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

Abstract

The invention discloses a high-comfort high-stability rotatable non-power bogie for a tramcar, and belongs to the technical field of tramcar bogies. The system comprises a framework assembly, wheel set axle box devices arranged at the two ends of the framework assembly and connected with the framework assembly through primary suspension devices, and a secondary suspension and swing bolster device 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; the foundation brake device is connected to the wheel set axle box device and the framework; 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 invention has the advantages of favorable curve passing capacity, high comfort and high stability.

Description

Technical Field

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

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

[0003] At present, some urban public transportation systems use trams as transportation tools, which not only meet the city's carrying capacity needs, but also reflect the city's characteristics and enhance tourism appeal. However, since the trains run on the roads in the urban area, they are affected by factors such as buildings and infrastructure, and the requirements for the curve passability of trams are getting higher and higher. In addition, the traditional non-powered bogies with bolsters generally use a straight bolster structure, which not only increases the center of gravity of the bogie, but also directly leads to an increase in the floor surface inside the car, resulting in poor comfort and stability of the vehicle.

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

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a non-powered bogie for a high-comfort and high-stability slewing tram, 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 object, the present invention provides the following technical solutions:

[0007] The present invention discloses a non-power bogie for a high-comfort and high-stability slewing tram, 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 through the bolster assembly; and

[0010] A traction device connecting the bolster component and the frame component; 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] Further, the frame body of the frame composition 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 spiral steel spring, a vertical shock absorber, a lateral shock absorber, a lateral stopper and the bolster;

[0017] The bolster assembly comprises the bolster, both ends of which are provided with spiral steel springs, which are connected to the side beams of the frame body through the spiral steel springs, the top of which is provided with a rubber spring, and a vertical stopper is provided inside the spiral steel spring;

[0018] The vertical shock absorber is arranged 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 cross beam 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] Further, 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 arranged in the middle of the bolster, the center pin is installed in the middle of the bolster groove section, and side bearings are arranged 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. Two hydraulic brake calipers are installed on each of the basic braking devices.

[0025] Furthermore, the brake caliper mounting seat is provided with a safety hoisting protection device at the end of the cross beam, and the safety hoisting protection device is connected to the base on the cross beam 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 non-power bogie for a high-comfort and high-stability slewing tram. The frame component can realize relative slewing between the frame component and the vehicle body through the combination of the first lower groove structure 100 and the second lower groove structure 200, and the minimum passable curve radius is 25m. At the same time, by optimizing the bogie structure, reducing the weight of the bogie, reducing the unsprung mass and the center of gravity of the bogie, the vehicle stability and comfort indexes 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 adopts a "bow"-shaped frame + concave rocker combined structure, which provides the feasibility for lowering the floor surface inside the vehicle, while reducing the center of gravity height of the bogie and improving the stability and comfort of vehicle operation.

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

[0032] 3) The frame of the non-powered bogie is welded with 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 drawings required for use in the embodiments will be briefly introduced below. 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 1It is an axonometric diagram of a non-power bogie for a high-comfort and high-stability slewing tram disclosed by the present invention;

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

[0036] Figure 3 It is a top view of a non-power bogie for a high-comfort and high-stability slewing tram disclosed by the present invention;

[0037] Figure 4 The invention 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. Wheel set axle box device; 3. Primary suspension device; 4. Secondary suspension and bolster device; 5. Traction device; 6. Basic brake device;

[0040] 11. cross beam; 12. side beam; 13. end beam;

[0041] 41. Helical steel spring; 42. Vertical shock absorber; 43. Transverse shock absorber; 44. Transverse stopper; 45. Rocker; 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. A 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] A non-power bogie for a high-comfort and high-stability slewing tram is invented, comprising:

[0049] 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 33, and a secondary suspension and bolster device 4 arranged in the middle of the 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 component and the frame component 1; and

[0052] A basic brake device 6 connected to the wheelset axle box device 2 and the frame component 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 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 the center pin component 46.

[0054] In the structure, the frame component 1 includes a frame body, the two ends of the cross beam 11 of the frame body are fixedly connected with the side beams 12, the frame body is respectively provided with end beams 13 at the two ends of the side beams 12, and the two side beams 12 are connected by the front and rear end beams 13 and the cross beam 11, so that the cross section of the frame body in the horizontal plane projection is a "sun" shaped structure, and the side beam 12 is constructed as a special-shaped structure, wherein the side beam 12 is projected on the plumb plane, and a first lower groove structure 100 is formed in the middle, so that the side beam 12 is a horizontally placed "bow" shaped structure, the cross beam 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 second suspension and bolster device 4 has a second lower groove structure 200 formed in the middle of the bolster beam 45, and a center pin assembly 46 is arranged on the second lower groove structure 200, which is connected to the vehicle body through the center pin assembly 46. Thus, the frame assembly 1 is combined with the first lower groove structure 100 and the second lower groove structure 200, which 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, improves the stability and comfort of vehicle operation, and 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 arranged at both ends of the bolster 45 and are made of a high polymer wear-resistant material with a low friction coefficient to directly bear the weight of the vehicle body and also bear the rotation resistance of the vehicle body when the vehicle passes through a curve;

