A driving mechanism for a longitudinal translation opening bridge

Abstract

A driving mechanism of a longitudinal translation opening bridge comprises a driving track, a chain driving device, a fixed bridge frame, a mobile bridge frame and a driving slider frame, wherein the driving track is fixed on the fixed bridge frame, the chain driving device comprises a reduction motor with an output shaft and a chain track, the output shaft of the reduction motor is provided with a sprocket, the sprocket is meshed with the chain track, the reduction motor is fixed to the driving slider frame, the chain track is fixed to the fixed bridge frame, the upper end of the driving slider frame is suspended on the driving track through a horizontal guide mechanism and a vertical guide mechanism, the lower end of the driving slider frame is connected to the mobile bridge frame through a vertical large pin shaft; and a synchronous driving controller is included, which is electrically connected to the reduction motor. The invention drives the driving slider frame and the mobile bridge frame to perform longitudinal translation along the driving track through the meshing action of the sprocket and the chain track, thereby realizing the telescopic opening of the lower bridge deck, and the operation is stable and reliable, the adaptability to bridge deformation is strong, and the control accuracy is high.

Description

Technical Field

[0001] The invention relates to a driving mechanism, in particular to a driving mechanism for providing power in a longitudinal translation type opening bridge, and belongs to the technical field of opening bridge driving mechanisms. Background Art

[0002] Bascule bridges are also called movable bridges and folding bridges. Bascule bridges can improve the navigation clearance of bridges, making it possible to build bridges on some rivers where bridges cannot be built. They are suitable for rivers or ports where traffic is not very frequent but tall ships must sail. The advantage is that the piers are low, which can greatly reduce the slope conditions on both sides, reduce the engineering volume of approach bridges and embankments on both sides, and make it possible for non-motor vehicles to ride across the river when the longitudinal slope is limited. At present, there are three types of bascule bridges at home and abroad: horizontal rotation type, vertical rotation type, and vertical lifting type. The horizontal rotation type bascule bridge is a bascule bridge whose span structure can rotate around a vertical axis. When it rotates 90 degrees horizontally, it allows ships on the river to pass; the vertical rotation type bascule bridge is a bridge that makes the span structure above the waterway rotate and open and close on the facade. The structure that opens and closes the entire span from one end is called a single-leaf vertical rotation bridge, and the structure that opens and closes from both ends is called a double-leaf vertical rotation bridge; the span of the navigable part of the lifting bascule bridge is made into a structure that can be lifted and lowered, and a tower and a suspended counterweight are required at both ends of the span. The above opening methods require interrupting the traffic on the bridge when opening. At the same time, due to the limitation of mechanical lifting capacity, the opening width is generally small, and ships need to slow down to pass through. In addition, regardless of the size of the ship, it needs to be opened when passing, which seriously affects the traffic function on the bridge and the ship traffic capacity under the bridge.

