CN111115521A - Automatic leveling device for forklift gantry - Google Patents
Automatic leveling device for forklift gantry Download PDFInfo
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- CN111115521A CN111115521A CN201811285845.4A CN201811285845A CN111115521A CN 111115521 A CN111115521 A CN 111115521A CN 201811285845 A CN201811285845 A CN 201811285845A CN 111115521 A CN111115521 A CN 111115521A
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- 230000009471 action Effects 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000033001 locomotion Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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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
-
- 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
- B66F9/08—Masts; Guides; Chains
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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 relates to the technical field of control and adjustment of forklift gantries, and provides an automatic leveling device for the forklift gantries. When the gantry type hydraulic cylinder works, when the gantry tilts forwards or backwards under the action of a piston rod of the hydraulic cylinder and a fixed block, the first connecting rod is driven to swing, the first connecting rod drives the second connecting rod to rotate around the rotating shaft, the rotating angle sensor and the rotating shaft rotate coaxially to generate a rotating angle signal, the rotating angle signal is transmitted to the controller, and the controller sends an instruction to a hydraulic control system of the hydraulic cylinder according to actual conditions. In the process, the forward-inclined and backward-inclined rotation angles of the gantry are converted and amplified through the swinging of the first connecting rod and the second connecting rod, so that the rotation angle of the rotation angle sensor is larger, the rotation range of the rotation angle sensor is larger, the formed rotation angle signal threshold is wider, the controller can more accurately control the action of the gantry, the requirements on the rotation angle sensor and the controller are low, and the cost is low.
Description
Technical Field
The invention belongs to the technical field of control and adjustment of forklift gantries, and particularly relates to an automatic leveling device for a forklift gantry.
Background
As shown in fig. 1, chinese patent application with publication number "CN 204022412U" discloses a tilt control device for a forklift mast, which comprises a tilt cylinder 11 and a lift cylinder, and is characterized in that: the controller is characterized by further comprising a controller, a signal input end of the controller is connected with an inclination sensor, a signal output end of the controller is connected with an oil pump motor, a trigger switch, a forward tilting switch and a backward tilting switch are connected between a multi-path signal input end and a voltage access end of the controller in parallel, a forward tilting electromagnetic valve and a backward tilting electromagnetic valve are connected between a multi-path signal output end of the controller and a grounding end in parallel, an oil pump outlet driven by the oil pump motor is connected with an oil circuit of the inclination oil cylinder 11 after being controlled by the forward tilting electromagnetic valve and the backward tilting electromagnetic valve, and a piston rod of the inclination oil cylinder 11. However, in the above-mentioned tilt control device for a forklift mast, the mast rotation angle is formed by swinging the driving swing arm 10 and the driven swing arm 9 of the transmission mechanism to drive the sensor rotation shaft to rotate. In the process, in the process that the front and back tilting angles of the door frame are transmitted to the sensor, the rotation angle of the sensor is small, (as shown in fig. 1, when the tilting cylinder rotates by 5 degrees, the sensor rotates by 7.4 degrees), the formed rotation angle signal threshold is small, the accuracy requirement on the sensor and the controller is high, namely the signal conversion accuracy is low, the control accuracy of the controller on the door frame is influenced, the action is not accurate enough, and the cost is high due to the high accuracy requirement on the sensor and the controller.
Disclosure of Invention
The invention aims to provide an automatic leveling device for a forklift mast, and aims to solve the problems of inaccurate action control of a controller on the mast and high cost caused by small threshold value of a corner signal and low conversion precision of the corner signal of the conventional forklift mast inclination control device.
In order to solve the technical problem, the invention provides an automatic leveling device for a forklift gantry, which comprises:
the fixed block is fixed on a gantry of the forklift;
the hydraulic cylinder is fixed on a forklift body, and a piston rod of the hydraulic cylinder is in driving connection with the fixed block so that the gantry tilts forwards or backwards around the forklift body;
the rotating shaft is rotatably connected to the vehicle body;
one end of the first connecting rod is rotatably connected with the fixed block, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the rotating shaft;
the rotation angle sensor is arranged on the rotating shaft and is used for measuring the rotation angle of the second connecting rod around the rotating shaft and generating a rotation angle signal; and
and the controller is in communication connection with the corner sensor to receive the corner signal and send a control instruction to a hydraulic control system of the hydraulic cylinder to control the action of the hydraulic cylinder.
