CN214036613U - Large-force-increasing fast-propelling brake cylinder - Google Patents

Abstract

The utility model relates to a braking equipment technical field, concretely relates to increase power and impel checking cylinder soon greatly, include: the bidirectional motor comprises a first output shaft and a second output shaft, and the end part of the first output shaft is fixedly connected with a friction assembly; the quick-pushing mechanism is arranged on the first output shaft and comprises a trapezoidal screw rod, a pressing plate assembly and a plurality of pressing springs abutted between the pressing plate assembly and the trapezoidal screw rod, a trapezoidal nut is connected onto the trapezoidal screw rod in a threaded manner, the pressing springs are sleeved on a connecting rod, one end of the connecting rod penetrates through and extends into the trapezoidal screw rod, the other end of the connecting rod extends into the pressing plate assembly, the trapezoidal screw rod and the pressing plate assembly are both movably connected with the connecting rod, and the friction assembly is arranged between the pressing plate assembly and the trapezoidal screw rod; and the speed reducing mechanism is mounted on the second output shaft. When the brake cylinder performs braking operation, after the trapezoidal nut rotates to the position, the pressure plate assembly is separated from the friction assembly, and the torque of the bidirectional motor is applied to the braking device through the speed reducing mechanism, so that the brake cylinder can provide large braking force.

Description

Large-force-increasing fast-propelling brake cylinder

Technical Field

The utility model relates to a braking equipment technical field, concretely relates to increase power and impel checking cylinder soon greatly.

Background

When the locomotive brakes, the brake cylinder pushes a set of basic devices to perform a braking function. The electromechanical brake cylinder converts electric energy into mechanical energy through a built-in direct current torque motor, and can apply larger torque to an external basic device, so that braking is more reliable. On the premise of certain motor power, the rotating speed and the torque of the motor are in an inverse proportional relation, namely, the larger the torque provided by the motor is, the lower the rotating speed of the motor shaft is, so that the time required by braking is increased, and the longer the push-out time is, the slower the braking response is; the faster the motor shaft rotates, the less torque the motor can provide, resulting in less push-out force and less effective brake application.

In order to take account of the brake pushing speed and the brake pushing force, a brake cylinder in the prior art is respectively connected with a speed reducing device and a torque limiter at two ends of a bidirectional motor. The motor is provided with a speed reducing device, so that a larger torque can be obtained by reducing the speed of the motor, and a larger pushing force can be ensured; when the output torque of one end of the motor, which is provided with the torque limiter, exceeds the rated torque, the torque limiter limits the torque transmitted by the motor in a slipping mode so as to ensure that the motor can keep a higher rotating speed. Because the two ends of the bidirectional motor must rotate simultaneously, the brake cylinder needs to be pushed in place by the end of the motor provided with the torque limiter in the working process, the pushing part is separated from the motor, the end of the motor provided with the speed reducer is continuously decelerated to obtain larger pushing force, however, after the end of the motor provided with the torque limiter is quickly in place, the torque limiter still consumes torque, the torque which can be provided by the end provided with the speed reducer is greatly reduced, the provided braking force is still smaller, and the braking requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the moment of torsion restriction end of big reinforcement fast propulsion checking cylinder among the prior art and still having the consumption to the moment of torsion of motor after advancing to target in place fast, leads to the defect that the driving force that the checking cylinder provided reduces to a big reinforcement fast propulsion checking cylinder is provided.

In order to solve the technical problem, the utility model provides a big power boost impels checking cylinder soon, include:

the bidirectional motor comprises a first output shaft and a second output shaft, and the end part of the first output shaft is fixedly connected with a friction assembly;

the quick-pushing mechanism is arranged on the first output shaft and comprises a trapezoidal screw rod, a pressing plate assembly and a plurality of pressing springs abutted between the pressing plate assembly and the trapezoidal screw rod, a trapezoidal nut is connected onto the trapezoidal screw rod in a threaded manner, the pressing springs are sleeved on a connecting rod, one end of the connecting rod penetrates through and extends into the trapezoidal screw rod, the other end of the connecting rod extends into the pressing plate assembly, the trapezoidal screw rod and the pressing plate assembly are both movably connected with the connecting rod, and the friction assembly is arranged between the pressing plate assembly and the trapezoidal screw rod;

the quick pushing mechanism is provided with a first state that the pressing plate assembly is abutted against the friction assembly under the action of the pressing spring and a second state that the pressing plate assembly is separated from the friction assembly after overcoming the action of the pressing spring;

and the speed reducing mechanism is mounted on the second output shaft.

