A full-hydraulic control carriage back door vertical lifting device of a mine trackless rubber-tyred vehicle

Abstract

This invention relates to the field of transportation vehicle technology, and more particularly to a fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle. The device includes a vehicle body with a protective mechanism installed on it. The protective mechanism includes telescopic sleeves symmetrically fixedly installed at the front of the vehicle body. A hydraulic cylinder is installed inside the telescopic sleeve, with the piston end of the hydraulic cylinder fixedly connected to the inner wall of the telescopic end of the telescopic sleeve. By providing a protective mechanism that covers the hydraulic cylinder with a telescopic sleeve, this invention can initially prevent dirt formed by solid particles and moisture in the mine tunnel from contacting the hydraulic cylinder, thus avoiding contamination and emulsification of the hydraulic oil. Furthermore, by providing a drive mechanism, the device can control the rotation of a special-shaped ring while the door is closed, allowing the scraper to further remove dirt from the outer wall of the telescopic end of the telescopic sleeve and the outer wall of the sealing sleeve, preventing moisture inside the telescopic sleeve from causing emulsification of the hydraulic oil in the hydraulic cylinder.

Description

Technical Field

[0001] This invention relates to the field of transportation vehicle technology, and in particular to a fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle. Background Technology

[0002] Trackless rubber-tired mining vehicles have outstanding advantages in mining transportation, with their high-efficiency transportation capacity being particularly prominent. They can easily handle slopes, water-hardened surfaces, and narrow mine roads, ensuring the production efficiency and ore extraction speed of the mine. In coal mine roadways with limited cross-section and narrow space, there is often not enough space at the rear and sides of the vehicle for traditional doors to be fully opened. By changing the door from opening from the left and right to opening from the top and bottom, the vehicle can be parked and operated under more demanding roadway conditions.

[0003] Due to the harsh underground environment, extremely high concentrations of dust and solid particles can easily enter the hydraulic oil through the vent holes and piston rod seals of the hydraulic system. This can lead to abrasive wear on the oil pump, hydraulic valve core, and hydraulic cylinder inner wall, resulting in decreased precision, increased internal leakage, unstable system pressure, and water entering the hydraulic oil, causing emulsification, a sharp decline in lubrication performance, corrosion of metal components, and accelerated oil oxidation and deterioration. Therefore, the protection of the hydraulic system has become an urgent problem to be solved. Summary of the Invention

[0004] To overcome the drawback of dust, solid particles, and moisture easily penetrating the hydraulic system, this invention provides a fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle.

[0005] The technical solution is as follows: A fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle includes a car body. A protective mechanism is installed on the car body, comprising telescopic sleeves symmetrically fixedly installed at the front of the car body. A hydraulic cylinder is installed inside each telescopic sleeve, with the piston end of the hydraulic cylinder fixedly connected to the inner wall of the telescopic end of the telescopic sleeve. Door panels are fixedly connected to the telescopic ends of the two telescopic sleeves via the same lifting frame. The door panels are slidably installed through the car body. A shaped ring is rotatably sleeved on the outer wall of the fixed end of each telescopic sleeve. A drive mechanism for controlling the movement of the shaped ring is installed on the telescopic sleeve. A sealing sleeve and multiple scrapers arranged in a ring are fixedly connected inside the shaped ring. The sealing sleeve is movably sleeved on the telescopic end of the telescopic sleeve, and the scrapers are in contact with the telescopic end of the telescopic sleeve.

[0006] Preferably, the driving mechanism includes a fixed ring fixedly sleeved on the fixed end of the telescopic sleeve, a spool rotatably connected to the top of the fixed ring, the spool rotatably sleeved on the fixed end of the telescopic sleeve and unidirectionally rotatably connected to the irregular ring, a coil spring between the spool and the fixed ring, sliders symmetrically slidably connected to the carriage, a pull rope wound around the spool connected to the slider, and a connecting rod hinged between the slider and the lifting frame.

[0007] Preferably, the device also includes a drying mechanism disposed on the telescopic sleeve, the drying mechanism comprising a sponge ring slidably sleeved on the telescopic end of the telescopic sleeve.

