CN213416184U - Electric hydraulic cylinder for forklift - Google Patents
Electric hydraulic cylinder for forklift Download PDFInfo
- Publication number
- CN213416184U CN213416184U CN202022484721.8U CN202022484721U CN213416184U CN 213416184 U CN213416184 U CN 213416184U CN 202022484721 U CN202022484721 U CN 202022484721U CN 213416184 U CN213416184 U CN 213416184U
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- piston
- hole
- motor
- hydraulic cylinder
- oil
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- 238000007789 sealing Methods 0.000 claims description 19
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 230000000630 rising effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 61
- 239000010720 hydraulic oil Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000005086 pumping Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- Forklifts And Lifting Vehicles (AREA)
- Actuator (AREA)
Abstract
The utility model relates to a pneumatic cylinder for fork truck, especially electric hydraulic cylinder for fork truck, including ejector pin device, oil discharge device, distributing valve, switching-over valve and relief valve, still include: the cylinder body is provided with a piston hole and an oil way, the oil way is respectively communicated with the piston hole and the mandril device, and the distribution valve, the reversing valve and the pressure release valve are all arranged on the oil way; the piston is movably inserted in the piston hole; the piston driving device is connected with the piston and is used for driving the piston to reciprocate in the piston hole; and the motor is arranged on the cylinder body and is connected with the piston driving device. The utility model provides an automatic rising of electronic hydraulic cylinder owner ejector pin, simple structure compactness, convenient to use, main ejector pin rise stably, rise fast, improved work efficiency for fork truck.
Description
Technical Field
The utility model relates to a pneumatic cylinder for fork truck, especially electric hydraulic cylinder for fork truck.
Background
The existing forklift is manual, namely, the lifting of the main ejector rod is realized by manually pressing the pull rod, the forklift can be lifted by reciprocating for many times, the lifting speed is low, and the working efficiency is low.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides an adopt electric mode to carry out automatic rising, rise fast, efficient, the main ejector pin rises stable electric hydraulic cylinder for fork truck, concrete technical scheme is:
electric hydraulic cylinder for fork truck includes ejector pin device, oil discharge device, distributing valve, switching-over valve and relief valve, still includes: the cylinder body is provided with a piston hole and an oil way, the oil way is respectively communicated with the piston hole and the mandril device, and the distribution valve, the reversing valve and the pressure release valve are all arranged on the oil way; the piston is movably inserted in the piston hole; the piston driving device is connected with the piston and is used for driving the piston to reciprocate in the piston hole; and the motor is arranged on the cylinder body and is connected with the piston driving device.
Through adopting above-mentioned technical scheme, the motor passes through piston drive arrangement and drives piston reciprocating motion, and the piston inhales the piston hole with the hydraulic oil of oil storage intracavity in the cylinder body, then impresses the hydraulic oil in the piston hole to jacking main ejector pin in the ejector pin device, realizes the automatic jack-up of main ejector pin, owing to adopt the motor drive piston, consequently the injection rate of hydraulic oil is fast to the jack-up is stable, has improved efficiency, simple structure simultaneously, convenient to use.
In the prior art, the pull rod is pressed to move in a reciprocating mode to pump oil, the pull rod adopts a lever mode for labor saving, the stroke of pressing of the pull rod is long, the required time is long, the lifting speed of the main ejector rod is low, the efficiency is low, the forklift is easy to shake when the pull rod is pressed in a reciprocating mode, the goods are unstable, the motor is adopted to drive the piston to pump oil, although the stroke of the piston is short, the oil pumping amount is small, the reciprocating movement speed of the piston under the driving of the motor is high, the efficiency is high, continuous and stable oil pumping is realized, the pull rod does not need to be moved when the main ejector rod is lifted, the forklift cannot shake, and the safety is high.
Further, the piston driving device includes: the eccentric shaft is fixed on the motor and is positioned at one end of the piston; and the oil absorption spring or the connecting rod is movably arranged in the piston hole and is positioned at the other end of the piston, the oil absorption spring is used for pressing the piston to the eccentric shaft, and two ends of the connecting rod are respectively and rotatably connected with the eccentric shaft and one end of the piston.
By adopting the technical scheme, when the oil absorption spring is adopted, the oil absorption spring pushes the piston to move to absorb oil. The piston is in sliding contact with the eccentric shaft, the force required by oil pressing is large, so that the piston is pushed to move through the eccentric shaft, the force required by oil absorption is small, the piston is pushed to move through the oil absorption spring, and the oil absorption spring and the eccentric shaft realize the reciprocating movement of the piston. The oil absorption spring makes the piston always press on the eccentric shaft.