Further, the control action of the controller is as follows:
if the portal frame is in a vertical state, the corner signal is a back-tilting angle value, the corner signal is a front-tilting angle value, and the front-tilting angle is smaller than or equal to 2 degrees, the controller does not send a control instruction to the hydraulic control system, and the portal frame works normally;
if the turning angle signal is a forward inclination angle value and the forward inclination angle is larger than 2 degrees, the controller sends a control instruction to the hydraulic control system, the hydraulic cylinder drives the gantry to tilt backwards until the gantry is in an upright state, and the gantry carries out lifting operation again.
Furthermore, the gantry is an inclined center around the center of forward tilting or backward tilting of the vehicle body, the rotary connection position of the first connecting rod and the fixed block is a rotary connection center, the drive connection position of the piston cylinder and the fixed block is a drive connection center, and the distance between the drive connection center and the inclined center is smaller than the distance between the rotary connection center and the inclined center.
Further, the ratio range of the distance between the rotating connection center and the inclined center to the length of the first connecting rod is 1-1.275, and the ratio range of the length of the first connecting rod to the length of the second connecting rod is 8-10.
Further, the fixed block is the framework that has the opening, the framework is connected according to the preface by horizontal limit, first perpendicular limit, pin joint axle and second and encloses to close and form, first perpendicular limit with portal fixed connection, the piston rod with pin joint axle drive is connected, the second perpendicular limit with first connecting rod rotates to be connected.
Further, be equipped with the mounting panel on the automobile body, the pivot with the mounting panel rotates to be connected and runs through the mounting panel, corner sensor with the second connecting rod is located respectively the relative both sides of mounting panel.
Furthermore, the automobile body is provided with a mounting plate, the rotating shaft is rotatably connected with the mounting plate, and the corner sensor and the second connecting rod are located on the same side of the mounting plate.
Furthermore, the hydraulic cylinder comprises a cylinder barrel, a cylinder cover covering the opening of the cylinder barrel, a piston slidably arranged in the cavity of the cylinder barrel, and a piston rod arranged on the piston and penetrating through the cylinder cover.
Furthermore, the front inclination angle of the door frame is 0-5 degrees.
Furthermore, the caster angle of the door frame is 0-7 degrees.
The automatic leveling device for the forklift gantry provided by the invention has the beneficial effects that:
in the automatic leveling device for the forklift mast provided by the embodiment, when the mast inclines forwards or backwards under the power action of the hydraulic cylinder piston rod and the fixed block, the mast drives the first connecting rod to swing, the first connecting rod drives the second connecting rod to rotate around the rotating shaft, the corner sensor and the rotating shaft rotate coaxially to generate a corner signal, the corner signal is transmitted to the controller, the controller processes the received corner signal, and an instruction is sent to a hydraulic control system of the hydraulic cylinder according to actual conditions. In the process, the forward-inclined and backward-inclined rotation angles of the gantry are converted and amplified through the swinging of the first connecting rod and the second connecting rod, so that the rotation angle of the rotation angle sensor is larger, the rotation range of the rotation angle sensor is larger, the threshold value of the formed rotation angle signal is wider, the controller can better identify and receive the rotation angle signal, more accurate calculation is carried out, and a control instruction is sent out, so that the motion precision of the gantry is higher.
Drawings
FIG. 1 is a schematic structural view of a prior art forklift mast tilt control apparatus;
FIG. 2 is a schematic structural diagram of an automatic leveling device for a forklift mast provided by an embodiment of the invention;
FIG. 3 is a schematic structural view of the automatic leveling device for the forklift mast mounted on the body and mast according to the embodiment of the present invention;
FIG. 4 is a top view of a forklift mast automatic leveling device provided by an embodiment of the invention;
FIG. 5 is an enlarged schematic view of the auto leveling device of the forklift mast provided in FIG. 4 at circle A;
fig. 6 is an enlarged schematic view of the auto leveling device of the forklift mast provided in fig. 4 at circle B.
