CN108099934B - Travelling wheel mechanism with automatic lifting function for track trolley - Google Patents
Travelling wheel mechanism with automatic lifting function for track trolley Download PDFInfo
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- CN108099934B CN108099934B CN201711387343.8A CN201711387343A CN108099934B CN 108099934 B CN108099934 B CN 108099934B CN 201711387343 A CN201711387343 A CN 201711387343A CN 108099934 B CN108099934 B CN 108099934B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 48
- 239000003921 oil Substances 0.000 claims description 38
- 230000005484 gravity Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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- 229910052742 iron Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The invention relates to a traveling wheel mechanism with an automatic lifting function for a track trolley, which has the traveling function, a hydraulic lifting function and a fastening limiting function and can realize safe and reliable traveling, lifting and fastening limiting between the track trolley and an I-shaped track. Comprising the following steps: the hydraulic lifting device comprises a travelling structure, a hydraulic lifting structure and a fastening limiting structure; the advancing structure comprises an advancing wheel matched with the I-shaped track; the hydraulic lifting structure comprises a hydraulic cylinder for driving the travelling wheel to ascend or descend so as to be separated from or contacted with the I-shaped track; when the travelling wheel is in contact with the I-shaped track, the track trolley is supported on the I-shaped track through the travelling wheel, and is in a travelling state; when the travelling wheel is separated from the I-shaped track, the track trolley is supported on the supporting frames on the two sides of the I-shaped track, and the track trolley and the supporting frames are fastened and limited through the fastening limiting structure, so that the track trolley is in a fastening limiting state.
Description
Technical Field
The invention relates to a traveling wheel mechanism, in particular to a traveling wheel mechanism with an automatic lifting function, and belongs to the technical field of mechanical design.
Background
A series of environment tests are required to be carried out on certain equipment, the equipment is placed on a rail trolley through a crane before the tests, and then the rail trolley is transported to different specific positions of an environment test box along an I-shaped rail for corresponding tests so as to check the environment resistance function and performance of the equipment.
Because the equipment has high weight and needs to be continuously turned for a long time at high speed in the test process, the inertial impact force is high; while the track carriages carrying the test equipment need to be frequently travelled to the corresponding positions during the test. If the rail trolley can not be safely and reliably fastened and limited between the rail trolley and the I-shaped rail after the rail trolley moves in place, the impact force in the test can possibly cause the rail trolley to move back and forth on the I-shaped rail, so that the risk of impact damage to the test detection equipment and the test equipment is high; meanwhile, the rail trolley is required to conveniently, reliably and rapidly travel above the I-shaped rail.
The existing rigid fastening between the rail trolley and the I-shaped rail adopts a mode of combining axial and lateral set screws and iron wires, and the set screws and the iron wires are more required by the fastening mode because the rail trolley and the I-shaped rail are in small-area contact, and the fastening mode is time-consuming and labor-consuming and easy to cause unbalanced stress; meanwhile, the rail trolley is higher in height, and large eccentric moment is easy to generate when equipment is operated. When the test equipment is light in weight and small in rotational inertia, the fastening mode can effectively ensure the smooth test; however, when the mass of the test equipment is large and the rotational inertia is large, and meanwhile, when the brake is frequently started and the equipment is operated at a high speed for a long time in the test process, the vibration impact alternating force is particularly large, so that the risk that the set screw is easy to loosen and the steel wire is broken in the test process exists in the connection mode, the relative motion relationship exists between the track trolley and the track, and the situation can bring great potential safety hazards to the test equipment, the test detection equipment and the test staff. Meanwhile, the fastening mode is inconvenient to operate, time-consuming, labor-consuming, poor in safety and reliability, and meanwhile, the I-shaped track and the track trolley are scratched and damaged.
