CN114233778B - Brake cylinder for track traffic and brake clamp unit thereof - Google Patents
Brake cylinder for track traffic and brake clamp unit thereof Download PDFInfo
- Publication number
- CN114233778B CN114233778B CN202111419027.0A CN202111419027A CN114233778B CN 114233778 B CN114233778 B CN 114233778B CN 202111419027 A CN202111419027 A CN 202111419027A CN 114233778 B CN114233778 B CN 114233778B
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- CN
- China
- Prior art keywords
- brake
- oil cylinder
- elastic sealing
- sealing element
- piston
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/62—Slack adjusters mechanical self-acting in both directions for adjusting excessive and insufficient play
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
Abstract
The invention discloses a brake cylinder for rail transit and a brake clamp unit thereof. The brake oil cylinder comprises an oil cylinder (1), an oil inlet (8) is formed in the oil cylinder, a piston (5-2) is arranged in the oil cylinder, one end of a piston rod (5) of the piston extends out of the oil cylinder, an elastic sealing element (3) capable of elastically deforming along the axial direction of the oil cylinder is arranged in the oil cylinder, and a sealing oil cavity communicated with the oil inlet is formed in the elastic sealing element; the elastic sealing element is sleeved on the piston, one end of the elastic sealing element is connected with the inner cavity wall of the oil cylinder, and the other end of the elastic sealing element is connected with the piston; the distance between the elastic sealing element and the extending end of the piston rod of the oil cylinder is larger than or equal to the working stroke (X) of the elastic sealing element. The invention can ensure the normal clearance between the brake disc and the brake pad after relieving, and can not cause the virtual adhesion of the brake pad and the brake disc, so that grinding particles generated by braking friction can be smoothly discharged.
Description
Technical Field
The invention relates to a rail transit vehicle braking system, in particular to a braking cylinder for rail transit and a braking clamp unit thereof.
Background
Along with the rapid development of national economy, the urban process is accelerated, and people put higher demands on the travel safety of rail transit. The brake caliper unit is used as a final actuating device of the brake system, and must safely and reliably ensure that the vehicle is stopped within a prescribed braking distance during emergency braking to ensure running safety.
The existing hydraulic brake clamp comprises a clamp body, oil cylinders and brake pads, wherein two oil cylinders are oppositely arranged on the clamp body, one ends of piston rods of the two oil cylinders extend out of cylinder holes respectively and are propped against corresponding brake pads, and the two brake pads are in friction with a brake disc through opposite propping of the piston rods of the two oil cylinders on the corresponding brake pads, so that braking is achieved. Although the scheme can realize stable braking, when oil drainage is released, the piston rod is not automatically reset due to the lack of a corresponding reset structure (limited by a narrow installation space), so that the gap between a brake pad and a brake disc is almost zero in the released state, and is in the virtual adhesion state, a large amount of grinding particles generated by braking friction cannot be smoothly discharged, the brake disc is possibly burnt and scratched, the brake disc and the brake pad are possibly invalid in serious cases, thereby reducing the braking friction coefficient, effectively ensuring that the railway vehicle is stopped at a specified braking distance, influencing driving safety-!
Disclosure of Invention
Aiming at the problem that the piston rod can not be automatically reset when the existing brake clamp is in a release state, the invention provides the brake cylinder for the rail transit and the brake clamp unit thereof, which have the advantages of simple and compact overall structure, simplicity and convenience in installation and maintenance, stable performance and better brake effect.
In order to solve the technical problems, the invention adopts the following technical scheme:
the brake oil cylinder for track traffic comprises an oil cylinder, wherein an oil inlet is arranged on the oil cylinder, a piston is arranged in the oil cylinder, one end of a piston rod of the piston extends out of the oil cylinder, the structure is characterized in that,
the oil cylinder is internally provided with an elastic sealing element capable of generating elastic deformation along the axial direction of the oil cylinder, and a sealing oil cavity communicated with the oil inlet is arranged in the elastic sealing element;
the elastic sealing element is sleeved on the piston, one end of the elastic sealing element is connected with the inner cavity wall of the oil cylinder, and the other end of the elastic sealing element is connected with the piston;
the distance between the elastic sealing element and the extending end of the piston rod of the oil cylinder is larger than or equal to the working stroke of the elastic sealing element.
