CN213948442U

CN213948442U - Brake mechanism for detecting wheel tread

Info

Publication number: CN213948442U
Application number: CN201822058600.XU
Authority: CN
Inventors: 贺子铭; 马开富
Original assignee: Maanshan City Leishi Track Traffic Equipment Co ltd
Current assignee: Maanshan City Leishi Track Traffic Equipment Co ltd
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2021-08-13
Anticipated expiration: 2028-12-07

Abstract

The utility model discloses a wheel tread detects uses arrestment mechanism belongs to wheel detection technical field. The utility model discloses a tread detects uses arrestment mechanism, including lead screw, electromagnetic braking ware, stopper coupling piece and coupling piece connecting plate, wherein lead screw one end is fixed continuous with the drive plate bottom, and its other end passes electromagnetic braking ware, stopper coupling piece, coupling piece connecting plate in proper order and links to each other with the screw-nut screw thread, stopper coupling piece and coupling piece connecting plate all link to each other with screw-nut is fixed, and the coupling piece connecting plate outside is equipped with the bearing. Adopt the technical scheme of the utility model the existence that can effectively avoid above-mentioned thread clearance is to the influence of testing result.

Description

Brake mechanism for detecting wheel tread

Technical Field

The utility model belongs to the technical field of the wheel detects, more specifically says, relates to a wheel tread detects uses arrestment mechanism.

Background

In railway applications, the running part, especially the running state of wheel sets, plays an important role in train safety. Wheel set parameters that play an important role in safety include: rim wear, circumferential wear, tread scuffing, and the like. When the tread of the wheel has faults of scratching, peeling, rolling, and the like, extra impact force can be generated on the steel rail in the running process of the train, the service life of the steel rail is shortened, and cracks and fractures can be caused in serious conditions. When the steel rail is hit, the scratch fault also brings impact to the vehicle, generates vibration and has a destructive effect on the vehicle bearing. Therefore, the detection of the defects of the wheel tread surface, such as abrasion, radial jump and the like, has important significance for ensuring the safe operation of the train.

Among them, the contact measurement method can realize on-line dynamic detection and get the attention of researchers because of relatively high detection precision. The detection principle of the contact measurement method is as follows: when the locomotive wheel has out-of-round faults, the radius of the wheel in the whole circumference is different, but the wheel rim is always kept unchanged because the out-of-round wheel is only the tread part, so that the defect of the wheel tread can be judged by monitoring the change of the height of the wheel rim. Therefore, as shown in fig. 1, the contact measurement method is that a pedal 3 which can follow up along with the rolling of the wheel and is always in contact with the top point of the rim of the wheel 2 is directly arranged on the inner side of a track 1, and the variation of the pressing displacement of the pedal in the rolling process of the wheel is measured through a displacement sensor, so that the out-of-roundness and the radial run-out condition of the tread of the wheel can be obtained.

However, because the wheel rims of different wheels have different heights, the pedal is pressed by the wheels with different pressing amounts, and when the wheel rims have larger heights, the pedal is pressed by the wheels with larger pressing amounts, so that a detection mechanism is easy to generate larger impact action, detection equipment is easy to damage, and the accuracy of a detection result is influenced. Therefore, the initial height of the pedal is adjusted to meet the detection requirements of different wheels before detection, so that the service life of the detection equipment is prolonged, and the detection precision is improved. For this reason, the applicant studied to solve the above problems by the provision of the pedal height adjusting means.

As shown in fig. 2, the pedal height adjusting device includes a driving plate 4, a slide rail mechanism 5 and a driving mechanism, wherein the driving plate 4 is slidably connected to the pedal 3 for detection through the slide rail mechanism 5, and the driving plate 4 is drivingly connected to the driving mechanism. Specifically, the driving mechanism comprises a driving motor 601, a lead screw 604 and a lead screw nut 606, an output shaft of the driving motor 601 is fixedly connected with one end of the lead screw 604, the other end of the lead screw 604 is in threaded connection with the lead screw nut 606, and the lead screw nut 606 is fixedly connected with the driving plate 4. The driving plate 4 is driven by the driving mechanism to move up and down, so that the pedal 3 is driven to move up and down together, and the height of the pedal 3 can be adjusted.

