High-comfort high-stability rotatable non-power bogie for tramcar

Abstract

The utility model discloses a high-comfort high-stability rotatable non-power bogie for a tramcar, and belongs to the technical field of tramcar bogies. The wheel set axle box devices are arranged at the two ends of the framework assembly and connected with the framework assembly through primary suspension devices, and the secondary suspension and swing bolster device is arranged in the middle of the framework assembly. The secondary suspension and swing bolster device is connected with the vehicle body through a swing bolster assembly; the traction device is connected with the swing bolster assembly and the framework assembly, and the foundation brake device is connected with the wheel set axle box device and the framework assembly. The projection section of the framework assembly on the horizontal plane is of a structure shaped like a Chinese character'ri ', the framework assembly is projected on the plumb bob plane, a first lower groove structure used for bearing the swing bolster assembly is formed in the middle of a framework body of the framework assembly, a second lower groove structure is formed in the middle of a swing bolster of the swing bolster assembly, and the second lower groove structure is connected with a vehicle body through the center pin assembly. The utility model has the advantages of favorable curve passing capacity, high comfort and high stability.

Description

Technical Field

[0001] The utility model relates to the technical field of tram bogies, in particular to a non-power bogie for a slewing tram with high comfort and high stability. Background Art

[0002] Trams are a type of rail transit with low to medium capacity. They are widely used due to their short construction period, low construction cost, and ability to operate on urban roads.

[0003] Currently, some urban public transportation systems use trams as a means of transportation, meeting urban capacity needs while also showcasing the city's unique character and enhancing its tourist appeal. However, because trams operate on urban roads, they are affected by factors such as buildings and infrastructure, leading to increasingly stringent requirements for trams' ability to navigate curves. Furthermore, traditional non-powered bogies with bolsters typically utilize a straight bolster structure, which not only increases the bogie's center of gravity but also directly raises the interior floor, resulting in poor vehicle comfort and stability.

[0004] Therefore, in view of the above problems, it is necessary for the present invention to provide a non-power bogie for a slewing tram with high comfort and high stability to meet market demand. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects of the existing technology and provide a non-powered bogie for a slewing tram with high comfort and high stability, so that it has good curve negotiating ability and can meet the safe operation of small-radius curve lines on urban roads. At the same time, by optimizing the frame structure, the comfort and stability of the vehicle are improved.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] The utility model discloses a non-power bogie for a slewing tram with high comfort and high stability, comprising:

[0008] A frame component, a wheelset axle box device arranged at both ends of the frame component and connected to the frame component through a primary suspension device, and a secondary suspension and bolster device arranged in the middle of the frame component;

[0009] The secondary suspension and bolster device is connected to the vehicle body via the bolster assembly; and

[0010] A traction device connecting the bolster assembly and the frame assembly; and

[0011] A basic brake device connected to the wheelset axle box device and the frame;

[0012] The cross-section of the frame component projected on the horizontal plane is a skeletal structure, and the frame component is projected on the plumb plane, and a first lower groove structure is formed in the middle of the frame body for supporting the rocker component, and a second lower groove structure is formed in the middle of the rocker component, and the second lower groove structure is connected to the vehicle body through a center pin component.

[0013] Furthermore, the frame body of the frame structure includes a crossbeam, two side beams extending along the length direction of the vehicle body, and two end beams extending along the width direction of the vehicle body;

[0014] A groove section is formed in the middle of the side beam, and both ends of the cross beam are respectively welded to the groove section to form the first lower groove structure;

[0015] Both ends of the end beam are connected to the side beam through rubber nodes.

