Rack rail car, drive unit and swing frame assembly

Abstract

The present invention relates to a rack rail car, a drive unit and a swing frame assembly, and belongs to the technical field of rack rail cars. The swing frame assembly runs on the rack rail, and includes: a fixed seat, a swing frame pivotally connected to the fixed seat through a hinge shaft; two rollers that are in rolling contact with the top surface of the corresponding side special-shaped rail are spaced apart on one side of the swing frame, and two brake assemblies are spaced apart on the other side; each brake assembly includes a first and a second brake block and a double-acting oil cylinder, and the double-acting oil cylinder drives the two brake blocks away from or close to each other to achieve separation or contact with the outer peripheral surface of the corresponding roller and the lower surface of the top plate of the special-shaped rail, thereby completing braking and releasing the brake. The drive unit includes a mounting frame and the above-mentioned swing frame assembly arranged on both sides of the bottom thereof; the rack rail car includes a drive assembly, and the drive unit is mounted on the drive frame of the drive assembly. This solution effectively improves the running stability and safety of the rack rail car by adaptively swinging the swing frame to adapt to the undulations of the track, combined with the dual braking structure of the double brake blocks.

Description

Technical Field

[0001] The present invention belongs to the technical field of rack rail vehicles, and in particular relates to a rack rail vehicle, a drive unit and a swing frame assembly. Background Art

[0002] Rack rail cars, specialized equipment for long-distance transportation in coal mines, utilize explosion-proof batteries or diesel engines as their power source. They utilize a drive unit meshing with rack rails to achieve heavy-load transport. The car body is equipped with a rail guide device that constrains the car body along the track, providing high derailment safety in complex tunnel environments. They are widely used in underground transport of large equipment such as hydraulic supports.

[0003] Existing braking systems for rack and rail vehicles primarily include two types: one is a rotating shaft brake mechanism built into the drive unit (such as a hydraulic motor or electric motor), which limits torque on the drive shaft via a brake disc; the other is a disc friction brake applied to the pinned wheel disc, which generates braking force by clamping the wheel disc with a caliper brake. Both of these braking methods act on the rotating components of the drive unit itself.

[0004] In actual operation, especially when running on steeply inclined track sections, the existing braking system still has the risk of slipping out of control. It is urgent to develop a safety braking device that is integrated with the drive unit and has an active track clamping function. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a swing frame assembly with a high-efficiency braking device to solve the problem of insufficient braking force of the rack rail vehicle in the prior art.

[0006] To achieve the above objectives, the present invention adopts a technical solution: a swing frame assembly for a rack rail vehicle, which runs on a rack rail, wherein the rack rail includes special-shaped rails arranged on its left and right sides, and the swing frame assembly includes:

[0007] A fixing seat, one end of which is fixedly connected to the body of the rack rail vehicle;

[0008] a swing frame, which is pivotally connected to the other end of the fixing base via a hinge shaft;

[0009] A first roller and a second roller are arranged at intervals on one side of the swing frame along the length direction of the swing frame and are in rolling contact with the top surface of the special-shaped rail arranged on the corresponding side;

[0010] A first brake assembly and a second brake assembly are arranged at intervals on the other side of the swing frame along the length direction of the swing frame, and each brake assembly includes:

[0011] a first brake pad and a second brake pad; and

[0012] A double-acting oil cylinder, whose two ends are respectively connected to the first brake block and the second brake block, and the double-acting oil cylinder is configured as follows: when the first brake block and the second brake block are driven away from each other, the first brake block is separated from the outer peripheral surface of the corresponding roller, and the second brake block is separated from the lower surface of the top plate of the corresponding special-shaped rail; when they are driven closer to each other, the first brake block abuts against the outer peripheral surface of the corresponding roller, and the second brake block abuts against the lower surface of the top plate of the corresponding special-shaped rail.

[0013] In a possible embodiment, the double-acting cylinder includes:

[0014] Cylinder body;

[0015] A first piston rod and a second piston rod are movably disposed in the cylinder body, wherein the inner ends of the first piston and the second piston are connected respectively, and the outer ends of the first piston and the second piston are connected respectively.

[0016] The first piston and the second piston define an oil inlet chamber within the cylinder; and

[0017] The first elastic member and the second elastic member are respectively sleeved on the first piston rod and the second piston rod, and are configured to drive the two piston rods to move toward each other when the oil inlet chamber is depressurized.

[0018] In a possible embodiment, the first elastic member and the second elastic member are both configured as compression springs.

[0019] In a possible embodiment, the first elastic member and the second elastic member are both configured as disc spring assemblies.

