CN113803463B - Planetary gearbox gear shifting and auxiliary braking device for coal mine explosion-proof vehicle - Google Patents

Planetary gearbox gear shifting and auxiliary braking device for coal mine explosion-proof vehicle Download PDF

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Publication number
CN113803463B
CN113803463B CN202110988934.0A CN202110988934A CN113803463B CN 113803463 B CN113803463 B CN 113803463B CN 202110988934 A CN202110988934 A CN 202110988934A CN 113803463 B CN113803463 B CN 113803463B
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China
Prior art keywords
gear shifting
gearbox
shifting
gear
unloading
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CN202110988934.0A
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CN113803463A (en
Inventor
赵海兴
赵辉斌
代立明
惠忠文
赵鹏程
马天洲
范三程
李宝修
长丹华
李建新
高春
刘霄龙
李瑞平
刘雄
李志�
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Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
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Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
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Application filed by Taiyuan Institute of China Coal Technology and Engineering Group, Shanxi Tiandi Coal Mining Machinery Co Ltd filed Critical Taiyuan Institute of China Coal Technology and Engineering Group
Priority to CN202110988934.0A priority Critical patent/CN113803463B/en
Publication of CN113803463A publication Critical patent/CN113803463A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/04—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

The invention belongs to the technical field of gearbox parts and operation thereof, and particularly relates to a gear shifting and auxiliary braking device for a planetary gearbox of an explosion-proof vehicle for a coal mine. The planetary gearbox, the oil pump and the main valve block are integrated into a whole, and the oil pump, the gear shifting device and the unloading device are all arranged in a gearbox body. For the gear shifting part, one end of the gear shifting fixing shaft is fixed inside the gearbox, the other end of the gear shifting fixing shaft extends out of the gearbox through a side face hole of the gearbox, and the shaft end extending out of the gearbox is connected with a cab operating handle through a gear shifting crank and a gear shifting pull wire. For the unloading part, an unloading shifting sheet arranged on a gear shifting fixed shaft in the box body is led out of the box body through an unloading pull wire through a hole at the bottom of the box body on the same side as the unloading handle and is connected to a pedal brake pedal, so that the auxiliary braking function of the vehicle is realized. The structure is characterized in that the gear shifting and auxiliary braking mechanism of the gearbox is compact in arrangement, space is saved, and the operation is flexible and convenient.

Description

Planetary gearbox gear shifting and auxiliary braking device for coal mine explosion-proof vehicle
Technical Field
The invention belongs to the technical field of gearbox parts and operation thereof, and particularly relates to a gear shifting and auxiliary braking device for a planetary gearbox of a coal mine explosion-proof vehicle.
Background
Modern automobile transmission is divided into manual and automatic gear transmission from the mode of shifting gears, and automatic gear transmission can shift gears according to the speed of a motor vehicle automatically, is suitable for the operating mode that road conditions are smooth, and the distance of traveling is long, and the vehicle operates steadily. The underground coal mine has complex road conditions, uneven road surface, softness, wet and slippery road surface and large gradient, so that the gear of the vehicle can be adjusted at any time according to the road conditions so as to adjust the speed of the vehicle. The dynamic property of the vehicle is increased, and the oil consumption and the cost of the whole vehicle are reduced. Therefore, the manual transmission is commonly adopted by the coal mine explosion-proof vehicle.
The manual gear transmission of the coal mine explosion-proof vehicle basically operates the transmission through mechanical or hydraulic-mechanical combined control to realize the gear switching of the transmission. The function of the gear shifting device is realized mainly by uniformly coordinating a gear, a piston and a friction plate of a gearbox body, a main control valve which is internally or externally arranged on the gearbox, an oil suction pump which is arranged outside a gearbox body and a mechanical mechanism which controls the position of a valve core of a main valve block outside the gearbox body. The gearbox control mechanism is complicated, and the occupied space is large in the arrangement of the whole vehicle. For vehicles with narrow underground roadways and smaller required overall dimensions, the transmission box with the structure is not suitable.
Disclosure of Invention
In order to solve the problems, the invention provides a gear shifting and auxiliary braking device for a planetary gearbox of an explosion-proof vehicle for a coal mine.