[0016] Furthermore, the secondary suspension and bolster device comprises a coil steel spring, a vertical shock absorber, a lateral shock absorber, a lateral stopper and the bolster;

[0017] The bolster assembly comprises the bolster, with coil steel springs arranged at both ends of the bolster, connected to the side beams of the frame body via the coil steel springs, a rubber spring arranged at the top end of the coil steel spring, and a vertical stopper arranged inside the coil steel spring;

[0018] The vertical vibration damper is provided at the end of the bolster and connected between the bolster and the side beam;

[0019] The lateral vibration dampers are installed on both sides of the bolster and connected between the bolster and the crossbeam of the frame body through the lateral vibration dampers;

[0020] A transverse stop is provided at the lower portion of the bolster, and the transverse stop contacts the side wall of the limiting groove provided on the crossbeam to limit the transverse displacement of the bolster.

[0021] Furthermore, the bolster assembly includes the bolster, the center pin assembly, and a side bearing;

[0022] A bolster groove section for forming the second lower groove structure is provided in the middle of the bolster, the center pin is installed in the middle of the bolster groove section, and side bearings are provided at both ends of the bolster.

[0023] Furthermore, the traction device is a double traction rod structure.

[0024] Furthermore, there are two basic braking devices, which adopt a shaft disc braking method. The basic braking device includes a brake caliper mounting seat, one end of the brake caliper mounting seat is installed on the end beam through an elastic ring node, and the other end is hoisted on the frame crossbeam through two elastic rubber nodes. Each basic braking device is equipped with two hydraulic brake calipers.

[0025] Furthermore, the brake caliper mounting seat is provided with a safety lifting protection device at the end of the crossbeam, and the safety lifting protection device is connected to the base on the crossbeam through a shaft.

[0026] Furthermore, the wheelset axle box device is an external wheelset axle box structure.

[0027] Furthermore, the primary suspension device adopts a herringbone rubber spring.

[0028] In the above technical solution, the present invention provides a high-comfort, high-stability, slewing non-powered bogie for trams. The frame structure, through the combination of the first lower groove structure 100 and the second lower groove structure 200, enables relative rotation between the frame structure and the vehicle body, with a minimum traversable curve radius of 25 meters. Simultaneously, by optimizing the bogie structure, reducing the bogie weight, lowering the unsprung mass and the bogie center of gravity, the vehicle stability and comfort indicators are both less than 2.5.

[0029] Compared with the prior art, the non-powered bogie has the following beneficial effects:

[0030] 1) The non-powered bogie's "bow"-shaped frame and concave bolster structure provide a feasible way to lower the interior floor, while also reducing the bogie's center of gravity and improving vehicle stability and comfort.

[0031] 2) The brake caliper mounting seat of the non-powered bogie adopts a three-point elastic suspension installation method, making the installation of the brake caliper safer and more reliable, while reducing the unsprung mass and improving the vehicle's operating stability.

[0032] 3) The frame of the non-powered bogie is made of welded steel plates instead of castings, which can simplify the casting structure, improve the utilization rate of the steel plates, and reduce the weight of the bogie. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0034] Figure 1This is an axonometric diagram of a non-power bogie for a high-comfort and high-stability slewing tram disclosed in the utility model;

[0035] Figure 2 This is a front view of a non-power bogie for a high-comfort and high-stability slewing tram disclosed in the utility model;

[0036] Figure 3 This is a top view of a non-power bogie for a high-comfort and high-stability slewing tram disclosed in the utility model;

[0037] Figure 4 The utility model discloses a schematic structural diagram of a non-powered bogie bolster assembly for a high-comfort and high-stability slewing tram.

