CN210623268U - Centering oil cylinder with bidirectional buffering function and crane - Google Patents
Centering oil cylinder with bidirectional buffering function and crane Download PDFInfo
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- CN210623268U CN210623268U CN201921556519.2U CN201921556519U CN210623268U CN 210623268 U CN210623268 U CN 210623268U CN 201921556519 U CN201921556519 U CN 201921556519U CN 210623268 U CN210623268 U CN 210623268U
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Abstract
The utility model relates to an engineering vehicle technical field, in particular to centering hydro-cylinder and hoist of two-way buffering in area. The centering oil cylinder with the bidirectional buffer comprises a cylinder body, a first piston, a second piston and a piston rod, wherein the cylinder body comprises a first cavity, a second cavity and a centering section arranged between the first cavity and the second cavity; be equipped with first cushion chamber between piston rod and the first piston, be equipped with the second cushion chamber between piston rod and the second piston, first cushion chamber and second cushion chamber all communicate with the oil return runner, and first cushion chamber and second cushion chamber all are full of fluid. The centering oil cylinder with the bidirectional buffering function can realize buffering protection on the piston rod in the centering process, so that tail flicking is avoided.
Description
Technical Field
The utility model relates to an engineering vehicle technical field, in particular to centering hydro-cylinder and hoist of two-way buffering in area.
Background
The automobile crane needs to meet the flexibility of a vehicle by means of multi-axle steering, and when the automobile crane runs at a high speed, the rear axle is locked at a middle position by a centering oil cylinder with bidirectional buffering to keep running straight. In the related art, a centering cylinder with bidirectional buffering is generally used as shown in fig. 1, and the centering cylinder with bidirectional buffering includes a cylinder bottom 1, a cylinder barrel 2, a guide sleeve 3, a left pipeline 4, a right pipeline 5, a first passage 6, a second passage 7, a left piston 8, a right piston 9, and a piston rod 10.
Wherein, the cylinder bottom 1 sets up in the one end of cylinder in order to seal cylinder 2, and uide bushing 3 sets up the other end at cylinder 2, forms left cavity and right cavity in the cylinder 2, and left piston 8 slides and establishes in left cavity, and right piston 9 slides and establishes in right cavity, and the one end of piston rod 10 is located between left piston 8 and the right piston 9, and the other end passes uide bushing 3 and stretches out outside cylinder 2 to be connected with the rear axle. The left pipeline 4, the right pipeline 5 and the first passage 6 are all arranged outside the cylinder barrel 2, one end of the left pipeline 4 is communicated with the left cavity, the other end of the left pipeline is communicated with the first passage 6, one end of the right pipeline 5 is communicated with the right cavity, the other end of the right pipeline is communicated with the first passage 6, the second passage 7 is arranged in the cylinder barrel 2, one end of the second passage is communicated with the left cavity and the right cavity, and the other end of the second passage is communicated with an external oil return pipeline.
The working principle of the centering oil cylinder with the bidirectional buffer is as follows: when the automobile crane turns, the hydraulic oil in the first passage 6 and the second passage 7 has no pressure, and the left piston 8, the right piston 9 and the piston rod 10 are in a free state, namely the left piston 8 is positioned at a certain position of a left chamber, the right piston 9 is positioned at a certain position of a right chamber, and the piston rod 10 moves left or right; when the crane goes straight, high-pressure oil enters the first passage 6, low-pressure oil returns through the second passage 7, and high-pressure is equal because the left pipeline 4 and the right pipeline 5 are communicated, so that the left piston 8, the right piston 9 and the piston rod 10 are pushed to reach the middle position of the cylinder barrel 2 shown in fig. 1, and centering is completed.
There are problems in that: when high-pressure oil enters a left pipeline, if a piston rod is in a left cavity, and a left piston pushes the piston rod to move right to reach a centering position before the piston rod moves right, the piston rod keeps inertia and collides with the right piston to move left to move reversely, so that the automobile is easy to generate impact abnormal sound to cause the tail flicking of the automobile; similarly, the same situation applies when the piston rod moves to the right chamber and the right piston pushes the piston rod to move left to reach the centering position.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a take centering hydro-cylinder and hoist of two-way buffering to solve the technical problem of the mobile crane centering drift among the prior art.
