CN110422185B - Power device and track check equipment are examined to rail - Google Patents
Power device and track check equipment are examined to rail Download PDFInfo
- Publication number
- CN110422185B CN110422185B CN201910703648.8A CN201910703648A CN110422185B CN 110422185 B CN110422185 B CN 110422185B CN 201910703648 A CN201910703648 A CN 201910703648A CN 110422185 B CN110422185 B CN 110422185B
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- rail
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- cross beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D15/00—Other railway vehicles, e.g. scaffold cars; Adaptations of vehicles for use on railways
- B61D15/08—Railway inspection trolleys
- B61D15/12—Railway inspection trolleys power propelled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention provides a rail detection power device and rail detection equipment, wherein the device comprises: the rack body comprises a first cross beam, a second cross beam and a rack for connecting the first cross beam and the second cross beam; the wheel sets are respectively arranged at two ends of the first cross beam and the second cross beam and comprise rail surface contact wheels and side tension wheels; the power mechanisms are respectively arranged on two opposite sides of the rack and comprise power wheels and an installation mechanism for installing the power wheels on the rack, and the installation mechanism comprises a damping component for damping the power wheels and a brake component for pressing the power wheels to realize braking. According to the rail detection power device capable of automatically walking on the rail, when the rail detection instrument is arranged on the rail detection power device, the rail detection instrument can also move along the rail along with the rail detection power device, manual pushing is not needed, time and labor are saved, and the detection efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of rail detection, in particular to a rail detection power device and rail detection equipment.
Background
The track refers to a route which is laid by strip-shaped steel and used for rail transit trains such as trains and electric trains to run, and is generally laid on the ground, tunnels, bridges and other structures. Because the rail transit train can generate abrasion and vibration to the rail when in operation, the pose of the rail can change, and in order to ensure the normal operation of the rail transit train, the rail usually needs to be regularly detected, such as the detection of the rail center line, the rail surface abrasion, the flaw detection and the like.
Aiming at the track detection requirement, a batch of track detection equipment special for detecting the track is developed, during measurement, the track detection equipment is erected on two parallel tracks, and then the track detection equipment is driven to move along the tracks, so that the detection of track parameters is completed.
However, in the prior art, the problems of the current track detection devices are that: the device can move along the track only by being pushed by manpower, thereby wasting time and labor and having low efficiency.
Disclosure of Invention
Based on this, the invention aims to provide a rail detection power device and a rail detection device, so as to solve the technical problem that the rail detection device in the prior art wastes time and labor during detection.
According to a rail detection power device in an embodiment of the invention, the device comprises:
the rack body comprises a first cross beam, second cross beams arranged in parallel with the first cross beam at intervals and a rack for connecting the first cross beam and the second cross beams;
the wheel sets are respectively arranged at two ends of the first cross beam and the second cross beam and comprise rail surface contact wheels which roll tightly against the rail surfaces during detection and side tension wheels which press the inner side surfaces of the rails to roll during detection; and
the damping mechanism comprises at least two power mechanisms used for walking on a track, wherein the power mechanisms are respectively arranged on two opposite sides of the rack, each power mechanism comprises a power wheel and an installation mechanism used for installing the power wheel on the rack, and the installation mechanism comprises a damping component used for damping the power wheel and a brake component used for pressing the power wheel to realize braking.
Furthermore, the damping assembly comprises a damping shell fixedly arranged on the rack and a damper arranged in the damping shell, and the bottom end of the damper is connected with the power wheel.
Further, the brake assembly comprises a rotary disc and a threaded sleeve arranged on the rotary disc, the threaded sleeve is rotatably arranged on the shock absorption shell in a penetrating mode, and the tail end of the threaded sleeve extends into the shock absorption shell and is connected with the top end of the shock absorber in a threaded mode.
Further, installation mechanism still including wearing to establish spacing pole on the bumper shock absorber, the relative both sides of shock attenuation casing are equipped with spacing waist hole respectively, the spacing pole erects at two spacing waist is downthehole, and can follow in the spacing waist hole the axial slip of bumper shock absorber.
Furthermore, the shock absorption assembly comprises a first connecting rod and an elastic component, the middle part of the first connecting rod is hinged to the rack, one end of the first connecting rod is connected with the power wheel, the other end of the first connecting rod is connected with the rack through the elastic component, and the elastic component is used for supporting and absorbing shock for the power wheel.
Further, the brake assembly comprises a second connecting rod and a brake handle arranged at one end of the second connecting rod, the middle of the second connecting rod is hinged to the rack, and one end, far away from the brake handle, of the second connecting rod is connected with the elastic component.
