Active walking and parking type bogie structure and method for molten iron transport vehicle

Abstract

The invention relates to the field of metal casting, in particular to an active walking parking type bogie structure and method for a molten iron transport vehicle. A side frame is fixedly connected to an axle box, a mounting base is fixed to the side frame, a parking mechanism and an active walking mechanism are arranged on one side of the mounting base, and the active walking mechanism is used for driving wheels to actively walk along a railway track; the parking mechanism comprises a parking frame, a first oil cylinder, a brake assembly, a guide shaft and a reset spring. The parking frame is mounted on the side, close to the wheels, of the mounting base, and a first oil cylinder is mounted on the parking frame; guide shafts are fixedly mounted on the parking frame relative to the wheels; a brake assembly is slidably connected to the guide shaft. Flanges are arranged at the ends, close to the wheels, of the guide shafts, and reset springs are arranged between the brake assemblies and the flanges; one side of the brake assembly faces the wheel and corresponds to the side face of the wheel, and the piston rod end of the first oil cylinder is close to the other side of the brake assembly. The functions of self-powered walking and self-braking parking are achieved by improving the structure of the bogie.

Description

Technical Field

[0001] The present invention relates to the field of metal casting, and in particular to an active walking and parking bogie structure and method for a molten iron transport vehicle. Background Art

[0002] Currently, the transportation of molten iron in iron and steel enterprises mainly uses train traction. The molten iron transport vehicle running on the railway consists of three main parts: a vehicle frame, a bogie, and a coupler. Among them, the bogie, as the main mechanism for carrying the upper structure to run, is equipped with structures such as wheelsets, bolster, and side frames. This bogie is a passive walking component without a power walking mechanism and does not have a braking and parking function. Since the molten iron transport vehicle needs to occupy the locomotive for a long time when receiving molten iron and transferring vehicles, it seriously wastes locomotive resources and also increases unnecessary investment in iron and steel enterprises. Moreover, during the parking and transfer processes, the molten iron transport vehicle cannot brake and park itself. When there is no locomotive connection, the molten iron transport vehicle may slide due to the slope of the railway during the parking process, posing a great safety hazard.

[0003] In the prior art, the braking and traction of the molten iron transport vehicle during operation are both completed by the locomotive, and the parking after stopping is achieved by the operator placing an iron shoe on the railway under the wheelset of the bogie to perform the parking and stopping function.

[0004] In this solution, the transfer of the molten iron transport vehicle requires the locomotive to be occupied throughout the process, wasting resources and increasing the enterprise's investment and production costs. The parking requires direct manual operation, and since the operation position is under the wheels, it not only wastes labor but is also extremely unsafe. It is not conducive to the operation and safe use of users and is not conducive to the development of enterprises. Summary of the Invention

[0005] In view of the above problems, the present invention proposes an active walking and parking bogie structure and method for a molten iron transport vehicle, which realizes self-powered running and self-braking and parking functions by improving the bogie structure.

[0006] To achieve the above object, the present invention is realized according to the following technical solutions: An active walking and parking bogie structure for a molten iron transport vehicle, comprising an axle, axle boxes, wheels, a bolster, side frames, mounting seats, a parking mechanism and an active walking mechanism; a wheel is fixedly installed at each end of the axle, axle boxes are respectively installed at both ends of the axle, side frames are fixedly connected to the tops of the axle boxes on the same side, a bolster is arranged between the middle parts of the two side frames, a mounting seat is fixed at one end of the side frame, and a parking mechanism and an active walking mechanism are arranged on one side of the mounting seat. The active walking mechanism is used to drive the wheels to actively walk along the railway track; the parking mechanism includes a parking frame, a first oil cylinder, a braking assembly, a guide shaft and a return spring; the parking frame is installed on the side of the mounting seat close to the wheel, and the first oil cylinder is installed on the parking frame; a guide shaft is fixedly installed on the parking frame in the parallel direction of the axle and opposite to the wheel; the braking assembly is slidably connected to the guide shaft; a stop edge is arranged at one end of the guide shaft close to the wheel, and a return spring is arranged between the braking assembly and the stop edge; one side of the braking assembly faces the wheel and corresponds to the side surface of the wheel, and the piston rod end of the first oil cylinder is close to the other side of the braking assembly.