[0020] In a possible embodiment, the first brake pad includes a first base and a first brake pad, the first base includes a fixing portion and an arcuate portion connected to the fixing portion, the arcuate portion is arranged directly above the corresponding roller; the arcuate portion has an arcuate contact surface adapted to the outer peripheral surface of the corresponding roller, the shape of the first brake pad is adapted to the arcuate contact surface, and is fixed to the bottom of the arcuate portion by a fastener; the fixing portion is fixedly connected to the end of the first piston rod.

[0021] In a possible embodiment, the second brake pad includes a second base fixed to the end of the second piston rod, and the end of the second base facing the special-shaped rail is located below the top plate of the special-shaped rail. A second brake pad is fixed on the second base, and the second brake pad is used to abut against the lower surface of the top plate of the corresponding special-shaped rail.

[0022] In a possible embodiment, a guide wheel is rotatably connected below the second base body, and an outer circumferential surface of the guide wheel is in rolling contact with the web of the corresponding special-shaped rail.

[0023] In a possible embodiment, a rail-clamping wheel is connected to the middle position of the bottom of the swing frame, and the rail-clamping wheel is located below the top plate of the corresponding special-shaped rail and is used for rolling contact with the lower surface of the top plate of the special-shaped rail.

[0024] The present invention also provides a driving unit, comprising a mounting frame and at least two of the above-mentioned swing frame assemblies, wherein the swing frame assemblies are symmetrically arranged on both sides of the bottom of the mounting frame.

[0025] The present invention also provides a rack rail vehicle, comprising a cab and a drive assembly, wherein the cab and the drive assembly are connected to each other via a connecting rod, and the drive assembly comprises a drive frame, on which at least one circular cavity is provided, and the above-mentioned drive unit is installed in the circular cavity.

[0026] The beneficial effects of the present invention are as follows: by integrating the brake assembly into the swing frame assembly, the brake assembly can synchronously act on the roller and the track to achieve bidirectional constraint, wherein the first brake block directly abuts the lower surface of the top plate of the special-shaped rail, forming a track locking effect, eliminating the risk of relative slippage between the wheel and the rail; the second brake block clamps the outer peripheral surface of the roller, forcing the wheel to stop and blocking the transfer of kinetic energy. The first and second brake blocks synchronously abut the track and the roller, and adopt a fail-safe structure with fast response speed and good braking effect. The brake assembly adopts a longitudinal arrangement with a small installation space, adopts positive pressure braking, has a large braking force, and has a good braking effect. At the same time, it has a compact structure, and when the rack rail car passes through the switch, it will not interfere with the switch.

[0027] By installing the swing frame assembly on both sides of the bottom of the drive unit swing frame, the drive unit has three levels of braking at the same time. The first level is the self-braking of the drive unit drive component, the second level is the disc brake that brakes the wheel disc of the drive unit, and the third level is the braking device set on the swing frame assembly that brakes the track and roller at the same time. These three levels of braking can ensure the safe operation of the rack rail vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the three-dimensional structure of a swing frame assembly provided in one embodiment of the present invention.

[0029] Figure 2 This is a front view of a swing frame assembly provided in one embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the swing frame assembly provided by one embodiment of the present invention from another angle.

[0031] Figure 4 A schematic diagram of the three-dimensional structure of a brake assembly provided in one embodiment of the present invention.

[0032] Figure 5 A cross-sectional view of a double-acting cylinder provided in accordance with an embodiment of the present invention.

[0033] Figure 6 A three-dimensional structural diagram of a driving unit provided in one embodiment of the present invention.

[0034] Figure 7 This is a schematic diagram of two drive units provided by one embodiment of the present invention installed on a drive frame.

[0035] The text labels in the figure are as follows: 100, swing frame assembly; 110, fixed seat; 120, first brake assembly; 121, first brake pad; 121a, arc surface; 121b, fixed portion; 121c, first brake pad; 122, second brake pad; 122a, second brake pad; 122b, second base; 123, double-acting cylinder; 123a, first elastic member; 123b, second elastic member; 123c, first piston rod; 123d, second piston rod; 123e, oil inlet chamber; 123f , first piston; 123g, second piston; 123h, cylinder body; 124, guide wheel; 130, second brake assembly; 140, roller assembly; 141, first roller; 142, second roller; 150, swing frame; 151, mounting plate; 160, track wheel; 170, articulated shaft; 200, rack track; 210, rack; 220, profile rail; 300, drive unit; 310, disc brake; 320, drive actuator; 330, pin gear; 340, slider; 400, drive frame. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0037] like Figure 1 As shown, this embodiment provides a swing frame assembly 100, which can be set on both sides of the bottom of the driving unit of the rack rail vehicle. The swing frame assembly 100 runs on the rack rail and can swing to enable the rack rail vehicle to adapt to changes in the track.

