CN114233778A - Brake cylinder for rail transit and brake clamp unit thereof - Google Patents
Brake cylinder for rail transit and brake clamp unit thereof Download PDFInfo
- Publication number
- CN114233778A CN114233778A CN202111419027.0A CN202111419027A CN114233778A CN 114233778 A CN114233778 A CN 114233778A CN 202111419027 A CN202111419027 A CN 202111419027A CN 114233778 A CN114233778 A CN 114233778A
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- China
- Prior art keywords
- brake
- sealing element
- elastic sealing
- oil cylinder
- 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 generating elastic deformation along the axial direction of the oil cylinder is accommodated 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 brake pad to be attached to 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 oil cylinder for rail transit and a braking clamp unit thereof.
Background
Along with the rapid development of national economy, the urbanization process is accelerated, and people put higher requirements on the traveling safety of rail transit. The brake caliper unit serves as the final actuator of the brake system, and when the vehicle is braked suddenly, the vehicle must be safely and reliably ensured to stop within a specified braking distance so as to ensure the driving safety.
The conventional hydraulic brake clamp, as shown in chinese patent CN102943830A, includes a clamp body, two oil cylinders and brake pads, wherein the clamp body is relatively provided with two oil cylinders, one ends of piston rods of the two oil cylinders respectively extend out of a cylinder hole and abut against the corresponding brake pads, and the piston rods of the two oil cylinders press the corresponding brake pads in opposite directions to rub the two brake pads against the brake disc, thereby achieving braking. Although the stable braking can be realized by the scheme, when oil drainage is relieved, the piston rod cannot be automatically reset due to the fact that the piston rod lacks a corresponding reset structure (limited by a narrow installation space), the gap between the brake pad and the brake disc is almost zero in the relieving state and is in a virtual sticking 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 disabled in serious cases, the braking friction coefficient is reduced, the railway vehicle cannot be effectively guaranteed to stop at a specified braking distance, and driving safety is influenced!
Disclosure of Invention
Aiming at the problem that a piston rod cannot be automatically reset when the existing brake clamp is in a release state, the invention provides the brake oil cylinder for the rail transit and the brake clamp unit thereof, wherein the piston rod can be automatically reset, and the brake oil cylinder has the advantages of simple and compact integral structure, convenient installation and maintenance, stable performance and better brake effect.
In order to solve the technical problems, the invention adopts the following technical scheme:
a brake oil cylinder for rail transit 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, and the brake oil cylinder is structurally characterized in that,
an elastic sealing element which can generate elastic deformation along the axial direction of the oil cylinder is accommodated in 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 the oil pressure, and the piston rod and the elastic sealing element are connected into a whole in a sealing way, so that the elastic sealing element simultaneously extends along the axis of the oil cylinder and presses the brake pad to enable the brake pad to compress the brake disc to generate braking action, and meanwhile, the elastic sealing element stores the energy of the reset piston rod due to extension, when oil drainage is relieved, the elastic sealing element provides the stored energy to enable the piston rod to automatically reset (the piston rod returns along with the elastic sealing element under the spring force action of the elastic sealing element to reach a relieving position), so that normal clearance between the brake disc and the brake pad is ensured, a large amount of grinding particles generated by braking friction can be smoothly discharged, and the braking performance of the braking clamp is ensured to be more stable, the braking effect is better, and the driving is safer.
Preferably, the elastic sealing element is a rubber member with an internal 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 connected with the inner cavity wall of the oil cylinder in a sealing mode, and the small hole end is connected with the piston in a sealing mode.
Preferably, a steel skeleton is arranged in the small hole end of the elastic sealing element to ensure the structural rigidity of the small hole end of the elastic sealing element and ensure the working gap X of the elastic sealing element.
Preferably, the big hole end of the elastic sealing element is hollowed and is connected with the inner cavity wall of the oil cylinder in a sealing mode, the small hole end is arranged to be a right end plane, the small hole end and the big hole end at least comprise one section of convex circular arc and one section of concave circular arc, and the convex circular arc and the concave circular arc are connected end to end into a whole.