[0008] Preferably, the drying mechanism further includes an air guide frame fixed inside the fixed end of the telescopic sleeve, the air guide frame being slidably sleeved on the telescopic end of the telescopic sleeve, the sponge ring being disposed inside the air guide frame, an air pump being installed inside the carriage, the air pump being connected to an air guide pipe that passes through the carriage and the fixed end of the telescopic sleeve and is connected to the air guide frame, and a through hole being provided through the air guide frame.

[0009] Preferably, the telescopic sleeve has a first circular hole and a second circular hole through its outer wall at the telescopic end, and a first sealing plate is slidably connected inside the first circular hole.

[0010] Preferably, a bracket is fixedly connected to the inner wall of the telescopic end of the telescopic sleeve, and an elastic sliding column is slidably connected inside the bracket, with the first sealing plate fixedly connected to the elastic sliding column.

[0011] Preferably, a second sealing plate is slidably connected inside the second circular hole.

[0012] Preferably, a slide rod is fixedly connected to the second sealing plate, and a support plate is fixedly connected to the second circular hole. The slide rod and the support plate are slidably connected through each other, and a compression spring is provided between the slide rod and the support plate. A one-way valve is connected to the fixed end of the telescopic sleeve.

[0013] Preferably, the door panel has an irregularly shaped groove, and a reinforcing plate is elastically slidably connected inside the groove. The carriage has a slot that matches the reinforcing plate.

[0014] Preferably, the upper side of the lifting frame is provided with a drive plate, and the bottom of the drive plate is symmetrically fixed with an extrusion block that slides through the lifting frame and is located in the irregular groove.

[0015] The beneficial effects of this invention are:

[0016] 1. By setting up a protective mechanism, the present invention covers the hydraulic cylinder with a telescopic sleeve, which can initially prevent dirt formed by solid particles and moisture in the mine tunnel from coming into contact with the hydraulic cylinder, and avoid the hydraulic oil of the hydraulic cylinder from being contaminated and emulsified. By setting up a drive mechanism, the irregular ring can be controlled to rotate while the door panel is closed, so that the scraper can further scrape off the dirt on the outer wall of the telescopic end of the telescopic sleeve and the outer wall of the sealing sleeve, and prevent the hydraulic oil of the hydraulic cylinder from emulsifying due to the moisture in the inner cavity of the telescopic sleeve.

[0017] 2. The present invention, through the design of the sponge ring, can wipe away the moisture adhering to the outer wall of the telescopic end of the telescopic sleeve when the door panel is closed. By allowing dry air to flow along the air guide frame, not only can the sponge ring be kept dry, but the inner cavity of the telescopic sleeve can also be further dried. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the protective mechanism of the present invention;

[0020] Figure 3 This is a schematic diagram of the installation of the scraper in this invention;

[0021] Figure 4 This is a schematic diagram of the installation of the sealing sleeve of the present invention;

[0022] Figure 5 This is a schematic diagram of the drive mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the installation at the reel of the present invention;

[0024] Figure 7 This is a schematic diagram of the installation of the sponge ring in this invention;

[0025] Figure 8 This is a schematic diagram of the air guide frame of the present invention;

[0026] Figure 9 This is a schematic diagram of the installation of the air pump in this invention;

[0027] Figure 10 This is a schematic diagram of the installation at the first sealing plate of the present invention;

[0028] Figure 11 This is a schematic diagram of the installation of the second sealing plate of the present invention;

[0029] Figure 12 This is a schematic diagram of the installation of the reinforcing plate in this invention;

[0030] Figure 13 This is a schematic diagram of the installation of the extrusion block in this invention.

