CN216867154U

CN216867154U - Pole head connecting assembly, hydraulic cylinder and operating machine

Info

Publication number: CN216867154U
Application number: CN202220422298.5U
Authority: CN
Inventors: 王爱军; 王燕林
Original assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Current assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-07-01
Anticipated expiration: 2032-02-28
Also published as: WO2023159905A1

Abstract

The utility model relates to the technical field of hydraulic cylinders, and provides a rod head connecting assembly, a hydraulic cylinder and an operating machine. The club head connecting assembly includes: the club head comprises a club head body, a club head flange and an oil pipe. The club head body is provided with a first oil port and a second oil port respectively. The flange of the club head is provided with a central mounting hole and a plurality of edge oil through holes. The pole head body is connected with the pole head flange, and an oil cavity is arranged between the pole head body and the pole head flange. The first oil port is communicated with the oil through holes at the edges through the oil cavity. One end of the oil pipe penetrates through the central mounting hole and is communicated with the second oil port. Through this kind of structural arrangement, can increase the logical oil mass in having the pole chamber and no pole chamber. Therefore, the reaction speed of the hydraulic cylinder is greatly improved.

Description

Pole head connecting assembly, hydraulic cylinder and operating machine

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a rod head connecting assembly, a hydraulic cylinder and an operating machine.

Background

The multi-stage hydraulic cylinder can assist the operation machinery to complete operation actions such as reversing and erecting and the like as an execution device. The setting mode of the oil inlet and the oil outlet of the multi-stage hydraulic cylinder directly influences the working state of the multi-stage hydraulic cylinder. At present, the oil inlet and outlet of a rod cavity and a rodless cavity of a common multistage hydraulic cylinder are arranged on a rod head, and an oil pipe is additionally arranged in a rod body of a piston rod to separate hydraulic oil in and out of the two oil ports. Meanwhile, the rod head and the rod body of the piston rod are connected by welding or threads. In the multistage hydraulic cylinder of this kind of structure, the external diameter less than or equal to piston rod body of rod external diameter of its pole head link, when the hydraulic fluid port that passes in and out that has pole chamber and no pole chamber sets up on the pole head simultaneously, the diameter of the oily passageway of crossing between pole head and the piston rod is less, and the reaction rate of pneumatic cylinder is slower.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rod head connecting assembly, a hydraulic cylinder and an operating machine, which are used for solving the problems that the diameter of an oil passing channel between a rod head and a piston rod is small and the response speed of the hydraulic cylinder is low, and achieving the effects of increasing the size of the oil passing channel between the rod head and the piston rod and improving the response speed of the hydraulic cylinder.

According to a first aspect of the present invention, there is provided a head connection assembly comprising: the club head comprises a club head body, a club head flange and an oil pipe.

The club head body is provided with a first oil port and a second oil port respectively. The head flange is provided with a central mounting hole and a plurality of edge oil through holes. The club head body with the club head flange joint, just the club head body with be provided with the oil pocket between the club head flange. The first oil port is communicated with the edge oil through holes through the oil cavity. One end of the oil pipe penetrates through the central mounting hole and is communicated with the second oil port.

According to the club head connecting assembly provided by the utility model, the edge oil through holes are uniformly arrayed to the outer side of the central mounting hole by taking the central axis of the central mounting hole as a central line.

According to the rod head connecting assembly provided by the utility model, a first sealing device is arranged at the connecting end of the oil pipe and the second oil port.

According to a second aspect of the present invention, there is provided a hydraulic cylinder comprising a cylinder barrel assembly, a rod body assembly and a rod head connecting assembly as described above.

Wherein, body of rod subassembly includes central cavity. The cylinder barrel assembly includes a rod chamber and a rodless chamber. The club head flange is connected with the club body component. Each edge oil through hole is communicated with the central cavity. The central cavity is communicated with the rod cavity. The other end of the oil pipe is communicated with the rodless cavity.

According to the hydraulic cylinder provided by the utility model, the rod body assembly comprises a rod body, a rod tail assembly and a piston. The inner end part of the rod body is connected with the rod tail assembly. The outer end part of the rod body is connected with the rod head flange. The piston is sleeved on the outer side of the rod tail assembly. The rod body is internally provided with the central cavity. Each edge oil through hole is communicated with the central cavity. A plurality of first oil passing channels are formed in the rod tail assembly. The central cavity and the rod cavity are communicated with each other through the first oil passage.

