CN211995596U - Running gear with hydraulic direct-pushing brake mechanism for coal mine explosion-proof storage battery electric locomotive - Google Patents
Running gear with hydraulic direct-pushing brake mechanism for coal mine explosion-proof storage battery electric locomotive Download PDFInfo
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- CN211995596U CN211995596U CN202020561290.8U CN202020561290U CN211995596U CN 211995596 U CN211995596 U CN 211995596U CN 202020561290 U CN202020561290 U CN 202020561290U CN 211995596 U CN211995596 U CN 211995596U
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Abstract
The invention discloses a running gear with a hydraulic direct-pushing brake mechanism for a coal mine explosion-proof storage battery electric locomotive, which comprises wheels, a motor, a connecting piece, a hydraulic cylinder and a brake piece, and is characterized in that: the wheel braking device is characterized in that the motor is a direct-drive motor, the wheels are assembled on two sides of an output shaft of the direct-drive motor, the connecting piece is connected to the direct-drive motor, the hydraulic cylinder is fixed to the connecting piece, the braking piece is connected with the hydraulic cylinder, and the hydraulic cylinder directly drives the braking piece to compress and brake or release the braking of the wheels through telescopic motion. The braking part connected with the hydraulic cylinder and the wheel are fixed in position, the friction braking joint area is large, the braking is stable, and the friction judder and the friction noise caused by the displacement deviation between the braking part and the wheel due to the shaking of the locomotive in the prior art are overcome; meanwhile, the hydraulic braking torque is large, the speed is high, and the effect is good.
Description
Technical Field
The invention relates to the technical field of explosion-proof electric locomotives for coal mines, in particular to a running gear with a hydraulic direct-pushing brake mechanism for an explosion-proof storage battery electric locomotive for a coal mine.
Background
In coal mine transportation equipment, an explosion-proof storage battery electric locomotive is the main equipment for coal mine transportation in China at present and is mainly used for hauling a mine car group, transporting minerals, equipment and personnel. In a coal mine environment, the working environment is complex, air is moist, the space of a roadway is small, the running track of a locomotive is narrow, so that the overall dimension of the electric locomotive is small, parts such as an anti-explosion electric control part, a walking driving part, a braking part, a sand scattering part and the like which are necessary for the locomotive are required to be arranged in a box body with limited space, the locomotive is crowded, driving operation is uncomfortable, maintenance is inconvenient, and the improvement of the braking performance of the electric locomotive are very difficult under the condition of crowding in the existing locomotive.
At present, the braking modes commonly used in explosion-proof electric locomotives for coal mines are roughly divided into three types: mechanical braking, electrical braking, air braking. Although each of the three braking methods has advantages, in practical use, there are many disadvantages.
The mechanical brake is that the hand wheel rotates to drive the force-dividing arm, the connecting rod, the transmission rod, the adjusting screw and the like to transmit the brake force to the brake block, so that the brake block presses the friction wheel to achieve the brake effect. This braking mode: 1. the transmission parts are more, the structure is complex and heavy, and corresponding fault points are more; 2. the idle stroke distance is large, the hand wheel needs to rotate 2-3 circles to brake, the braking reaction is slow, the braking distance is long, and the braking efficiency is low; 3. the labor intensity of manual operation is high, the work is hard, and the braking force is too soft, so that the braking torque is small; 4. the mechanical transmission synchronism is poor, the corresponding brake blocks on the two sides need to be adjusted repeatedly, the friction is not uniform, the brake is unbalanced, the brake effect and reliability are poor, and the phenomena of friction shake, friction noise and the like can occur; 5. a braking hand wheel needs to be arranged in the cab, so that the cab space is occupied, and the driving comfort is reduced; 6. can only be used in low-speed running of the locomotive and can not meet the requirement of emergency braking of the locomotive. The mode has low reliability in actual use and has great potential safety hazard.