The utility model provides a centering oil cylinder with bidirectional buffering, including cylinder body, first piston, second piston and piston rod, the cylinder body includes first cavity, second cavity and sets up the centering section between the first cavity with the second cavity, first piston slides and establishes in the first cavity, the second piston slides and establishes in the second cavity, one end setting of piston rod is in between first piston and the second piston, be equipped with the oil return runner to the middle section;
the piston rod with be equipped with first cushion chamber between the first piston, the piston rod with be equipped with the second cushion chamber between the second piston, first cushion chamber with the second cushion chamber all with oil return runner intercommunication, first cushion chamber with the second cushion intracavity all is full of fluid.
Further, one end of the first piston, which is close to the piston rod, is provided with a groove to form the first buffer cavity.
Furthermore, a first gap is formed between the outer peripheral surface of one end, close to the first piston, of the piston rod and the inner peripheral surface of the first buffer cavity, and the first gap is communicated with the first buffer cavity and the oil return flow passage.
Furthermore, one end, close to the first piston, of the piston rod is provided with a first flow guide piece, and the first flow guide piece is used for guiding oil in the first buffer cavity to the first gap.
Further, the first flow guide part is a chamfer arranged at one end of the piston rod close to the first piston.
Further, one end of the second piston, which is close to the piston rod, is provided with a groove to form the second buffer cavity.
Further, a second gap is formed between the outer peripheral surface of one end, close to the second piston, of the piston rod and the inner peripheral surface of the second buffer cavity, and the second gap is communicated with the second buffer cavity and the oil return flow channel.
Furthermore, a second flow guide part is arranged at one end, close to the second piston, of the piston rod and used for guiding oil in the second buffer cavity to the second gap.
Further, the second flow guide part is a chamfer arranged at one end of the piston rod close to the second piston.
The utility model provides a crane, including the centering hydro-cylinder of above-mentioned two-way buffering in area.
The utility model provides a centering hydro-cylinder with bidirectional buffering, including jar body, first piston, second piston and piston rod, the jar body includes first cavity, second cavity and sets up the centering section between first cavity and second cavity, and first piston slides and establishes in first cavity, and second piston slides and establishes in the second cavity, and the one end of piston rod sets up between first piston and second piston, and the centering section is equipped with the oil return runner; be equipped with first cushion chamber between piston rod and the first piston, be equipped with the second cushion chamber between piston rod and the second piston, first cushion chamber and second cushion chamber all communicate with the oil return runner, and first cushion chamber and second cushion chamber all are full of fluid.
When the crane with the bidirectional buffering centering oil cylinder provided by the utility model is used for centering after steering, high-pressure oil enters the first pipeline and the second pipeline, if the piston rod is in the first cavity, the high-pressure oil in the first cavity can push the first piston to move towards the direction close to the middle section, so that the piston rod is pushed to move towards the direction close to the middle section, and the high-pressure oil in the second cavity can push the second piston to move towards the direction close to the middle section; at the moment, oil in the first buffer cavity between the piston rod and the first piston has certain resistance to the piston rod, the oil is slowly discharged, and the piston rod slowly approaches to the middle section, so that the movement of the piston rod is decelerated, and the piston rod is prevented from colliding with the first piston; even if the piston rod reaches the centering position firstly, when the piston rod keeps inertia to continue moving, oil in a second buffer cavity between the piston rod and the second piston can only be slowly discharged due to difficulty in discharging, certain pressure exists to further reduce the speed of the piston rod, so that the piston rod can be prevented from colliding with the second piston to form impact, the piston rod is prevented from moving reversely, and then tail flicking and tire grinding are prevented.
Similarly, in the centering process, if the piston rod is located in the second chamber, the high-pressure oil in the second chamber pushes the second piston to move towards the direction close to the centering section, so that the piston rod is pushed to move towards the direction close to the centering section, and the high-pressure oil in the first chamber pushes the first piston to move towards the direction close to the centering section; at the moment, oil in a second buffer cavity between the piston rod and the second piston has certain resistance to the piston rod, the oil is slowly discharged, and the piston rod slowly approaches to the middle section, so that the movement of the piston rod is decelerated, and the piston rod is prevented from colliding with the first piston; even if the piston rod reaches the centering position firstly, when the piston rod keeps inertia to continue moving, oil in the first buffer cavity between the piston rod and the first piston can only be slowly discharged due to difficulty in discharging, certain pressure exists to further reduce the speed of the piston rod, so that the piston rod can be prevented from colliding with the first piston to form impact, the piston rod is prevented from moving reversely, and then tail flicking and tire grinding are prevented.
