Cast steel high support
By designing cast steel high support with curved surface structure and linear contact, the existing cast steel shaft support is solved, and the problem of inflexible rotation and easy blockage is achieved, more flexible rotation and better lubrication effect are achieved, and the reliability and maintenance convenience of the support are improved.
Patent Information
- Application Number
- CN202510562290.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2025-03-28
- Filing Date
- 2025-04-30
- Publication Date
- 2025-06-17
AI Technical Summary
The existing cast steel rocker bearings have problems such as the rocker shaft deviation, inflexible rotation, difficulty in maintenance, and are easily blocked by garbage and rust, resulting in safety hazards and frequent replacement.
A cast steel high support is designed, with the top of the rocking shaft having a curved surface structure, the swing of the support and the top of the rocking shaft having a linear contact, cancel the original gap, and fill the sealing chamber with grease, and add grease channels and grease sealing plates to achieve lubrication and limiting.
Through linear contact and curved surface design, the rotation resistance caused by jamming and friction is avoided, making the bearing more flexible in rotation; grease lubrication and sealing plate limits effectively avoid garbage clogging and rust, improving the reliability and maintenance convenience of the bearing.
Smart Images
Figure CN120158982A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a high cast steel bearing, belonging to the technical field of railway bridges. Background Art
[0002] The cast steel rocker bearing came into being in the mid-20th century and has been widely used in ordinary railway bridges in China. After years of operation, it is found that there are problems such as rocker offset, inflexible rotation, and difficult maintenance, which pose certain safety hazards to the bridge and railway operation. The longitudinal offset of some rocker bearings even reaches 50 mm, posing a great safety hazard. Due to the relatively large overall height of the rocker bearing, once it topples, extremely serious accidents are bound to occur. At present, many railway bureaus have replaced a large number of cast steel rocker bearings.
[0003] After investigation, research and analysis, the main reasons for the diseases of the cast steel rocker bearing are mainly in two aspects: material and structure. Among them, the relatively soft material causes indentations on some components, which in turn makes it difficult for activities and reset. However, the material is a secondary reason, and the structure is the main reason, mainly including a small clearance in the rotating part, which makes it easy to be blocked by garbage and rust; in addition, the contact between rotating parts is a surface contact. Once they are stuck, an additional bending moment is generated at the fixed end and rotation cannot continue; finally, this type of bearing is difficult to maintain, which in turn leads to serious corrosion of the components. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a high cast steel bearing with more reasonable structural stress, convenient maintenance, more flexible rotation and translation, and no diseases such as blockage by garbage and rust.
[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows:
[0006] A high cast steel bearing includes a bottom plate, a rocker is arranged on the bottom plate, a bearing upper swing is arranged on the rocker, the top of the rocker is a curved surface structure, the contact mode between the lower surface of the bearing upper swing and the top of the rocker is line contact, a sealing cavity is formed between the inner side surface of the bearing upper swing and the outer side surface of the rocker, the sealing cavity is filled with grease, a grease injection channel communicating with the sealing cavity is opened on the side surface of the bearing upper swing along the longitudinal direction of the bridge, grease blocking plates for sealing the sealing cavity are respectively arranged at both ends of the bearing upper swing along the transverse direction of the bridge, and an upper swing clamping plate is arranged on the side surface of the rocker below the grease blocking plate.
[0007] The grease injection channel is located at the middle position of the side surface of the bearing upper swing.
[0008] The grease injection channel includes a transverse channel and a vertical channel that are connected. The transverse channel communicates with the outside, and the vertical channel communicates with the sealing cavity.
[0009] The maximum rotation angle between the rocking shaft and the upper swing of the support is 0.2 rad.
[0010] The grease blocking plate is arranged in parallel with the upper swing clamping plate.
[0011] A toothed plate is arranged inside the bottom plate, and the upper end of the toothed plate extends into the lower part of the rocking shaft.
[0012] The bottom plate and the toothed plate are fixed by rivets.
[0013] The bottom plate is fixed to the ground by anchor bolts.