[0003] In view of the shortcomings of the previous types of opening bridges, the lower longitudinal translation opening bridge has the advantages of high safety performance and does not affect the traffic of the upper bridge when it is opened. It is a new opening bridge with broad application prospects. However, due to the large span and complex structure of the longitudinal translation opening bridge, in addition to the high requirements for the synchronization of the movement of each structure in the open state, the upper structure will produce downward deflection during the driving and longitudinal movement of the lower mobile bridge frame, resulting in a deformation difference between the mobile bridge frame and the main structure. From the perspective of safety, in the event of a power failure of the drive motor, the drive motor is required to have a self-locking function to prevent the mobile bridge frame from sliding down the slope. The traditional drive mechanism cannot adapt to the above floating deformation and safety requirements, and it is urgent to develop a new drive mechanism. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a driving mechanism for a longitudinal translational opening bridge. After using the driving mechanism, the meshing action of the sprocket and the chain track provides a working reaction force for the longitudinal telescopic and translational movement of the movable bridge frame, thereby driving the movable bridge frame to perform longitudinal translation along the driving track, thereby realizing the telescopic opening of the bridge deck. The driving mechanism has a simple structure, smooth and reliable operation, strong adaptability to bridge deformation, and high control accuracy.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A driving mechanism of a longitudinal translation opening bridge, the driving mechanism comprising a driving track, a chain driving device, a fixed bridge frame, a movable bridge frame and a driving slider frame, the driving track is fixed on the fixed bridge frame, the chain driving device comprises a reduction motor with an output shaft and a chain track, the reduction motor is fixed on the driving slider frame, the output shaft of the reduction motor is provided with a sprocket with gear teeth, the sprocket is meshed with the chain track, and drives the driving slider frame to move along the driving track, the chain track is fixed on the driving track, and the upper end of the driving slider frame is suspended on the driving track through horizontal and vertical guide mechanisms, The lower end of the driving slider frame is connected to the movable bridge frame through a vertical large pin shaft, and a pin shaft mounting plate is provided at the lower end of the vertical large pin shaft, and the pin shaft mounting plate is bolted and fastened to the movable bridge frame, and a vertical through hole is provided at the center position of the driving slider frame, and the vertical through hole is laterally contacted and connected with the vertical large pin shaft, so that when the fixed bridge frame generates vertical displacement, the vertical large pin shaft can float up and down in the vertical through hole, so that the driving slider frame can adapt to the deformation of the bridge structure when driving the movable bridge frame to move longitudinally;

[0007] The chain drive device includes a horizontal guide mechanism and a vertical guide mechanism installed on the driving slider frame, the horizontal guide mechanism includes two groups of support frames and two groups of horizontal guide wheels connected to the two groups of support frame pins, the front and rear groups of support frames are respectively fastened to the two ends of the driving slider frame in the transverse direction, the same group of support frames are symmetrically arranged on the left and right sides of the driving track, the two groups of horizontal guide wheels are respectively in conflict with the two sides of the driving track to stabilize the linear motion of the left and right sides of the moving bridge, the vertical guide mechanism includes two groups of outer cover plates, two groups of guide wheel shafts and two groups of vertical Guide wheels, the two groups of outer cover plates are symmetrically arranged on both sides of the reduction motor at the front and rear, the two groups of outer cover plates are bolted and fastened to the driving slider frame, the two groups of guide wheel shafts are symmetrically arranged on both sides of the driving track at the left and right, the driving track is an I-shaped driving track in cross section, a first horizontal steel plate is arranged at the bottom end of the driving track, the two groups of guide wheel shafts are symmetrically arranged on both sides of the first horizontal steel plate at the upper and lower ends, the guide wheel shafts are interference fit with the vertical guide wheels, the vertical guide wheels are in conflict with both sides of the first horizontal steel plate to make the driving track move smoothly in an upward and downward straight line;

[0008] The driving mechanism further comprises a synchronous driving controller, which is electrically connected to the reduction motor to control the forward and reverse rotation of the reduction motor.

[0009] In order to solve the technical problem, the further technical solution adopted by the present invention is:

[0010] Furthermore, a support plate is provided on the side of the driving slider frame, and the support plate is fastened to the reduction motor by hexagon socket bolts. The reduction motor is provided with an upper cover plate, and the upper cover plate is inserted by the output shaft of the reduction motor. The output shaft of the reduction motor is fastened to the upper cover plate by hexagon socket bolts to ensure that the sprocket is stably engaged with the chain track.

[0011] Furthermore, the opening bridge is provided with an upper bridge body, the upper bridge body is provided with a fixed crossbeam, a second horizontal steel plate is provided on the top of the driving track, and the second horizontal steel plate is fastened to the fixed crossbeam of the upper bridge body by bolts.

[0012] Furthermore, the main body of the driving rail is a vertical steel plate, the lower end of the vertical steel plate is fixedly connected to the first horizontal steel plate, the upper end of the vertical steel plate is fixedly connected to the second horizontal steel plate, the chain rail is fastened to the vertical steel plate of the driving rail by hexagon socket bolts, and the sprocket is engaged with the chain rail.