Meanwhile, the travelling wheel structure of the existing track trolley generally selects pneumatic rubber tires and solid rubber tires, the application range of the rubber tires is wide, and the price of the rubber tires is low. However, the rubber tire has the defects of large size, high height of the trolley and high gravity center position of equipment, and the rubber tire is easy to be corroded by oil liquid, impacted by environmental change of test and acted by vibration impact alternating force generated during high-speed running of equipment, so that tire sudden failure can occur in the whole process of environmental test. In addition, the rubber tire is easy to derail when running on the I-shaped track. This situation will also present a significant safety hazard to test equipment, test detection equipment and personnel.
Disclosure of Invention
In view of the above, the present invention provides a traveling wheel mechanism with an automatic lifting function for a rail car, which can realize safe and reliable traveling, lifting and fastening limiting between the rail car and an i-shaped rail.
The travelling wheel mechanism with the automatic lifting function for the track trolley is arranged on the track trolley and comprises: the hydraulic lifting device comprises a travelling structure, a hydraulic lifting structure and a fastening limiting structure;
the advancing structure comprises an advancing wheel matched with the I-shaped track;
the hydraulic lifting structure comprises a hydraulic cylinder for driving the travelling wheel to ascend or descend so as to be separated from or contacted with the I-shaped track;
when the travelling wheel is in contact with the I-shaped track, the track trolley is supported on the I-shaped track through the travelling wheel, and is in a travelling state; when the travelling wheel is separated from the I-shaped track, the track trolley is supported on the supporting frames on two sides of the I-shaped track, and the track trolley and the supporting frames are fastened and limited through the fastening limiting structure, and at the moment, the track trolley is in a fastening limiting state.
The travel structure further includes: wheel axle and travelling wheel mounting bracket; the travelling wheel is supported on the wheel shaft through a bearing, and the two ends of the bearing are axially limited; the travelling wheel adopts a rail wheel structure;
the bottom of the travelling wheel mounting bracket is of an inverted U-shaped structure, and two side surfaces of an opening end at the bottom of the travelling wheel mounting bracket are respectively sleeved on wheel shafts at two sides of the travelling wheel; and a piston rod of a hydraulic oil cylinder in the hydraulic lifting structure is fixedly connected with the top of the travelling wheel mounting bracket.
The hydraulic oil cylinder in the hydraulic lifting structure is a double-acting oil cylinder; the two ports A and B on the double-acting oil cylinder are respectively connected with a hydraulic pump station through an oil pipe, and the hydraulic pump station realizes the bidirectional circulating motion of a single piston of the double-acting hydraulic cylinder by leading pressure oil to the port A or the port B of the double-acting oil cylinder so as to drive the travelling wheel to lift;
the cylinder body of the double-acting oil cylinder is fixed on a mounting plate, and the mounting plate is connected with a trolley girder of the track trolley through a bolt cushion block and fastened through a screw structure and a fastening pin, so that the travelling wheel mechanism and the trolley girder are rigidly connected into a whole.
The hydraulic lifting structure further comprises a guide rod and a guide sleeve which are used for guiding the lifting of the travelling wheel; the two ends of the wheel shaft are respectively and coaxially connected with the guide sleeve; the guide rod sequentially passes through the threaded cushion block and the trolley main beam and then is in sliding fit with an inner hole of the guide sleeve 7, and the guide sleeve can move along the axial direction of the guide rod.
The fastening limit structure comprises more than two sets of opposite-top nut structures, and when the track trolley is supported on the support frame, the fastening limit connection between the track trolley and the support frame is realized through the more than two sets of opposite-top nut structures on the contact surface of the track trolley.
The beneficial effects are that:
(1) The travelling wheel mechanism has the characteristics of convenient operation, compact structure, simple processing technology, heavy bearing, flexible travelling, no derailment, no damage to the track, stable lifting and the like, has travelling function, hydraulic lifting function and fastening limiting function, and can realize safe and reliable travelling, lifting and fastening limiting between the track trolley and the I-shaped track.