When the wheel presses the pedal 3 for detection, the driving mechanism stops running, the driving plate 4 keeps still under the supporting action of the driving mechanism, and the pedal 3 moves downwards relative to the driving plate 4 along the sliding rail mechanism 5. When the wheel presses the pedal 3, the driving plate 4 is pressed vertically downwards, but due to structural and machining errors, a thread gap inevitably exists between the screw nut 606 and the screw 604, so that the screw nut 606 rotates in the limited gap, the driving plate 4 moves downwards, and inaccurate data acquisition is caused. Therefore, how to avoid the existence of the thread clearance has important significance on the detection result.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome because there is the thread clearance between footboard for altitude mixture control actuating mechanism's screw nut and the lead screw, can lead to drive plate downstream in the testing process to the influence detects not enough of precision, provides a tread detects and uses arrestment mechanism. Adopt the technical scheme of the utility model the existence that can effectively avoid above-mentioned thread clearance is to the influence of testing result.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a tread detects uses arrestment mechanism, including lead screw, electromagnetic braking ware, stopper coupling piece and coupling piece connecting plate, wherein lead screw one end is fixed continuous with the drive plate bottom, and its other end passes electromagnetic braking ware, stopper coupling piece, coupling piece connecting plate in proper order and links to each other with the screw-nut screw thread, stopper coupling piece and coupling piece connecting plate all link to each other with screw-nut is fixed, and the coupling piece connecting plate outside is equipped with the bearing.

Furthermore, the electromagnetic brake is fixedly arranged on a bottom plate, and the bottom plate is fixedly arranged at the bottom of the track.

Furthermore, the bearing is arranged in a bearing seat, and the bearing seat is fixedly connected with the bottom plate.

Furthermore, a supporting fixing seat is installed at the bottom of the driving plate, and the screw rod is fixedly connected with the supporting fixing seat through a coupler.

Furthermore, the installation distance between the electromagnetic brake and the brake coupling sheet is not more than 0.25 mm.

Furthermore, the braking mechanisms are symmetrically arranged at the two ends of the bottom of the driving plate.

Furthermore, the driving plate is connected with the pedal through an elastic element.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the utility model discloses a tread detects uses arrestment mechanism, including lead screw, electromagnetic braking ware, stopper coupling piece and coupling piece connecting plate, through this arrestment mechanism of installation bottom the drive plate to can prevent effectively that the influence to the testing result from the existence of threaded clearance between lead screw nut and the lead screw among the drive plate height adjusting device in the testing process, make the wheel through the time drive plate can not produce decurrent displacement, and then guarantee the accuracy of testing result.

(2) The utility model discloses a tread detects uses arrestment mechanism, when high adjusting device operation drive plate up-and-down motion, the drive plate is at the in-process that goes up and down, and the lead screw receives axial force and radial force, and radial force drives stopper coupling piece, coupling piece connecting plate, screw-nut and bearing inner race and rotates together to guarantee the normal clear of drive plate lift. When the driving plate is lifted to a specified position, and the wheel presses the pedal for detection, the power supply of the electromagnetic brake is turned on, and at the moment, a large attractive force is generated between the electromagnetic brake and the brake coupling piece, and the attractive force is greater than the pressure applied to the driving plate when the wheel passes through, so that the axial force and the radial force applied to the screw rod when the wheel passes through are offset, and the driving plate can not generate displacement when the wheel passes through.

(3) The utility model discloses a tread detects uses arrestment mechanism, this arrestment mechanism symmetry is installed at the bottom both ends of drive plate to be favorable to further improving the structural stability of drive plate, guarantee arrestment mechanism's braking effect. The drive plate is connected with the pedal through the elastic element, so that the follow-up between the pedal and the wheel in the detection process can be ensured, the pedal is always in contact with the rim of the wheel, and the pedal can automatically return to the initial height when the wheel leaves.

Drawings

FIG. 1 is a schematic diagram of a contact measurement method for measuring out-of-roundness of a wheel tread;

FIG. 2 is a schematic view of the installation structure of the pedal height adjusting device of the present invention;

fig. 3 is a schematic view of the installation structure of the braking mechanism of the present invention;

fig. 4 is a schematic structural view of the braking mechanism of the present invention;

fig. 5 is a schematic structural view of the pedal height adjusting device of the present invention.

The reference numerals in the schematic drawings illustrate:

1. a track; 2. a wheel; 3. a pedal; 4. a drive plate; 5. a slide rail mechanism; 501. a slider; 502. a guide rail; 601. a drive motor; 602. a motor base; 603. a lead screw supporting seat; 604. a lead screw; 605. a lead screw nut seat; 606. a lead screw nut; 7. a base plate; 8. a displacement measuring unit; 801. a displacement sensor; 802. a displacement sensing plate; 901. a baffle plate; 902. an elastic element; 903. an elastic element mount; 10. a brake mechanism; 1001. a supporting fixed seat; 1002. a coupling; 1003. a screw rod; 1004. an electromagnetic brake; 1005. a brake coupling tab; 1006. a coupling piece connecting plate; 1007. a feed screw nut; 1008. a bearing; 1009. and a bearing seat.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

