CN218352342U - Brake cylinder device for electromechanical braking - Google Patents

Abstract

The utility model discloses a brake cylinder device for electromechanical braking, an electromechanical brake cylinder device includes motor element, roller lead screw, pressure sensor, rotary transformer and loses electric brake and constitutes, motor element's stator fix on motor housing, the rotor passes through the bolt and links to each other with the axle sleeve, the axle sleeve passes through first flat key connection with the screw rod of roller lead screw simultaneously, axle sleeve rear end links to each other with rotary transformer, it links to each other with the screw rod to lose electric brake through the second flat key, the nut part of roller lead screw passes through bolted connection installation pole, at roller lead screw nut rear end through thrust ball bearing conduction power to pressure sensor; compared with the prior art, the utility model, adopt roller screw, improved electromechanical brake jar's life and security effectively to it is leading with pressure sensor, make the collection of power also more accurate.

Description

Brake cylinder device for electromechanical braking

Technical Field

The utility model relates to a rail train technical field is a brake cylinder device for electromechanical braking particularly.

Background

At present, friction braking is mainly adopted for rail train braking, wherein disc braking, brake shoe braking and the like are mainly adopted, braking force mainly comes from compressed air or hydraulic oil, however, the composition of an air braking system and a hydraulic braking system is complex, parts are more, the volume and the weight are overlarge, the response time is longer, the control precision is not high, and in addition, the risk of oil leakage and air leakage also exists.

In view of the above technical problems, those skilled in the art have made relevant studies, for example, an electromechanical brake cylinder disclosed in chinese utility model publication No. CN 209852286U, wherein the connecting member is fixedly connected to the nut, the inner side of the nut is in threaded engagement with the ball screw, one end of the ball screw, which is far away from the nut, is fixedly connected to the spline shaft, the outer side of the ball screw is further sleeved with a motor rotor, the outer side of the spline shaft is sleeved with a rotating transformer rotor, the housing is correspondingly and fixedly provided with the motor rotor engaged with the motor stator and the rotating transformer stator engaged with the rotating transformer rotor, the outer side of the spline shaft is sleeved with a force-transmitting plate, the rear end of the force-transmitting plate is connected to a power-off brake, and the inner ring of the power-off brake is sleeved on the outer side of the spline shaft; the electromechanical brake cylinder can effectively solve the problems of an air brake system and a hydraulic brake system, but has the problems of non-durability of a ball screw, inaccurate force collection and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve prior art not enough, provide a brake jar device for electromechanical braking.

In order to achieve the purpose, the brake cylinder device for electromechanical braking is designed to be composed of a motor assembly, a transmission assembly, a pressure sensor, a rotary transformer and a power-off brake, wherein a stator of the motor assembly is fixed on a motor shell, a rotor is connected with a shaft sleeve through a bolt, the shaft sleeve is connected with a screw rod of a roller screw through a first flat key, the rear end of the shaft sleeve is connected with the rotary transformer, the rotary transformer rotates along with the rotor and the screw rod, the power-off brake is connected with the screw rod through a second flat key, a nut part of the roller screw rod is connected with a mounting rod through a bolt, the circumferential positioning of the rotary transformer is realized through a protrusion on the rotary transformer rotor, a groove is formed in the shaft sleeve in a matched mode, the axial positioning is limited through a shaft clamp spring, and the rear end of the roller screw nut is used for transmitting force to the pressure sensor through a thrust ball bearing.

The utility model discloses still include following preferred technical scheme:

preferably, motor housing includes motor left side shell and motor right side shell, motor left side shell passes through bolt and motor right side shell integral connection, and the cylinder body passes through the end cover and encapsulates with the rear end cap.

Preferably, the shaft sleeve is provided with a multistage step structure, the first step is connected with the rotor through a bolt, the third step is connected with the crossed roller bearing, the last step is connected with the deep groove ball bearing, the left end of the power-off brake is fixed on the fixing plate through a bolt, and the fixing plate is fixedly connected with the right motor shell through a bolt.