[0014] A grease passage is arranged inside the rocking shaft, and the outlet of the grease passage contacts the upper surface of the bottom plate.
[0015] Advantages of the present invention: A cast steel high support provided by the present invention has a curved surface structure at the top of the rocking shaft. The contact mode between the lower surface of the upper swing of the support and the top of the rocking shaft is line contact, and the original gap between the upper swing and the rocking shaft is eliminated. Due to the elimination of the gap, it can overcome the defect that the gap at the rotating part in the prior art is small and is easily blocked by garbage and rust. At the same time, the arc surface replaces the plane, and the line contact replaces the surface contact, which can avoid the large rotational resistance caused by friction during surface contact, thereby making its rotation more flexible. Even in the case of being dead-ended at one end, it can still rotate flexibly; in addition, a sealing cavity is formed between the inner side surface of the upper swing of the support and the outer side surface of the rocking shaft, and the sealing cavity is filled with grease. A grease injection passage communicating with the sealing cavity is arranged on the side surface of the upper swing along the longitudinal direction of the bridge. After adding the grease passage, it can effectively lubricate and fill the gap of the component at the same time to avoid garbage stuffing; finally, grease blocking plates for sealing the sealing cavity are respectively arranged at both ends of the upper swing of the support along the transverse direction of the bridge. An upper swing clamping plate is arranged below the grease blocking plate on the side surface of the rocking shaft. While playing the role of blocking grease, the grease blocking plate can cooperate with the upper swing clamping plate to limit the rotation angle of the upper swing of the support and play a limiting role. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic cross-sectional structure diagram of a cast steel high support of the present invention along the longitudinal direction of the bridge;
[0017] Figure 2 is a schematic cross-sectional structure diagram of a cast steel high support of the present invention along the transverse direction of the bridge;
[0018] The reference numerals in the drawings are as follows: 1 - upper swing of the support; 2 - grease injection passage; 3 - sealing cavity; 4 - rocking shaft; 5 - toothed plate; 6 - rivet; 7 - bottom plate; 8 - anchor bolt; 9 - grease blocking plate; 10 - upper swing clamping plate; 11 - grease passage. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.
[0020] As Figure 1 and Figure 2 shown, the present invention discloses a high cast steel support, including a bottom plate 7, on which a rocker shaft 4 is provided, and on the rocker shaft 4, an upper swing 1 of the support is provided. Before improvement, the side surface at the top of the rocker shaft 4 is a plane, and the contact mode between the upper swing 1 of the support and the top of the rocker shaft 4 is surface contact. The improvement point of this application is that the side surface at the top of the rocker shaft 4 is designed as a curved surface, and the contact mode between the upper swing 1 of the support and the top of the rocker shaft 4 is line contact, which can avoid jamming here and generating additional internal forces, that is, completely release the rotational freedom. At the same time, the original gap between the upper swing and the rocker shaft is cancelled, which can overcome the defect in the prior art that the gap at the rotating part is small and is easily blocked by garbage and rust.
[0021] A sealing cavity 3 is formed between the inner side surface of the upper swing 1 of the support and the outer side surface of the rocker shaft 4. The sealing cavity 3 is filled with grease. An oil pressing channel 2 communicating with the sealing cavity 3 is provided on the side surface of the upper swing 1 along the longitudinal direction of the bridge. The rusting and garbage blocking of the rotating part are mainly due to insufficient maintenance, during which the gap is blocked by rust and garbage. After adding the grease channel, it can effectively lubricate and at the same time fill the gap of the component to avoid garbage jamming.
