Constant-force rotary damping device for small-curve bogie with rotary bearing structure

Abstract

The invention discloses a constant-force rotary damping device for a small-curve bogie of a rotary bearing structure, and belongs to the technical field of bogies of rail transit vehicles, the constant-force rotary damping device is arranged on the two sides of a rotary bearing and fixedly connected with a swing bolster, and the top end of the constant-force rotary damping device can abut against a vehicle body; the top end of a device body of the constant-force rotary damping device is connected with a friction block capable of protruding out of the upper surface of the device body in a sliding mode, and an elastic component which drives the friction block to stretch out and keeps constant pressure is arranged in the device body so that the top end of the friction block can abut against a vehicle body with constant pressure in real time. The problem that the critical speed of a vehicle is low due to the fact that the turning resistance of a small-curve bogie adopting a turning bearing structure is too small is effectively solved, the vehicle can smoothly pass through a small-radius curve, and the safety and reliability of the vehicle during high-speed running in a straight line section can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicle bogies, and in particular to a constant force slewing damping device for a small curve bogie with a slewing bearing structure. Background Art

[0002] Because the radius of a small curve is small, the relative rotation between the car body and bogie is large. Commonly used bolsterless bogies, such as air springs, anti-roll torsion bars, and vertical shock absorbers, lack the required displacement capacity. Using a slewing bearing + bolster structure to connect the car body and bogie effectively addresses the large displacement issues of air springs and other connectors, enabling free rotation between the car body and bogie and facilitating the vehicle's maneuverability through small curves. However, the use of a slewing bearing also presents another problem: the reduced rotational resistance between the car body and bogie reduces the vehicle's critical speed, making it more susceptible to instability during high-speed operation. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a constant force slewing damping device for a small curve bogie with a slewing bearing structure, which is used to solve the problem of low critical speed of the vehicle caused by too small slewing resistance of the small curve bogie with a slewing bearing structure.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention discloses a constant force slewing damping device for a small curve bogie with a slewing bearing structure, comprising: the constant force slewing damping device is arranged on both sides of the slewing bearing and fixedly connected to the bolster, and the top end of the constant force slewing damping device can abut against the vehicle body;

[0006] The top of the device body of the constant force rotary damping device is slidably connected to a friction block that can protrude from its upper surface. The inside of the device body has an elastic component that drives the friction block to extend and maintain constant pressure, so that the top of the friction block maintains constant pressure against the vehicle body in real time.

[0007] Furthermore, the elastic component includes a bracket, and springs are evenly distributed around the bracket to drive the friction block to extend and provide pressure.

[0008] Furthermore, the spring is a coil spring, and one end of the spring is fixedly connected to the bracket.

[0009] Furthermore, the spring is fixedly connected to the side wall of the top end of the bracket, and the cross section of the bracket is an equilateral triangle or a regular hexagon.

[0010] Furthermore, a support block is fixedly connected to the bottom end of the friction block, and the friction block contacts the elastic component through the support block.

[0011] Furthermore, the constant force rotary damping device is symmetrically fixed to the bolster with the rotary bearing as the center.

[0012] Furthermore, the device body includes a mounting seat, a sleeve is fixedly connected to the middle of the mounting seat, which is used to provide an installation space for the friction block and be slidably connected to it, and a mounting hole is opened on one side of the mounting seat.

[0013] Furthermore, U-shaped mounting grooves are provided at both ends of the bolster, and the opening direction of the U-shaped mounting grooves is away from the center line side of the vehicle body running direction.

[0014] Furthermore, a supporting plate is fixedly connected to the interior of the U-shaped mounting groove, and a matching hole is provided on the supporting plate.

[0015] Furthermore, a visually visible marking line is provided on the side of the friction block.

[0016] In the above technical solution, the present invention provides a constant force slewing damping device for a small curve bogie with a slewing bearing structure, which has the following beneficial effects:

[0017] The constant-force slewing damping device designed in the present invention is used on a small-curve bogie with a slewing bearing structure. Compared with small-curve bogies using a slewing bearing structure in the prior art, it has no additional slewing damping and relies solely on the friction of the bearing itself. The slewing damping is very small, and the vehicle's critical speed is low. The vehicle's maximum operating speed is 80 km / h. Furthermore, as the equivalent taper increases with wheel wear, the vehicle's critical speed further decreases, potentially leading to instability. The constant-force slewing damping device provided by the present invention can adjust the slewing damping between the vehicle body and the bogie by changing the pressure of the constant-force spring, thereby increasing the vehicle's critical speed and adapting to higher operating speeds and wheel wear requirements. This allows the vehicle to smoothly navigate small-radius curves while ensuring safety and reliability when traveling at high speeds in straight sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of a state in which a constant force slewing damping device for a small curve bogie with a slewing bearing structure disclosed in the present invention is assembled on a bolster;

[0020] Figure 2 This is a schematic diagram of the overall structure of a constant force slewing damping device for a small curve bogie with a slewing bearing structure disclosed by the present invention;

[0021] Figure 3 The present invention discloses a cross-sectional view of a constant force slewing damping device for a small curve bogie with a slewing bearing structure.

