Absolute encoder transmission fixture for automated field bridge with protective cover trolley

Abstract

The present invention relates to a transmission fixing device for an absolute value encoder of a trolley with a protective cover for an automated field bridge, characterized in that an additional transmission fixing device for an absolute value encoder of the trolley is provided, the device comprises a transmission gear fixedly connected to a coupling, a driven wheel arranged in parallel with the transmission gear and meshingly connected therewith, an absolute value encoder and a transmission support mechanism connected between the driven wheel and the absolute value encoder, the transmission support mechanism comprises a driven wheel shaft parallel to the trolley driving shaft, a driven wheel connecting flange, a double flange bearing frame, a right angle support plate, an encoder coupling and an encoder connecting flange; one end of the driven wheel shaft is connected to the driven wheel, and the other end is connected to the absolute value encoder through the encoder coupling; a detachable protective cover is provided for the transmission fixing device for the absolute value encoder of the cover trolley. The advantages of the present invention are: accurate transmission of the position change of the trolley, accurate positioning of the trolley; corrosion resistance, waterproofness and safe operation.

Description

Technical Field

[0001] The invention relates to a trolley structure of an automated field bridge of a container terminal, and in particular to a transmission fixing device for an absolute encoder of a trolley with a protective cover for the automated field bridge. Background Art

[0002] Yard crane is a widely used lifting and loading equipment in container yards, such as Figure 1-2 As shown, it mainly includes a trolley A, a trolley B and a lifting mechanism C. The trolley adopts a gantry structure, and the gantry is composed of a top beam A1 and two columns A2. The trolley B mainly completes the drive control and movement of the slide rail B10 set on the top edge of the front and rear walls A11 and A12 of the gantry top beam. The arrow in the middle is the movement direction of the trolley. The trolley B is provided with a trolley frame B0, on which the trolley drive mechanism is provided, and it also includes the driving device of the lifting mechanism C part. The trolley drive mechanism mainly includes: a motor B2 integrally connected to the incremental encoder B1, a reducer B4 connected to the motor, a low-speed output shaft B5, a coupling B6, a trolley drive shaft B9, a gear rack meshing mechanism B7 composed of a trolley gear B71 connected to the end of the trolley drive shaft and a rack B72 laid on the top edge of the front and rear walls of the trolley top beam, a slide rail B10 laid on the top edge of the front and rear walls A11 and A12 of the trolley top beam, and horizontal wheels B8 arranged on both sides of the slide rail. The low-speed output shaft B5 is arranged perpendicular to the front and rear walls, and the two ends of the low-speed output shaft B5 are connected to the trolley drive shaft B9 through the coupling B6, respectively. The trolley B driven by the gear rack meshing mechanism B7 is guided by the horizontal wheel B8 to move along the slide rail B10. It can be seen that during operation, the motor B2 rotates, and the gear B71 is driven to roll on the meshing rack B72 through the reducer B4, the low-speed output shaft B5, and the trolley drive shaft B9, so that the trolley moves along the slide rail B10 under the guidance of the horizontal wheels B8 arranged on both sides of the slide rail B10. The motor B2 controls the inverter through the PLC of the whole machine electronic control system to control the motor output torque, and at the same time detects the output feedback of the trolley motor through the incremental encoder B1 and performs real-time detection with the PLC of the whole machine electronic control system to form a stable and reliable closed-loop control.

[0003] The automated field bridge has higher requirements for the positioning accuracy of the trolley, and requires precise control and measurement of the trolley position data. Therefore, an absolute encoder needs to be installed. The positioning of the trolley of the conventional field bridge is relatively rough, and a single incremental encoder can meet the accuracy requirements of use. The incremental encoder is installed on the side of the motor B2 and is an integrated package product with the motor. The incremental encoder detects the real-time speed of the trolley and calculates the trolley position value through the PLC of the electronic control system, but there is a deviation in the accuracy of its real-time position monitoring. Therefore, in the field bridge automation transformation, an absolute encoder is selected to be added. The absolute encoder detects the position of the trolley in real time and verifies it with the calculated value obtained by the incremental encoder, thereby optimizing the positioning accuracy of the trolley and achieving precise positioning of the trolley. The dual detection solution is safer and more reliable, and redundant protection is achieved. The original incremental encoder is still retained as a detection of the real-time speed of the trolley, which is also a protection for the positioning and operation of the trolley.