[0007] In the above technical solution, the parking frame is of a C-shaped groove structure, and the parking frame is semi-encircling and arranged on the side of the wheel. It includes two oppositely arranged side plates and a connecting plate fixedly connected between the two side plates. The side plates correspond to the outer side surfaces of the wheels. A first oil cylinder is symmetrically installed on each of the two side plates, and the guide shafts are correspondingly installed on the two side plates and are symmetrical to each other.

[0008] In the above technical solution, the braking assembly includes a base plate, a positioning plate and a brake pad. The base plate is an arc-shaped plate conforming to the side surface of the wheel. Through holes are opened at both ends of the base plate. A guide shaft is fixedly arranged at the corresponding through hole positions on the two side plates respectively. The base plate is sleeved between the two guide shafts through the through holes; a plurality of positioning plates are fixedly connected at intervals on the side of the base plate facing the wheel, and a plurality of brake pads are fixedly installed at intervals at positions between the plurality of positioning plates.

[0009] In the above technical solution, the active walking mechanism includes a fixed connection seat, a second oil cylinder, a movable seat, a hydraulic motor, a running wheel, a running wheel fixed seat and a running wheel shaft. A fixed connection seat is installed on the side of the parking frame facing away from the wheel. The fixed ends of the two second oil cylinders are respectively hinged on both sides of the fixed connection seat. A pin shaft is respectively fixed on the fixed connection seat below the two second oil cylinders. The middle parts of the two movable seats are respectively rotationally connected to the fixed connection seat through the pin shafts, and the upper ends of the movable seats are hinged to the piston rod ends of the second oil cylinders; a running wheel fixed seat is fixedly connected to the lower part of the movable seat on the side deviating towards the railway track; the hydraulic motor is installed at one end of the running wheel fixed seat, the output end of the hydraulic motor is connected to the running wheel shaft, the running wheel shaft is rotatably installed on the running wheel fixed seat, and the running wheel is connected to the outside of the running wheel shaft; the running wheel can correspondingly contact the railway track.

[0010] In the above technical solution, the traveling wheel fixing seat is in a C shape, with its open side facing the railway track. The hydraulic motor is installed at the upper end of the traveling wheel fixing seat. The output end of the hydraulic motor passes through the upper plate of the traveling wheel fixing seat and is connected to the traveling wheel shaft. The traveling wheel shaft is rotatably installed between the upper plate and the lower plate of the traveling wheel fixing seat. The traveling wheel is connected to the outer side of the part of the traveling wheel shaft located in the inner cavity of the traveling wheel fixing seat.

[0011] In the above technical solution, the traveling wheel fixing seat and the movable seat are connected by a screw. Corresponding positions in the middle of the side plates of the movable seat and the traveling wheel fixing seat are provided with holes. The screw slides through the inner side of the holes. The end of the screw facing the movable seat is connected to a first nut. The other end of the screw extends into the inner cavity of the traveling wheel fixing seat and is connected to a second nut. The part of the screw located between the traveling wheel fixing seat and the movable seat is connected to a third nut. A compensation spring is sleeved on the part of the screw located between the third nut and the movable seat.

[0012] In the above technical solution, the traveling wheel includes an inner metal hub and a rubber tread wrapped around its outer side. The inner side of the metal hub is connected to the traveling wheel shaft by a key.

[0013] In the above technical solution, the shape of the positioning plate is trapezoidal, the brake pads are rectangular, and several brake pads are arranged in an arc.

