CN211169737U - Lateral shifter hydraulic system with self-locking function - Google Patents
Lateral shifter hydraulic system with self-locking function Download PDFInfo
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- CN211169737U CN211169737U CN201921491522.0U CN201921491522U CN211169737U CN 211169737 U CN211169737 U CN 211169737U CN 201921491522 U CN201921491522 U CN 201921491522U CN 211169737 U CN211169737 U CN 211169737U
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Abstract
The utility model relates to a side shifter hydraulic system with self-locking function. The hydraulic control system comprises an oil pump, a multi-way valve, a side shifting oil cylinder, a right distance adjusting oil cylinder, a left distance adjusting oil cylinder and a hydraulic oil tank. A first hydraulic lock is arranged on the oil pipeline with the rod cavity and the oil pipeline without the rod cavity of the right distance-adjusting oil cylinder in series, and a second hydraulic lock is arranged on the oil pipeline with the rod cavity and the oil pipeline without the rod cavity of the left distance-adjusting oil cylinder in series; the first hydraulic lock and the second hydraulic lock are identical in structure. When the distance between the two forks does not need to be adjusted, the first hydraulic lock on the oil pipeline of the rod cavity of the right distance-adjusting oil cylinder and the first hydraulic lock on the oil pipeline of the rodless cavity are self-locked, and the second hydraulic lock on the oil pipeline of the rod cavity of the left distance-adjusting oil cylinder and the second hydraulic lock on the oil pipeline of the rodless cavity are self-locked; the position of a second valve core of the multi-way valve is fixed; a recyclable loop cannot be formed between the oil pipeline of the right distance adjusting oil cylinder and the oil pipeline of the left distance adjusting oil cylinder, and sliding between the two forks is effectively prevented.
Description
Technical Field
The utility model relates to a fork truck's hydraulic system, concretely relates to ware pipe-line system is moved to side that can self-lock.
Background
The fork truck mainly adopts the fork to lift the material, realizes the transport of material, and the fork then mainly adopts the connecting cylinder and realizes that whole side is moved and the roll adjustment between the fork through the motion of hydro-cylinder, is the ware roll adjustment fork that moves for the side promptly. The action of the existing side shifter to adjust the spacing of the forks is to laterally shift the forks integrally along with the fork frame or to adjust the spacing between two forks on the fork frame. Because the roll adjustment action of interval between two forks realizes adjustment control through two roll adjustment hydro-cylinders, the oil circuit of two roll adjustment hydro-cylinders is connected each other, and inside forms a circulated return circuit, consequently can take place the problem that two forks remove respectively when the whole side of fork frame moves, this unsafe factor will directly influence the operating efficiency of material handling.
Disclosure of Invention
In order to solve the whole problem that does not take place two forks and remove respectively when moving of side of fork frame, the utility model provides a side shifter hydraulic system with self-locking function.
A hydraulic system of a side shifter with a self-locking function comprises an oil pump 1, a multi-way valve 2, a side shifting oil cylinder 4, a right distance adjusting oil cylinder 51, a left distance adjusting oil cylinder 52 and a hydraulic oil tank 8; the multi-way valve 2 comprises a first valve spool 21 and a second valve spool 22; an oil inlet P of the multi-way valve 2 is communicated with an oil outlet of the oil pump 1; a rodless cavity and a rod cavity of the side shift oil cylinder 4 are respectively communicated with a first working oil port A1 and a second working oil port B1 of the multi-way valve 2; the rod cavity of the right distance-adjusting oil cylinder 51 and the rod cavity of the left distance-adjusting oil cylinder 52 are connected in parallel and then communicated with a third working oil port A2 of the multi-way valve 2, and the rodless cavity of the right distance-adjusting oil cylinder 51 and the rodless cavity of the left distance-adjusting oil cylinder 52 are connected in parallel and then communicated with a fourth working oil port B2 of the multi-way valve 2;
a first hydraulic lock 31 is arranged on the oil pipeline with the rod cavity and the oil pipeline without the rod cavity of the right distance-adjusting oil cylinder 51 in series, and a second hydraulic lock 32 is arranged on the oil pipeline with the rod cavity and the oil pipeline without the rod cavity of the left distance-adjusting oil cylinder 52 in series; the first hydraulic lock 31 comprises two one-way valves, and the first hydraulic lock 31 and the second hydraulic lock 32 are identical in structure;
when the distance between the two forks does not need to be adjusted, the first hydraulic lock 31 on the oil pipeline of the rod cavity of the right distance-adjusting oil cylinder 51 and the oil pipeline of the rodless cavity is self-locked, and the second hydraulic lock 32 on the oil pipeline of the rod cavity of the left distance-adjusting oil cylinder 52 and the oil pipeline of the rodless cavity is self-locked; the position of the second valve core 22 of the multi-way valve 2 is fixed, and a circulatable loop cannot be formed between the oil pipeline of the right distance adjusting oil cylinder 51 and the oil pipeline of the left distance adjusting oil cylinder 52, so that the two forks are effectively prevented from sliding.