[0038] Description of reference numerals:

[0039] 1. Frame composition; 2. Wheelset axlebox assembly; 3. Primary suspension system; 4. Secondary suspension and bolster system; 5. Traction system; 6. Foundation brake system;

[0040] 11. Cross beam; 12. Side beam; 13. End beam;

[0041] 41. Coil steel spring; 42. Vertical shock absorber; 43. Transverse shock absorber; 44. Transverse stop; 45. Bolster; 46. Center pin assembly; 47. Side bearing;

[0042] 51. Traction rod;

[0043] 61. Brake caliper mounting seat; 62. Hydraulic brake caliper; 63. Safety lifting protection device; 64. Elastic ring node; 65. Elastic rubber node;

[0044] 100. First lower groove structure;

[0045] 200. Second lower groove structure. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] See also Figure 1 、 2 As shown;

[0048] The utility model discloses a non-power bogie for a high-comfort and high-stability slewing tram, comprising:

[0049] Frame component 1, wheelset axle box devices 2 arranged at both ends of frame component 1 and connected to frame component 1 through primary suspension device 33, and secondary suspension and bolster device 4 arranged in the middle of frame component 1;

[0050] The secondary suspension and bolster device 4 is connected to the vehicle body through the bolster assembly; and

[0051] A traction device 5 connecting the bolster assembly and the frame assembly 1; and

[0052] A foundation brake device 6 connected to the wheelset axle box device 2 and the frame assembly 1;

[0053] The cross-section of the frame component 1 projected on the horizontal plane is a skeletal structure, and the frame component 1 is projected on the plumb plane. A first lower groove structure 100 for supporting the rocker component is formed in the middle of the frame body, and a second lower groove structure 200 is formed in the middle of the rocker 45 of the rocker component. The second lower groove structure 200 is connected to the vehicle body through the center pin component 46.

[0054] In this structure, the frame component 1 includes a frame body, and the two ends of the crossbeam 11 of the frame body are fixedly connected with the side beams 12. The frame body is respectively provided with end beams 13 at both ends of the side beams 12, and the two side beams 12 are connected by the front and rear end beams 13 and the crossbeam 11, so that the cross section of the frame body in the horizontal plane projection is a "sun" shaped structure, and the side beams 12 are constructed as special-shaped structures, wherein the side beams 12 are projected on the plumb plane, and a first lower groove structure 100 is formed in the middle thereof, so that the side beams 12 are horizontally placed in a "bow" shaped structure, the crossbeam 11 is fixedly connected to the two side beams 12 at the position of the first lower groove structure 100, and the frame body supports the two side beams 12 through the first lower groove structure 100. The secondary suspension and bolster device 4 has a second lower groove structure 200 formed in the middle of the bolster 45 of the secondary suspension and bolster device 4. A center pin assembly 46 is provided on the second lower groove structure 200 and connected to the vehicle body through the center pin assembly 46. Thus, the frame assembly 1, through the combination of the first lower groove structure 100 and the second lower groove structure 200, not only provides feasibility for lowering the floor surface inside the vehicle, but also reduces the height of the center of gravity of the bogie, thereby improving the stability and comfort of vehicle operation. In addition, the center pin assembly 46 in the second lower groove structure 200 can provide a rotation center for the rotation between the vehicle body and the bogie, thereby ensuring that the vehicle has good small radius curve passing performance.

[0055] Secondly, the side bearings 47 are located at both ends of the bolster 45 and are made of a low-friction polymer wear-resistant material. They directly bear the weight of the vehicle body and are also used to withstand the rotational resistance of the vehicle body when it goes through curves.

[0056] Preferably, the wheelset axle box device 2 adopts an external wheelset axle box structure, and system devices such as speed sensors and grounding devices can be configured at the shaft ends as needed. Two axle-mounted brake discs are set for each wheelset, and the wheels adopt a traditional steel wheel structure;

[0057] In this structure, the bogie adopts a wheel set and axle box device 2 with an external wheel set and axle box structure. The wheelbase can reach 1800 mm - 2000 mm, and this wheelbase range can ensure that the vehicle has good passing ability on small-radius curves.

[0058] Preferably, the primary suspension device 3 adopts a chevron rubber spring, which reduces the installation space while ensuring performance.

[0059] See Figure 3 as shown in:

[0060] Preferably, the frame body of the frame assembly 1 includes a cross beam 11, two side beams 12 extending along the length direction of the vehicle body, and two end beams 13 extending along the width direction of the vehicle body.