When braking, the corresponding valve of the hydraulic braking system is opened, hydraulic oil flows into the oil cavity of the elastic sealing element from the oil inlet of the oil cylinder, so that the piston rod further extends outwards under the action of oil pressure, and the piston rod is connected with the elastic sealing element in a sealing way, so that the elastic sealing element extends along the axis of the oil cylinder at the same time to push the braking brake pad, so that the braking brake pad is pressed against the braking disc to generate a braking effect, meanwhile, the elastic sealing element stores the energy of the reset piston rod due to the extension, and when oil leakage is relieved, the elastic sealing element provides the stored energy for the piston rod to automatically reset (the piston rod is retracted along with the elastic sealing element under the action of the spring force of the elastic sealing element to reach a relieving position), so that the normal gap between the braking disc and the braking brake pad is ensured, and a large amount of grinding particles generated by braking friction can be smoothly discharged, thereby ensuring that the braking performance of the braking clamp is more stable, the braking effect is better, and running is safer.
Preferably, the elastic sealing element is a rubber member incorporating a spring wire.
Preferably, one end of the elastic sealing element is provided with a large hole in an open shape, the other end of the elastic sealing element is provided with a small hole matched with the piston rod, the large hole end is in sealing connection with the inner cavity wall of the oil cylinder, and the small hole end is in sealing connection with the piston.
Preferably, a steel skeleton is arranged in the small hole end of the elastic sealing element so as to ensure the structural rigidity of the small hole end of the elastic sealing element and ensure the working clearance X of the elastic sealing element.
Preferably, the large hole end of the elastic sealing element is hollowed out and is in sealing connection with the inner cavity wall of the oil cylinder, the small hole end is arranged to be a right end plane, at least one section of convex arc and one section of concave arc are included between the small hole end and the large hole end, and the convex arc and the concave arc are connected end to end into a whole.
Preferably, the small hole end of the elastic sealing element is concavely provided with a boss, and the boss abuts against the right end face of the piston and is in sealing connection with the right end face of the piston.
Preferably, the working stroke X of the elastic sealing element is greater than the clearance Y created by the brake disc and the brake pads after the wear limit.
Preferably, the piston is arranged in the middle of the piston rod, and the other end of the piston rod and the piston are arranged in the sealed oil cavity.
Based on the same inventive concept, the invention also provides a brake clamp unit for rail transit, which comprises a clamp body, a brake cylinder and brake pads, wherein two brake cylinders are oppositely arranged on the clamp body, and one ends of piston rods of the two brake cylinders respectively extend out of the brake cylinder and are connected with the corresponding brake pads.
In order to accurately install the oil cylinders, the brake is more reliable, the oil cylinders are connected with the clamp body through bolts, the bolts penetrate through the oil cylinders to be fixedly connected with the clamp body, and the oil cylinders are installed on the clamp body in pairs.
Compared with the prior art, the invention has the beneficial effects that:
the brake clamp unit can effectively solve the problem that the piston can not automatically reset when the hydraulic brake clamp releases oil leakage;
the brake clamp unit can ensure the normal clearance between the brake disc and the brake pad after being relieved, and cannot cause the brake pad to be in virtual adhesion with the brake disc, so that grinding particles generated by braking friction can be smoothly discharged, the brake disc and the brake pad cannot be scratched, and the braking is safe and reliable.
The brake cylinder of the brake clamp unit is internally provided with the elastic deformation element, the elastic deformation element and the piston are connected in a sealing way, no extra space volume is added, the structure is simple and compact, and the installation and maintenance are simple and convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a brake caliper unit of the present invention.
Fig. 2 is a cross-sectional view of the brake caliper unit of the present invention.
Fig. 3 is a structural view of the brake cylinder of fig. 2 taken from the oil inlet.