[0022] Description of reference numerals:

[0023] 1. Bolster; 1.1. Mounting slot;

[0024] 2. Slewing bearing;

[0025] 3. Device body; 3.1. Mounting seat; 3.2. Elastic component; 3.3. Support block; 3.4. Friction block; 3.5. Spring; 3.6. Mounting hole. DETAILED DESCRIPTION

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the assembly of the constant force rotary damping device of the present invention;

[0028] A constant-force slewing damping device for a small-curve bogie with a slewing bearing structure is invented. The upper portion of a bolster 1 is connected to the vehicle body via a slewing bearing 2. The slewing bearing 2 can transmit vertical, longitudinal, and lateral forces between the vehicle body and the bogie while enabling free rotation between the vehicle body and the bogie. The constant-force slewing damping devices are symmetrically distributed on both sides of the slewing bearing 2 and fixedly connected to both ends of the bolster 1.

[0029] Figure 2 It is a schematic diagram of the overall structure of the constant force rotary damping device;

[0030] Figure 3 It is a cross-sectional view of the constant force rotary damping device;

[0031] The constant-force rotary damping device comprises a device body 3, with a friction block 3.4 vertically slidably connected to the top of the device body 3, which protrudes from its upper surface. The device body 3 contains an elastic component 3.2 inside, which drives the friction block 3.4 to extend and maintains constant pressure, so that the top of the friction block 3.4 maintains a constant static contact pressure against the vehicle body in real time.

[0032] In the working state, the constant force spring 3.5 of the elastic component 3.2 can continue to output a constant pressure, so that the pressure and friction between the friction block 3.4 and the vehicle body remain unchanged.

[0033] In this structure, after the bolster 1 and slewing bearing 2 are connected to the car body, the friction block 3.4 of the constant-force slewing damping device is pressed against the friction plate at the car body end by the action of the spring of the elastic component 3.2. During vehicle operation, relative rotation between the car body and the bolster 1 will generate friction between the friction block 3.4 and the friction plate at the car body end, thereby suppressing the snaking motion of the bogie through the car body.

[0034] See also Figure 3 As shown:

[0035] Preferably, the elastic component 3.2 comprises a bracket, and springs 3.5 are evenly distributed around the bracket to drive the friction block 3.4 to extend and provide pressure;

[0036] Specifically, the spring 3.5 is a cylindrical coil spring, one end of which is fixedly connected to the bracket. The surface of the spring 3.5 is in contact with the support block 3.3, pressing the friction block 3.4. During the expansion of the spring 3.5, a constant static contact pressure is provided to the friction block 3.4.

[0037] A spring 3.5 is fixedly connected to the side wall of the top of the bracket, and the bottom end of the bracket is fixedly connected to the mounting base 3.1 of the device body 3. Preferably, the bracket has a cylindrical structure with a cross-section of an equilateral triangle or a regular hexagon. The springs 3.5 include three springs, and the sides of the triangle are fixedly connected to the spring 3.5. When the bracket is a regular hexagon, the three springs 3.5 are evenly distributed along the circumference of the bracket, and the angle formed between two adjacent springs 3.5 is 120 degrees, so that the springs 3.5 can be stably deployed along the side wall of the equilateral triangle or regular hexagon bracket.

[0038] Of course, according to actual design requirements, spring 3.5 can also include two or more than three;

[0039] When there are two springs 3.5, the bracket can be a plate-shaped body or a regular polygonal columnar body in cross section, and the springs 3.5 are symmetrically fixed on both sides of the top of the bracket;

[0040] When there are three or more springs 3.5, the cross section of the bracket can be polygonal, and the springs 3.5 are evenly distributed along the circumference of the bracket to ensure that the friction block 3.4 is evenly stressed.