[0061] A groove section is formed in the middle of the side beam 12. Both ends of the cross beam 11 are welded to the groove section to form a first lower groove structure 100. Both ends of the end beam 13 are connected to the side beam 12 through rubber joints.

[0062] Specifically, the frame assembly 1 adopts a frame body with a "day" - shaped structure. The cross beam 11, side beams 12, and end beams 13 of the frame body are welded with steel plates and forgings. A first concave structure is formed in the middle of the frame body, which can effectively reduce the overall height of the bogie. Installation interfaces for the primary suspension device 3 are formed at both ends of the side beam 12 of the frame body, and installation interfaces for the secondary suspension device are formed in the middle concave section of the side beam 12. The front and rear end beams 13 are connected to the side beam 12 through elastic rubber joints and jointly act with the cross beam 11 to provide an installation interface for the foundation braking device 6.

[0063] In this structure, the cross-sectional projection of the frame body in the vertical plane is a horizontally placed "bow" - shaped structure. The height of the cross beam 11 is nearly the same as that of the axle, which helps to reduce the floor height and at the same time helps to lower the center of gravity of the bogie, improving the running stability of the vehicle. The cross beam 11 adopts a hollow box structure, which can provide a feasible space for reducing the height of the bolster.

[0064] See Figure 2 、 3 as shown in:

[0065] Preferably, the secondary suspension and bolster device 4 includes a helical steel spring 41, a vertical shock absorber 42, a lateral shock absorber 43, a lateral stop 44, and a bolster assembly.

[0066] The bolster 45 is provided with coil steel springs 41 at both ends thereof, and is connected between the bolster 45 and the side beam 12 via the coil steel springs 41. A rubber spring is provided on the upper portion of the coil steel spring 41, and a vertical stopper is provided inside the coil steel spring 41. Specifically, in the assembled state, the frame body is provided with the coil steel spring 41 via the side beam 12, and a rubber spring is provided on the top of the coil steel spring 41. The bolster 45 falls on the rubber spring, thereby achieving the purpose of elastically supporting the bolster 45 via the coil steel spring 41. A vertical stopper is provided inside the coil steel spring 41 to rigidly stop the bolster 45 from moving downward to the limit position.

[0067] The vertical vibration damper 42 is installed at the end of the bolster 45 and connected between the bolster 45 and the side beam 12. The lateral vibration dampers 43 are installed on both sides of the bolster 45 and connected between the bolster 45 and the cross beam 11 of the frame body through the lateral vibration dampers 43.

[0068] A transverse stopper 44 is provided at the lower part of the bolster 45 , and the transverse stopper 44 cooperates with the limiting groove provided in the crossbeam 11 of the frame body. When limiting, the transverse stopper 44 contacts the side wall of the limiting groove, thereby realizing the lateral displacement of the limiting bolster 45 .

[0069] The secondary suspension and bolster device 4 in this structure adopts a coil steel spring 41 + a rubber spring + a vertical shock absorber 42 + a lateral shock absorber 43 + a lateral stop 44. Through reasonable suspension parameter design, it provides good comfort and stability for the bogie.

[0070] See also Figure 4 As shown:

[0071] Preferably, the bolster assembly includes a bolster 45, a center pin assembly 46, and a side bearing 47;

[0072] A bolster groove section for forming the second lower groove structure 200 is provided in the middle of the bolster 45 , a center pin assembly 46 is installed in the middle of the bolster groove section, and side bearings 47 are provided at both ends of the bolster 45 .

