Flat car with single-axle bogie

Abstract

The utility model discloses a flat car with a single-shaft bogie, and belongs to the technical field of rail engineering trucks. Comprising a flat car, two single-shaft bogies, two damping devices and two rotary limiting devices, each single-shaft bogie comprises a framework, a wheel pair, a braking device, a vibration reduction device, a center plate assembly and an annular side bearing device, each damping device comprises two dampers, and each rotary limiting device comprises two check blocks; a limiting protrusion is arranged in the middle of the rear side or the middle of the front side of the framework and located between the two check blocks. The framework is rotationally arranged on the flat car through the center plate assembly, and the annular side bearing device is arranged around the center plate assembly and comprises an outer rotating guide ring and an inner rotating guide ring; the outer rotating guide ring is fixed on the framework, and an annular groove is formed in the inner wall of the outer rotating guide ring; the inner rotating guide ring is positioned on the adjacent inner side of the outer rotating guide ring, and a convex ring is coaxially arranged on the outer wall; the convex ring is located in the annular groove, and floating gaps are formed between the three edges of the convex ring and the corresponding sides of the annular groove; and the center plate assembly and the inner rotating guide ring are fixed on the flat car.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail engineering vehicles, and particularly relates to a flatbed vehicle with a single-axle bogie. Background Art

[0002] Rail engineering vehicles, such as shunting locomotives and track maintenance locomotives, usually include: a car body, on-board equipment and a bogie; the bogie is arranged at the lower part of the car body to support the car body and on-board equipment so that the rail engineering vehicle can travel along the track; the on-board equipment is installed on the car body or the bogie, and the on-board equipment is used to perform corresponding operations. In the related art, the bogie of a rail engineering vehicle is usually provided with two or three bogies. However, the two or three bogies have a complex structure, not only have a large deadweight, but also have a high cost. In the prior art, for some rail engineering vehicles with lower requirements, a single-axle bogie can be used. The axle bogie has only one axle, and its structural form and operating performance are very different from those of traditional bogies.

[0003] For example, the patent with application number CN201910747182.1 discloses a single-axle bogie, which includes a wheelset and axle boxes arranged at both ends of the wheel axle of the wheelset, the bogie also includes a frame, a primary suspension device and a secondary suspension device, the frame includes two side beams and two end beams, the frame is in a U-shape, the primary suspension device is located between the side beams of the frame and the axle box, and the secondary suspension device is located above the side beams of the frame.

[0004] For example, the patent with application number CN202010910628.0 discloses a single-axle bogie, comprising: a single wheelset, the two wheels of the wheelset are pressed onto the same axle, and the two ends of the axle protrude from the two wheels respectively; two axle boxes, respectively mounted on the two ends of the axle and located outside the wheels; a series of suspension devices, fixed on the two axle boxes; a Japanese-shaped frame, the frame comprising two parallel side beams, two parallel cross beams and an intermediate longitudinal beam, the side beams and the cross beams form a closed frame, the intermediate longitudinal beam is arranged in parallel between the two side beams and the two ends of the intermediate longitudinal beam are respectively fixed to the two cross beams; the two side beams are respectively located and connected to the two series of suspension devices; wherein the intermediate longitudinal beam is used to strengthen the strength of the frame and provide an installation interface.

[0005] For example, the patent with application number CN201621336524.9 discloses a single-axle bogie for railway vehicles, including a wheelset assembly, an axle box assembly, a suspension device, a basic braking device and a positioning device, wherein the suspension device is a leaf spring suspension device, one end of which is located on the top of the axle box assembly, and the other end is connected to the bottom of the vehicle; the basic braking device is a loose double-sided brake shoe brake device, which is suspended on the vehicle body frame; one end of the positioning device is connected to the vehicle body frame, and the other end is clearance-fitted with the axle box assembly, and a wear plate is welded on the positioning device, and the wear plate and the axle box assembly rub during the operation of the vehicle.

[0006] For example, the patent with application number CN201810847700.2 discloses a single-axle bogie, including a frame, an axle box is respectively installed at both ends of the bottom surface of the frame, a wheel axle assembly is installed between the two axle boxes, a series of damping spring assemblies are arranged between the axle boxes and the frame, a brake assembly is respectively installed at the positions of the wheels of the wheel axle assembly at both ends of the bottom surface of the frame, a center plate pin is provided in the middle of the top surface of the frame, a frame connection assembly is respectively provided at both ends of the top surface of the frame, and the frame connection assembly includes a frame connection plate, the A frame limit connecting seat protruding upward is provided in the middle of the frame connecting plate, and the frame limit connecting seat is a square cavity structure. A frame connecting long hole is provided on the top surface of the frame limit connecting seat in the longitudinal direction, and an I-shaped connecting piece is inserted in the frame connecting long hole. A second-series rubber spring assembly is respectively clamped at both longitudinal ends of the frame connecting plate, and the second-series rubber spring assembly includes a second-series rubber spring mounting plate and a second-series rubber spring. The lower end of the second-series rubber spring is clamped on the frame connecting plate, and the upper end of the second-series rubber spring is vulcanized on the second-series rubber spring mounting plate.