The utility model provides a take centering hydro-cylinder of two-way buffering can realize the buffer protection to the piston rod at the centering in-process to avoid piston rod and first piston or second piston to bump, lead to piston rod reverse motion, thereby avoid the drift.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic structural diagram of a centering cylinder with bidirectional buffering in the related art;
fig. 2 is a schematic structural diagram of a centering oil cylinder with bidirectional buffering according to an embodiment of the present invention;
fig. 3 is a partial enlarged view of the centering cylinder with the double cushion shown in fig. 2.
In the figure: 10-cylinder body; 20-a first piston; 30-a second piston; 40-a first chamber; 50-a second chamber; 60-pairs of middle sections; 70-an oil return flow channel; 80-a first gap; 90-a second gap; 100-a first flow guide; 110-a second flow guide; 120-a piston rod; 130-a first buffer chamber; 140-a second buffer chamber; 01-a first pipeline; 02-second line.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 2 and 3, the utility model provides a centering cylinder with bidirectional buffering, including cylinder body 10, first piston 20, second piston 30 and piston rod 120, cylinder body 10 includes first cavity 40, second cavity 50 and centering section 60 who sets up between first cavity 40 and second cavity 50, first piston 20 slides and establishes in first cavity 40, second piston 30 slides and establishes in second cavity 50, one end of piston rod 120 sets up between first piston 20 and second piston 30, centering section 60 is equipped with oil return runner 70; a first buffer chamber 130 is arranged between the piston rod 120 and the first piston 20, a second buffer chamber 140 is arranged between the piston rod 120 and the second piston 30, the first buffer chamber 130 and the second buffer chamber 140 are both communicated with the oil return flow passage 70, and the first buffer chamber 130 and the second buffer chamber 140 are both filled with oil.
In the centering process of the crane using the centering oil cylinder with the bidirectional buffer provided by the embodiment after steering, high-pressure oil enters the first pipeline and the second pipeline, if the piston rod 120 is in the first chamber 40, the high-pressure oil in the first chamber 40 can push the first piston 20 to move towards the direction close to the centering section 60, so as to push the piston rod 120 to move towards the direction close to the centering section 60, and the high-pressure oil in the second chamber 50 can push the second piston 30 to move towards the direction close to the centering section 60; at this time, the oil in the first buffer chamber 130 between the piston rod 120 and the first piston 20 has a certain resistance to the piston rod 120, the oil is slowly discharged, and the piston rod 120 slowly approaches the middle section 60, so that the piston rod 120 is decelerated during movement, and the piston rod 120 is prevented from colliding with the first piston 20; even if the piston rod 120 reaches the centering position first, when the piston rod 120 keeps inertia to continue moving, oil in the second buffer cavity 140 between the piston rod 120 and the second piston 30 can only be slowly discharged due to difficulty in discharging, and a certain pressure exists to further decelerate the piston rod 120, so that impact caused by collision between the piston rod 120 and the second piston 30 can be avoided, reverse movement of the piston rod 120 is avoided, and then tail flicking and tire abrasion are prevented.
Similarly, in the centering process, if the piston rod 120 is located in the second chamber 50, the high-pressure oil in the second chamber 50 will push the second piston 30 to move toward the centering section 60, so as to push the piston rod 120 to move toward the centering section 60, and the high-pressure oil in the first chamber 40 will push the first piston 20 to move toward the centering section 60; at this time, the oil in the second buffer chamber 140 between the piston rod 120 and the second piston 30 has a certain resistance to the piston rod 120, the oil is slowly discharged, and the piston rod 120 slowly approaches the middle section 60, so that the piston rod 120 is decelerated during movement, and the piston rod 120 is prevented from colliding with the first piston 20; even if the piston rod 120 reaches the centering position first, when the piston rod 120 keeps inertia to continue moving, oil in the first buffer chamber 130 between the piston rod 120 and the first piston 20 can only be slowly discharged due to difficulty in discharging, and a certain pressure exists to further decelerate the piston rod 120, so that impact caused by collision between the piston rod 120 and the first piston 20 can be avoided, reverse movement of the piston rod 120 is avoided, and then tail flicking and tire abrasion are prevented.