(2) The travelling wheel mechanism supplies pressure oil to the opening A or the opening B of the double-acting oil cylinder through the hydraulic pump station to enable the single piston to extend or retract, so that the travelling wheel is driven to contact or separate from the I-shaped track, meanwhile, the main beam of the trolley is separated from or contacts with the support frame, and the travelling state or the fastening limit state between the track trolley and the I-shaped track can be realized by matching with the opposite nut structure.
(3) The track trolley is driven to move in place through the single piston of the double-acting thin oil cylinder to drive the moving wheel, so that the track trolley is reliably contacted with the support frame, the moving wheel is reliably separated from the I-shaped track, the height of the track trolley can be reduced by adopting the mode, the gravity center position of equipment is reduced, the stability of test equipment is increased, meanwhile, the track trolley is in large-area contact with the support frame, and the track trolley can be conveniently, safely and reliably fastened and limited with the support frame after moving in place by adopting the opposite nut structure.
(4) The travelling wheel of the travelling wheel mechanism adopts a rail wheel structure made of high-strength alloy steel materials; the track trolley is symmetrically provided with even sets (more than or equal to 4 sets) of running wheel mechanisms, when the track trolley is in a running state on two I-shaped tracks, the front surface and the side surface of the track trolley are simultaneously contacted with the I-shaped tracks due to the fact that the running wheels are of the track wheel structure, and the orientation effect of the guide rods is combined; therefore, the travelling wheel mechanism has the advantages of heavy bearing, convenient travelling and difficult derailment when travelling on the I-shaped track.
(5) The travelling wheel mechanism is assembled with the track trolley by adopting a positioning pin and screw structure to be connected into a whole, and the mechanism can be conveniently disassembled and assembled on the track trolley in a connecting mode so as to carry out daily maintenance and test use on the mechanism.
Drawings
Fig. 1 is a front view of a traveling wheel mechanism with an automatic lifting function in a traveling state according to the present invention;
FIG. 2 is a right side view of the travel wheel mechanism with automatic lifting function of the present invention;
FIG. 3 is a top view of the travel wheel mechanism with automatic lifting function of the present invention;
FIG. 4 is a partial cross-sectional view of a snap ring connection in a travel configuration;
fig. 5 is a front view showing a fastening limit state of the traveling wheel mechanism with an automatic lifting function of the present invention.
Wherein: 1-I-shaped track, 2-support frame, 3-travelling wheel, 4-stop washer, 5-round nut, 6-snap ring, 7-uide bushing, 8-wheel axle, 9-circlip, 10-angular contact ball bearing, 11-trolley girder, 12-travelling wheel installing support, 13-thread cushion block, 14-installing plate, 15-guide bar, 16-double-acting cylinder, 17-hydraulic pump station, 18-fastening pin, 19-centering nut structure.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
The embodiment provides a travelling wheel mechanism with an automatic lifting function for a track trolley, which has the characteristics of convenient operation, compact structure, simple processing technology, heavy bearing, no derailment, flexible travelling, no damage to the track, stable lifting and the like, and can realize safe and reliable travelling, lifting and fastening limiting between the track trolley and an I-shaped track.
As shown in fig. 1 and 2, the traveling wheel mechanism with an automatic lifting function includes: the hydraulic lifting device comprises a travelling structure, a hydraulic lifting structure and a fastening limiting structure; the I-shaped track 1 is matched with the groove.
