CN209940333U - Three-cylinder device for telescopic boom and three-stage telescopic boom - Google Patents
Three-cylinder device for telescopic boom and three-stage telescopic boom Download PDFInfo
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- CN209940333U CN209940333U CN201920590291.2U CN201920590291U CN209940333U CN 209940333 U CN209940333 U CN 209940333U CN 201920590291 U CN201920590291 U CN 201920590291U CN 209940333 U CN209940333 U CN 209940333U
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Abstract
A three-cylinder device for telescopic suspension arm and a three-level telescopic arm are disclosed, the three-cylinder device comprises a first cylinder, a second cylinder and a three-level cylinder, the centers of the first cylinder and the second cylinder respectively penetrate through a first central rod and a second central rod, the first central rod and the second central rod respectively penetrate through a first cylinder piston rod and a second cylinder piston rod, the first central rod is communicated with a rod-free cavity of the first cylinder through a first connecting pipe, a one-way valve is arranged on the first connecting pipe, the first central rod and the second central rod are communicated through a second connecting pipe, a one-way valve is arranged between the second connecting pipe and the first central rod, the second central rod is communicated with the rod-free cavity of the third cylinder through a third connecting pipe, the third connecting pipe is provided with a one-way valve, the second central rod is; the three-stage telescopic boom comprises a first telescopic boom, a second telescopic boom, a third telescopic boom and a three-cylinder device for boom extension, wherein the first telescopic boom, the second telescopic boom and the third telescopic boom are respectively connected with the first cylinder, the second cylinder and the third cylinder. The utility model discloses the structure is ingenious, does not receive load change flexible in proper order, has improved hydro-cylinder pressure, reduces the cost.
Description
Technical Field
The utility model relates to a multistage hydro-cylinder control technical field, concretely says so and relates to flexible three-cylinder device and the tertiary flexible arm of using of davit.
Background
The oil cylinder for the telescopic arm of the existing crane adopts the following two modes:
1. the single oil cylinder mode is used: a first telescopic arm is connected with the oil cylinder, other telescopic arms are driven by the inhaul cable, and all the telescopic arms are driven to stretch while the oil cylinder stretches. The disadvantages of this structure are: (1) all the telescopic arms are simultaneously telescopic and cannot be independently operated and controlled; (2) the hoisting weight is affected, no matter how heavy goods are hoisted, the minimum section of telescopic boom can extend out, and the minimum section of telescopic boom needs to be designed to be thicker to meet the requirement of the maximum hoisting weight, so that the weight of the whole hoisting arm is increased, and the hoisting performance of the hoisting arm is reduced; (3) because the oil cylinder drives the multiple sections of telescopic arms at the same time, the stress of the oil cylinder is increased by multiple times, and the service life of the oil cylinder is shortened;
2. using a two-stage cylinder approach: the first-stage cylinder is connected with the first telescopic arm, the second-stage cylinder is connected with the second telescopic arm, and the rear telescopic arm and the second telescopic arm are simultaneously telescopic through a pull rope. The disadvantages of this structure are: (1) when the telescopic boom has more than three sections, a third telescopic boom and the following telescopic booms need to be driven by a guy cable, the stress of the secondary cylinder is related to the number of sections of the telescopic boom, and the more the number of sections, the larger the stress multiple; (2) when the secondary cylinder extends out, the opening pressure of the sequence valve needs to be overcome, a part of pressure of a hydraulic system is consumed, the thrust of the primary cylinder is reduced, and the load extending capacity is reduced; (3) when the resistance driven by the first-stage cylinder is large and the opening pressure of the sequence valve is reached, the first-stage cylinder and the second-stage cylinder can simultaneously extend out, and the function of sequential extension cannot be realized.
Therefore, the present inventors have made extensive studies to design a three-cylinder device for boom extension and contraction and a three-stage telescopic boom that can solve the above-described problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a davit is flexible with three jar devices and tertiary flexible arm, its structural design is ingenious, does not receive load change to influence can stretch out and draw back in proper order, can improve hydro-cylinder pressure, reduce cost.
In order to realize the scheme, the utility model provides a three-cylinder device for telescopic suspension arm, which comprises a first-stage cylinder, a second-stage cylinder and a third-stage cylinder, wherein the centers of the first-stage cylinder and the second-stage cylinder are respectively penetrated by a first central rod and a second central rod, the first central rod and the second central rod respectively penetrate through the inner cavities of the piston rods of the first-stage cylinder and the second-stage cylinder, the first central rod extends out of the first-stage cylinder and is communicated with the rodless cavity of the first-stage cylinder through a first connecting pipe, a first one-way valve is arranged on the first connecting pipe, the first central rod is communicated with the second central rod through a second connecting pipe, a second one-way valve is arranged between the second connecting pipe and the first central rod, the second central rod extends out of the second-stage cylinder and is communicated with the rodless cavity of the third-stage cylinder through a third connecting pipe, a third one-way valve is arranged on the, and a fourth check valve is arranged on the fourth connecting pipe, and the first central rod is communicated with the first oil inlet pipe.
