CN210338084U

CN210338084U - Front-rear four-wheel drive tractor with cab turnover function

Info

Publication number: CN210338084U
Application number: CN201921063498.0U
Authority: CN
Inventors: 李文华; 黄军业; 卢广伟; 苏家森; 黄志国; 覃绍宇; 宋宗泽; 李业明
Original assignee: GUANGXI HEPU COUNTY HUILAIBAO MACHINERY MANUFACTURING CO LTD
Current assignee: GUANGXI HEPU COUNTY HUILAIBAO MACHINERY MANUFACTURING CO LTD
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-04-17
Anticipated expiration: 2029-07-09

Abstract

The utility model belongs to the technical field of the transport machinery technique and specifically relates to a four wheel drive tractor around can of taking driver's cabin upset function mainly comprises diesel engine, clutch, driver's cabin, variable speed transfer case assembly, hydraulic pressure hasp, rear wheel, hand pump, driver's cabin upset hydro-cylinder, front wheel, back frame, preceding frame, safety switch, assembly, the hydraulic pressure pipe of acting as go-between. The front end of the cab is provided with a cab turning upper seat, the front end of the rear frame is provided with a cab turning lower seat, a cab turning pin penetrates between the cab turning upper seat and the cab turning lower seat, and a cab turning oil cylinder is further arranged between the cab and the rear frame. The utility model discloses alleviate the maintenance intensity of labour of tractor, improved the driving safety nature, improved and produced the property ability.

Description

Front-rear four-wheel drive tractor with cab turnover function

Technical Field

The utility model belongs to the technical field of the transport machinery, especially, relate to a four wheel drive tractor around can of taking driver's cabin upset function.

Background

Chinese patent publication No. 204432393U discloses a tractor (patent No. ZL 201520051258.4) capable of four-wheel drive front and rear, which mainly comprises an engine, a cab, a clutch assembly, a belt, a front frame and a rear frame, wherein the front frame and the rear frame are connected to form a whole through a traction system. The utility model discloses a four wheel drive around can realizing, can realize using different drive mode under different road conditions, reach and reduce the energy consumption, rational distribution power, climbing ability is strong to safe and reliable's purpose.

Meanwhile, the tractor capable of driving the front and rear four wheels, which adopts the above technology, is difficult to maintain the chassis due to the obstruction of the cab because the cab assembly is fixed on the rear frame assembly by bolts. Therefore, the tractor capable of being driven by four wheels front and back needs to be technically upgraded, the cab assembly of the tractor is designed to be of a turnover structure, when the chassis needs to be maintained, the rear end of the cab is lifted up through the turnover mechanism, a certain included angle is formed between the cab and the chassis, and a certain space is created so that a maintenance worker can conveniently enter the upper portion of the chassis to maintain the chassis. After the maintenance is accomplished, through tilting mechanism can be quick with the driver's cabin upset return, alleviate intensity of labour to ensure that the driver's cabin installation is firm, guarantee the safety of traveling, and then improve the market competition of product and have positive meaning.

Disclosure of Invention

The utility model aims at providing a four wheel drive tractor around taking driver's cabin upset function, overcome the current four wheel drive tractor around can arouse the inconvenient not enough of tractor chassis maintenance because of the hindrance of driver's cabin.

The technical scheme for solving the technical problems is as follows: a tractor with a cab turning function and capable of driving four wheels forwards and backwards mainly comprises a diesel engine, a clutch, a cab, a speed change transfer case assembly, a hydraulic lock catch, a rear wheel, a manual pump, a cab turning oil cylinder, a front wheel, a rear frame, a front frame, a safety switch, a pull wire assembly, a hydraulic pipe and the like. The diesel engine and the clutch are respectively arranged on the front frame, the front wheel is arranged on the front axle, and the front axle is arranged on the front frame. The speed change transfer case assembly, the cab and the carriage are arranged on the rear frame, the rear wheels are arranged on the rear axle, and the rear axle is arranged on the rear frame. The front frame and the rear frame are connected into a whole through a traction system. The power output shaft of the clutch is connected with the power input shaft of the speed change transfer case assembly through the front transmission shaft. The front axle power input shaft is connected with a front power output shaft of the speed change transfer case assembly through an intermediate transmission shaft. The power input shaft of the rear axle is connected with the rear power output shaft of the speed change transfer case assembly through a rear transmission shaft.

