CN114394557A - Electric carrying forklift - Google Patents
Electric carrying forklift Download PDFInfo
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- CN114394557A CN114394557A CN202111678805.8A CN202111678805A CN114394557A CN 114394557 A CN114394557 A CN 114394557A CN 202111678805 A CN202111678805 A CN 202111678805A CN 114394557 A CN114394557 A CN 114394557A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 description 12
- 230000000149 penetrating effect Effects 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 10
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07568—Steering arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/0759—Details of operating station, e.g. seats, levers, operator platforms, cabin suspension
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses an electric carrying forklift, which comprises a box body, a pallet fork, an operation and driving system, a hydraulic system and a synchronous connecting rod system, wherein the box body is fixedly arranged on the pallet fork, the hydraulic system acts on the box body and the pallet fork, the electric carrying forklift also comprises a side force avoiding multidirectional connector, the side force avoiding multidirectional connector is used for connecting the hydraulic system and the box body, a spherical cavity is arranged in the connector, the bottom surface of the spherical cavity is provided with a truncated cone-shaped cavity with a small upper part and a large lower part, the truncated cone-shaped cavity is upwards communicated with the spherical cavity and downwards communicated with the outside, namely, the lower half part of the spherical cavity is occupied by the truncated cone-shaped cavity, more than half of the remaining spherical cavity is arranged, the top of a piston rod of a hydraulic cylinder in the hydraulic system is fixedly provided with a sphere matched with the spherical cavity, the box body can swing around a sphere within a certain range through the truncated cone-shaped cavity, and compared with the piston rod is directly connected with the box body, the eccentric wear of the piston rod can be eliminated, and the performance reduction of the hydraulic cylinder is avoided.
Description
Technical Field
The invention relates to a forklift, in particular to an electric carrying forklift.
Background
The electric carrying forklift generally comprises a box body, a fork, an operation and running system, a hydraulic system and a synchronous connecting rod system, wherein the box body is fixedly arranged on one side of the fork close to the operation and running system, the hydraulic system is arranged on the operation and running system and acts on the box body and the fork, and the synchronous connecting rod system is connected with the operation and running system, the box body and two front wheels of the fork, so that the two front wheels of the fork keep in contact with the ground in the lifting process of the fork.
The existing electric carrying forklift is generally provided with a connecting block for connection at the rear side of a box body, and a piston rod of a hydraulic cylinder is fixedly connected with the connecting block, so that when the forklift is used, a heavy object is placed on a fork at the front side, the piston rod of the hydraulic cylinder is influenced by the weight unbalance loading of the front side, the piston rod is abraded due to unbalance loading, the performance of the hydraulic cylinder is reduced, the bearing capacity of the electric carrying forklift is directly influenced at last, and potential safety hazards are easy to exist when the electric carrying forklift is used.
Disclosure of Invention
The invention aims to provide an electric carrying forklift, which can solve the problems in the background art by designing a lateral force avoiding multidirectional connector and a corresponding mounting structure between a piston rod and a connecting block of a hydraulic cylinder.
The technical scheme for solving the technical problem is as follows: the design is kept away the multidirectional connector of side force for connect hydraulic system and box, its inside is provided with a spherical cavity, its bottom surface is provided with a big end down's round platform shape cavity, round platform shape cavity upwards communicates spherical cavity, it is external downwards to communicate, the piston rod top of the pneumatic cylinder in the pressure system sets firmly the spheroid of cooperation spherical cavity, through round platform shape cavity, make the box can round the centre of sphere, swing in certain extent, compare piston rod and box connection, the partial side wearing and tearing of piston rod can be eliminated, avoid pneumatic cylinder performance to descend.
The hydraulic fork type hydraulic cylinder comprises a box body, a fork, an operation and running system, a hydraulic system and a synchronous connecting rod system, wherein the box body is fixedly arranged on the fork, the hydraulic system acts on the box body and the fork, and the hydraulic fork type hydraulic cylinder is characterized by further comprising a side force avoiding multidirectional connector, the side force avoiding multidirectional connector is used for connecting the hydraulic system and the box body, a spherical cavity is arranged in the side force avoiding multidirectional connector, a truncated cone-shaped cavity with a small upper part and a large lower part is arranged on the bottom surface of the side force avoiding multidirectional connector, the truncated cone-shaped cavity is upwards communicated with the spherical cavity and downwards communicated with the outside, namely the part of the lower half part of the spherical cavity, occupied by the truncated cone-shaped cavity, of the remaining spherical cavity is larger than half, and a sphere matched with the spherical cavity is fixedly arranged at the top of a piston rod of a hydraulic cylinder in the hydraulic system.
The lateral force avoiding multidirectional connector comprises a first connecting block and a second connecting block, the first connecting block and the second connecting block are detachably connected, and a hemispherical cavity forming a spherical cavity and a semi-circular truncated cone cavity forming a circular truncated cone cavity are respectively arranged on the first connecting block and the second connecting block.
The connecting block I and the connecting block II are both in a step shape and comprise a middle part with a large diameter, an upper part with a small diameter and a lower part, the connecting block I and the connecting block II are further provided with four step through holes used for setting fasteners, the two step through holes are arranged in the upper part, the other two step through holes are arranged in the lower part, and the four step through holes are arranged in the outer sides of the hemispherical cavity and the semicircular cavity.