Wherein the travel structure comprises: a travelling wheel 3, an axle 8 and a travelling wheel mounting bracket 12. The wheel axle 8 is made of 40Cr quenched and tempered materials, and the quenched and tempered materials have good comprehensive mechanical properties, low-temperature impact property and higher fatigue strength. The travelling wheel 3 is supported on the wheel axle 8 through a GB/T292-1994 angular contact ball bearing 10, one end of the angular contact ball bearing 10 is axially limited through a GB/T854 round nut stop washer 4 and a GB/T812 round nut 5, and the other end of the angular contact ball bearing 10 is axially limited through a shaft shoulder on the wheel axle 8, so that only relative rolling between the wheel axle 8 and the travelling wheel 3 is ensured. The travelling wheel 3 adopts a rail wheel structure, and when the two I-shaped rails 1 are symmetrically used in pairs, the rail trolley can be ensured not to derail and damage the rails when travelling on the two I-shaped rails 1. The travelling wheel 3 is of a rail wheel structure made of high-strength alloy steel 42CrMo quenched and tempered materials, and the alloy steel structural steel has higher fatigue strength and multiple impact resistance after being quenched and tempered and has good low-temperature impact toughness; therefore, the traveling mechanism has the characteristics of stable lifting, heavy bearing and compact structure.
The bottom of the travelling wheel mounting bracket 12 is of an inverted U-shaped structure, and two side surfaces of the opening end of the travelling wheel mounting bracket are of semicircular structures (the structural form is for mounting the wheel shafts 8), and the travelling wheel mounting bracket is respectively sleeved on the wheel shafts 8 at two sides of the travelling wheel 3, so that the travelling wheel 3 is positioned in the inverted U-shaped structure of the travelling wheel mounting bracket 12. The semicircular clamping ring 6 made of 40Cr quenched and tempered materials is sleeved at the opposite ends of the semicircular structure of the travelling wheel mounting bracket 12 on the wheel shaft 8, the radial limit of the wheel shaft 8 is realized through screw fastening, and the travelling wheel mounting bracket 12 is axially limited by adopting the elastic check ring 9 for the GB/T894.1A type shaft on the outer side of the travelling wheel mounting bracket 12 on the wheel shaft 8, as shown in figure 4.
The hydraulic lifting structure comprises: the double-acting oil cylinder 16, the hydraulic pump station 17, the wear-resistant guide sleeve 7 and the guide rod 15. The piston rod of the double-acting cylinder 16 is connected with the top of the travelling wheel mounting bracket 12 through a threaded structure, and the double-acting cylinder 16 has the characteristics of small volume, small length and small stroke. The cylinder body of the double-acting cylinder 16 is connected with the mounting plate 14 through a screw structure so as to be fixed on the mounting plate 14, the mounting plate 14 is connected with the trolley girder 11 through a bolt cushion block 13 and is fastened through the screw structure and a GB/T119.1 fastening pin 18, so that the travelling wheel mechanism and the trolley girder 11 are rigidly connected into a whole. The fastening pin 18 plays a role of a positioning pin in the structure, ensures that the guide rod 15 moves and centers in the inner hole, thereby ensuring the guiding and anti-loose functions of the guide rod, and simultaneously facilitates the disassembly and assembly between the mechanism and the trolley girder 11. The trolley girder 11 is formed by welding hot-rolled common channel steel 63X 40X 4.8-GB/T706-2008 serving as a main material. The travelling wheel mechanism is assembled with the track trolley (the trolley main beam 11) into a whole by adopting a locating pin and screw structure, and the mechanism can be conveniently disassembled and assembled on the track trolley in a connecting mode so as to carry out daily maintenance and test use on the track trolley. According to the actual working condition, a plurality of sets of travelling wheel mechanisms with automatic lifting functions can be adopted to be applied to the track trolley.
The two ends of the wheel axle 8 are respectively and coaxially connected with the wear-resistant guide sleeve 7, the wheel axle 8 is connected with the wheel axle through interference fit, wherein the two ends of the wheel axle 8 are provided with a symmetrical surface milling structure, and the structure is convenient for installation between the wear-resistant guide sleeve 7 and the wheel axle 8. The guide rod 15 axially parallel to the piston rod of the double-acting oil cylinder 16 sequentially passes through the threaded cushion block 13 and the trolley main beam 11 and then is in sliding fit with the inner hole of the wear-resistant guide sleeve 7, and the wear-resistant guide sleeve 7 can axially move along the guide rod 15. The wear-resistant guide sleeve 7 is made of QAL9-4 (iron-containing aluminum bronze) materials, has high strength, antifriction and good corrosion resistance, and is particularly suitable for use in the test environment. The guide rod 15 plays a guide role in the contact and separation process between the travelling wheel 3 and the I-shaped track 1, so that the travelling wheel 3 and the I-shaped track 1 can be safely and reliably contacted and separated; meanwhile, the track wheel structure combined with the travelling wheel 3 can ensure that the travelling wheel 3 travels normally on the I-shaped track 1 and does not derail; meanwhile, the structure effectively plays a role in preventing looseness of threaded connection between the double-acting oil cylinder 16 and the travelling wheel mounting bracket 12.