Example 1

As shown in fig. 2 and 5, the height adjusting device for a contact method wheel tread defect detection pedal of the embodiment includes a driving plate 4, a slide rail mechanism 5 and a driving mechanism, wherein the driving plate 4 is slidably connected with the detection pedal 3 through the slide rail mechanism 5, and the driving plate 4 is also drivingly connected with the driving mechanism. When measuring tread defect to current contact method, the high unable regulation of footboard 3, the not enough of great impact of easy production, this embodiment passes through drive plate 4 and actuating mechanism's setting, according to waiting to detect the rim height of wheel before the train wheel arrives, through actuating mechanism drive plate 4 up-and-down motion, because footboard 3 can carry out follow-up from top to bottom, consequently footboard 3 carries out up-and-down motion along with drive plate 4, consequently, realized the altitude mixture control of footboard 3, can satisfy the detection demand of the high wheel of different rims. And after the train wheel presses the pedal 3, the driving mechanism stops running, the driving plate 4 keeps still under the supporting action of the driving mechanism, the pedal 3 moves downwards relative to the driving plate 4 along the sliding rail mechanism under the rolling action of the wheel, and the out-of-roundness and radial runout conditions of the wheel tread can be obtained according to the pressing displacement change of the pedal 3 in the wheel rolling process.

Specifically, the driving mechanism of this embodiment includes a driving motor 601, a lead screw 604 and a lead screw nut 606, an output shaft of the driving motor 601 is fixedly connected to one end of the lead screw 604, the other end of the lead screw 604 is connected to the lead screw nut 606 through a thread, and the lead screw nut 606 is fixedly connected to the driving plate 4. When the height of the pedal 3 needs to be adjusted, the driving motor is started to drive the lead screw 604 to rotate, and at the moment, the lead screw nut 606 moves along the axial direction of the lead screw 604, so that the heights of the driving plate and the pedal can be adjusted. Above-mentioned footboard 3 installs through elastic element 902 and supports, presses up footboard 3 back when the wheel, and footboard 3 pushes down the motion, can effectively guarantee through elastic element 902's installation that wheel rolling in-process footboard 3 can follow-up from top to bottom along with wheel rim altitude variation, guarantees the normal clear of detection. Meanwhile, when the wheel leaves the pedal 3, the pedal 3 can automatically return to the initial position under the action of the elastic element 902, so that the next detection is facilitated. Specifically, the elastic element 902 of the present embodiment is a compression spring, which is fixedly mounted on the driving plate 4 through an elastic element mounting seat 903, and the pedal 3 is provided with a baffle 901 corresponding to the piston end of the elastic element 902. When the wheel presses the pedal, the pedal 3 moves downwards, the baffle 901 moves downwards along with the pedal and generates elastic compression on the elastic element 902, and when the wheel leaves, the pedal 3 can return to the initial position under the action of the elastic element 902.

When the contact measurement method is used, it is generally necessary to measure the depression displacement of the pedal 3 with a displacement measuring unit. The displacement measuring unit of this embodiment includes a displacement sensor 801 mounted on the driving plate 4 and a displacement sensing plate 802 correspondingly mounted on the pedal 3, and the vertical depression displacement change of the pedal 3 can be obtained through the distance change between the displacement sensor 801 and the displacement sensing plate 802.

The driving plate 4 is pressed vertically downwards when the wheels pass through, and because the driving plate 4 is mainly supported by the driving mechanism and a thread gap inevitably exists between the screw nut 606 and the screw 604, the screw nut 606 rotates in the limited gap, so that the driving plate 4 moves downwards, and inaccurate data acquisition is caused. Based on the above problems, in the embodiment, the brake mechanism 10 is installed at the corresponding position where the lower part of the drive plate 4 is matched with the bottom plate 7, the drive plate 4 can transmit the vertical downward pressure to the brake mechanism 10 when the wheel passes through, and the drive plate 4 does not generate displacement when the wheel is subjected to the pressure by the braking force of the brake mechanism 10, so that the overall structural stability of the detection mechanism and the accuracy of the detection data can be improved.

With reference to fig. 2 to 4, the braking mechanism includes a lead screw 1003, an electromagnetic brake 1004, a brake coupling piece 1005 and a coupling piece connecting plate 1006, wherein one end of the lead screw 1003 is fixedly connected to the bottom of the driving plate 4, the other end of the lead screw passes through the electromagnetic brake 1004, the brake coupling piece 1005 and the coupling piece connecting plate 1006 in sequence and is in threaded connection with a lead screw nut 1007, the brake coupling piece 1005 and the coupling piece connecting plate 1006 are both fixedly connected to the lead screw nut 1007, and a bearing 1008 is disposed on the outer side of the coupling piece connecting plate 1006.