[0014] The present invention also provides a method for the active walking and parking of a molten iron transport vehicle, which is realized according to the structure of the active walking and parking bogie of the molten iron transport vehicle described in any one of the above. When the molten iron transport vehicle needs to walk by itself, first, the piston rod of the second oil cylinder extends to drive the movable seat to rotate, and then drives the traveling wheel fixing seat and the traveling wheels to rotate. Then, the outer rubber tread of the traveling wheel fits tightly with the side of the railway track. At this time, the hydraulic system is operated to pump oil to make the hydraulic motor rotate, and then drives the traveling wheel shaft to rotate and drives the traveling wheels to rotate, and then drives the entire bogie to walk. When the molten iron transport vehicle needs to be towed, the piston rod of the second oil cylinder retracts backward to drive the traveling wheels away from the side of the railway track. At this time, the bogie does not have the ability to walk and can be towed arbitrarily without interacting with the active walking mechanism. When the molten iron transport vehicle needs to stop during self-walking, the hydraulic system supplies oil to the rodless cavity of the first oil cylinder to make the first oil cylinder act, and the piston rod extends to press against the back of the brake assembly. The front side of the brake assembly clamps on the rim surface of the wheel to prevent the wheel from rotating and realize braking and parking. Before the molten iron transport vehicle needs to be towed away, a parking release operation needs to be performed. At this time, the hydraulic system stops supplying oil to the rodless cavity of the first oil cylinder. At this time, the return spring springs the brake assembly back to its original position, and the piston rod of the first oil cylinder is also pressed backward. The hydraulic oil in the rodless cavity is pressed back into the hydraulic system. At this time, the front side of the brake assembly disengages from the rim surface of the wheel to realize the release operation.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the wheels to actively run along the railway track through the active walking mechanism, avoiding the waste of resources during this waiting process; at the same time, the active walking mechanism drives the bogie to run by itself, reducing the black smoke emitted to the surrounding environment due to the need for the locomotive to continuously idle during the waiting process and during startup and loading, which is beneficial for steel enterprises to meet environmental protection requirements; when the hot metal transporter needs to park, the first oil cylinder is started, and the piston rod end of the first oil cylinder pushes the brake assembly to slide axially along the guide shaft until it abuts against the side of the wheel, preventing the wheel from rotating to achieve braking and parking; when the hot metal transporter needs to be towed away, the hydraulic system stops supplying oil to the first oil cylinder, and under the elastic action of the return spring, the brake assembly slides axially backward along the guide shaft to reset, and the piston rod of the first oil cylinder is also pressed backward, and the brake assembly disengages from the rim surface of the wheel to achieve the release action.

[0016] The active walking and parking type bogie structure of the hot metal transporter of the present invention realizes flexible transportation and improves the environmental protection level through the self-powered running function of the bogie, without the need for locomotive traction when receiving hot metal and transferring vehicles; at the same time, it has a built-in braking and parking function, without the need for locomotive braking and manual operation for parking, saving manpower and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 It is a top view structural schematic diagram of the active walking and parking type bogie structure of the hot metal transporter of the present invention; Figure 2 is Figure 1 a partial enlarged view of part A in Figure 3 It is a front view structural schematic diagram of the parking mechanism and the active walking mechanism; Figure 4 It is a left view structural schematic diagram of the hot metal transporter with the bogie structure of the present invention; Figure 5 is Figure 4 a partial enlarged view of part B in Figure 6 It is a structural schematic diagram of the brake assembly; Figure 7 It is a radial cross-sectional structural schematic diagram of the running wheel; Figure 8Schematic cross-sectional structure diagram of the running wheel axle Reference numerals: 1 - axle; 2 - axle box; 3 - wheel; 4 - bolster; 5 - side frame; 6 - mounting seat; 7 - parking frame; 71 - side plate; 72 - connecting plate; 8 - first oil cylinder; 9 - braking assembly; 91 - base plate; 92 - positioning plate; 93 - brake pad; 10 - guide shaft; 11 - return spring; 12 - locking bolt; 13 - fixed connection seat; 14 - second oil cylinder; 15 - movable seat; 16 - hydraulic motor; 17 - screw; 18 - running wheel; 181 - metal hub; 182 - rubber tread; 19 - running wheel fixing seat; 20 - running wheel axle; 21 - compensation spring; 22 - pin shaft; 23 - nut one; 24 - nut two; 25 - nut three. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention.