[0007] It can be seen from the above patents that the existing single-axle bogie has no steering structure and the center distance between the two axles is relatively long, which makes it easy for the flatbed truck to derail when passing through a curve, causing a safety accident. Utility Model Content

[0008] In order to solve the above problems, the embodiment of the utility model provides a flatbed car with a single-axle bogie, with a center plate assembly and an annular side bearing device as the steering structure, the center plate assembly is a common structure, the annular side bearing device is used as the side bearing structure, the damping device and the rotation limit device limit the rotation and return the single-axle bogie; under the advantage of the simple structure of the single-axle bogie itself, it can also avoid turning derailment; reduce the cost of the flatbed car. The technical solution is as follows:

[0009] The utility model provides a flatbed vehicle with a single-axle bogie, comprising a flatbed vehicle 7 arranged in the front-to-back direction and two single-axle bogies 8 arranged side by side in the front-to-back direction at the bottom thereof, wherein the single-axle bogie 8 comprises a frame 1 arranged in the front-to-back direction, a wheelset 2 arranged in the left-to-right direction at the lower side of the frame 1, a braking device 3 on the frame 1 and matched with the wheelset 2, and a vibration reduction device 4 between the wheelset 2 and the frame 1; the flatbed vehicle with the single-axle bogie also comprises a damping device 9 on the front or rear side of the single-axle bogie 8 and a rotation limiting device on the other side of the single-axle bogie 8 10, the damping device 9 and the rotation limiting device 10 are both arranged at the bottom of the flatbed trolley 7, the damping device 9 includes two dampers arranged in a V shape or an eight-shaped shape; the two dampers are symmetrically arranged on the left and right sides of the perpendicular midline of the wheelset 2, and the ends close to each other are fixed to the bottom of the flatbed trolley 7, and the ends away from each other are respectively fixed to the left and right ends of the front or rear side of the frame 1; the middle part of the rear side or the middle part of the front side of the frame 1 and at the rotation limiting device 10 are provided with a limiting protrusion 17, and the rotation limiting device 10 includes left and right side-by-side arranged at the bottom of the flatbed trolley 7 The limiting protrusion 17 is located in the middle position between the two stoppers; the single-axle bogie 8 also includes a core plate assembly 5 and an annular side bearing device 6 on the upper side of the frame 1, and the frame 1 is rotatably arranged at the bottom of the flatbed vehicle 7 through the core plate assembly 5, and the core plate assembly 5 is located directly above the middle of the wheelset 2; the annular side bearing device 6 is arranged around the core plate assembly 5 and includes an outer rotating guide ring 61 and an inner rotating guide ring 62, both of which are circular ring structures; the outer rotating guide ring 61 is fixed on the frame 1, and a ring groove 63 is coaxially arranged on its inner wall; The inner rotating guide ring 62 is coaxially arranged with the outer rotating guide ring 61, and is located on the adjacent inner side of the outer rotating guide ring 61. It is coaxially arranged outside the core disk assembly 5, and its upper side is higher than the upper side of the outer rotating guide ring 61 and is flush with the upper side of the core disk assembly 5. It is located above the frame 1, and a convex ring 64 cooperating with the annular groove 63 is coaxially arranged on its outer wall; the convex ring 64 is located in the annular groove 63 and has floating gaps 65 between its three sides and the corresponding sides of the annular groove 63; the upper side of the core disk assembly 5 and the upper side of the inner rotating guide ring 62 are both fixed to the bottom of the flatbed truck 7.

[0010] Furthermore, the two dampers in the embodiment of the utility model are arranged in a V shape, and the dampers include spring dampers or hydraulic dampers. A hinge seat 71 is provided at the bottom of the flatbed truck 7 and directly in front of or directly behind the frame 1, and the hinge seat 71 is an L-shaped plate arranged along the left and right directions; the upper end of the vertical plate of the L-shaped plate is fixed to the bottom of the flatbed truck 7, and the horizontal plate is located at the lower end of the vertical plate and on the side of the vertical plate close to the single-axle bogie 8; the two dampers are hinged to the lower side of the horizontal plate through a vertically arranged rotating shaft, and a third reinforcing rib 72 is provided along the front-to-back direction between the side of the vertical plate away from the single-axle bogie 8 and the bottom of the flatbed truck 7.

[0011] Among them, the rotation limiting device 10 in the embodiment of the utility model includes a bottom plate, a side plate, two blocks and two fourth reinforcing ribs 73; the side plate is arranged along the left and right directions, and its left and right ends are respectively fixed on the side of the two blocks away from the single-axle bogie 8; the bottom plate is located below the limiting protrusion 17, and it is arranged along the left and right directions, and its left and right ends are respectively fixed on the lower side of the two blocks; the two fourth reinforcing ribs 73 are respectively arranged on the two blocks, and the fourth reinforcing ribs are arranged between the side of the block away from the limiting protrusion 17 and the bottom of the flatbed car 7 and they are arranged along the left and right directions.

[0012] Specifically, the damping device 9 in the embodiment of the utility model is located on the side of the single-axle bogie 8 close to the middle of the flatbed vehicle 7, and the rotation limiting device 10 is located on the side of the single-axle bogie 8 away from the middle of the flatbed vehicle 7.

[0013] Among them, the center plate assembly 5 in the embodiment of the utility model includes a lower center plate 51, an upper center plate 52 and a center pin 53, the lower center plate 51 is fixed on the upper side of the frame 1 and its axis is located on the mid-vertical line of the wheelset 2, the upper center plate 52 is located on the upper side of the lower center plate 51 and is coaxially arranged with the lower center plate 51; the center pin 53 downwardly penetrates the axis of the upper center plate 52 and the lower center plate 51 and its lower part is fixedly connected to the frame 1; the inner rotating guide ring 62 is coaxially arranged outside the upper center plate 52, and its upper side is flush with the upper side of the upper center plate 52; the upper side of the upper center plate 52 and the upper part of the center pin 53 are fixed on the flatbed truck 7.

[0014] Furthermore, the bottom of the flatbed car 7 in the embodiment of the utility model is provided with two fixing plates 74 for fixing the single-axle bogie 8; the fixing plate 74 is a circular plate coaxially arranged with the annular side bearing device 6, and its diameter is larger than the outer diameter of the outer rotating guide ring 61, and a circular hole for the center pin 53 to pass through is provided at its center; the upper sides of the upper center plate 52 and the inner rotating guide ring 62 are welded and fixed to the lower side of the fixing plate 74, and the center pin 53 is a vertically downward bolt and its head is against the upper side of the fixing plate 74.