Description of reference numerals:
| 10 | automatic leveling device for |
11 | Fixed |
21 | |
| 12 | |
22 | |
121 | Piston |
| 13 | |
141 | First connecting |
142 | Second connecting |
| 15 | |
161 | Center of |
162 | Center of |
| 163 | |
111 | |
112 | First |
| 113 | |
114 | Second |
17 | |
| 122 | |
123 | Cylinder cover |
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 2 to 6, the preferred embodiment of the present invention is provided.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up, down, etc. in the present embodiment are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting.
In the automatic leveling device 10 for the forklift mast provided by the embodiment, the forward-inclined and backward-inclined rotation angles of the mast 21 are amplified through conversion, so that the rotation angle of the rotation angle sensor 15 is large, a rotation angle signal in a large range can be formed and transmitted to the controller, the signal range identified by the controller is wider, the control precision is higher, the effect is better, the requirements on the rotation angle sensor 15 and the controller are relatively lower, and the purposes of accurate control and cost saving are achieved.
Specifically, as shown in fig. 2 to 6, the present embodiment provides a forklift mast automatic leveling device 10, which includes:
the fixed block 11 is fixed on a portal 21 of the forklift, namely, the fixed block 11 and the portal 21 act together;
the hydraulic cylinder 12 is fixed on a body 22 of the forklift, and a piston rod 121 of the hydraulic cylinder 12 is in driving connection with the fixed block 11 so as to enable the gantry 21 to tilt forwards or backwards around the body 22; it should be noted that "driving connection" means that the piston rod 121 is connected to the fixed block 11, and it will drive the fixed block 11 to make a linear reciprocating motion, and since the door frame 21 is connected to the vehicle body 22, the door frame 21 can rotate around the vehicle body 22, so that finally, the resultant motion of the fixed block 11 and the door frame 21 is: the fixed block 11 and the door frame 21 move forwards or backwards around the vehicle body 22 together; it can also be understood that: the fixed block 11 can also rotate relative to the piston rod 121 when moving back and forth linearly along with the piston rod 121; in particular, the "drive connection" may be a rotational connection;
a rotating shaft 13 rotatably connected to the vehicle body 22; here, the rotating shaft 13 may be directly rotatably connected with the vehicle body 22, or the rotating shaft 13 may be indirectly connected with the vehicle body 22;
a first connecting rod 141 and a second connecting rod 142, wherein one end of the first connecting rod 141 is rotatably connected with the fixed block 11, the other end of the first connecting rod 141 is rotatably connected with one end of the second connecting rod 142, and the other end of the second connecting rod 142 is rotatably connected with the rotating shaft 13; thus, the forward or backward tilting motion of the fixed block 11 can drive the first link 141 to swing around the fixed block 11, and the first link 141 can drive the second link 142 to swing around the rotating shaft 13;
the rotation angle sensor 15 is arranged on the rotating shaft 13 and is used for measuring the rotation angle of the second connecting rod 142 around the rotating shaft 13 and generating a rotation angle signal, wherein the rotation angle sensor 15 and the rotating shaft 13 rotate coaxially, namely the rotation angle of the rotating shaft 13 is also the rotation angle of the rotation angle sensor 15; and
and the controller is in communication connection with the rotation angle sensor 15 to receive the rotation angle signal and send a control command to a hydraulic control system of the hydraulic cylinder 12 to control the action of the hydraulic cylinder 12.