The oil ports of the two cavities of the double-acting oil cylinder 16 are respectively an A port and a B port, the A port and the B port of the double-acting oil cylinder 16 are respectively connected with a hydraulic pump station 17 through oil pipes, and the hydraulic pump station 17 can be used for leading pressure oil to the A port or the B port of the double-acting oil cylinder 16, so that the bidirectional circulating movement of a single piston of the double-acting thin type hydraulic cylinder 16 is realized, and the travelling wheel 3 is driven to lift. Four traveling wheel mechanisms with automatic lifting function (sharing one hydraulic pump station 17) are adopted in the track trolley of the example, as shown in fig. 3, wherein the stroke of a single piston of the double-acting oil cylinder 16 is 0-300 mm, and the oil supply pressure of the hydraulic pump station is 10-14 MPa.
The fastening limit structure includes: the trolley comprises a support frame 2 and four sets of opposite-top nut structures 19, wherein the support frame 2 is arranged on two sides of an I-shaped track 1, when a travelling wheel 3 is in contact with the I-shaped track 1, a trolley main beam 11 is not in contact with the support frame 2, and at the moment, the gravity support of the travelling wheel mechanism is supported on the I-shaped track 1 through the travelling wheel 3; when the travelling wheel 3 is gradually separated from the I-shaped track 1, the travelling wheel mechanism loses support and descends under the action of gravity, so that the trolley girder 11 is gradually contacted with the support frame 2, and when the single piston of the double-acting oil cylinder 16 is contracted in place, the trolley girder 11 is in large-area close contact with the support frame 2. After the trolley girder 11 and the support frame 2 are tightly contacted in a large area, the two are fastened and limited through four sets of opposite-top nut structures 19 on the contact surface, and the four sets of opposite-top nut structures 19 are positioned at the periphery of the trolley, so that the prescription is convenient to disassemble and assemble. As shown in fig. 2, after the two nuts in the opposite-top nut structure 19 are oppositely screwed, the screwing threads are always subjected to additional pressure and friction force, and when the working load changes, the friction force still exists. And when the travelling wheel 3 and the I-shaped track 1 are gradually contacted, the trolley girder 11 and the support frame 2 are gradually separated, and the test trolley can conveniently travel on the I-shaped track 1 after the single piston stretches in place.
The travelling wheel mechanism with the automatic lifting function has two working states, namely a travelling state and a fastening limiting state:
traveling state:
the hydraulic pump station 17 supplies pressure oil to the port A of the double-acting oil cylinder 16, the port B is used for oil return, and the piston gradually stretches out under the action of the pressure oil, so that the traveling wheel 3 is driven to move downwards through the traveling wheel mounting bracket 12, and the traveling wheel 3 is gradually contacted with the I-shaped track 1 (in the moving process, the guide rod 15 plays a guide role); simultaneously, the trolley girder 11 is gradually separated from the support frame 2; when the single piston of the double-acting thin hydraulic cylinder 16 extends out to the right, the running wheel 3 can be contacted with the I-shaped track 1 safely and reliably, and meanwhile, the trolley girder 11 is completely separated from the support frame 2, so that the track trolley can run on the I-shaped track 1 safely and reliably, as shown in figure 1.