When the connecting rod is adopted, the piston moves back and forth along with the eccentric shaft to absorb and press oil.
Furthermore, a motor hole is formed in the cylinder body, the motor hole is communicated with the piston hole, and the motor is fixed in the motor hole.
Through adopting above-mentioned technical scheme, the installation and the protection of motor are convenient for in the motor hole.
Further, the motor comprises a stator and a rotor, the stator is fixed in the motor hole, the rotor is rotatably mounted on the stator, and the eccentric shaft is connected with the rotor.
Through adopting above-mentioned technical scheme, with the motor integration to the cylinder body on, make the space that the motor took little, the structure is compacter.
Further, the motor comprises a fixed cover, wherein the fixed cover is arranged at the top of the motor hole, and the stator is fixed on the fixed cover or the rotor is rotatably arranged on the fixed cover.
Through adopting above-mentioned technical scheme, the installation of stator or rotor is made things convenient for to the fixed lid to can protect the motor.
Furthermore, the motor further comprises a reduction gear set, and the reduction gear set is connected with the motor and the eccentric shaft respectively.
By adopting the technical scheme, the output speed of the motor can be reduced by the reduction gear set, the output torque is improved, reliable thrust is ensured, and the pressure of piston pump oil is improved. Because the pressure of pump oil has been improved, the pneumatic cylinder can also be used for heavy-duty type fork truck.
Further, the piston also comprises a sealing ring which is fixed on the piston or the piston hole
Through adopting above-mentioned technical scheme, the leakproofness between piston and the piston hole has been improved to the sealing ring, reduces the oil leak.
Further, still include pull rod jacking device, pull rod jacking device includes: one end of the jacking rod is movably inserted into the jacking hole of the cylinder body; and the jacking spring is movably sleeved on the jacking rod and used for jacking the pull rod.
The jacking rod is used for jacking the pull rod, so that the pull rod is prevented from impacting the fixed cover under the action of gravity, and the cylinder body and the motor are protected.
Compared with the prior art the utility model discloses following beneficial effect has:
the utility model provides an automatic rising of electronic hydraulic cylinder owner ejector pin, simple structure compactness, convenient to use, main ejector pin rise stably, rise fast, improved work efficiency for fork truck.
Drawings
FIG. 1 is a schematic structural view of an electric hydraulic cylinder for a forklift;
FIG. 2 is a cross-sectional view of an electric hydraulic cylinder for a fork lift truck in which a stator is fixed in the center of a motor hole and an oil suction spring is used;
FIG. 3 is an enlarged view of a portion of FIG. 2 at I;
FIG. 4 is a cross-sectional view of the oil circuit of the cylinder block with the distributor valve, diverter valve and relief valve installed therein;
FIG. 5 is a schematic view of the structure of the cylinder;
FIG. 6 is a cross-sectional view of the oil passage of the cylinder block;
FIG. 7 is a schematic diagram of the distribution structure of the distribution valve, the reversing valve, the pressure relief valve, the oil suction spring, the piston and the eccentric shaft;
FIG. 8 is a cross-sectional view of an electric cylinder for a forklift truck in which a stator is fixed to an inner wall of a motor hole and an oil suction spring is used;
FIG. 9 is an enlarged view of a portion of FIG. 8 at II;
FIG. 10 is a cross-sectional view of an electric cylinder for a forklift truck in which a stator is fixed on an inner wall of a motor hole and an eccentric shaft and a piston are connected using a connecting rod;
FIG. 11 is a schematic view of the reduction gear set coupled to the connecting rod and piston;
fig. 12 is an exploded view of the reduction gear set.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 12, the electric hydraulic cylinder for a forklift includes a ram device 21, an oil discharge device 26, a distribution valve 34, a change valve 32, and a relief valve 31, and further includes: the cylinder body 1, the push rod device 21 and the oil discharge device 26 are arranged on the cylinder body 1, the cylinder body 1 is provided with a piston hole 17 and an oil path, the oil path is respectively communicated with the piston hole 17 and the push rod device 21, and the distribution valve 34, the reversing valve 32 and the pressure release valve 31 are all arranged on the oil path; the piston 41, the piston 41 is movably inserted in the piston hole 17; a piston driving device connected to the piston 41 for driving the piston 41 to reciprocate in the piston hole 17; and the motor is arranged on the cylinder body 1 and is connected with the piston driving device.
