CN114576234A

CN114576234A - Hydraulic cylinder convenient for replacing joint

Info

Publication number: CN114576234A
Application number: CN202210483261.8A
Authority: CN
Inventors: 樊尧; 孙兰涛; 龚铁东; 宋中虎
Original assignee: Changzhou Wujin Tianyu Hydraulic Parts Co ltd
Current assignee: Changzhou Wujin Tianyu Hydraulic Parts Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-06-03
Anticipated expiration: 2042-05-06
Also published as: CN114576234B

Abstract

The invention discloses a hydraulic cylinder convenient for replacing a joint, which comprises a cylinder body, wherein a tailstock is arranged at the tail part of the cylinder body, a telescopic rod is arranged in the cylinder body, a hydraulic piston is arranged at one end, positioned in the cylinder body, of the telescopic rod, a second liquid supply pipe and a first liquid supply pipe are respectively arranged at the front end and the rear end of the cylinder body, the first liquid supply pipe and the second liquid supply pipe are respectively connected with a hydraulic pump, one end, far away from the cylinder body, of the telescopic rod is movably connected with an output part, and the output part is used for outputting power of the hydraulic cylinder. When the hydraulic cylinder needs to replace the output part, the hydraulic pump can be closed, the control valve is opened, so that the pins lose the supporting force of the hydraulic medium, and the pins are separated from the output part. After changing the joint of other specifications, can open the hydraulic pump, hydraulic medium can release each pin again, closes the control valve afterwards for hydraulic medium can not flow back, with this change that can accomplish different output, operates simplyr, and this process also need not other instruments simultaneously, and is more intelligent.

Description

Hydraulic cylinder convenient for replacing joint

Technical Field

The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a joint convenient to replace.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The pneumatic cylinder comprises parts such as cylinder body, telescopic link, base, joint usually, and wherein the base is installed at the cylinder body afterbody usually, and the joint is then installed at the telescopic link head to the joint can be changed according to pneumatic cylinder practical application environment, in order to adapt to different user demands. The existing hydraulic cylinder is mostly connected with the joint through threads and screws, and when the joints of different types are replaced, corresponding tools are needed, so that the problems of complex operation, low replacement efficiency and the like are caused.

Disclosure of Invention

The invention aims to provide a hydraulic cylinder with a joint convenient to replace, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a pneumatic cylinder convenient to change connects, includes the cylinder body, the tailstock is installed to the afterbody of cylinder body, the inside of cylinder body is provided with the telescopic link, hydraulic piston is installed to the one end that the telescopic link is located the cylinder body inside, two and the feed pipe one are installed respectively at both ends around the cylinder body, two hydraulic pumps that are connected with of feed pipe one and feed pipe, the one end swing joint that the cylinder body was kept away from to the telescopic link has the output, the output is used for exporting the power of pneumatic cylinder, the inside of telescopic link head is provided with a plurality of pins, the control chamber has been seted up with the position that a plurality of pins correspond to the telescopic link, the pin can be in the inside activity of control chamber, and the pin can cooperate with the output inner wall after stretching out the telescopic link surface. When the hydraulic cylinder needs to replace the output part, the hydraulic pump can be closed by the hydraulic cylinder, and the control valve can be opened, so that the pins lose the supporting force of the hydraulic medium, the pins are separated from the output part, and then the joint can be taken down.

According to the technical scheme, the connecting ring is installed on one side, facing the telescopic rod, of the output part, and the connecting hole is formed in the middle of the connecting ring and matched with the telescopic rod.

According to the technical scheme, an included angle is formed between the axis of the pin and the axis of the telescopic rod and is smaller than 60 degrees.