The oil pipe is arranged in the central cavity. One end of the oil pipe penetrates through the central mounting hole to be communicated with the second oil port, and the other end of the oil pipe penetrates through the rod tail assembly to be communicated with the rodless cavity.

According to the hydraulic cylinder provided by the utility model, the cylinder barrel assembly comprises the first inner cylinder barrel, the second inner cylinder barrel and the cylinder barrel assembly. The cylinder assembly comprises an outer cylinder and a fixed rod head. The fixed rod head is closed and fixedly connected to one end of the outer cylinder barrel, and the rod head connecting assembly is located at the other end of the outer cylinder barrel.

The first inner cylinder barrel is sleeved on the outer side of the rod body component; the second inner cylinder barrel is sleeved on the outer side of the first inner cylinder barrel; the outer cylinder barrel is sleeved on the outer side of the second inner cylinder barrel.

The rod chambers include a first rod chamber, a second rod chamber, and a third rod chamber. The first rod cavity is arranged between the first inner cylinder barrel and the rod body; the second rod cavity is arranged between the second inner cylinder and the first inner cylinder; the third rod chamber is arranged between the outer cylinder and the second inner cylinder.

The first rod cavity is communicated with the central cavity through the first oil passing channel. And a second oil passing channel is formed in the first inner cylinder barrel, and the second rod cavity is communicated with the first rod cavity through the second oil passing channel. And a third oil passing channel is formed in the second inner cylinder barrel, and the third rod cavity is communicated with the rodless cavity through the third oil passing channel.

According to the hydraulic cylinder provided by the utility model, a first guide limiting sleeve is arranged between the outer cylinder barrel and the second inner cylinder barrel. The first guide limiting sleeve is fixedly connected to the open end of the outer cylinder barrel, and the second inner cylinder barrel penetrates through the first guide limiting sleeve in a sliding mode. And a first limiting boss matched with the first guiding limiting sleeve is arranged at the inner end part of the second inner cylinder barrel. The first limiting boss can be clamped at the inner end part of the first guiding limiting sleeve.

And a second guide limiting sleeve is arranged between the second inner cylinder barrel and the first inner cylinder barrel. The second guide limiting sleeve is fixedly connected to the open end of the second inner cylinder barrel, and the first inner cylinder barrel penetrates through the second guide limiting sleeve in a sliding mode. And a second limiting boss matched with the second guiding limiting sleeve is arranged at the inner end part of the first inner cylinder barrel. The second limiting boss can be clamped at the inner end part of the second guiding limiting sleeve.

And a third guide limiting sleeve is arranged between the first inner cylinder barrel and the rod body. The third guide limiting sleeve is fixedly connected to the open end of the first inner cylinder barrel, and the rod body penetrates through the third guide limiting sleeve in a sliding mode. And a third limiting boss matched with the third guiding limiting sleeve is arranged at the inner end of the rod body. The third limiting boss can be clamped at the inner end part of the third guiding limiting sleeve.

According to the hydraulic cylinder provided by the utility model, second sealing devices are arranged between the first guide limiting sleeve and the second inner cylinder barrel, between the second guide limiting sleeve and the first inner cylinder barrel, and between the third guide limiting sleeve and the rod body.

According to the hydraulic cylinder provided by the utility model, the rod head flange is connected to the outer end part of the rod body in a welding mode. The club head body is connected with the club head flange through a bolt.

According to a third aspect of the present invention, there is provided a work machine comprising a head connecting assembly or a hydraulic cylinder as described above.

In the club head connecting assembly provided by the utility model, the club head body is respectively provided with the first oil port and the second oil port. The head flange is provided with a central mounting hole and a plurality of edge oil through holes. The club head body with the club head flange joint, just the club head body with be provided with the oil pocket between the club head flange. The first oil port is communicated with the edge oil through holes through the oil cavity. One end of the oil pipe penetrates through the central mounting hole and is communicated with the second oil port.

Through this kind of structural arrangement, first hydraulic fluid port on the pole head body passes through the oil pocket and crosses the oil through-hole intercommunication with each edge. The second oil port on the club head body is communicated with the oil pipe.

When in use, the club head flange is connected with the club body. The first oil port is communicated with a rod cavity of the hydraulic cylinder through a plurality of edge oil through holes so as to increase the oil passing amount of the rod cavity. The second oil port is communicated with the rodless cavity of the hydraulic cylinder through the oil pipe, so that the sizes of the central mounting hole and the oil pipe can be increased, and the oil passing amount of the rodless cavity is increased.