Optionally, the pressing plate assembly comprises a pressing plate body and an intermediate body, the intermediate body is arranged between the pressing plate body and the trapezoidal screw rod, the connecting rod and the pressing spring penetrate through the intermediate body, one surface of the intermediate body, facing the trapezoidal screw rod, is provided with a groove, the friction assembly is arranged in the groove, when the fast pushing mechanism is in the first state, the friction assembly is abutted to the intermediate body to drive the intermediate body to rotate, and when the fast pushing mechanism is in the second state, the friction assembly is separated from the intermediate body.

Optionally, the friction assembly comprises: friction ring and the baffle of mutual butt, friction ring and first output shaft key-type connection, the baffle passes through bolted connection on first output shaft, and friction ring, baffle and the coaxial setting of first output shaft.

Optionally, the thread surfaces of the trapezoidal screw rod and the trapezoidal nut are both coated with metal molybdenum layers.

Optionally, reduction gears includes the eccentric wheel of establishing from inside to outside overlapping in proper order, external gear and internal gear and install the integral key shaft on the second output shaft, integral key shaft and eccentric wheel key-type connection, one side fixedly connected with switching shaft that the eccentric wheel deviates from the integral key shaft, the one end that the switching shaft is close to the eccentric wheel is equipped with the driving disk, be equipped with a plurality of transmission holes on the driving disk, there are a plurality of transmission posts along the axial extension of external gear on the external gear, the transmission post is installed with the transmission hole one-to-one, the internal diameter in transmission hole is greater than the external diameter of transmission post, internal gear and external gear meshing, the number of teeth of internal gear is more than the number of teeth of external gear.

Optionally, a force sensor is mounted on the transfer shaft.

Optionally, the inner diameter of the drive bore is twice the outer diameter of the drive post.

Optionally, the difference in the number of teeth of the internal gear and the external gear is not greater than 4.

Optionally, an electromagnetic clutch is connected between the speed reducing mechanism and the second output shaft.

Optionally, a rotary transformer is installed between the bidirectional motor and the fast-pushing mechanism.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a big power increase advances checking cylinder soon, include: the bidirectional motor comprises a first output shaft and a second output shaft, and the end part of the first output shaft is fixedly connected with a friction assembly; the quick-pushing mechanism is arranged on the first output shaft and comprises a trapezoidal screw rod, a pressing plate assembly and a plurality of pressing springs abutted between the pressing plate assembly and the trapezoidal screw rod, a trapezoidal nut is connected onto the trapezoidal screw rod in a threaded manner, the pressing springs are sleeved on a connecting rod, one end of the connecting rod penetrates through and extends into the trapezoidal screw rod, the other end of the connecting rod extends into the pressing plate assembly, the trapezoidal screw rod and the pressing plate assembly are both movably connected with the connecting rod, and the friction assembly is arranged between the pressing plate assembly and the trapezoidal screw rod; the quick pushing mechanism is provided with a first state that the pressing plate assembly is abutted against the friction assembly under the action of the pressing spring and a second state that the pressing plate assembly is separated from the friction assembly after overcoming the action of the pressing spring; and the speed reducing mechanism is mounted on the second output shaft.

When carrying out braking operation, compression spring is precompressed by the precommpression, makes clamp plate subassembly and trapezoidal lead screw be close to the setting for friction subassembly and clamp plate subassembly butt, the motor rotate and drive the friction subassembly and rotate, and the clamp plate subassembly is worked under friction subassembly's drive, and drives the trapezoidal lead screw rotation, releases trapezoidal nut. When trapezoidal nut rotated to the position, compression spring continued the compression under trapezoidal lead screw's effect for the interval between clamp plate subassembly and the trapezoidal lead screw diminishes slightly, makes clamp plate subassembly and friction pack separation, and when reduction gears acted on the second output shaft, the moment of torsion was no longer consumed at first output shaft place end, makes on the whole external brake device that applys through reduction gears of the moment of torsion of two-way motor, guarantees that the brake jar can provide great brake force.

2. The utility model provides a big power increase impels checking cylinder soon, the clamp plate subassembly includes clamp plate body and midbody, and the midbody is located between clamp plate body and the trapezoidal lead screw, and connecting rod and pressure spring all run through the midbody, are equipped with the recess in the midbody towards the one side of trapezoidal lead screw, and in the recess was located to friction subassembly, when pushing away the mechanism soon and being in first state, friction subassembly rotated with the midbody butt, when pushing away the mechanism soon and being in the second state, friction subassembly and midbody separation. Utilize the midbody to support pressure spring for pressure spring can not take place the skew when keeping the pressure state, with the reliability that increases friction subassembly and clamp plate subassembly butt with clamp plate body and trapezoidal lead screw.