[0020] As Figure 1 shown, the embodiments of the present invention provide an active walking and parking type bogie structure for a molten iron transport vehicle, including an axle 1, an axle box 2, a wheel 3, a bolster 4, a side frame 5, a mounting seat 6, a parking mechanism and an active walking mechanism; one wheel 3 is fixedly installed at each end of the axle 1, axle boxes 2 are respectively installed at both ends of the axle 1, side frames 5 are fixedly connected to the tops of the axle boxes 2 on the same side, a bolster 4 is arranged between the middle parts of the two side frames 5, both ends of the bolster 4 are respectively embedded in the central bearing cavities of the side frames 5, a mounting seat 6 is fixed at one end of the side frame 5, and a parking mechanism and an active walking mechanism are arranged on one side of the mounting seat 6. The active walking mechanism is used to drive the wheels to actively walk along the railway track; as Figure 2 shown, the parking mechanism includes a parking frame 7, a first oil cylinder 8, a braking assembly 9, a guide shaft 10 and a return spring 11; the parking frame 7 is installed on the side of the mounting seat 6 close to the wheel 3, the first oil cylinder 8 is installed on the parking frame 7, and the first oil cylinder 8 is a single-acting oil cylinder; a guide shaft 10 is fixedly installed on the parking frame 7 in the parallel direction of the axle 1 and opposite to the wheel 3; a braking assembly 9 is slidably connected to the guide shaft 10; a stop edge is arranged at one end of the guide shaft 10 close to the wheel 3, and a return spring 11 is arranged between the braking assembly 9 and the stop edge; one side of the braking assembly 9 faces the wheel 3 and corresponds to the side surface of the wheel 3, and the piston rod end of the first oil cylinder 8 is close to the other side of the braking assembly 9.

[0021] When the molten iron transport vehicle is receiving molten iron and transferring vehicles, the driving wheels actively run along the railway track through the active walking mechanism, avoiding the waste of resources during this waiting process; at the same time, the active walking mechanism drives the bogie to walk by itself, reducing the black smoke emitted into the surrounding environment due to the need for the locomotive to continuously idle during the waiting process and during startup and loading, which is beneficial for steel enterprises to meet environmental protection requirements; when the molten iron transport vehicle needs to park, the first oil cylinder 8 is started, and the piston rod end of the first oil cylinder 8 pushes the brake assembly 9 to slide axially along the guide shaft 10 until it presses tightly against the side of the wheel 3, preventing the wheel 3 from rotating to achieve braking and parking; when the molten iron transport vehicle needs to be towed away, a release operation needs to be performed. At this time, the hydraulic system stops supplying oil to the first oil cylinder 8. Under the elastic action of the return spring 11, the brake assembly 9 slides backward axially along the guide shaft 10 to reset, and the piston rod of the first oil cylinder 8 is also pressed backward, and the brake assembly 9 disengages from the rim surface of the wheel 3 to achieve the release operation.

[0022] The active walking and parking bogie structure of the molten iron transport vehicle of the present invention realizes flexible transportation and improves the environmental protection level through the self-powered running function of the bogie. When receiving molten iron and transferring vehicles, it does not require locomotive traction; at the same time, it has a self-braking and parking function, does not require locomotive braking and manual operation for parking, saving manpower and reducing safety risks.

[0023] In some embodiments of the present invention, the parking frame 7 is arranged on the side of the wheel 3, and a symmetrical structure is designed in the side area corresponding to the wheel 3. For example, the parking frame 7 is a C-shaped groove structure, and the parking frame 7 is semi-surroundingly arranged on the side of the wheel 3. Specifically, it includes two oppositely arranged side plates 71 and a connecting plate 72 fixedly connected between the two side plates 71. The side plates 71 correspond to the outer side surface of the wheel 3, that is, the rim surface of the wheel 3 is embedded into the inner sides of the two side plates 71. A first oil cylinder 8 is symmetrically installed on each of the two side plates 71. An axial hole is opened on the side plate 71 on one side of the first oil cylinder 8. The rear end of the guide shaft 10 is installed in the axial hole and locked with a locking bolt 12. The guide shafts 10 on both sides are symmetrical to each other.

[0024] Parking mechanisms are installed on the sides of the wheels 3 on both sides. Each side's parking mechanism has a symmetrical structure on both sides of the wheel 3. During parking, through the simultaneous action of two opposite first oil cylinders 8, the brake assemblies 9 on both sides slide axially along the guide shaft 10 until they press tightly against the side of the wheel 3. By applying forces on both sides, the braking force on the wheel 3 is more stable and rapid, realizing precise control of the parking position.