According to the technical scheme, the two adjacent pins in the axis direction of the telescopic rod are arranged oppositely, pin holes are formed in the inner wall of the connecting hole and in the positions corresponding to the pins, and the pins are matched with the pin holes respectively. The telescopic rod is used as an output component of the hydraulic cylinder, the telescopic rod can bear most of acting force, the acting force is consistent with the axial direction of the telescopic rod, and the output part fixedly connected with the telescopic rod can synchronously bear the acting force. The two pins connected together can bear the shearing force vertical to the axis of the telescopic rod, and because an included angle is formed between each pin and the axis of the telescopic rod, when the acting force is transmitted to each pin, the oblique pins can disperse the shearing force in the vertical direction borne by the oblique pins to the oblique direction of the oblique pins, so that the shearing force borne by the pins can be reduced.

According to the technical scheme, the control flow channel is formed in the middle of the telescopic rod and is respectively communicated with the control cavities, the pin is located at one end inside the control cavity, the push-out piston is installed at one end of the pin, the spring is arranged at one end, facing the pin, of the push-out piston, and the surface of the pin is sleeved with the spring.

According to the technical scheme, the control flow passage penetrates through the telescopic rod, the control pipe is connected to the position, located at the outlet of the telescopic rod, of the control flow passage, the control pipe is located inside the first liquid supply pipe and penetrates through one side, protruding out of the cylinder body, of the first liquid supply pipe, the control pipe is connected with the hydraulic pump pipeline, the control valve is further installed in the middle of the control pipe and connected with the hydraulic pump, and the control valve is used for opening or closing the control pipe.

According to the technical scheme, the sealing slide block is arranged in the control flow passage and used for dividing the control flow passage into two chambers, and the inside of each chamber is filled with the hydraulic medium. After changing the joint of other specifications, can open the hydraulic pump, hydraulic medium can release each pin again to with new output portion adaptation, later on close the control valve again, make hydraulic medium can not flow back, with this change that can accomplish different output portions, the operation is simpler, also need not other instruments simultaneously, more intelligent.

According to the technical scheme, the connecting ring is installed on one side, facing the telescopic rod, of the output portion, the connecting hole is formed in the middle of the connecting ring, internal threads are arranged on the inner surface of the connecting hole, external threads are correspondingly arranged on the outer surface of the telescopic rod, and the internal threads are meshed with the external threads.

Compared with the prior art, the invention has the following beneficial effects:

(1) through being provided with pin and pinhole, through the cooperation of a plurality of pins and pinhole, with output part and telescopic link fixed connection, compare like this in other connected mode operations more simple and convenient, the pin sets up respectively on telescopic link and output part with the pinhole simultaneously to carry out drive control through hydraulic medium, need not to carry other instruments again, it is more convenient.

(2) Through forming the contained angle between pin and the telescopic link, the telescopic link is as the output member of pneumatic cylinder, and it will bear most effort to this effort is unanimous with the axis direction of telescopic link, and the output portion with telescopic link fixed connection will also bear this effort in step. The two pins connected together can bear the shearing force vertical to the axis of the telescopic rod, and because an included angle is formed between each pin and the axis of the telescopic rod, when the acting force is transmitted to each pin, the oblique pins can disperse the shearing force in the vertical direction borne by the oblique pins to the oblique direction of the oblique pins, so that the shearing force borne by the pins can be reduced.

Drawings

The accompanying drawings, which 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 principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic overall elevational view of the present invention;

FIG. 2 is a partial sectional structural view of the area A of the present invention;

FIG. 3 is a partial cross-sectional structural schematic view of the cylinder block of the present invention;

FIG. 4 is a cross-sectional structural schematic view of the head of the telescopic pole of the present invention;

FIG. 5 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 6 is a schematic view of the pin movement of the present invention;

in the figure: 1. a cylinder body; 2. a tailstock; 3. an output section; 4. a telescopic rod; 5. a first liquid supply pipe; 6. a liquid supply pipe II; 7. a connecting ring; 8. connecting holes; 9. controlling the flow passage; 10. a control chamber; 11. pushing out the piston; 12. a pin; 13. a pin hole; 14. a spring; 15. a hydraulic piston; 16. a control tube; 17. a control valve; 18. and sealing the sliding block.