[0041] See also Figure 3 As shown:

[0042] Preferably, the bottom end of the friction block 3.4 is fixedly connected to the support block 3.3, and contacts the elastic component 3.2 through the support block 3.3. When assembled, the support block 3.3 is sleeved on the outside of the bracket of the elastic component 3.3, and the spring 3.5 contacts the end surface of the support block 3.3;

[0043] Preferably, a visual marking line is provided on the side of the friction block 3.4, and the wear degree of the friction block 3.4 can be referenced by the marking line so as to replace the friction block 3.4 in time;

[0044] See also Figure 2 、 3 As shown:

[0045] Preferably, the device body 3 includes a mounting seat 3.1, a sleeve is fixedly connected to the middle of the mounting seat 3.1, and the sleeve provides installation space for the friction block 3.4 and is slidably connected to it. A mounting hole 3.6 is opened on one side of the mounting seat 3.1, and the mounting hole 3.6 is fixedly connected to the rocker 1 by bolts so that it can be detachably assembled and assembled.

[0046] See also Figure 1 As shown:

[0047] Among them, U-shaped mounting grooves 1.1 are opened at both ends of the rocker 1, and the opening direction of the U-shaped mounting groove 1.1 is away from the center line side of the vehicle body running direction. A support plate is fixedly connected inside the U-shaped mounting groove 1.1, and a matching hole is opened on the support plate. The support plate and the mounting seat 3.1 are bolted together to be fixed and detachable.

[0048] In this structure, during operation, if the friction block 3.4 is worn beyond the limit or the constant force rotary damping device fails, it can be quickly disassembled and replaced on the side of the rocker 1 without additional operation.

[0049] In the above technical solution, the present invention provides a constant-force slewing damping device for a small-curve bogie with a slewing bearing structure. The device is installed between the bogie bolster 1 and the car body. A constant-force spring 3.5 inside the device ensures that a constant pressure is always applied to the friction plate at the car body end by the friction block 3.4. When relative rotation occurs between the car body and the bogie, friction is generated between the constant-force slewing damping device and the friction plate. This friction can increase the slewing resistance between the car body and the bogie, thereby suppressing the snaking motion of the bogie and increasing the critical speed of the vehicle.

[0050] 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.

Claims

1. A constant force slewing damping device for a small curve bogie with a slewing bearing structure, characterized by: The constant-force rotary damping device is arranged on both sides of the rotary bearing (2) and is fixedly connected to the bolster (1), and the top end of the constant-force rotary damping device can abut against the vehicle body; The top end of the device body (3) of the constant force rotary damping device is slidably connected to a friction block (3.4) capable of protruding from its upper surface. The device body (3) has an elastic component (3.2) inside that drives the friction block (3.4) to extend and maintain constant pressure, so that the top end of the friction block (3.4) is in constant contact with the vehicle body at a constant pressure in real time.

2. A constant force slewing damping device for a small curve bogie with a slewing bearing structure according to claim 1, It is characterized by: The elastic component (3.2) comprises a bracket, on which springs (3.5) are evenly distributed around the circumference for driving the friction block (3.4) to extend and provide pressure.

3. The constant force slewing damping device for a small curve bogie with a slewing bearing structure according to claim 2 is characterized in that ； The spring (3.5) is a coil spring, and one end of the spring (3.5) is fixedly connected to the bracket.

4. The constant force slewing damping device for a small curve bogie with a slewing bearing structure according to claim 2 is characterized in that ； The spring (3.5) is fixedly connected to the side wall at the top end of the bracket, and the cross section of the bracket is an equilateral triangle or a regular hexagon.

5. The constant force slewing damping device for a small curve bogie with a slewing bearing structure according to claim 1, characterized in that: The bottom end of the friction block (3.4) is fixedly connected to a support block (3.3), and contacts the elastic component (3.2) through the support block (3.3).

6. The constant force slewing damping device for a small curve bogie with a slewing bearing structure according to claim 1, characterized in that: The constant force rotary damping device is symmetrically fixed to the bolster (1) with the rotary bearing (2) as the center.

7. A constant force slewing damping device for a small curve bogie with a slewing bearing structure according to any one of claim 1, characterized in that ； The device body (3) comprises a mounting seat (3.1), a sleeve being fixedly connected to the middle of the mounting seat (3.1) for providing a mounting space for the friction block (3.4) and being slidably connected thereto, and a mounting hole being provided on one side of the mounting seat (3.1).

8. A constant force slewing damping device for a small curve bogie with a slewing bearing structure according to any one of claims 1 to 7, It is characterized by: U-shaped mounting grooves (1.1) are provided at both ends of the bolster (1), and the opening direction of the U-shaped mounting groove (1.1) is away from the center line side of the vehicle body running direction.

9. The constant force slewing damping device for a small curve bogie with a slewing bearing structure according to claim 8 is characterized in that ； A supporting plate is fixedly connected inside the U-shaped mounting groove (1.1), and a matching hole is provided on the supporting plate.

10. A constant force slewing damping device for a small curve bogie with a slewing bearing structure according to any one of claims 1 to 7, characterized in that ； A visually visible marking line is provided on the side of the friction block (3.4).

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