[0073] Specifically, in this structure, the bolster 45 is a box-type structure welded from a combination of steel plates and castings and forgings, which reduces weight while ensuring that the strength of the bolster 45 meets the requirements. At the same time, a second concave structure is formed in the middle of the bolster 45 to provide installation interfaces for components such as steel springs, traction devices 5, and shock absorbers, effectively lowering the height of the vehicle interior floor. The center pin assembly 46 is connected to the vehicle body by bolts at the top and embedded in the center pin seat hole of the bolster 45 at the bottom, providing a rotation center for the rotation between the vehicle body and the bogie, ensuring that the vehicle has good small-radius curve negotiation performance. Side bearings 47 are provided at both ends of the bolster 45 and are made of a low-friction polymer wear-resistant material. They directly bear the weight of the vehicle body and are also used to withstand the rotation resistance of the vehicle body when negotiating curves.

[0074] In this structure, side bearings 47 made of a wear-resistant polymer material are installed at both ends of the bolster 45 to bear the weight of the car body and provide rotational friction between the car body and the bogie. A center pin structure 46 connected to the car body is installed in the middle of the bolster 45, allowing the bogie and car body to rotate at a large angle, which is convenient for navigating small-radius curves.

[0075] See also Figure 1 As shown:

[0076] Preferably, the traction device 5 is a double-tie rod structure, comprising two traction rods 51 symmetrically arranged on both sides of the frame body. One end of the traction rod 51 is connected to the side beam 12 of the frame body, and the other end is connected to the bolster 45. The traction device 5 adopts a double-tie rod traction structure, symmetrically arranged on both sides of the frame body, to provide uniform traction and braking force for the bogie.

[0077] See also Figure 3 As shown:

[0078] Preferably, there are two basic brake devices 6, which adopt a shaft disc brake method. The basic brake device 6 includes a brake caliper mounting seat 61. One end of the brake caliper mounting seat 61 is mounted on the end beam 13 through an elastic ring node 64, and the other end is hoisted on the frame crossbeam 11 through two elastic rubber nodes 65. Each basic brake device 6 is equipped with two hydraulic brake calipers 62.

[0079] Specifically, each non-powered bogie is equipped with four sets of compact hydraulic brake calipers 62, which are mounted on the frame body through brake caliper mounting bases 61. The brake caliper mounting bases 61 are arranged on both sides of the bolster. One end of the brake caliper mounting base 61 is mounted on the frame body end beam 13 through an elastic ring node 64, and the other end is hoisted on the frame cross beam 11 through two elastic rubber nodes 65 to ensure reliable transmission of braking force.

[0080] In this structure, the basic brake system 6 employs axle-disc braking, and through the configuration of four sets of hydraulic brake calipers 62, it provides greater braking requirements for the bogie. The brake caliper mounting base 61 is mounted on the main frame crossbeam 11 and end beam 13 using a "three-point elastic suspension" method, ensuring reliable brake caliper installation while reducing unsprung mass, thereby improving bogie stability.

[0081] In order to ensure the safety of the brake caliper mounting seat 61, the brake caliper mounting seat 61 is provided with a safety lifting protection device 63 at the end of the crossbeam 11. The safety lifting protection device 63 is connected to the base on the crossbeam 11 through an axis, thereby effectively preventing the brake caliper mounting seat 61 from falling and causing operational hazards.

[0082] In the above technical solution, the utility model provides a non-powered bogie for a high-comfort and high-stability slewing tram, which has the following beneficial effects:

[0083] The combination of the first lower groove structure 100 and the second lower groove structure 200 enables relative rotation between the frame assembly 1 and the vehicle body, with a minimum traversable curve radius of 25 meters. Furthermore, by optimizing the bogie structure, reducing bogie weight, unsprung mass, and lowering the bogie's center of gravity, the vehicle's stability and comfort indicators are both less than 2.5.