[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 end 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 herringbone rubber springs to reduce 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 car body, and two end beams 13 extending along the width direction of the car 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 beam 12, and end beam 13 of the frame body are welded by 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. Mounting interfaces for the primary suspension device 3 are formed at both ends of the side beam 12 of the frame body, and mounting 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 a mounting 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 almost 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 of the bolster is provided with coil steel springs 41 at both ends, and is connected between the bolster 45 and the side beam 12 through the coil steel springs 41. A rubber spring is provided on the upper part 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 through 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, so that the frame can elastically support the bolster 45 through the coil steel spring 41. A vertical stopper is provided inside the coil steel spring 41, which is used to rigidly stop the bolster 45 from moving downward to the limit position;

[0067] 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 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 on the cross beam 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 limited bolster 45 .

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

[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 a second lower groove structure 200 is arranged 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 arranged at both ends of the bolster 45 .

[0073] Specifically, in this structure, the bolster 45 is a box-type structure welded by a combination of steel plates and castings and forgings, which reduces the weight while ensuring that the strength of the bolster 45 meets the requirements. At the same time, in order to set the installation interface of the steel spring, the traction device 5, the shock absorber and other components, a second concave structure is formed in the middle of the bolster 45, which can effectively reduce the height of the floor surface in the vehicle; the center pin assembly 46 is connected to the vehicle body through 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 passing performance; the side bearings 47 are arranged at both ends of the bolster 45, and are made of a high molecular wear-resistant material with a low friction coefficient, directly bearing the weight of the vehicle body, and at the same time used to bear the rotation resistance of the vehicle body when the vehicle passes the curve;

[0074] In this structure, side bearings 47 made of polymer wear-resistant material are arranged at both ends of the bolster 45 to bear the weight of the vehicle body and provide the rotation friction between the vehicle body and the bogie. A center pin structure 46 connected to the vehicle body is arranged in the middle of the bolster 45, so that the bogie and the vehicle body have a large-angle rotation function, which is conducive to passing through small-radius curve sections;

[0075] See also Figure 1 As shown:

[0076] Preferably, the traction device 5 is a double traction rod structure, and the traction device 5 includes two traction rods 51, which are symmetrically arranged on both sides of the frame body, and 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, which is 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 mode. 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. Two hydraulic brake calipers 62 are installed on each basic brake device 6;

[0079] Specifically, each non-powered bogie is provided with four sets of compact hydraulic brake calipers 62, which are installed on the frame body through brake caliper mounting seats 61. The brake caliper mounting seats 61 are arranged on both sides of the bolster. One end of the brake caliper mounting seat 61 is installed 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] The basic brake device 6 in this structure adopts axle disc brake, and provides greater braking requirements for the bogie through the configuration of four sets of hydraulic brake calipers 62. The brake caliper mounting seat 61 is installed on the main cross beam 11 and the end beam 13 of the frame by a "three-point elastic suspension" method, which ensures the reliability of the brake caliper installation and reduces the unsprung mass, thereby improving the stability of the bogie.

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

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

[0083] The frame component 1 can realize relative rotation between the frame component 1 and the vehicle body by combining the first lower groove structure 100 and the second lower groove structure 200, and the minimum passable curve radius is 25m. At the same time, by optimizing the bogie structure, reducing the weight of the bogie, reducing the unsprung mass and the center of gravity of the bogie, the vehicle stability and comfort indexes are both less than 2.5.

[0084] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions 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 component and the frame component (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 skeletal 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 via a center pin component (46).

2. A non-powered bogie for a high-comfort and high-stability slewing tram according to claim 1, characterized in that ； The frame body of the frame composition (1) comprises 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; 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 spiral 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 spiral steel springs (41), which are connected to the side beams (12) of the frame body through the spiral steel springs (41), the top of the spiral steel spring (41) is provided with a rubber spring, and a vertical stopper is provided inside the spiral 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 part 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 a side bearing (47); A bolster groove section for forming the second lower groove structure (200) is arranged in the middle of the bolster (45), the center pin assembly (46) is installed in the middle of the bolster groove section, and side bearings (47) are arranged 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 1 is characterized in that ； There are two basic brake devices (6), which adopt a shaft disc braking method. The basic brake device (6) includes a brake clamp mounting seat (61), one end of the brake clamp mounting seat (61) is installed 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 installed with two hydraulic brake clamps (62).

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 provided with a safety hoisting protection device (63) at the end of the cross beam (11), and the safety hoisting protection device (63) is connected to a base on the cross beam (11) via 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, characterized in that ； The primary suspension device (3) adopts a herringbone rubber spring.

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