The motor passes through piston drive arrangement and drives piston 41 reciprocating motion, and piston 41 inhales the piston hole 17 with the hydraulic oil of oil storage intracavity in the cylinder body 1, then impresses the hydraulic oil in the piston hole 17 to jacking main ejector pin in the ejector pin device 21, realizes the automatic jack-up of main ejector pin, owing to adopt motor drive piston 41, consequently the injection rate of hydraulic oil is fast, and the jack-up is stable, has improved efficiency, simple structure simultaneously, convenient to use.
In the prior art, the pull rod is pressed in a reciprocating mode to pump oil, the pull rod adopts a lever mode for saving labor, the stroke of pressing of the pull rod is long, the required time is long, the lifting speed of the main ejector rod is low, the efficiency is low, the forklift is easy to shake when the pull rod is pressed in a reciprocating mode, the goods are unstable, the motor is adopted to drive the piston 41 to pump oil, although the stroke of the piston 41 is short, the oil pumping amount is small, the reciprocating movement speed of the piston 41 under the driving of the motor is high, the efficiency is high, continuous and stable oil pumping is realized, the main ejector rod is stable when lifted, the pull rod does not need to be moved, the forklift cannot shake, and the safety is high.
The piston drive device includes: an eccentric shaft 46, the eccentric shaft 46 is fixed on the motor and is positioned at one end of the piston 41; and an oil suction spring 40, the oil suction spring 40 is movably installed in the piston hole 17 and is located at the other end of the piston 41, and the oil suction spring 40 is used for pressing the piston 41 to the eccentric shaft 46.
When the oil suction spring 40 is used, the oil suction spring 40 pushes the piston 41 to move to suck oil. The piston 41 is in sliding contact with the eccentric shaft 46, the force required for pressing oil is large, so the piston 41 is pushed to move through the eccentric shaft 46, and the force required for sucking oil is small, so the piston 41 is pushed to move through the oil sucking spring 40, and the oil sucking spring 40 and the eccentric shaft 46 realize the reciprocating movement of the piston 41. The oil sucking spring 40 always presses the piston 41 against the eccentric shaft 46.
Specifically, a motor shaft of the motor is connected to an eccentric shaft 46, and the eccentric shaft 46 is fixed to the cylinder block 1 through a bearing.
In at least one embodiment, the eccentric shaft 46 is provided with a pushing bearing 47, an inner ring of the pushing bearing 47 is fixed on the eccentric shaft 46, and an outer ring is located at one end of the piston 41, that is, the end of one end of the piston 41 is pressed against the outer ring of the pushing bearing 47, so that rolling friction is formed between the eccentric shaft 46 and the piston 41, thereby reducing wear of the piston 41 and the eccentric shaft 46, and improving service life and stability.
The electric hydraulic cylinder for the forklift in the embodiment is formed by transforming the existing hydraulic cylinder, so that the principles of oil pressing and oil returning of the hydraulic cylinder are unchanged, the structural modification is small, the original hole communicated with the plunger rod is changed into a piston hole 17, the piston hole 17 is communicated with a distribution hole 14 and a pressure relief hole 16, a distribution steel ball 33 is movably positioned in the distribution hole 14, two sides of the distribution hole 14 are respectively provided with a reversing hole 13 and an oil outlet hole 15, the oil outlet hole 15 is communicated with a jacking hole 12, a jacking rod device 21 is arranged in the jacking hole 12, the reversing hole 13 is respectively communicated with an oil storage cavity 11 and the pressure relief hole 16, a reversing valve 32 is arranged in the reversing hole 13, a distribution valve 34 is arranged in the reversing hole 15, and a pressure relief valve 31 is arranged in the pressure. Wherein the piston 41 does not block the relief hole 16.
The mandril device 21, the oil discharge device 26, the distribution valve 34, the reversing valve 32 and the pressure relief valve 31 are all existing mature products, and the oil discharge device 26 is used for pushing the reversing valve 32 to enable hydraulic oil to flow back to the oil storage cavity 11.
The rotating speed of the motor is set according to actual conditions, so that the ascending speed of the main ejector rod is stable and reliable, and the high-speed ascending is avoided. The motor can also adopt a speed reducing motor with a speed reducing function.
Example two
The present embodiment is different from the first embodiment in that the piston driving device, as shown in fig. 10 and 11, includes: an eccentric shaft 46, the eccentric shaft 46 is fixed on the motor and is positioned at one end of the piston 41; and a connecting rod 45, wherein two ends of the connecting rod 45 are respectively and rotatably connected with the eccentric shaft 46 and one end of the piston 41.