3. The utility model provides a big power increase impels checking cylinder soon, trapezoidal lead screw has the metal molybdenum layer with the equal spraying of the thread face of trapezoidal nut. The brake cylinder has the advantages that frictional resistance between the trapezoidal screw rod and the trapezoidal nut is reduced, acting force required by pushing the trapezoidal nut by the trapezoidal screw rod is reduced, force required by pushing the trapezoidal nut by the bidirectional motor is reduced, the first output shaft of the bidirectional motor can be kept at a high rotating speed, and the brake cylinder can be used for braking external brake equipment quickly in place.

4. The utility model provides a power increase advances checking cylinder soon greatly, reduction gears includes from inside to outside overlaps the eccentric wheel of establishing in proper order, external gear and internal gear and install the epaxial integral key shaft of second output, integral key shaft and eccentric wheel key-type connection, one side fixedly connected with switching shaft that the eccentric wheel deviates from the integral key shaft, the one end that the switching shaft is close to the eccentric wheel is equipped with the driving disk, be equipped with a plurality of transmission holes on the driving disk, axial extension along the external gear on the external gear has a plurality of transmission posts, transmission post and the one-to-one installation of transmission hole, the internal diameter in transmission hole is greater than the external diameter of transmission post, internal gear and external gear meshing, the number of teeth of internal gear is more than the number of teeth of external gear. The reduction mechanism adopts an involute planetary gear transmission mechanism with small tooth difference, so that the reduction and reinforcement can be realized, and the volume of the brake cylinder can be reduced, so that the brake cylinder can be used in more installation space.

5. The utility model provides a big power increase impels checking cylinder soon is connected with electromagnetic clutch between reduction gears and the second output shaft. When the brake cylinder brakes, when the bidirectional motor stops rotating, the electromagnetic clutch is not electrically combined, the electromagnetic clutch locks the second output shaft, and the bidirectional motor is powered off, so that energy consumed by the bidirectional motor can be saved.

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 embodiments or the technical solutions in the prior art will be briefly described 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 diagram of a large force-increasing fast-propelling brake cylinder according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a fast pushing mechanism provided in an embodiment of the present invention.

Fig. 3 is a schematic structural view of a reduction mechanism according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of another angle of the reduction mechanism according to the embodiment of the present invention.

Description of reference numerals: 1. a bi-directional motor; 2. a first output shaft; 3. a second output shaft; 4. a trapezoidal lead screw; 5. a compression spring; 6. a trapezoidal nut; 7. a connecting rod; 8. a pressing plate body; 9. an intermediate; 10. a friction ring; 11. a baffle plate; 12. an eccentric wheel; 13. an outer gear; 14. an internal gear; 15. a spline shaft; 16. a transfer shaft; 17. a drive plate; 18. a drive post; 19. a force sensor; 20. an electromagnetic clutch; 21. a rotary transformer; 22. a force transmission plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 4, the large force-increasing and fast-pushing brake cylinder provided for the present embodiment includes: the device comprises a force sensor 19, a speed reducing mechanism, an electromagnetic clutch 20, a bidirectional motor 1, a rotary transformer 21 and a quick-pushing mechanism which are arranged in a shell and are coaxially arranged.

The bidirectional motor 1 comprises a first output shaft 2 and a second output shaft 3, and a friction assembly is fixedly connected to the end part of the first output shaft 2. The fast push mechanism is installed at first output shaft 2, including trapezoidal lead screw 4, clamp plate subassembly and butt in a plurality of pressure spring 5 between clamp plate subassembly and trapezoidal lead screw 4, threaded connection has trapezoidal nut 6 on the trapezoidal lead screw 4. The thread surfaces of the trapezoidal screw rod 4 and the trapezoidal nut 6 are both coated with metal molybdenum layers. 5 covers of pressure spring establish on connecting rod 7, and 7 one ends of connecting rod run through extend to trapezoidal lead screw 4 in, the other end extends to the clamp plate subassembly in, trapezoidal lead screw 4 and clamp plate subassembly all with connecting rod 7 swing joint, friction pack locates between clamp plate subassembly and the trapezoidal lead screw 4. The first output shaft 2 is sleeved with a force transmission plate 22, and the force transmission plate 22 is provided with a ball thrust bearing which is pressed against the pressing plate. The quick-push mechanism has a first state that the pressing plate component is abutted against the friction component under the action of the pressing spring 5 and a second state that the pressing plate component is separated from the friction component after overcoming the action of the pressing spring 5. The pressing plate assembly comprises a pressing plate body 8 and a middle body 9, the middle body 9 is arranged between the pressing plate body 8 and the trapezoidal screw rod 4, the connecting rod 7 and the pressing spring 5 penetrate through the middle body 9, one face, facing the trapezoidal screw rod 4, of the middle body 9 is provided with a groove, the friction assembly is arranged in the groove, when the fast pushing mechanism is in the first state, the friction assembly is abutted to the middle body 9 to drive the middle body 9 to rotate, and when the fast pushing mechanism is in the second state, the friction assembly is separated from the middle body 9. The intermediate body 9 is sleeved with a needle bearing, and the needle bearing is pressed in the shell through a check ring. The friction assembly includes: friction ring 10 and baffle 11 of mutual butt, friction ring 10 and the 2 key-type connections of first output shaft, baffle 11 pass through bolted connection on first output shaft 2, and friction ring 10, baffle 11 and the coaxial setting of first output shaft 2.