The electric brake is a brake that generates a braking force by electric control of the motor. The mode needs to be connected with a power supply, can only be used as normal braking during the operation of the locomotive, and needs other braking modes to be matched for use during emergency braking, otherwise, the emergency braking effect is poor, and the motor is greatly damaged; when an electric fault occurs in the running of the electric locomotive, the electric brake fails; the parking brake cannot be provided when the vehicle is parked because there is no power supply.
The air brake is that a special motor drives an air compressor to supply air to an air cylinder, and the air cylinder drives a brake block to perform friction brake with wheels. The mode has large noise, high cost, large volume and high assembly requirement; the device is easy to damage in use, needs frequent maintenance and repair, and wastes a large amount of manpower and material resources; the braking is not stable, the braking torque is not controllable, and the brake can not be normally used under ordinary conditions.
Because of the restriction in the aspect of the space structure in the electrified locomotive and electrical control, hydraulic braking uses less in mining electric locomotive especially coal mine electric locomotive, and the hydraulic braking who uses in current coal mine locomotive has: 1. the structure adopts a manual or pedal mode, so that the operation is labor-consuming, sufficient brake oil is not available, the braking force is small, the braking speed is low, and the structure can only be applied to electric locomotives with small tonnage, such as 2.5T and the like; 2. the hydraulic cylinder is utilized to drive the friction plate to clamp and assemble the brake disc on the wheel shaft of the locomotive, the structure only exists in the prior theoretical technology, the installation space of the brake disc and the hydraulic cylinder is narrow and small due to the limitation of the space and the position in the locomotive in actual use, and the mode is basically in an unrealizable state.
Disclosure of Invention
To the problem that exists among the prior art, this patent discloses a colliery explosion-proof battery electric locomotive is with taking hydraulic pressure straight running gear who pushes away arrestment mechanism, fixed position between the braking piece that the pneumatic cylinder is connected and the wheel, the braking is steady, and the friction laminating area is big, braking moment is big, fast, effectual, long service life.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: the utility model provides a colliery explosion-proof battery electric locomotive is with taking hydraulic pressure to push away running gear of arrestment mechanism directly, includes wheel 1, motor, connecting piece 5, pneumatic cylinder 4, braking piece 3, its characterized in that: the wheel braking device is characterized in that the motor is a direct-drive motor 21, the wheel 1 is assembled on two sides of an output shaft of the direct-drive motor 21, the connecting piece 5 is connected to the direct-drive motor 21, the hydraulic cylinder 4 is fixed to the connecting piece 5, the braking piece 3 is connected with the hydraulic cylinder 4, and the hydraulic cylinder 4 directly drives the braking piece 3 to compress and brake or brake the wheel 1 through telescopic action. The housing of the direct drive motor 21 and the connecting piece 5 can be manufactured into an integral structure through integral processing, or can be assembled into an integral fixed structure after being processed respectively.
Another aspect of the invention: colliery explosion-proof battery electric locomotive is with taking hydraulic pressure to push away running gear of arrestment mechanism directly, including wheel pair 8, motor, connecting piece 5, pneumatic cylinder 4, braking piece 3, its characterized in that: the electric motor is a primary transmission electric motor 22, the primary transmission electric motor 22 is assembled on a wheel shaft of the wheel pair 8, the connecting piece 2 is connected to the primary transmission electric motor 22, the hydraulic cylinder 4 is fixed on the connecting piece 5, the braking piece 3 is connected with the hydraulic cylinder 4, and the hydraulic cylinder 4 directly drives the braking piece 3 to compress and brake or release the brake of the wheels of the wheel pair 8 through telescopic motion. The housing of the primary drive motor 22 and the connecting member 5 may be integrally manufactured as an integral structure, or may be separately manufactured and then assembled as an integral fixed structure.
The running gear with the hydraulic direct-pushing brake mechanism for the coal mine explosion-proof storage battery electric locomotive is characterized in that: the hydraulic cylinder 4 is of a pressure liquid driving structure, when liquid pressure in each cavity in the hydraulic cylinder is different, the hydraulic cylinder is driven by the pressure liquid to stretch and retract, and the hydraulic cylinder drives the braking piece to compress and brake or release braking of the wheel.