From this, this pole head coupling assembling can increase the logical oil volume that has the pole chamber and no pole chamber, and then greatly promoted the reaction rate of pneumatic cylinder.

Further, in the hydraulic cylinder provided by the utility model, since the hydraulic cylinder comprises the club head connecting assembly, the hydraulic cylinder also has the advantages as described above.

Further, the present invention provides a working machine including the above-described head connecting assembly or the hydraulic cylinder, which also has the advantages described above.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a hydraulic cylinder according to the present invention;

FIG. 2 is a schematic view of a rod flange and rod assembly of the hydraulic cylinder of the present invention;

FIG. 3 is a schematic view of a club head flange of the club head connecting assembly of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is an enlarged view of a portion of FIG. 1 at B;

reference numerals:

100: a club head body; 101: a first oil port;

102: a second oil port; 200: a club head flange;

201: a central mounting hole; 202: the edge is provided with an oil through hole;

203: connecting holes of bolts; 301: an oil pipe;

302: an oil chamber; 303: a first sealing device;

400: a cylinder barrel assembly; 401: a first inner cylinder;

402: a second inner cylinder; 403: an outer cylinder;

404: fixing the club head; 405: a first rod chamber;

406: a second rod chamber; 407: a third rod chamber;

408: a rodless cavity; 409: a second oil passing channel;

410: a third oil passing channel; 500: a rod body assembly;

501: a rod body; 502: a shank tail assembly;

503 piston; 504: a central cavity;

505: a first oil passage; 601: a first guide limit sleeve;

602: a first limit boss; 603: a second guide limit sleeve;

604: a second limit boss; 605: a third guide limit sleeve;

606: and a third limiting boss.

Detailed Description

Embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention may be understood as specific cases by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification to make the purpose, technical solution, and advantages of the embodiments of the present invention more clear, and the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are a part of embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A club head connecting assembly, a hydraulic cylinder, and a working machine according to an embodiment of the present invention will be described with reference to fig. 1 to 5. It should be understood that the following description is only exemplary embodiments of the present invention and does not constitute any particular limitation of the present invention.

An example of the first aspect of the utility model provides a head connection assembly, as shown in fig. 1 to 4, comprising: head body 100, head flange 200 and oil tube 301.

The head body 100 is provided with a first oil port 101 and a second oil port 102. The head flange 200 is provided with a central mounting hole 201 and a plurality of edge oil through holes 202. The head body 100 is connected to the head flange 200. And an oil chamber 302 is arranged between the club head body 100 and the club head flange 200. The first port 101 communicates with each of the edge oil through holes 202 through the oil chamber 302. One end of the oil pipe 301 passes through the central mounting hole 201 and communicates with the second oil port 102.

With this structural arrangement, the first oil port 101 on the head body 100 communicates with each of the edge oil through-holes 202 through the oil chamber 302. The second oil port 102 of the head body 100 is communicated with the oil pipe 301. In use, the club head flange 200 is attached to the club head body 100. The first port 101 communicates with the rod chamber of the hydraulic cylinder through a plurality of edge oil passing holes 202 to increase the amount of oil passing through the rod chamber. The second oil port 102 is communicated with the rodless cavity 408 of the hydraulic cylinder through the oil pipe 301, so that the sizes of the central mounting hole 201 and the oil pipe 301 can be increased, and the oil passing amount of the rodless cavity 408 can be increased. From this, this pole head coupling assembling can increase the logical oil volume that has the pole chamber and no pole chamber 408, and then greatly promoted the reaction rate of pneumatic cylinder.

In one embodiment of the present invention, the plurality of edge oil passing holes 202 are uniformly arrayed to the outside of the center mounting hole 201 with the center axis of the center mounting hole 201 as a center line.

As shown in fig. 3, the center mounting hole 201 is located at the center axis position of the head flange 200. A plurality of edge oil through holes 202 are uniformly arrayed on the outer side of the central mounting hole 201. Therefore, when the diameter of the center mounting hole 201 is increased, the oil passing amount of the hydraulic cylinder rodless chamber 408 can be increased, and the strength of the head flange 200 can be weakened as little as possible. Meanwhile, the oil passing through holes 202 at the edges are uniformly distributed to the outer side of the central mounting hole 201, so that the oil passing amount of a rod cavity of the hydraulic cylinder can be increased, and the stress uniformity of the lifting rod head flange 200 can be improved.