[0038] refer to Figure 1-Figure 3 In some embodiments, the swing frame assembly 100 includes a fixed base 110 and a swing frame 150. The upper end of the fixed base 110 is fixed to a corresponding component of the rack rail vehicle via fasteners such as screws, and the lower end is provided with a hinged lug. A corresponding mating lug is provided in the middle of the swing frame 150. The hinged lug of the fixed base 110 is pivotally connected to the mating lug via a hinge shaft 170. The swing frame 150 can swing about the axis of the hinge shaft 170 to adapt to the fluctuations of the track.

[0039] refer to Figure 3 and Figure 6A roller assembly 140 is mounted on the swing frame 150. The roller assembly includes a first roller 141 and a second roller 142. Two roller mounting frames are spaced apart on one side of the swing frame 150 in the longitudinal direction. The first roller 141 and the second roller 142 are mounted in the two roller mounting frames, respectively. The rolling surfaces of the rollers are configured to roll against the top surface of the profiled rail 220 on the corresponding side of the rack track 200. The profiled rail 220 is a specialized track with a top plate extending outward.

[0040] refer to Figure 1 and Figure 2 In some possible embodiments, a first brake assembly 120 and a second brake assembly 130 are further provided on the swing frame 150. The two brake assemblies and the two rollers are correspondingly provided on the other side of the swing frame 150 in the longitudinal direction. A mounting frame for the brake assemblies is provided on the swing frame 150, and the first brake assembly 120 and the second brake assembly 130 are fixedly mounted within the corresponding mounting frame.

[0041] refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 6 In this embodiment, the first brake assembly 120 and the second brake assembly 130 have the same structure. For example, the first brake assembly 120 includes a first brake pad 121, a second brake pad 122, and a double-acting hydraulic cylinder 123. The first brake pad 121 and the second brake pad 122 are connected to the ends of the double-acting hydraulic cylinder 123, respectively. The double-acting hydraulic cylinder 123 is used to drive the first brake pad 121 and the second brake pad 122 away from each other when the rack rail vehicle is in operation, separating the first brake pad 121 from the outer circumference of the first roller 141 and the second brake pad 122 from the lower surface of the top plate of the profiled rail 220. When the rack rail vehicle is in a failed state (i.e., requiring emergency braking or a brake system failure), the double-acting hydraulic cylinder 123 drives the first brake pad 121 and the second brake pad 122 toward each other, causing the first brake pad 121 to abut the outer circumference of the first roller 141 and the second brake pad 122 to abut the lower surface of the top plate of the profiled rail 220, thereby braking the rollers and the rail. When the locomotive loses control, the double-acting cylinder 123 controls the two brake blocks to brake the rails and wheels simultaneously, thereby quickly braking the locomotive and ensuring safe operation. When the locomotive is operating normally, the double-acting cylinder 123 releases the brakes, allowing the locomotive to pass normally.

[0042] refer to Figure 4 and Figure 5The double-acting cylinder includes a cylinder body 123h, within which a first piston rod 123c and a second piston rod 123d are disposed relative to each other. The two piston rods are movably disposed within the cylinder body 123h. A first piston 123f is disposed at the inner end of the first piston rod 123c, and a second piston 123g is disposed at the inner end of the second piston rod 123d. The area within the cylinder body 123h between the two pistons defines an oil inlet chamber 123e, which receives and returns oil through an oil inlet. A first elastic member 123a is sleeved on the first piston rod 123c within the cylinder body 123h, while a second elastic member 123b is sleeved on the second piston rod 123d within the cylinder body 123h. When the oil inlet chamber 123e is depressurized, the first and second elastic members 123a, 123b automatically retract the first and second piston rods 123c, 123d, causing the first brake block 121 to abut against the outer surface of the first roller 141, while the second brake block 122 abuts against the underside of the top plate of the profiled rail, thereby achieving braking. This double-acting cylinder has a fail-safe structure, meaning that even if the drive mechanism fails, braking can still be achieved. Pressure can also be released from the double-acting cylinder using the emergency brake button.