The technical scheme for further limiting is as follows:
the first hydraulic lock 31 comprises a first check valve 311 and a second check valve 312, and the two check valves are respectively connected in series to a rod cavity oil line pipeline and a rodless cavity oil line pipeline of the right distance-adjusting oil cylinder 51; an outlet of the first check valve 311 on the rod cavity oil line of the right distance adjusting oil cylinder 51 is respectively communicated with a third working oil port A2 of the multi-way valve 2 and an oil outlet of the second check valve 312, and an outlet of the second check valve 312 on the rod cavity oil line of the right distance adjusting oil cylinder 51 is respectively communicated with a fourth working oil port B2 of the multi-way valve 2 and an oil outlet of the first check valve 311; the second hydraulic lock 32 comprises a third check valve 321 and a fourth check valve 322, and the two check valves are respectively connected in series to a rod cavity oil pipeline and a rodless cavity oil pipeline of the left distance-adjusting oil cylinder 52; an outlet of the third check valve 321 on the rod cavity oil line of the left distance adjusting cylinder 52 is respectively communicated with a third working oil port a2 of the multi-way valve 2 and an oil outlet of the fourth check valve 322, and an outlet of the fourth check valve 322 on the rod cavity oil line of the left distance adjusting cylinder 52 is respectively communicated with a fourth working oil port B2 of the multi-way valve 2 and an oil outlet of the third check valve 321.
An oil suction filter 7 is connected in series with an oil inlet P of the multi-way valve 2, and an oil return filter 6 is connected in series with an oil return port T.
The hydraulic oil tank 8 is provided with a breather 9.
The beneficial technical effects of the utility model are embodied in the following aspects:
1. the utility model is simple in operation convenient, can control right roll adjustment hydro-cylinder and left roll adjustment hydro-cylinder through controlling the multiple unit valve, and then realize the action of two forks.
2. The hydraulic system of the utility model has simple pipeline connection and high working reliability; when two valve cores of the multi-way valve are positioned at the middle position, the right distance adjusting oil cylinder and the left distance adjusting oil cylinder can be automatically locked, two forks cannot move, and the fork frame can integrally move.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Number in fig. 1: the hydraulic control system comprises an oil pump 1, a multi-way valve 2, a first valve spool 21, a second valve spool 22, a first hydraulic lock 31, a first one-way valve 311, a second one-way valve 312, a second hydraulic lock 32, a third one-way valve 321, a fourth one-way valve 322, a side shift oil cylinder 4, a right distance adjusting oil cylinder 51, a left distance adjusting oil cylinder 52, an oil return filter 6, an oil suction filter 7, a hydraulic oil tank 8 and a breather 9.
Detailed Description
The invention will now be further described by way of example with reference to the accompanying drawings.
Referring to fig. 1, a hydraulic system of a side shifter with a self-locking function includes an oil pump 1, a multi-way valve 2, a side shift cylinder 4, a right distance-adjusting cylinder 51, a left distance-adjusting cylinder 52, and a hydraulic oil tank 8. A breather 9 is arranged on the hydraulic oil tank 8.
The multiple valve 2 includes a first spool 21 and a second spool 22; an oil suction filter 7 is connected in series with an oil inlet P of the multi-way valve 2, and an oil return filter 6 is connected in series with an oil return port T. An oil inlet P of the multi-way valve 2 is communicated with an oil outlet of the oil pump 1; a rodless cavity and a rod cavity of the side shift oil cylinder 4 are respectively communicated with a first working oil port A1 and a second working oil port B1 of the multi-way valve 2; the rod cavity of the right distance-adjusting cylinder 51 and the rod cavity of the left distance-adjusting cylinder 52 are connected in parallel and then communicated with a third working oil port A2 of the multi-way valve 2, and the rodless cavity of the right distance-adjusting cylinder 51 and the rodless cavity of the left distance-adjusting cylinder 52 are connected in parallel and then communicated with a fourth working oil port B2 of the multi-way valve 2.