[0031] Explanation of reference numerals in the attached drawings: 1_carriage, 201_telescopic sleeve, 202_hydraulic cylinder, 203_lifting frame, 204_door panel, 205_irregular ring, 206_sealing sleeve, 207_scraper, 301_fixed ring, 302_thread wheel, 303_slider, 304_connecting rod, 401_sponge ring, 501_air guide frame, 502_air pump, 503_air guide pipe, 504_through hole, 601_first sealing plate, 701_bracket, 702_elastic sliding column, 801_second sealing plate, 901_sliding rod, 902_support plate, 903_one-way valve, 1001_reinforcing plate, 1101_drive plate, 1102_extrusion block. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] A fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle, such as... Figures 1-3 As shown, the system includes a carriage 1, on which a protective mechanism is installed. The protective mechanism includes telescopic sleeves 201 symmetrically fixedly installed at the front of the carriage 1. A hydraulic cylinder 202 is installed inside each telescopic sleeve 201. The piston end of the hydraulic cylinder 202 is fixedly connected to the inner wall of the telescopic end of the telescopic sleeve 201. Door panels 204 are fixedly connected to the telescopic ends of the two telescopic sleeves 201 via the same lifting frame 203. The door panels 204 are slidably installed inside the carriage 1. A shaped ring 205 is rotatably fitted onto the outer wall of the fixed end of each telescopic sleeve 201. A drive mechanism for controlling the movement of the irregular ring 205 is installed on 201. A sealing sleeve 206 and four scrapers 207 arranged in a ring are fixed inside the irregular ring 205. The sealing sleeve 206 is movably sleeved on the telescopic end of the telescopic sleeve 201. By controlling the rotation of the irregular ring 205 through the drive mechanism, the scrapers 207 can clean the dirt on the outer wall of the telescopic end of the telescopic sleeve 201 and the sealing sleeve 206, preventing water from entering the inner cavity of the telescopic sleeve 201. The scrapers 207 are in contact with the telescopic end of the telescopic sleeve 201.

[0034] like Figure 5 and Figure 6 As shown, the driving mechanism includes a fixed ring 301 fixedly sleeved on the fixed end of the telescopic sleeve 201. A spool 302 is rotatably connected to the top of the fixed ring 301. The spool 302 is rotatably sleeved on the fixed end of the telescopic sleeve 201 and is unidirectionally rotatably connected to the bottom end of the irregular ring 205. A coil spring is provided between the spool 302 and the fixed ring 301. A slider 303 is symmetrically slidably connected to the carriage 1. A pull rope wound on the spool 302 is connected to the slider 303. A connecting rod 304 is hinged between the slider 303 and the lifting frame 203. When the telescopic end of the telescopic sleeve 201 retracts, the spool 302 can drive the irregular ring 205 to rotate.

[0035] Initially, door panel 204 is closed, sealing the carriage 1. The coil spring is in a stored state. When door panel 204 needs to be opened, the piston end of hydraulic cylinder 202 extends, causing the telescopic ends of telescopic sleeves 201 to extend. The telescopic ends of the two telescopic sleeves 201, via lifting frame 203, lift door panel 204, opening it. Simultaneously, lifting frame 203 moves two connecting rods 304, causing slider 303 to slide forward. The coil spring releases energy, causing pulley 302 to rotate, winding the pull rope. At this time, the telescopic ends of telescopic sleeves 201 are exposed inside the mine tunnel. Solid particles and moisture in the tunnel mix to form dirt that adheres to the outer wall of the telescopic ends of telescopic sleeves 201. When door panel 204 needs to be closed, the piston end of hydraulic cylinder 202 retracts, causing the telescopic ends of telescopic sleeves 201 to retract. The telescopic end of 01 drives the door panel 204 to descend via the lifting frame 203. The sealing sleeve 206 scrapes away the dirt adhering to the outer wall of the telescopic end of the telescopic sleeve 201. The dirt gradually accumulates on the outer wall of the sealing sleeve 206. At the same time, the lifting frame 203 drives the two connecting rods 304 to move. The connecting rods 304 drive the slider 303 to slide backward. The slider 303 pulls the pull rope, which gradually releases from the pull wheel 302 and pulls the pull wheel 302 to rotate. The coil spring gradually stores energy and drives the irregular ring 205 to rotate. The irregular ring 205 drives the four scrapers 207 inside it to move. The scrapers 207 further scrape away the dirt on the outer wall of the telescopic end of the telescopic sleeve 201 and the outer wall of the sealing sleeve 206, preventing the moisture in the dirt from accumulating at the joint between the sealing sleeve 206 and the outer wall of the telescopic end of the telescopic sleeve 201 and gradually seeping into the fixed end of the telescopic sleeve 201. This avoids the inner cavity of the telescopic sleeve 201 becoming damp, which would cause the hydraulic oil in the hydraulic cylinder 202 to emulsify.

