CN210509795U - Locking hydraulic cylinder - Google Patents
Locking hydraulic cylinder Download PDFInfo
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- CN210509795U CN210509795U CN201921321917.6U CN201921321917U CN210509795U CN 210509795 U CN210509795 U CN 210509795U CN 201921321917 U CN201921321917 U CN 201921321917U CN 210509795 U CN210509795 U CN 210509795U
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- guide sleeve
- piston rod
- locking
- cylinder body
- piston
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Abstract
The utility model relates to a locking pneumatic cylinder. The piston is arranged in the cylinder body and can slide in the cylinder body, the cylinder body is divided into a rod cavity and a rodless cavity by the piston, and the inner end of the piston rod is fixedly connected with the piston; the guide sleeve is sleeved on the piston rod, the piston rod can slide in the guide sleeve, the outer wall of the guide sleeve is fixedly connected with the inner wall of the cylinder body, and an outer end stopping part of the guide sleeve is abutted against the outer end face of the cylinder body; the outer end of the piston rod is provided with a trapezoidal external thread, the inner end face of the locking member is abutted to the outer end face of the guide sleeve, a trapezoidal internal thread is formed in the inner wall of the locking member, and the trapezoidal external thread is matched and locked with the trapezoidal internal thread. The utility model discloses utilize the trapezoidal thread meshing of retaining member and piston rod tip, and retaining member the inner offsets with the uide bushing outer end, come the control piston rod whereabouts, make piston rod locking position reliable stable, can lock for a long time and set up certain position, locking precision height, energy saving, simple structure, with low costs are fit for batch production.
Description
Technical Field
The utility model relates to a locking pneumatic cylinder. Belongs to the technical field of hydraulic pressure.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems.
The hydraulic cylinders for some hydraulic equipment have the requirement of pressure maintaining and locking, a hydraulic control one-way valve is usually added in a hydraulic system, the valve is sealed by a cone, zero leakage is difficult to achieve in the sealing mode, and the leakage condition also exists in a piston sealing ring of the hydraulic cylinder.
The utility model discloses a china utility model discloses a pneumatic cylinder locking mechanism (application number: 201720832554.7), it includes barrel and piston rod, the both ends of barrel all are fixed with the end cover, the piston rod wears to locate in the barrel, wherein, in the barrel in disc spring is installed outward to the piston rod, disc spring one side is provided with the tightening sleeve that is located the barrel, tightening sleeve has conical hole, the cooperation tightening sleeve in the piston rod installs outward and is located the taper sleeve in the hole, tightening sleeve with form the locking control chamber between the barrel, the locking control hydraulic fluid port has been seted up on the barrel, and this patent utilizes the tightening sleeve that has the taper hole and forms the locking control chamber between the barrel, relies on the taper seal, exists the problem of the leakage that points out above.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned not enough, provide a locking pneumatic cylinder.
The purpose of the utility model is realized like this:
a locking hydraulic cylinder is characterized in that: the hydraulic cylinder comprises a piston rod, a locking piece, a guide sleeve, a piston and a cylinder body, wherein an oil inlet is formed in the position, located in a rod cavity, of the cylinder body, and an oil outlet is formed in the position, located in a rodless cavity, of the cylinder body;
the piston is arranged in the cylinder body and can slide in the cylinder body, the cylinder body is divided into a rod cavity and a rodless cavity by the piston, and the inner end of the piston rod is fixedly connected with the piston;
the guide sleeve is sleeved on the piston rod, the piston rod can slide in the guide sleeve, the outer wall of the guide sleeve is fixedly connected with the inner wall of the cylinder body, and an outer end stopping part of the guide sleeve is abutted against the outer end face of the cylinder body;
the outer end of the piston rod is provided with a trapezoidal external thread, the inner end face of the locking member is abutted to the outer end face of the guide sleeve, a trapezoidal internal thread is formed in the inner wall of the locking member, and the trapezoidal external thread is matched and locked with the trapezoidal internal thread.
Furthermore, a second support ring and a hole sealing ring are arranged between the piston and the cylinder body.
Further, a second fixing ring is arranged between the piston rod and the piston.
Furthermore, a dustproof ring, a shaft sealing ring and a first supporting ring are arranged between the guide sleeve and the piston rod, the dustproof ring is located on the inner wall of the guide sleeve and close to the outer end of the guide sleeve, the first supporting ring is located on the inner wall of the guide sleeve and close to the inner end of the guide sleeve, and the shaft sealing ring is located in the middle of the inner wall of the guide sleeve.