[0043] In some possible embodiments, the first elastic member 123a and the second elastic member 123b are both configured as compression springs, which can be optionally disc spring assemblies or coil compression springs. This embodiment adopts a disc spring assembly. When oil enters the oil inlet chamber 123e, the disc spring assembly is compressed, and the two piston rods extend to release the brake. When the oil inlet chamber 123e is depressurized and the oil returns (emergency braking or failure state), the disc spring assembly pushes the two pistons closer to each other under the action of elastic force, thereby pushing the two brake blocks closer to each other to achieve braking.

[0044] refer to Figure 4 and Figure 5 Taking the first brake assembly 120 as an example, the first brake pad 121 includes a first base and a first brake shoe 121c. The first base includes a fixed portion 121b and a curved surface portion 121a connected to the fixed portion 121b. The curved surface portion 121a is positioned directly above the first roller 141. The curved surface portion 121a has an arcuate contact surface that matches the outer circumference of the first roller 141. The first brake shoe 121c is shaped to match the arcuate contact surface and is secured below the curved surface portion 121a via fasteners such as screws. The fixed portion 121b is fixedly connected to the end of the first piston rod 123c.

[0045] Continue to refer Figure 4 and Figure 5In some embodiments, the second brake block 122 includes a second base 122b and a second brake block 122a. The second base 122b is fixedly connected to the end of the second piston rod 123d. The end of the second base 122b facing the special-shaped rail is located below the top plate of the corresponding side special-shaped rail. The second brake block 122a is fixed on the second base 122b and is located directly below the top plate of the corresponding special-shaped rail. The second brake block 122a is used to abut against the lower surface of the top plate of the special-shaped rail.

[0046] Continue to refer Figure 4 In some embodiments, a guide wheel 124 is rotatably connected to the lower portion of the second base 122 b , and an outer peripheral surface of the guide wheel 124 is in rolling contact with the web of the profiled rail.

[0047] refer to Figure 3 In some embodiments, a track-clamping wheel 160 is connected to the bottom of the swing frame 150. Specifically, a mounting plate 151 is provided at the bottom of the swing frame 150. The track-clamping wheel 160 is rotatably connected to the mounting plate 151 through a rotating shaft. The outer peripheral surface of the track-clamping wheel 160 can contact the lower surface of the top plate of the special-shaped rail. The track-clamping wheel 160 is used to lock the rack rail vehicle to prevent the locomotive from overturning.

[0048] By utilizing the structure of the swing frame assembly 100 itself to form a dual longitudinal positive pressure braking form of the roller and the first brake block, the track and the second brake block, the space can be effectively utilized, the lateral size can be reduced, and the overall spatial layout of the swing frame assembly 100 can be made more compact, so that the rack rail vehicle can pass through the switch smoothly.

[0049] refer to Figure 6 In some embodiments, a drive unit 300 is also provided. The drive unit 300 includes a mounting frame, on which a pin gear 330, a drive actuator 320, and a disc brake 310 are installed. The drive actuator 320 can be a hydraulic motor or an electric motor. A planetary reducer is arranged in the middle of the pin gear 330. The drive actuator 320 drives the planetary reducer and then drives the pin gear 330 to rotate. The pin gear 330 then cooperates with the rack 210 on the rack track 200 to achieve operation on the rack track 200.

[0050] In some possible implementations, a swing frame assembly 100 of the above embodiment is respectively provided on two opposite sides of the bottom of the mounting frame. The swing frame assembly 100 can enable the drive unit to adapt to the ups and downs of the track while having good safety. In addition, the locomotive will not interfere with the switch when passing through the switch.

[0051] In other embodiments, a rack rail car is provided, which includes a drive assembly and a cab. The structure of the drive assembly is as follows: Figure 7As shown, the drive assembly includes a drive frame 400, which is provided with two circular cavities. The aforementioned drive unit 300 is mounted within these cavities. The drive unit 300 rotates within these cavities via a slider 340 that cooperates with a chute within the circular cavities. A control box can be mounted on the drive frame 400. The drive assembly is connected to adjacent components via connecting rods and, when connected to a flatbed truck, enables cargo transportation. A rack rail vehicle equipped with this drive unit 300 can smoothly navigate switches. The drive unit 300 is equipped with a three-stage braking system. The first stage is a rotating shaft braking mechanism built into the drive actuator (e.g., a hydraulic motor or electric motor); the second stage is a disc friction brake applied to the pinned wheel disc by a disc brake 310; and the third stage is rail and wheel braking, implemented by the swing frame assembly 100. This provides excellent safety, particularly when operating in inclined lanes, and reduces the risk of runaway vehicles.