The step through holes comprise large holes and small holes, one large hole is in the shape of the hexagon of a nut in a matched fastener in two step through holes of the upper part of the connecting block I, the other large hole is in the shape of a circle of a bolt and a nut in a matched fastener, and the setting of the four step through holes of the connecting block II is completely the same as that of the connecting block I.
The box is provided with the cooperation and keeps away the mounting hole of side power multidirectional connector, the mounting hole is the step form, including less last hole, great intermediate hole, goes up the hole and is used for cooperating the upper portion of connecting block one), connecting block two, and intermediate hole inner wall is provided with the internal thread, is provided with the complex external screw thread on the intermediate portion of connecting block one, connecting block two.
The height of the middle hole is equal to the sum of the heights of the middle parts and the lower parts of the first connecting block and the second connecting block, after the lateral force avoiding multidirectional connector is screwed down with the mounting hole, the internal thread of the middle hole corresponding to the lower part is hollowed, and the hollowed internal thread is further in threaded connection with a reinforcing ring.
The mounting hole further comprises a largest lower hole, an annular groove is formed in the inner wall of the lower hole, and a locking plate is arranged in the annular groove.
The invention has the beneficial effects that: through round platform shape cavity for box connecting block, box and fork can swing in certain extent round the centre of sphere, eliminate the side wearing and tearing of piston rod, avoid pneumatic cylinder performance to descend, avoid electronic transport fork truck to have the potential safety hazard because the side wearing and tearing of pneumatic cylinder piston rod.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic view of a box portion.
Fig. 3 is a schematic view of a fork portion.
FIG. 4 is a schematic view of a steering and travel system.
Fig. 5 is a schematic diagram of a hydraulic system.
Fig. 6 is a schematic view of a synchronous linkage system.
FIG. 7 is a schematic view of the connection between the multidirectional connector and the mounting hole for avoiding the lateral force according to the first embodiment.
Fig. 8 is a schematic view of the connection of the lateral force preventing multidirectional connector and the ball.
Fig. 9 is a schematic view of the connection between the multidirectional connector and the mounting hole for avoiding the lateral force in the second embodiment.
Fig. 10 is a schematic view of the connection between the lateral force-avoiding multidirectional connector and the mounting hole in the third embodiment.
Fig. 11 is an enlarged view of part a.
Fig. 12 is a partial sectional view of the side force avoiding multidirectional connector and the mounting hole in the third embodiment.
Fig. 13 is an enlarged view of part B.
In the figure, 1, a box body; 101. an L-shaped plate; 102. two side plates; 103. a vertical plate; 104. connecting blocks; 1041. mounting holes; 10411. an upper hole; 10412. a middle hole; 10413. a lower hole; 10414. an annular groove; 105. a horizontal plate; 2. a pallet fork; 201. a load bearing bar; 202. a connecting strip; 203. penetrating out of the groove; 204. a first connecting lug; 231. a waist-shaped sheet I; 232. two waist-shaped pieces II; 233. two rolling wheels; 234. a pin shaft; 235. a third connecting lug; 3. a steering and travel system; 301. mounting a platform; 302. a rear wheel; 304. a housing; 305. a joystick; 4. a hydraulic system; 401. a hydraulic cylinder; 402. an oil tank; 403. an oil pump; 404. a diverter valve; 5. a synchronous linkage system; 501. a slide bar; 502. two swing strips; 503. a connecting shaft; 504. a first extension portion; 505. a second connecting lug; 6. a lateral force avoiding multidirectional connector; 61. a first connecting block; 62. a second connecting block; 603. a truncated cone shaped cavity; 631. a semi-circular cavity; 604. a spherical cavity; 641. a hemispherical cavity; 605. a stepped through hole; 71. a bolt; 72. a nut; 73. a reinforcing ring; 74. a locking plate.
Detailed Description
The invention is further illustrated below with reference to the figures and embodiments.
The first embodiment.
In fig. 1, an electric carrying forklift includes a box 1, a fork 2, a steering and traveling system 3, a hydraulic system 4, a synchronous link system 5, and a side-force avoiding multidirectional connector 6. The hydraulic system 4 is arranged on the control and running system 5, the box body 1 is fixedly arranged on one side of the fork 2 close to the control and running system 4, and the hydraulic system 4 is connected with the box body 1 through the side force avoiding multidirectional connector 6, namely the hydraulic system 4 acts on the box body 1 and the fork 2; the synchronous link system 5 is provided with connections on the two front wheels of the operating and traveling system 3, the box body 1 and the fork 2, so that the two front wheels of the fork 2 are kept in contact with the ground in the lifting process of the fork 2.
In fig. 2, the case 1 includes a large L-shaped plate 101, two side plates 102, a vertical plate 103, and a horizontal plate 105. The L-shaped plate 101 is in an inverted state and detachably connected to the two side plates 102. The vertical plate 103 is fixed to the vertical edge of the other side of the two side plates 102 in a welding manner, and a connecting block 104 is also fixed to the surface of the vertical plate 103 away from the two side plates 102 in a welding manner, and the connecting block 104 is used for subsequent connection with the hydraulic system 4. The horizontal plate 105 is welded and fixed between the two side plates 102, so that a cavity is formed among the horizontal plate 105, the two side plates 102, the L-shaped plate 101 and the vertical plate 103.