[0004] However, in the placement of absolute encoders, for daily operation and maintenance considerations, it is required that the encoders can accurately transmit the position changes of the trolley, be easy to install, inspect and lubricate, and have functions such as corrosion resistance and rain erosion resistance. How to complete the installation of absolute encoders while meeting the above requirements has become a practical problem faced in the transformation of automated field bridges. Summary of the invention

[0005] The main purpose of the present invention is to provide a transmission fixing device for an absolute encoder of a trolley with a protective cover for an automated field bridge in order to solve the above-mentioned problems, thereby realizing accurate transmission of the trolley position change and accurate positioning of the trolley; at the same time, the device is easy to install, inspect, lubricate and maintain, and also has the characteristics of anti-corrosion, water erosion and safe operation.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A transmission fixing device for an absolute encoder of a trolley with a protective cover for an automated field bridge, wherein the trolley reciprocates along the top beam through a trolley driving mechanism arranged between the front and rear walls of a field bridge door frame type trolley top beam, the trolley driving mechanism comprising a motor integrally equipped with an incremental encoder, a reducer connected to the motor, a low-speed output shaft of the reducer, a coupling, a trolley driving shaft, a gear-rack meshing mechanism consisting of a trolley gear connected to the end of the trolley driving shaft and a rack laid on the top edge of the front and rear walls of the trolley top beam, a slide rail laid on the top edge of the front and rear walls of the trolley top beam, and a gear-rack meshing mechanism arranged on both sides of the slide rail. The horizontal wheel on the side; the low-speed output shaft is arranged perpendicular to the front and rear walls, and the two ends of the low-speed output shaft are respectively connected to the trolley drive shaft through couplings, and the trolley driven by the gear rack meshing mechanism moves along the slide rail through the horizontal wheel guide; it is characterized by an additional trolley absolute value encoder transmission fixing device, the trolley absolute value encoder transmission fixing device includes a transmission gear fixed on one of the couplings, a driven wheel arranged in parallel with the transmission gear and meshingly connected therewith, an absolute value encoder and a transmission support mechanism connected between the driven wheel and the absolute value encoder, the The transmission support mechanism includes a driven wheel shaft parallel to the trolley drive shaft, a driven wheel connecting flange, a double-flange bearing frame, a right-angle support plate, an encoder coupling and an encoder connecting flange; the double-flange bearing frame is composed of a shaft sleeve and a driven wheel fixed flange plate and an encoder fixed flange plate integrally connected at both ends thereof, a plurality of threaded end support rods perpendicular to the plate surface are fixedly connected to the encoder fixed flange plate toward the absolute encoder side, the driven wheel shaft is supported in the double-flange bearing frame sleeve by bearings respectively embedded at both ends of the double-flange bearing frame sleeve, one end of the driven wheel shaft is connected to the driven wheel The wheel has one end connected to the absolute encoder through an encoder coupling, the driven wheel is fixed to the driven wheel fixed flange plate through the driven wheel connecting flange, the right-angle support plate is fixed to the encoder fixed flange plate through the through holes on its vertical plate corresponding to the multiple threaded end support rods, the absolute encoder is fixedly connected to the encoder fixed flange plate through the multiple through holes on the encoder connecting flange corresponding to the threaded ends of the multiple threaded end support rods, and the horizontal plate of the right-angle support plate is fixedly mounted on the bottom plate of the trolley platform through a seat plate.

[0008] A protective cover is provided on the transmission fixing device of the trolley absolute encoder, and the protective cover is detachably mounted on the bottom plate of the trolley platform.

[0009] The protective cover has a rectangular shell, and an inverted U-shaped through hole is arranged on the side wall of the shell corresponding to the low-speed output shaft of the trolley and the trolley drive shaft that vertically passes through the wall. A movable cover and a cover lock are arranged on the top of the shell, and the shell is fixed to the bottom plate of the trolley platform through multiple supporting legs movably connected to its side wall.

[0010] The beneficial effects of the present invention are:

[0011] ⑴ The trolley absolute encoder transmission fixing device provided by the present invention utilizes the gear meshing transmission principle to install a transmission gear on the coupling of the trolley drive shaft, mesh the driven wheel with the transmission gear, and drive the absolute encoder to rotate through the transmission support mechanism, thereby realizing synchronous transmission between the trolley drive shaft and the absolute encoder, accurately transmitting the trolley position change, and transmitting the trolley movement data change to the absolute encoder. The incremental encoder detects the real-time speed of the trolley and calculates the trolley position value through the PLC of the electronic control system. The absolute encoder detects the trolley position in real time and verifies it with the calculated value obtained by the incremental encoder, thereby optimizing the positioning accuracy of the trolley, realizing accurate positioning of the trolley, and meeting the requirements for accurate positioning of the trolley movement in the operation control of the automated field bridge.