Fastening limit state:
the hydraulic pump station 17 supplies pressure oil to the port B of the double-acting oil cylinder 16, at the moment, the port A is used for oil return, the piston gradually contracts under the action of the pressure oil so as to enable the travelling wheel 3 to move upwards, the travelling wheel 3 and the I-shaped track 1 are gradually separated, and the trolley main beam 11 sinks under the action of gravity and gradually contacts with the support frame 2. After the thin hydraulic cylinder 16 is contracted in place by a single piston, the large-area close contact between the trolley girder 11 and the support frame 2 can be realized, meanwhile, the travelling wheel 3 is separated from the I-shaped track 1 safely and reliably, and finally, the track trolley and the support frame 2 are fastened and limited through the opposite nut structure 19 so as to facilitate subsequent test work, as shown in fig. 5.
After the track trolley advances to the right position, the travelling wheel mechanism adopting the structural form drives the travelling wheel to reduce the main beam height of the trolley through the hydraulic pump station and the double-acting thin hydraulic cylinder so as to reduce the gravity center position of the test equipment, so that the stability of the test equipment can be increased; meanwhile, when the trolley is required to be fastened, the trolley and the support frame can be fastened fast, conveniently, safely and reliably through the opposite-top nut structure of the mechanism, so that the fastening limit between the trolley and the support frame is realized; when the track trolley needs to travel on the I-shaped track, the rigid connection between the trolley and the support frame can be quickly removed by loosening the opposite-top nut structure of the mechanism, and the traveling wheel is driven to contact with the I-shaped track by the hydraulic pump station and the double-acting thin hydraulic cylinder so that the track trolley travels. Meanwhile, the mechanism has the advantages of large bearing and convenient and fast running, so that the rail trolley does not derail when running on the I-shaped rail, and the normal and smooth running of the test can be effectively ensured.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A travelling wheel mechanism for track platform truck has automatic lifting function, its characterized in that: the travelling wheel mechanism is installed on the track trolley, and comprises: the hydraulic lifting device comprises a travelling structure, a hydraulic lifting structure and a fastening limiting structure;
the travelling structure comprises a travelling wheel (3) matched with the I-shaped track (1);
the hydraulic lifting structure comprises a hydraulic cylinder for driving the travelling wheel (3) to ascend or descend so as to be separated from or contacted with the I-shaped track (1);
when the travelling wheel (3) is in contact with the I-shaped track (1), the track trolley is supported on the I-shaped track (1) through the travelling wheel (3), and is in a travelling state; when the travelling wheel (3) is separated from the I-shaped track (1), the track trolley is supported on the supporting frames (2) on two sides of the I-shaped track (1), and the track trolley and the supporting frames (2) are fastened and limited through the fastening and limiting structure, and at the moment, the track trolley is in a fastening and limiting state;
the travel structure further includes: an axle (8) and a travelling wheel mounting bracket (12); the travelling wheel (3) is supported on the wheel shaft (8) through a bearing, and the two ends of the bearing are axially limited;
the bottom of the travelling wheel mounting bracket (12) is of an inverted U-shaped structure, and two side surfaces of the opening end of the bottom are respectively sleeved on wheel shafts (8) at two sides of the travelling wheel (3); a piston rod of a hydraulic oil cylinder in the hydraulic lifting structure is fixedly connected with the top of the travelling wheel mounting bracket (12);
the hydraulic oil cylinder in the hydraulic lifting structure is a double-acting oil cylinder (16); the two oil ports A and B on the double-acting oil cylinder (16) are respectively connected with a hydraulic pump station (17) through oil pipes, and the hydraulic pump station (17) realizes the bidirectional circulating motion of a single piston of the double-acting oil cylinder (16) by leading pressure oil to the A port or the B port of the double-acting oil cylinder (16) so as to drive the travelling wheel (3) to lift;
the cylinder body of the double-acting oil cylinder (16) is fixed on a mounting plate (14), the mounting plate (14) is connected with a trolley main beam (11) of the track trolley through a bolt cushion block (13) and is fastened through a screw structure and a fastening pin (18), so that the travelling wheel mechanism and the trolley main beam (11) are rigidly connected into a whole;
when the travelling wheel (3) is in contact with the I-shaped track (1), the trolley main beam (11) is not in contact with the support frame (2), and at the moment, the gravity support of the travelling wheel mechanism is supported on the I-shaped track (1) through the travelling wheel (3); when the travelling wheel (3) is gradually separated from the I-shaped track (1), the travelling wheel mechanism loses support and descends under the action of gravity, so that the trolley girder (11) is gradually contacted with the support frame (2);
one end of the bearing is axially limited through a stop washer (4) and a round nut (5), and the other end of the bearing is axially limited through a shaft shoulder of a wheel shaft (8).