In fig. 3, 4 and 6, the pallet fork 2 comprises two load bearing bars 201, a connecting bar 202, two front wheel assemblies. The connecting bar 202 is welded and fixed between the two bearing bars 201 to form a concave whole. Two downward connecting lugs I204 are arranged at the positions, far away from the connecting strip 202, of the two bearing strips 201, and the two connecting lugs I204 are used for connecting a group of front wheel assemblies. The front wheel assembly includes two kidney-shaped panels one 231, two kidney-shaped panels two 232, and two rolling wheels 233 (i.e., the "two front wheels of the fork 2" mentioned above). One end of each of the two first waist-shaped pieces 231 is fixedly provided with the same pin shaft 234, and the two ends of the pin shaft 234 respectively penetrate through the two first waist-shaped pieces 231 and are used for being matched with the two first connecting lugs 204, so that the two first waist-shaped pieces 231 can swing around the pin shafts 234. The middle position of the two second waist-shaped pieces 232 is hinged with the other ends of the two first waist-shaped pieces 231, and the two rolling wheels 233 are respectively and rotatably connected with the end parts of the two second waist-shaped pieces 232 at the same side. In the case 1, the bottom surfaces of the L-shaped plate 101 and the two side plates 102 are located on the same plane, and the three bottom surfaces are welded and fixed to the two bearing strips 201 and the connecting strip 202, and the connecting block 104 is away from the rolling wheel 233.
In fig. 2 and 4, the steering and running system 3 includes a mounting platform 301, a joystick 305, a housing 304, and a pair of rear wheels 302. The housing 304 is fixedly arranged below the mounting platform 301, a motor for driving the rear wheel 302 is arranged in the housing 304, and a power supply 303 for supplying power to the motor is arranged in the cavity of the box body 1. An operating lever 305 is arranged above the mounting platform 301, on the one hand, the operating lever 305 being used to control the steering of the rear wheels 302, and on the other hand, the operating lever 305 being also used to control the subsequent hydraulic system 4.
In fig. 2 and 5, the hydraulic system 4 includes a hydraulic cylinder 401, a tank 402, an oil pump 403, and a direction change valve 404. The oil tank 402 is also placed in the chamber of the tank 1 described above, and the oil pump 403 and the selector valve 404 are both provided on the top surface of the oil tank 402. The oil is pumped by the oil pump 403, and the reversing valve 404 selects different stations to realize the lifting of the piston rod of the hydraulic cylinder 401. In addition, the piston rod of the hydraulic cylinder 401 is also connected to the connection block 104 through the side force avoiding multidirectional connector 6.
In fig. 8, the lateral force avoiding multidirectional connector 6 comprises a first connecting block 61 and a second connecting block 62, wherein the first connecting block 61 and the second connecting block 62 are detachably connected, and the two are combined to form the lateral force avoiding multidirectional connector 6. For the lateral force avoiding multidirectional connector 6, a spherical cavity 604 is arranged in the connector, and a truncated cone-shaped cavity 603 with a small upper part and a large lower part is arranged on the bottom surface of the connector. The truncated cone-shaped cavity 603 is further communicated with the spherical cavity 604 upwards and is communicated with the outside downwards, namely, the lower half part of the spherical cavity 604 is occupied by the truncated cone-shaped cavity 603, and the remaining spherical cavity 604 is more than half.
The combination of the lateral force avoiding multidirectional connector 6 comprises a first connecting block 61 and a second connecting block 62, the spherical cavity 604 is divided into two hemispherical cavities 641, and the two hemispherical cavities 641 are respectively arranged on the first connecting block 61 and the second connecting block 62; the truncated cone-shaped cavity 603 is divided into two half truncated cone cavities 631, which are also respectively arranged on the first connecting block 61 and the second connecting block 62.
The top of a piston rod of the hydraulic cylinder 401 is fixedly provided with a ball body 211 matched with the spherical cavity 604, initially, the first connecting block 61 and the second connecting block 62 are detached, the ball body 211 is matched with the first connecting block 61, and then the second connecting block 62 is connected with the first connecting block 61 to complete the matching of the ball body 211 and the spherical cavity 604.
Specifically, in fig. 7 and 8, the first connecting block 61 and the second connecting block 62 are stepped and comprise a middle part with a larger diameter, an upper part with a smaller diameter and a lower part. The first connecting block 61 and the second connecting block 62 are respectively provided with four step through holes 605, two step through holes 605 are arranged at the upper part, the other two step through holes 605 are arranged at the lower part, and the four step through holes 605 are arranged at the outer sides of the hemispherical cavity 641 and the semicircular cavity 631. The stepped through hole 605 comprises a large hole and a small hole, and the connection of the first connecting block 61 and the second connecting block 62 is realized through the fastener combination of the bolt 71 and the nut 72.
In addition, for the first connecting block 61, one large hole of the two stepped through holes 605 on the upper part is in a hexagonal shape matched with the nut 72, the other large hole of the two stepped through holes 605 on the lower part is in a circular shape matched with the nut of the bolt 71, and the same is true for the two stepped through holes 605 on the lower part. With this design, it can be seen that, for the second connecting block 62, the four step through holes 605 are arranged exactly the same as the first connecting block 61, so that the two blocks can just match with the fastening member. Meanwhile, the first connecting block 61 and the second connecting block 62 are identical in structure, and only one connecting block needs to be produced in production and processing, so that the design of a die is facilitated, and the processing procedure is simplified.