[0013] Furthermore, the driving mechanism is provided with a box beam, the driving slider frame is provided with a mounting hole, and the box beam is arranged in the mounting hole of the driving slider frame.

[0014] Furthermore, the guide wheel shaft includes a long end shaft and a short end shaft, the box beam is provided with a positioning hole, the long end shaft is inserted into the positioning hole of the box beam and is fastened to the outer cover plate by bolts, and the short end shaft is interference fit with the vertical guide wheel.

[0015] Furthermore, the movable bridge is provided with a reserved hole, the large vertical pin is inserted into the reserved hole, and the large vertical pin is used to fasten the pin mounting plate to the movable bridge via bolts so that the driving mechanism is fixed on the movable bridge.

[0016] Furthermore, the difference between the diameter of the vertical through hole of the driving slider frame and the diameter of the vertical large pin is 3-5 mm.

[0017] Furthermore, the reduction motor is a reduction motor with a self-locking function, and the ratio of the self-locking force to the power of the reduction motor is 2-3.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention has a simple structure, is easy to manufacture, has low power consumption, can effectively save construction costs, is light in weight, compact in size, is easy to arrange on a mobile bridge, is easy to operate, has a large transmission torque, has high working efficiency, is suitable for use on an opening bridge, and shortens the construction period;

[0020] Second, the movable bridge of the present invention has good deformation adaptability. The driving slider frame moving along the driving track of the present invention is connected to the movable bridge by a floating vertical large pin shaft, that is, when the upper fixed bridge and the movable bridge produce vertical displacement, the vertical large pin shaft installed on the movable bridge can slide up and down in the vertical through hole on the driving slider frame to adapt to the deformation difference between the movable bridge and the main structure of the opening bridge;

[0021] 3. The driving mechanism of the present invention is applied to the opening bridge and has good moving stability. The present invention is equipped with two sets of horizontal guide wheels and vertical guide wheels, which are in close contact with the vertical steel plate of the driving track and the first horizontal steel plate at the bottom of the driving track, respectively, which not only enhances the anti-overturning ability, but also prevents the driving mechanism from leaving the driving track, ensuring that the mobile bridge frame can smoothly perform linear reciprocating motion;

[0022] Fourth, the driving mechanism of the present invention has high control accuracy. The present invention adopts a reduction motor drive, which can achieve stepless speed regulation and precise control. It is matched with a synchronous drive controller. The synchronous drive controller is electrically connected to the reduction motor to control the forward and reverse rotation of the reduction motor. It can accurately achieve synchronous output of multiple devices and ensure the uniformity and consistency of the driving force.

[0023] 5. The driving mechanism of the present invention has high operating reliability. The contact surface between the sprocket and the chain track in the present invention is a vertical surface, which avoids the accumulation of sediment and impurities and is conducive to ensuring transmission accuracy and reliability.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is one of the structural schematic diagrams of the driving mechanism of a longitudinal translation type opening bridge described in the present invention;

[0026] Figure 2 This is the second structural schematic diagram of the driving mechanism of the longitudinal translation type opening bridge described in the present invention;

[0027] Figure 3 This is the third structural schematic diagram of the driving mechanism of the longitudinal translation type opening bridge described in the present invention;

[0028] Figure 4 yes Figure 3 Transverse cross-section of

[0029] The parts in the accompanying drawings are marked as follows:

[0030] Sprocket 1, upper cover plate 2, drive track 3, chain track 4, outer cover plate 5, reduction motor 6, support frame 7, guide wheel shaft 8, vertical guide wheel 9, horizontal guide wheel 10, box beam 11, drive slider frame 12, vertical large pin shaft 13, pin shaft mounting plate 14, fixed bridge frame 15 and movable bridge frame 16. DETAILED DESCRIPTION

[0031] The following is a specific embodiment of the present invention, and those skilled in the art can easily understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented in other different ways, that is, different modifications and changes can be made without departing from the scope disclosed by the present invention. Example