[0022] Existing rocker shaft supports usually set a clamping groove in the middle of the component to perform lateral limit on the component. In order to ensure that the grease does not flow out or flows out less after injection, the position of the clamping groove (grease blocking plate 9) is adjusted from the middle to both sides. Grease blocking plates 9 for sealing the sealing cavity 3 are respectively provided at both ends of the upper swing 1 of the support along the transverse direction of the bridge. The grease blocking plates 9 and the upper swing 1 of the support are cast as a whole. The grease blocking plates 9 protrude to the outside of the upper swing 1 of the support, and at the same time, the bottom edge remains a plane. An upper swing clamping plate 10 is provided on the side surface of the rocker shaft 4 below the grease blocking plate 9. The upper swing clamping plate 10 protrudes to the outside of the rocker shaft 4 and maintains a certain distance. On the one hand, the grease blocking plate 9 can ensure that the sealing cavity 3 between the rocker shaft 4 and the upper swing 1 of the support is filled with grease, keep lubricated, and prevent the grease from overflowing. On the other hand, it can limit the rotational freedom when the rotational movement amount of the upper swing 1 of the support is too large.
[0023] The invention provides a contact mode between the lower surface of the upper swing of the support and the top of the rocker shaft as line contact, and cancels the original gap between the upper swing and the rocker shaft. Due to the cancellation of the gap, the defect that the gap of the rotating part in the prior art is small and easy to be blocked by garbage and rust can be overcome. At the same time, the arc surface replaces the plane, and the line contact replaces the surface contact, which can avoid the large rotational resistance caused by friction during surface contact, so that its rotation is more flexible. Even in the case of single-end dead stop, it can rotate flexibly. In addition, after adding the grease channel, it can be effectively lubricated, and at the same time, the gap of the component is filled to avoid garbage jamming. Finally, while playing the role of blocking grease, the grease blocking plate can cooperate with the upper swing clamping plate to limit the rotation angle of the upper swing of the support and play a limiting role.
[0024] Embodiment 2
[0025] As Figure 1 and Figure 2 As shown, the invention discloses a cast steel high support, which includes a bottom plate 7. A rocker shaft 4 is arranged on the bottom plate 7, and an upper swing 1 of the support is arranged on the rocker shaft 4. Before improvement, the side surface of the top of the rocker shaft 4 is a plane, and the contact mode between the upper swing 1 of the support and the top of the rocker shaft 4 is surface contact. The improvement point of this application is that the side surface of the top of the rocker shaft 4 is designed as a curved surface, and the contact mode between the upper swing 1 of the support and the top of the rocker shaft 4 is line contact, which can avoid jamming here and generating additional internal forces, that is, completely release the rotational freedom. At the same time, the original gap between the upper swing and the rocker shaft is cancelled, and the defect that the gap of the rotating part in the prior art is small and easy to be blocked by garbage and rust can be overcome.
[0026] A sealing cavity 3 is formed between the inner side surface of the upper swing 1 of the support and the outer side surface of the rocker shaft 4. The sealing cavity 3 is filled with grease. A grease injection channel 2 communicating with the sealing cavity 3 is arranged on the side surface of the upper swing 1 along the bridge longitudinal direction. The rust and garbage blockage of the rotating part are mainly due to insufficient maintenance, and the gap is blocked by rust and garbage during this period. After adding the grease channel, it can be effectively lubricated, and at the same time, the gap of the component is filled to avoid garbage jamming. The grease injection channel 2 is located at the middle position of the side surface of the upper swing 1 of the support. The grease injection channel 2 includes a transverse channel and a vertical channel that are connected. The transverse channel is connected to the outside, and the vertical channel is connected to the sealing cavity 3. It is injected from top to bottom and from the middle to both sides to ensure sufficient injection.
[0027] Existing rocker bearings usually have a clamping groove provided in the middle of the component to laterally limit the component. To ensure that the grease does not leak or leaks less after injection, the position of the clamping groove (grease sealing plate 9) is adjusted from the middle to both sides. On both ends of the upper swing 1 of the bearing along the transverse bridge direction, there are respectively provided grease sealing plates 9 for sealing the sealing cavity 3. The grease sealing plates 9 and the upper swing 1 of the bearing are cast as one body. The grease sealing plates 9 protrude to the outside of the upper swing 1 of the bearing, and at the same time, the bottom edge remains flat. An upper swing clamping plate 10 is provided below the grease sealing plate 9 on the side of the rocker 4. The upper swing clamping plate 10 protrudes to the outside of the rocker 4 and maintains a certain distance. On the one hand, the grease sealing plate 9 can ensure that the sealing cavity 3 between the rocker 4 and the upper swing 1 of the bearing is filled with grease, maintain lubrication, and prevent the grease from overflowing. On the other hand, it can limit the rotational freedom when the rotational movement of the upper swing 1 of the bearing is too large. Specifically, the grease sealing plate 9 and the upper swing clamping plate 10 are arranged in parallel, and the maximum rotation angle between the rocker 4 and the upper swing 1 of the bearing is 0.2 rad. That is, when the upper swing 1 of the bearing rotates by 0.2 rad, the grease sealing plate 9 and the upper swing clamping plate 10 will abut against each other to limit the continued rotation of the upper swing 1 of the bearing.