Fig. 4 is a cross-sectional view of the elastically deformable element of the present invention in a relaxed state.
Fig. 5 is a cross-sectional view of the elastically deformable element of the present invention in a braked state.
In the figure: 1-oil cylinder, 2-1-oil cylinder inner cavity, 3-elastic deformation element, 4-brake pad, 5-piston rod, 6-sealed oil cavity, 7-cylinder cover, 8-oil inlet, 9-clamp body and 10-brake disc.
Detailed Description
The invention is further described below in connection with specific preferred embodiments, but it is not intended to limit the scope of the invention.
For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described according to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.
As shown in fig. 1 to 3, an embodiment of the brake caliper unit for rail transit of the present invention includes: 1-oil cylinder, 2-1-oil cylinder inner cavity, 3-elastic deformation element, 4-brake pad, 5-piston rod, 6-sealed oil cavity, 7-cylinder cover, 8-oil inlet, 9-clamp body and 10-brake disc.
Referring to fig. 1, in order to ensure reliable braking, the cylinders 1 need to be installed correctly, in this embodiment, the cylinders 1 are connected to the caliper body 9 by bolts 11, and the bolts 11 pass through the cylinders 1 to be fixedly connected to the caliper body 9, and the cylinders 1 are installed in pairs on the caliper body 9.
Referring to fig. 3, the oil cylinder 1 includes a cylinder body 1-1 and a cylinder cover 7, wherein the cylinder cover 7 is integrated with the cylinder body 1-1 to form an oil cylinder inner cavity 2-1 with a cylindrical structure inside, an oil inlet 8 is arranged on the cylinder body 1-1, and a central hole 2-3 in clearance fit with a piston rod 5 is arranged at the right end of the cylinder body 1-1.
Referring to fig. 3 to 5, the elastically deformable element 3 is a rubber elastic sealing element, which is a rubber member having a special built-in spring wire 3-6 and a steel skeleton 3-5 in a wave-like shape. The elastic deformation element 3 is made of rubber which is resistant to low temperature and oil, and the elastic deformation element 3 can be stretched or shortened along the axial direction. One end of the elastic deformation element 3 is provided with a small hole matched with the piston rod 5, the other end is provided with a large hole in an open mouth shape, the small hole end is connected with the piston rod 5 in a sealing way, the large hole end is connected with the inner cavity wall of the oil cylinder 1 in a sealing way to form a sealed oil cavity 6 in the elastic deformation element 3, and the elastic deformation element 3, the piston rod 5 and the inner cavity wall of the oil cylinder form an integral sealing structure to ensure that hydraulic oil cannot overflow at the connection part of the piston rod 5 and the elastic deformation element 3 and the connection part of the inner cavity wall of the oil cylinder and the elastic deformation element 3. A convex arc 3-3 and a concave arc 3-4 which are connected end to end are arranged between the small hole end and the large hole end of the elastic deformation element 3, and the convex arc 3-3 is connected with the right end 3-2 of the elastic deformation element to form an integral structure. The shape of the spring steel wire 3-6 arranged in the elastic deformation element 3 is matched with that of the elastic deformation element 3, the elastic deformation element 3 is arranged in the middle of the wall thickness, and the spring steel wire 3-6 has certain rigidity and is pre-pressed and formed by a winding process. The steel skeleton 3-5 built in the right end 3-2 of the elastic deformation element is preformed by a process, and is vulcanized in the elastic deformation element 3, and is positioned at a central position in the wall thickness. During braking and relieving, the elastically deformable element 3 may undergo an axial elastic deformation elongation or shortening with the movement of the piston rod 5. During braking, the elastic deformation element 3 stores spring energy for resetting the piston rod 5 due to elongation, and when pressure relief is relieved, the stored energy is provided for automatically resetting the piston rod 5.