The utility model provides a take centering hydro-cylinder of two-way buffering can realize the buffer protection to piston rod 120 at the centering in-process to avoid piston rod 120 and first piston 20 or second piston 30 to collide, lead to piston rod 120 reverse motion, thereby avoid the drift.
It should be noted that when the first piston 20, the piston rod 120 and the second piston 30 are all located at the middle alignment section 60, for example, at the middle position of the cylinder body 10, the crane completes the alignment. Preferably, a stop, such as a step, is provided at each end of the middle section 60 to stop the first piston 20 and the second piston 30, respectively.
Oil can be added into the first buffer cavity 130 and the second buffer cavity 140 in advance, so that the oil is ensured to be contained in the first buffer cavity 130 and the second buffer cavity 140 during the operation of the centering oil cylinder with bidirectional buffering. Once the centering oil cylinder with the bidirectional buffer starts to work, the high-pressure oil in the first chamber 40 or the second chamber 50 correspondingly enters the first buffer cavity 130 or the second buffer cavity 140 after working and pressure relief, so as to ensure that the first buffer cavity 130 and the second buffer cavity 140 are filled with the oil.
The first chamber may be in communication with an external oil supply through a first conduit 01 and the second chamber may be in communication with an external oil supply through a second conduit 02.
Among them, the form of forming the first buffer chamber 130 may be various, for example: first chamber 40 is divided into a first sub-chamber located on a side of first piston 20 distal from centering segment 60 and a second sub-chamber located on a side of first piston 20 proximal to centering segment 60.
As an alternative, as shown in fig. 3, one end of the first piston 20 near the piston rod 120 is provided with a groove to form a first buffer chamber 130. Correspondingly, the piston rod 120 is provided with a first protrusion to match with the groove on the first piston 20, the first protrusion can be slidably arranged in the groove of the first piston 20, the structure facilitates the processing and arrangement of the cylinder body 10, and the matching of the groove on the first piston 20 and the first protrusion on the piston rod 120 is easy to realize, so that the processing is further facilitated.
On the basis of the above embodiments, there are various ways to communicate the first buffer cavity 130 with the oil return flow passage 70, for example, a first communication hole is provided on the piston rod 120, one end of the first communication hole is communicated with the first buffer cavity 130, and the other end is communicated with the oil return flow passage 70, and the first communication hole may be S-shaped or L-shaped; or a first notch is arranged at one end of the piston rod 120 close to the first piston 20, one end of the first notch is communicated with the first buffer cavity 130, and the other end of the first notch is communicated with the oil return flow passage 70.
Alternatively, as shown in fig. 3, a first gap 80 is provided between an outer circumferential surface of one end of the piston rod 120 near the first piston 20 and an inner circumferential surface of the first buffer chamber 130, and the first gap 80 communicates with both the first buffer chamber 130 and the oil return flow passage 70.
In this embodiment, a first gap 80 is provided between an outer circumferential surface of one end of the piston rod 120 close to the first piston 20 and an inner circumferential surface of the groove of the first piston 20, the first gap 80 communicates the first buffer chamber 130 with the oil return flow passage 70, on one hand, the processing is convenient, on the other hand, the first gap 80 can realize that the first buffer chamber 130 communicates with the oil return flow passage 70 everywhere, so that the oil can flow conveniently, on the other hand, the first gap 80 can realize that the oil in the first buffer chamber 130 slowly enters the oil return flow passage 70, further, the piston rod 120, the first piston 20 or the second piston 30 is slow and stable in the process of reaching the middle position, and the impact is avoided, thereby avoiding the tail flicking of the crane.
As shown in fig. 3, in the above embodiment, a first flow guiding member 100 is disposed at an end of the piston rod 120 close to the first piston 20, and the first flow guiding member 100 is used for guiding the oil in the first buffer chamber 130 to the first gap 80.
In this embodiment, the first guide member 100 can curve the oil flow rate, so that the moving speed of the piston rod 120 is decreased smoothly.