[0012] The device is firmly fixed on the bottom plate of the trolley platform through the right-angle support plate and the seat plate. It has stable and reliable transmission characteristics with the trolley drive shaft, and has the characteristics of small installation space, easy installation and maintenance, small changes to the original equipment, and low implementation cost.

[0013] (2) A detachable protective cover is installed on the transmission fixture of the trolley absolute encoder, which is easy to disassemble and convenient for maintenance and replacement of parts. A movable cover can be provided to observe the operating status of the transmission fixture of the trolley absolute encoder without removing the cover, and to carry out general maintenance such as inspection and lubrication. The protective cover can effectively prevent corrosion, water erosion, heavy objects from knocking against it, and debris from entanglement in the transmission mechanism, while ensuring the safety of maintenance personnel. The installation of a cover lock can ensure the safe operation of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main structural diagram of the field bridge;

[0015] Figure 2 yes Figure 1 The trolley part of the middle mast is viewed from above and rotated 90° to the right:

[0016] Figure 3 It is a schematic diagram of the application of the present invention in a field bridge trolley;

[0017] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of the present invention;

[0018] Figure 5 yes Figure 4 Assembly diagram of the absolute encoder transmission fixture for small and medium-sized vehicles;

[0019] Figure 6 yes Figure 4 A bottom view of the present invention (without transmission gear);

[0020] Figure 7 yes Figure 6Left side view of the center shield.

[0021] In the figure:

[0022] A trolley, A1 top beam, A11 front wall, A12 rear wall, A2 column, B trolley, B0 trolley frame, B1 incremental encoder, B2 motor, B3 trolley platform bottom plate, B4 reducer, B5 low-speed output shaft, B6 coupling, B7 gear rack meshing mechanism, B71 trolley gear, B72 rack, B8 horizontal wheel, B9 trolley drive shaft, B10 slide rail, B11 trolley drive shaft bearing, D trolley absolute encoder transmission fixture with protective cover for automated field bridge, D1 trolley absolute encoder transmission fixture, D2 protective cover.

[0023] 1 transmission gear, 2 driven wheel, 3 driven wheel connecting flange, 4 driven wheel shaft, 5 double flange bearing frame, 51 driven wheel fixed flange plate, 52 encoder fixed flange plate, 53 threaded end support rod, 6 right angle support plate, 61 vertical plate, 62 horizontal plate, 7 encoder coupling, 8 encoder connecting flange, 9 absolute encoder, 10 seat plate, 11-12 bearings, 20 transmission support mechanism, 21 housing, 22 support feet, 23 movable cover, 24 hinge, 25 cover lock, 26 U-shaped through hole, 27 bolt.

[0024] The present invention is described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0025] Figure 3-Figure 7 The present invention shows a transmission fixing device D of an absolute encoder of a trolley with a protective cover for an automated field bridge and its application in a trolley B of an existing field bridge. As mentioned above, in the existing field bridge, the trolley B moves back and forth along the top beam A1 through a trolley driving mechanism arranged between the front and rear walls A11 and A12 of the top beam A1 of the field bridge gantry trolley A. The trolley driving mechanism includes a motor B2 with an integral incremental encoder B1, a reducer B4 connected to the motor, a low-speed output shaft B5 of the reducer, a coupling B6, a trolley driving shaft B9, a gear rack meshing mechanism B7 consisting of a trolley gear B71 connected to the end of the trolley driving shaft and a rack B72 laid on the top edge of the front and rear walls A11 and A12 of the trolley roof beam, a slide rail B10 laid on the top edge of the front and rear walls of the trolley roof beam, and horizontal wheels B8 arranged on both sides of the slide rail; the low-speed output shaft B5 is arranged perpendicular to the front and rear walls, and the two ends of the low-speed output shaft are respectively connected to the trolley driving shaft B9 through couplings B6, and the trolley driving shaft B9 is supported on the trolley driving shaft bearing B11. The trolley B driven by the gear rack meshing mechanism B7 moves along the slide rail B10 guided by the horizontal wheel B8.

[0026] The present invention is characterized in that an additional trolley absolute encoder transmission fixing device D1 is provided, such as Figure 3-Figure 7As shown, the trolley absolute encoder transmission fixing device D1 includes a transmission gear 1 fixed on the coupling B6, a driven wheel 2 arranged in parallel with the transmission gear 1 and meshingly connected therewith, an absolute encoder 9, and a transmission support mechanism 20 connected between the driven wheel 2 and the absolute encoder 9. The transmission gear 1 is fixed on the coupling B6 by the fastening bolts on the coupling B6.