[0032] A driving mechanism for a longitudinally translatable opening bridge, such as Figure 1-Figure 4 As shown, the driving mechanism includes a driving track 3, a chain driving device, a fixed bridge 15, a movable bridge 16 and a driving slider frame 12, wherein the driving track is fixed on the fixed bridge 15, and the chain driving device includes a reduction motor 6 with an output shaft and a chain track 4, wherein the output shaft of the reduction motor is provided with a sprocket 1 with gear teeth, and the sprocket 1 is engaged with the chain track 4 to drive the driving slider frame 12 to move along the driving track 3, wherein the chain track 4 is fixed on the driving track 3, and the reduction motor 6 is fixed on the driving slider frame 12, and the upper end of the driving slider frame 12 is suspended on the driving track 3 through horizontal and vertical guide mechanisms, The lower end of the driving slider frame 12 is connected to the mobile bridge frame 16 through a vertical large pin shaft 13, and a pin shaft mounting plate 14 is provided at the lower end of the vertical large pin shaft 13, and the pin shaft mounting plate 14 is bolted and connected to the mobile bridge frame 16. A vertical through hole is provided at the center position of the driving slider frame 12, and the vertical through hole is laterally contacted and connected with the vertical large pin shaft 13, so that when the fixed bridge frame 15 generates vertical displacement, the vertical large pin shaft 13 can float up and down in the vertical through hole, so that the driving slider frame 12 can adapt to the deformation of the bridge structure when driving the mobile bridge frame 16 to move longitudinally;

[0033] The chain drive device includes a horizontal guide mechanism and a vertical guide mechanism installed on the driving slider frame 12. The horizontal guide mechanism includes two groups of support frames 7 and two groups of horizontal guide wheels 10 connected to the two groups of support frame pins. The front and rear groups of support frames 7 are respectively fastened to the two ends of the driving slider frame 12 in the transverse direction. The same group of support frames 7 are symmetrically arranged on the left and right sides of the driving track 3. The two groups of horizontal guide wheels 10 are respectively in conflict with the two sides of the driving track 3 to stabilize the linear motion of the left and right sides of the mobile bridge 16. The vertical guide mechanism includes two groups of outer cover plates 5, two groups of guide wheel shafts 8 and two groups of vertical guide wheels. Straight guide wheels 9, the two groups of outer cover plates 5 are symmetrically arranged on both sides of the reduction motor 6 at the front and rear, the two groups of outer cover plates 5 are bolted and fastened to the driving slider frame 12, the two groups of guide wheel shafts 8 are symmetrically arranged on both sides of the driving track 3 at the left and right, the driving track 3 is an I-shaped driving track in cross section, a first horizontal steel plate is provided at the bottom end of the driving track 3, the two groups of guide wheel shafts 8 are symmetrically arranged on both sides of the first horizontal steel plate at the upper and lower ends, the guide wheel shafts 8 are interference fit with the vertical guide wheels 9, and the vertical guide wheels 9 are in conflict with both sides of the first horizontal steel plate to make the driving track 3 move smoothly up and down in a straight line;

[0034] The driving mechanism further comprises a synchronous driving controller, which is electrically connected to the reduction motor 6 to control the forward and reverse rotation of the reduction motor.

[0035] A support plate is provided on the side of the driving slider frame 12, and the support plate is fastened to the reduction motor 6 by hexagon socket bolts. The reduction motor 6 is provided with an upper cover plate 2, and the upper cover plate 2 is inserted by the output shaft of the reduction motor 6. The output shaft of the reduction motor 6 is fastened to the upper cover plate 2 by hexagon socket bolts to ensure that the sprocket 1 is stably engaged with the chain track 4.

[0036] The opening bridge is provided with an upper bridge body, and the upper bridge body is provided with a fixed crossbeam. A second horizontal steel plate is provided on the top of the driving track 3, and the second horizontal steel plate is fastened and connected with the fixed crossbeam bolts of the upper bridge body.