[0015] Among them, the frame 1 in the embodiment of the utility model includes a support plate 11 and a crossbeam 12 and two longitudinal beams 13 on the lower side thereof, the core plate assembly 5 and the annular side bearing device 6 are both arranged on the upper side of the support plate 11; the two longitudinal beams 13 are arranged side by side left and right, and they are both arranged in the front-to-back direction. They are symmetrically arranged with respect to the mid-vertical line of the wheelset 2, and they are respectively located at the left and right ends of the support plate 11, and they are located between the two rail wheels of the wheelset 2. They are composed of two longitudinal plates arranged side by side left and right; the crossbeam 12 is located between the two longitudinal beams 13, and it is arranged in the left-right direction. Two fixing pins 16 for fixing the rotating shaft of the wheelset 2 are arranged side by side left and right at its lower part, and they are composed of The invention is composed of two transverse plates; the longitudinal plate is arranged in the front-to-back direction, the transverse plate is arranged in the left-to-right direction, and the lower part of the longitudinal plate is provided with an inverted U-shaped notch in the vertical direction for the rotation shaft to pass through; the fixing pin 16 is arranged in the front-to-back direction, and it abuts against the lower side of the rotation shaft, and its front and rear ends are respectively fixed on the two transverse plates, and it is arranged close to the longitudinal beam 13 on the corresponding side; the damping device 9 and the rotation limiting device 10 are both located between the two longitudinal beams 13, and the rotation shaft is located between the two transverse plates; the vibration reduction device 4 includes two vibration reduction units arranged side by side on the left and right, and the two vibration reduction units are respectively located in the two longitudinal beams 13, and the vibration reduction unit is located between the two longitudinal plates and between the rotation shaft and the support plate 11.

[0016] Specifically, the support plate 11 in the embodiment of the utility model includes a circular plate in the middle and two strip plates on the left and right sides of the circular plate, the outer side of the circular plate is flush with the outer side of the strip plate on the corresponding side, the two strip plates are respectively located directly above the two longitudinal beams 13 and are both arranged in the front-to-back direction, the circular plate is coaxially arranged with the annular side bearing device 6 and its size is matched with the outer rotating guide ring 61, the core plate assembly 5 and the annular side bearing device 6 are both arranged on the upper side of the circular plate, the transverse plate is fixed on the lower side of the circular plate and its two ends are fixedly connected to the longitudinal plates on the corresponding sides, the longitudinal plate is fixed on the lower side of the strip plate, the limiting protrusion 17 is arranged in the front-to-back direction and is arranged in the middle of the front side or the middle of the rear side of the circular plate, and the damper is hinged to the intersection of the circular plate and the strip plate through a vertically arranged rotating shaft.

[0017] Among them, the braking device 3 in the embodiment of the utility model includes two or four braking units, and the braking units are arranged in the front and rear directions; if there are two braking units, the two braking units are respectively arranged at one end of the two longitudinal beams 13 away from the middle of the flatbed car 7, and the braking unit and the rotation limit device 10 are located on the same side; if there are four braking units, a braking unit is respectively provided at the front and rear of the two longitudinal beams 13, and the two braking units on the same longitudinal beam 13 are arranged opposite to each other and are respectively located on the front and rear sides of the rail wheel on the corresponding side.

[0018] Specifically, the length of the flatbed truck 7 in the embodiment of the utility model is 7.5-9.5m, and its width is 1.5-1.7m; the distance between the two wheel pairs 2 is 5-6m; the depth of the annular groove 63 is 25-35mm, and its width is 40-60mm; the outer diameter of the inner rotating guide ring 62 is 400-500mm; the outer diameter of the outer rotating guide ring 61 is 650-700mm and the gap between it and the inner rotating guide ring 62 is 5-10mm, and the floating gap 65 is 5-8mm.

[0019] The beneficial effects brought about by the technical solution provided by the embodiment of the utility model are as follows: the embodiment of the utility model provides a flatbed car with a single-axle bogie, with a center plate assembly and an annular side bearing device as the steering structure, the center plate assembly is a common structure, the annular side bearing device is used as the side bearing structure, the damping device and the rotation limit device limit and return the rotation of the single-axle bogie; with the advantage of the simple structure of the single-axle bogie itself, it can also avoid derailment during turning; and reduce the cost of the flatbed car. In addition, the shock absorbing device of this patent has a simple structure and is easy to maintain; the wheelset is simple to install and maintain, and the wheelset can be removed by removing the fixing pin. The frame has high strength under the premise of a relatively simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a flatbed car with a single-axle bogie with unilateral braking of the patent;

[0021] Figure 2 It is a side view of a flatbed car with a single-axle bogie with a single-side brake of the present patent;

[0022] Figure 3 It is a cross-sectional view of a flatbed car with a single-axle bogie with a single-side brake of the present patent;

[0023] Figure 4 yes Figure 1 A partial enlarged view of

[0024] Figure 5 It is a structural schematic diagram of a flatbed car with a single-axle bogie and double-sided brakes of the present patent;

[0025] Figure 6 It is a structural schematic diagram of a single-axle bogie with unilateral braking;

[0026] Figure 7 It is a top view of a single-axle bogie with unilateral braking;

[0027] Figure 8 yes Figure 7 AA section view;

[0028] Fig. 9 yes Figure 8 BB section view;

[0029] Fig.10 It is a structural diagram of the framework;

[0030] Fig.11 It is a structural schematic diagram of the annular side bearing device;

[0031] Fig.12 yes Fig.10 sectional view of .