[0025] Such as Figure 6As shown, in a preferred embodiment of the present invention, the braking assembly 9 includes a base plate 91, a positioning plate 92, and a brake pad 93. The base plate 91 is an arc-shaped plate conforming to the side of the wheel 3. Through holes are provided at both ends of the base plate 91. One guiding shaft 10 is fixedly provided at the corresponding through hole positions on the two side plates 71 respectively. The base plate 91 is sleeved between the two guiding shafts 10 through the through holes. By setting the two guiding shafts 10, the guiding effect is more balanced. A number of positioning plates 92 are fixedly connected at intervals on the side of the base plate 91 facing the wheel. A number of brake pads 93 are fixedly installed at intervals at positions between the number of positioning plates 92. By arranging a number of positioning plates 92 at multi-point intervals and distributing a number of brake pads 93 at multiple positions, when braking, forces are applied to the side of the wheel 3 simultaneously in multiple directions at multiple positions, which can better counteract the rotational inertia of the wheel 3 and enhance the braking resistance. The braking effect is significantly better than that of a single-piece brake pad. The brake pads 93 can be conventional commercially available brake pad products or made of conventional brake pad friction materials. The brake pads 93 have a certain thickness, protruding from the base plate 91 on the side of the base plate 91 facing the wheel 3 and contacting and frictionally braking the side of the wheel 3 during braking. Exemplarily, the thickness of the brake pads 93 is 23 mm.

[0026] In a preferred embodiment of the present invention, the positioning plate 92 is trapezoidal in shape, the brake pad 93 is rectangular in shape, and a number of brake pads 93 are arranged in an arc shape. This shape arrangement enables it to conform to the rotation direction of the wheel 3, thereby applying a braking force to the wheel 3 in the reverse direction of the rotation direction.

[0027] As Figures 3 to 5 As shown, in some embodiments of the present invention, the active traveling mechanism includes a fixed connection seat 13, a second oil cylinder 14, a movable seat 15, a hydraulic motor 16, a traveling wheel 18, a traveling wheel fixed seat 19, and a traveling wheel shaft 20. A fixed connection seat 13 is installed on the side of the parking frame 7 facing away from the wheel 3. The fixed ends of the two second oil cylinders 14 are respectively hinged on the symmetric sides of the fixed connection seat 13. The second oil cylinder 14 is a double-acting oil cylinder. A pin shaft 22 is respectively fixed on the fixed connection seat 13 below the two second oil cylinders 14. Ear plates are provided in the middle of the two movable seats 15 and are respectively rotatably connected to the fixed connection seat 13 through the pin shafts 22. The upper end of the movable seat 15 is hinged to the piston rod end of the second oil cylinder 14. The lower part of the movable seat 15 is fixedly connected to the traveling wheel fixed seat 19 on the side deviating towards the railway track. The hydraulic motor 16 is installed at one end of the traveling wheel fixed seat 19. The output end of the hydraulic motor 16 is connected to the traveling wheel shaft 20. The traveling wheel shaft 20 is rotatably installed on the traveling wheel fixed seat 19. The outside of the traveling wheel shaft 20 is connected to the traveling wheel 18. The traveling wheel 18 can be in corresponding contact with the railway track.

[0028] The movable seat 15 is designed in a lever structure. When the piston rod of the second oil cylinder 14 extends, it can drive the movable seat 15 to rotate around the pin shaft 22. The movable seats 15 on both sides close to one side of the railway track until the running wheels 18 contact the railway track. The magnitude of the running force can be adjusted by the magnitude of the jacking force of the second oil cylinder 14. When the hydraulic motor 16 is started, the output end of the hydraulic motor 16 drives the running wheel shaft 20 to rotate, which drives the running wheels 18 to rotate. The running wheels 18 rotate along the railway track to drive the whole bogie to translate. When the piston rod of the second oil cylinder 14 retracts backward, it can drive the running wheels 18 to disengage from the side of the railway track. At this time, the bogie does not have the running ability and can be towed arbitrarily without interacting with the active running mechanism.