As shown in fig. 2 to 6, in the automatic leveling device 10 for a forklift mast provided in this embodiment, when the mast 21 tilts forward or backward under the power of the piston rod 121 of the hydraulic cylinder 12 and the fixed block 11, the first link 141 is driven to swing, the first link 141 drives the second link 142 to rotate around the rotating shaft 13, the rotation angle sensor 15 rotates coaxially with the rotating shaft 13 to generate a rotation angle signal, and the rotation angle signal is transmitted to the controller, and the controller processes the received rotation angle signal and sends an instruction to the hydraulic control system of the hydraulic cylinder 12 according to actual conditions. In this process, the forward-tilting and backward-tilting rotation angles of the gantry 21 are converted and amplified through the swinging of the first connecting rod 141 and the second connecting rod 142, so that the rotation angle of the rotation angle sensor 15 is relatively large, as shown in fig. 4, when the forward-tilting angle of the gantry 21 is 3 °, the rotation angle of the rotation angle sensor 15 is about 46 ° after the conversion and amplification, when the backward-tilting angle of the gantry 21 is 5 °, the rotation angle of the rotation angle sensor 15 is about 63.1 ° after the conversion and amplification, so that the rotation range of the rotation angle sensor 15 is large, the formed rotation angle signal threshold is relatively wide, the controller can better recognize and receive the rotation angle signal, perform more accurate calculation and send a control command, so that the motion accuracy of the gantry 21 is higher, compared with the prior art, the rotation angle signal threshold is wide, the motion control of the gantry 21 is accurate, and the requirements on the rotation angle sensor 15 and the controller are lower, the cost is saved.
In order to make the controller control the motion of the gantry 21 more accurately and to make the gantry 21 work more safely, specifically, the control motion of the controller is:
if the portal frame 21 is in a vertical state, the corner signal is a back-tilting angle value, the corner signal is a front-tilting angle value, and the front-tilting angle is smaller than or equal to 2 degrees, the controller does not send a control instruction to the hydraulic control system, and the portal frame 21 works normally;
if the rotation angle signal is a forward inclination angle value and the forward inclination angle is larger than 2 degrees, the controller sends a control instruction to the hydraulic control system, the hydraulic cylinder 12 drives the gantry 21 to tilt backwards until the gantry 21 is in an upright state, and the gantry 21 performs lifting operation again. Specifically, when the front inclination angle is greater than 2 degrees, the hydraulic control system firstly cuts off the electromagnetic valve lifting oil way of the portal 21, the fork of the portal 21 stops lifting, and is switched to the backward tilting oil way to supply oil to the hydraulic cylinder 12 so as to enable the hydraulic cylinder to perform backward tilting action, and after the portal 21 is in a vertical state, the fork of the portal 21 can continue lifting, so that safe operation is better guaranteed.
As shown in fig. 2 to 6, in order to ensure that the angle of forward tilting or backward tilting of the mast 21 can be well enlarged through the swing of the first link 141 and the second link 142, specifically, the center of forward tilting or backward tilting of the mast 21 around the vehicle body 22 is an inclination center 161, the rotational connection position of the first link 141 and the fixed block 11 is a rotational connection center 162, the drive connection position of the piston cylinder and the fixed block 11 is a drive connection center 163, and the distance between the drive connection center 163 and the inclination center 161 is smaller than the distance between the rotational connection center 162 and the inclination center 161. Thus, during forward or backward tilting movements of the gantry 21, the displacement of the rotation link center 162 is greater than the displacement of the drive link center 163; it can also be understood that: the larger the moving displacement of the first connecting rod 141 is, the larger the amplitude of the swing of the second connecting rod 142 driven by the first connecting rod is, and the larger the rotating angle of the rotating shaft 13 and the rotating angle sensor 15 is, so that the rotating range of the rotating angle sensor 15 is large, the formed rotating angle signal threshold is wider, the motion precision of the gantry 21 controlled by the controller more accurately is high, meanwhile, the requirements on the rotating angle sensor 15 and the controller are lower, and the cost is low.
In order to ensure the amplification of the rotation angle sensor 15, specifically, the ratio of the distance between the rotation connection center 162 and the inclination center 161 to the length of the first link 141 ranges from 1 to 1.275, and the ratio of the length of the first link 141 to the length of the second link 142 ranges from 8 to 10. In a specific preferred implementation application: if the distance between the rotation connecting center 162 and the tilting center 161 is 487mm, the length of the first link 141 is 382mm, and the length of the second link 142 is 40mm, that is, the ratio between the distance between the rotation connecting center 162 and the tilting center 161 and the length of the first link 141 is 487/382-1.275, and the ratio between the length of the first link 141 and the length of the second link 142 is 382/40-9.55.