The utility model discloses flexible three-cylinder device of using of davit, wherein the pole chamber that has of one-level jar advances oil pipe intercommunication with the second, the pole chamber that has of one-level jar has the pole chamber intercommunication through fifth connecting pipe and second grade jar, the pole chamber that has of second grade jar has the pole chamber intercommunication through sixth connecting pipe and tertiary jar, be equipped with first trigger assembly between second grade jar and the first check valve, be equipped with the second between tertiary jar and the third check valve and trigger the subassembly, work as first trigger the subassembly and touch when touching first check valve is opened, work as the second triggers the subassembly and touches the sound and trigger the third check valve is opened.
The utility model discloses flexible three-cylinder device of using of davit, wherein first trigger assembly include first check valve go up the first ejector pin of connecting with the support of connecting on the second grade cylinder body, the suspension end of support is connected with the first piece that hits, the first piece that hits is facing first ejector pin works as during the cylinder body withdrawal of second grade cylinder, first hit the piece with first ejector pin collision will first check valve is opened.
The utility model discloses flexible three-cylinder device of using of davit, wherein the second trigger assembly include the third check valve go up the second ejector pin of connecting with the gyro wheel support of connecting on the tertiary cylinder body, the suspension end of gyro wheel support is connected with the second and hits the piece, the second hits the piece and faces the second ejector pin works as during the cylinder body withdrawal of tertiary cylinder, the second hit the piece with the collision of second ejector pin will the third check valve is opened.
The utility model discloses the flexible three-cylinder device that uses of davit, wherein the cylinder body one end of one-level jar with the piston rod of second grade jar is articulated, the cylinder body one end of second grade jar with the piston rod of tertiary jar is articulated.
A three-stage telescopic boom comprises a first telescopic boom, a second telescopic boom, a third telescopic boom and a three-cylinder device for boom extension, wherein the first telescopic boom is connected with a cylinder body of a first-stage cylinder, the second telescopic boom is connected with a cylinder body of a second-stage cylinder, and the third telescopic boom is connected with a cylinder body of a third-stage cylinder.
After the technical scheme is adopted, the utility model discloses the davit is flexible with three jar devices and tertiary flexible arm has following beneficial effect:
1. three telescopic oil cylinders, namely a primary cylinder, a secondary cylinder and a tertiary cylinder, are adopted, and piston rods of the three telescopic oil cylinders can be completely stretched in sequence, so that a first stretching arm, a second stretching arm and a third stretching arm can be stretched in sequence without being influenced by load change;
2. the thrust of three telescopic oil cylinders, namely a primary cylinder, a secondary cylinder and a tertiary cylinder, is improved, so that the pressure of hydraulic oil is completely used for the movement of each telescopic oil cylinder, and no pressure loss exists;
3. due to the increase of the thrust of the three telescopic oil cylinders, the three telescopic oil cylinders can be designed into a smaller specification, so that the cost is saved;
4. the three telescopic oil cylinders can be used for designing more sections of the suspension arm, and the hoisting radius is larger.
Drawings
Fig. 1 is a schematic perspective view of a three-cylinder device for telescopic boom of the present invention;
fig. 2 is a schematic diagram of the three-cylinder device for telescopic suspension arm of the present invention.
Detailed Description
As shown in figure 1, the three-cylinder device for telescopic suspension arm of the utility model comprises three telescopic oil cylinders, namely a first-stage cylinder 1, a second-stage cylinder 2 and a third-stage cylinder 3, wherein the centers of the first-stage cylinder 1 and the second-stage cylinder 2 are respectively penetrated with a first central rod 4 and a second central rod 5, the first central rod 4 and the second central rod 5 respectively penetrate the inner cavities of the piston rods of the first-stage cylinder 1 and the second-stage cylinder 2, the first central rod 4 extends out of the first-stage cylinder 1 and then is communicated with the rodless cavity of the first-stage cylinder 1 through a first connecting pipe 6, the first connecting pipe 6 is provided with a first one-way valve 7, the first central rod 4 is communicated with the second central rod 5 through a second connecting pipe 8, a second one-way valve 9 is arranged between the second connecting pipe 8 and the first central rod 4, the second central rod 5 extends out of the second-stage cylinder 2 and then is communicated with the rodless cavity of the third-, the second central rod 5 is communicated with a piston rod of the third-stage cylinder 3 through a fourth connecting pipe 12, a fourth one-way valve 13 is arranged on the fourth connecting pipe 12, and the first central rod 4 is communicated with a first oil inlet pipe 14.