Preferably, the mounting rod comprises a straight section and a transverse section arranged at two ends of the straight section towards the same side of the straight section, a mounting hole is formed in the transverse section and used for being connected with an external device, and a threaded hole is formed in the middle of the straight section and used for being connected with the roller screw nut.

Preferably, the protruding section of the roller screw nut and the end cover are sealed through a first O-shaped ring, and the front end of the roller screw nut and the end cover are sealed through a framework oil seal.

Preferably, the roller screw can be a planetary roller screw.

Compared with the prior art, the utility model, its advantage lies in:

1. the utility model discloses a roller screw, under the same specification, its fatigue life and bear dynamic load ability and all be superior to ball screw, improved electromechanical brake jar's life and security effectively.

2. The utility model discloses with pressure sensor fore-set, need pass through complicated power conduction process before having saved, can directly transmit power to sensor through thrust ball bearing for the collection of power is more accurate.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partial cross-sectional view of the present invention.

In the figure: 1. the motor 2, the motor left shell 3, the motor right shell 4, the shaft outer sleeve 5, the roller screw rod 6, the rotary transformer 7, the crossed roller bearing 8, the power-off brake 9, the fixing plate 10, the deep groove ball bearing 11, the thrust ball bearing 12, the end cover 13, the rear end cover 14, the mounting rod 15, the pressure sensor 16, the first flat key 17, the second flat key 18, the first O-shaped ring 19, the framework oil seal 20, the round nut 21, the socket 22, the second O-shaped ring 23 and the third O-shaped ring.

Detailed Description

Referring to fig. 1 and 2, the specific installation on the structure is as follows:

the installation rod 14 includes that a straight section and straight section both ends are equipped with the horizontal segment to the homonymy of straight section, it is used for being connected with external device to have seted up the mounting hole on the horizontal segment, straight section is equipped with the screw hole at the middle part, be used for being connected with roller screw 5 nut, the end cover 12 of cylinder body is equipped with the bulge section, roller screw 5 nut front end seals through skeleton oil blanket 19 with end cover 12, the inside and roller screw 5 screw rod of roller screw 5 nut mutually supports, the screw rod forms the rotation under the motor action, it carries out the translation to drive the nut simultaneously, stretch out to end cover 12 outside along the axial, end cover 12 and rear end cap 13 all are on motor left side shell 2 and motor right side shell 3 through inside and outside threaded connection.

The roller screw 5 is provided with a first flat key 16 and a second flat key 17 for connecting with the shaft outer sleeve 4 and the power-off brake 8, and a round nut 20 is arranged behind the last step of the shaft outer sleeve 4, so that the axial displacement of the shaft outer sleeve 4 is limited, and the pre-tightening effect on the pressure sensor 15 is achieved.

The shaft outer sleeve 4 is of a multi-stage step structure, the first-stage step is connected with a motor rotor through bolts, the third-stage step is connected with the crossed roller bearing 7, a bulge is arranged on a rotor of the rotary transformer 6, a groove is formed in the shaft outer sleeve 4, circumferential fixing is achieved through cooperation of the two steps, axial movement of the rotor of the rotary transformer 6 is limited by the aid of a shaft snap spring, a stator of the rotary transformer 6 is fixed on a right motor shell 3 through screws, the last-stage step of the shaft outer sleeve 4 is connected with the deep groove ball bearing 10, and the deep groove ball bearing 10 is fixedly connected with the fixing plate 9.

The power-off brake 8 is connected with a screw rod of the roller screw 5 through a second flat key 17, a third O-shaped ring 23 is adopted at the threaded connection part of the end cover 12, the rear end cover 13, the left motor shell 2 and the right motor shell 3 for sealing treatment, and meanwhile, a second O-shaped ring 22 is also arranged at the connection part of the roller screw nut and the mounting rod 14.

On the casing of motor left side shell 2 and motor right side shell 3, be provided with socket 21 to connect electrical equipment and accomplish the control to motor 1 and for resolver 6 power supply etc, socket 21 passes through cross recess pan head screw fixation on motor left side shell 2 and motor right side shell 3, is equipped with the clamp mounting hole on the casing of motor right side shell 3 equally and uses the copper sheathing parcel at downthehole portion, with the installation electromechanical braking clamp.