[0032] In the figure: 1 frame, 2 wheelset, 3 brake device, 4 vibration reduction device, 5 center plate assembly, 6 annular side bearing device, 7 flatbed car, 8 single-axle bogie, 9 damping device, 10 rotation limit device;

[0033] 11 support plate, 12 cross beam, 13 longitudinal beam, 14 first reinforcing rib, 15 second reinforcing rib, 16 fixing pin, 17 limiting protrusion;

[0034] 31 first connecting plate, 32 second connecting plate, 33 brake cylinder, 34 brake shoe, 35 brake base;

[0035] 41 support block, 42 ​​soft vibration damping plate;

[0036] 51 lower center plate, 52 upper center plate, 53 center pin;

[0037] 61 outer rotating guide ring, 62 inner rotating guide ring, 63 ring groove, 64 convex ring, 65 gap, 66 oil cup, 67 fixing bolt;

[0038] 71 is an articulated seat, 72 is a third reinforcing rib, 73 is a fourth reinforcing rib, and 74 is a fixing plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0040] Example 1

[0041] See also Figure 1-46-12, Example 1 provides a flatbed car with a single-axle bogie, and the wheelset 2 adopts unilateral braking. The flatbed car with a single-axle bogie includes a flatbed car 7, two single-axle bogies 8, two damping devices 9 (used to rotate the single-axle bogie 8 back to its original position, so that the wheelset 2 remains arranged in the left and right directions; at the same time, when the rail wheel encounters a foreign object while running on the rail surface, the wheel tread is separated from the rail surface, and the damping device 9 can ensure that the bogie does not have an angle deviation relative to the rail surface for a short time, thereby preventing the wheel from derailing) and two rotation limit devices 10 (used to limit the rotation angle of the single-axle bogie 8), etc. Among them, the flatbed car 7 is arranged in the front and rear directions, and its length can be specifically 7.5-9.5m, and its width can be specifically 1.5-1.7m. The two single-axle bogies 8, the two damping devices 9 and the two rotation limit devices 10 are all arranged at the bottom of the flatbed car 7. The two single-axle bogies 8 are respectively arranged at the front and rear of the flatbed car 7; specifically, the distance between the two wheelsets 2 is 5-6m. Each single-axle bogie 8 is provided with a damping device 9 and a rotation limiting device 10. The damping device 9 is provided on the front side or the rear side of the single-axle bogie 8, and the rotation limiting device 10 is provided on the other side (rear side or front side) of the single-axle bogie 8. Specifically, the damping device 9 is located on the side of the single-axle bogie 8 close to the middle of the flatbed vehicle 7, and the rotation limiting device 10 is located on the side of the single-axle bogie 8 away from the middle of the flatbed vehicle 7.

[0042] The single-axle bogie 8 includes a frame 1, a wheelset 2, a brake device 3, a damping device 4 (reducing the vibration of the vehicle body, thereby ensuring the stability of the vehicle body), a center plate assembly 5 (transmitting traction and bearing weight) and an annular side bearing device 6 (thereby replacing the existing side bearing structure, making the single-axle bogie structure simpler, ensuring that the upper center plate and the lower center plate are in good contact when the vehicle starts and brakes in an emergency, and preventing the vehicle from overturning in this state). The frame 1 is arranged in the front-to-back direction, and is rotatably arranged at the bottom of the flatbed vehicle 7 through the center plate assembly 5. A limiting protrusion 17 is provided at the middle of the rear side or the middle of the front side and at the rotation limiting device 10, which includes a support plate 11 and a cross beam 12 on its lower side and two longitudinal beams 13. The damping device 9 and the rotation limiting device 10 are both located between the two longitudinal beams 13. The wheelset 2 is arranged in the left-right direction, and is an axle box-free wheelset, which includes a rotating shaft and rail wheels at both ends thereof. The brake device 3 is arranged on the frame 1, which cooperates with the wheelset 2. Specifically, it can be a brake structure driven by a cylinder, which can adopt single-side braking (single-side braking is adopted in this embodiment) or double-side braking. The vibration reduction device 4 is arranged between the wheelset 2 and the frame 1, and it includes two vibration reduction units arranged side by side on the left and right. The center plate assembly 5 is arranged in the middle of the upper side of the frame 1, which can realize the steering of the frame 1. It is located directly above the middle of the wheelset 2, and it includes a lower center plate 51, an upper center plate 52 and a center pin 53. The annular side bearing device 6 is arranged on the upper side of the frame 1, which is arranged around the center plate assembly 5. It includes an outer rotating guide ring 61 and an inner rotating guide ring 62, and it plays the role of a side bearing.