Further, be provided with first retainer plate between uide bushing and the cylinder body.
Furthermore, four wrench holes are uniformly formed on the outer surface of the locking piece along the circumference.
Furthermore, the inner wall of the locking piece is provided with an annular groove.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model relates to a locking pneumatic cylinder utilizes the trapezoidal thread meshing of retaining member and piston rod tip, and the retaining member inner offsets with the uide bushing outer end, controls the piston rod whereabouts, makes piston rod locking position reliable stable, can lock for a long time and set up certain position, and locking precision height, energy saving, simple structure, with low costs are fit for batch production.
The utility model relates to a locking pneumatic cylinder, the surface of retaining member has evenly opened four wrench holes along the circumference, and the workman utilizes the locking and the pine of instrument cooperation wrench hole realization retaining member and piston rod to take off.
The utility model relates to a locking hydraulic cylinder, the inner wall of retaining member is opened there is the ring channel, and when the retaining member was rotatory and piston rod locking, the ring channel can prevent that the piston rod from taking place to collide with to the chromium-enriched layer of protection piston rod.
Drawings
Fig. 1 is a schematic view of the piston rod of the locking hydraulic cylinder of the present invention in a retracted state.
Fig. 2 is a schematic diagram of the locking hydraulic cylinder of the present invention when the piston rod is in the extended state for locking.
In the figure:
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1-2, the present invention relates to a locking hydraulic cylinder, which comprises a piston rod 1, a locking member 2, an annular groove 4, a guide sleeve 6, a piston 11 and a cylinder body 16.
The piston 11 is arranged in a cylinder 16, the piston 11 can slide in the cylinder 16, the piston 11 divides the cylinder 16 into a rod cavity 10 and a rodless cavity 15, and a second support ring 13 and a hole sealing ring 14 are arranged between the piston 11 and the cylinder 16; the seal ring 14 for hole prevents oil from flowing between the rod chamber 10 and the rodless chamber 15, and the second support ring 13 plays a role of supporting and guiding, and can prevent the cylinder 16 from being pulled.
An oil inlet is formed in the position, located in the rod cavity 10, of the cylinder body 16, and an oil outlet is formed in the position, located in the rodless cavity 15, of the cylinder body 16.
The inner end of the piston rod 1 is fixedly connected with the piston 11, a second fixing ring 12 is arranged between the piston rod 1 and the piston 11, and the second fixing ring 12 plays a role in fixing.
The guide sleeve 6 is sleeved on the piston rod 1, the piston rod 1 can slide in the guide sleeve 6, a dustproof ring 5, a shaft sealing ring 7 and a first supporting ring 8 are arranged between the guide sleeve 6 and the piston rod 1, the dustproof ring 5 is positioned on the inner wall of the guide sleeve 6 and close to the outer end of the guide sleeve 6, the first supporting ring 8 is positioned on the inner wall of the guide sleeve 6 and close to the inner end of the guide sleeve 6, the shaft sealing ring 7 is positioned in the middle of the inner wall of the guide sleeve 6, and the dustproof ring 5 prevents dust from entering the cylinder body 16; the shaft seal ring 7 prevents the cylinder body 16 from leaking oil, and the first support ring 8 plays a role in supporting and guiding and can prevent the piston rod 1 from being pulled.
The guide sleeve 6 is connected with the cylinder body 16 through threads, and an outer end stopping portion of the guide sleeve 6 is abutted against the outer end face of the cylinder body 16. A first fixing ring 9 is arranged between the guide sleeve 6 and the cylinder body 16, and the first fixing ring 9 plays a fixing role.
The outer end of piston rod 1 is provided with trapezoidal external screw thread 1.1, and the interior terminal surface of retaining member 2 offsets with the outer terminal surface of uide bushing 6, and open the inner wall of retaining member 2 has trapezoidal internal thread 2.1, and trapezoidal external screw thread 1.1 locks with trapezoidal internal thread 2.1 cooperation, and the surface of retaining member 2 is evenly opened along the circumference has four wrench holes 3, and the workman utilizes the locking and the pine of instrument cooperation wrench hole 3 realization retaining member 2 and piston rod 1 to take off.