The rod chamber of one-level jar 1 and second oil inlet pipe 15 intercommunication, the rod chamber of one-level jar 1 has the rod chamber intercommunication through fifth connecting pipe 16 and second grade jar 2, the rod chamber of second grade jar 2 has the rod chamber intercommunication through sixth connecting pipe 17 and third grade jar 3, be equipped with first trigger subassembly between second grade jar 2 and the first check valve 7, first trigger subassembly includes the first ejector pin 18 of connecting on the first check valve 7 and the welded support 19 of cylinder body afterbody of second grade jar 2. The suspension end of the bracket 19 is connected with a first collision block 20, the first collision block 20 is opposite to the first top rod 18, when the cylinder body of the secondary cylinder 2 retracts, the first collision block 20 collides with the first top rod 18, and the first check valve 7 is opened. And a second trigger assembly is arranged between the third-stage cylinder 3 and the third one-way valve 11 and comprises a second ejector rod 21 connected to the third one-way valve 11 and a roller support 22 welded to the tail of the cylinder body of the third-stage cylinder 3. The suspension end of the roller bracket 22 is connected with a second collision block 23, the second collision block 23 is opposite to the second top rod 21, and when the cylinder body of the three-stage cylinder 3 retracts, the second collision block 23 collides with the second top rod 21 to open the third one-way valve 11.
One end of the first-stage cylinder 1 is hinged with a piston rod of the second-stage cylinder 2 through a pin shaft, and one end of the second-stage cylinder 2 is hinged with a piston rod of the third-stage cylinder 3 through a pin shaft.
The utility model discloses tertiary flexible arm, including one stretch arm, two stretch arms, three stretch arms and the flexible three-cylinder device of using of davit that above-mentioned figure 1 shows, one stretch arm is connected with the cylinder body of one-level jar 1, and two stretch arms are connected with the cylinder body of second grade jar 2, and three stretch arms are connected with the cylinder body of tertiary jar 3.
Referring to fig. 2, the extending process of the three telescopic cylinders is as follows: when a piston of the primary cylinder 1 runs to the stroke end, a second one-way valve 9 is opened, hydraulic oil enters an inner cavity of a second central rod 5 of the secondary cylinder 2, a third one-way valve 11 is opened and enters a rodless cavity of the secondary cylinder 2, so that a piston rod of the secondary cylinder 2 extends out, when the piston of the secondary cylinder 2 runs to the stroke end, a fourth one-way valve 13 is opened, the hydraulic oil enters a rodless cavity of the tertiary cylinder 3, and a piston rod of the tertiary cylinder 3 extends out to the stroke end;
the retraction process of the three telescopic oil cylinders is as follows: hydraulic oil enters a rod cavity of the primary cylinder 1, the rod cavities of the primary cylinder 1, the secondary cylinder 2 and the tertiary cylinder 3 are completely communicated, no hydraulic valve is arranged in the middle, piston rods of the primary cylinder 1, the secondary cylinder 2 and the tertiary cylinder 3 are all in an extending state, the first check valve 7 and the third check valve 11 are in a closing position, the rodless cavity hydraulic oil of the primary cylinder 1 and the secondary cylinder 2 is sealed, the hydraulic oil cannot return, the piston rods of the primary cylinder 1 and the secondary cylinder 2 cannot retract, the hydraulic oil in the rodless cavity of the tertiary cylinder 3 is pushed by a piston of the tertiary cylinder 3, a fourth check valve 13 on the secondary cylinder 2 is opened (when the piston rod of the secondary cylinder is completely extended, the fourth check valve 13 is in an opening state), the hydraulic oil enters an inner cavity of the second central rod 5, a second check valve 9 on the primary cylinder 1 is opened (when the piston rod of the primary cylinder 1 is completely extended, the second check valve 9 is in an opening state), returning oil through the first central rod 4, and retracting a piston rod of the third-stage cylinder 3; when the piston rod of the third-level cylinder 3 is completely retracted, the second collision block 23 arranged on the third-level cylinder 3 presses the second ejector rod 21, the third one-way valve 11 is opened, rodless cavity hydraulic oil of the second-level cylinder 2 enters the inner cavity of the second central rod 5, the second one-way valve 9 on the first-level cylinder 1 is opened (when the piston rod of the first-level cylinder 1 is completely extended, the second one-way valve 9 is in an opening state), oil is returned through the first central rod 4, and the piston rod of the second-level cylinder 2 is retracted; when the piston rod of the secondary cylinder 2 is completely retracted, the first collision block 20 arranged on the secondary cylinder 2 presses the first ejector rod 18, the first one-way valve 7 is opened, the rodless cavity hydraulic oil of the primary cylinder 1 enters the inner cavity of the first central rod 4 for oil return, and the piston rod of the primary cylinder 1 is retracted.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (6)