Or, the hydraulic cylinder 4 is of a spring release retraction structure, the spring is arranged in a rod cavity of the hydraulic cylinder, when pressure liquid is conveyed into a rodless cavity of the hydraulic cylinder, a piston rod of the hydraulic cylinder extends out, the spring in the rod cavity is compressed, and the hydraulic cylinder drives the braking part to compress and brake the wheels; when the liquid pressure in the rodless cavity of the hydraulic cylinder is unloaded, the spring compressed in the rod cavity releases the elastic force to enable the piston rod of the hydraulic cylinder to retract, and the hydraulic cylinder drives the braking piece to be separated from the wheel to release braking.
Or, the hydraulic cylinder 4 is of a spring release extension structure, the spring is arranged in a rodless cavity of the hydraulic cylinder or on a piston rod outside the hydraulic cylinder, when pressure liquid is conveyed into a rod cavity of the hydraulic cylinder, the piston rod of the hydraulic cylinder retracts, the spring in the rodless cavity or the spring on a piston rod outside the cylinder body is compressed, and the hydraulic cylinder drives the braking part to be separated from the wheel to release braking; when the liquid pressure in the rod cavity of the hydraulic cylinder is unloaded, the compressed spring in the rodless cavity or on the piston rod outside the cylinder body releases the elastic force to extend the piston rod of the hydraulic cylinder, and the hydraulic cylinder drives the braking part to compress and brake the wheel.
Has the advantages that:
1. the hydraulic cylinder is arranged on the connecting piece of the direct drive motor, the position between the braking part connected with the hydraulic cylinder and the wheel is fixed, the braking is stable, the friction fit area is large, the braking effect is good, the service life is long, and the position deviation between the braking part and the wheel caused by the shaking of the locomotive in the operation process, and the friction shake and the friction noise between the braking part and the wheel are overcome.
2. The device has the advantages of small idle stroke distance between the braking part and the wheels, high hydraulic braking reaction speed, large braking torque, short distance and high reliability, can realize emergency braking during driving, and reduces the accident rate of industrial accidents caused by unreliable braking and potential safety hazards caused by the unreliable braking.
3. The device directly drives the braking part to act for the hydraulic cylinder, has simple and compact structure, small volume and convenient assembly and maintenance, can save the existing mechanical hand wheel braking mechanism, and has low operation strength and high driving comfort.
4. The hydraulic cylinder in the device can realize self-balance and synchronous braking of wheel braking, the braking force is average, and the phenomenon of partial braking cannot be caused.
5. The device can keep constant liquid pressure through a hydraulic cylinder to drive a braking part to press and brake wheels all the time, so that parking braking of the locomotive is realized; the braking part can be driven by the elastic force released by the spring to press and brake the wheel all the time so as to realize parking braking when the locomotive is parked, and the safety and the reliability are high.
Drawings
FIG. 1 is a schematic structural diagram of a running gear with a hydraulic direct-pushing brake mechanism for an explosion-proof storage battery electric locomotive for a coal mine in embodiment 1.
FIG. 2 is an overall structure diagram of a coal mine explosion-proof storage battery electric locomotive comprising a running gear of the hydraulic direct-push braking mechanism in the embodiment 1 (wherein, FIG. 2.1 is a same-direction direct-push braking structure, FIG. 2.2 is a reverse direct-push braking structure on two sides, and FIG. 2.3 is a middle reverse direct-push braking structure).
FIG. 3 is a schematic structural diagram of the hydraulic cylinder of embodiment 1 (wherein, FIG. 3.1 is a hydraulic cylinder structure with an internal spring, and FIG. 3.2 is a hydraulic cylinder structure with an external spring).
FIG. 4 is a schematic structural diagram of a running gear with a hydraulic direct-pushing brake mechanism for the coal mine explosion-proof storage battery electric locomotive in embodiment 2.