[0043] Among them, the center plate assembly 5 in this embodiment can refer to application numbers CN200920086863.X, CN202222838425.2, CN200710014858.3, etc. The lower center plate 51 and the upper center plate 52 are circular structures that cooperate with each other, and the axis centers of the lower center plates 51 are provided with center holes for the center pin 53 to pass through in the vertical direction. The lower center plate 51 is fixed on the upper side of the frame 1 (specifically a circular plate) and its axis center is located on the median perpendicular line (vertical setting) of the wheelset 2. The upper center plate 52 is located on the upper side of the lower center plate 51 and is coaxially arranged with the lower center plate 51. The center pin 53 is arranged vertically, and it passes through the axis centers of the upper center plate 52 and the lower center plate 51 downward, and its lower part is fixedly connected to the frame 1. The outer rotating guide ring 61 is fixed on the frame 1, and a ring groove 63 is coaxially arranged on its inner wall. The inner rotating guide ring 62 is coaxially arranged with the outer rotating guide ring 61, and is located on the adjacent inner side of the outer rotating guide ring 61 (the gap between the outer rotating guide ring 61 and the inner rotating guide ring 62 is 5-10mm). It is located outside the core plate assembly 5, and is coaxially arranged with the core plate assembly 5. Its upper side is higher than the upper side of the outer rotating guide ring 61 and is flush with the upper side of the upper core plate 52. It is located above the frame 1, and a convex ring 64 coaxially arranged on its outer wall is matched with the annular groove 63. The upper side of the inner rotating guide ring 62 and the upper side of the upper core plate 52 are both fixedly connected to the bottom of the flatbed car 7. The convex ring 64 is located in the annular groove 63, and there is a floating gap 65 (specifically 5-8mm) between its three sides and the corresponding sides of the annular groove 63. An oil cup 66 connected to the annular groove 63 is arranged on the outer side of the outer rotating guide ring 61, and the outer rotating guide ring 61 is fixed to the frame 1 by a plurality of fixing bolts 67 (specifically 10). Five fixing bolts 67 are located at the front of the outer rotating guide ring 61 and between the two longitudinal beams 13; another five fixing bolts 67 are located at the rear of the outer rotating guide ring 61 and between the two longitudinal beams 13. Furthermore, two fixing plates 74 (two fixing plates 74 are arranged side by side front and back) for fixing the single-axle bogie 8 are provided at the bottom of the flatbed car 7. The fixing plate 74 is a circular plate coaxially arranged with the annular side bearing device 6, and its diameter is larger than the outer diameter of the outer rotating guide ring 61. A circular hole (specifically a circular hole slightly larger than the center pin 53) is provided at the center of the circle for the center pin 53 to pass through. The upper sides of the upper center plate 52 and the inner rotating guide ring 62 are both welded and fixed to the lower side of the fixing plate 74. The center pin 53 is a vertically downward bolt, whose head rests on the upper side of the fixing plate 74, and whose lower part is threadedly connected to the support plate 41.

[0044] Specifically, the cross-sections of the annular groove 63 and the convex ring 64 in the embodiment of the utility model are both rectangular. The depth of the annular groove 63 is 25-35 mm, and its width is 40-60 mm. The outer diameter of the inner rotating guide ring 62 is 480-540 mm. The outer diameter of the outer rotating guide ring 61 is 650-700 mm.

[0045] Among them, the damping device 9 includes two dampers arranged in a V shape or an eight-shaped shape; specifically, the two dampers are arranged in a V shape. The two dampers are arranged symmetrically with respect to the median perpendicular line of the wheelset 2 (arranged in the front-to-back direction), and the ends close to each other are fixed to the bottom of the flatbed 7, and the ends away from each other are respectively fixed to the left and right ends of the front or rear side of the frame 1. The damper includes a spring damper or a hydraulic damper, etc., and its telescopic stroke is less than 100mm. An articulated seat 71 is provided at the bottom of the flatbed 7 and located directly in front of or directly behind the frame 1. The articulated seat 71 is an L-shaped plate (including a vertical plate and a horizontal plate) arranged in the left-right direction. The upper end of the vertical plate (vertically arranged) is fixed to the bottom of the flatbed 7, and the horizontal plate (horizontally arranged) is located at the lower end of the vertical plate and is located on the side of the vertical plate close to the single-axle bogie 8. Both dampers are hinged to the lower side of the horizontal plate through a vertically arranged rotating shaft, and a third reinforcing rib 72 is provided between the side of the vertical plate away from the single-axle bogie 8 and the bottom of the flatbed vehicle 7 along the front-to-back direction.