The bottom surface of the connecting block 104 is provided with a mounting hole 1041 matched with the lateral force avoiding multidirectional connector 6, and the mounting hole 1041 is also step-shaped and comprises a smaller upper hole 10411 and a larger middle hole 10412. The upper hole 10411 is used for matching with the upper parts of the first connecting block 61 and the second connecting block 62, the inner wall of the middle hole 10412 is provided with internal threads, and the middle parts of the first connecting block 61 and the second connecting block 62 are provided with matched external threads (here, the external threads are formed by machining the first connecting block 61 and the second connecting block 62, combining the first connecting block 61 and the second connecting block 62 by using a fastener, machining the external threads on a lathe together, and then separating the first connecting block 61 and the second connecting block again, so that the structure is completely the same as that of the first connecting block 61 and the second connecting block 62.
In fig. 3, 4 and 6, the synchronous link system 5 includes two sliding bars 501 and two swinging bars 502. The end parts of the two swing strips 502 close to the mounting platform 301 are hinged to the mounting platform 301, the same connecting shaft 503 is fixedly welded to the end parts of the two swing strips 502 close to the box body 1, and two ends of the connecting shaft 503 respectively exceed the two swing strips 502 and are respectively hinged to the two side plates 102. The end parts of the two swinging strips 502 close to the box body 1 are also fixedly provided with downward extension parts 504, the end parts of the two bearing strips 201 close to the box body 1 are provided with penetrating grooves 203, and the two extension parts 504 respectively penetrate downwards from the penetrating grooves 203 on the same side. The two swing strips 502 are respectively connected to the bottom surfaces of the two bearing strips 201 in a sliding manner, two connection lugs 505 are fixedly arranged at the end parts of the two swing strips close to the box body 1, and the penetrating end parts of the two extension parts 504 are respectively hinged to the two connection lugs 505. The end parts of the two waist-shaped pieces one 231, which are provided with the pin shafts 234, are fixedly provided with the connecting lugs three 235 facing upwards, and the end parts of the two swinging strips 502, which are far away from the box body 1, are respectively hinged with the connecting lugs three 235 on the two waist-shaped pieces one 231 on the same side.
In the use process of the electric forklift, the round platform-shaped cavity 603 enables the box connecting block 104, the box body 1 and the pallet fork 2 to swing in a certain range around the center of a sphere, the eccentric wear of a piston rod is eliminated, and the performance reduction of the hydraulic cylinder 401 is avoided.
Example two.
In fig. 1, an electric carrying forklift includes a box 1, a fork 2, a steering and traveling system 3, a hydraulic system 4, a synchronous link system 5, and a side-force avoiding multidirectional connector 6. The hydraulic system 4 is arranged on the control and running system 5, the box body 1 is fixedly arranged on one side of the fork 2 close to the control and running system 4, and the hydraulic system 4 is connected with the box body 1 through the side force avoiding multidirectional connector 6, namely the hydraulic system 4 acts on the box body 1 and the fork 2; the synchronous link system 5 is provided with connections on the two front wheels of the operating and traveling system 3, the box body 1 and the fork 2, so that the two front wheels of the fork 2 are kept in contact with the ground in the lifting process of the fork 2.
In fig. 2, the case 1 includes a large L-shaped plate 101, two side plates 102, a vertical plate 103, and a horizontal plate 105. The L-shaped plate 101 is in an inverted state and detachably connected to the two side plates 102. The vertical plate 103 is fixed to the vertical edge of the other side of the two side plates 102 in a welding manner, and a connecting block 104 is also fixed to the surface of the vertical plate 103 away from the two side plates 102 in a welding manner, and the connecting block 104 is used for subsequent connection with the hydraulic system 4. The horizontal plate 105 is welded and fixed between the two side plates 102, so that a cavity is formed among the horizontal plate 105, the two side plates 102, the L-shaped plate 101 and the vertical plate 103.
In fig. 3, 4 and 6, the pallet fork 2 comprises two load bearing bars 201, a connecting bar 202, two front wheel assemblies. The connecting bar 202 is welded and fixed between the two bearing bars 201 to form a concave whole. Two downward connecting lugs I204 are arranged at the positions, far away from the connecting strip 202, of the two bearing strips 201, and the two connecting lugs I204 are used for connecting a group of front wheel assemblies. The front wheel assembly includes two kidney-shaped panels one 231, two kidney-shaped panels two 232, and two rolling wheels 233 (i.e., the "two front wheels of the fork 2" mentioned above). One end of each of the two first waist-shaped pieces 231 is fixedly provided with the same pin shaft 234, and the two ends of the pin shaft 234 respectively penetrate through the two first waist-shaped pieces 231 and are used for being matched with the two first connecting lugs 204, so that the two first waist-shaped pieces 231 can swing around the pin shafts 234. The middle position of the two second waist-shaped pieces 232 is hinged with the other ends of the two first waist-shaped pieces 231, and the two rolling wheels 233 are respectively and rotatably connected with the end parts of the two second waist-shaped pieces 232 at the same side. In the case 1, the bottom surfaces of the L-shaped plate 101 and the two side plates 102 are located on the same plane, and the three bottom surfaces are welded and fixed to the two bearing strips 201 and the connecting strip 202, and the connecting block 104 is away from the rolling wheel 233.