It should be noted that the number of the edge oil through holes 202 is not limited in any way. For example, as shown in FIG. 3, in one embodiment of the present invention, the number of edge oil passing holes 202 is 4.

In one embodiment of the present invention, a first sealing device 303 is disposed at the connection end of the oil pipe 301 and the second oil port 102.

For example, as shown in fig. 4, one end of an oil pipe 301 passes through the central mounting hole 201 and the oil chamber 302, and extends to the inside of the rod head flange 200 to communicate with the second oil port 102. By installing the first sealing device 303 at the connection end between the oil pipe 301 and the second oil port 102, the second oil port 102 can be prevented from being communicated with the oil chamber 302, and further, the second oil port 102 communicated with the rodless chamber 408 and the first oil port 101 communicated with the rod chamber are prevented from being communicated, so that the working accuracy of the hydraulic cylinder is ensured.

Embodiments of the second aspect of the present invention provide a hydraulic cylinder, which includes a cylinder barrel assembly 400, a rod body assembly 500, and a rod head connecting assembly as described above.

Rod assembly 500 includes a central cavity 504. The cylinder assembly 400 includes rod and rodless chambers 408. Tip flange 200 is connected to shaft assembly 500. Each of the edge oil through holes 202 communicates with the central cavity 504. The central lumen 504 communicates with the rod lumen. The other end of oil pipe 301 communicates with rodless chamber 408.

In the hydraulic cylinder provided by the utility model, because the hydraulic cylinder comprises the club head connecting assembly, the hydraulic cylinder also has the advantages.

Further, in one embodiment of the present invention, rod assembly 500 includes a rod 501, a rod tail assembly 502, and a piston 503. The inner end of the rod body 501 is connected to the rod tail assembly 502. The outer end of the shaft 501 is connected to the club head flange 200. The piston 503 is sleeved outside the rod tail assembly 502. A central cavity 504 is formed inside the stem 501. Each edge oil feed-through 202 communicates with a central cavity 504. The rod tail assembly 502 is provided with a plurality of first oil passing channels 505. The central chamber 504 and the rod chamber communicate with each other through a first oil passage 505.

Oil pipe 301 is disposed within central cavity 504. One end of the oil pipe 301 passes through the head flange 200 to communicate with the second oil port 102. The other end of tubing 301 passes through rod tail assembly 502 and communicates with rodless cavity 408.

For example, as shown in fig. 1, 2 and 4, a central cavity 504 is provided in the central axis direction of the rod body 501. Oil pipe 301 passes through the interior of central cavity 504. One end of the oil pipe 301 passes through the central mounting hole 201 of the head flange 200 and communicates with the second oil port 102. Oil pipe 301 may be secured to central mounting hole 201. The other end of tubing 301 passes through rod tail assembly 502 and extends into rodless cavity 408 to communicate with rodless cavity 408. Each edge oil through hole 202 communicates with the central cavity 504. The rod tail assembly 502 is provided with a plurality of first oil passing channels 505. The central cavity 504 communicates with the rod cavities through respective first oil passing passages 505.

During operation, hydraulic oil fed through the first port 101 enters the central cavity 504 through the oil chamber 302 and the edge oil through holes 202. The hydraulic oil in the central cavity 504 enters the rod cavities through the first oil passage 505. The hydraulic oil in the rodless chamber 408 is discharged through the oil pipe 301 and the second oil port 102. At this time, the rod 501 of the hydraulic cylinder is retracted. The hydraulic oil inputted through the second oil port 102 enters the rodless chamber 408 through the oil pipe 301. The hydraulic oil in the rod chamber passes through each first oil passage 505 and enters the central chamber 504. The hydraulic oil in the central cavity 504 is discharged through the respective edge oil through holes 202 and the first oil port 101. At this time, the rod 501 of the hydraulic cylinder is extended.

In one embodiment of the present invention, as shown in fig. 1, 4 and 5, the cylinder assembly 400 includes a first inner cylinder 401, a second inner cylinder 402 and a cylinder assembly. The cylinder assembly includes an outer cylinder 403 and a fixed rod head 404. The fixing rod head 404 is closed and fixedly connected to one end of the outer cylinder 403. The club head attachment assembly is located at the other end of the outer cylinder 403.

The first inner cylinder 401 is sleeved outside the rod assembly 500. The second inner cylinder 402 is sleeved outside the first inner cylinder 401. The outer cylinder 403 is disposed outside the second inner cylinder 402.