[0046] Among them, the rotation limit device 10 includes a bottom plate, a side plate, two blocks and two fourth reinforcing ribs 73, etc. The bottom plate and the side plate are specifically rectangular plates. The two blocks are located in front of or behind the support plate 11 (specifically a circular plate) and cooperate with the limiting protrusion 17 (by blocking and limiting). The two blocks are arranged side by side at the bottom of the flatbed car 7. The limiting protrusion 17 is located in the middle position between the two blocks, and the distance between its left and right sides and the corresponding side blocks is to ensure that the single-axle bogie 8 rotates within a certain rotation angle (such as 10°). The rotation limit device 10 and the damping device 9 are to be arranged in coordination. The side plate is arranged in the left and right directions, and its left and right ends are respectively fixed to the side of the two blocks away from the single-axle bogie 8. The bottom plate is located below the limiting protrusion 17, and it is arranged in the left and right directions, and its left and right ends are respectively fixed to the lower side of the two blocks. Two fourth reinforcing ribs 73 are respectively arranged on two stoppers, and the fourth reinforcing ribs are arranged between the side of the stopper away from the limiting protrusion 17 and the bottom of the flatbed trolley 7 and are arranged in the left-right direction. Among them, the center plate assembly 5 and the annular side bearing device 6 in the embodiment of the utility model are both arranged on the upper side of the support plate 11; the support plate 11 includes a circular plate in the middle and two strip plates on the left and right sides of the circular plate, and the outer side of the circular plate is flush with the outer side of the strip plates on the corresponding side. The two strip plates are respectively located directly above the two longitudinal beams 13 and are both arranged in the front-back direction. The circular plate and the annular side bearing device 6 are coaxially arranged and their size matches the outer rotating guide ring 61 (the diameter of the circular plate is almost the same as the outer diameter of the outer rotating guide ring 61). The center plate assembly 5 and the annular side bearing device 6 are both arranged on the upper side of the circular plate; the limiting protrusion 17 is arranged in the front-back direction and is arranged in the middle of the front side or the middle of the rear side of the circular plate, specifically located on the center line of the flatbed trolley 7. The damper is hinged at the intersection of the circular plate and the strip plate through a vertically arranged rotating shaft. The lower center plate 51 and the outer rotating guide ring 61 are fixed on the upper side of the circular plate. The transverse plate is fixed on the lower side of the circular plate and its left and right ends are fixedly connected to the longitudinal plates on the corresponding sides, and the longitudinal plates are fixed on the lower side of the strip plate. Two longitudinal beams 13 are arranged side by side on the left and right, and they are all arranged in the front-to-back direction. They are arranged symmetrically on the left and right sides with the mid-vertical line of the wheelset 2 (arranged in the front-to-back direction). They are respectively located at the left and right ends of the support plate 11. They are located between the two track wheels of the wheelset 2. They are composed of two longitudinal plates (arranged in the front-to-back direction) arranged side by side on the left and right. The cross beam 12 is located between the two longitudinal beams 13. It is arranged in the left-right direction. Two fixing pins 16 (arranged in the front-to-back direction) for fixing the rotating shaft of the wheelset 2 are arranged side by side on the left and right sides of the lower part. It is composed of two transverse plates (arranged in the left-to-right direction) arranged side by side on the front and back sides and respectively located on the front and rear sides of the rotating shaft. The lower part of the longitudinal plate is provided with an inverted U-shaped notch along the vertical direction for the shaft to pass through. The fixing pin 16 is against the lower side of the shaft, and its front and rear ends are respectively fixed on the two transverse plates, and it is arranged close to the longitudinal beam 13 on the corresponding side. The shaft is located between the two transverse plates, and it is located in the inverted U-shaped notch, and its left and right ends extend outward relative to the longitudinal beam 13 on the corresponding side. Two vibration reduction units are respectively located in the two longitudinal beams 13, and the vibration reduction unit is located between the two longitudinal plates and between the shaft and the support plate 11.Furthermore, a plurality of (specifically four) first reinforcing ribs 14 are arranged between the two longitudinal plates, and the plurality of first reinforcing ribs 14 are arranged side by side in the front and back direction. The first reinforcing ribs 14 are arranged in the left-right direction, and the upper side thereof is fixed to the lower side of the strip plate, which is specifically a rectangular plate. A plurality of (specifically two) second reinforcing ribs 15 are arranged on the side of the transverse plate away from the rotating shaft, and the plurality of second reinforcing ribs 15 are arranged side by side in the left-right direction, and the second reinforcing ribs 15 are arranged in the front-back direction and the upper side thereof is fixed to the lower side of the circular plate. Among them, the vibration reduction unit includes a support block 41 and a soft vibration reduction plate 42 on its upper side. The support block 41 and the soft vibration reduction plate 42 are both arranged in the front-back direction, and are located between the two longitudinal plates, and the left and right sides thereof are located on the adjacent inner sides of the longitudinal plates on the corresponding sides. The support block 41 is fixed to the upper side of the rotating shaft, and the soft vibration reduction plate 42 is sandwiched between the support block 41 and the support plate 11. Specifically, the soft vibration reduction plate 42 is a strip rubber plate, and its thickness is 8-15 mm. The support block 41 is a rectangular block, and an arc-shaped notch matching the rotating shaft is provided in the middle of the lower side along the left-right direction, and the support block 41 is welded and fixed on the rotating shaft.

[0047] Specifically, taking the single-axle bogie 8 in the front as an example, the limiting protrusion 17 is located in the middle of the front side of the circular plate. The two dampers are located at the left and right ends of the rear side of the circular plate, and the distance between them gradually decreases from front to back. The front end of the damper is hinged on the circular plate, and the rear end is hinged on the hinge seat 71.

[0048] Among them, the braking device 3 in the embodiment of the utility model includes two braking units, and the two braking units are respectively arranged at one end of the two longitudinal beams 13 away from the middle of the flatbed car 7, and the braking unit and the rotation limit device 10 are located on the same side. Specifically, for the single-axle bogie 8 in the front, the two braking units are respectively arranged at the front of the two longitudinal beams 13 and they are respectively located in front of the two rail wheels. Among them, the braking unit is arranged in the front-to-back direction and it includes a first connecting plate 31, a second connecting plate 32, a brake cylinder 33, a brake shoe 34 and a brake base 35. The brake base 35 is arranged vertically, which is located on the outside of the longitudinal beam 13, and its upper part is hinged (through the left-right rotating shaft) on the first connecting plate 31 on the longitudinal beam 13. The brake cylinder 33 is arranged in the front-to-back direction, and is located on the side of the brake base 35 away from the rail wheel. It is located on the outside of the longitudinal beam 13. The front end or rear end of the cylinder body is hinged (through the left-right rotation axis) on the second connecting plate 32 at the end of the longitudinal beam 13. Its telescopic rod is hinged to the middle part of the brake base 35 (through the left-right rotation axis, and the telescopic rod is located between the two side plates). It can be specifically composed of two side plates arranged side by side. The brake shoe 35 is located on the side of the brake base 35 close to the rail wheel, and is located in the adjacent front or rear of the rail wheel. It is hinged (through the left-right rotation axis, and the hinge seat of the brake shoe 35 is located between the two side plates) at the lower part of the brake base 35. The first connecting plate 31 and the second connecting plate 32 are both arranged in the left-right direction. Specifically, the first connecting plate 31 is located at the front end or rear end of the two longitudinal plates, and the second connecting plate 32 is fixed on the strip plate.

[0049] Specifically, the flatbed trucks with single-axle bogies in this embodiment are all arranged symmetrically with respect to the mid-perpendicular line of the wheelset 2 (arranged along the front-rear direction).

[0050] Example 2

[0051] See also Figure 5 Embodiment 2 provides a flatbed vehicle with a single-axle bogie, whose wheelset adopts bilateral braking, and its structure is basically the same as that of embodiment 1, except that: the braking device 3 in this embodiment includes four braking units. A braking unit is respectively provided at the front and rear of the two longitudinal beams 13, and the two braking units on the same longitudinal beam 13 are arranged oppositely and are respectively located at the front and rear sides of the rail wheel on the corresponding side. Accordingly, the two longitudinal beams 13 and the one cross beam 12 are arranged in an I-shaped arrangement.