The invention adopts the following technical scheme: a gear shifting and auxiliary braking device of a planetary gearbox of an explosion-proof vehicle for a coal mine comprises a gearbox, wherein a gear control valve, an oil pump main valve block and a planetary gearbox body gear are arranged in the gearbox, a gear shifting guide rod is arranged in a channel of the gear control valve and the oil pump main valve block, the gear shifting guide rod is arranged in a gear shifting guide rod guide groove on a gearbox shell, a gear shifting fixture block guide groove is arranged at the end part of the gear shifting guide rod, a fixture block is embedded in the gear shifting fixture block guide groove, the fixture block is arranged on a gear shifting plectrum, the gear shifting plectrum is arranged on a gear shifting fixed shaft, the end part of the gear shifting fixed shaft is connected with a handle transition driving lever, the handle transition driving lever is connected with a gear shifting handle through a gear shifting pull wire, a plurality of sawtooth-shaped teeth are processed at the middle bottom part of the gear shifting plectrum, the number of the teeth is the same as that of gears of the gearbox, the gear shifting plectrum is sleeved on the gear shifting fixed shaft and is in interference fit with the gear shifting fixed shaft, and rotates along with the rotation of the gear shifting fixed shaft, and a sawtooth-shaped rack of the gear shifting plectrum is meshed with a small pin shaft fixed at the bottom of a gearbox body; shift and be connected with the driving lever on the plectrum, the tip cover of driving lever has the spring, the one end of spring is fixed by installing the rand on the driving lever, the other end is fixed by the guide block of driving lever end installation, is provided with the arc chamfer on the guide block outer lane, the axle tip top position of gearbox install the card, the card is fixed in on the gearbox through the card pivot, the arc chamfer and the contact of card one side of guide block are connected, the card corresponds the contact position and is provided with the chamfer equally, the card bottom is provided with the tooth, the removal of guide block drives the card and rotates downwards, the tooth on the card keeps off the gear engagement with P in the planet gearbox body gear.
The gear shifting mechanism comprises a gear shifting fixed shaft, a gear shifting block and a gear shifting block, and is characterized by further comprising a brake pedal and a gear shifting block unloading pull wire, wherein the brake pedal is connected with one end of the gear shifting block unloading pull wire, the other end of the gear shifting block unloading pull wire is of a cylindrical structure, the cylindrical structure is clamped into a cylindrical groove corresponding to the unloading shifting block, the unloading shifting block is sleeved on the gear shifting fixed shaft in a clearance fit mode, the gear shifting block unloading pull wire is controlled to rotate around the gear shifting fixed shaft, a fixed reset spring clamping ring is arranged on the gear shifting fixed shaft, one end of an unloading shifting block reset spring is fixedly connected in a clamping groove of the fixed reset spring clamping ring, the other end of the unloading shifting block reset spring is fixed in a clamping groove of the unloading shifting block, the unloading shifting block is of a cam mechanism, and the unloading shifting block is in contact connection with an unloading valve rod of an oil pump main valve block.
Furthermore, one end of the gear shifting fixed shaft, which extends out of the gear box body, is of a cylindrical structure with two flattened ends, the shape of the handle transition driving lever is matched with the gear shifting fixed shaft, the gear shifting fixed shaft is controlled to rotate axially, and the handle transition driving lever and the gear shifting fixed shaft are locked through a nut and an elastic pad.
Furthermore, the guide groove of the gear shifting guide rod is a rectangular groove machined in the moving direction of the gear shifting guide rod on the valve body, and the gear shifting guide rod can move back and forth in the guide groove so as to control the switching of gears.
Furthermore, the shifting sheet and the shifting sheet limiting sleeve are welded into an integral structure, and are positioned integrally with the shifting fixed shaft through the locking pin and rotate together with the shifting fixed shaft.