The rod chambers include a first rod chamber 405, a second rod chamber 406, and a third rod chamber 407. The first rod chamber 405 is disposed between the first inner cylinder 401 and the rod body 501. A second rod chamber 406 is disposed between the second inner cylinder 402 and the first inner cylinder 401. A third rod chamber 407 is disposed between the outer cylinder 403 and the second inner cylinder 402.

The first rod chamber 405 communicates with the central chamber 504 through a first oil passage 505. The first inner cylinder barrel 401 is provided with a second oil passage 409, and the second rod cavity 406 is communicated with the first rod cavity 405 through the second oil passage 409. The second inner cylinder 402 is provided with a third oil passage 410, and the third rod chamber 407 is communicated with the rodless chamber 408 through the third oil passage 410.

Further, in an embodiment of the present invention, as shown in fig. 1, 4 and 5, a first guiding and limiting sleeve 601 is disposed between the outer cylinder 403 and the second inner cylinder 402. The first guiding and limiting sleeve 601 is fixedly connected to the open end of the outer cylinder 403. The second inner cylinder 402 is slidably disposed through the first guiding and limiting sleeve 601. The inner end of the second inner cylinder 402 is provided with a first limit boss 602 adapted to the first guide limit sleeve 601. The first limit boss 602 can be clamped at the inner end of the first guide limit sleeve 601.

A second guiding and limiting sleeve 603 is arranged between the second inner cylinder 402 and the first inner cylinder 401. The second guide and stop collar 603 is fixedly attached to the open end of the second inner cylinder 402. The first inner cylinder 401 is slidably disposed through the second guiding and limiting sleeve 603. The inner end of the first inner cylinder 401 is provided with a second limit boss 604 adapted to the second guide limit sleeve 603. The second limit boss 604 can be clamped at the inner end of the second guide limit sleeve 603.

A third guiding and limiting sleeve 605 is arranged between the first inner cylinder 401 and the rod body 501. The third guide bushing 605 is fixedly connected to the open end of the first inner cylinder 401. The rod body 501 is slidably inserted into the third guiding and limiting sleeve 605. The inner end of the rod body 501 is provided with a third limiting boss 606 matched with the third guiding limiting sleeve 605. The third limiting boss 606 can be clamped at the inner end of the third guiding limiting sleeve 605.

During operation, when the hydraulic cylinder performs an extending action, hydraulic oil enters the rodless cavity 408 of the hydraulic cylinder through the second oil port 102 and the oil pipe 301. Under the driving action of the hydraulic oil in the rodless chamber 408, the rod assembly 500, the first inner cylinder 401 and the second inner cylinder 402 move outward at the same time. When the first limit boss 602 on the second inner cylinder 402 is clamped at the inner end of the first guide limit sleeve 601, the second inner cylinder 402 stops moving outwards. Hydraulic oil is continuously introduced into the rodless cavity 408, the rod assembly 500 and the first inner cylinder barrel 401 move outwards simultaneously under the action of the hydraulic oil in the rodless cavity 408, and when the second limiting boss 604 on the first inner cylinder barrel 401 is clamped at the inner end of the second guiding limiting sleeve 603, the first inner cylinder barrel 401 stops moving outwards. Oil is continuously introduced into the rodless cavity 408, the rod assembly 500 moves outwards under the action of the hydraulic oil in the rodless cavity 408, and when the third limiting boss 606 on the rod body 501 is clamped at the inner end of the third guiding limiting sleeve 605, the rod assembly 500 stops moving outwards. During the outward extension of the rod assembly 500, the first inner cylinder 401 and the second inner cylinder 402, the hydraulic oil in the third rod chamber 407 enters the rodless chamber 408 through the third oil passage 410. The hydraulic oil in the second rod chamber 406 enters the first rod chamber 405 through the second oil passage 409, and the hydraulic oil in the first rod chamber 405 enters the central chamber 504 through the first oil passages 505. The hydraulic oil in the central cavity 504 is discharged through the respective edge oil through holes 202 and the first oil port 101.