The speed reduction mechanism is mounted on the second output shaft. The speed reducing mechanism comprises an eccentric wheel 12, an external gear 13, an internal gear 14 and a spline shaft 15, wherein the eccentric wheel 12, the external gear 13 and the internal gear 14 are sequentially sleeved from inside to outside, the spline shaft 15 is installed on the second output shaft 3, the spline shaft 15 is connected with the eccentric wheel 12 in a key mode, one side, away from the spline shaft 15, of the eccentric wheel 12 is fixedly connected with a transfer shaft 16, one end, close to the eccentric wheel 12, of the transfer shaft 16 is provided with a transmission disc 17, a plurality of transmission holes are formed in the transmission disc 17, a plurality of transmission columns 18 extend on the external gear 13 along the axial direction of the external gear 13, the transmission columns 18 are installed in one-to-one correspondence with the transmission holes, the inner diameters of the transmission holes are larger than the outer diameters of the transmission columns 18, and the center distances of the inner gear ring and the external gear are equal to the radius difference between the transmission holes and the transmission columns 18. In this embodiment, the inner diameter of the drive bore is twice the outer diameter of the drive post 18. Specifically, the center-to-center distance between the internal gear 14 and the external gear 13 is 1mm, the diameter of the transmission hole is 4mm, and the diameter of the transmission post 18 is 2 mm. The internal gear 14 meshes with the external gear 13, the number of teeth of the internal gear 14 is greater than that of the external gear 13, and the difference in the number of teeth between the internal gear 14 and the external gear 13 is not more than 4. In the present embodiment, the difference in the number of teeth between the internal gear 14 and the external gear 13 is 1. The force sensor 19 is mounted on the adapter shaft 16 and is used for detecting the pushing-out force provided by the brake cylinder as a whole. The reduction mechanism adopts an involute planetary gear transmission mechanism with small tooth difference, so that the reduction and reinforcement can be realized, and the volume of the brake cylinder can be reduced, so that the brake cylinder can be used in more installation space.

The electromagnetic clutch 20 is connected between the reduction mechanism and the second output shaft 3. When the brake cylinder brakes and the bidirectional motor 1 stops rotating, the electromagnetic clutch 20 is de-energized and combined, the electromagnetic clutch 20 locks the second output shaft 3, and the bidirectional motor 1 is de-energized at the moment, so that the energy consumed by the bidirectional motor 1 can be saved. A resolver 21 is installed between the bidirectional motor 1 and the fast-pushing mechanism for detecting and feeding back the position of the motor.

When carrying out braking operation, the brake cylinder is compressed at pressure spring 5, and the clamp plate body 8 and the trapezoidal lead screw 4 of clamp plate subassembly are close to the setting for friction pack's friction ring 10 and clamp plate body 8 butt of clamp plate subassembly, the motor rotate and drive friction pack and rotate, and clamp plate pack's midbody 9 works under friction pack's friction ring 10's drive, and drives trapezoidal lead screw 4 rotatory, releases trapezoidal nut 6. When trapezoidal nut 6 rotated to target in place, compression spring 5 continued the compression and made the interval between clamp plate subassembly and trapezoidal lead screw 4 diminish slightly for the midbody and the friction subassembly separation of clamp plate subassembly, when reduction gears effect and second output shaft, the moment of torsion was no longer consumed to first output shaft 2 place end, made on the whole external brake device that applys through reduction gears of moment of torsion of two-way motor, guaranteed that the brake cylinder can provide great brake force.