[0036] like Figure 7 As shown, it also includes a drying mechanism disposed on the telescopic sleeve 201. The drying mechanism includes a sponge ring 401 slidably sleeved on the telescopic end of the telescopic sleeve 201. The sponge ring 401 is used to wipe the outer wall of the telescopic end of the telescopic sleeve 201.

[0037] like Figures 7-9 As shown, the drying mechanism also includes an air guide frame 501 fixedly connected to the fixed end of the telescopic sleeve 201. The air guide frame 501 is slidably sleeved on the telescopic end of the telescopic sleeve 201. A sponge ring 401 is disposed inside the air guide frame 501. An air pump 502 is installed inside the carriage 1. The air guide frame 501 is used to guide the dry air blown out by the air pump 502. An air guide pipe 503 is connected to the air pump 502, which passes through the carriage 1 and the fixed end of the telescopic sleeve 201 and is connected to the air guide frame 501. A through hole 504 is provided through the air guide frame 501.

[0038] like Figure 10As shown, the upper and lower parts of the telescopic end outer wall of the telescopic sleeve 201 are respectively provided with a first circular hole and a second circular hole. A first sealing plate 601 is slidably connected in the first circular hole. When the first sealing plate 601 is aligned with the connection between the air guide pipe 503 and the air guide frame 501, dry air can enter the telescopic end of the telescopic sleeve 201 through the first circular hole.

[0039] like Figure 10 As shown, a bracket 701 is fixedly connected to the inner wall of the telescopic end of the telescopic sleeve 201, and an elastic sliding column 702 is slidably connected inside the bracket 701. The first sealing plate 601 is fixedly connected to one side of the elastic sliding column 702. By setting the elastic sliding column 702, when the telescopic end of the telescopic sleeve 201 extends, the first sealing plate 601 can block the first round hole.

[0040] like Figure 11 As shown, a second sealing plate 801 is slidably connected inside the second circular hole. By setting the first sealing plate 601 and the second sealing plate 801, the inner cavity of the telescopic end of the telescopic sleeve 201 can be isolated from the inner cavity of the fixed end, preventing condensation from forming in the inner cavity of the telescopic end of the telescopic sleeve 201.

[0041] like Figure 12 As shown, a slide rod 901 is fixedly connected to the second sealing plate 801, and a support plate 902 is fixedly connected to the second circular hole. The slide rod 901 and the support plate 902 are slidably connected through each other, and a compression spring is provided between the slide rod 901 and the support plate 902. When the dry air blown out by the air pump 502 impacts the second sealing plate 801, it can make the second sealing plate 801 move. A one-way valve 903 is connected to the fixed end of the telescopic sleeve 201.