2. The traveling wheel mechanism with an automatic lifting function for a rail car according to claim 1, wherein: the travelling wheel (3) adopts a rail wheel structure.
3. The traveling wheel mechanism with an automatic lifting function for a rail car according to claim 1, wherein: the hydraulic lifting structure also comprises a guide rod (15) and a guide sleeve (7) which are used for guiding the lifting of the travelling wheel (3); two ends of the wheel shaft (8) are respectively and coaxially connected with the guide sleeve (7); the guide rod (15) sequentially passes through the threaded cushion block (13) and the trolley main beam (11) and then is in sliding fit with an inner hole of the guide sleeve (7), and the guide sleeve (7) can move along the axial direction of the guide rod (15).
4. A travelling wheel mechanism with automatic lifting function for a rail car according to any one of claims 1-3, characterized in that: the fastening limit structure comprises more than two sets of opposite-top nut structures (19), and when the track trolley is supported on the support frame (2), the fastening limit connection between the two sets of opposite-top nut structures (19) is realized on the contact surface of the track trolley.
5. The traveling wheel mechanism with an automatic lifting function for a rail car according to claim 1, wherein: the two sides of the opening end of the inverted U-shaped structure at the bottom of the travelling wheel mounting bracket (12) are of a semicircular structure and are respectively sleeved on wheel shafts (8) at two sides of the travelling wheel (3), so that the travelling wheel (3) is positioned in the inverted U-shaped structure; the semicircular clamping ring (6) is sleeved at the opposite end of the semicircular structure of the travelling wheel mounting bracket (12) on the wheel shaft (8) to radially limit the wheel shaft (8), and the outer side of the travelling wheel mounting bracket (12) on the wheel shaft (8) is axially limited by adopting the circlip (9) to axially limit the travelling wheel mounting bracket (12).
6. A travelling wheel mechanism with automatic lifting function for a rail car according to any one of claims 1-3, characterized in that: the travelling wheel (3) is of a rail wheel structure made of high-strength alloy steel 42CrMo quenched and tempered materials.
7. A travelling wheel mechanism with automatic lifting function for a rail car according to any one of claims 1-3, characterized in that: the travelling wheel mechanism adopts N sets of symmetrical layout on the track trolley, and N is an even number greater than or equal to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711387343.8A CN108099934B (en) | 2017-12-20 | 2017-12-20 | Travelling wheel mechanism with automatic lifting function for track trolley |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711387343.8A CN108099934B (en) | 2017-12-20 | 2017-12-20 | Travelling wheel mechanism with automatic lifting function for track trolley |
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| CN108099934A CN108099934A (en) | 2018-06-01 |
| CN108099934B true CN108099934B (en) | 2023-12-19 |
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| CN201711387343.8A Active CN108099934B (en) | 2017-12-20 | 2017-12-20 | Travelling wheel mechanism with automatic lifting function for track trolley |
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| CN112067328B (en) * | 2020-08-25 | 2022-07-05 | 华南农业大学 | Protection device for agricultural machinery field soil tank test trolley |
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|---|---|
| CN108099934A (en) | 2018-06-01 |
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