[0037] The main body of the driving rail 3 is a vertical steel plate, the lower end of the vertical steel plate is fixedly connected to the first horizontal steel plate, the upper end of the vertical steel plate is fixedly connected to the second horizontal steel plate, the chain rail 4 is fastened to the vertical steel plate of the driving rail 3 by hexagon socket bolts, and the sprocket 1 is engaged with the chain rail 2.

[0038] The driving mechanism is provided with a box beam 11, the driving slider frame 12 is provided with a mounting hole, and the box beam 11 is arranged in the mounting hole of the driving slider frame.

[0039] The guide wheel shaft 8 includes a long end shaft and a short end shaft. The box beam 11 is provided with a positioning hole. The long end shaft is inserted into the positioning hole of the box beam 11 and is fastened to the outer cover plate 5 by bolts. The short end shaft is interference fit with the vertical guide wheel 9.

[0040] The movable bridge 16 is provided with a reserved hole, the vertical large pin 13 is inserted into the reserved hole, and the vertical large pin 13 is fastened to the pin mounting plate 14 and the movable bridge 16 by bolts so that the driving mechanism is fixed on the movable bridge 16 .

[0041] The difference between the hole diameter of the vertical through hole of the driving slider frame 12 and the shaft diameter of the vertical large pin 13 is 3-5 mm.

[0042] The reduction motor 6 is a reduction motor with a self-locking function, and the ratio of the self-locking force to the power of the reduction motor 6 is 2-3.

[0043] The working process and working principle of the present invention are as follows:

[0044] The driving mechanism of the present invention is installed and fixed on the moving bridge 16 to ensure that the teeth of the sprocket 1 are meshed with the chain track 4; the two sides of the vertical steel plate of the driving track are in contact with the two groups of horizontal guide wheels 10, and the two sides of the first horizontal steel plate at the bottom of the driving track 3 are in contact with the two groups of vertical guide wheels 9; when the moving bridge 16 is opened, the reduction motor 6 drives the sprocket 1 to operate, and the sprocket 1 drives the chain track 4 to engage, thereby driving the driving slider frame 12 to translate along the driving track 3, and the driving slider frame 12 is provided with a vertical through hole and a floating contact connection with the vertical large pin shaft 13, thereby providing a working reaction force for the longitudinal extension and translation of the moving bridge 16, driving the moving bridge 16 to extend and translate longitudinally, and when the moving bridge 16 moves to a fixed position, the reduction motor 6 stops running; when the moving bridge 16 needs to be closed, the reduction motor 6 can be operated in the opposite direction.

[0045] The above descriptions are merely embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A driving mechanism for a longitudinally translatable opening bridge, characterized in that: The driving mechanism includes a driving track, a chain driving device, a fixed bridge, a movable bridge and a driving slider frame, wherein the driving track is fixed on the fixed bridge, the chain driving device includes a reduction motor with an output shaft and a chain track, the reduction motor is fixed on the driving slider frame, the output shaft of the reduction motor is provided with a sprocket with gear teeth, the sprocket is engaged with the chain track, and drives the driving slider frame to move along the driving track, the chain track is fixed on the driving track, and the upper end of the driving slider frame is suspended on the driving track through horizontal and vertical guide mechanisms, The lower end of the driving slider frame is connected to the movable bridge frame through a vertical large pin shaft, and a pin shaft mounting plate is provided at the lower end of the vertical large pin shaft, and the pin shaft mounting plate is bolted and fastened to the movable bridge frame, and a vertical through hole is provided at the center position of the driving slider frame, and the vertical through hole is laterally contacted and connected with the vertical large pin shaft, so that when the fixed bridge frame generates vertical displacement, the vertical large pin shaft can float up and down in the vertical through hole, so that the driving slider frame can adapt to the deformation of the bridge structure when driving the movable bridge frame to move longitudinally; The chain drive device includes a horizontal guide mechanism and a vertical guide mechanism installed on the driving slider frame, the horizontal guide mechanism includes two groups of support frames and two groups of horizontal guide wheels connected to the two groups of support frame pins, the front and rear groups of support frames are respectively fastened to the two ends of the driving slider frame in the transverse direction, the same group of support frames are symmetrically arranged on the left and right sides of the driving track, the two groups of horizontal guide wheels are respectively in conflict with the two sides of the driving track to stabilize the linear motion of the left and right sides of the moving bridge, the vertical guide mechanism includes two groups of outer cover plates, two groups of guide wheel shafts and two groups of vertical Guide wheels, the two groups of outer cover plates are symmetrically arranged on both sides of the reduction motor at the front and rear, the two groups of outer cover plates are bolted and fastened to the driving slider frame, the two groups of guide wheel shafts are symmetrically arranged on both sides of the driving track at the left and right, the driving track is an I-shaped driving track in cross section, a first horizontal steel plate is arranged at the bottom end of the driving track, the two groups of guide wheel shafts are symmetrically arranged on both sides of the first horizontal steel plate at the upper and lower ends, the guide wheel shafts are interference fit with the vertical guide wheels, the vertical guide wheels are in conflict with both sides of the first horizontal steel plate to make the driving track move smoothly in an upward and downward straight line; The driving mechanism further comprises a synchronous driving controller, which is electrically connected to the reduction motor to control the forward and reverse rotation of the reduction motor.