[0052] Example 3

[0053] Embodiment 3 provides a flatbed car with a single-axle bogie, and its structure is the same as that of Embodiment 1, except that: the flatbed car 7 in this embodiment is 8.5m long, 1.6m wide, and 0.57m high from the ground at its top, and can run on a track with a turning radius of 20m. The distance between the two wheel pairs 2 is 5.5m, and the diameter of the track wheel is 0.35m. The depth of the annular groove 63 is 30mm, and its width is 50mm. The outer diameter of the inner rotating guide ring 62 is 510mm, and its inner diameter is 450mm. The outer diameter of the outer rotating guide ring 61 is 670mm and the gap between it and the inner rotating guide ring 62 is 8mm, and the floating gap 65 is 6mm. The soft vibration damping plate 42 is a strip rubber plate with a thickness of 100mm. The diameter of the lower center plate 51 is 310mm, and the diameter of the upper center plate 52 is 280mm.

[0054] Among them, "first", "second", "third" and "fourth" in this patent only serve to distinguish and have no other special meanings.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flatbed vehicle with a single-axle bogie, comprising a flatbed vehicle (7) arranged in the front-to-back direction and two single-axle bogies (8) arranged side by side in the front-to-back direction at the bottom thereof, wherein the single-axle bogie (8) comprises a frame (1) arranged in the front-to-back direction, a wheelset (2) arranged in the left-right direction under the frame (1), a braking device (3) on the frame (1) and cooperating with the wheelset (2), and a vibration reduction device (4) between the wheelset (2) and the frame (1); characterized in that: The flatbed vehicle with a single-axle bogie also includes a damping device (9) on the front side or rear side of the single-axle bogie (8) and a rotation limiting device (10) on the other side of the single-axle bogie (8), the damping device (9) and the rotation limiting device (10) are both arranged at the bottom of the flatbed vehicle (7), the damping device (9) includes two dampers arranged in a V-shape or an eight-shaped shape; the two dampers are arranged symmetrically on the left and right sides of the perpendicular midline of the wheelset (2), the ends close to each other are fixed on the bottom of the flatbed vehicle (7), and the ends away from each other are respectively fixed on the left and right ends of the front side or rear side of the frame (1); a limiting protrusion (17) is provided at the middle of the rear side or the middle of the front side of the frame (1) and at the rotation limiting device (10), the rotation limiting device (10) includes two stoppers arranged side by side on the left and right sides at the bottom of the flatbed vehicle (7); the limiting protrusion (17) is located in the middle position between the two stoppers; The single-axle bogie (8) further comprises a center plate assembly (5) and an annular side bearing device (6) on the upper side of the frame (1); the frame (1) is rotatably arranged at the bottom of the flatbed vehicle (7) through the center plate assembly (5); the center plate assembly (5) is located directly above the middle of the wheelset (2); The annular side bearing device (6) is arranged around the core disk assembly (5) and comprises an outer rotating guide ring (61) and an inner rotating guide ring (62) both of which are circular ring structures; the outer rotating guide ring (61) is fixed on the frame (1), and an annular groove (63) is coaxially arranged on the inner wall of the outer rotating guide ring; the inner rotating guide ring (62) is coaxially arranged with the outer rotating guide ring (61), is located on the adjacent inner side of the outer rotating guide ring (61), is coaxially arranged outside the core disk assembly (5), and its upper side is relatively The upper side of the outer rotating guide ring (61) is higher and flush with the upper side of the core disk assembly (5). It is located above the frame (1) and has a coaxially disposed convex ring (64) on its outer wall that cooperates with the annular groove (63). The convex ring (64) is located in the annular groove (63) and has floating gaps (65) between its three sides and the corresponding sides of the annular groove (63). The upper side of the core disk assembly (5) and the upper side of the inner rotating guide ring (62) are both fixed to the bottom of the flatbed car (7).

2. The flatbed vehicle with a single-axle bogie according to claim 1, characterized in that: The two dampers are arranged in a V shape, and the dampers include spring dampers or hydraulic dampers. An articulated seat (71) is provided at the bottom of the flatbed car (7) and located directly in front of or directly behind the frame (1), and the articulated seat (71) is an L-shaped plate arranged along the left and right directions; the upper end of the vertical plate of the L-shaped plate is fixed to the bottom of the flatbed car (7), and the horizontal plate thereof is located at the lower end of the vertical plate and is located on the side of the vertical plate close to the single-axle bogie (8); both dampers are hinged to the lower side of the horizontal plate through a vertically arranged rotating shaft, and a third reinforcing rib (72) is provided between the side of the vertical plate away from the single-axle bogie (8) and the bottom of the flatbed car (7) along the front-back direction.

3. The flatbed vehicle with a single-axle bogie according to claim 1, characterized in that: The rotation limiting device (10) comprises a bottom plate, a side plate, two blocks and two fourth reinforcing ribs (73); the side plate is arranged in the left-right direction, and its left and right ends are respectively fixed to the side of the two blocks away from the single-axle bogie (8); the bottom plate is located below the limiting protrusion (17), and is arranged in the left-right direction, and its left and right ends are respectively fixed to the lower side of the two blocks; the two fourth reinforcing ribs (73) are respectively arranged on the two blocks, and the fourth reinforcing ribs are arranged between the side of the block away from the limiting protrusion (17) and the bottom of the flatbed car (7) and are arranged in the left-right direction.