[0042] Initially, the compression spring is in the released state. The first sealing plate 601 and the second sealing plate 801 respectively seal the first and second circular holes at the telescopic end of the telescopic sleeve 201. When the telescopic end of the telescopic sleeve 201 is in the retracted state, the fixed end of the telescopic sleeve 201 forms the first layer of protection for the hydraulic cylinder 202. The telescopic end of the telescopic sleeve 201, the first sealing plate 601, and the second sealing plate 801 form the second layer of protection for the hydraulic cylinder 202. When the telescopic end of the telescopic sleeve 201 extends, the first sealing plate 601 is exposed in the mine tunnel. Solid particles and moisture in the mine tunnel mix to form dirt that adheres to the first sealing plate 601. When the telescopic end of the telescopic sleeve 201 retracts, the first sealing plate 601 can be cleaned by the sealing sleeve 206 and the scraper 207. After the sealing sleeve 206 and the scraper 207 clean the telescopic end of the telescopic sleeve 201, the telescopic sleeve 201 and... Moisture may remain on the outer wall of the first sealing plate 601. The sponge ring 401 can wipe the telescopic end of the telescopic sleeve 201 and the outer wall of the first sealing plate 601, further preventing moisture from entering the inner cavity of the telescopic sleeve 201 along with the telescopic end of the telescopic sleeve 201 and the first sealing plate 601. When the piston end of the hydraulic cylinder 202 retracts, the air pump 502 blows out dry air. The dry air enters the air guide frame 501 through the air guide pipe 503 and flows along the air guide frame 501 in the sponge ring 401, keeping the sponge ring 401 dry and ensuring the wiping effect of the sponge ring 401. Subsequently, the dry air enters the inner cavity of the telescopic sleeve 201 through the through hole 504 of the air guide frame 501 and is discharged through the one-way valve 903. By making the dry air flow in the inner cavity of the telescopic sleeve 201, the inner cavity of the telescopic sleeve 201 can be kept dry to prevent moisture from mixing with the hydraulic oil of the hydraulic cylinder 202 and causing hydraulic oil emulsification.

[0043] It is worth noting that when transport vehicles remain in the mine tunnel for an extended period, due to the humid environment, even when the telescopic sleeve 201 is in a retracted state, a large amount of condensation will still form inside the telescopic sleeve 201. At this time, the first sealing plate 601 aligns with the connection between the air guide pipe 503 and the air guide frame 501, and the air pump 502 blows out dry air. After the dry air enters the air guide frame 501, it impacts the first sealing plate 601. The first sealing plate 601, under pressure, causes the elastic sliding column 702 to elastically contract and slide. Subsequently, the first sealing plate 601 disengages from the first circular hole, and the dry air enters the telescopic end of the telescopic sleeve 201 through the first circular hole and flows downwards along the telescopic end of the telescopic sleeve 201. The air flows, and then the dry air impacts the second sealing plate 801. The second sealing plate 801 is forced to slide the slide rod 901, and the compression spring is stretched. Then the second sealing plate 801 disengages from the second round hole, and the dry air enters the fixed end of the telescopic sleeve 201 through the second round hole and is discharged through the one-way valve 903. This further ensures that the inner cavity of the telescopic sleeve 201 remains dry. Then the air pump 502 is controlled to stop blowing out dry air, and the first sealing plate 601 and the second sealing plate 801 are no longer impacted. The elastic slide rod 702 elastically releases and slides back to reset, causing the first sealing plate 601 to move back to reset. The compression spring is released and drives the second sealing plate 801 to move back to reset through the slide rod 901.

[0044] like Figure 12 and Figure 13 As shown, a shaped groove is provided on the door panel 204, and a reinforcing plate 1001 is elastically slidably connected in the groove along the front-back direction. A slot matching the reinforcing plate 1001 is provided on the carriage 1. When the reinforcing plate 1001 is inserted into the slot, it can provide support for the carriage 1.

[0045] like Figure 12 and Figure 13 As shown, a drive plate 1101 is provided on the upper side of the lifting frame 203. A pressing block 1102 is symmetrically fixed to the bottom of the drive plate 1101, which slides through the lifting frame 203 and is located in the irregular groove. When the drive plate 1101 is subjected to downward pressure, the reinforcing plate 1001 can be inserted into the slot.

[0046] Initially, the reinforcing plate 1001 is completely retracted into the irregular groove of the door panel 204, and the door panel 204 can be raised and lowered at will. There is a gap between the bottom of the drive plate 1101 and the top of the lifting frame 203. When the mine tunnel collapses, the collapsed object falls onto the drive plate 1101. The drive plate 1101 falls downward due to its weight, and drives the two pressing blocks 1102 to move downward. The two pressing blocks 1102 together press the edge of the reinforcing plate 1001. The reinforcing plate 1001 is elastically extended backward under force and slides into the slot of the carriage 1, thereby providing support for the rear end of the carriage 1 and further ensuring the safety of the carriage 1.