Compared with the prior art, the invention has the following beneficial effects:
in the aspect of braking of vehicles, wheel-side wet braking is mostly adopted, and braking is realized by controlling the pressure of liquid in the wheel-side wet braking through a pedal brake pedal. In the planetary gear box, an auxiliary braking device for coordinately controlling the braking system and the transmission system is added. The power output from the torque converter to the gearbox is cut off while braking, and the stress of a transmission element part is improved. The function is realized mainly by the coordination action of an unloading shifting piece, an unloading pull wire, an unloading valve rod in an oil pump main valve block, a gear of a gearbox body, a piston and a friction plate which are additionally arranged in the gearbox.
The planetary gearbox is characterized in that an oil pump and a main valve block are integrated into a whole, and the oil pump, a gear shifting device and an unloading device are arranged in a gearbox body. For the gear shifting part, one end of the gear shifting fixing shaft is fixed inside the gearbox, the other end of the gear shifting fixing shaft extends out of the gearbox through a side face hole of the gearbox, and the shaft end extending out of the gearbox is connected with a cab operating handle through a gear shifting crank and a gear shifting pull wire. For the unloading part, an unloading shifting sheet arranged on a gear shifting fixed shaft in the box body is led out of the box body through an unloading pull wire through a hole at the bottom of the box body on the same side as the unloading handle and is connected to a pedal brake pedal, so that the auxiliary braking function of the vehicle is realized. The structure is characterized in that the gear shifting and auxiliary braking mechanism of the gearbox is compact in arrangement, space is saved, and the operation is flexible and convenient.
Drawings
FIG. 1 is a general diagram of transmission shifting and auxiliary braking;
FIG. 2 is a view of the engagement of the main valve block spool and the shift paddle after the oil pan is removed;
FIG. 3 is a top view of the transmission sump and valve block removed;
FIG. 4 is a detailed connection diagram of the shift paddle, the paddle guide pin and the shift lever;
FIG. 5 is a view of the engagement of the unloading valve rod and the unloading shifting piece of the main valve block;
FIG. 6 is a diagram of the position of the auxiliary brake unloading pull wire of the transmission;
FIG. 7 is an assembly view of a main valve block, a gear engaging guide rod and an unloading valve rod of the oil pump;
FIG. 8 is a P range lock position;
FIG. 9 is an enlarged view of the card position;
FIG. 10 is a view of the P-gear disengaged position;
FIG. 11 is a little pin shaft engagement view of the shift paddle, paddle guide pin;
in the figure, 1-gearbox, 2-brake pedal, 3-gear-shifting handle, 4-gear-shifting pulling wire, 5-gearbox unloading pulling wire, 6-handle transition pulling rod, 7-oil pan, 8-stop, 9-card, 10-P gear, 11-pulling rod limit block, 12-gear control valve, 13-oil pump main valve block, 14-gear-shifting guide rod, 15-oil suction port, 16-unloading valve rod, 17-unloading pulling rod, 18-gear-shifting pulling rod, 19-gear-shifting fixed shaft, 20-lock nut, 21-spring, 22-pulling rod, 23-pulling rod guide pin, 24-unloading pulling rod return spring, 25-unloading pulling wire, 26-pulling rod limit sleeve, 27-lock pin, 28-retainer ring, 29-guide block, 30-gear-shifting guide rod guide groove, 31-small pin shaft, 32-gear-shifting guide groove, 33-lock nut, 34-spring pad, 35-return spring retainer ring, 36-retainer ring card, 37-retainer ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The utility model provides a colliery explosion-proof vehicle planetary gearbox shifts and auxiliary brake device, including gearbox 1, gearbox 1 in be provided with gear control valve 12, oil pump main valve piece 13 and planetary gearbox body gear, be provided with in the passageway of gear control valve 12 and oil pump main valve piece 13 and shift guide rod 14, shift guide rod 14 sets up in the guide rod guide slot 30 of shifting on the gearbox 1 casing, shift guide rod 14's tip is provided with the fixture block guide slot 32 of shifting, the fixture block 37 is inlayed to the fixture block guide slot 32 of shifting, fixture block 37 is installed on the plectrum 18 of shifting, the plectrum 18 of shifting is installed on the fixed axle 19 of shifting, the tip and the handle transition driving lever 6 of the fixed