The power transmission route of the tractor adopting the technical scheme is as follows: the power of the diesel engine is transmitted to the clutch through the belt, then transmitted to the speed change transfer case assembly through the front transmission shaft, and transmitted to the rear axle through the rear transmission shaft after speed change and power distribution through the speed change transfer case assembly so as to drive the rear wheels to walk. Meanwhile, after reaching the speed change transfer case assembly, the power can be transmitted to a front axle through an intermediate transmission shaft according to requirements so as to drive front wheels to walk, and front and rear four-wheel drive is realized.

In order to realize the function that the cab can be overturned, the front end of the cab is provided with a cab overturning upper seat, the front end of the rear frame is provided with a cab overturning lower seat, and a cab overturning pin penetrates between the cab overturning upper seat and the cab overturning lower seat. The cab turnover upper seat and the cab turnover lower seat can rotate around the cab turnover pin to form a certain angle, namely the cab can rotate around the cab turnover pin to form a certain angle with the rear frame. A cab overturning oil cylinder is further installed between the cab and the rear frame, and when the cab overturning oil cylinder pushes a cab overturning oil cylinder piston to extend out when hydraulic oil, the cab can be overturned around a cab overturning pin.

In order to prevent the cab from overturning beyond the designed angle, a cab overturning limiting chain is connected between the cab and the rear frame. In order to ensure the safety of the cab during maintenance operation after the cab is turned over and prevent accidents caused by sudden drop of the cab, a safety switch is also designed and installed on the cab turning oil cylinder. In order to ensure that the cab is stably fixed on the rear frame when the tractor runs, a cab fixing lock catch is designed and installed between the rear end of the cab and the rear frame.

Adopt above-mentioned measure the utility model discloses, when four wheel drive around the tractor more enough realized, the upset can be realized round driver's cabin upset round pin under the effect of driver's cabin upset hydro-cylinder to have the safety switch and prevent that the driver's cabin from descends suddenly and cause the incident. Have the spacing chain of driver's cabin upset simultaneously and prevent that the driver's cabin upset from surpassing spacing angle. Have the fixed hasp of driver's cabin, can prevent to arouse the driver's cabin shake in the tractor operation process on can fixing the firm back frame of driver's cabin. Technical scheme more than adopting the utility model discloses to the maintenance of tractor, alleviate intensity of labour, improve driving safety nature, improve and produce the property ability, and then improve the market competition of product and have positive meaning.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the installation position of the cab tilting member;

FIG. 3 is a schematic view of a cab in a tilted state;

FIG. 4 is a schematic view of a cab in a home position;

FIG. 5 is a schematic view of a manual pump;

FIG. 6 is a schematic view of a cab tilt cylinder;

FIG. 7 is a schematic view of the hydraulic lock in an open state;

fig. 8 is a schematic view of the closed state of the hydraulic latch.