The first flow guide member 100 may be in various structural forms, such as: the first flow guiding element 100 is an oblique notch disposed on the edge of the piston rod 120 close to the first piston 20, a first end of the oblique notch is communicated with the first buffer cavity 130, and the other end of the oblique notch is communicated with the first gap 80, and the first end of the oblique notch is closer to the piston rod 120 than the first end thereof.
As an alternative, the first baffle 100 is a chamfer provided at an end of the piston rod 120 near the first piston 20. The structure is simple, and the processing and the manufacturing are easy.
Further, on the basis of the above embodiments, the form of forming the second buffer chamber 140 may be various, for example: the second chamber 50 is divided into a second sub-chamber located on the side of the second piston 30 remote from the opposing section 60 and a second sub-chamber located on the side of the second piston 30 adjacent to the opposing section 60.
As an alternative, as shown in fig. 3, one end of the second piston 30 near the piston rod 120 is provided with a groove to form a second buffer chamber 140. Correspondingly, the piston rod 120 is provided with a second protrusion to match with the groove on the second piston 30, the second protrusion can be slidably arranged in the groove of the second piston 30, the structure facilitates the processing and arrangement of the cylinder body 10, and the matching of the groove on the second piston 30 and the second protrusion on the piston rod 120 is easy to realize, so that the processing is further facilitated.
On the basis of the above embodiments, there are various ways to communicate the second buffer chamber 140 with the oil return flow channel 70, for example, a second communication hole is provided on the piston rod 120, one end of the second communication hole communicates with the second buffer chamber 140, and the other end communicates with the oil return flow channel 70, and the second communication hole may be S-shaped or L-shaped; or a second notch is arranged at one end of the piston rod 120 close to the second piston 30, one end of the second notch is communicated with the second buffer cavity 140, and the other end is communicated with the oil return flow channel 70.
Alternatively, as shown in fig. 3, a second gap 90 is provided between an outer circumferential surface of one end of the piston rod 120 near the second piston 30 and an inner circumferential surface of the second surge chamber 140, and the second gap 90 communicates with both the second surge chamber 140 and the oil return flow passage 70.
In this embodiment, a second gap 90 is provided between the outer circumferential surface of the end of the piston rod 120 close to the second piston 30 and the inner circumferential surface of the groove of the second piston 30, the second gap 90 communicates the second buffer cavity 140 with the oil return flow channel 70, on one hand, the processing is convenient, on the other hand, the second gap 90 can realize that the second buffer cavity 140 communicates with the oil return flow channel 70 everywhere, so as to facilitate the circulation of oil, on the other hand, the second gap 90 can realize that the oil in the second buffer cavity 140 slowly enters the oil return flow channel 70, further, the piston rod 120, the second piston 30 or the second piston 30 is slow and stable in the process of reaching the middle position, so as to avoid the impact, thereby avoiding the tail flicking of the crane.
As shown in fig. 3, in addition to the above embodiment, a second flow guiding member 110 is disposed at an end of the piston rod 120 close to the second piston 30, and the second flow guiding member 110 is used for guiding the oil in the second buffer chamber 140 to the second gap 90.
In this embodiment, the second guide member 110 can curve the oil flow, so that the moving speed of the piston rod 120 is decreased smoothly.
The second flow guide element 110 may be in various structural forms, for example: the second flow guiding element 110 is an oblique notch disposed on the edge of the piston rod 120 close to the second piston 30, a first end of the oblique notch is communicated with the second buffer cavity 140, and the other end is communicated with the second gap 90, and the first end of the oblique notch is closer to the piston rod 120 than the first end thereof.
Alternatively, the second baffle 110 is a chamfer provided at an end of the piston rod 120 adjacent to the second piston 30. The structure is simple, and the processing and the manufacturing are easy.