[0029] In a preferred embodiment of the present invention, the running wheel fixing seat 19 is in a C shape, and its open side is biased towards the railway track. The hydraulic motor 16 is installed at the upper end of the running wheel fixing seat 19. The output end of the hydraulic motor 16 passes through the upper plate of the running wheel fixing seat 19 and is connected to the running wheel shaft 20. The running wheel shaft 20 is rotatably installed between the upper plate and the lower plate of the running wheel fixing seat 19. The outer side of the part of the running wheel shaft 20 located in the inner cavity of the running wheel fixing seat 19 is connected to the running wheel 18.

[0030] Further preferably, the running wheel fixing seat 19 and the movable seat 15 are connected by a screw 17. Through holes are respectively opened at the corresponding positions in the middle of the side plates of the movable seat 15 and the running wheel fixing seat 19. The screw 17 slidably passes through the inner side of the through holes. The end of the screw 17 biased towards the movable seat 15 is connected to a first nut 23. The other end of the screw 17 extends into the inner cavity of the running wheel fixing seat 19 and is connected to a second nut 24. The part of the screw 17 located between the running wheel fixing seat 19 and the movable seat 15 is connected to a third nut 25. A compensation spring 21 is sleeved on the part of the screw 17 located between the third nut 25 and the movable seat 15.

[0031] While the running wheel fixing seat 19 provides an installation and support basis for the hydraulic motor 16, the running wheel shaft 20 and the running wheels 18, it is movably connected to the movable seat 15 through the screw 17. The part of the screw 17 located between the third nut 25 and the first nut 23 provides a compensation space for the running wheel fixing seat 19. Through the elastic action of the compensation spring 21, the gap that may be generated between the running wheels 18 and the railway track due to the left - right swing of the bogie during the running process can be self - compensated, making the self - running process of the bogie more reliable.

[0032] As Figure 7 shown, in a preferred embodiment of the present invention, the running wheel 18 includes an inner metal hub 181 and a rubber tread 182 wrapped outside it. The rubber tread 182 can increase the friction coefficient with the rail and eliminate the slipping phenomenon during the towing and running process. The inner side of the metal hub 181 is connected to the outer side of the running wheel shaft 20 by a key. AsFigure 8 As shown in the figure, the inner side of the running wheel shaft 20 is connected to the output shaft end of the hydraulic motor 16 in an embedded manner by a tooth-shaped structure.

[0033] A method for the active running and parking of a hot metal transporter provided by the present invention. When the hot metal transporter needs to run by itself, first, the piston rod of the second oil cylinder 14 extends to drive the movable seat 15 to rotate around the pin shaft 22, thereby driving the running wheel fixing seat 19 and the running wheel 18 to rotate. Then, the outer rubber wheel surface 182 of the running wheel 18 is tightly attached to the side surface of the railway track. At this time, the hydraulic system is operated to pump oil to make the hydraulic motor 16 rotate, thereby driving the running wheel shaft 20 to rotate and driving the running wheel 18 to rotate. Then, the entire bogie is driven to run. When the hot metal transporter needs to be towed, the piston rod of the second oil cylinder 14 retracts backward to drive the running wheel 18 away from the side surface of the railway track. At this time, the bogie does not have the ability to run and can be towed arbitrarily without interacting with the active running mechanism. When the hot metal transporter needs to stop during self-running, the hydraulic system supplies oil to the rodless cavity of the first oil cylinder 8 to make the first oil cylinder 8 act to extend the piston rod to press against the back surface of the brake assembly 9. The brake assembly 9 slides axially along the guide shaft 10, and the front brake pads 93 of the brake assembly 9 are clamped on the rim surface of the wheel 3 to prevent the wheel 3 from rotating to achieve braking and parking. Before the hot metal transporter needs to be towed away, a parking release operation needs to be performed. At this time, the hydraulic system stops supplying oil to the rodless cavity of the first oil cylinder 8. At this time, the return spring 11 pushes the brake assembly 9 to return to its original position, and the piston rod of the first oil cylinder 8 is also pressed backward. The hydraulic oil in the rodless cavity is pressed back into the hydraulic system. At this time, the front brake pads 93 of the brake assembly 9 are disengaged from the rim surface of the wheel 3 to achieve the release operation.