A first hydraulic lock 31 is arranged in series on a rod cavity oil line pipeline and a rodless cavity oil line pipeline of the right distance-adjusting oil cylinder 51, and a second hydraulic lock 32 is arranged in series on a rod cavity oil line pipeline and a rodless cavity oil line pipeline of the left distance-adjusting oil cylinder 52; the first hydraulic lock 31 and the second hydraulic lock 32 are identical in structure.
The first hydraulic lock 31 comprises a first check valve 311 and a second check valve 312, and the two check valves are respectively connected in series to a rod cavity oil line pipeline and a rodless cavity oil line pipeline of the right distance-adjusting oil cylinder 51; an outlet of the first check valve 311 on the rod cavity oil line of the right distance adjusting oil cylinder 51 is respectively communicated with a third working oil port A2 of the multi-way valve 2 and an oil outlet of the second check valve 312, and an outlet of the second check valve 312 on the rod cavity oil line of the right distance adjusting oil cylinder 51 is respectively communicated with a fourth working oil port B2 of the multi-way valve 2 and an oil outlet of the first check valve 311; the second hydraulic lock 32 comprises a third check valve 321 and a fourth check valve 322, and the two check valves are respectively connected in series to a rod cavity oil pipeline and a rodless cavity oil pipeline of the left distance-adjusting oil cylinder 52; an outlet of the third check valve 321 on the rod cavity oil line of the left distance adjusting cylinder 52 is respectively communicated with a third working oil port a2 of the multi-way valve 2 and an oil outlet of the fourth check valve 322, and an outlet of the fourth check valve 322 on the rod cavity oil line of the left distance adjusting cylinder 52 is respectively communicated with a fourth working oil port B2 of the multi-way valve 2 and an oil outlet of the third check valve 321.
The working principle of the utility model is explained as follows:
when the distance between the two forks does not need to be adjusted, the first hydraulic lock 31 on the oil pipeline of the rod cavity of the right distance-adjusting oil cylinder 51 and the oil pipeline of the rodless cavity is self-locked, and the second hydraulic lock 32 on the oil pipeline of the rod cavity of the left distance-adjusting oil cylinder 52 and the oil pipeline of the rodless cavity is self-locked; the position of the second valve core 22 of the multi-way valve 2 is fixed, and a circulatable loop cannot be formed between the oil pipeline of the right distance adjusting oil cylinder 51 and the oil pipeline of the left distance adjusting oil cylinder 52, so that the two forks are effectively prevented from sliding.
When the distance between two forks needs to be reduced, the position of the second valve core 22 of the multi-way valve 2 moves downwards, the third working oil port a2 of the multi-way valve 2 discharges oil, and the oil flows to the rod cavities of the right distance adjusting oil cylinder 51 and the left distance adjusting oil cylinder 52 through the first check valve 311 and the third check valve 321, so that the piston rods of the oil cylinders are pushed and the forks are driven to move, and the distance between the forks is reduced. Meanwhile, the oil in the rodless chambers of the right and left pitch cylinders 51 and 52 flows back to the fourth working port B2 of the multi-way valve 2 through the second check valve 312 and the fourth check valve 322.
When the distance between two forks needs to be increased, the position of the second valve core 22 of the multi-way valve 2 moves upwards, and the fourth working oil port B2 of the multi-way valve 2 discharges oil, and the oil flows to the rodless cavities of the right distance adjusting cylinder 51 and the left distance adjusting cylinder 52 through the second check valve 312 and the fourth check valve 322, so as to push the piston rods of the cylinders and drive the forks to move, and the distance between the forks is increased. Meanwhile, the oil in the rod chambers of the right and left distance adjusting cylinders 51 and 52 flows back to the third working port a2 of the multi-way valve 2 through the first check valve 311 and the third check valve 321.
When the fork needs to move leftwards integrally, the position of the first valve core 21 of the multi-way valve 2 moves downwards, the first working oil port A1 of the multi-way valve discharges oil and leads to a rodless cavity of the side-shifting oil cylinder 4, and a piston rod is pushed to drive the two forks to move leftwards simultaneously.
When the fork needs to move rightwards integrally, the position of the first valve core 21 of the multi-way valve 2 moves upwards, the second working oil port B1 of the multi-way valve discharges oil and leads to the rod cavity of the side-shifting oil cylinder 4, and the piston rod is pushed and drives the two forks to move rightwards simultaneously.