When the hydraulic cylinder contracts, hydraulic oil enters the central cavity 504 through the first oil port 101 and the edge oil through holes 202, hydraulic oil in the central cavity 504 enters the first rod cavity 405 through the first oil through channel 505, and a part of hydraulic oil in the rodless cavity 408 is discharged through the oil pipe 301 and the second oil port 102. Rod assembly 500 is gradually retracted inwardly to the limit position. The hydraulic oil is continuously introduced into the central cavity 504, the hydraulic oil in the first rod cavity 405 enters the second rod cavity 406 through the second oil passage 409, and part of the hydraulic oil in the rodless cavity 408 is discharged through the oil pipe 301 and the second oil port 102. The first inner cylinder 401 is gradually retracted inward to the extreme position. Subsequently, the external force pushes the second inner cylinder 402 to contract inward. At this time, a part of the oil in the rodless chamber 408 passes through the third oil passing passage 410 and enters the third rod chamber 407. The remaining oil in rodless chamber 408 is discharged through oil tube 301 and second port 102.

It should be understood herein that the descriptions of the inner side and the inner end, etc. described in the above embodiments refer to directions away from the head flange 200; the outer side and outer end, etc. are described with reference to the direction toward the club head flange 200.

As can be seen from the above-described embodiments, in the whole operation of the hydraulic cylinder, the third rod chamber 407 is communicated with the rodless chamber 408, so that the second inner cylinder 402 can work only in a single action, that is, the second inner cylinder 402 can only extend out by itself and cannot retract by itself. When it is desired to retract the second inner cylinder 402, it may be desirable to push retraction under the force of gravity or other external force. Therefore, the contraction buffering performance of the hydraulic cylinder can be improved. First inner cylinder 401 and rod assembly 500 can perform a double-acting operation, that is, first inner cylinder 401 and rod assembly 500 can be extended or retracted by itself.

In an embodiment of the present invention, second sealing devices are further disposed between the first guiding and limiting sleeve 601 and the second inner cylinder 402, between the second guiding and limiting sleeve 603 and the first inner cylinder 401, and between the third guiding and limiting sleeve 605 and the rod body 501.

It should be noted here that the present invention is not limited in any way to the connection mode between the first guide and stopper sleeve 601 and the outer cylinder 403, the connection mode between the second guide and stopper sleeve 603 and the second inner cylinder 402, and the connection mode between the third guide and stopper sleeve 605 and the first inner cylinder 401. For example, the first guide stop collar 601, the second guide stop collar 603, and the third guide stop collar 605 may be interference fit connected to the outer cylinder 403, the second inner cylinder 402, and the first inner cylinder 401, respectively. Sealing rings may be installed between the first guide and stopper sleeve 601 and the outer cylinder 403, between the second guide and stopper sleeve 603 and the second inner cylinder 402, and between the third guide and stopper sleeve 605 and the first inner cylinder 401.

In one embodiment of the utility model, the club head flange 200 is welded to the outer end of the club body 501. The head body 100 and the head flange 200 are connected by bolts.

For example, as shown in fig. 3, a plurality of bolt connection holes 203 are uniformly and alternately arranged on the edge of the club head flange 200. The head flange 200 is connected to the head body 100 by a plurality of bolts.

It should be understood that the above-mentioned embodiment is only an illustrative embodiment of the present invention, and does not constitute any limitation to the present invention.

Embodiments of a third aspect of the present disclosure provide a work machine including a club head attachment assembly or a hydraulic cylinder as described above.

For example, in one embodiment of the present invention, the work machine includes a crane or an elevated fire engine.

It should be noted that the above-mentioned embodiment is only an illustrative embodiment of the present invention, and does not constitute any limitation to the present invention. That is, the work machine includes, but is not limited to, a crane or an elevated fire engine.

Further, since the work machine includes the head connecting assembly or the hydraulic cylinder as described above, it also has the advantages as described above.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A club head attachment assembly, comprising: a club head body, a club head flange and an oil pipe,

the golf club head comprises a club head body, a club head flange and a first oil port, wherein the club head body is provided with the first oil port and the second oil port respectively, the club head flange is provided with a central mounting hole and a plurality of edge oil through holes, the club head body is connected with the club head flange, an oil cavity is arranged between the club head body and the club head flange, the first oil port is communicated with the edge oil through holes through the oil cavity, and one end of the oil pipe penetrates through the central mounting hole and is communicated with the second oil port.

2. The tip connection assembly according to claim 1, wherein the plurality of edge oil passing holes are uniformly arrayed to the outside of the central mounting hole with the central axis of the central mounting hole as a center line.

3. The tip connection assembly according to claim 1, wherein a first sealing means is provided at a connection end of the oil tube and the second oil port.

