Three-axle bogie for railway engineering tractor

Abstract

A three-axle bogie for a track engineering tractor is provided, wherein the frame is composed of two side beams, two middle beams and end beams, and multiple groups of spring slider type support devices for supporting the vehicle body are symmetrically arranged on the two side beams, and the spring slider type support device and the side block and traction rod device arranged at the bottom of the side beam form a suspension elastic support structure for the vehicle body; the axle gearboxes on the axles in the two adjacent wheel set assemblies are connected through a transmission shaft to realize the synchronous rotation of the three axle gearboxes driven by the power drive system. The present invention improves the support structure for supporting the vehicle body, and has the characteristics of high power, large adhesion weight, and large traction capacity while ensuring the low cost and safety performance of the engineering tractor. The spring slider type support device is simply and effectively combined with the side block and traction rod device, so that the tractor has good running stability and is easy to manufacture, and can be used for a liquid-transmitted rail vehicle tractor or a traction electric body suspended electric rail vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of bogies, and in particular relates to a three-axle bogie for a track engineering tractor. Background Art

[0002] At present, most of the rail tractors used in shunting and small-scale transportation in domestic industrial and mining enterprises, ports and marshalling yards are two-axle bogies. Due to the limitations of the load-bearing capacity of the rail line and the strength of the vehicle wheels, axles and bearings, there are problems such as low adhesion weight and low loading power of rail engineering tractors. At present, the domestic small-scale six-axle shunting locomotives are generally electric transmission bogies, with a set of traction motors + axle gearboxes configured on each wheel pair axle, which has the problem of high manufacturing cost; at the same time, the engineering tractor bogies used in standard gauge lines, ports, docks, marshalling yards, etc. to pull various passenger cars, trucks, and metallurgical vehicles have unreasonable body support structures, small rotation resistance, and cannot adapt to the lateral displacement of the wheelset caused by the wheel flange guidance when the vehicle passes through a curve, which poses a safety hazard. Therefore, it is necessary to make improvements to the above problems. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a three-axle bogie for a track engineering tractor. By improving the supporting structure for supporting the vehicle body, a plurality of spring slider type support devices are symmetrically arranged on a frame provided with three sets of wheel set assemblies. The bogie has the characteristics of high power, large adhesion weight, large traction capacity, etc., appropriate rotational torque, high safety performance, and a simple and effective combination of the spring slider type support device with a side stop and a traction rod device, so that the tractor has good running stability, low cost, easy manufacturing, etc.

[0004] The technical solution adopted by the present invention is as follows: a three-axle bogie for a rail engineering traction vehicle, comprising a frame, three groups of wheel pair assemblies adapted to be connected to the frame, and an axle box suspension device, wherein the frame is composed of two side beams, two middle beams arranged between the two side beams, and end beams arranged at both ends of the two side beams, and multiple groups of spring slider type support devices for supporting the vehicle body are symmetrically arranged on the two side beams, and the spring slider type support devices and the side guards and traction rod devices arranged at the bottom of the side beams form a suspension elastic support structure for the vehicle body; the axle gear boxes on the axles in two adjacent groups of the wheel pair assemblies are connected through a transmission shaft to realize the synchronous rotation of the three axle gear boxes driven by the power drive system.

[0005] Among them, the spring slider type support device includes a spring, a rubber pad and a spring upper cover. The upper end surfaces of the two side beams are each formed with a plurality of mounting grooves. A spring seat is provided in the mounting groove and the lower ends of the plurality of springs are seated on the side beams through a rubber pad provided in the spring seat. The upper end of the spring is adapted to be equipped with a spring upper cover. The friction block on the top surface of the spring upper cover contacts the lower seat plate provided at the bottom of the frame, and the movement range of the friction block is limited by a combination of a side block and a traction rod device hinged to the side block.

[0006] Furthermore, the spring seat is a waist-shaped ring structure with an open upper end and a sealed lower end. A rubber pad is provided on the inner bottom surface of the spring seat and a spring seat plate is provided on the upper end surface of the rubber pad. The positioning sleeve on the upper end surface of the spring seat plate is adaptably connected to the lower end of the spring, and the positioning column in the middle of the lower end surface of the spring seat plate passes through the rubber pad and is positioned on the bottom surface of the spring seat.