Detailed Description

The technical solutions 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 only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 1, the present invention provides a technical solution: embodiment one in a hydraulic cylinder for facilitating joint replacement: including cylinder body 1, tailstock 2 is installed to the afterbody of cylinder body 1, and tailstock 2 is used for fixing the pneumatic cylinder in the position of use. The inside of cylinder body 1 is cavity, and the inside of cylinder body 1 is provided with telescopic link 4, hydraulic piston 15 is installed to telescopic link 4 one end that is located the inside of cylinder body 1, two 6 and the feed pipe 5 of feed pipe are installed respectively to both ends around the cylinder body 1, two 6 hydraulic pumps that are connected with respectively in feed pipe 5 and the feed pipe, hydraulic pump is through going into hydraulic oil to one of them feed pipe pump, the hydraulic oil of pump income will promote hydraulic piston 15 and remove afterwards, thereby the drive telescopic link stretches out or the withdrawal. One end swing joint that the cylinder body 1 was kept away from to telescopic link 4 has output portion 3, and output portion 3 can be different joints, and it is mainly according to the pneumatic cylinder actual service environment, selects the joint of different specifications, and output portion 3 is used for exporting the power of pneumatic cylinder.

Referring to fig. 2, a connecting ring 7 is installed on one side of the output portion 3 facing the telescopic rod 4, a connecting hole 8 is opened in the middle of the connecting ring 7, and the connecting hole 8 is sleeved with the telescopic rod 4.

Referring to fig. 2-4, a plurality of pins 12 are disposed inside the head of the telescopic rod 4, and a control chamber 10 is disposed at a position of the telescopic rod 4 corresponding to the plurality of pins 12. Control flow channel 9 has been seted up at the middle part of telescopic link 4, and control flow channel 9 communicates with a plurality of control chamber 10 respectively, and a plurality of pins 12 are located the inside one end in control chamber 10 and all install and release piston 11.

Referring to fig. 4, a spring 14 is disposed at an end of the pushing piston 11 facing the pin 12, the spring 14 is sleeved on a surface of the pin 12, and the pushing piston 11 can push the pin 12 to move in the control chamber 10 and protrude or retract the pin to an outer surface of the telescopic rod 4. And the spring 14 is a supporting spring, one end of the spring 14 is fixedly connected with the end surface of the push-out piston 11, and the other end is fixedly connected with the inner wall of the control chamber 10.

Referring to fig. 2 and 4, an included angle is formed between the axis of the pin 12 and the axis of the telescopic rod 4, and the included angle is smaller than 60 °. Two adjacent pins 12 in the axial direction of the telescopic rod 4 are arranged oppositely, namely the direction between the two adjacent pins 12 is opposite, the inner wall of the connecting hole 8 and the position corresponding to the pins 12 are provided with pin holes 13, and the pins 12 are respectively matched with the pin holes 13.

Referring to fig. 3 and 6, a control flow passage 9 is formed through the middle portion of the telescopic rod 4, the control flow passage 9 is connected to a control tube 16, and the control tube 16 is located inside the first liquid supply tube 5. And the control pipe 16 penetrates through the first liquid supply pipe 5 and protrudes out of one side of the cylinder body 1, the control pipe 16 is connected with a hydraulic pump pipeline, the middle part of the control pipe 16 is also provided with a control valve 17, the control pipe 16 is connected with a hydraulic pump, and the control valve 17 is used for opening or closing the control pipe 16. The control flow channel 9 is provided with a sealing slide block 18 inside, and the sealing slide block 18 is used for dividing the control flow channel 9 into two chambers, and the inside of each chamber is filled with a hydraulic medium.