axle 19 of shifting are connected, handle transition driving lever 6 is connected with the handle 3 of shifting through shifting act as go-between 4. As shown in fig. 10, a plurality of saw-tooth-shaped teeth are processed at the bottom of the shift paddle 18, the number of teeth is the same as the number of gears of the gearbox, the shift paddle 18 is sleeved on the shift fixed shaft 19 and is in interference fit with the shift fixed shaft 19, and rotates along with the rotation of the shift fixed shaft 19, and the saw-tooth-shaped rack of the shift paddle 18 is meshed with a small pin 31 on a paddle guide pin 23 fixed at the bottom of the gearbox housing; shift plectrum 18 on be connected with driving lever 22, the tip cover of driving lever 22 has spring 21, spring 21's one end is fixed by the rand 28 of installing on driving lever 22, the other end is fixed by the guide block 29 of 22 end installations of driving lever, be provided with the arc chamfer on the guide block 29 outer lane, the axle head portion top position of gearbox install card 9, card 9 is fixed in on the gearbox through card pivot 36, the arc chamfer and the contact of card 9 one side of guide block 29 are connected, card 9 corresponds the contact site and is provided with the chamfer equally, card 9 bottom is provided with the rodent, the removal of guide block 29 drives card 9 and rotates downwards, the rodent on the card 9 keeps off the gear engagement with the P in the planet gearbox body gear.
The auxiliary braking system comprises a brake pedal 2 and a gearbox unloading stay wire 5, wherein the brake pedal 2 is connected with one end of the gearbox unloading stay wire 5, the other end of the gearbox unloading stay wire 5 is of a cylindrical structure, the cylindrical structure is clamped into a cylindrical groove corresponding to an unloading shifting piece 17, the unloading shifting piece 17 is sleeved on a shifting fixed shaft 19 and is in clearance fit with the shifting fixed shaft 19, the gearbox unloading stay wire 5 is controlled to rotate around the shifting fixed shaft 19, the shifting fixed shaft 19 is provided with a fixed reset spring clamping ring 35, one end of an unloading shifting piece reset spring 24 is fixedly connected in a clamping groove of the fixed reset spring clamping ring 35, the other end of the unloading shifting piece reset spring 24 is fixed in a clamping groove of the unloading shifting piece 17, the unloading shifting piece 17 is a cam mechanism, and the unloading shifting piece 17 is in contact connection with an unloading valve rod 16 of an oil pump main valve block 13.
And (3) realizing a gear shifting function:
the output of the control gear extends out of the gearbox body through the gear shifting fixing shaft 19, the gear shifting crank 6 is sleeved on the gear shifting fixing shaft 19, one end, extending out of the gearbox body, of the gear shifting fixing shaft 19 is of a cylindrical structure with two flattened ends, the handle transition deflector rod 6 is matched with the handle transition deflector rod in shape to control the axial rotation of the handle transition deflector rod, and the handle transition deflector rod and the gear shifting fixing shaft are locked through nuts and elastic gaskets. One end of a shifting stay wire 4 is connected to a shifting crank 6, the other end of the shifting stay wire is connected with a shifting handle 3, when shifting, the shifting handle 3 is operated, the shifting stay wire 4 is shifted, the shifting crank 6 drives a shifting fixing shaft 19 to rotate, the shifting fixing shaft 19 drives a shifting plectrum 18 arranged in a gearbox to act, a fixture block 37 is arranged on the shifting plectrum 18, the fixture block 37 is embedded in a shifting fixture block guide groove 32 of a shifting guide rod 14, the shifting guide rod 14 is driven by the shifting plectrum 18 to reciprocate along the shifting guide rod guide groove 30 according to the gear position to be adjusted, so that the shifting guide rod 14 is adjusted on an oil pump main valve block 13, the channel position in the gear control valve 12 is further used for adjusting the meshing of a planetary gearbox body gear, and the switching of gears is realized.
The gear shifting guide rod guide groove 30 is a rectangular groove machined in the valve body in the moving direction of the gear shifting guide rod 14, and an inner plate of the gear shifting guide groove 32 at the front end of the gear shifting guide rod 14 is a positioning plate for positioning the width position of the gear shifting guide rod in the guide groove.