[0007] Furthermore, the friction block is adapted to fit in the positioning groove on the top surface of the spring upper cover, and the upper end surface of the friction block protrudes out of the positioning groove and contacts with the bottom surface of the lower seat plate.

[0008] Furthermore, the bearings used in the bearing boxes at both ends of the axles in the three groups of wheelset assemblies are the same, and the lateral clearance a of the bearings in the bearing boxes at both ends of the middle axle is greater than the lateral clearance b of the bearings in the bearing boxes at both ends of the axles.

[0009] Furthermore, the transverse gap a is the distance between the outer end surface of the bearing in the bearing box at both ends of the middle axle and the inner end surface of the shaft end retaining ring, and the transverse gap b is the distance between the outer end surface of the bearing in the bearing box at both ends of the axle and the inner end surface of the shaft end retaining ring.

[0010] Furthermore, the transverse gap a is 5 to 7 mm larger than the transverse gap b.

[0011] Furthermore, the power drive system adopts a hydraulic drive system or an electric drive system.

[0012] Furthermore, each set of the three wheelset assemblies is equipped with two unit brakes, and the unit brakes adopt tread braking.

[0013] Furthermore, the two unit brakes on each set of wheels in the wheelset assemblies at both ends are provided with parking brakes.

[0014] The advantages of the present invention compared with the prior art are:

[0015] 1. This technical solution improves the supporting structure for supporting the vehicle body and adopts multiple sets of spring slider type supporting devices symmetrically arranged on two side beams, which has the characteristics of appropriate rotation torque and high safety performance;

[0016] 2. This technical solution simply and effectively combines the spring slider support device with the side stop and the traction rod device, so that the tractor has good running stability;

[0017] 3. The spring slider support device of the technical solution adopts a structure in which the lower end of the spring is seated on the side beam through a rubber pad arranged in the spring seat, and the upper end of the spring is in contact with the lower seat plate arranged at the bottom of the frame through the spring upper cover and the friction block on the top surface of the spring upper cover, so that the relative movement of the friction block and the lower seat plate when the vehicle passes through the curve generates a rotation torque, thereby improving the safety and reliability of the vehicle operation;

[0018] 4. In the technical solution, the lateral clearance a of the bearings in the bearing boxes at both ends of the middle axle is larger than the lateral clearance b of the bearings in the bearing boxes at both ends of the axles, so as to adapt to the lateral displacement of the wheelset caused by the wheel rim guiding effect when the vehicle passes through the curve;

[0019] 5. This technical solution adopts a power wheel set composed of three sets of wheel set assemblies, which increases the vertical load-bearing capacity of the bogie. The three axle gearboxes operate synchronously, which increases the loading power of the rail engineering tractor. It has the characteristics of high power, large adhesion weight, and large traction capacity. The power drive system used to drive the three sets of wheel set assemblies to rotate synchronously adopts a hydraulic drive system or an electric drive system, which is low in cost and easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of the structure of the present invention;

[0021] Figure 2 It is a top view of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the spring slider support device of the present invention;

[0023] Figure 4 It is a cross-sectional view of the bearing boxes at both ends of the middle axle of the present invention;

[0024] Figure 5 It is a cross-sectional view of the bearing boxes at both ends of the axle of the present invention. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 An embodiment of the present invention is described to clearly and completely describe the technical solution. Obviously, the described embodiment is only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present invention.

[0027] Three-axle bogies for track engineering tractors, such as Figure 1-2 The figure shows a frame 1, three wheelset assemblies 2 adapted to be connected to the frame 1, and an axle box suspension device 4. The frame 1 is composed of two side beams 1-1, two middle beams 1-2 arranged between the two side beams 1-1, and end beams 1-3 arranged at both ends of the two side beams 1-1. Multiple groups of spring slider type support devices 5 for supporting the vehicle body are symmetrically arranged on the two side beams 1-1. The spring slider type support device 5 and the side block 6 and the traction rod device 7 arranged at the bottom of the side beam 1-1 form a suspension elastic support structure for the vehicle body. The axle gearboxes 8 on the axles in the wheel set assembly 2 are connected through the transmission shaft 3 to realize the synchronous rotation of the three axle gearboxes 8 driven by the power drive system; in the above structure, by improving the support structure for supporting the vehicle body, multiple groups of spring slider type support devices 5 are symmetrically arranged on the two side beams 1-1, with the characteristics of appropriate rotation torque and high safety performance, two-stage vertical vibration reduction and simple and effective combination of the spring slider type support device 5 with the side block 6 and the traction rod device 7, so that the tractor has good running stability;