[0084] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A non-power bogie for a high-comfort and high-stability slewing tram, comprising: A frame component (1), a wheelset axle box device (2) arranged at both ends of the frame component (1) and connected to the frame component (1) through a primary suspension device (3), and a secondary suspension and bolster device (4) arranged in the middle of the frame component (1); The secondary suspension and bolster device (4) is connected to the vehicle body via the bolster assembly; as well as A traction device (5) connecting the bolster assembly and the frame assembly (1); and A basic brake device (6) connected to the wheelset axle box device (2) and the frame assembly (1), characterized in that: The cross section of the frame component (1) projected on a horizontal plane is a spherical structure, and the frame component (1) is projected on a plumb plane, and a first lower groove structure (100) is formed in the middle of the frame body for supporting the bolster component, and a second lower groove structure (200) is formed in the middle of the bolster (45) of the bolster component, and the second lower groove structure (200) is connected to the vehicle body through a center pin component (46).

2. The non-powered bogie for a high-comfort and high-stability slewing tram according to claim 1 is characterized in that ； The frame body of the frame assembly (1) comprises a crossbeam (11), two side beams (12) extending in the length direction of the vehicle body, and two end beams (13) extending in the width direction of the vehicle body; A groove section is formed in the middle of the side beam (12), and both ends of the cross beam (11) are respectively welded to the groove section to form the first lower groove structure (100); Both ends of the end beam (13) are connected to the side beam (12) via rubber nodes.

3. The non-powered bogie for a high-comfort and high-stability slewing tram according to claim 1, characterized in that: The secondary suspension and bolster device (4) comprises a coil steel spring (41), a vertical shock absorber (42), a lateral shock absorber (43), a lateral stopper (44) and the bolster; The bolster assembly comprises the bolster (45), both ends of which are provided with coil steel springs (41), which are connected to the side beams (12) of the frame body via the coil steel springs (41), the top end of the coil steel spring (41) is provided with a rubber spring, and a vertical stopper is provided inside the coil steel spring (41); The vertical vibration damper (42) is arranged at the end of the bolster (45) and connected between the bolster (45) and the side beam (12); The lateral vibration dampers (43) are installed on both sides of the bolster (45) and are connected between the bolster (45) and the crossbeam (11) of the frame body through the lateral vibration dampers (43); A transverse stopper (44) is provided at the lower portion of the bolster (45), and the transverse stopper (44) cooperates with a limiting groove provided on the crossbeam (11) to limit the transverse displacement of the bolster (45).

4. A non-powered bogie for a high-comfort and high-stability slewing tram according to claim 1 or 3, characterized in that ； The bolster assembly includes the bolster (45), the center pin assembly (46) and the side bearing (47); The middle of the bolster (45) is provided with a bolster groove section for forming the second lower groove structure (200), the middle of the bolster groove section is equipped with the center pin component (46), and side bearings (47) are provided at both ends of the bolster (45).

5. The non-powered bogie for a high-comfort and high-stability slewing tram according to claim 1 is characterized in that ； The traction device (5) is a double traction rod structure.

6. The non-powered bogie for a high-comfort and high-stability slewing tram according to claim 2 is characterized in that ； There are two basic brake devices (6) which adopt a shaft disc braking method. The basic brake devices (6) include a brake clamp mounting seat (61). One end of the brake clamp mounting seat (61) is mounted on the end beam (13) through an elastic ring node (64), and the other end is hoisted on the frame crossbeam (11) through two elastic rubber nodes (65). Two hydraulic brake clamps (62) are installed on each basic brake device (6).

7. The non-powered bogie for a high-comfort and high-stability slewing tram according to claim 6 is characterized in that ； The brake caliper mounting seat (61) is located at the end of the crossbeam (11) and is provided with a safety hoisting protection device (63). The safety hoisting protection device (63) is connected to the base on the crossbeam (11) through a shaft.

8. The non-powered bogie for a high-comfort and high-stability slewing tram according to claim 1 is characterized in that ； The wheelset axle box device (2) is a wheelset axle box external structure.

9. The non-powered bogie for a high-comfort and high-stability slewing tram according to claim 1 is characterized in that ； The primary suspension device (3) adopts a herringbone rubber spring.

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