Preferably, a boss is concavely arranged at the small hole end of the elastic sealing element, and the boss abuts against the right end face of the piston and is connected with the right end face of the piston in a sealing mode.
Preferably, the working stroke X of the elastic sealing element is greater than the clearance Y created by the brake disc and the brake pad 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 invention concept, the invention also provides a brake clamp unit for rail transit, which comprises a clamp body, two brake oil cylinders and brake pads, wherein the two brake oil cylinders are oppositely arranged on the clamp body, one ends of piston rods of the two brake oil cylinders respectively extend out of the brake oil cylinders and are connected with the corresponding brake pads, and the brake clamp unit is structurally characterized in that the brake oil cylinders are the brake oil cylinders.
In order to correctly install the oil cylinders and be more reliable in braking, the oil cylinders are connected with the caliper body through bolts, the bolts penetrate through the oil cylinders to be fixedly connected with the caliper body, and the oil cylinders are installed on the caliper 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 cannot be automatically reset when oil leakage of the hydraulic brake clamp is relieved;
the brake clamp unit can ensure the normal clearance between the brake disc and the brake pad after relieving, and can not cause the brake pad to be attached to the brake disc, so that grinding particles generated by brake friction can be discharged smoothly, the brake disc and the brake pad can not be scratched, and the brake is safe and reliable.
The elastic deformation element is arranged in the brake cylinder of the brake clamp unit, and the elastic deformation element and the piston are hermetically connected and integrated into a whole, so that no additional space volume is added, the structure is simple and compact, and the installation and the 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 used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a brake caliper unit according to 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 in fig. 2, cut away from an oil inlet.
Fig. 4 is a cross-sectional view of an elastically deformable element of the invention in a relaxed state.
Fig. 5 is a cross-sectional view of the elastically deformable element of the present invention in a braking state.
In the figure: 1-oil cylinder, 2-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 with reference to specific preferred embodiments, without thereby limiting the scope of protection 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 with reference 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 according to the present invention includes: 1-oil cylinder, 2-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 oil cylinders 1 need to be correctly installed, in this embodiment, the oil cylinders 1 are connected with the caliper body 9 through bolts 11, the bolts 11 penetrate through the oil cylinders 1 to be fixedly connected with the caliper body 9, and the oil cylinders 1 are installed on the caliper body 9 in pairs.
Referring to fig. 3, the oil cylinder 1 comprises a cylinder body 1-1 and a cylinder cover 7, the cylinder cover 7 and the cylinder body 1-1 are combined into a whole to form an oil cylinder inner cavity 2-1 with a cylindrical structure in the cylinder body, 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 formed in the right end of the cylinder body 1-1.
Referring to fig. 3-5, the elastic deformation element 3 is a rubber elastic sealing element, which is a rubber member with a built-in special spring steel wire 3-6 and a steel skeleton 3-5, and the shape of the rubber member is wave-shaped. 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 extended 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 of the elastic deformation element is provided with a large hole in an open shape, the end of the small hole is connected with the piston rod 5 in a sealing mode, the end of the large hole is connected with the wall of the inner cavity of the oil cylinder 1 in a sealing mode, a sealing oil cavity 6 is formed inside the elastic deformation element 3, the piston rod 5 and the inner cavity of the oil cylinder form an integral sealing structure, and therefore hydraulic oil cannot overflow at the connection position of the piston rod 5 and the elastic deformation element 3 and the connection position of the wall of the inner cavity of the oil cylinder and the elastic deformation element 3. Convex arcs 3-3 and concave arcs 3-4 which are connected end to end are arranged between the small hole end 3-1 and the large hole end 3-5 of the elastic deformation element 3, and the convex arcs 3-3 and the right end 3-2 of the elastic deformation element are connected 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 spring steel wire 3-6 is positioned in the middle position in the wall thickness, and the spring steel wire 3-6 has certain rigidity and is formed by prepressing in a winding process. A steel skeleton 3-5 arranged in the right end 3-2 of the elastic deformation element is pre-pressed and formed by a process, and is vulcanized in the elastic deformation element 3 and is positioned in the middle of the wall thickness. During braking and relieving, the elastic deformation element 3 can axially elastically deform to extend or contract along with the movement of the piston rod 5. When braking, the elastic deformation element 3 stores the spring energy of the reset piston rod 5 due to extension, and when pressure relief is relieved, the stored energy is provided to enable the piston rod 5 to automatically reset.