FIG. 5 is an overall structure diagram of an anti-explosion battery electric locomotive for a coal mine, which comprises a running gear of a hydraulic direct-pushing brake mechanism in embodiment 2.
In the figure, 1 is a wheel; 21 is a direct drive motor; 22 is a primary transmission motor; 3 is a braking part; 4 is a hydraulic cylinder; 5 is a connecting piece; 6 is a bearing seat; 7 is a locomotive box body; and 8 is a wheel pair.
Detailed Description
The technical solution of the present invention is further described by the following embodiments with reference to the accompanying drawings.
Example 1:
as shown in FIG. 1, the embodiment 1 is a structural schematic diagram of a running gear with a hydraulic direct-pushing brake mechanism for a coal mine explosion-proof storage battery electric locomotive. The running gear with the hydraulic direct-pushing brake mechanism for the coal mine explosion-proof storage battery electric locomotive in the embodiment 1 comprises wheels 1, an electric motor, a connecting piece 5, a hydraulic cylinder 4 and a brake piece 3, wherein the electric motor is a direct-drive electric motor 21, the wheels 1 are assembled on two sides of an output shaft of the direct-drive electric motor 21, the connecting piece 3 is connected to a shell of the direct-drive electric motor 21, the hydraulic cylinder 4 is fixed on the connecting piece 5, and the brake piece 3 is connected with a piston rod of the hydraulic cylinder.
The hydraulic cylinder of the embodiment 1 directly drives the braking part to compress and brake or release the brake to the wheel through the telescopic action of the piston rod.
As shown in FIG. 2, the overall structure of the anti-explosion battery electric locomotive for coal mine including the running gear of the hydraulic direct-push brake mechanism of the embodiment 1 is shown. The electric motor is a direct-drive transmission motor 21, the wheel 1 is assembled on two sides of an output shaft of the direct-drive motor 21, the bearing seat 6 is assembled on an output shaft of the direct-drive motor 2 on the outer side of the wheel 1, the bearing seat 6 and the direct-drive motor 21 are assembled and then assembled on a locomotive box 7, the connecting piece 5 is connected to a shell of the direct-drive motor 21, the hydraulic cylinder 4 is fixed on the connecting piece 5, the braking piece is connected with a piston rod of the hydraulic cylinder 4, and the hydraulic cylinder 4 directly drives the braking piece to compress the wheel or release braking through the telescopic.
Wherein: FIG. 2.1 shows that the hydraulic cylinder is connected with a braking part and arranged on a connecting plate on the same side of the direct drive motor, and wheels are pressed and braked in the same direction; FIG. 2.2 shows that the hydraulic cylinder is connected with braking parts and arranged on connecting plates on two sides of a direct drive motor, and wheels are compressed and braked reversely; and 2.3, hydraulic cylinder connection braking parts are arranged on two connecting plates between the direct drive motors to reversely compress and brake the wheels.
The housing and the connecting piece of the direct drive transmission motor in the embodiment 1 can be manufactured into an integral structure through integral processing, and can also be assembled into an integral fixed structure after being respectively processed, for example: the connecting piece can be welded or cast on the direct drive motor shell to be integrally processed, or the connecting piece and the direct drive motor shell are respectively processed and then fixed on the direct drive motor shell by bolts.
The hydraulic cylinder in the braking mechanism of the embodiment can drive the braking part to realize the braking function by using the following modes:
The mode 2 is a spring release retraction structure, a spring is arranged in a rod cavity of a hydraulic cylinder, when pressure liquid is conveyed into a rodless cavity of the hydraulic cylinder, a piston rod of the hydraulic cylinder extends out, the spring in the rod cavity is compressed, the piston rod of the hydraulic cylinder drives a braking piece to compress and brake wheels, and the running gear stops running; when the liquid pressure in the rodless cavity of the hydraulic cylinder is unloaded, the spring compressed in the rod cavity releases the elastic force to enable the piston rod of the hydraulic cylinder to retract, the piston rod of the hydraulic cylinder drives the braking piece to be separated from the wheels to release braking, and the traveling device can operate.