4. A hydraulic cylinder comprising a cylinder barrel assembly, a rod body assembly and a rod head connecting assembly according to any one of claims 1 to 3,

the rod body assembly comprises a central cavity, the cylinder barrel assembly comprises a rod cavity and a rodless cavity, the rod head flange is connected with the rod body assembly, the edge oil through holes are communicated with the central cavity, the central cavity is communicated with the rod cavity, and the other end of the oil pipe is communicated with the rodless cavity.

5. The hydraulic cylinder according to claim 4, wherein the rod body assembly comprises a rod body, a rod tail assembly and a piston, the inner end of the rod body is connected with the rod tail assembly, the outer end of the rod body is connected with the rod head flange, the piston is sleeved outside the rod tail assembly, the central cavity is formed inside the rod body, each edge oil through hole is communicated with the central cavity, the rod tail assembly is provided with a plurality of first oil through channels, and the central cavity is communicated with the rod cavity through the first oil through channels,

the oil pipe is arranged in the central cavity, one end of the oil pipe penetrates through the central mounting hole to be communicated with the second oil port, and the other end of the oil pipe penetrates through the rod tail assembly to be communicated with the rodless cavity.

6. The hydraulic cylinder according to claim 5, wherein the cylinder barrel assembly comprises a first inner cylinder barrel, a second inner cylinder barrel and a cylinder barrel assembly, the cylinder barrel assembly comprises an outer cylinder barrel and a fixed rod head, the fixed rod head is closed and fixedly connected to one end of the outer cylinder barrel, the rod head connecting assembly is located at the other end of the outer cylinder barrel,

the first inner cylinder barrel is sleeved on the outer side of the rod body component, the second inner cylinder barrel is sleeved on the outer side of the first inner cylinder barrel, the outer cylinder barrel is sleeved on the outer side of the second inner cylinder barrel,

the rod cavity comprises a first rod cavity, a second rod cavity and a third rod cavity, the first rod cavity is arranged between the first inner cylinder and the rod body, the second rod cavity is arranged between the second inner cylinder and the first inner cylinder, the third rod cavity is arranged between the outer cylinder and the second inner cylinder,

the first rod cavity is communicated with the central cavity through the first oil passing channel, the first inner cylinder barrel is provided with a second oil passing channel, the second rod cavity is communicated with the first rod cavity through the second oil passing channel, the second inner cylinder barrel is provided with a third oil passing channel, and the third rod cavity is communicated with the rodless cavity through the third oil passing channel.

7. The hydraulic cylinder according to claim 6, wherein a first guide limit sleeve is arranged between the outer cylinder barrel and the second inner cylinder barrel, the first guide limit sleeve is fixedly connected to the open end of the outer cylinder barrel, the second inner cylinder barrel is slidably arranged in the first guide limit sleeve in a penetrating manner, a first limit boss matched with the first guide limit sleeve is arranged at the inner end of the second inner cylinder barrel, and the first limit boss can be clamped at the inner end of the first guide limit sleeve;

a second guide limiting sleeve is arranged between the second inner cylinder barrel and the first inner cylinder barrel, the second guide limiting sleeve is fixedly connected to the opening end of the second inner cylinder barrel, the first inner cylinder barrel is slidably arranged in the second guide limiting sleeve in a penetrating mode, a second limiting boss matched with the second guide limiting sleeve is arranged at the inner end of the first inner cylinder barrel, and the second limiting boss can be clamped at the inner end of the second guide limiting sleeve;

the first inner cylinder barrel and the rod body are provided with a third guide limiting sleeve therebetween, the third guide limiting sleeve is fixedly connected to the open end of the first inner cylinder barrel, the rod body penetrates through the third guide limiting sleeve in a sliding mode, a third limiting boss matched with the third guide limiting sleeve is arranged at the inner end of the rod body, and the third limiting boss can be clamped at the inner end of the third guide limiting sleeve.

8. The hydraulic cylinder according to claim 7, wherein second sealing devices are further arranged between the first guide limiting sleeve and the second inner cylinder, between the second guide limiting sleeve and the first inner cylinder, and between the third guide limiting sleeve and the rod body.

9. The hydraulic cylinder of claim 5, wherein the club head flange is welded to an outer end of the shaft, and the club head body is bolted to the club head flange.

10. A work machine comprising a putter head connection assembly according to any one of claims 1 to 3 or a hydraulic cylinder according to any one of claims 4 to 9.