Referring to fig. 4, when hydraulic oil flows into the control flow passage 9, the hydraulic oil enters the control chamber 10, and the hydraulic oil applies a pushing force to the push-out piston 11, and when the pushing force is greater than the elastic force of the spring 14, the hydraulic oil pushes the push-out piston 11 to move toward the outside of the telescopic rod 4 (i.e., the push-out piston 11 pushes the pin 12 out of the telescopic rod 4). After the pushing force of the hydraulic oil on the pushing piston 11 is smaller than the elastic force of the spring 14, the spring 14 will push the pushing piston 11 to move towards the inside of the telescopic rod 4 (i.e. the pin 12 retracts into the inside of the telescopic rod 4) under the action of its own elastic force, and the moving stroke of the pushing piston 11 is the length of the control chamber 10.

The working principle is as follows: when the output 3 needs to be replaced, the hydraulic pump connected to the control line 16 may be closed and the control valve 17 connected to the control line 16 may be opened, while the control line 16 will remain open. The respective pin 12 and consequently the ejection piston 11 will then move towards the axis of the telescopic rod 4, i.e. slide inside the control chamber 10, under the action of the spring 14 itself, and eventually the respective pin 12 will be totally retracted inside the telescopic rod 4.

After the pin 12 has retracted the telescopic rod 4, it will be disengaged from the pin hole 13 in the connection ring 7 of the previous output 3, thereby disengaging the connection ring 7 from the telescopic rod 4, at which point the output 3 can be removed.

A new output 3 to be replaced can then be slipped onto the surface of the telescopic rod 4 and the respective pin holes 13 in the connecting ring 7 of the output 3 aligned with the respective pins 12. The hydraulic pump connected to the control line 16 can now be started, which pumps hydraulic medium into the control line 16, which then flows through the control line 16 and finally into the control channel 9. After the hydraulic medium enters the control flow channel 9, it will push the sealing slide 18 to slide towards the pin 12, so that the volume of the side chamber will be reduced, and the hydraulic medium in the side chamber will be squeezed out and flow to the respective control chamber 10.

After the hydraulic medium is squeezed into the control chamber 10, the push-out piston 11 in the control chamber 10 will push each pin 12 to protrude out of the telescopic rod 4 and finally enter the pin hole 13 aligned therewith, so that the matching of the pin 12 and the pin hole 13 can be completed, and the telescopic rod 4 is fixedly connected with the new output part 3. The control valve 17 can then be closed first, so that a temporary shut-off between the control line 16 and the hydraulic pump is achieved, so that the hydraulic medium in the chambers between the control valve 17 and the sealing slide 18 and between the sealing slide 18 and the respective control chamber 10 cannot flow, so that the hydraulic medium can maintain the supporting force for the respective ejection piston 11 and the pin 12.

Meanwhile, the telescopic rod 4 is used as an output part of the hydraulic cylinder and can bear most of acting force, the acting force is consistent with the axial direction of the telescopic rod 4, and the output part 3 fixedly connected with the telescopic rod 4 can synchronously bear the acting force. The pins 12 connecting the two components together are subjected to shear forces in a direction perpendicular to the axis of the telescopic rod 4. Because the pins 12 form an included angle with the axis of the telescopic rod 4, when the acting force is transmitted to the pins 12, the oblique pins 12 disperse the vertical shearing force applied thereto to the oblique direction, so as to reduce the shearing force applied to the pins 12.

Referring to fig. 5, the second embodiment: the output part 3 is provided with a connecting ring 7 towards one side of the telescopic rod 4, the middle part of the connecting ring 7 is provided with a connecting hole 8, and the connecting hole 8 is in threaded connection with the telescopic rod 4. Similarly, the degree of contact between the connection ring 7 and the telescopic rod 4 can be increased by screwing, so that the strength of engagement between the output part 3 and the telescopic rod 4 can be further increased after the pin 12 is engaged with the pin hole 13.