As shown in fig. 2 to 6, regarding the preferred embodiment of the specific structure of the fixed block 11, the fixed block 11 is a frame with a through opening, the frame is formed by sequentially connecting and enclosing a horizontal edge 111, a first vertical edge 112, a pivot shaft 113 and a second vertical edge 114, the first vertical edge 112 is fixedly connected with the door frame 21, the piston rod 121 is drivingly connected with the pivot shaft 113, and the second vertical edge 114 is rotatably connected with the first connecting rod 141. In this way, the piston rod 121 acts on the pivot shaft 113 to make the fixed block 11 move back and forth linearly, the fixed block 11 acts on the door frame 21 through the first vertical edge 112 to make the door frame 21 tilt forward or backward, and the fixed block 11 acts on the first link 141 through the second vertical edge 114 to make the first link 141 swing around the fixed block 11.
Regarding one mounting manner of the rotation angle sensor 15: in order to facilitate the installation of the rotation angle sensor 15 and the rotation shaft 13, specifically, the vehicle body 22 is provided with the mounting plate 17, the rotation shaft 13 is rotatably connected with the mounting plate 17 and penetrates through the mounting plate 17, and the rotation angle sensor 15 and the second connecting rod 142 are respectively located at two opposite sides of the mounting plate 17, so that the mounting space at two sides of the mounting plate 17 can be reasonably utilized, and the purpose of reducing the size of the whole forklift gantry automatic leveling device 10 is achieved.
Of course, for the installation of the rotation angle sensor 15, it is also possible that the vehicle body 22 is provided with an installation plate 17, the rotating shaft 13 is rotatably connected with the installation plate 17, and the rotation angle sensor 15 and the second connecting rod 142 are located on the same side of the installation plate 17; it is to be understood that, in the present embodiment, as for the installation of the rotation angle sensor 15, the installation condition that the rotating shaft 13, the rotation angle sensor 15, and the second link 142 rotate coaxially is satisfied.
Specifically, as shown in fig. 2 to 6, the hydraulic cylinder 12 includes a cylinder tube 122, a cylinder head 123 covering a cylinder opening of the cylinder tube 122, a piston (not shown) slidably disposed in a cylinder chamber of the cylinder tube 122, and a piston rod 121 disposed on the piston and penetrating through the cylinder head 123. The hydraulic cylinder 12 adopting the form has simple structure and low cost.
In order to facilitate loading of the pallet fork of the door frame 21, specifically, the forward inclination angle of the door frame 21 ranges from 0 degree to 5 degrees.
In order to facilitate the lifting operation of the fork of the portal frame 21, specifically, the back inclination angle of the portal frame 21 ranges from 0 degree to 7 degrees. Thus, the safe operation can be better ensured.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Fork truck portal automatic levelling device, its characterized in that includes:
the fixed block is fixed on a gantry of the forklift;
the hydraulic cylinder is fixed on a forklift body, and a piston rod of the hydraulic cylinder is in driving connection with the fixed block so that the gantry tilts forwards or backwards around the forklift body;
the rotating shaft is rotatably connected to the vehicle body;
one end of the first connecting rod is rotatably connected with the fixed block, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the rotating shaft;
the rotation angle sensor is arranged on the rotating shaft and is used for measuring the rotation angle of the second connecting rod around the rotating shaft and generating a rotation angle signal; and
and the controller is in communication connection with the corner sensor to receive the corner signal and send a control instruction to a hydraulic control system of the hydraulic cylinder to control the action of the hydraulic cylinder.
2. The forklift mast automatic leveling device according to claim 1, wherein the control action of the controller is:
if the portal frame is in a vertical state, the corner signal is a back-tilting angle value, the corner signal is a front-tilting angle value, and the front-tilting angle is smaller than or equal to 2 degrees, the controller does not send a control instruction to the hydraulic control system, and the portal frame works normally;
if the turning angle signal is a forward inclination angle value and the forward inclination angle is larger than 2 degrees, the controller sends a control instruction to the hydraulic control system, the hydraulic cylinder drives the gantry to tilt backwards until the gantry is in an upright state, and the gantry carries out lifting operation again.
3. The forklift mast automatic leveling device according to claim 1, wherein the mast is an inclined center around a center of forward or backward inclination of the body, a rotational connection point of the first link and the fixed block is a rotational connection center, a driving connection point of the piston cylinder and the fixed block is a driving connection center, and a distance between the driving connection center and the inclined center is smaller than a distance between the rotational connection center and the inclined center.