A section of the gear shifting plectrum 18 is processed with a sawtooth-shaped rack, and the tooth number of the rack is determined according to the gear set on the gearbox. If the gearbox has 1, 2, 3, D, N, R and P gears, the number of teeth of the rack is seven, and the gear shifting position is sensed by meshing the teeth of the rack with a small pin shaft 31 of a plectrum guide pin 23 fixed at the bottom of a gearbox body. The small pin shaft and the shifting piece guide pin are of a fixed structure, and the shaft cannot rotate. The paddle guide pin is fixed to the transmission case by a bolt 33 and a washer 34.
On the premise of ensuring the strength, the gear shifting plectrum 18 has the appearance that the gear shifting plectrum is not interfered with a main valve block when rotating for gear shifting, and when rotating to a P gear, the gear shifting plectrum is in plane contact with the edge of a gearbox, and the rotation of the gear shifting plectrum is locked. The shift shifting sheet 18 and the shift plate limiting sleeve 26 are welded into a whole structure, and are positioned into a whole with the shift fixing shaft 19 through the locking pin 27 and rotate together with the shift fixing shaft 19.
The control of the gear P of the gearbox is realized by the linkage of a gear shifting handle 3, a gear shifting stay wire 4, a gear shifting crank 6, a gear shifting plectrum 18, a plectrum guide pin 23, a shifting rod 22 fixed on the gear shifting plectrum 18, a spring 21 on the shifting rod, a shifting rod limiting block 11, a clamping piece 9, a gear 10 of the gear P of the planetary gearbox, a gear engaging guide rod 14 arranged on an oil cylinder main valve block 13 and the like.
The lever 22 is spring-loaded, one end is held by a collar mounted on the lever 22, and the other end is held by a guide block 29 mounted near the end of the lever near the P-range gear 10.
When the shift handle is shifted to a P-gear position, the positioning of the shift handle is realized by rotating the shift plectrum 18 in the figure 4 to the plane of the gearbox body to block the shift plectrum from rotating, and simultaneously, the tooth socket corresponding to the P-gear on the shift plectrum and the small pin shaft on the plectrum guide pin are blocked to be in a P-gear positioning standard. The end of the transmission shaft is embodied in such a manner that a single tooth on the card 9 is engaged with the P-range gear 10, and the P-range gear is locked to stop the rotation of the vehicle, so that the vehicle is stopped.
The connection between the shift lever 22 and the shift finger 18 is interference fit, and the shift lever is locked by a nut after connection, so that the relative movement between the pull rod and the shift finger is prevented.
The card 9 is fixed on the gear box through a card rotating shaft 36, so that the card can rotate up and down around the card rotating shaft, and a blocking piece is fixed on the card to ensure the axial positioning of the card.
The guide block 29 mounted on the shift lever 22 is tapered at an end adjacent to the P-gear so that the compression spring 21 easily extends the guide block 29 out along with the shift lever 22 when shifting the P-gear, thereby rotating the card 9 downward about the card rotating shaft 36 to engage with the P-gear. Because when the shift lever 18 rotates, the shift lever 22 extends to the P-gear and moves upwards, the shift lever limiting block 11 is fixed on the gearbox, and the upward movement of the shift lever limiting block is restrained.
When the gear P is changed into other gears, the gear shifting piece 18 is rotated leftwards, the shifting rod 22 retracts, the clamping piece 9 automatically resets, a single tooth on the clamping piece is disengaged from the gear P10, and the gear P can continuously rotate along with the gearbox shaft to complete the switching of each gear.
And (3) realizing an auxiliary braking function:
the brake unloading device is arranged in the planetary gearbox body, the unloading of the vehicle is controlled through the coordinated action of the unloading valve rod 16 of the oil pump main valve block 13 arranged in the gearbox, the brake pedal 2 and the built-in gear of the gearbox, and the power transmission of the hydraulic torque converter and the gearbox is cut off, so that the auxiliary braking is realized.
The brake unloading device consists of an unloading shifting sheet 17 and an unloading pull wire 5.