[0028] like Figure 3As shown, the specific structure of the spring slider type support device 5 is as follows: the spring slider type support device 5 includes a spring 5-1, a rubber pad 5-2 and a spring upper cover 5-3, the upper end surfaces of the two side beams 1-1 are each formed with a plurality of mounting grooves 1-4, a spring seat 5-4 is arranged in the mounting groove 1-4, and the lower ends of the plurality of springs 5-1 are seated on the side beam 1-1 through the rubber pad 5-2 arranged in the spring seat 5-4, the upper end of the spring 5-1 is adapted with a spring upper cover 5-3, the friction block 5-9 on the top surface of the spring upper cover 5-3 contacts with the lower seat plate 5-5 arranged at the bottom of the frame, and the movement range of the friction block 5-9 is limited by the combination of the side block 6 and the traction rod device 7 hinged to the side block 6; specifically, the spring seat 5-4 is a waist-shaped ring structure with an open upper end and a sealed lower end, a rubber pad 5-2 is arranged on the inner bottom surface of the spring seat 5-4, and a spring seat plate 5-6 is arranged on the upper end surface of the rubber pad 5-2 , the positioning sleeve 5-7 on the upper end surface of the spring seat plate 5-6 is adapted to be connected with the lower end of the spring 5-1, and the positioning column 5-8 in the middle of the lower end surface of the spring seat plate 5-6 passes through the rubber pad 5-2 and is positioned on the bottom surface of the spring seat 5-4; specifically, the friction block 5-9 is adapted to be in the positioning groove 5-10 on the top surface of the spring upper cover 5-3, and the upper end surface of the friction block 5-9 protrudes out of the positioning groove 5-10 and contacts the bottom surface of the lower seat plate 5-5; in the above structure, the spring slider type support device 5 adopts a structure in which the lower end of the spring 5-1 is seated on the side beam 1-1 through the rubber pad 5-2 arranged in the spring seat 5-4, and the upper end of the spring 5-1 is in contact with the lower seat plate 5-5 arranged at the bottom of the frame through the spring upper cover 5-3 and the friction block 5-9 on the top surface of the spring upper cover 5-3, so that the relative movement of the friction block and the lower seat plate when the vehicle passes through the curve generates a rotational torque, thereby improving the safety and reliability of the vehicle operation;

[0029] In order to adapt to the lateral displacement of the wheelset caused by the wheel rim guidance when the vehicle passes through the curve, such as Figure 4-5 As shown, the following structure is adopted: the bearings 10 used in the bearing boxes 9 at both ends of the axles in the three groups of wheel set assemblies 2 are all the same, and the lateral gap a of the bearings 10 in the bearing boxes 9 at both ends of the middle axle is greater than the lateral gap b of the bearings 10 in the bearing boxes 9 at both ends of the axles; specifically, the lateral gap a is the distance between the outer end surface of the bearing 10 in the bearing boxes 9 at both ends of the middle axle and the inner end surface of the shaft end retaining ring 11, and the lateral gap b is the distance between the outer end surface of the bearing 10 in the bearing boxes 9 at both ends of the axles and the inner end surface of the shaft end retaining ring 11; specifically, the lateral gap a is 5 to 7 mm larger than the lateral gap b.

[0030] The power drive system adopts a hydraulic drive system or an electric drive system, and adopts a power wheel pair composed of three wheel pair assemblies 2, which increases the vertical load-bearing capacity of the bogie. The three axle gear boxes 8 operate synchronously, which increases the loading power of the rail engineering tractor, and has the characteristics of high power, large adhesion weight, and large traction capacity. The power drive system used to drive the three wheel pair assemblies 2 to rotate synchronously adopts a hydraulic drive system or an electric drive system, which has low cost and is easy to promote and apply. Specifically, each wheel pair in the three wheel pair assemblies 2 is equipped with two unit brakes 12 and the unit brakes 12 adopt tread brakes; specifically, the two unit brakes 12 on each wheel pair in the wheel pair assemblies 2 at both ends are equipped with parking brakes.