[0034] As mentioned above, only the preferred specific embodiments of the present invention are described, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An active walking and parking bogie structure for a molten iron transport vehicle, characterized in that: The invention comprises an axle (1), an axle box (2), a wheel (3), a bolster (4), a side frame (5), a mounting seat (6), a parking mechanism and an active running mechanism; a wheel (3) is fixedly mounted on each end of the axle (1); an axle box (2) is mounted on each end of the axle (1); a side frame (5) is fixedly connected to the top of the axle box (2) on the same side; a bolster (4) is arranged between the middle parts of the side frames (5) on both sides; a mounting seat (6) is fixed on one end of the side frame (5); a parking mechanism and an active running mechanism are arranged on one side of the mounting seat (6); the active running mechanism is used to drive the wheel (3) to actively run along the railway track; the parking mechanism comprises a parking frame (7), a first oil cylinder (8), a brake assembly (9), a guide shaft (10) and a return spring (11); the parking frame (7) is mounted on a side of the mounting seat (6) close to the wheel (3), and a first oil cylinder (8) is mounted on the parking frame (7); a guide shaft (10) is mounted on the parking frame (7) in a parallel direction to the axle (1) and fixedly mounted relative to the wheel (3); a brake assembly (9) is slidably connected to the guide shaft (10); a retaining edge is provided at one end of the guide shaft (10) close to the wheel (3), and a return spring (11) is provided between the brake assembly (9) and the retaining edge; one side of the brake assembly (9) faces the wheel (3) and corresponds to the side of the wheel (3), and the piston rod end of the first oil cylinder (8) is close to the other side of the brake assembly (9).

2. The active walking and parking bogie structure of a molten iron transport vehicle according to claim 1 is characterized in that: The parking frame (7) is a C-shaped groove structure. The parking frame (7) is semi-enclosed and arranged on the side of the wheel (3). It includes two side plates (71) arranged opposite to each other and a connecting plate (72) fixedly connected between the two side plates (71). The side plates (71) correspond to the outer side surfaces of the wheel (3). A first oil cylinder (8) is symmetrically mounted on each of the two side plates (71). The guide shaft (10) is correspondingly mounted on the two side plates (71) and is symmetrical to each other.

3. The active walking and parking bogie structure of a molten iron transport vehicle according to claim 2 is characterized in that: The brake assembly (9) comprises a base plate (91), a positioning plate (92) and a brake pad (93); the base plate (91) is an arc-shaped plate conforming to the side of the wheel (3); through holes are provided at both ends of the base plate (91); a guide shaft (10) is fixedly arranged at the position corresponding to the through holes on the two side plates (71); the base plate (91) is sleeved between the two guide shafts (10) through the through holes; a plurality of positioning plates (92) are fixedly connected to the side of the base plate (91) facing the wheel (3) at intervals, and a plurality of brake pads (93) are fixedly installed at intervals between the plurality of positioning plates (92).

4. The active walking and parking bogie structure of a molten iron transport vehicle according to claim 3 is characterized in that: The active walking mechanism includes a fixed connection seat (13), a second oil cylinder (14), a movable seat (15), a hydraulic motor (16), a traveling wheel (18), a traveling wheel fixed seat (19), and a traveling wheel shaft (20). A fixed connection seat (13) is installed on the side of the parking frame (7) facing away from the wheels (3). The fixed ends of two second oil cylinders (14) are respectively hinged on both sides of the fixed connection seat (13). A pin shaft (22) is fixed on the fixed connection seat (13) respectively on the lower sides of the two second oil cylinders (14). The middle parts of the two movable seats (15) are respectively rotationally connected to the fixed connection seat (13) through the pin shafts (22). The upper ends of the movable seats (15) are hinged to the piston rod ends of the second oil cylinders (14). The lower part of the movable seat (15) is fixedly connected to the traveling wheel fixed seat (19) on the side deviating towards the railway track. The hydraulic motor (16) is installed at one end of the traveling wheel fixed seat (19). The output end of the hydraulic motor (16) is connected to the traveling wheel shaft (20). The traveling wheel shaft (20) is rotatably installed on the traveling wheel fixed seat (19). The outer side of the traveling wheel shaft (20) is connected to the traveling wheel (18). The traveling wheel (18) can be in corresponding contact with the railway track.