The roller screw 5 can adopt a planetary roller screw, the service life of the roller screw can exceed that of the ball screw by 4-5 times under the same specification, and the roller screw 5 is more suitable for being used in a heavy-load environment.

Referring to fig. 1, the utility model discloses electromechanical braking is with checking cylinder during operation, it is electrified to lose electric brake 8, motor stator is electrified, make motor rotor rotatory, and then drive axle sleeve 4, 5 screw rods of roller lead screw, 6 rotors of rotary transformer and lose electric brake 8 and rotate, 5 nut pairs of roller lead screw become the translation to rotating, thereby realize the flexible of checking cylinder, at this in-process, rotary transformer 6 measures the angle data of motor 1 and feeds back the signal to the controller of motor, thereby control motor 1 makes the size of 5 flexible distances of roller lead screw.

Referring to fig. 1, the utility model discloses when electromechanical braking was with the checking cylinder outage, the power-off brake 8 also cut off the power supply simultaneously, made roller screw 5 screw rod fix at current position for the checking cylinder keeps current operating condition.

Referring to FIG. 1, the steps for the braking mode and the release mode are as follows:

in a braking mode, the brake cylinder roller screw 5 nut extends outwards, and the reaction force of the push-out force is transmitted to the pressure sensor 15 through the thrust ball bearing 11.

Under the relieving condition, the roller screw 5 of the brake cylinder moves inwards, and the rotation of the motor 1 is detected through the rotary transformer 6.

The utility model discloses a checking cylinder compact structure, light in weight, good, the braking of protection are efficient, and its built-in structure can adapt to complicated operational environment.

The above, only for the concrete implementation of this utility model, but the scope of protection of the utility model is not limited to this, and any person skilled in this technical field is in the technical scope of the utility model discloses, according to the technical scheme and the novel conception of the utility model in addition to equal replacement or change, all should be covered within the scope of protection of the utility model.

Claims (6)

1. The utility model provides a brake cylinder device for electromechanical braking, including motor element, transmission assembly, pressure sensor, rotary transformer, lose electric brake, its characterized in that motor element's stator is fixed on motor housing, the rotor passes through the bolt and links to each other with the axle sleeve, the axle sleeve passes through first flat key-type connection with roller screw's screw rod simultaneously, axle sleeve rear end links to each other with rotary transformer, rotary transformer is along with the rotor, the screw rod rotates together, it links to each other with the screw rod to lose electric brake through the second flat key, roller screw's nut part passes through bolted connection installation pole, rotary transformer circumferential location has a protrusion on through rotary transformer rotor, the epaxial groove fit that has realizes on the axle sleeve, axial positioning is through the restriction of axle with the jump ring, pass through thrust ball bearing conduction to pressure sensor at roller screw nut rear end.

2. The brake cylinder device for electromechanical braking according to claim 1, wherein the motor case includes a left motor case and a right motor case, the left motor case is integrally connected to the right motor case by bolts, and the cylinder block is enclosed by an end cap and a rear end cap.

3. A brake cylinder device for electromechanical braking as claimed in claim 1 or 2, wherein said axle housing is provided with a multi-step structure, the first step is connected to the rotor by means of bolts, the third step is connected to the crossed roller bearing, the last step is connected to the deep groove ball bearing, and the left end of the power-off brake is fixed to the fixing plate by means of bolts, and the fixing plate is fixedly connected to the right housing of the motor by means of bolts.

4. The brake cylinder device for electromechanical braking as claimed in claim 1, wherein the mounting rod includes a straight section and a horizontal section provided at both ends of the straight section to the same side of the straight section, the horizontal section being provided with a mounting hole for connection with an external device, the straight section being provided with a threaded hole at a middle portion for connection with the roller screw nut.

5. A brake cylinder device for electromechanical braking as claimed in claim 2 or 4, wherein the projecting section of the roller screw nut is sealed to the end cover by a first O-ring, and the front end of the roller screw nut is sealed to the end cover by a skeleton oil seal.

6. A brake cylinder device for electromechanical braking according to claim 1, characterized in that said roller screws are planetary roller screws.

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