In fig. 2 and 4, the steering and running system 3 includes a mounting platform 301, a joystick 305, a housing 304, and a pair of rear wheels 302. The housing 304 is fixedly arranged below the mounting platform 301, a motor for driving the rear wheel 302 is arranged in the housing 304, and a power supply 303 for supplying power to the motor is arranged in the cavity of the box body 1. An operating lever 305 is arranged above the mounting platform 301, on the one hand, the operating lever 305 being used to control the steering of the rear wheels 302, and on the other hand, the operating lever 305 being also used to control the subsequent hydraulic system 4.
In fig. 2 and 5, the hydraulic system 4 includes a hydraulic cylinder 401, a tank 402, an oil pump 403, and a direction change valve 404. The oil tank 402 is also placed in the chamber of the tank 1 described above, and the oil pump 403 and the selector valve 404 are both provided on the top surface of the oil tank 402. The oil is pumped by the oil pump 403, and the reversing valve 404 selects different stations to realize the lifting of the piston rod of the hydraulic cylinder 401. In addition, the piston rod of the hydraulic cylinder 401 is also connected to the connection block 104 through the side force avoiding multidirectional connector 6.
In fig. 8, the lateral force avoiding multidirectional connector 6 comprises a first connecting block 61 and a second connecting block 62, wherein the first connecting block 61 and the second connecting block 62 are detachably connected, and the two are combined to form the lateral force avoiding multidirectional connector 6. For the lateral force avoiding multidirectional connector 6, a spherical cavity 604 is arranged in the connector, and a truncated cone-shaped cavity 603 with a small upper part and a large lower part is arranged on the bottom surface of the connector. The truncated cone-shaped cavity 603 is further communicated with the spherical cavity 604 upwards and is communicated with the outside downwards, namely, the lower half part of the spherical cavity 604 is occupied by the truncated cone-shaped cavity 603, and the remaining spherical cavity 604 is more than half.
The combination of the lateral force avoiding multidirectional connector 6 comprises a first connecting block 61 and a second connecting block 62, the spherical cavity 604 is divided into two hemispherical cavities 641, and the two hemispherical cavities 641 are respectively arranged on the first connecting block 61 and the second connecting block 62; the truncated cone-shaped cavity 603 is divided into two half truncated cone cavities 631, which are also respectively arranged on the first connecting block 61 and the second connecting block 62.
The top of a piston rod of the hydraulic cylinder 401 is fixedly provided with a ball body 211 matched with the spherical cavity 604, initially, the first connecting block 61 and the second connecting block 62 are detached, the ball body 211 is matched with the first connecting block 61, and then the second connecting block 62 is connected with the first connecting block 61 to complete the matching of the ball body 211 and the spherical cavity 604.
Specifically, in fig. 8 and 9, the first connecting block 61 and the second connecting block 62 are stepped and include a middle portion with a larger diameter, an upper portion with a smaller diameter, and a lower portion. The first connecting block 61 and the second connecting block 62 are respectively provided with four step through holes 605, two step through holes 605 are arranged at the upper part, the other two step through holes 605 are arranged at the lower part, and the four step through holes 605 are arranged at the outer sides of the hemispherical cavity 641 and the semicircular cavity 631. The stepped through hole 605 comprises a large hole and a small hole, and the connection of the first connecting block 61 and the second connecting block 62 is realized through the fastener combination of the bolt 71 and the nut 72.
In addition, for the first connecting block 61, one large hole of the two stepped through holes 605 on the upper part is in a hexagonal shape matched with the nut 72, the other large hole of the two stepped through holes 605 on the lower part is in a circular shape matched with the nut of the bolt 71, and the same is true for the two stepped through holes 605 on the lower part. With this design, it can be seen that, for the second connecting block 62, the four step through holes 605 are arranged exactly the same as the first connecting block 61, so that the two blocks can just match with the fastening member. Meanwhile, the first connecting block 61 and the second connecting block 62 are identical in structure, and only one connecting block needs to be produced in production and processing, so that the design of a die is facilitated, and the processing procedure is simplified.
The bottom surface of the connecting block 104 is provided with a mounting hole 1041 matched with the lateral force avoiding multidirectional connector 6, and the mounting hole 1041 is also step-shaped and comprises a smaller upper hole 10411 and a larger middle hole 10412. The upper hole 10411 is used for matching with the upper parts of the first connecting block 61 and the second connecting block 62, the inner wall of the middle hole 10412 is provided with internal threads, and the middle parts of the first connecting block 61 and the second connecting block 62 are provided with matched external threads (here, the external threads are formed by machining the first connecting block 61 and the second connecting block 62, combining the first connecting block 61 and the second connecting block 62 by using a fastener, machining the external threads on a lathe together, and then separating the first connecting block 61 and the second connecting block again, so that the structure is completely the same as that of the first connecting block 61 and the second connecting block 62.
In addition, the height of the middle hole 10412 is equal to the sum of the heights of the middle parts and the lower parts of the first connecting block 61 and the second connecting block 62. Thus, after the lateral force avoiding multidirectional connector 6 is screwed with the mounting hole 1041, the internal thread of the lower part corresponding to the middle hole 10412 is left. And a reinforcing ring 73 is further connected to the hollow internal thread in a threaded manner, and after the reinforcing ring 73 is screwed down, the reinforcing ring butts against the bottom surfaces of the middle parts of the first connecting block 61 and the second connecting block 62, so that the lateral force avoiding multidirectional connector 6 is not easy to loosen in the use process.