Example three: when the pressure born by the output part 3 is not large during working, the arrangement of the pin hole 13 can be cancelled, after the pin hole 13 is cancelled, the inner shape of the output part connecting hole 8 is matched with the outer shape of the head part of the telescopic rod 4, and the outer side end surface of each pin 12 is consistent with the inner wall shape of the connecting hole 8. After the pin 12 is pushed out of the telescopic rod 4, the outer end face of the pin will contact with the inner wall of the connecting hole 8, and as the thrust of the hydraulic oil to the pushing piston 11 is gradually increased, the contact between the end face of the pin 12 and the inner wall of the connecting hole 8 is tighter, so that the telescopic rod 4 is connected with the output part 3. Meanwhile, the arrangement of the pin hole 13 is eliminated, and the production processes of different output parts 3 can be reduced, so that the production cost is indirectly reduced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a pneumatic cylinder convenient to change connects, includes cylinder body (1), tailstock (2) are installed to the afterbody of cylinder body (1), the inside of cylinder body (1) is provided with telescopic link (4), telescopic link (4) are located the inside one end of cylinder body (1) and install hydraulic piston (15), supply pipe two (6) and supply pipe one (5) are installed respectively at both ends around cylinder body (1), supply pipe one (5) and supply pipe two (6) are connected with hydraulic pump, its characterized in that respectively: one end swing joint that cylinder body (1) was kept away from in telescopic link (4) has output portion (3), output portion (3) are used for exporting the power of pneumatic cylinder, the inside of telescopic link (4) head is provided with a plurality of pins (12), control chamber (10) have been seted up with the position that a plurality of pins (12) correspond in telescopic link (4), pin (12) can be in control chamber (10) inside activity.

2. The hydraulic cylinder of claim 1, wherein the joint is replaceable by: the output part (3) is provided with a connecting ring (7) towards one side of the telescopic rod (4), the middle part of the connecting ring (7) is provided with a connecting hole (8), and the connecting hole (8) is matched with the telescopic rod (4).

3. The hydraulic cylinder of claim 1, wherein the joint is replaceable by: an included angle is formed between the axis of the pin (12) and the axis of the telescopic rod (4), and the included angle is smaller than 60 degrees.

4. The hydraulic cylinder of claim 2, wherein the joint is replaceable by: two adjacent pins (12) of telescopic link (4) axis direction set up for relative, pinhole (13), a plurality of pinhole (13) have been seted up with the position that pin (12) correspond to the inner wall of connecting hole (8) pin (12) adaptation respectively.

5. A hydraulic cylinder for facilitating joint replacement according to claim 3, wherein: control flow channel (9) have been seted up at the middle part of telescopic link (4), control flow channel (9) communicate with a plurality of control chamber (10) respectively, and is a plurality of release piston (11) are all installed to the one end that pin (12) are located control chamber (10) inside, release piston (11) are provided with spring (14) towards the one end of pin (12), the surface of pin (12) is located to spring (14) cover.

6. The hydraulic cylinder of claim 5, wherein the joint is replaceable by: control runner (9) run through telescopic link (4), the exit that control runner (9) are located telescopic link (4) is connected with control tube (16), control tube (16) are located the inside of feed pipe (5), just control tube (16) run through one side that feed pipe (5) salient cylinder body (1), control valve (17) are still installed to the middle part of control tube (16), control tube (16) and hydraulic pump connection, control valve (17) are used for opening or close control tube (16).

7. The hydraulic cylinder of claim 5, wherein the joint is replaceable by: the hydraulic control system is characterized in that a sealing sliding block (18) is arranged in the control flow passage (9), the sealing sliding block (18) is used for dividing the control flow passage (9) into two chambers, and hydraulic media are filled in the chambers.

8. The hydraulic cylinder facilitating joint replacement according to claim 1, wherein: the connecting ring (7) is installed on one side, facing the telescopic rod (4), of the output portion (3), a connecting hole (8) is formed in the middle of the connecting ring (7), and the connecting hole (8) is in threaded connection with the telescopic rod (4).