Referring to fig. 3, a piston 5-2 is arranged in the middle of a piston rod 5, a boss 3-1 is arranged at a small hole end 3-1 of an 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 arranged in a sealed oil cavity 6, the piston rod 5 is in radial sealing connection with the elastic deformation element 3, meanwhile, the right end face of the piston 5-2 is in sealing connection with the boss 3-1 to form a dynamic sealing structure, hydraulic oil enters an inner cavity 6 of the elastic deformation element through an oil inlet 8 and acts on the left end face 5-4 of the piston and the left end face of the piston 5-2 to enable the elastic deformation element to axially extend and deform and stop at the right end face 2-2 of the inner cavity of the oil cylinder. When the sealed oil cavity 6 is filled with oil and slightly expands, the wall of the oil cavity 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 clearance Y generated after the wear limits of both the brake disc 10 and the brake pad 4.
Referring to fig. 3, a central hole 2-3 at the right end of the oil cylinder is in clearance fit with the piston rod 5, and plays a role in guiding 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 oil cylinders 1 are oppositely installed on the caliper body 9, one ends of piston rods 5 of the two oil cylinders 1 respectively extend out of the oil cylinders 1 and are connected with corresponding brake pads 4 through abutting portions 5-3 thereof, and the brake pads 4 are installed in a clearance with a brake disc 10. During braking, a 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, the piston rod 5 further extends out under the action of oil pressure and presses the brake pad 4, the brake pad 4 presses the brake disc 10, so that a braking effect is generated, meanwhile, the elastic deformation element 3 extends along with the further extension of the piston rod 5 to store the energy of the reset piston rod 5, when pressure relief is relieved, the elastic deformation element 3 provides stored energy to enable the piston rod 5 to automatically reset, so that the normal gap between the brake disc 10 and the brake pad 4 is ensured, and grinding particles generated by braking can be effectively discharged.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the flow chart or diagrams in the drawings are not necessarily required to practice the present invention.
The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modify equivalent embodiments using the technical content disclosed above without departing from the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (9)
1. A brake oil cylinder for rail transit 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,
an elastic sealing element (3) which can generate elastic deformation along the axial direction of the oil cylinder is accommodated in 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 (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 part with built-in spring wires (3-6).
3. The brake cylinder for rail transit according to claim 1, wherein one end of the elastic sealing element is provided with an open-shaped large hole, the other end of the elastic sealing element is provided with a small hole matched with the piston rod, the end of the large hole is hermetically connected with the wall of the inner cavity of the cylinder, and the end of the small hole is hermetically connected with the piston.
4. The brake cylinder for rail transit as claimed in claim 3, wherein a steel skeleton is provided in the small hole end.
5. The brake cylinder for rail transit according to claim 3, wherein at least one section of convex arc (3-3) and one section of 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.
6. The brake cylinder for rail transit according to claim 3, wherein a boss (3-1) is concavely arranged at the small hole end of the elastic sealing element, and the boss abuts against and is connected with the right end face of the piston in a sealing manner.
7. The brake cylinder for rail traffic of claim 1, wherein the working stroke of the elastic sealing element is greater than a clearance generated after a wear limit of a brake disc and the brake pad.
8. The brake cylinder for rail transit of claim 1, wherein the piston is disposed at 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.
9. A rail transit brake clamp unit comprises a clamp body (9), two brake cylinders and brake pads (4), wherein the two brake cylinders are oppositely arranged on the clamp body, 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 rail transit brake clamp unit is characterized in that the brake cylinders are the brake cylinders according to any one of claims 1 to 8.
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 true CN114233778A (en) | 2022-03-25 |
| CN114233778B CN114233778B (en) | 2023-08-08 |
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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 |
|---|---|
| CN114233778B (en) | 2023-08-08 |
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