Further, the second link is located above the first link, and the elastic member is connected between the second link and the first link.
Further, installation mechanism still includes spacing subassembly, spacing subassembly includes fixing base and bolt, the second connecting rod is close to brake handle's one end is provided with the spacing hole of arc, the fixing base set firmly in the frame, the screw rod of bolt passes the spacing hole of arc with the fixing base spiro union, the screw rod of bolt can the spacing downthehole relative slip of arc.
Furthermore, the rack body is provided with an instrument mounting support and at least one seat, and the instrument mounting support is positioned on one side of the seat.
The invention also provides track detection equipment which comprises a track detection instrument and the track detection power device, wherein the track detection instrument is arranged on the track detection power device.
The invention has the beneficial effects that: through setting up a rail that can walk on the track automatically and examine power device, make when this rail was examined on the power device when the setting of track detecting instrument, also can follow the rail and examine power device and remove along the track together, need not the manpower and promote, labour saving and time saving improves detection efficiency greatly.
Drawings
Fig. 1 is a perspective view of a rail inspection power device according to a first embodiment of the present invention;
FIG. 2 is a perspective view of the rail inspection power device with a cover removed according to the first embodiment of the present invention;
FIG. 3 is an enlarged view taken at I in FIG. 2;
fig. 4 is a perspective view of the power mechanism according to the first embodiment of the present invention;
FIG. 5 is an enlarged view taken at II in FIG. 4;
fig. 6 is an exploded perspective view of the power mechanism according to the first embodiment of the present invention;
fig. 7 is a structural view of a rail detecting power unit which is set up on a rail in a first embodiment of the present invention;
FIG. 8 is an enlarged view taken at III in FIG. 7;
FIG. 9 is an exploded perspective view of an alternative power wheel in accordance with a first embodiment of the present invention;
FIG. 10 is an internal structural view of the power wheel of FIG. 9;
fig. 11 is a perspective view of a power mechanism according to a second embodiment of the present invention;
FIG. 12 is an exploded perspective view of a stop assembly in a second embodiment of the present invention;
fig. 13 is a perspective view of a track detection apparatus in a third embodiment of the present invention.
Description of the main element symbols:
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 8, a rail inspection power device 100 according to a first embodiment of the present invention includes a frame body 10, four wheel sets 20 disposed on the frame body 10, and two power mechanisms 40.
The frame body 10 is a frame structure, and includes a first beam 11, a second beam arranged in parallel and alternately with the first beam 11, and a frame 13 connecting the first beam 11 and the second beam 12. During detection, two ends of the first beam 11 and the second beam 12 are distributed and erected on the track. In other embodiments, the housing body 10 may be configured in any one of an "H" shape, an "i" shape, a "T" shape, etc.
The four wheel sets 20 are respectively arranged at two ends of the first cross beam 11 and the second cross beam 12, and specifically, one wheel set 20 is respectively arranged at the bottoms of two ends of the first cross beam 11 and the second cross beam 12. Upon detection, the wheel set 20 moves along the track. The wheel set 20 includes a rail surface contact wheel 21 rolling against the rail surface a during detection, and a side tension wheel 22 rolling against the rail inner side surface b during detection. Specifically, the side tension pulley 22 is slidably connected to the bottom of the frame body 10 through a sliding block 23, the sliding block 23 is connected to a pushing spring 24, the pushing spring 24 is fixed to the frame body 10, and applies a pushing force to the sliding block 23, so that the side tension pulley 22 is pressed against the inner side surface b of the rail to roll during the detection. Under the tensioning action of the side tensioning wheels 22, the frame body 10 can smoothly move on two rails without being separated from the rails based on the four wheel sets 20 (as shown in fig. 7 to 8).
Wherein, rail face contact wheel 21 and side take-up pulley 22 are the gyro wheel that is used for guaranteeing the rail and examines the power device gesture, need adopt the gyro wheel that has certain intensity and rigidity, can select for ceramic wheel or plastics wheel, avoid adopting the rubber wheel, can guarantee like this that rail face contact wheel 21 and side take-up pulley 22 can not take place too big deformation to guarantee the rail and examine the gesture of power device when the rail-engaging motion, thereby guarantee the detection precision of follow-up rail vehicle equipment.
In the embodiment, the number of the wheel sets 20 is four, but the invention is not limited thereto, and in other embodiments, the number of the wheel sets 20 may be increased or decreased as needed.