When the connecting rod 45 is adopted, the piston 41 reciprocates along with the eccentric shaft 46 to suck and press oil.
Specifically, one end of the piston 41 is provided with a first rotating shaft 48, and one end of the connecting rod 45 is rotatably connected to the first rotating shaft 48.
In at least one embodiment, bearings are provided between the eccentric shaft 46 and the connecting rod 45 and between the connecting rod 45 and the piston 41.
EXAMPLE III
On the basis of any one of the above embodiments, as shown in fig. 10 and 11, a sealing ring 42 is further included, and the sealing ring 42 is fixed on the piston 41.
Specifically, the piston 41 is provided with a first fixing groove having a ring shape, and the sealing ring 42 is installed on the first fixing groove, slidably inserted in the piston hole 17, and the sealing ring 42 moves along with the piston 41.
The sealing ring 42 improves the sealing between the piston 41 and the piston hole 17, and reduces oil leakage.
Example four
The difference between this embodiment and the third embodiment is the installation position of the sealing ring 42, as shown in fig. 3 and 9, in this embodiment, the sealing ring 42 is fixed in the piston hole 17, the piston 41 is slidably inserted on the sealing ring 42, and the sealing ring 42 does not move along with the piston 41.
In at least one embodiment, to facilitate the installation of the sealing ring 42, the end of the piston bore 17 is provided with a fixing ring 43, and the fixing ring 43 is threadedly mounted on the end of the piston bore 17. The fixing ring 43 is provided with a straight groove or a cross groove for assembling rotation.
In at least one embodiment, the fixing ring is provided at an inner portion thereof with a second fixing groove, the second fixing groove is provided with a sealing ring 44, the piston 41 is slidably inserted into the sealing ring 44, and the sealing ring 44 enhances a sealing effect.
EXAMPLE five
On the basis of any one of the above embodiments, the cylinder body 1 is provided with a motor hole 19, the motor hole 19 is communicated with the piston hole 17, and the motor is fixed in the motor hole 19.
Specifically, the bottom of the motor hole 19 is provided with a rotating hole 18, the eccentric shaft 46 is positioned in the rotating hole 18, and the diameter of the rotating hole 18 is smaller than that of the motor hole 19, so that the eccentric shaft 46 can be conveniently installed.
The motor hole 19 facilitates the installation and protection of the motor. The motor bore 19 communicates with the piston bore 17 to facilitate connection of the motor to the piston 41.
EXAMPLE six
On the basis of the fifth embodiment, the motor comprises a stator 52 and a rotor 51, the stator 52 is fixed in the motor hole 19, the rotor 51 is rotatably mounted on the stator 52, and the eccentric shaft 46 is connected with the rotor 51.
And the motor further comprises a fixed cover 25, wherein the fixed cover 25 is arranged at the top of the motor hole 19, and the rotor 51 is rotatably arranged on the fixed cover 25.
The fixing cover 25 facilitates the installation of the rotor 51 and protects the motor.
Specifically, as shown in fig. 8 and 10, the stator 52 is fixed on the inner wall of the motor hole 19, the fixed cover 25 is provided with a rotating column 252, the rotating column 252 is coaxially arranged with the stator 52, the rotor 51 is rotatably mounted on the rotating column 252 through a bearing, and the eccentric shaft 46 is fixed on the rotor 51.
Integrate the motor to cylinder body 1 on, make the space that the motor took little, the structure is compacter.
EXAMPLE seven
The present embodiment is different from the sixth embodiment in that, as shown in fig. 2 and 3, the stator 52 is fixed to the rotation column 252, the rotor 51 is connected to the eccentric shaft 46, and the eccentric shaft 46 is rotatably mounted in the motor hole 19 through a bearing.
Specifically, two ends of the eccentric shaft 46 are respectively fixed on the rotating column 252 and the rotating hole 18 through bearings, the eccentric shaft 46 is connected with the rotor 51 through a screw, and the rotor 51 drives the eccentric shaft 46 to rotate.
Example eight
On the basis of any one of the above embodiments, as shown in fig. 10 to 12, a reduction gear set is further included, and the reduction gear set is respectively connected with the motor and the eccentric shaft 46.
The reduction gear set can reduce the output speed of the motor, improve the output torque, ensure reliable thrust and improve the pressure of oil pumped by the piston 41. Because the pressure of pump oil has been improved, the pneumatic cylinder can also be used for heavy-duty type fork truck.