4. The forklift mast automatic leveling device as recited in claim 3, wherein the ratio of the distance of the rotational connection center from the tilting center to the length of the first link ranges from 1 to 1.275, and the ratio of the length of the first link to the length of the second link ranges from 8 to 10.
5. The automatic leveling device for the forklift mast according to claim 1, wherein the fixing block is a frame body with a through opening, the frame body is formed by sequentially connecting and enclosing a transverse edge, a first vertical edge, a pivot shaft and a second vertical edge, the first vertical edge is fixedly connected with the mast, the piston rod is in driving connection with the pivot shaft, and the second vertical edge is in rotating connection with the first connecting rod.
6. The automatic leveling device for the forklift mast as recited in claim 1, wherein a mounting plate is provided on the body, the pivot shaft is rotatably connected to and extends through the mounting plate, and the rotation angle sensor and the second link are respectively located on opposite sides of the mounting plate.
7. The automatic leveling device for the forklift mast as recited in claim 1, wherein a mounting plate is provided on the body, the pivot shaft is rotatably connected to the mounting plate, and the rotation angle sensor and the second link are located on the same side of the mounting plate.
8. The automatic leveling device for the forklift mast as recited in claim 1, wherein the hydraulic cylinder comprises a cylinder barrel, a cylinder cover covering a cylinder opening of the cylinder barrel, a piston slidably disposed in a cylinder cavity of the cylinder barrel, and a piston rod disposed on the piston and penetrating through the cylinder cover.
9. The automatic leveling device for the forklift mast as recited in claim 1, wherein the forward inclination angle of the mast is 0 to 5 degrees.
10. The automatic leveling device for forklift gantries of claim 1 wherein the caster angle of the gantries is 0 to 7 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285845.4A CN111115521A (en) | 2018-10-31 | 2018-10-31 | Automatic leveling device for forklift gantry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285845.4A CN111115521A (en) | 2018-10-31 | 2018-10-31 | Automatic leveling device for forklift gantry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111115521A true CN111115521A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811285845.4A Pending CN111115521A (en) | 2018-10-31 | 2018-10-31 | Automatic leveling device for forklift gantry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111115521A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217262A (en) * | 1997-11-18 | 1999-05-26 | 株式会社丰田自动织机制作所 | Detection device for axle rotary angle of engineering vehicle and engineering vehicle thereof |
| CN1220232A (en) * | 1997-12-15 | 1999-06-23 | 株式会社丰田自动织机制作所 | Lift mechanism controller and control method for industrial vehicles |
| KR101358597B1 (en) * | 2007-12-26 | 2014-02-04 | 주식회사 두산 | A Forklift Device With A Tilting Angle Controlling Structure Of A Mast |
| CN104108668A (en) * | 2014-07-16 | 2014-10-22 | 宁波如意股份有限公司 | Forklift portal frame tilt control device and forklift anti-rollover control method |
| CN105793188A (en) * | 2013-12-03 | 2016-07-20 | 株式会社斗山 | Forklift and forklift control method |
-
2018
- 2018-10-31 CN CN201811285845.4A patent/CN111115521A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217262A (en) * | 1997-11-18 | 1999-05-26 | 株式会社丰田自动织机制作所 | Detection device for axle rotary angle of engineering vehicle and engineering vehicle thereof |
| CN1220232A (en) * | 1997-12-15 | 1999-06-23 | 株式会社丰田自动织机制作所 | Lift mechanism controller and control method for industrial vehicles |
| KR101358597B1 (en) * | 2007-12-26 | 2014-02-04 | 주식회사 두산 | A Forklift Device With A Tilting Angle Controlling Structure Of A Mast |
| CN105793188A (en) * | 2013-12-03 | 2016-07-20 | 株式会社斗山 | Forklift and forklift control method |
| CN104108668A (en) * | 2014-07-16 | 2014-10-22 | 宁波如意股份有限公司 | Forklift portal frame tilt control device and forklift anti-rollover control method |
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Application publication date: 20200508 |
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