2. The driving mechanism of the longitudinal translation type opening bridge according to claim 1 is characterized in that: A support plate is provided on the side of the driving slider frame, and the support plate is fastened to the reduction motor by hexagon socket bolts. The reduction motor is provided with an upper cover plate, and the upper cover plate is inserted by the output shaft of the reduction motor. The output shaft of the reduction motor is fastened to the upper cover plate by hexagon socket bolts to ensure that the sprocket is stably engaged with the chain track.

3. The driving mechanism of the longitudinal translation type opening bridge according to claim 1 is characterized in that: The opening bridge is provided with an upper bridge body, the upper bridge body is provided with a fixed crossbeam, and a second horizontal steel plate is provided on the top of the driving track, and the second horizontal steel plate is fastened and connected with the fixed crossbeam bolts of the upper bridge body.

4. The driving mechanism of the longitudinal translation type opening bridge according to claim 3 is characterized in that: The main body of the driving rail is a vertical steel plate, the lower end of the vertical steel plate is fixedly connected to the first horizontal steel plate, the upper end of the vertical steel plate is fixedly connected to the second horizontal steel plate, the chain rail is fastened to the vertical steel plate of the driving rail by hexagon socket bolts, and the sprocket is engaged with the chain rail.

5. The driving mechanism of the longitudinal translation type opening bridge according to claim 1 is characterized in that: The driving mechanism is provided with a box beam, the driving slider frame is provided with a mounting hole, and the box beam is arranged in the mounting hole of the driving slider frame.

6. The driving mechanism of the longitudinal translation type opening bridge according to claim 5 is characterized in that: The guide wheel shaft includes a long end shaft and a short end shaft. The box beam is provided with a positioning hole. The long end shaft is inserted into the positioning hole of the box beam and is fastened to the outer cover plate by bolts. The short end shaft is interference fit with the vertical guide wheel.

7. The driving mechanism of the longitudinal translation type opening bridge according to claim 1 is characterized in that: The movable bridge is provided with a reserved hole, the vertical large pin is inserted into the reserved hole, and the vertical large pin is used to fasten the pin mounting plate and the movable bridge with bolts so that the driving mechanism is fixed on the movable bridge.

8. The driving mechanism of the longitudinal translation type opening bridge according to claim 1 is characterized in that: The difference between the hole diameter of the vertical through hole of the driving slider frame and the shaft diameter of the vertical large pin is 3-5mm.

9. The driving mechanism of the longitudinal translation type opening bridge according to claim 1 is characterized in that: The reduction motor is a reduction motor with a self-locking function, and the ratio of the self-locking force to the power of the reduction motor is 2-3.

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