Description of reference numerals: 1. a diesel engine; 2. a clutch; 3. a front drive shaft; 4. a cab; 5. a variable speed transfer case assembly; 6. a cab fixing buckle; 7. hydraulic locking; 701. a hydraulic locking oil pipe interface; 702. a hydraulic lock catch oil cylinder; 703. a hydraulic lock catch oil cylinder piston; 704. a hydraulic latch tumbler; 8. a carriage; 9. a rear wheel; 10. a rear drive shaft; 11. a manual pump; 1101. oil filler caps (intake and exhaust plugs); 1102. a hydraulic oil storage tank; 1103. a rocker; 1104. a piston and a piston rod; 1105. a hydraulic compression chamber; 1106. an oil inlet one-way valve is arranged in the compression chamber; 1107. an oil outlet one-way valve of the compression chamber; 1108. an oil pipe interface of a manual pump; 1109. a reversing handle; 1110. an oil drain piston; 1111. an oil return passage; 12. an intermediate transmission shaft; 13. a cab tilting cylinder; 1301. a cab tilting cylinder piston; 1302. an oil pipe interface of a cab turnover oil cylinder; 14. the cab overturns the lower seat; 15. a front wheel; 16. the cab is overturned to limit the chain; 17. a rear frame; 18. a cab roll-over pin; 19. a front frame; 20. the cab is overturned to be seated; 21. a safety switch; 2101. a safety switch return spring; 2102. a safety switch return spring seat; 22. a pull wire assembly; 2201. a stay wire core; 23. a hydraulic tube; 24. a four-way joint.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the diesel engine 1 and the clutch 2 are mounted on a front frame 19, the front wheel 15 is mounted on a front axle, and the front axle is mounted on the front frame 19. The transfer case assembly 5, the cab 4 and the compartment 8 are mounted on a rear frame 17, the rear wheels 9 are mounted on a rear axle, and the rear axle is mounted on the rear frame 17. The front frame 19 and the rear frame 17 are connected into a whole through a traction system. The power output shaft of the clutch 2 is connected with the power input shaft of the speed change transfer case assembly 5 through the front transmission shaft 3. The front axle power input shaft is connected with the front power output shaft of the speed change transfer case assembly 5 through an intermediate transmission shaft 12. The power input shaft of the rear wheel 9 is connected with the rear power output shaft of the speed change transfer case assembly 5 through a rear transmission shaft 10.

The power transmission route of the tractor adopting the technical scheme is as follows: the power of the diesel engine 1 is transmitted to the clutch 2 through a belt, then transmitted to the speed change transfer case assembly 5 through the front transmission shaft 3, and transmitted to the rear axle through the rear transmission shaft 10 after being subjected to speed change and power distribution through the speed change transfer case assembly 5 so as to drive the rear wheels 9 to walk. Meanwhile, after reaching the speed change transfer case assembly 5, the power can be transmitted to a front axle through the intermediate transmission shaft 12 according to requirements so as to drive the front wheels 15 to walk, and front and rear four-wheel drive is realized.

As shown in fig. 2 and 6, in order to realize the function of allowing the cab 4 to be tilted, an upper cab-tilting seat 20 is mounted on a lower front end portion of the cab 4, a lower cab-tilting seat 14 is mounted on an upper front end portion of the rear frame 17, and a cab-tilting pin 18 is inserted between the upper cab-tilting seat 20 and the lower cab-tilting seat 14. The cab-roll upper seat 20 and the cab-roll lower seat 14 can rotate around the cab-roll pin 18 to form a certain angle, that is, the cab 4 can rotate around the cab-roll pin 18 to form an angle of 0-45 degrees with the rear frame 17. A cab tilting cylinder 13 is further installed between the cab 4 and the rear frame 17, and when the cab tilting cylinder 13 pushes the cab tilting cylinder piston 1301 to extend, the cab 4 can be tilted around the cab tilting pin 18.

In order to prevent the overturning of the cab 4 from exceeding the designed angle, a cab overturning limiting chain 16 is further connected between the cab 4 and the rear frame 17, the length of the cab overturning limiting chain 16 can ensure that the cab 4 is pulled when the cab 4 is overturned to the maximum angle, the cab 4 is prevented from overturning beyond the designed range, and further, parts are damaged or safety accidents are caused. When the cab 4 needs to be returned, the cab turnover limiting chain 16 does not influence the return of the cab 4. In order to ensure the safety of the cab 4 during maintenance after overturning and prevent accidents caused by sudden descending of the cab 4, a safety switch 21 is also designed and installed on the cab overturning oil cylinder 13.