[0028] A tooth plate 5 is arranged inside the bottom plate 7, and the upper end of the tooth plate 5 extends into the lower part of the rocker 4. A grease passage 11 is opened in the rocker 4, and the outlet of the grease passage 11 contacts the upper surface of the bottom plate 7, which can improve the sliding effect between the rocker 4 and the bottom plate 7. The bottom plate 7 and the tooth plate 5 are fixed by rivets 6. The specifications of the bottom plate 7 and the rivets 6 are determined according to calculations to prevent fracture. The bottom plate 7 is fixed to the ground by anchor bolts 8. The rocker bearing realizes the horizontal translation function through the fixed bottom of the rocker and the horizontal swing at the top. The fixation of the bottom of the rocker 4 is realized by the tooth plate 5 or the pin. According to the existing investigation data, the main reason for the longitudinal deviation of the rocker is that the tooth plate / pin has a small ability to resist the longitudinal horizontal force. Based on this, the longitudinal shear bearing capacity can be increased by increasing the size of the tooth plate or the pin to avoid the longitudinal deviation of the rocker.
[0029] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. A cast steel high support, characterized in that: The invention comprises a bottom plate (7), a rocking shaft (4) being arranged on the bottom plate (7), a support upper pendulum (1) being arranged on the rocking shaft (4), the top of the rocking shaft (4) being a curved surface structure, the contact mode between the bottom of the support upper pendulum (1) and the top of the rocking shaft (4) being line contact, a sealing cavity (3) being formed between the inner side surface of the support upper pendulum (1) and the outer side surface of the rocking shaft (4), the sealing cavity (3) being filled with grease, a grease pressure-injection channel (2) communicating with the sealing cavity (3) being provided on the side surface of the support upper pendulum (1) along the longitudinal direction of the bridge, grease sealing plates (9) for sealing the sealing cavity (3) being provided at the two side ends of the support upper pendulum (1) along the transverse direction of the bridge, respectively, and an upper pendulum clamping plate (10) being provided on the side surface of the rocking shaft (4) below the grease sealing plate (9).
2. The cast steel high support according to claim 1, characterized in that: The grease pressing channel (2) is located in the middle of the side of the support upper pendulum (1).
3. The cast steel high support according to claim 1, characterized in that: The grease pressing channel (2) comprises a transverse channel and a vertical channel which are connected to each other, the transverse channel is connected to the outside, and the vertical channel is connected to the sealing cavity (3).
4. The cast steel high support according to claim 1, characterized in that: The maximum rotation angle between the rocking shaft (4) and the support upper pendulum (1) is 0.2 rad.
5. The cast steel high support according to claim 1, characterized in that: The grease sealing plate (9) is arranged in parallel with the upper swing clamping plate (10).
6. The cast steel high support according to claim 1, characterized in that: A tooth plate (5) is arranged inside the bottom plate (7), and the upper end of the tooth plate (5) extends into the lower part of the rocking shaft (4).
7. The cast steel high support according to claim 6, characterized in that: The base plate (7) and the tooth plate (5) are fixed via rivets (6), and the base plate (7) is fixed to the ground via anchor bolts (8).
8. The cast steel high support according to claim 1, characterized in that: A grease channel (11) is provided in the rocking shaft (4), and an outlet of the grease channel (11) contacts the upper surface of the bottom plate (7).