[0031] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A three-axle bogie for a railway engineering tractor, comprising a frame (1), three sets of wheel set assemblies (2) adapted to be connected to the frame (1), and an axle box suspension device (4), characterized in that: The frame (1) is composed of two side beams (1-1), two middle beams (1-2) arranged between the two side beams (1-1), and end beams (1-3) arranged at both ends of the two side beams (1-1); a plurality of groups of spring slider type support devices (5) for supporting the vehicle body are symmetrically arranged on the two side beams (1-1); the spring slider type support devices (5) and the side blocks (6) and the traction rod device (7) arranged at the bottom of the side beams (1-1) form a suspension elastic support structure for the vehicle body; the axle gear boxes (8) on the axles of two adjacent groups of the wheelset assemblies (2) are connected via a transmission shaft (3) to achieve synchronous rotation of the three axle gear boxes (8) driven by a power drive system; The spring slider support device (5) comprises a spring (5-1), a rubber pad (5-2) and a spring upper cover (5-3). The upper end surfaces of the two side beams (1-1) are each formed with a plurality of mounting grooves (1-4). A spring seat (5-4) is provided in the mounting groove (1-4). The lower ends of the plurality of springs (5-1) are seated on the side beam (1-1) via a rubber pad (5-2) provided in the spring seat (5-4). The upper end of the spring (5-1) is adapted to be provided with a spring upper cover (5-3). A friction block (5-9) on the top surface of the spring upper cover (5-3) contacts a lower seat plate (5-5) provided at the bottom of the vehicle frame, and the movement range of the friction block (5-9) is limited by a combination of a side block (6) and a traction rod device (7) hinged to the side block (6).

2. The three-axle bogie for a rail engineering tractor according to claim 1, characterized in that: The spring seat (5-4) is in the form of a waist-shaped ring structure with an open upper end and a sealed lower end. A rubber pad (5-2) is provided on the inner bottom surface of the spring seat (5-4), and a spring seat plate (5-6) is provided on the upper end surface of the rubber pad (5-2). A positioning sleeve (5-7) on the upper end surface of the spring seat plate (5-6) is adaptively connected to the lower end of the spring (5-1), and a positioning column (5-8) in the middle of the lower end surface of the spring seat plate (5-6) passes through the rubber pad (5-2) and is positioned on the bottom surface of the spring seat (5-4).

3. The three-axle bogie for a rail engineering tractor according to claim 1, characterized in that: The friction block (5-9) is adapted to fit in the positioning groove (5-10) on the top surface of the spring upper cover (5-3), and the upper end surface of the friction block (5-9) protrudes out of the positioning groove (5-10) and contacts the bottom surface of the lower seat plate (5-5).

4. The three-axle bogie for a rail engineering tractor according to claim 1, characterized in that: The bearings (10) used in the bearing boxes (9) at both ends of the axles in the three groups of wheel set assemblies (2) are all the same, and the lateral clearance (a) of the bearings (10) in the bearing boxes (9) at both ends of the middle axle is greater than the lateral clearance (b) of the bearings (10) in the bearing boxes (9) at both ends of the axles.

5. The three-axle bogie for a track engineering tractor according to claim 4, characterized in that: The transverse gap (a) is the distance between the outer end surface of the inner bearing (10) of the bearing box (9) at both ends of the middle axle and the inner end surface of the shaft end retaining ring (11), and the transverse gap (b) is the distance between the outer end surface of the inner bearing (10) of the bearing box (9) at both ends of the axle and the inner end surface of the shaft end retaining ring (11).

6. The three-axle bogie for a track engineering tractor according to claim 4 or 5, characterized in that: The transverse gap (a) is 5 to 7 mm larger than the transverse gap (b).

7. The three-axle bogie for a rail engineering tractor according to any one of claims 1 to 5, characterized in that: The power drive system adopts a hydraulic drive system or an electric drive system.

8. The three-axle bogie for a track engineering tractor according to claim 7, characterized in that: Each wheel set in the three wheel set assemblies (2) is equipped with two unit brakes (12), and the unit brakes (12) adopt tread braking.

9. The three-axle bogie for a rail engineering tractor according to claim 8, characterized in that: The two unit brakes (12) on each set of wheels in the wheelset assemblies (2) at both ends are provided with parking brakes.

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