[0027] The transmission support mechanism 20 includes a driven wheel shaft 4 parallel to the trolley drive shaft B9, a driven wheel connection flange 3, a double flange bearing frame 5, a right angle support plate 6, an encoder coupling 7 and an encoder connection flange 8; the double flange bearing frame 5 is composed of a shaft sleeve and a driven wheel fixed flange plate 51 and an encoder fixed flange plate 52 integrally connected to the two ends thereof. A plurality of threaded end support rods 53 perpendicular to the plate surface are fixedly connected to the encoder fixed flange plate 52 toward the absolute encoder side. In this example, four threaded end support rods 53 are provided. The driven wheel shaft is supported in the sleeve of the double flange bearing frame through bearings 11 and 12 respectively embedded in the sleeves of the double flange bearing frame 5. One end of the driven wheel shaft 4 is connected to the driven wheel 2, and the other end is connected to the absolute value encoder 9 through the encoder coupling 7; the driven wheel 2 is fixed to the driven wheel fixed flange plate 51 through the driven wheel connecting flange 3; the right angle support plate 6 is fitted with the four threaded end support rods 53 through the four through holes corresponding to the four threaded end support rods 53 on its vertical plate 61, and is fixed to the encoder fixed flange plate 52 with bolts; the absolute value encoder 9 is fitted on the threaded ends of the four threaded end support rods 53 through the four through holes on the encoder connecting flange 8, and is fixedly connected to the encoder fixed flange plate 52 through nuts. The horizontal plate 62 of the right angle support plate is fixedly mounted on the bottom plate B3 of the trolley platform through the seat plate 10. The seat plate 10 is a vertical plate with a mounting flange on the top edge, the horizontal plate 62 is fixedly connected to the mounting flange of the seat plate 10 by bolts, and the bottom edge of the seat plate 10 is fixedly connected to the bottom plate B3 of the trolley platform by welding. Except for the key fixing connection between the driven wheel 2 and the driven wheel shaft 4, the other structural parts of the above device are bolted, so the whole device is easy to disassemble and assemble. The absolute encoder adopts the German P&F (German Pepperl+Fuchs) brand, and the commercial model is PVM581-011AGPOBN-1213.

[0028] Another feature of the present invention is that a protective cover D2 is provided to cover the trolley absolute encoder transmission fixing device D1, and the protective cover D2 is detachably mounted on the trolley platform bottom plate B3.

[0029] In actual production, the protective cover D2 has a rectangular shell 21, and an inverted U-shaped through hole 26 is provided on the side wall of the shell corresponding to the low-speed output shaft B5 of the trolley and the trolley drive shaft B9 that vertically pass through the wall. A movable cover 23 connected by a hinge 24 and a cover lock 25 are provided on the top of the shell. The shell 21 is fixed to the bottom plate B3 of the trolley platform through multiple legs 22 that are movably connected to its side walls. In this example, three legs 22 are respectively installed on the two side walls perpendicular to the low-speed output shaft B5. The legs are made of angle irons, and the upper end of the angle irons is provided with a long hole that can be adjusted and detachably fixed to the side wall of the shell 21 by bolts 27. The lower end of the angle iron is welded to the bottom plate B3 of the trolley platform. The cover lock 25 adopts a commercially available three-ring brand padlock, model: L365

[0030] Working principle

[0031] The trolley absolute encoder transmission fixing device D1 provided by the present invention is added to one side of the trolley driving shaft B9 of the trolley B of the existing automated field bridge. The transmission gear 1 is installed on the coupling B6 of the field bridge trolley driving shaft B9 by using the gear meshing transmission principle, and the driven wheel 2 is meshed with the transmission gear 1. The driven wheel 2 is connected to the absolute encoder 9 through the transmission support mechanism 20. The absolute encoder 9 is driven to rotate by the rotation of the driven wheel 2, thereby realizing the synchronous transmission of the trolley driving shaft and the absolute encoder, accurately transmitting the trolley position change, and transmitting the trolley movement data change to the absolute encoder 9. The incremental encoder detects the real-time speed of the trolley and calculates the trolley position value through the PLC of the electronic control system. The absolute encoder detects the trolley position in real time and verifies it with the calculated value obtained by the incremental encoder, thereby optimizing the positioning accuracy of the trolley, realizing the precise positioning of the trolley, and meeting the requirements for precise positioning of the trolley movement in the operation control of the automated field bridge.

[0032] The device is firmly fixed on the bottom plate of the trolley platform by the right-angle support plate 6 and the seat plate 10. It has stable and reliable transmission characteristics with the trolley drive shaft, and has the characteristics of small installation space, easy installation and maintenance, small changes to the original equipment, and low implementation cost.