Referring to fig. 3, a piston 5-2 is disposed in the middle of the piston rod 5, a boss 3-1 is disposed at a small hole end of the elastic deformation element 3 in a concave manner, the elastic deformation element 3 is sleeved on the piston rod 5, the left end of the piston rod 5 and the piston 5-2 are disposed in the sealed oil cavity 6, the piston rod 5 is radially and hermetically connected with the elastic deformation element 3, meanwhile, the right end face of the piston 5-2 is hermetically connected with the boss 3-1 to form a dynamic seal structure, hydraulic oil enters the sealed oil cavity 6 through an oil inlet 8 and acts on the left end face of the piston 5-4 and the left end face of the piston 5-2, so that the elastic deformation element 3 is axially stretched and deformed, and stretching is stopped at the right end face 2-2 of the oil cylinder cavity. When the sealed oil cavity 6 is filled with oil and slightly expands, the wall of the inner cavity of the oil cylinder can support and protect the deformed elastic deformation element 3.
Referring to fig. 3, the working stroke X of the elastically deforming element 3 is greater than the gap Y generated after the wear limit of both the brake disc 10 and the brake pad 4.
Referring to fig. 3, the central hole 2-3 at the right end of the oil cylinder is in clearance fit with the piston rod 5, and plays a guiding role on the piston rod 5, so that the piston rod 5 can only move left and right along the central hole 2-3 at the right end of the oil cylinder.
Referring to fig. 1-3, two cylinders 1 are oppositely installed on the caliper body 9, one ends of piston rods 5 of the two cylinders 1 extend out of the cylinders 1 respectively and are connected with corresponding brake pads 4 through abutting portions 5-3 of the cylinders, and the brake pads 4 are installed in a clearance with a brake disc 10. When braking, the corresponding valve of the hydraulic braking system is opened, hydraulic oil flows in from the oil inlet 8 and then flows into the sealed oil cavity 6, so that the piston rod 5 further stretches out under the action of oil pressure and pushes against the brake pad 4, the brake pad 4 presses the brake disc 10, thereby generating braking action, meanwhile, the elastic deformation element 3 stretches out along with the further stretching out of the piston rod 5 to store the energy of resetting the piston rod 5, and when relieving pressure release, the elastic deformation element 3 provides the energy storage to enable the piston rod 5 to automatically reset, thereby ensuring the normal clearance between the brake disc 10 and the brake pad 4, and effectively discharging grinding particles generated by braking.
Those skilled in the art will appreciate that the drawings are schematic representations of only one preferred embodiment, and that the workflow in the drawings is not necessarily required to practice the invention.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (8)
1. The brake oil cylinder for track traffic comprises an oil cylinder (1), wherein an oil inlet (8) is arranged on the oil cylinder, a piston (5-2) is arranged in the oil cylinder, one end of a piston rod (5) of the piston extends out of the oil cylinder, and the brake oil cylinder is characterized in that,
the oil cylinder is internally provided with an elastic sealing element (3) capable of generating elastic deformation along the axial direction of the oil cylinder, and a sealing oil cavity communicated with the oil inlet is arranged in the elastic sealing element;
the elastic sealing element is sleeved on the piston, one end of the elastic sealing element is provided with an open-mouth-shaped large hole, the other end of the elastic sealing element is provided with a small hole matched with the piston rod, the large hole end of the elastic sealing element is in sealing connection with the inner cavity wall of the oil cylinder, and the small hole end is in sealing connection with the piston;
the distance between the elastic sealing element and the extending end of the piston rod of the oil cylinder is larger than or equal to the working stroke (X) of the elastic sealing element.
2. Brake cylinder for rail traffic according to claim 1, characterized in that the elastic sealing element is a rubber piece with built-in spring steel wires (3-6).
3. The brake cylinder for rail transit of claim 1, wherein a steel skeleton is provided in the small hole end.
4. The brake cylinder for track traffic according to claim 1, characterized in that at least one convex arc (3-3) and one concave arc (3-4) are included between the small hole end and the large hole end, and the convex arc and the concave arc are connected end to end into a whole.