In fig. 3, 4 and 6, the synchronous link system 5 includes two sliding bars 501 and two swinging bars 502. The end parts of the two swing strips 502 close to the mounting platform 301 are hinged to the mounting platform 301, the same connecting shaft 503 is fixedly welded to the end parts of the two swing strips 502 close to the box body 1, and two ends of the connecting shaft 503 respectively exceed the two swing strips 502 and are respectively hinged to the two side plates 102. The end parts of the two swinging strips 502 close to the box body 1 are also fixedly provided with downward extension parts 504, the end parts of the two bearing strips 201 close to the box body 1 are provided with penetrating grooves 203, and the two extension parts 504 respectively penetrate downwards from the penetrating grooves 203 on the same side. The two swing strips 502 are respectively connected to the bottom surfaces of the two bearing strips 201 in a sliding manner, two connection lugs 505 are fixedly arranged at the end parts of the two swing strips close to the box body 1, and the penetrating end parts of the two extension parts 504 are respectively hinged to the two connection lugs 505. The end parts of the two waist-shaped pieces one 231, which are provided with the pin shafts 234, are fixedly provided with the connecting lugs three 235 facing upwards, and the end parts of the two swinging strips 502, which are far away from the box body 1, are respectively hinged with the connecting lugs three 235 on the two waist-shaped pieces one 231 on the same side.
In the use process of the electric forklift, the round platform-shaped cavity 603 enables the box connecting block 104, the box body 1 and the pallet fork 2 to swing in a certain range around the center of a sphere, the eccentric wear of a piston rod is eliminated, and the performance reduction of the hydraulic cylinder 401 is avoided.
Example three.
In fig. 1, an electric carrying forklift includes a box 1, a fork 2, a steering and traveling system 3, a hydraulic system 4, a synchronous link system 5, and a side-force avoiding multidirectional connector 6. The hydraulic system 4 is arranged on the control and running system 5, the box body 1 is fixedly arranged on one side of the fork 2 close to the control and running system 4, and the hydraulic system 4 is connected with the box body 1 through the side force avoiding multidirectional connector 6, namely the hydraulic system 4 acts on the box body 1 and the fork 2; the synchronous link system 5 is provided with connections on the two front wheels of the operating and traveling system 3, the box body 1 and the fork 2, so that the two front wheels of the fork 2 are kept in contact with the ground in the lifting process of the fork 2.
In fig. 2, the case 1 includes a large L-shaped plate 101, two side plates 102, a vertical plate 103, and a horizontal plate 105. The L-shaped plate 101 is in an inverted state and detachably connected to the two side plates 102. The vertical plate 103 is fixed to the vertical edge of the other side of the two side plates 102 in a welding manner, and a connecting block 104 is also fixed to the surface of the vertical plate 103 away from the two side plates 102 in a welding manner, and the connecting block 104 is used for subsequent connection with the hydraulic system 4. The horizontal plate 105 is welded and fixed between the two side plates 102, so that a cavity is formed among the horizontal plate 105, the two side plates 102, the L-shaped plate 101 and the vertical plate 103.
In fig. 3, 4 and 6, the pallet fork 2 comprises two load bearing bars 201, a connecting bar 202, two front wheel assemblies. The connecting bar 202 is welded and fixed between the two bearing bars 201 to form a concave whole. Two downward connecting lugs I204 are arranged at the positions, far away from the connecting strip 202, of the two bearing strips 201, and the two connecting lugs I204 are used for connecting a group of front wheel assemblies. The front wheel assembly includes two kidney-shaped panels one 231, two kidney-shaped panels two 232, and two rolling wheels 233 (i.e., the "two front wheels of the fork 2" mentioned above). One end of each of the two first waist-shaped pieces 231 is fixedly provided with the same pin shaft 234, and the two ends of the pin shaft 234 respectively penetrate through the two first waist-shaped pieces 231 and are used for being matched with the two first connecting lugs 204, so that the two first waist-shaped pieces 231 can swing around the pin shafts 234. The middle position of the two second waist-shaped pieces 232 is hinged with the other ends of the two first waist-shaped pieces 231, and the two rolling wheels 233 are respectively and rotatably connected with the end parts of the two second waist-shaped pieces 232 at the same side. In the case 1, the bottom surfaces of the L-shaped plate 101 and the two side plates 102 are located on the same plane, and the three bottom surfaces are welded and fixed to the two bearing strips 201 and the connecting strip 202, and the connecting block 104 is away from the rolling wheel 233.
In fig. 2 and 4, the steering and running system 3 includes a mounting platform 301, a joystick 305, a housing 304, and a pair of rear wheels 302. The housing 304 is fixedly arranged below the mounting platform 301, a motor for driving the rear wheel 302 is arranged in the housing 304, and a power supply 303 for supplying power to the motor is arranged in the cavity of the box body 1. An operating lever 305 is arranged above the mounting platform 301, on the one hand, the operating lever 305 being used to control the steering of the rear wheels 302, and on the other hand, the operating lever 305 being also used to control the subsequent hydraulic system 4.