[0047] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A full hydraulic control vertical lifting device for the rear door of the carriage of a mine-used trackless rubber-tyred vehicle, comprising a carriage (1), characterized in that: The carriage (1) is equipped with a protective mechanism, which includes telescopic sleeves (201) symmetrically fixedly installed at the front of the carriage (1). A hydraulic cylinder (202) is installed inside the telescopic sleeve (201). The piston end of the hydraulic cylinder (202) is fixedly connected to the inner wall of the telescopic end of the telescopic sleeve (201). The telescopic ends of the two telescopic sleeves (201) are fixedly connected to a door panel (204) through the same lifting frame (203). The door panel (204) is slidably installed through the carriage (1). Inside the telescopic sleeve (201), a shaped ring (205) is rotatably sleeved on the outer wall of the fixed end. A drive mechanism for controlling the movement of the shaped ring (205) is installed on the telescopic sleeve (201). A sealing sleeve (206) and a plurality of scrapers (207) arranged in a ring are fixedly connected inside the shaped ring (205). The sealing sleeve (206) is movably sleeved on the telescopic end of the telescopic sleeve (201). The scrapers (207) are in contact with the telescopic end of the telescopic sleeve (201). The driving mechanism includes a fixed ring (301) fixedly sleeved on the fixed end of the telescopic sleeve (201), a spool (302) rotatably connected to the top of the fixed ring (301), the spool (302) rotatably sleeved on the fixed end of the telescopic sleeve (201) and unidirectionally rotatably connected to the irregular ring (205), a coil spring is provided between the spool (302) and the fixed ring (301), a slider (303) is symmetrically slidably connected on the carriage (1), a pull rope is connected to the slider (303) and wound around the spool (302), and a connecting rod (304) is hinged between the slider (303) and the lifting frame (203). It also includes a drying mechanism disposed on the telescopic sleeve (201), the drying mechanism including a sponge ring (401) slidably sleeved on the telescopic end of the telescopic sleeve (201). The drying mechanism also includes an air guide frame (501) fixed in the fixed end of the telescopic sleeve (201). The air guide frame (501) is slidably sleeved on the telescopic end of the telescopic sleeve (201). The sponge ring (401) is located in the air guide frame (501). An air pump (502) is installed in the carriage (1). An air guide pipe (503) is connected to the air pump (502) through the carriage (1) and the fixed end of the telescopic sleeve (201) and through the air guide frame (501). A through hole (504) is opened through the air guide frame (501).

2. The fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle according to claim 1, characterized in that: The telescopic sleeve (201) has a first circular hole and a second circular hole through its outer wall at the telescopic end, and a first sealing plate (601) is slidably connected inside the first circular hole.

3. The fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle according to claim 2, characterized in that: The telescopic sleeve (201) has a bracket (701) fixedly connected to the inner wall of its telescopic end. An elastic sliding column (702) is slidably connected inside the bracket (701), and the first sealing plate (601) is fixedly connected to the elastic sliding column (702).

4. The fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle according to claim 2, characterized in that: A second sealing plate (801) is slidably connected inside the second circular hole.

5. The fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle according to claim 4, characterized in that: A slide rod (901) is fixedly connected to the second sealing plate (801), and a support plate (902) is fixedly connected to the second round hole. The slide rod (901) and the support plate (902) are slidably connected through each other, and a compression spring is provided between the slide rod (901) and the support plate (902). A one-way valve (903) is connected to the fixed end of the telescopic sleeve (201).

6. The fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle according to claim 1, characterized in that: The door panel (204) has an irregular groove, and a reinforcing plate (1001) is elastically slidably connected in the irregular groove. The carriage (1) has a slot that matches the reinforcing plate (1001).

7. The fully hydraulically controlled vertical lifting device for the rear door of a trackless rubber-tired mining vehicle according to claim 1, characterized in that: The upper side of the lifting frame (203) is provided with a drive plate (1101), and the bottom of the drive plate (1101) is symmetrically fixed with an extrusion block (1102) that slides through the lifting frame (203) and is located in the irregular groove.

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