A limiting device for the roller of the lower side bearing of a railway freight car bogie
By adding limit plates to the lower side seat of the railway truck bogie, non-fixed limits on the roller shaft are achieved, the problem of roller and roller shaft separation is solved, the stability and safety of the truck are improved, and the replacement process of roller and roller shaft is simplified.
Patent Information
- Application Number
- CN202421627173.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The double-acting often-contact elastic side bearing device of existing railway truck bogies can easily cause the rollers and roller shafts to detach from the lower side bearing seats and cannot be reset, resulting in the trucks being easily derailed.
A railway truck bogie under the side bearing roller limiting device is designed. By adding a limiting plate to the shaft groove position of the lower side bearing seat, the non-fixed limiting of the roller shaft is realized, the roller and roller shaft are avoided from being separated, and the screw groove of the lower side bearing seat is connected through bolts to realize the removable assembly of the limiting plate.
It effectively limits the disengagement of rollers and roller shafts, prevents the truck from derailing, and the detachable design of the limiting plate is convenient for replacement of damaged rollers and roller shafts.
Smart Images
Figure CN222713474U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of railway freight car parts, in particular to a side bearing roller limiting device at the bottom of a railway freight car bogie. Background Art
[0002] At present, the side bearings of the bogies of railway freight cars are double-acting constant contact elastic side bearings, which are composed of roller shafts, rigid rollers, lower side bearing seats, upper side bearings, and elastic side bearing bodies. Since there is no gap between the upper and lower side bearings of the constant contact elastic side bearings and there is contact elasticity, the rolling stability of the car body on the bogie is increased. At the same time, in order to prevent the car body from having too large an inclination angle when the freight car is running on a curve, a rigid roller is used to limit the compression of the elastic side bearing. Once the upper side bearing is pressed against the roller, not only the inclination angle of the car body is limited, but also the rolling resistance torque will not increase due to the rolling of the roller, which affects the performance of the freight car passing through the curve.
[0003] The lower side bearing seat of the double-acting normally contact elastic side bearing device only limits the free movement of the roller in the horizontal direction; it cannot limit the free movement of the roller in the vertical direction. The existing double-acting normally contact elastic side bearing device of the railway freight car bogie has the following problems in use: when the railway freight car is unloaded and rotated 180° by the dumper, the roller and the roller shaft can easily break away from the restriction of the lower side bearing seat and cannot be reset and lost. When the railway freight car passes through a curve, the steel structure of the car body tilts due to the centrifugal force. Since the roller and the roller shaft are lost and there is no auxiliary load-bearing, the railway freight car is easy to derail. Utility Model Content
[0004] The main purpose of the utility model is to provide a side bearing roller limiting device for a railway freight car bogie, which can effectively solve the problems in the background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A railway freight car bogie lower side bearing roller limiting device comprises a lower side bearing seat, an elastic side bearing body is arranged at one end inside the lower side bearing seat, an upper side bearing is arranged above the elastic side bearing body, a roller is arranged at the other end inside the lower side bearing seat, roller shafts are arranged at both ends of the roller, the lower side bearing seat is provided with shaft grooves at the position of the roller shaft, the roller shafts are inserted in the shaft grooves, key grooves are cut at both sides of the top of the lower side bearing seat at the shaft groove position, screw grooves are cut at the end of the lower side bearing seat at the key groove away from each other, a limiting plate is arranged above the lower side bearing seat at the shaft groove position, cross keys are fixed at both ends of the bottom of the limiting plate, mounting grooves are cut at the end of the limiting plate at the cross key away from each other, and bolts are inserted in the mounting grooves.
[0007] Preferably, the positions of the cross keys match the positions of the key slots, and the cross keys are inserted inside the cross keys.
[0008] Preferably, the outer dimensions of the cross key match the inner dimensions of the keyway.
[0009] Preferably, one end of the bolt passes through the installation slot and is respectively inserted into the interior of the screw slot and threadedly connected thereto.
[0010] Preferably, the horizontal line of the top of the roller shaft is below the horizontal line of the bottom of the limiting plate.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. The lower side bearing seat can perform non-fixed limiting on the roller shafts at both ends of the roller by adding a limit plate at the top of the shaft groove position, which can limit the roller and the roller shaft from leaving the lower side bearing seat, and prevent the roller and the roller shaft from being lost when the tipping machine on the railway freight car is unloading, eliminating the safety hazard of railway freight car derailment.
[0013] 2. The limit plate is inserted into the screw groove of the lower side bearing seat after passing through its own mounting groove through the bolts, so as to achieve the effect of detachable assembly and disassembly of the limit plate and the lower side bearing seat, so that when the roller shaft is broken due to factors such as material fatigue and stress concentration, the roller and the roller shaft can be replaced as a whole. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a side view structural schematic diagram of a side bearing roller limiting device of a railway freight car bogie according to the utility model;
[0015] Figure 2 This is a schematic diagram of the top view of the structure of a side bearing roller limiting device of a railway freight car bogie according to the utility model;
[0016] Figure 3 This is a schematic diagram of the positions of screw grooves and key grooves of a side bearing roller limiting device of a railway freight car bogie according to the utility model;
[0017] Figure 4 The utility model is a structural schematic diagram of the position of a limit plate of a lower side bearing roller limit device of a railway freight car bogie.