In fig. 2 and 5, the hydraulic system 4 includes a hydraulic cylinder 401, a tank 402, an oil pump 403, and a direction change valve 404. The oil tank 402 is also placed in the chamber of the tank 1 described above, and the oil pump 403 and the selector valve 404 are both provided on the top surface of the oil tank 402. The oil is pumped by the oil pump 403, and the reversing valve 404 selects different stations to realize the lifting of the piston rod of the hydraulic cylinder 401. In addition, the piston rod of the hydraulic cylinder 401 is also connected to the connection block 104 through the side force avoiding multidirectional connector 6.
In fig. 8, the lateral force avoiding multidirectional connector 6 comprises a first connecting block 61 and a second connecting block 62, wherein the first connecting block 61 and the second connecting block 62 are detachably connected, and the two are combined to form the lateral force avoiding multidirectional connector 6. For the lateral force avoiding multidirectional connector 6, a spherical cavity 604 is arranged in the connector, and a truncated cone-shaped cavity 603 with a small upper part and a large lower part is arranged on the bottom surface of the connector. The truncated cone-shaped cavity 603 is further communicated with the spherical cavity 604 upwards and is communicated with the outside downwards, namely, the lower half part of the spherical cavity 604 is occupied by the truncated cone-shaped cavity 603, and the remaining spherical cavity 604 is more than half.
The combination of the lateral force avoiding multidirectional connector 6 comprises a first connecting block 61 and a second connecting block 62, the spherical cavity 604 is divided into two hemispherical cavities 641, and the two hemispherical cavities 641 are respectively arranged on the first connecting block 61 and the second connecting block 62; the truncated cone-shaped cavity 603 is divided into two half truncated cone cavities 631, which are also respectively arranged on the first connecting block 61 and the second connecting block 62.
The top of a piston rod of the hydraulic cylinder 401 is fixedly provided with a ball body 211 matched with the spherical cavity 604, initially, the first connecting block 61 and the second connecting block 62 are detached, the ball body 211 is matched with the first connecting block 61, and then the second connecting block 62 is connected with the first connecting block 61 to complete the matching of the ball body 211 and the spherical cavity 604.
Specifically, in fig. 10 to 13, each of the first connecting block 61 and the second connecting block 62 is stepped, and includes a middle portion having a larger diameter, an upper portion having a smaller diameter, and a lower portion. The first connecting block 61 and the second connecting block 62 are respectively provided with four step through holes 605, two step through holes 605 are arranged at the upper part, the other two step through holes 605 are arranged at the lower part, and the four step through holes 605 are arranged at the outer sides of the hemispherical cavity 641 and the semicircular cavity 631. The stepped through hole 605 comprises a large hole and a small hole, and the connection of the first connecting block 61 and the second connecting block 62 is realized through the fastener combination of the bolt 71 and the nut 72.
In addition, for the first connecting block 61, one large hole of the two stepped through holes 605 on the upper part is in a hexagonal shape matched with the nut 72, the other large hole of the two stepped through holes 605 on the lower part is in a circular shape matched with the nut of the bolt 71, and the same is true for the two stepped through holes 605 on the lower part. With this design, it can be seen that, for the second connecting block 62, the four step through holes 605 are arranged exactly the same as the first connecting block 61, so that the two blocks can just match with the fastening member. Meanwhile, the first connecting block 61 and the second connecting block 62 are identical in structure, and only one connecting block needs to be produced in production and processing, so that the design of a die is facilitated, and the processing procedure is simplified.
The bottom surface of the connecting block 104 is provided with a mounting hole 1041 matched with the lateral force avoiding multidirectional connector 6, and the mounting hole 1041 is also step-shaped and comprises a smaller upper hole 10411 and a larger middle hole 10412. The upper hole 10411 is used for matching with the upper parts of the first connecting block 61 and the second connecting block 62, the inner wall of the middle hole 10412 is provided with internal threads, and the middle parts of the first connecting block 61 and the second connecting block 62 are provided with matched external threads (here, the external threads are formed by machining the first connecting block 61 and the second connecting block 62, combining the first connecting block 61 and the second connecting block 62 by using a fastener, machining the external threads on a lathe together, and then separating the first connecting block 61 and the second connecting block again, so that the structure is completely the same as that of the first connecting block 61 and the second connecting block 62.
In addition, the height of the middle hole 10412 is equal to the sum of the heights of the middle parts and the lower parts of the first connecting block 61 and the second connecting block 62. Thus, after the lateral force avoiding multidirectional connector 6 is screwed with the mounting hole 1041, the internal thread of the lower part corresponding to the middle hole 10412 is left. And a reinforcing ring 73 is further connected to the hollow internal thread in a threaded manner, and after the reinforcing ring 73 is screwed down, the reinforcing ring butts against the bottom surfaces of the middle parts of the first connecting block 61 and the second connecting block 62, so that the lateral force avoiding multidirectional connector 6 is not easy to loosen in the use process.
In addition, the mounting hole 1041 further includes a largest lower hole 10413, and an annular groove 10414 is opened on an inner wall of the lower hole 10413. The locking plate 74 is disposed in the annular groove 10414, and the locking plate 74 abuts against the bottom surface of the reinforcing ring 73 to restrict the downward movement of the reinforcing ring 73, so as to achieve the effect of locking the multidirectional connector 6 and the reinforcing ring 73.