[0052] During operation of the rack rail vehicle, the swing frame assembly 100 is secured to both sides of the drive unit via the fixed base 110. The swing frame 150 is connected to the first hinged portion of the fixed base 110 via an articulated shaft, allowing the swing frame 150 to freely swing about the axis of the articulated shaft. If the track becomes undulating or uneven, the swing frame 150 adaptively adjusts its angle to the track's contours, ensuring rolling contact between the roller assembly 140 and the top surface of the long top plate of the profiled rail 220. This ensures smooth vehicle load transfer and prevents the risk of derailment.

[0053] When braking is required, the brake assembly drives the first and second brake blocks toward each other, thereby braking the track and roller. When braking is required, hydraulic oil is injected into the oil inlet chamber of the double-acting cylinder, driving the first and second brake blocks away from each other, thereby releasing the brakes on the track and roller.

[0054] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0055] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A swing frame assembly for a rack rail vehicle, running on a rack rail, wherein the rack rail includes profiled rails arranged on its left and right sides, characterized in that: The swing frame assembly includes: A fixing seat, one end of which is fixedly connected to the body of the rack rail vehicle; a swing frame, which is pivotally connected to the other end of the fixing base via a hinge shaft; A first roller and a second roller are arranged at intervals on one side of the swing frame along the length direction of the swing frame and are in rolling contact with the top surface of the special-shaped rail arranged on the corresponding side; A first brake assembly and a second brake assembly are arranged at intervals on the other side of the swing frame along the length direction of the swing frame, and each brake assembly includes: a first brake pad and a second brake pad; and A double-acting oil cylinder, whose two ends are respectively connected to the first brake block and the second brake block, and the double-acting oil cylinder is configured as follows: when the first brake block and the second brake block are driven away from each other, the first brake block is separated from the outer peripheral surface of the corresponding roller, and the second brake block is separated from the lower surface of the top plate of the corresponding special-shaped rail; when they are driven closer to each other, the first brake block abuts against the outer peripheral surface of the corresponding roller, and the second brake block abuts against the lower surface of the top plate of the corresponding special-shaped rail.

2. The swing frame assembly according to claim 1, characterized in that: The double-acting cylinder comprises: Cylinder body; A first piston rod and a second piston rod are movably disposed in the cylinder body, wherein the inner ends of the first piston and the second piston are connected respectively, and the outer ends of the first piston and the second piston are connected respectively. The first piston and the second piston define an oil inlet chamber within the cylinder; and The first elastic member and the second elastic member are respectively sleeved on the first piston rod and the second piston rod, and are configured to drive the two piston rods to move toward each other when the oil inlet chamber is depressurized.

3. The swing frame assembly according to claim 2, characterized in that: The first elastic member and the second elastic member are both configured as compression springs.

4. The swing frame assembly according to claim 3, characterized in that: The first elastic member and the second elastic member are both configured as disc spring assemblies.

5. The swing frame assembly according to claim 2, characterized in that: The first brake pad includes a first base and a first brake block, the first base includes a fixing portion and an arcuate portion connected to the fixing portion, the arcuate portion is arranged directly above the corresponding roller; the arcuate portion has an arcuate contact surface adapted to the outer peripheral surface of the corresponding roller, the shape of the first brake pad is adapted to the arcuate contact surface, and is fixed to the bottom of the arcuate portion by a fastener; the fixing portion is fixedly connected to the end of the first piston rod.

6. The swing frame assembly according to claim 2, characterized in that: The second brake block includes a second base fixed to the end of the second piston rod, and one end of the second base facing the special-shaped rail is located below the top plate of the special-shaped rail. A second brake block is fixed on the second base, and the second brake block is used to abut against the lower surface of the top plate of the corresponding special-shaped rail.

7. The swing frame assembly according to claim 6, characterized in that: A guide wheel is rotatably connected below the second base body, and an outer peripheral surface of the guide wheel is in rolling contact with the web of the corresponding special-shaped rail.

8. The swing frame assembly according to claim 1, characterized in that: A rail-clamping wheel is connected to the middle position of the bottom of the swing frame. The rail-clamping wheel is located below the top plate of the corresponding special-shaped rail and is used for rolling contact with the lower surface of the top plate of the special-shaped rail.

9. A drive unit, characterized in that: The invention comprises a mounting frame and at least two swing frame assemblies according to any one of claims 1 to 8, wherein the swing frame assemblies are symmetrically arranged on both sides of the bottom of the mounting frame.

10. A rack rail vehicle, characterized in that: It includes a cab and a drive assembly, which are connected to each other through a connecting rod. The drive assembly includes a drive frame, and at least one circular cavity is provided on the drive frame. The drive unit according to claim 9 is installed in the circular cavity.

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