As shown in fig. 3, 4, 5, 6, 7, and 8, the manual pump 11 is designed with a filler cap (inlet/outlet plug) 1101, and the filler cap (inlet/outlet plug) 1101 is screwed off to facilitate the supply of hydraulic oil to the manual pump 11. The filler cap (inlet and outlet plugs) 1101 also functions as a vent to ensure that the hydraulic reservoir 1102 is vented to atmosphere. The manual pump 11 is designed with a hydraulic oil storage tank 1102 and a hydraulic compression chamber 1105, a compression chamber oil inlet check valve 1106 is designed between the hydraulic oil storage tank 1102 and the hydraulic compression chamber 1105, and hydraulic oil can only flow from the hydraulic oil storage tank 1102 to the hydraulic compression chamber 1105 in one direction. The hydraulic compression chamber 1105 is provided with a piston and a piston rod 1104, the connecting rod part of the piston and the piston rod 1104 is connected to the middle position of the rocker 1103, and one end of the rocker 1103 is connected to the manual pump 11 through a pin shaft. The hydraulic compression chamber 1105 is provided with an oil outlet channel, the oil outlet channel is respectively provided with a compression chamber oil outlet one-way valve 1107, a manual pump oil pipe interface 1108, an oil drain piston 1110 and an oil return channel 1111, wherein the compression chamber oil outlet one-way valve 1107 can ensure that hydraulic oil can only flow out to the oil outlet channel from the hydraulic compression chamber 1105 in one way. The manual pump oil pipe interface 1108 is connected with the hydraulic pipe 23, and the hydraulic pipe 23 is connected with one oil port of the four-way joint 24. The other port of the four-way joint 24 is connected with the hydraulic pipe 23 and then connected with the cab-roll-over cylinder oil pipe interface 1302 of the cab-roll-over cylinder 13. The cab-roll cylinder 13 is designed with a cab-roll cylinder piston 1301 mounted. Cab tilt cylinder piston 1301 is connected to cab 4. The cab turnover oil cylinder piston 1301 is provided with a ratchet, the cab turnover oil cylinder 13 is provided with a safety switch 21, the safety switch 21 comprises a safety switch return spring 2101 and a safety switch return spring seat 2102, and the safety switch 21 is clamped on the ratchet of the cab turnover oil cylinder piston 1301 under the action of the elastic force of the safety switch return spring 2101 to prevent the cab turnover oil cylinder piston 1301 from retracting into the cab turnover oil cylinder 13 under the decompression state of the cab turnover oil cylinder 13.

The safety switch 21 is connected with one end of a pull wire core 2201. The pull wire core 2201 is sleeved in the middle of the sleeve of the pull wire assembly 22, and the pull wire core 2201 can move in the pull wire assembly 22.

The oil drain piston 1110 and the oil return channel 1111 of the oil outlet channel are communicated with the hydraulic oil storage tank 1102, one end of the oil drain piston 1110 is connected with a reversing handle 1109, the other end of the oil drain piston 1110 is connected with the other end of the stay wire core 2201, and the oil drain piston 1110 can close or open the oil return channel under the pushing or pulling action of the reversing handle 1109.

In order to ensure that the cab 4 is stably fixed on the rear frame 17 when the tractor runs, the cab fixing buckles 6 are respectively arranged on the left side and the right side of the rear end of the cab 4, the hydraulic lock catches 7 are respectively arranged on the left side and the right side of the rear frame 17 at the positions corresponding to the cab fixing buckles 6, and the cab fixing buckles 6 can be firmly buckled by the hydraulic lock catches 7. The hydraulic lock 7 is provided with a hydraulic lock cylinder 702, a hydraulic lock cylinder piston 703 is arranged in the hydraulic lock cylinder 702, and a hydraulic lock oil pipe connector 701 is arranged at the lower part of the hydraulic lock cylinder 702. The hydraulic lock oil pipe connectors 701 of the left and right hydraulic locks 7 on the rear frame 17 are respectively connected with the other two oil ports of the four-way joint 24 through hydraulic pipes 23.