The power mechanism 40 is used for walking on the track to improve the power for the track detection power device 100 to move on the track. The two power mechanisms 40 are symmetrically arranged at two opposite sides of the frame 13. Specifically, the power mechanism 40 includes a power wheel 41, and a mounting mechanism 42 for mounting the power wheel 41 on the frame 10, and the mounting mechanism 42 includes a damping component 421 for damping the power wheel 41, and a brake component 422 for pressing the power wheel 41 to realize braking. In the embodiment, the number of the actuating mechanisms 40 is two, but the invention is not limited thereto, and in other embodiments, the number of the actuating mechanisms 40 may be increased as needed, but in order to ensure dynamic balance, the actuating mechanisms 40 should be symmetrically disposed on the two first side edges 11.
In this embodiment, the damping assembly 421 includes a damping housing 4211 fixedly disposed on the frame 13 and a damper 4212 installed in the damping housing 4211, and a bottom end of the damper 4211 is connected to the power wheel 41, so that when the power wheel 41 travels on the rail, the damper 4211 damps the vibration, thereby ensuring the stability and riding comfort of the rail detection power device, and in specific implementation, the damper 4211 may be an automobile damper, a rear wheel damper of an electric vehicle, or a spring damper. In addition, the brake component 422 specifically includes a rotary plate 4221 and a threaded sleeve 4222 arranged on the rotary plate 4221, the threaded sleeve 4222 is rotatably inserted into the shock absorption shell 4211, and the tail end of the threaded sleeve 4222 extends into the shock absorption shell 4211 and is screwed with the top end of the shock absorber 4212. In addition, the mounting mechanism 42 further comprises a limiting rod 423 penetrating through the shock absorber 4212, two opposite sides of the shock absorbing shell 4212 are respectively provided with a limiting waist hole 4213, the limiting rod 423 is erected on the two limiting waist holes 4213 and can slide in the limiting waist holes 4213 along the axial direction of the shock absorber 4212, and the limiting rod 423 is erected on the two limiting waist holes 4213 to limit the shock absorber 4211 to rotate along with the rotary table 4221, so that when the rotary table 4221 is rotated, the shock absorber 4211 is driven to move up and down, the power wheel 41 is extruded when the shock absorber 4221 moves downwards, and the friction force is increased, so that braking is realized. The limit waist hole 4213 is matched with the limit rod 423 to limit the limit position of the shock absorber 4212 moving up and down, when the power wheel 41 normally travels on the rail surface, the limit rod 423 floats at the middle position of the limit waist hole 4213, when the brake is performed, the limit rod 423 moves down, and when the impact of the rail surface on the power wheel 41 is increased (such as passing through a bulge), the limit rod 423 moves up.
Specifically, the power wheel 41 is a wheel set with a built-in power system, and can travel on the track without an external power system. In addition, the tire of the power wheel 41 is made of rubber, and certain deformation is generated at the moment of extrusion, so that the friction force is improved, and the running on a rail surface is realized.
In some alternative embodiments of the present invention, the power wheel 41 may be configured as shown in fig. 9 to 10, and the power wheel 41 shown in the figures includes a hub 411, a rubber tire 412 fixed on the outer side of the hub 411, a middle shaft 413 passing through the center of the hub 411, and a motor 414 and a gear transmission 415 arranged in the hub 411. The middle shaft 413 is fixedly connected with the bottom end of the shock absorber 4211, the hub 411 is rotatably connected with the middle shaft 413 through a bearing, so that the hub 411 rotates relative to the middle shaft 413, the gear transmission mechanism 415 comprises a gear ring 4151 fixed on the inner ring surface of the hub 411, a planetary gear 4152 in meshing transmission with the gear ring 4151 and a sun gear 4153 in meshing transmission with the planetary gear 4152, the motor 414 comprises an outer rotor 4141 and an inner stator 4142, the inner stator 4142 is fixedly arranged on the middle shaft 413, the outer rotor 4141 is rotatably connected with the middle shaft 413 through a bearing, and the sun gear 4153 is fixed on the outer rotor 4141. When the outer rotor 4141 is electrified and rotated, the sun gear 4153 is driven to synchronously drive, and after the sun gear 4153 is driven by the planet gears 4152, the gear ring 4151 is driven to rotate, so that the hub 411 and the rubber tire 412 are driven to rotate, and rolling on the track is realized. In addition, for the power supply of the motor 414, an internal battery and an external power source (the external power source can be fixed on the frame body 10) can be selected for power supply, and when the external power source is used, the middle shaft 413 can be arranged to be hollow so as to facilitate threading.
Further, a surface cover 14 is disposed on the housing body 10, and the surface cover 14 is used for covering the housing body 10 to improve the appearance. In addition, the face cover 14 is provided with an instrument mounting bracket 15 and two seats 16, the instrument mounting bracket 15 is located on one side of the seat 16, specifically located right in front of the seat 16, and is used for supporting and fixing a processing device and/or a display device, such as a computer, an upper computer and the like, for processing data obtained by rail detection. The seat 16 is used for a detection person to sit on the rail detection power device and move along a rail, and the rotary table 4221 is located on one side of the seat 16, so that the detection person can conveniently brake.