1. A three-cylinder device for telescopic suspension arm is characterized by comprising a first-stage cylinder, a second-stage cylinder and a third-stage cylinder, wherein a first central rod and a second central rod penetrate through the centers of the first-stage cylinder and the second-stage cylinder respectively, the first central rod and the second central rod penetrate through inner cavities of piston rods of the first-stage cylinder and the second-stage cylinder respectively, the first central rod extends out of the first-stage cylinder and then is communicated with a rodless cavity of the first-stage cylinder through a first connecting pipe, a first one-way valve is arranged on the first connecting pipe, the first central rod is communicated with the second central rod through a second connecting pipe, a second one-way valve is arranged between the second connecting pipe and the first central rod, the second central rod extends out of the second-stage cylinder and then is communicated with the rodless cavity of the third-stage cylinder through a third connecting pipe, a third one-way valve is arranged on the third connecting pipe, and, and a fourth check valve is arranged on the fourth connecting pipe, and the first central rod is communicated with the first oil inlet pipe.
2. The boom extension and contraction three-cylinder device according to claim 1, wherein the rod chamber of the primary cylinder is communicated with a second oil inlet pipe, the rod chamber of the primary cylinder is communicated with the rod chamber of the secondary cylinder through a fifth connecting pipe, the rod chamber of the secondary cylinder is communicated with the rod chamber of the tertiary cylinder through a sixth connecting pipe, a first trigger assembly is arranged between the secondary cylinder and the first check valve, a second trigger assembly is arranged between the tertiary cylinder and the third check valve, the first check valve is triggered to open when the first trigger assembly touches, and the third check valve is triggered to open when the second trigger assembly touches a touch sound.
3. The boom extension and contraction three-cylinder device according to claim 2, wherein the first trigger assembly comprises a first push rod connected to the first check valve and a bracket connected to the cylinder body of the secondary cylinder, a first collision block is connected to the suspension end of the bracket, the first collision block is opposite to the first push rod, and when the cylinder body of the secondary cylinder retracts, the first collision block collides with the first push rod to open the first check valve.
4. The boom extension and contraction three-cylinder device according to claim 2, wherein the second trigger assembly comprises a second ejector rod connected to a third one-way valve and a roller bracket connected to a cylinder body of the third-stage cylinder, a second collision block is connected to a suspension end of the roller bracket, the second collision block faces the second ejector rod, and when the cylinder body of the third-stage cylinder retracts, the second collision block collides with the second ejector rod to open the third one-way valve.
5. The boom extension and contraction three-cylinder device according to claim 1, wherein one end of the cylinder body of the primary cylinder is hinged to the piston rod of the secondary cylinder, and one end of the cylinder body of the secondary cylinder is hinged to the piston rod of the tertiary cylinder.
6. A three-stage telescopic boom, comprising a boom, a secondary boom, a tertiary boom and the three-cylinder device for boom extension of any one of claims 1 to 5, wherein the boom is connected to the cylinder body of the primary cylinder, the secondary boom is connected to the cylinder body of the secondary cylinder, and the tertiary boom is connected to the cylinder body of the tertiary cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920590291.2U CN209940333U (en) | 2019-04-26 | 2019-04-26 | Three-cylinder device for telescopic boom and three-stage telescopic boom |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920590291.2U CN209940333U (en) | 2019-04-26 | 2019-04-26 | Three-cylinder device for telescopic boom and three-stage telescopic boom |
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| CN209940333U true CN209940333U (en) | 2020-01-14 |
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| CN201920590291.2U Active CN209940333U (en) | 2019-04-26 | 2019-04-26 | Three-cylinder device for telescopic boom and three-stage telescopic boom |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109969959A (en) * | 2019-04-26 | 2019-07-05 | 江苏宏昌天马物流装备有限公司 | Three cylinder assemblies of hoisting arm expansion and three-level telescopic arm |
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2019
- 2019-04-26 CN CN201920590291.2U patent/CN209940333U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109969959A (en) * | 2019-04-26 | 2019-07-05 | 江苏宏昌天马物流装备有限公司 | Three cylinder assemblies of hoisting arm expansion and three-level telescopic arm |
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