The unloading shifting piece 17 is positioned by a gear shifting fixed shaft 19, an unloading shifting piece return spring 24 and a fixed return spring retainer ring 35. One end of the reset spring is fixed in a clamping groove of the clamping ring 35, and the clamping ring 35 is fixed on the gear shifting fixing shaft. The other end is fixed in the clamping groove of the unloading shifting piece 17. The unloading shifting piece 17 is sleeved on the gear shifting fixed shaft 19 and is in clearance fit with the gear shifting fixed shaft 19, the unloading shifting piece is controlled by the gear box unloading pull wire 5 to rotate around the gear shifting fixed shaft 19, and the reset spring 24 controls the reset of the unloading shifting piece 17.
Half of the unloading shifting sheet 17 is a cam sheet mechanism, the shape of the cam is designed according to the position control flow of the valve rod of the main valve block of the oil pump, and the other half is a thick structure, so that the end of the pull wire needs to be reserved and clamped into a cylindrical groove of a cylinder and a pull wire groove, and the structure is a semi-circular arc structure.
One end of the unloading pull wire is a cylinder, the cylinder is clamped into a cylindrical groove of the unloading shifting sheet, the pull wire is clamped into a pull wire groove of the unloading shifting sheet, and the pull wire penetrates out of the box body through a pore channel at the bottom of the speed changing box body on the same side with the gear shifting mechanism shaft and is linked with a brake pedal. The stay wire exposed outside the box body is protected by a rubber sleeve. When unloading is needed, the brake pedal 2 is stepped on, the unloading pull wire 5 drives the unloading shifting sheet to rotate around the gear shifting fixed shaft 19, and the unloading shifting sheet 17 is in a cam mechanism form, so that the telescopic position of an unloading valve rod of an oil pump main valve block is controlled along with the different rotating positions of the cam mechanism to control the unloading flow, and the engagement of shafts of a hydraulic torque converter and a gearbox is controlled. When unloading is not needed, the brake pedal 2 is released, and the return spring 24 drives the unloading shifting piece 19 to return to the original position.

Claims (5)

1. The utility model provides a colliery explosion-proof vehicle planetary gearbox shifts and auxiliary brake device, includes gearbox (1), gearbox (1) in be provided with gear control valve (12), oil pump main valve piece (13) and planetary gearbox body gear, its characterized in that: a gear shifting guide rod (14) is arranged in a channel of a gear control valve (12) and an oil pump main valve block (13), the gear shifting guide rod (14) is arranged in a gear shifting guide rod guide groove (30) on a shell of a gearbox (1), a gear shifting fixture block guide groove (32) is arranged at the end part of the gear shifting guide rod (14), a fixture block (37) is embedded in the gear shifting fixture block guide groove (32), the fixture block (37) is arranged on a gear shifting plectrum (18), the gear shifting plectrum (18) is arranged on a gear shifting fixed shaft (19), the end part of the gear shifting fixed shaft (19) is connected with a handle transition driving lever (6), the handle transition driving lever (6) is connected with a gear shifting handle (3) through a gear shifting pull wire (4), a plurality of sawtooth-shaped teeth are processed at the bottom part of the gear shifting plectrum (18), the number of the teeth is the same as that of gears of the gearbox, the gear shifting plectrum (18) is sleeved on the gear shifting fixed shaft (19) and is in interference fit with the gear shifting fixed shaft (19), and rotates along with a small guide pin (31) fixed on the bottom of a gearbox box body; shift and dial piece (18) on be connected with driving lever (22), the tip cover of driving lever (22) has spring (21), the one end of spring (21) is fixed by rand (28) of installing on driving lever (22), the other end is fixed by deflector block (29) of driving lever (22) end installation, be provided with the arc chamfer on deflector block (29) outer lane, the axle head top position of gearbox install card (9), card (9) are fixed in on the gearbox through card pivot (36), the arc chamfer and card (9) one side contact of deflector block (29) are connected, card (9) correspond the contact position and are provided with the chamfer equally, card (9) bottom is provided with the rodent, the removal of deflector block (29) drives card (9) and rotates downwards, the rodent on card (9) keeps off the gear engagement with the P in the planet gearbox body gear.