[0033] In addition, in order to ensure that the trolley absolute encoder transmission fixture D1 has the functions of anti-corrosion and water erosion, and can be inspected and lubricated and maintained conveniently and quickly, and to ensure the safe operation of the device, a detachable protective cover D2 is provided to cover the trolley absolute encoder transmission fixture D1. The protective cover D2 has a rectangular shell 21, and an inverted U-shaped through hole 26 is provided on the side wall of the shell corresponding to the low-speed output shaft B5 of the trolley and the trolley drive shaft B9, thereby not hindering the rotation of the shaft. A movable cover 23 connected by a hinge 24 and a cover lock 25 are provided on the top of the shell. The side wall of the shell 21 is detachably connected to 6 legs 22 by bolts, and is fixed to the bottom plate B3 of the trolley platform by the 6 legs 22. The detachable protective cover is used for convenient maintenance and replacement of parts. Moreover, the movable cover 23 can be used to observe the movement of the absolute encoder without removing the cover, and general maintenance such as inspection and lubrication can be conveniently performed; the protective cover can effectively prevent corrosion, water erosion, heavy objects from knocking against, and prevent debris from winding around the transmission mechanism. The cover lock 25 is installed to ensure the safe operation of the entire device.

[0034] The above description is only a preferred embodiment of the present invention, and does not impose any formal limitation on the structure and shape of the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A transmission fixing device for an absolute encoder of a trolley with a protective cover for an automated field bridge, wherein the trolley reciprocates along the top beam through a trolley driving mechanism arranged between the front and rear walls of a field bridge door frame type trolley top beam, the trolley driving mechanism comprises a motor integrally equipped with an incremental encoder, a reducer connected to the motor, a low-speed output shaft of the reducer, a coupling, a trolley driving shaft, a gear-rack meshing mechanism consisting of a trolley gear connected to the end of the trolley driving shaft and a rack laid on the top edge of the front and rear walls of the trolley top beam, a slide rail laid on the top edge of the front and rear walls of the trolley top beam, and horizontal wheels arranged on both sides of the slide rail; the low-speed output shaft is arranged perpendicular to the front and rear walls, and both ends of the low-speed output shaft are respectively connected to the trolley driving shaft through a coupling, and the trolley driven by the gear-rack meshing mechanism moves along the slide rail through a horizontal wheel guide; it is characterized in that An additional trolley absolute encoder transmission fixing device is provided, and the trolley absolute encoder transmission fixing device includes a transmission gear fixed on one of the couplings, a driven wheel positioned in parallel with the transmission gear and meshingly connected therewith, an absolute encoder, and a transmission support mechanism connected between the driven wheel and the absolute encoder, and the transmission support mechanism includes a driven wheel shaft parallel to the trolley drive shaft, a driven wheel connecting flange, a double-flange bearing frame, a right-angle support plate, an encoder coupling and an encoder connecting flange; the double-flange bearing frame is composed of a shaft sleeve and a driven wheel fixed flange plate and an encoder fixed flange plate integrally connected at both ends thereof, and a plurality of threaded end supports perpendicular to the plate surface are fixedly connected to the encoder fixed flange plate toward the absolute encoder side. The support rod, the driven wheel shaft is supported in the double-flange bearing frame sleeve by bearings respectively embedded in the two ends of the double-flange bearing frame sleeve, one end of the driven wheel shaft is connected to the driven wheel, and the other end is connected to the absolute encoder through an encoder coupling, the driven wheel is fixed to the driven wheel fixed flange plate through the driven wheel connecting flange, the right-angle support plate is fixed to the encoder fixed flange plate through the through holes on its vertical plate corresponding to the multiple threaded end support rods, the absolute encoder is fixedly connected to the encoder fixed flange plate through the multiple through holes on the encoder connecting flange corresponding to the threaded ends of the multiple threaded end support rods, and the horizontal plate of the right-angle support plate is fixed to the bottom plate of the trolley platform through a seat plate.

2. The transmission fixing device of the absolute encoder of the trolley with protective cover for the automated field bridge according to claim 1 is characterized in that A protective cover is provided on the transmission fixing device of the trolley absolute encoder, and the protective cover is detachably mounted on the bottom plate of the trolley platform.

3. The absolute encoder transmission fixing device for the trolley with protective cover for the automated field bridge according to claim 2 is characterized in that The protective cover has a rectangular shell, and an inverted U-shaped through hole is arranged on the side wall of the shell corresponding to the low-speed output shaft of the trolley and the trolley drive shaft that vertically passes through the wall. A movable cover and a cover lock are arranged on the top of the shell, and the shell is fixed to the bottom plate of the trolley platform through multiple supporting legs movably connected to its side wall.

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