The utility model provides a crane, including the above-mentioned centering hydro-cylinder of taking two-way buffering, still include the rear axle, the one end that first piston 20 was kept away from to piston rod 120 stretches out jar body 10 and rear axle and is connected. In this embodiment, the centering cylinder with bidirectional buffering can avoid collision and impact of the piston rod 120 with the first piston 20 and the second piston 30, so that the crane provided by this embodiment is centered stably, and the tail flicking condition is avoided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Furthermore, those skilled in the art will appreciate that while some of the embodiments described above include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, any of the claimed embodiments may be used in any combination. Additionally, the information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. The centering oil cylinder with the bidirectional buffering function comprises a cylinder body (10), a first piston (20), a second piston (30) and a piston rod (120), wherein the cylinder body (10) comprises a first cavity (40), a second cavity (50) and a centering section (60) arranged between the first cavity (40) and the second cavity (50), the first piston (20) is arranged in the first cavity (40) in a sliding mode, the second piston (30) is arranged in the second cavity (50) in a sliding mode, one end of the piston rod (120) is arranged between the first piston (20) and the second piston (30), and an oil return flow channel (70) is arranged in the centering section (60);
the piston rod is characterized in that a first buffer cavity (130) is arranged between the piston rod (120) and the first piston (20), a second buffer cavity (140) is arranged between the piston rod (120) and the second piston (30), the first buffer cavity (130) and the second buffer cavity (140) are communicated with the oil return flow channel (70), and oil is filled in the first buffer cavity (130) and the second buffer cavity (140).
2. The centering cylinder with bidirectional damping as claimed in claim 1, characterized in that an end of the first piston (20) near the piston rod (120) is recessed to form the first damping chamber (130).
3. The centering cylinder with the bidirectional buffer as claimed in claim 2, wherein a first gap (80) is provided between an outer circumferential surface of one end of the piston rod (120) close to the first piston (20) and an inner circumferential surface of the first buffer chamber (130), and the first gap (80) is communicated with both the first buffer chamber (130) and the oil return flow passage (70).
4. The centering cylinder with the bidirectional buffer as claimed in claim 3, wherein a first flow guide member (100) is disposed at an end of the piston rod (120) close to the first piston (20), and the first flow guide member (100) is used for guiding the oil in the first buffer chamber (130) to the first gap (80).
5. The centering cylinder with bidirectional damping as claimed in claim 4, characterized in that the first deflector (100) is a chamfer provided at an end of the piston rod (120) near the first piston (20).
6. The centering cylinder with bidirectional damping as claimed in claim 1, characterized in that an end of the second piston (30) near the piston rod (120) is recessed to form the second damping chamber (140).
7. The centering cylinder with the bidirectional buffer as claimed in claim 6, wherein a second gap (90) is provided between an outer circumferential surface of one end of the piston rod (120) close to the second piston (30) and an inner circumferential surface of the second buffer chamber (140), and the second gap (90) is communicated with both the second buffer chamber (140) and the oil return flow passage (70).
8. The centering cylinder with the bidirectional buffer as claimed in claim 7, wherein a second flow guide member (110) is disposed at an end of the piston rod (120) close to the second piston (30), and the second flow guide member (110) is used for guiding oil in the second buffer chamber (140) to the second gap (90).
9. The centering cylinder with bidirectional damping as claimed in claim 8, characterized in that the second deflector (110) is a chamfer provided at an end of the piston rod (120) near the second piston (30).
10. A crane comprising a centering ram with bi-directional damping as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921556519.2U CN210623268U (en) | 2019-09-18 | 2019-09-18 | Centering oil cylinder with bidirectional buffering function and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921556519.2U CN210623268U (en) | 2019-09-18 | 2019-09-18 | Centering oil cylinder with bidirectional buffering function and crane |
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| Publication Number | Publication Date |
|---|---|
| CN210623268U true CN210623268U (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921556519.2U Expired - Fee Related CN210623268U (en) | 2019-09-18 | 2019-09-18 | Centering oil cylinder with bidirectional buffering function and crane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469558A (en) * | 2019-09-18 | 2019-11-19 | 三一汽车起重机械有限公司 | Centering oil cylinder and crane with bidirectional buffering |
| CN113236629A (en) * | 2021-05-20 | 2021-08-10 | 徐州重型机械有限公司 | Hydraulic cylinder and engineering machinery |
-
2019
- 2019-09-18 CN CN201921556519.2U patent/CN210623268U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469558A (en) * | 2019-09-18 | 2019-11-19 | 三一汽车起重机械有限公司 | Centering oil cylinder and crane with bidirectional buffering |
| CN113236629A (en) * | 2021-05-20 | 2021-08-10 | 徐州重型机械有限公司 | Hydraulic cylinder and engineering machinery |
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