To sum up, power device 100 is examined to rail among this embodiment, examines power device through setting up a rail that can walk on the rail is automatic, makes when this rail examines on power device when the setting of track detecting instrument, also can follow the rail and examine power device and remove along the track together, need not the manpower and promotes, and labour saving and time saving improves detection efficiency greatly.
Referring to fig. 11 to 12, a rail detecting power device 100 according to a second embodiment of the present invention is shown, wherein the rail detecting power device 100 of the present embodiment is different from the rail detecting power device 100 of the first embodiment in that:
the damping assembly 421 in this embodiment includes a first link 4213 and an elastic member 4214, a middle portion of the first link 4213 is hinged to the frame 13, one end of the first link 4213 is connected to the power wheel 41, and the other end of the first link 4213 is connected to the frame 13 through the elastic member 4214. Specifically, the elastic member 4214 is two springs.
In addition, the brake assembly 422 comprises a second connecting rod 4223 and a brake handle 4224 arranged at one end of the second connecting rod 4223, the middle part of the second connecting rod 4223 is hinged to the frame 13, one end of the second connecting rod 4223, which is far away from the brake handle 4224, is connected with an elastic component 4214, the second connecting rod 4223 is positioned above the first connecting rod 4213, and the elastic component 4214 is connected between the second connecting rod 4223 and the first connecting rod 4213. When the power wheel 41 runs on a rail surface, the power wheel 41 stretches the elastic component 4214 through the first connecting rod 4213, the elastic component 4214 supports and absorbs shock for the power wheel 41 in turn, and when braking is performed, the brake handle 4224 is pushed downwards, the elastic component 4214 is further stretched, the tensile force of the elastic component 4214 on the first connecting rod 4213 is increased, the extrusion force of the first connecting rod 4213 on the power wheel 41 is increased, and friction is increased to achieve braking.
In addition, the mounting mechanism 42 further includes a limiting component 424, the limiting component 424 includes a fixing seat 4241 and a bolt 4242, an arc-shaped limiting hole 4225 is formed in one end, close to the brake handle 4224, of the second connecting rod 4223, the fixing seat 4241 is fixedly arranged on the frame 13, a screw rod of the bolt 4242 penetrates through the arc-shaped limiting hole 4225 to be in threaded connection with the fixing seat 4241, the screw rod of the bolt 4242 can slide in the arc-shaped limiting hole 4225 relatively, and specifically, the screw rod of the bolt 4242 can be in a polished rod (without threads) state at a position penetrating through the arc-shaped limiting hole 4225 so as to conveniently slide. When the power wheel 41 normally runs on a rail surface, under the action of the pulling force of the elastic component 4214, the bolt 4242 slides to abut against the lower end of the arc-shaped limiting hole 4225, when braking is performed, the brake handle 4224 is pushed downwards, the bolt 4242 slides to abut against the upper end of the arc-shaped limiting hole 4225, and when the brake handle 4224 is loosened after braking is completed, under the action of the pulling force of the elastic component 4214, the bolt 4242 returns to abut against the lower end of the arc-shaped limiting hole 4225.
It should be noted that the apparatus provided in the second embodiment of the present invention has the same implementation principle and the same technical effect as the first embodiment of the present invention, and for the sake of brief description, the corresponding contents in the first embodiment can be referred to for the non-mentioned parts of the embodiment.
Referring to fig. 13, a track detecting apparatus according to a third embodiment of the present invention is shown, which includes a track detecting device 200 and the track detecting power device 100 according to the first embodiment, wherein the track detecting device 200 is disposed on the track detecting power device 100. Specifically, the rail detecting instruments 200 are flaw detectors, the number of the rail detecting instruments 200 is two, and two rail detecting instruments 200 are disposed at both sides of the rail detecting power unit 100.
In other embodiments, the track detection instrument may also be a rapid absolute measuring instrument, a third rail measuring device, a corrugation measuring instrument, or the like, and strictly speaking, all track detection instruments that need to move along the track to complete track detection may be integrated with or mounted on the rack. In addition, the illustrated track detection apparatus may also employ the track detection power device 100 in the second embodiment described above.