5. The brake cylinder for track traffic according to claim 1, wherein the small hole end of the elastic sealing member is provided with a boss (3-1) recessed inward, and the boss abuts against and is in sealing connection with the right end face of the piston.
6. The brake cylinder for track traffic according to claim 1, wherein the working stroke of the elastic sealing member is larger than a gap generated after a wear limit of the brake disc and the brake pad.
7. The brake cylinder for track traffic according to claim 1, wherein the piston is provided in a middle portion of the piston rod, and the other end of the piston rod and the piston are disposed in the sealed oil chamber.
8. A brake clamp unit for rail transit, comprising a clamp body (9), a brake cylinder and a brake pad (4), wherein two brake cylinders are oppositely arranged on the clamp body, and one ends of piston rods (5) of the two brake cylinders respectively extend out of the brake cylinders and are connected with the corresponding brake pads, and the brake clamp unit is characterized in that the brake cylinder is one of the brake cylinders in claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111419027.0A CN114233778B (en) | 2021-11-26 | 2021-11-26 | Brake cylinder for track traffic and brake clamp unit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111419027.0A CN114233778B (en) | 2021-11-26 | 2021-11-26 | Brake cylinder for track traffic and brake clamp unit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114233778A CN114233778A (en) | 2022-03-25 |
| CN114233778B true CN114233778B (en) | 2023-08-08 |
Family
ID=80751221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111419027.0A Active CN114233778B (en) | 2021-11-26 | 2021-11-26 | Brake cylinder for track traffic and brake clamp unit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114233778B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015217884A (en) * | 2014-05-20 | 2015-12-07 | トヨタ自動車株式会社 | Regulator and hydraulic brake system |
| CN205244204U (en) * | 2015-11-30 | 2016-05-18 | 常州南车铁马科技实业有限公司 | Rail vehicle braking clamp oil expenses jar |
| CN209196003U (en) * | 2018-12-21 | 2019-08-02 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of wind power generating set fluid brake |
| CN110454524A (en) * | 2019-08-20 | 2019-11-15 | 三一重型装备有限公司 | Brake, braking system and vehicle |
| CN209754662U (en) * | 2018-12-25 | 2019-12-10 | 天水星火机床有限责任公司 | Heavy horizontal lathe main shaft hydraulic braking device |
| CN110701133A (en) * | 2019-11-13 | 2020-01-17 | 三一重机有限公司 | Hydraulic oil cylinder |
| JP2020044925A (en) * | 2018-09-18 | 2020-03-26 | 日立オートモティブシステムズ株式会社 | Stroke simulator and brake control device |
| DE102018221777A1 (en) * | 2018-12-14 | 2020-06-18 | Mando Corporation | Hydraulic system and brake system |
-
2021
- 2021-11-26 CN CN202111419027.0A patent/CN114233778B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015217884A (en) * | 2014-05-20 | 2015-12-07 | トヨタ自動車株式会社 | Regulator and hydraulic brake system |
| CN205244204U (en) * | 2015-11-30 | 2016-05-18 | 常州南车铁马科技实业有限公司 | Rail vehicle braking clamp oil expenses jar |
| JP2020044925A (en) * | 2018-09-18 | 2020-03-26 | 日立オートモティブシステムズ株式会社 | Stroke simulator and brake control device |
| DE102018221777A1 (en) * | 2018-12-14 | 2020-06-18 | Mando Corporation | Hydraulic system and brake system |
| CN209196003U (en) * | 2018-12-21 | 2019-08-02 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of wind power generating set fluid brake |
| CN209754662U (en) * | 2018-12-25 | 2019-12-10 | 天水星火机床有限责任公司 | Heavy horizontal lathe main shaft hydraulic braking device |
| CN110454524A (en) * | 2019-08-20 | 2019-11-15 | 三一重型装备有限公司 | Brake, braking system and vehicle |
| CN110701133A (en) * | 2019-11-13 | 2020-01-17 | 三一重机有限公司 | Hydraulic oil cylinder |
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| Publication number | Publication date |
|---|---|
| CN114233778A (en) | 2022-03-25 |
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