The mode 3 is a spring release extension structure, a spring is arranged in a rodless cavity of a hydraulic cylinder or on a piston rod outside the hydraulic cylinder, when pressure liquid is conveyed into a rod cavity of the hydraulic cylinder, the piston rod of the hydraulic cylinder retracts, the spring in the rodless cavity or on a piston rod outside the cylinder body is compressed, the piston rod of the hydraulic cylinder drives a braking part to be separated from a wheel to release braking, and the traveling device can operate; when the pressure of the liquid in the rod cavity of the hydraulic cylinder is unloaded, the compressed spring in the rodless cavity or on the piston rod outside the cylinder releases elastic force to enable the piston rod of the hydraulic cylinder to extend out, the piston rod of the hydraulic cylinder drives the braking piece to compress and brake the wheels, and the running device stops running.
The mode 3 is a preferable scheme of the hydraulic cylinder of the embodiment, and fig. 3.1 shows a hydraulic cylinder structure with a built-in spring; fig. 3.2 shows a hydraulic cylinder structure with an external spring.
On the same principle, the hydraulic cylinder can be provided with a tension spring structure, the function of spring release retraction and the function of spring release extension can be realized, and a piston rod of the hydraulic cylinder can drive a braking piece to compress and brake or release braking on a wheel.
In the parking brake mode of the embodiment 1, the braking part is driven to always press and brake the wheels by keeping constant liquid pressure through the hydraulic cylinder, so that the parking brake of the locomotive is realized; the braking part can be driven to always press and brake the wheels through the elastic force released by the spring inside or outside the hydraulic cylinder, so that the parking brake of the locomotive is realized when the locomotive is parked, and the mechanical brake mode adopting the spring release is higher in safety and reliability.
Example 2:
as shown in fig. 4, the running gear with the hydraulic direct-pushing brake mechanism for the coal mine explosion-proof storage battery electric locomotive in embodiment 2 is schematically shown in structure. The running gear with the hydraulic direct-pushing brake mechanism for the coal mine explosion-proof storage battery electric locomotive in the embodiment 2 comprises a wheel set 8, an electric motor, a connecting piece 5, a hydraulic cylinder 4 and a brake piece 3, wherein the electric motor is a primary transmission electric motor 22, the primary transmission electric motor 22 is assembled in the middle of a wheel shaft of the wheel set 8, the connecting piece 5 is connected to a shell of the primary transmission electric motor 22, the hydraulic cylinder 4 is fixed on the connecting piece 5, and the brake piece 3 is connected with a piston rod of the hydraulic cylinder 4.
The hydraulic cylinder 4 of this embodiment 2 directly drives the braking member 3 to compress and brake or release the brake of the wheels of the wheel set 8 through the telescopic action of the piston rod.
As shown in FIG. 5, the whole structure of the anti-explosion battery electric locomotive for coal mine including the running gear of the hydraulic direct-push brake mechanism of the embodiment 2. The motor is a primary transmission motor 22, the primary transmission motor 22 is assembled in the middle of a wheel shaft of the wheel pair 8, the bearing seats 6 are assembled at two ends of the wheel shaft of the wheel pair 8, the primary transmission motor 22, the bearing seats 6 and the wheel pair 8 are assembled and then assembled on a locomotive box body 7, the connecting piece 5 is connected to a shell of the primary transmission motor 22, the hydraulic cylinder 4 is fixed on the connecting piece 5, and the braking piece 3 is connected with a piston rod of the hydraulic cylinder 4. The hydraulic cylinder 4 directly drives the braking part to compress and brake or release the brake to the wheel through the telescopic action of the piston rod.
The housing and the connecting member 5 of the primary transmission motor 22 of the embodiment 2 can be manufactured as an integral structure by integral processing, or can be assembled as an integral fixed structure after being processed respectively, for example: the connecting piece can be welded or cast on the shell of the primary transmission motor to be integrally processed, or the connecting piece and the shell of the primary transmission motor are respectively processed and then fixed on the shell of the primary transmission motor by bolts.