The hydraulic latch rotating arm 704 is mounted on the hydraulic latch 7, and when hydraulic oil enters the hydraulic latch cylinder 702, the hydraulic latch cylinder piston 703 is pushed to move upward, and the hydraulic latch rotating arm 704 is further pushed to rotate.

The working process principle of the cab in the overturning state is shown in fig. 3, 5, 6 and 7: when the cab 4 needs to be turned over, the rocker 1103 of the manual pump 11 is manually operated to move up and down, so that the piston and the piston rod 1104 are driven to move up and down, when hydraulic oil moves upwards on the piston and the piston rod 1104, the hydraulic compression chamber 1105 forms negative pressure, and the hydraulic oil overcomes the elastic force of the oil inlet check valve 1106 spring of the compression chamber under the action of atmospheric pressure and enters the hydraulic compression chamber 1105 from the hydraulic oil storage tank 1102. When the piston and the piston rod 1104 move downward, the hydraulic oil forms a certain pressure under the pressure of the piston and the piston rod 1104, and overcomes the elastic force of the spring of the oil outlet check valve 107 of the compression chamber to enter the oil pipe interface 1108 of the manual pump. At this time, the oil drain piston 1110 is in a state of closing the oil return passage. Therefore, hydraulic oil reaches the four-way joint 24 through the hydraulic pipe 23, and a part of the hydraulic oil enters the hydraulic latching cylinder 702 through the hydraulic pipe 23 and further through the hydraulic latching oil pipe connector 701, and pushes the hydraulic latching cylinder piston 703 to move upward, so as to drive the hydraulic latching rotating arm 704 to rotate clockwise. The hydraulic latch 7 is in an open state. The cab anchor stud 6 disengages the hydraulic latch 7.

Another portion of the hydraulic oil passes through the hydraulic pipe 23 to the cab-roll-over-cylinder pipe connection 1302 and enters the cab-roll-over-cylinder 13, thereby pushing the cab-roll-over-cylinder piston 1301 to move upward, and further pushing the cab 4 to roll over around the cab-roll-over-pin 18. At this time, the safety switch 21 is locked on the ratchet of the cab-tilting cylinder piston 1301 under the spring force of the safety switch return spring 2101, so that accidents caused by accidental retraction of the cab-tilting cylinder piston 1301 are prevented.

When the cab 4 is turned to a set angle, the cab turning limiting chain 16 extends to the maximum size, the cab 4 is pulled, and the turning is prevented from exceeding the designed angle range.

After the cab 4 is turned over, a certain included angle is formed between the cab 4 and the rear frame 17, and a certain space is created to facilitate maintenance personnel to enter the upper part of the chassis to maintain the chassis.

The working process principle of the cab return state is shown in fig. 4, 5, 6 and 7: when the cab 4 needs to return, the reversing handle 1109 is manually operated to be pulled out, the oil drain piston 1110 opens an oil return channel under the action of the reversing handle 1109, and a part of hydraulic oil flows back to the hydraulic oil storage tank 1102 from the cab reversing oil cylinder 13 through the cab reversing oil cylinder oil pipe interface 1302, the hydraulic pipe 23, the four-way joint 24, the manual pump oil pipe interface 1108 and the oil return channel 1111. The other part of the hydraulic oil flows back to the hydraulic oil storage tank 1102 from the hydraulic latching oil cylinder 702 through the hydraulic latching oil pipe connector 701, the hydraulic pipe 23, the four-way joint 24, the manual pump oil pipe connector 1108 and the oil return channel 1111.

At the same time, due to the pulling-out of the manual control reversing handle 1109, the pull wire core 2201 moves in the pull wire assembly 22, and further the safety switch 21 is pulled to overcome the elastic force of the safety switch return spring 2101, and the safety switch 21 leaves the ratchet of the cab tilting cylinder piston 1301. Due to the combined effect of the hydraulic oil return hydraulic reservoir tank 1102 inside the cab tilt cylinder 13 and the safety switch 21 leaving the ratchet of the cab tilt cylinder piston 1301, the cab 4 compresses the cab tilt cylinder piston 1301 under the effect of its own gravity, thereby causing the cab tilt cylinder piston 1301 to retract into the cab tilt cylinder 13. The cab 4 is returned.