As an alternative embodiment, the center-to-center distance between the inner gear 14 and the outer gear 13 is 0.5mm, the diameter of the transmission hole is 3mm, and the diameter of the transmission post 18 is 2 mm.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A large force increasing fast impulse brake cylinder comprising:

the bidirectional motor (1) comprises a first output shaft (2) and a second output shaft (3), and the end part of the first output shaft (2) is fixedly connected with a friction assembly;

the quick-pushing mechanism is mounted on the first output shaft (2) and comprises a trapezoidal lead screw (4), a pressing plate assembly and a plurality of compression springs (5) abutted between the pressing plate assembly and the trapezoidal lead screw (4), a trapezoidal nut (6) is connected to the trapezoidal lead screw (4) in a threaded manner, the compression springs (5) are sleeved on a connecting rod (7), one end of the connecting rod (7) penetrates through the trapezoidal lead screw (4) and extends into the pressing plate assembly, the other end of the connecting rod extends into the pressing plate assembly, the trapezoidal lead screw (4) and the pressing plate assembly are both movably connected with the connecting rod (7), and the friction assembly is arranged between the pressing plate assembly and the trapezoidal lead screw (4);

the quick-push mechanism has a first state that the pressure plate component is abutted against the friction component under the action of the pressing spring (5) and a second state that the pressure plate component is separated from the friction component after overcoming the action of the pressing spring (5);

and a speed reduction mechanism mounted on the second output shaft.

2. The brake cylinder with large force increasing and quick pushing functions as claimed in claim 1, wherein the pressure plate assembly comprises a pressure plate body (8) and an intermediate body (9), the intermediate body (9) is arranged between the pressure plate body (8) and the trapezoidal lead screw (4), the connecting rod (7) and the compression spring (5) penetrate through the intermediate body (9), a groove is formed in one surface, facing the trapezoidal lead screw (4), of the intermediate body (9), the friction assembly is arranged in the groove, when the quick pushing mechanism is in the first state, the friction assembly is abutted to the intermediate body (9) to drive the intermediate body (9) to rotate, and when the quick pushing mechanism is in the second state, the friction assembly is separated from the intermediate body (9).

3. Large boost fast push brake cylinder according to claim 2, characterised in that the friction assembly comprises: friction ring (10) and baffle (11) that mutual butt joint, friction ring (10) with first output shaft (2) key-type connection, baffle (11) pass through bolted connection on first output shaft (2), friction ring (10), baffle (11) and first output shaft (2) coaxial setting.

4. High boost quick brake cylinder according to any of claims 1 to 3, characterized in that the thread surfaces of the trapezoidal lead screw (4) and the trapezoidal nut (6) are coated with a metal molybdenum layer.

5. The brake cylinder with large power increase and quick propulsion according to any one of claims 1 to 3, wherein the speed reducing mechanism comprises an eccentric wheel (12), an external gear (13), an internal gear (14) and a spline shaft (15) mounted on the second output shaft (3), the eccentric wheel (12), the external gear (13), the internal gear (14) and the spline shaft (15) are sequentially sleeved from inside to outside, the spline shaft (15) is in key connection with the eccentric wheel (12), a transfer shaft (16) is fixedly connected to one side of the eccentric wheel (12) away from the spline shaft (15), a transmission disc (17) is arranged at one end of the transfer shaft (16) close to the eccentric wheel (12), a plurality of transmission holes are formed in the transmission disc (17), a plurality of transmission columns (18) extend along the axial direction of the external gear (13), the transmission columns (18) are mounted in one-to-one correspondence with the transmission holes, and the inner diameters of the transmission holes are larger than the outer diameters of the transmission columns (18), the inner gear (14) is meshed with the outer gear (13), and the number of teeth of the inner gear (14) is greater than that of the outer gear (13).

6. Brake cylinder for high power and fast propulsion according to claim 5, characterised in that a force sensor (19) is mounted on the swivel axle (16).

7. Brake cylinder for high power and fast propulsion according to claim 5, characterised in that the inner diameter of the transmission hole is twice the outer diameter of the transmission post (18).

8. Big power boost fast boost brake cylinder according to claim 5, characterised in that the difference in the number of teeth of the inner (14) and outer (13) gear wheels is not more than 4.

9. High boost fast propulsion brake cylinder according to any of claims 1 to 3, characterised in that an electromagnetic clutch (20) is connected between the reduction mechanism and the second output shaft (3).

10. Big power boost quick impulse brake cylinder according to any of the claims 1 to 3, characterized in that between the bidirectional motor (1) and the quick impulse mechanism is mounted a rotary transformer (21).

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