[0018] In the figure: 1, lower side bearing; 11, shaft groove; 12, screw groove; 13, keyway; 2, limit plate; 21, mounting groove; 22, bolt; 23, cross key; 3, roller; 4, roller shaft; 5, upper side bearing; 6, elastic side bearing body. DETAILED DESCRIPTION
[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0020] like Figure 1-4 As shown, a lower side bearing roller limiting device for a railway freight car bogie comprises a lower side bearing seat 1, an elastic side bearing body 6 is arranged at one end inside the lower side bearing seat 1, an upper side bearing 5 is arranged above the elastic side bearing body 6, a roller 3 is arranged at the other end inside the lower side bearing seat 1, roller shafts 4 are arranged at both ends of the roller 3, shaft grooves 11 are bored at the position of the roller shaft 4 of the lower side bearing seat 1, the roller shafts 4 are inserted inside the shaft groove 11, key grooves 13 are bored at both sides of the top of the lower side bearing seat 1 at the position of the shaft groove 11, screw grooves 12 are bored at one end of the lower side bearing seat 1 away from the key groove 13, a limiting plate 2 is arranged above the lower side bearing seat 1 at the position of the shaft groove 11, cross keys 23 are fixed at both ends of the bottom of the limiting plate 2, mounting grooves 21 are bored at one end of the limiting plate 2 away from the cross key 23, bolts 22 are inserted inside the mounting groove 21.
[0021] Specifically, the position of the cross key 23 matches the position of the key slot 13, and the cross key 23 is inserted into the inside of the cross key 23, and the outer dimensions of the cross key 23 match the inner dimensions of the key slot 13, so that the connection between the limit plate 2 and the lower side support seat 1 is more compact.
[0022] Specifically, one end of the bolt 22 passes through the installation slot 21 and is respectively inserted into the interior of the screw slot 12 and threadedly connected therewith, so as to facilitate assembly and disassembly.
[0023] Specifically, the horizontal line of the top of the roller shaft 4 is located below the horizontal line of the bottom of the limiting plate 2 to avoid touching the limiting plate 2.
[0024] Working principle: The lower side bearing seat 1 can perform non-fixed limiting on the roller shafts 4 at both ends of the roller 3 by means of a limiting plate 2 additionally provided at the top of the shaft groove 11, and can limit the roller 3 and the roller shaft 4 from being separated from the lower side bearing seat 1, thereby preventing the roller 3 and the roller shaft 4 from being lost when the dumper on the railway freight car is unloading goods, and eliminating the potential safety hazard of railway freight car derailment. The limiting plate 2 is inserted into the screw groove 12 of the lower side bearing seat 1 after passing through its own mounting groove 21 through the bolt 22, so as to achieve the effect of detachable assembly and disassembly of the limiting plate 2 and the lower side bearing seat 1, so that when the roller shaft 4 of the roller 3 is broken due to factors such as material fatigue and stress concentration, the roller 3 and the roller shaft 4 can be replaced as a whole;
[0025] Disassembly: Rotate the bolt 22 to first rotate it out of the screw groove 13, and then pull it out of the installation groove 21, then pinch the limit plate 2 and lift it up so that the cross key 23 can be pulled out of the key groove 13, and then the disassembly is completed, and then the short shaft can be removed from the shaft groove 11;
[0026] Installation: Place the roller shaft 4 at the end of the new roller 3 into the shaft groove 11, then place the limit plate 2 on the shaft groove 11, and align the cross key 23 with the key groove 13 and insert it until the bottom of the limit plate 2 touches the top of the lower side bearing seat 1 at the position of the shaft groove 11. At this time, the position of the mounting groove 21 matches the position of the screw groove 12. Finally, align the bolt 22 with the mounting groove 21 and penetrate it. After passing through the mounting groove 21, it is inserted into the screw groove 12 and rotated to make it threadedly connected with the inner wall of the screw groove 12 until the limit plate 2 can be stably located on the top of the roller shaft 4 without shaking, and the safety work can be completed.
[0027] The circuits, electronic components and control modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to software and methods.
[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A lower side bearing roller limiting device for a railway freight car bogie, comprising a lower side bearing seat (1), characterized in that: An elastic side bearing body (6) is provided at one end of the lower side bearing seat (1), an upper side bearing (5) is provided above the elastic side bearing body (6), a roller (3) is provided at the other end of the lower side bearing seat (1), roller shafts (4) are provided at both ends of the roller (3), an axis groove (11) is cut at the position of the roller shaft (4) of the lower side bearing seat (1), the roller shaft (4) is inserted into the axis groove (11), and the top of the lower side bearing seat (1) is located at the position of the axis groove (11). A key groove (13) is bored on both sides of the lower side bearing seat (1), a screw groove (12) is bored on one end of the lower side bearing seat (1) which is away from the key groove (13), a limit plate (2) is arranged above the lower side bearing seat (1) at the position of the shaft groove (11), a cross key (23) is fixed on both ends of the bottom of the limit plate (2), a mounting groove (21) is bored on one end of the limit plate (2) which is away from the cross key (23), and a bolt (22) is inserted into the inside of the mounting groove (21).
2. The side bearing roller limiting device for a railway freight car bogie according to claim 1, characterized in that: The positions of the cross keys (23) respectively match the positions of the key slots (13), and the cross keys (23) are respectively inserted into the interior of the cross keys (23).
3. The lower side bearing roller limiting device of a railway freight car bogie according to claim 1 is characterized in that: The outer dimensions of the cross key (23) respectively match the inner dimensions of the keyway (13).
4. The railway freight car bogie lower side bearing roller limiting device according to claim 1, characterized in that: One end of the bolt (22) passes through the installation groove (21) and is respectively inserted into the interior of the screw groove (12) and threadedly connected thereto.
5. The lower side bearing roller limiting device of a railway freight car bogie according to claim 1, characterized in that: The horizontal line at the top of the roller shaft (4) is located below the horizontal line at the bottom of the limiting plate (2).