When cab 4 is returned to its position, hydraulic oil has returned to hydraulic reservoir 1102 from hydraulic latch cylinder 702. The hydraulic latch ram piston 703 retracts the hydraulic latch ram 702 under the force of gravity. The hydraulic lock catch rotating arm 704 is in a free downward swinging state under the action of gravity, the cab fixing buckle 6 enters the hydraulic lock catch 7, and the cab fixing buckle 6 is locked by the hydraulic lock catch rotating arm 704, so that the cab 4 is stably fixed on the rear frame 17 when the tractor runs.

The utility model has the advantages that: the cab turnover function is realized, the maintenance of the tractor is facilitated, the labor intensity is reduced, the driving safety is improved, the product performance is improved, and the market competitiveness of the product is further improved.

Claims

1. The utility model provides a four wheel drive tractor around taking driver's cabin upset function, includes diesel engine, clutch, driver's cabin, variable speed transfer case assembly, hydraulic pressure hasp, rear wheel, hand pump, driver's cabin upset hydro-cylinder, front wheel, rear truck frame, preceding frame, safety switch, assembly, the hydraulic pressure pipe of acting as go-between, its characterized in that: the diesel engine (1) and the clutch (2) are respectively arranged on a front frame (19), the front wheel (15) is arranged on a front axle, and the front axle is arranged on the front frame (19); the speed change transfer case assembly (5), the cab (4) and the carriage (8) are arranged on a rear frame (17), the rear wheels (9) are arranged on a rear axle, and the rear axle is arranged on the rear frame (17); the front frame (19) and the rear frame (17) are connected into a whole through a traction system; the power output shaft of the clutch (2) is connected with the power input shaft of the speed change transfer case assembly (5) through the front transmission shaft (3); the front axle power input shaft is connected with a front power output shaft of the speed change transfer case assembly (5) through an intermediate transmission shaft (12); the power input shaft of the rear wheel (9) is connected with the rear power output shaft of the speed-changing transfer case assembly (5) through a rear transmission shaft (10).

2. The tractor with cab tilting function as claimed in claim 1, wherein: a cab turning upper seat (20) is arranged at the lower part of the front end of the cab (4), a cab turning lower seat (14) is arranged at the upper part of the front end of the rear frame (17), and a cab turning pin (18) penetrates between the cab turning upper seat (20) and the cab turning lower seat (14); a cab turning limiting chain (16) is connected between the cab (4) and the rear frame (17), and a safety switch (21) is arranged on the cab turning oil cylinder (13).

3. The tractor with cab tilting function as claimed in claim 2, wherein: a cab turnover oil cylinder piston (1301) is arranged on the cab turnover oil cylinder (13), the cab turnover oil cylinder piston (1301) is connected with a cab (4), and a ratchet is designed on the cab turnover oil cylinder piston (1301).

4. The tractor with cab tilting function as claimed in claim 2, wherein: the safety switch (21) is clamped on a ratchet of a piston (1301) of a cab tilting oil cylinder under the action of the elastic force of a safety switch return spring (2101), and the safety switch (21) is connected with one end of a stay wire core (2201); the stay wire core (2201) is sleeved in the middle of the pipe sleeve of the stay wire assembly (22).

5. The tractor with cab tilting function as claimed in claim 2, wherein: cab fixing buckles (6) are respectively arranged on the left side and the right side of the rear end of the cab (4), and hydraulic lock catches (7) are respectively arranged on the left side and the right side of the rear frame (17) at positions corresponding to the cab fixing buckles (6); the hydraulic lock catch (7) is provided with a hydraulic lock catch oil cylinder (702), a hydraulic lock catch oil cylinder piston (703) is arranged inside the hydraulic lock catch oil cylinder (702), and the lower part of the hydraulic lock catch oil cylinder (702) is provided with a hydraulic lock catch oil pipe interface (701).