In fig. 3, 4 and 6, the synchronous link system 5 includes two sliding bars 501 and two swinging bars 502. The end parts of the two swing strips 502 close to the mounting platform 301 are hinged to the mounting platform 301, the same connecting shaft 503 is fixedly welded to the end parts of the two swing strips 502 close to the box body 1, and two ends of the connecting shaft 503 respectively exceed the two swing strips 502 and are respectively hinged to the two side plates 102. The end parts of the two swinging strips 502 close to the box body 1 are also fixedly provided with downward extension parts 504, the end parts of the two bearing strips 201 close to the box body 1 are provided with penetrating grooves 203, and the two extension parts 504 respectively penetrate downwards from the penetrating grooves 203 on the same side. The two swing strips 502 are respectively connected to the bottom surfaces of the two bearing strips 201 in a sliding manner, two connection lugs 505 are fixedly arranged at the end parts of the two swing strips close to the box body 1, and the penetrating end parts of the two extension parts 504 are respectively hinged to the two connection lugs 505. The end parts of the two waist-shaped pieces one 231, which are provided with the pin shafts 234, are fixedly provided with the connecting lugs three 235 facing upwards, and the end parts of the two swinging strips 502, which are far away from the box body 1, are respectively hinged with the connecting lugs three 235 on the two waist-shaped pieces one 231 on the same side.
In the use process of the electric forklift, the round platform-shaped cavity 603 enables the box connecting block 104, the box body 1 and the pallet fork 2 to swing in a certain range around the center of a sphere, the eccentric wear of a piston rod is eliminated, and the performance reduction of the hydraulic cylinder 401 is avoided.
Claims (7)
1. An electric carrying forklift comprises a box body (1), a pallet fork (2), a control and driving system (3), a hydraulic system (4) and a synchronous connecting rod system (5), wherein the box body (1) is fixedly arranged on the pallet fork (2), the hydraulic system (4) acts on the box body (1) and the pallet fork (2), and the electric carrying forklift is characterized by further comprising a side force avoiding multidirectional connector (6), the side force avoiding multidirectional connector (6) is used for connecting the hydraulic system (4) with the box body (1), a spherical cavity (604) is arranged in the electric carrying forklift, a truncated cone-shaped cavity (603) with a small top and a large bottom is arranged on the bottom surface of the electric carrying forklift, the truncated cone-shaped cavity (603) is upwards communicated with the spherical cavity (604) and downwards communicated with the outside, namely the lower half part of the spherical cavity (604) is occupied by the truncated cone-shaped cavity (603), and the remained spherical cavity (604) is more than half, and the top of a piston rod of a hydraulic cylinder (401) in the hydraulic system (4) is fixedly provided with a sphere (211) matched with the spherical cavity (604).
2. The electric carrying forklift as recited in claim 1, wherein the lateral force avoiding multidirectional connector (6) comprises a first connecting block (61) and a second connecting block (62), the first connecting block (61) and the second connecting block (62) are detachably connected, and a hemispherical cavity (641) forming the spherical cavity (604) and a semicircular cavity (631) forming the circular truncated cone cavity (603) are respectively arranged on the first connecting block (61) and the second connecting block (62).
3. An electric handling forklift truck according to claim 2, wherein each of the first connecting block (61) and the second connecting block (62) is stepped and comprises a middle part with a larger diameter, an upper part with a smaller diameter and a lower part, the first connecting block (61) and the second connecting block (62) are further provided with four stepped through holes (605) for setting fasteners, two stepped through holes (605) are arranged on the upper part, the other two stepped through holes (605) are arranged on the lower part, and the four stepped through holes (605) are arranged outside the hemispherical cavity (641) and the semicircular cavity (631).
4. An electric handling forklift truck according to claim 3, wherein said stepped through holes (605) comprise a large hole and a small hole, and for said first connecting block (61), of the two stepped through holes (605) in the upper part, one large hole (651) is hexagonal to fit the nut (72) of the fastener, the other large hole (651) is circular to fit the nut of the bolt (71) of the fastener, and for said second connecting block (62), the arrangement of its four stepped through holes (605) is identical to that of said first connecting block (61).
5. An electric handling forklift truck according to claim 3, wherein the box body (1) is provided with a mounting hole (1041) for matching with the lateral force avoiding multidirectional connector (6), the mounting hole (1041) is step-shaped and comprises a smaller upper hole (10411) and a larger middle hole (10412), the upper hole (10411) is used for matching with the upper parts of the first connecting block (61) and the second connecting block (62), the inner wall of the middle hole (10412) is provided with internal threads, and the middle parts of the first connecting block (61) and the second connecting block (62) are provided with matched external threads.
6. An electric handling forklift truck according to claim 5, wherein the height of the middle hole (10412) is equal to the sum of the heights of the middle parts and the lower parts of the first connecting block (61) and the second connecting block (62), after the side force avoiding multidirectional connector (6) and the mounting hole (1041) are screwed, the internal thread of the corresponding lower part of the middle hole (10412) is hollowed, and a reinforcing ring (73) is further screwed on the hollowed internal thread.
7. An electric handling forklift as claimed in claim 5, wherein the mounting hole (1041) further comprises a largest lower hole (10413), an annular groove (10414) is formed in the inner wall of the lower hole (10413), and a locking plate (74) is arranged in the annular groove (10414).
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| CN202111678805.8A CN114394557A (en) | 2021-12-31 | 2021-12-31 | Electric carrying forklift |
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| CN202111678805.8A CN114394557A (en) | 2021-12-31 | 2021-12-31 | Electric carrying forklift |
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