In conclusion, the track detection equipment in the embodiment, through setting up a track that can walk on the track automatically and examine power device 100, make when this track was examined on power device 100 in the setting of track detecting instrument 200, also can follow the track and examine power device 100 and move along the track together, need not manpower promotion, labour saving and time saving improves detection efficiency greatly.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (4)
1. A rail inspection power device, the device comprising:
the rack body comprises a first cross beam, second cross beams arranged in parallel with the first cross beam at intervals and a rack for connecting the first cross beam and the second cross beams;
the wheel sets are respectively arranged at two ends of the first cross beam and the second cross beam and comprise rail surface contact wheels which roll tightly against the rail surfaces during detection and side tension wheels which press the inner side surfaces of the rails to roll during detection; and
the device comprises at least two power mechanisms, a frame and a driving mechanism, wherein the power mechanisms are used for walking on a track and are respectively arranged on two opposite sides of the frame;
the damping assembly comprises a damping shell fixedly arranged on the rack and a damper arranged in the damping shell, and the bottom end of the damper is connected with the power wheel;
the brake assembly comprises a rotary disc and a threaded sleeve arranged on the rotary disc, the threaded sleeve is rotatably arranged on the shock absorption shell in a penetrating mode, and the tail end of the threaded sleeve extends into the shock absorption shell and is in threaded connection with the top end of the shock absorber;
the installation mechanism further comprises limiting rods arranged on the shock absorber in a penetrating mode, limiting waist holes are formed in two opposite sides of the shock absorption shell respectively, and the limiting rods are erected on the two limiting waist holes and can axially slide along the shock absorber in the limiting waist holes.
2. A rail inspection power device, the device comprising:
the rack body comprises a first cross beam, second cross beams arranged in parallel with the first cross beam at intervals and a rack for connecting the first cross beam and the second cross beams;
the wheel sets are respectively arranged at two ends of the first cross beam and the second cross beam and comprise rail surface contact wheels which roll tightly against the rail surfaces during detection and side tension wheels which press the inner side surfaces of the rails to roll during detection; and
the device comprises at least two power mechanisms, a frame and a driving mechanism, wherein the power mechanisms are used for walking on a track and are respectively arranged on two opposite sides of the frame; the damping assembly comprises a first connecting rod and an elastic component, the middle part of the first connecting rod is hinged to the rack, one end of the first connecting rod is connected with the power wheel, the other end of the first connecting rod is connected with the rack through the elastic component, and the elastic component is used for supporting and damping the power wheel;
the brake assembly comprises a second connecting rod and a brake handle arranged at one end of the second connecting rod, the middle part of the second connecting rod is hinged to the rack, and one end, far away from the brake handle, of the second connecting rod is connected with the elastic component;
the second connecting rod is positioned above the first connecting rod, and the elastic part is connected between the second connecting rod and the first connecting rod;
the mounting mechanism further comprises a limiting assembly, the limiting assembly comprises a fixing seat and a bolt, the second connecting rod is close to one end of the brake handle and is provided with an arc-shaped limiting hole, the fixing seat is fixedly arranged on the rack, a screw rod of the bolt penetrates through the arc-shaped limiting hole and the fixing seat in a threaded manner, and the screw rod of the bolt can slide relatively in the arc-shaped limiting hole.
3. The rail inspection power device according to claim 1 or 2, wherein the frame body is provided with an instrument mounting bracket and at least one seat, and the instrument mounting bracket is positioned at one side of the seat.
4. A rail detection apparatus comprising a rail detection instrument and the rail detection power unit according to any one of claims 1 to 3, wherein the rail detection instrument is disposed on the rail detection power unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910703648.8A CN110422185B (en) | 2019-07-31 | 2019-07-31 | Power device and track check equipment are examined to rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910703648.8A CN110422185B (en) | 2019-07-31 | 2019-07-31 | Power device and track check equipment are examined to rail |
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| Publication Number | Publication Date |
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| CN110422185A CN110422185A (en) | 2019-11-08 |
| CN110422185B true CN110422185B (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910703648.8A Active CN110422185B (en) | 2019-07-31 | 2019-07-31 | Power device and track check equipment are examined to rail |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111068194B (en) * | 2019-12-23 | 2021-10-01 | 哈尔滨工程大学 | Self-adaptive escape system for stairs |
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|---|---|---|---|---|
| CN1275496A (en) * | 1999-05-26 | 2000-12-06 | 德里森航空控股公司 | Brake device with braking regulation system |
| CN201961321U (en) * | 2011-03-03 | 2011-09-07 | 中铁一局集团有限公司 | Simple track carrier vehicle used for railway electrical construction |
| JP2015127192A (en) * | 2013-11-26 | 2015-07-09 | ホツタ株式会社 | Brake mechanism of vehicle |
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| Publication number | Publication date |
|---|---|
| CN110422185A (en) | 2019-11-08 |
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