4. The flatbed vehicle with a single-axle bogie according to claim 1, characterized in that: The damping device (9) is located on a side of the single-axle bogie (8) close to the middle of the flatbed vehicle (7), and the rotation limiting device (10) is located on a side of the single-axle bogie (8) away from the middle of the flatbed vehicle (7).

5. The flatbed vehicle with a single-axle bogie according to claim 1, characterized in that: The center plate assembly (5) comprises a lower center plate (51), an upper center plate (52) and a center pin (53); the lower center plate (51) is fixed on the upper side of the frame (1) and its axis is located on the mid-vertical line of the wheelset (2); the upper center plate (52) is located on the upper side of the lower center plate (51) and is coaxially arranged with the lower center plate (51); the center pin (53) penetrates downward through the axis of the upper center plate (52) and the lower center plate (51) and its lower part is fixedly connected to the frame (1); the inner rotating guide ring (62) is coaxially arranged outside the upper center plate (52) and its upper side is flush with the upper side of the upper center plate (52); the upper side of the upper center plate (52) and the upper part of the center pin (53) are fixed on a flatbed vehicle (7).

6. The flatbed vehicle with a single-axle bogie according to claim 5, characterized in that: The bottom of the flatbed car (7) is provided with two fixing plates (74) for fixing the single-axle bogie (8); the fixing plate (74) is a circular plate coaxially arranged with the annular side bearing device (6), and its diameter is larger than the outer diameter of the outer rotating guide ring (61), and a circular hole for a center pin (53) to pass through is provided at the center of the circle; the upper sides of the upper center plate (52) and the inner rotating guide ring (62) are welded and fixed to the lower side of the fixing plate (74), and the center pin (53) is a vertically downward bolt and its head is against the upper side of the fixing plate (74).

7. The flatbed vehicle with a single-axle bogie according to claim 5, characterized in that: The frame (1) comprises a support plate (11) and a crossbeam (12) and two longitudinal beams (13) on the lower side thereof; the center plate assembly (5) and the annular side bearing device (6) are both arranged on the upper side of the support plate (11); the two longitudinal beams (13) are arranged side by side on the left and right sides, and are arranged in the front-to-back direction. They are arranged symmetrically on the left and right sides about the mid-vertical line of the wheelset (2), and are respectively located at the left and right ends of the support plate (11), and are located between the two rail wheels of the wheelset (2). They are composed of two longitudinal plates arranged side by side on the left and right sides; the crossbeam (12) is located between the two longitudinal beams (13), and is arranged in the left-to-right direction. Two fixing pins (16) for fixing the rotating shaft of the wheelset (2) are arranged side by side on the left and right sides of the lower part thereof. The fixing pins (16) are arranged side by side on the front and back sides and are respectively located on the front and back sides of the rotating shaft. The invention relates to a rotational support device (14) and a rotational support device (15). The rotational support device (14) is composed of two transverse plates; the longitudinal plate is arranged in the front-to-back direction, the transverse plate is arranged in the left-to-right direction, and the lower part of the longitudinal plate is provided with an inverted U-shaped notch in the vertical direction for the rotation shaft to pass through; the fixing pin (16) is arranged in the front-to-back direction, and it abuts against the lower side of the rotation shaft, and its front and rear ends are respectively fixed to the two transverse plates, and it is arranged close to the longitudinal beam (13) on the corresponding side; the damping device (9) and the rotation limiting device (10) are both located between the two longitudinal beams (13), and the rotation shaft is located between the two transverse plates; the vibration reduction device (4) comprises two vibration reduction units arranged side by side on the left and right, the two vibration reduction units are respectively located in the two longitudinal beams (13), and the vibration reduction unit is located between the two longitudinal plates and between the rotation shaft and the support plate (11).

8. The flatbed vehicle with a single-axle bogie according to claim 7, characterized in that: The support plate (11) includes a circular plate in the middle and two strip plates on the left and right sides of the circular plate. The outer side of the circular plate is flush with the outer side of the strip plate on the corresponding side. The two strip plates are respectively located directly above the two longitudinal beams (13) and are both arranged in the front-to-back direction. The circular plate is coaxially arranged with the annular side bearing device (6) and its size matches the outer rotating guide ring (61). The core plate assembly (5) and the annular side bearing device (6) are both arranged on the upper side of the circular plate. The transverse plate is fixed on the lower side of the circular plate and its two ends are fixedly connected to the longitudinal plates on the corresponding side. The longitudinal plate is fixed on the lower side of the strip plate. The limiting protrusion (17) is arranged in the front-to-back direction and is arranged in the middle of the front side or the middle of the rear side of the circular plate. The damper is hinged to the intersection of the circular plate and the strip plate through a vertically arranged rotating shaft.

9. The flatbed vehicle with a single-axle bogie according to claim 7, characterized in that: The braking device (3) includes two or four braking units, and the braking units are arranged in the front-to-back direction; if there are two braking units, the two braking units are respectively arranged at one end of the two longitudinal beams (13) away from the middle of the flatbed vehicle (7), and the braking unit and the rotation limiting device (10) are located on the same side; if there are four braking units, a braking unit is respectively provided at the front and rear of the two longitudinal beams (13), and the two braking units on the same longitudinal beam (13) are arranged opposite to each other and are respectively located at the front and rear sides of the rail wheel on the corresponding side.

10. The flatbed vehicle with a single-axle bogie according to claim 1, characterized in that: The length of the flatbed car (7) is 7.5-9.5m, and its width is 1.5-1.7m; the distance between the two wheel pairs (2) is 5-6m; the depth of the annular groove (63) is 25-35mm, and its width is 40-60mm; the outer diameter of the inner rotating guide ring (62) is 400-500mm; the outer diameter of the outer rotating guide ring (61) is 650-700mm and the gap between it and the inner rotating guide ring (62) is 5-10mm, and the floating gap (65) is 5-8mm.

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