5. The active walking and parking bogie structure of a molten iron transport vehicle according to claim 4 is characterized in that: The traveling wheel fixed seat (19) is in a C shape, and its open side deviates towards the railway track. The hydraulic motor (16) is installed at the upper end of the traveling wheel fixed seat (19). The output end of the hydraulic motor (16) passes through the upper plate of the traveling wheel fixed seat (19) and is connected to the traveling wheel shaft (20). The traveling wheel shaft (20) is rotatably installed between the upper plate and the lower plate of the traveling wheel fixed seat (19). The outer side of the part of the traveling wheel shaft (20) located in the inner cavity of the traveling wheel fixed seat (19) is connected to the traveling wheel (18).

6. The active walking and parking bogie structure of a molten iron transport vehicle according to claim 5, characterized in that: The traveling wheel fixed seat (19) is connected to the movable seat (15) through a screw rod (17). Through holes are respectively formed at the corresponding positions in the middle of the side plates of the movable seat (15) and the traveling wheel fixed seat (19). The screw rod (17) slidably passes through the inner side of the through holes. The end of the screw rod (17) deviating towards the movable seat (15) is connected to a first nut (23). The other end of the screw rod (17) extends into the inner cavity of the traveling wheel fixed seat (19) and is connected to a second nut (24). The part of the screw rod (17) located between the traveling wheel fixed seat (19) and the movable seat (15) is connected to a third nut (25). A compensation spring (21) is sleeved on the part of the screw rod (17) located between the third nut (25) and the movable seat (15).

7. The active walking and parking bogie structure of a molten iron transport vehicle according to claim 6 is characterized in that: The traveling wheel (18) includes a metal hub (181) on the inner layer and a rubber tread (182) wrapped on its outer side. The inner side of the metal hub (181) is connected to the traveling wheel shaft (20) in a keyway fit.

8. The active walking and parking bogie structure of a molten iron transport vehicle according to claim 7 is characterized in that: The positioning plate (92) is trapezoidal in shape, the brake pads (93) are rectangular, and several brake pads (93) are arranged in an arc.

9. A method for active walking and parking of a molten iron transport vehicle, characterized in that: The method is realized by the active walking parking bogie structure of the molten iron transport vehicle according to any one of claims 1 to 8. When the molten iron vehicle needs to move by itself, firstly, the piston rod of the second oil cylinder (14) extends to drive the movable seat (15) to rotate, thereby driving the running wheel fixing seat (19) and the running wheel (18) to rotate, and then the outer rubber wheel surface (182) of the running wheel (18) and the side of the railway track are tightly fitted. At this time, the hydraulic system pump oil is operated to rotate the hydraulic motor (16), thereby driving the running wheel shaft (20) to rotate and driving the running wheel (18) to rotate, and then driving the entire bogie to achieve walking; When the molten iron vehicle needs to be towed, the second oil cylinder (14) retracts the piston rod backwards to drive the running wheel (18) away from the side of the railway track. At this time, the bogie has no running ability and can be towed arbitrarily without interacting with the active running mechanism. When the molten iron transport vehicle needs to stop during self-propelled travel, the hydraulic system supplies oil to the rodless chamber of the first oil cylinder (8), causing the first oil cylinder (8) to actuate, extending the piston rod to press against the back of the brake assembly (9), and the front side of the brake assembly (9) is clamped on the rim surface of the wheel (3), preventing the wheel (3) from rotating to achieve brake parking; Before the molten iron transport vehicle needs to be towed away, a parking release action is required. At this time, the hydraulic system stops supplying oil to the rodless chamber of the first oil cylinder (8). At this time, the return spring (11) pops open and resets the brake assembly (9). The piston rod of the first oil cylinder (8) is also pressed back backwards, and the hydraulic oil in the rodless chamber is pressed back into the hydraulic system. At this time, the front side of the brake assembly (9) is separated from the rim surface of the wheel (3), thereby achieving a release action.

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