceleration collision block (10) are arranged on the top of the X-axis slot plate (8), an X-axis switch fixing frame (12) is fixedly installed on the right side of the front face of the Y-axis (4), an X-axis limit contact (14) and an X-axis deceleration contact (15) are arranged on the right side of the X-axis switch fixing frame (12), a Y-axis slot plate (16) is arranged on the top of the Y-axis (4), and the Y-axis slot plate (16) is provided on the right side of the Y-axis (4). A Y-axis limit bumper (17) and a Y-axis deceleration bumper (18) are fixedly installed on the top, a Y-axis switch fixing frame (19) is fixedly installed on the back of the slide seat (6), a Y-axis double-contact travel switch (20) is fixedly installed on the front of the Y-axis switch fixing frame (19), a Y-axis deceleration contact (21) and a Y-axis limit contact (22) are fixedly installed on the bottom of the Y-axis double-contact travel switch (20), a clamp (25) is arranged in the middle of the X-axis guide rail (3) and the Y-axis guide rail (11), and an oil pressure buffer (24) is arranged inside the fixed block (23).

2. The emergency brake device for a gantry linear motor of a crane according to claim 1, characterized in that: The front side of the X-axis switch fixing frame (12) is fixedly mounted with an X-axis double-contact travel switch (13); the X-axis deceleration contact (15) is fixedly mounted on the right side of the bottom of the X-axis double-contact travel switch (13); the X-axis (1), the X-axis motor (2), the X-axis guide rail (3), the Y-axis (4), the Y-axis motor (5), the slide seat (6), the slider (26), the X-axis slot plate fixing frame (7), the X-axis slot plate (8), the X-axis deceleration block (10), the Y-axis guide rail (11), the X-axis switch fixing frame (12), the X-axis double-contact travel switch (13), the X-axis deceleration contact (15), the Y-axis slot plate (16), the Y-axis deceleration block (18), the Y-axis switch fixing frame (19), the Y-axis double-contact travel switch (20) and the Y-axis deceleration contact (21) form a deceleration switch braking mechanism; the X-axis (1 ), the X-axis motor (2), the X-axis guide rail (3), the slider (26), the X-axis slot plate fixing frame (7), the X-axis slot plate (8), the X-axis deceleration block (10), the X-axis switch fixing frame (12), the X-axis double-contact stroke switch (13) and the X-axis deceleration contact (15) constitute a deceleration switch braking module in the X-axis direction; the Y-axis (4), the Y-axis motor (5), the slider (6), the Y-axis guide rail (11), the Y-axis slot plate (16), the Y-axis deceleration block (18), the Y-axis switch fixing frame (19), the Y-axis double-contact stroke switch (20) and the Y-axis deceleration contact (21) constitute a deceleration switch braking module in the Y-axis direction; the X-axis slot plate fixing frame (7) is fixedly mounted on the front side of the top of the right X-axis (1); the X-axis deceleration block (10) is fixedly mounted on the rear side of the top of the X-axis slot plate (8).

3. The emergency brake device for a gantry linear motor of a crane according to claim 1, characterized in that: The front side of the X-axis switch fixing frame (12) is fixedly mounted with an X-axis double-contact travel switch (13); the X-axis deceleration contact (15) is fixedly mounted on the right side of the bottom of the X-axis double-contact travel switch (13); the X-axis (1), the X-axis motor (2), the X-axis guide rail (3), the Y-axis (4), the Y-axis motor (5), the slide seat (6), the clamp (25), the slider (26), the X-axis slot plate fixing frame (7), the X-axis slot plate (8), the X-axis limit collision block (9), the Y-axis guide rail (11), the X-axis switch fixing frame (12), the X-axis double-contact travel switch (13), the X-axis limit contact (14), the Y-axis slot plate (16), the Y-axis limit collision block (17), the Y-axis switch fixing frame (19), the Y-axis double-contact travel switch (20) and the Y-axis The limit contact (22) forms a limit switch braking mechanism; the X-axis (1), the X-axis motor (2), the X-axis guide rail (3), the slide block (26), the X-axis slot plate fixing frame (7), the X-axis slot plate (8), the X-axis limit bumper (9), the X-axis switch fixing frame (12), the clamp (25), the X-axis double-contact travel switch (13) and the X-axis limit contact (14) form a limit switch braking module in the X-axis direction; the Y-axis (4), the Y-axis motor (5), the slide seat (6), the Y-axis guide rail (11), the Y-axis slot plate (16), the Y-axis limit bumper (17), the Y-axis switch fixing frame (19), the clamp (25), the Y-axis double-contact travel switch (20) and the Y-axis limit contact (22) form a deceleration switch braking module in the Y-axis direction.

4. The emergency brake device for a gantry linear motor of a crane according to claim 1, characterized in that: The X-axis (1), the X-axis motor (2), the X-axis guide rail (3), the Y-axis (4), the Y-axis motor (5), the slide seat (6), the clamp (25) and the slider (26) form a mechanical brake mechanism, wherein the clamp (25) is movably mounted on the X-axis guide rail (3) and the Y-axis guide rail (11), and the clamp (25) is located between the sliders (26); The number of the sliders (26) is fourteen, two of the sliders (26) are movably connected to the left and right sides of the top of the Y-axis guide rail (11), and the remaining twelve sliders (26) are divided into four groups of three and are respectively located at the top of each X-axis guide rail (3). The sliders (26) of each group are distributed at the top of each X-axis guide rail (3) in the form of two in front and one in the back. The number of the clamps (25) is five, one of the clamps (25) is located at the top of the Y-axis guide rail (11) and between the two sliders (26) on the Y-axis guide rail (11), and the remaining four of the clamps (25) are respectively located at the top of each X-axis guide rail (3) and between the three sliders (26) on each X-axis guide rail (3).

5. The emergency brake device for a gantry linear motor of a crane according to claim 1, characterized in that: The oil pressure buffer (24) comprises an oil column (241), a telescopic column (242) is movably sleeved inside the oil column (241), a top block (243) is fixedly mounted on the other end of the telescopic column (242), a return spring (244) is movably sleeved on the outer surface of the telescopic column (242), two ends of the return spring (244) are respectively fixedly connected to the oil column (241) and the top block (243), and the oil column (241) is fixedly mounted inside the fixed block (23).

6. The emergency brake device for a gantry linear motor of a crane according to claim 4, characterized in that: The clamp (25) will cut off power and air when power is cut off or a fault occurs, and can instantly clamp the X-axis guide rail (3). The clamp (25) is movably clamped on the outer surfaces of the X-axis guide rail (3) and the Y-axis guide rail (11).

7. The emergency brake device for a gantry linear motor of a crane according to claim 1, characterized in that: The number of the Y-axis slot plates (16) is two and they are respectively distributed on the left and right sides of the top of the Y-axis (4); the center plane of the Y-axis slot plate (16) and the center plane of the Y-axis double-contact travel switch (20) are in the same plane.

8. The emergency brake device for a gantry linear motor of a crane according to claim 1, characterized in that: The number of the oil pressure buffers (24) is six, and the six oil pressure buffers (24) are divided into three groups with two of each group and are respectively distributed on the two X axes (1) and the Y axis (4).

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