Example 2

The brake mechanism for detecting a tread surface of a wheel according to the present embodiment has a structure substantially similar to that of embodiment 1, and further, the electromagnetic brake 1004 is fixedly attached to the bottom plate 7, and the bottom plate 7 is fixedly attached to the bottom of the rail 1. The bearing 1008 is arranged in a bearing seat 1009, and the bearing seat 1009 is fixedly connected with the bottom plate 7. When the height adjusting device operates to drive the drive plate 4 to move up and down, the screw 1003 receives axial force and radial force in the lifting process of the drive plate 4, and the radial force drives the brake coupling piece, the coupling piece connecting plate, the screw nut and the bearing inner ring to rotate together, so that the normal lifting of the drive plate 4 is ensured. When the driving plate 4 is lifted to a specified position and the wheel presses the pedal 3 for detection, the power supply of the electromagnetic brake 1004 is turned on, and at the moment, a large attractive force is generated between the electromagnetic brake and the brake coupling piece, and the attractive force is greater than the pressure borne by the driving plate 4 when the wheel passes, so that the axial force and the radial force borne by the screw rod 1003 when the wheel passes are counteracted, and the driving plate can not generate displacement when the wheel passes. The installation distance between the electromagnetic brake 1004 and the brake coupling piece 1005 is not more than 0.25 mm.

Example 3

The structure of the brake mechanism for detecting the wheel tread of the embodiment is basically the same as that of the embodiment 2, furthermore, a supporting fixed seat 1001 is installed at the bottom of the driving plate 4, and a screw rod 1003 is fixedly connected with the supporting fixed seat 1001 through a coupler 1002.

Example 4

The structure of the height adjusting device for the contact method wheel tread defect detection pedal is basically the same as that of the height adjusting device in the embodiment 1, and the difference is mainly that: the screw nut 606 is installed in the screw nut seat 605, and the screw nut seat 605 is fixedly connected with the drive plate 4; the driving motor 601 is installed on the motor base 602, the motor base 602 is fixedly connected with the bottom plate 7, and the bottom plate 7 is fixedly installed at the bottom of the track 1. Motor cabinet 602 still links to each other with lead screw supporting seat 603 is fixed in this embodiment, and lead screw 604 passes lead screw supporting seat 603 and links to each other with the motor output shaft, can support the lead screw through setting up of lead screw supporting seat 603, guarantees actuating mechanism's stability. The slide rail mechanism of the embodiment comprises a slide block 501 and a guide rail 502, wherein the slide block 501 is mounted on the pedal 3, the guide rail 502 is correspondingly mounted on the driving plate 4, and the movement of the pedal 3 in the wheel rolling process is guided through the matching of the slide block 501 and the guide rail 502.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a wheel tread detects uses arrestment mechanism which characterized in that: the brake coupling piece comprises a screw rod (1003), an electromagnetic brake (1004), a brake coupling piece (1005) and a coupling piece connecting plate (1006), wherein one end of the screw rod (1003) is fixedly connected with the bottom of a driving plate (4), the other end of the screw rod sequentially penetrates through the electromagnetic brake (1004), the brake coupling piece (1005) and the coupling piece connecting plate (1006) and is in threaded connection with a screw nut (1007), the brake coupling piece (1005) and the coupling piece connecting plate (1006) are fixedly connected with the screw nut (1007), and a bearing (1008) is arranged on the outer side of the coupling piece connecting plate (1006).

2. The brake mechanism for wheel tread surface detection according to claim 1, wherein: the electromagnetic brake (1004) is fixedly arranged on the bottom plate (7), and the bottom plate (7) is fixedly arranged at the bottom of the track (1).

3. The brake mechanism for wheel tread surface detection according to claim 2, wherein: the bearing (1008) is arranged in a bearing seat (1009), and the bearing seat (1009) is fixedly connected with the bottom plate (7).

4. The wheel tread surface detecting brake mechanism according to any one of claims 1 to 3, wherein: the bottom of the driving plate (4) is provided with a supporting fixing seat (1001), and the screw rod (1003) is fixedly connected with the supporting fixing seat (1001) through a coupler (1002).

5. The wheel tread surface detecting brake mechanism according to any one of claims 1 to 3, wherein: the installation distance between the electromagnetic brake (1004) and the brake coupling sheet (1005) is not more than 0.25 mm.

6. The wheel tread surface detecting brake mechanism according to any one of claims 1 to 3, wherein: the braking mechanisms are symmetrically arranged at two ends of the bottom of the driving plate (4).

7. The wheel tread surface detecting brake mechanism according to any one of claims 1 to 3, wherein: the driving plate (4) is connected with the pedal (3) through an elastic element.