2. The planetary gearbox gear shifting and auxiliary braking device for coal mine explosion-proof vehicles according to claim 1, characterized in that: the unloading pull wire device is characterized by further comprising a brake pedal (2) and a gearbox unloading pull wire (5), wherein the brake pedal (2) is connected with one end of the gearbox unloading pull wire (5), the other end of the gearbox unloading pull wire (5) is of a cylinder structure, the cylinder is clamped into a cylindrical groove corresponding to the unloading pull sheet (17), the unloading pull sheet (17) is sleeved on a shifting fixed shaft (19) and is in clearance fit with the shifting fixed shaft (19), the gearbox unloading pull wire (5) controls the shifting pull wire to rotate around the shifting fixed shaft (19), the shifting fixed shaft (19) is provided with a fixed reset spring clamping ring (35), the clamping groove of the fixed reset spring clamping ring (35) is fixedly connected with one end of an unloading pull sheet reset spring (24), the other end of the unloading pull sheet reset spring (24) is fixed in the clamping groove of the unloading pull sheet (17), the unloading pull sheet (17) is a cam mechanism, and the unloading pull sheet (17) is in contact connection with an unloading valve rod (16) of an oil pump main valve block (13).
3. The planetary gearbox gear-shifting and auxiliary braking device for coal mine explosion-proof vehicles as claimed in claim 1 or 2, characterized in that: one end of the gear shifting fixed shaft (19) extending out of the gear box body is of a cylindrical structure with two flattened ends, the handle transition deflector rod (6) is matched with the gear shifting fixed shaft in shape, the gear shifting fixed shaft (19) is controlled to rotate axially, and the handle transition deflector rod (6) and the gear shifting fixed shaft are locked through a nut and an elastic pad.
4. The planetary gearbox shifting and auxiliary braking device for coal mine explosion-proof vehicles as claimed in claim 3, characterized in that: the gear shifting guide rod guide groove (30) is a rectangular groove machined in the valve body in the moving direction of the gear shifting guide rod (14), and the gear shifting guide rod can move back and forth in the guide groove so as to control gear shifting.
5. The planetary gearbox shifting and auxiliary braking device for coal mine explosion-proof vehicles as claimed in claim 4, characterized in that: the gear shifting sheet (18) and the shifting sheet limiting sleeve (26) are welded into an integral structure, and are positioned integrally with the gear shifting fixed shaft (19) through the locking pin (27) and rotate together with the gear shifting fixed shaft (19).
CN202110988934.0A 2021-08-26 2021-08-26 Planetary gearbox gear shifting and auxiliary braking device for coal mine explosion-proof vehicle Active CN113803463B (en)

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Application Number Priority Date Filing Date Title
CN202110988934.0A CN113803463B (en) 2021-08-26 2021-08-26 Planetary gearbox gear shifting and auxiliary braking device for coal mine explosion-proof vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110988934.0A CN113803463B (en) 2021-08-26 2021-08-26 Planetary gearbox gear shifting and auxiliary braking device for coal mine explosion-proof vehicle

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CN105626845A (en) * 2014-10-29 2016-06-01 陕西重型汽车有限公司 Electric-pneumatic compound control transmission operating device and method and commercial vehicle
CN110360316A (en) * 2018-04-11 2019-10-22 上海汽车集团股份有限公司 A kind of gearbox and its automatic parking executive device
CN209762213U (en) * 2019-03-29 2019-12-10 连云港天明装备有限公司 Mining vehicle gearshift

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KR20130083754A (en) * 2012-01-13 2013-07-23 현대위아 주식회사 Parking device for electrical vehicle
CN202812156U (en) * 2012-08-16 2013-03-20 梧州山王拖拉机制造有限公司 Tractor flexible shaft shift operating mechanism
CN105626845A (en) * 2014-10-29 2016-06-01 陕西重型汽车有限公司 Electric-pneumatic compound control transmission operating device and method and commercial vehicle
CN110360316A (en) * 2018-04-11 2019-10-22 上海汽车集团股份有限公司 A kind of gearbox and its automatic parking executive device
CN209762213U (en) * 2019-03-29 2019-12-10 连云港天明装备有限公司 Mining vehicle gearshift

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