The hydraulic cylinder in the braking mechanism of the embodiment can drive the braking part to realize the braking function by using the following modes:
The mode 2 is a spring release retraction structure, a spring is arranged in a rod cavity of a hydraulic cylinder, when pressure liquid is conveyed into a rodless cavity of the hydraulic cylinder, a piston rod of the hydraulic cylinder extends out, the spring in the rod cavity is compressed, the piston rod of the hydraulic cylinder drives a braking piece to compress and brake wheels of a wheel pair, and a traveling device stops running; when the liquid pressure in the rodless cavity of the hydraulic cylinder is unloaded, the spring compressed in the rod cavity releases the elastic force to enable the piston rod of the hydraulic cylinder to retract, the piston rod of the hydraulic cylinder drives the braking piece to be separated from the wheel of the wheel pair to release braking, and the traveling device can operate.
The mode 3 is a spring release extension structure, a spring is arranged in a rodless cavity of a hydraulic cylinder or on a piston rod outside the hydraulic cylinder, when pressure liquid is conveyed into a rod cavity of the hydraulic cylinder, the piston rod of the hydraulic cylinder retracts, the spring in the rodless cavity or the spring on a piston rod outside the cylinder body is compressed, the piston rod of the hydraulic cylinder drives a braking piece to be separated from wheels of a wheel pair to release braking, and the traveling device can operate; when the pressure of the liquid in the rod cavity of the hydraulic cylinder is unloaded, the compressed spring in the rodless cavity or on the piston rod outside the cylinder releases elastic force to enable the piston rod of the hydraulic cylinder to extend out, the piston rod of the hydraulic cylinder drives the braking piece to compress and brake the wheels of the wheel pair, and the running device stops running.
The mode 3 is a preferable scheme of the hydraulic cylinder of the embodiment, and fig. 3.1 shows a hydraulic cylinder structure with a built-in spring; fig. 3.2 shows a hydraulic cylinder structure with an external spring.
On the same principle, the hydraulic cylinder can be provided with a tension spring structure, the spring releasing and retracting function and the spring releasing and extending function can be realized, and a piston rod of the hydraulic cylinder can drive a braking piece to compress and brake wheels of the wheel pair or release the braking.
In the parking braking mode of the embodiment 2, the braking member is driven to always press and brake the wheels of the wheel pair by keeping constant liquid pressure through the hydraulic cylinder, so that the parking braking of the locomotive is realized; the braking part can be driven to always press and brake the wheels of the wheel pair through the elastic force released by the spring inside or outside the hydraulic cylinder, so that the parking brake of the locomotive is realized when the locomotive is parked.
The above-mentioned embodiments are merely illustrative of the present invention, and not restrictive, and it should be understood that various changes and modifications in the spirit and scope of the invention may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. The utility model provides a colliery explosion-proof battery electric locomotive is with taking hydraulic pressure to push away running gear of arrestment mechanism directly, includes wheel (1), motor, connecting piece (5), pneumatic cylinder (4), braking piece (3), its characterized in that: the electric motor is a direct drive motor (21), the wheel (1) is assembled on two sides of an output shaft of the direct drive motor (21), the connecting piece (5) is connected to the direct drive motor (21), the hydraulic cylinder (4) is fixed to the connecting piece (5), the braking piece (3) is connected with the hydraulic cylinder (4), and the hydraulic cylinder (4) directly drives the braking piece (3) to compress the wheel (1) for braking or release braking through telescopic motion.
2. The running gear with the hydraulic direct-pushing brake mechanism for the coal mine explosion-proof storage battery electric locomotive according to claim 1, is characterized in that: the shell of the direct drive motor (21) and the connecting piece (5) can be manufactured into an integral structure through integral processing, and can also be assembled into an integral fixed structure after being processed respectively.