Claims (4)
1. A hydraulic system of a side shifter with a self-locking function comprises an oil pump (1), a multi-way valve (2), a side shifting oil cylinder (4), a right distance adjusting oil cylinder (51), a left distance adjusting oil cylinder (52) and a hydraulic oil tank (8); the multi-way valve (2) comprises a first valve spool (21) and a second valve spool (22); an oil inlet P of the multi-way valve (2) is communicated with an oil outlet of the oil pump (1); a rodless cavity and a rod cavity of the side shift oil cylinder (4) are respectively communicated with a first working oil port A1 and a second working oil port B1 of the multi-way valve (2); a rod cavity of the right distance-adjusting oil cylinder (51) and a rod cavity of the left distance-adjusting oil cylinder (52) are connected in parallel and then communicated with a third working oil port A2 of the multi-way valve (2), and a rodless cavity of the right distance-adjusting oil cylinder (51) and a rodless cavity of the left distance-adjusting oil cylinder (52) are connected in parallel and then communicated with a fourth working oil port B2 of the multi-way valve (2); the method is characterized in that:
a first hydraulic lock (31) is arranged on a rod cavity oil way pipeline and a rodless cavity oil way pipeline of the right distance-adjusting oil cylinder (51) in series, and a second hydraulic lock (32) is arranged on a rod cavity oil way pipeline and a rodless cavity oil way pipeline of the left distance-adjusting oil cylinder (52) in series; the first hydraulic lock (31) comprises two one-way valves, and the first hydraulic lock (31) and the second hydraulic lock (32) are identical in structure; when the distance between the two forks does not need to be adjusted, the oil pipeline of the rod cavity of the right distance-adjusting oil cylinder (51) and the first hydraulic lock (31) on the oil pipeline of the rodless cavity are self-locked, and the oil pipeline of the rod cavity of the left distance-adjusting oil cylinder (52) and the second hydraulic lock (32) on the oil pipeline of the rodless cavity are self-locked; the position of a second valve core (22) of the multi-way valve (2) is fixed, a circulative loop cannot be formed between the oil pipeline of the right distance adjusting oil cylinder (51) and the oil pipeline of the left distance adjusting oil cylinder (52), and the two forks are effectively prevented from sliding.
2. The hydraulic system of the side shifter with the self-locking function according to claim 1, characterized in that: the first hydraulic lock (31) comprises a first check valve (311) and a second check valve (312), and the two check valves are respectively connected in series on a rod cavity oil line pipeline and a rodless cavity oil line pipeline of the right distance-adjusting oil cylinder (51); an outlet of a first check valve (311) on a rod cavity oil way pipeline of the right distance adjusting oil cylinder (51) is respectively communicated with a third working oil port A2 of the multi-way valve (2) and an oil outlet of a second check valve (312), and an outlet of the second check valve (312) on a rodless cavity oil way pipeline of the right distance adjusting oil cylinder (51) is respectively communicated with a fourth working oil port B2 of the multi-way valve (2) and an oil outlet of the first check valve (311); the second hydraulic lock (32) comprises a third one-way valve (321) and a fourth one-way valve (322), and the two one-way valves are respectively connected in series on a rod cavity oil pipeline and a rodless cavity oil pipeline of the left distance-adjusting oil cylinder (52); an outlet of a third check valve (321) on a rod cavity oil way pipeline of the left distance-adjusting oil cylinder (52) is respectively communicated with a third working oil port A2 of the multi-way valve (2) and an oil outlet of a fourth check valve (322), and an outlet of the fourth check valve (322) on a rodless cavity oil way pipeline of the left distance-adjusting oil cylinder (52) is respectively communicated with a fourth working oil port B2 of the multi-way valve (2) and an oil outlet of the third check valve (321).
3. The hydraulic system of the side shifter with the self-locking function according to claim 1, characterized in that: an oil suction filter (7) is connected in series to an oil inlet P of the multi-way valve (2), and an oil return filter (6) is connected in series to an oil return port T.
4. The hydraulic system of the side shifter with the self-locking function according to claim 1, characterized in that: the hydraulic oil tank (8) is provided with a breather (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921491522.0U CN211169737U (en) | 2019-09-09 | 2019-09-09 | Lateral shifter hydraulic system with self-locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921491522.0U CN211169737U (en) | 2019-09-09 | 2019-09-09 | Lateral shifter hydraulic system with self-locking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211169737U true CN211169737U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921491522.0U Active CN211169737U (en) | 2019-09-09 | 2019-09-09 | Lateral shifter hydraulic system with self-locking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211169737U (en) |
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2019
- 2019-09-09 CN CN201921491522.0U patent/CN211169737U/en active Active
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