In at least one embodiment, the reduction gear set includes an input gear 71, a first gear 72, a second gear 73, and an output gear 74, the input gear 71 is fixed to the rotor 51, the input gear 71 is engaged with the first gear 72, the second gear 73 is fixed to the first gear 72, the second gear 73 is engaged with the output gear 74, the output gear 74 is fixed to the eccentric shaft 46, one end of the eccentric shaft 46 is rotatably connected to the rotor 51, and the other end is rotatably connected to the rotation hole 18.
The first gear 72 is rotatably mounted on a rotating shaft, one end of the rotating shaft is fixed to the bottom of the motor hole 19, the other end of the rotating shaft is fixed to the connecting plate 64, and the connecting plate 64 is fixed to the motor hole 19. One end of the rotor 51 is rotatably mounted on the rotary post 252 via a bearing, and the other end is rotatably mounted on the connection plate 64 via a bearing.
The number of reduction gears is set as needed, and the number of reduction gears listed in the present embodiment does not limit the number of reduction gears of the reduction gear set.
Example nine
On the basis of any one of the above embodiments, the pull rod jacking device is further included, and the pull rod jacking device includes: the jacking rod 24, one end of the jacking rod 24 is movably inserted into the jacking hole 251 of the cylinder body 1; the jacking spring 23 is movably sleeved on the jacking rod 24 and used for jacking the pull rod.
The jacking rod 24 is used for jacking the pull rod, so that the pull rod is prevented from impacting the fixed cover 25 under the action of gravity, and the cylinder body 1 and the motor are protected.
In at least one embodiment, the top of the jacking rod 24 carries the cap 22.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the claims of the present invention.
Claims (8)
1. Electric hydraulic cylinder for fork truck, including ejector pin device, oil discharge device, distributing valve, switching-over valve and relief valve, its characterized in that still includes:
the cylinder body is provided with a piston hole and an oil way, the oil way is respectively communicated with the piston hole and the mandril device, and the distribution valve, the reversing valve and the pressure release valve are all arranged on the oil way;
the piston is movably inserted in the piston hole;
the piston driving device is connected with the piston and is used for driving the piston to reciprocate in the piston hole; and
and the motor is arranged on the cylinder body and is connected with the piston driving device.
2. The electric hydraulic cylinder for a forklift according to claim 1,
the piston driving device includes:
the eccentric shaft is fixed on the motor and is positioned at one end of the piston; and
the oil absorption spring is movably arranged in the piston hole and is positioned at the other end of the piston, the oil absorption spring is used for pressing the piston to the eccentric shaft, and two ends of the connecting rod are respectively in rotating connection with the eccentric shaft and one end of the piston.
3. The electric hydraulic cylinder for a forklift according to claim 2,
the cylinder body is provided with a motor hole, the motor hole is communicated with the piston hole, and the motor is fixed in the motor hole.
4. The electric hydraulic cylinder for a forklift according to claim 3,
the motor comprises a stator and a rotor, the stator is fixed in the motor hole, the rotor is rotatably installed on the stator, and the eccentric shaft is connected with the rotor.
5. The electric hydraulic cylinder for a forklift according to claim 4,
the motor is characterized by further comprising a fixed cover, wherein the fixed cover is arranged at the top of the motor hole, and the stator is fixed on the fixed cover or the rotor is rotatably arranged on the fixed cover.
6. The electric hydraulic cylinder for a forklift according to claim 2,
the motor is connected with the eccentric shaft through the speed reduction gear set.
7. The electric hydraulic cylinder for a forklift according to claim 1,
the piston further comprises a sealing ring, and the sealing ring is fixed on the piston or the piston hole.
8. The electric hydraulic cylinder for a forklift according to claim 1,
still include pull rod jacking device, pull rod jacking device includes:
one end of the jacking rod is movably inserted into the jacking hole of the cylinder body; and
the jacking spring is movably sleeved on the jacking rod and used for jacking the pull rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022484721.8U CN213416184U (en) | 2020-10-31 | 2020-10-31 | Electric hydraulic cylinder for forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022484721.8U CN213416184U (en) | 2020-10-31 | 2020-10-31 | Electric hydraulic cylinder for forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213416184U true CN213416184U (en) | 2021-06-11 |
Family
ID=76249702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022484721.8U Expired - Fee Related CN213416184U (en) | 2020-10-31 | 2020-10-31 | Electric hydraulic cylinder for forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213416184U (en) |
-
2020
- 2020-10-31 CN CN202022484721.8U patent/CN213416184U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210611 |