3. The utility model provides a colliery explosion-proof battery electric locomotive is with taking hydraulic pressure to push away running gear of arrestment mechanism directly, includes wheel pair (8), motor, connecting piece (5), pneumatic cylinder (4), braking piece (3), its characterized in that: the wheel pair braking device is characterized in that the motor is a primary transmission motor (22), the primary transmission motor (22) is assembled on a wheel shaft of the wheel pair (8), the connecting piece (5) is connected to the primary transmission motor (22), the hydraulic cylinder (4) is fixed to the connecting piece (5), the braking piece (3) is connected with the hydraulic cylinder (4), and the hydraulic cylinder (4) directly drives the braking piece (3) to compress and brake or brake the wheels of the wheel pair (8) through telescopic motion.
4. The running gear with the hydraulic direct-pushing brake mechanism for the coal mine explosion-proof storage battery electric locomotive according to claim 3, is characterized in that: the shell of the primary transmission motor (22) and the connecting piece (5) can be integrally machined and manufactured into an integral structure, and can also be respectively machined and then assembled into an integral fixed structure.
5. The running gear with the hydraulic direct-push brake mechanism for the coal mine explosion-proof storage battery electric locomotive according to one of the claims 1 to 4, characterized in that: the hydraulic cylinder (4) is of a pressure liquid driving structure, when liquid pressure of each cavity in the hydraulic cylinder is different, the hydraulic cylinder is driven by the pressure liquid to stretch and retract, and the hydraulic cylinder drives the braking piece to compress and brake or release braking of the wheel.
6. The running gear with the hydraulic direct-push brake mechanism for the coal mine explosion-proof storage battery electric locomotive according to one of the claims 1 to 4, characterized in that: the hydraulic cylinder (4) is of a spring release retraction structure, the spring is arranged in a rod cavity of the hydraulic cylinder, when pressure liquid is conveyed into a rodless cavity of the hydraulic cylinder, a piston rod of the hydraulic cylinder extends out, the spring in the rod cavity is compressed, and the hydraulic cylinder drives the braking piece to compress and brake the wheels; when the liquid pressure in the rodless cavity of the hydraulic cylinder is unloaded, the spring compressed in the rod cavity releases the elastic force to enable the piston rod of the hydraulic cylinder to retract, and the hydraulic cylinder drives the braking piece to be separated from the wheel to release braking.
7. The running gear with the hydraulic direct-push brake mechanism for the coal mine explosion-proof storage battery electric locomotive according to one of the claims 1 to 4, characterized in that: the hydraulic cylinder (4) is of a spring release extension structure, the spring is arranged in a rodless cavity of the hydraulic cylinder or on a piston rod outside the hydraulic cylinder, when pressure liquid is conveyed into a rod cavity of the hydraulic cylinder, the piston rod of the hydraulic cylinder retracts, the spring in the rodless cavity or the spring on a piston rod outside the cylinder body is compressed, and the hydraulic cylinder drives the braking part to be separated from the wheel to release braking; when the liquid pressure in the rod cavity of the hydraulic cylinder is unloaded, the compressed spring in the rodless cavity or on the piston rod outside the cylinder body releases the elastic force to extend the piston rod of the hydraulic cylinder, and the hydraulic cylinder drives the braking part to compress and brake the wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020561290.8U CN211995596U (en) | 2020-04-14 | 2020-04-14 | Running gear with hydraulic direct-pushing brake mechanism for coal mine explosion-proof storage battery electric locomotive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020561290.8U CN211995596U (en) | 2020-04-14 | 2020-04-14 | Running gear with hydraulic direct-pushing brake mechanism for coal mine explosion-proof storage battery electric locomotive |
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| CN211995596U true CN211995596U (en) | 2020-11-24 |
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| CN202020561290.8U Active CN211995596U (en) | 2020-04-14 | 2020-04-14 | Running gear with hydraulic direct-pushing brake mechanism for coal mine explosion-proof storage battery electric locomotive |
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