The inner wall of retaining member 2 is opened there is ring channel 4, and when retaining member 2 was rotatory and piston rod 1 locking, ring channel 4 can prevent that piston rod 1 from taking place to collide with to the chromium layer of protection piston rod 1.
The working principle is as follows:
the utility model relates to a locking hydraulic cylinder, during the actual use, cylinder body 16, piston 11 and piston rod 1 are placed vertically, the outer end of piston rod 1 is up, piston 11 divides cylinder body 16 into there is pole chamber 10 and no pole chamber 15, there is the pole chamber 10 to have the oil outlet, there is the no pole chamber 15 to have the oil inlet;
locking: the oil inlet of the rodless cavity 15 pushes the piston 11/the piston rod 1 to extend outwards, when the piston rod 1 reaches a specified position and pressure maintaining is needed, the locking member 2 is screwed in from the outer end of the piston rod 1 until the inner end face of the locking member 2 abuts against the outer end face of the guide sleeve 6, at the moment, the rodless cavity 15 stops oil supply, the piston 11/the piston rod 1 bears inward force, the force borne by the piston rod 1 is transmitted to the locking member 2 through the trapezoidal threads, because the inner end face of the locking member 2 abuts against the outer end face of the guide sleeve 6, the piston rod 1 cannot retract, the trapezoidal threads can bear larger load, and the piston 11 is in a locking state.
Unlocking: the locking part 2 rotates reversely, the locking part 2 is loosened from the outer end of the piston rod 1, and the piston rod 1 retracts by self gravity or by hydraulic pressure supplied by hydraulic oil in the rod cavity 10.
In the above embodiments, the present invention has been described only by way of example, but various modifications may be made by those skilled in the art after reading the present patent application without departing from the spirit and scope of the invention.
Claims (7)
1. A locking hydraulic cylinder is characterized in that: the hydraulic cylinder comprises a piston rod, a locking piece, a guide sleeve, a piston and a cylinder body, wherein an oil inlet is formed in the position, located in a rod cavity, of the cylinder body, and an oil outlet is formed in the position, located in a rodless cavity, of the cylinder body;
the piston is arranged in the cylinder body and can slide in the cylinder body, the cylinder body is divided into a rod cavity and a rodless cavity by the piston, and the inner end of the piston rod is fixedly connected with the piston;
the guide sleeve is sleeved on the piston rod, the piston rod can slide in the guide sleeve, the outer wall of the guide sleeve is fixedly connected with the inner wall of the cylinder body, and an outer end stopping part of the guide sleeve is abutted against the outer end face of the cylinder body;
the outer end of the piston rod is provided with a trapezoidal external thread, the inner end face of the locking member is abutted to the outer end face of the guide sleeve, a trapezoidal internal thread is formed in the inner wall of the locking member, and the trapezoidal external thread is matched and locked with the trapezoidal internal thread.
2. A locking cylinder as claimed in claim 1, characterized in that: a second support ring and a hole sealing ring are arranged between the piston and the cylinder body.
3. A locking cylinder as claimed in claim 1, characterized in that: a second fixed ring is arranged between the piston rod and the piston.
4. A locking cylinder as claimed in claim 1, characterized in that: a dustproof ring, a shaft sealing ring and a first supporting ring are arranged between the guide sleeve and the piston rod, the dustproof ring is located on the inner wall of the guide sleeve and close to the outer end of the guide sleeve, the first supporting ring is located on the inner wall of the guide sleeve and close to the inner end of the guide sleeve, and the shaft sealing ring is located in the middle of the inner wall of the guide sleeve.
5. A locking cylinder as claimed in claim 1, characterized in that: a first fixing ring is arranged between the guide sleeve and the cylinder body.
6. A locking cylinder as claimed in claim 1, characterized in that: four wrench holes are uniformly formed on the outer surface of the locking piece along the circumference.
7. A locking cylinder as claimed in claim 1, characterized in that: the inner wall of the locking piece is provided with an annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921321917.6U CN210509795U (en) | 2019-08-15 | 2019-08-15 | Locking hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921321917.6U CN210509795U (en) | 2019-08-15 | 2019-08-15 | Locking hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210509795U true CN210509795U (en) | 2020-05-12 |
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ID=70589438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921321917.6U Active CN210509795U (en) | 2019-08-15 | 2019-08-15 | Locking hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210509795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864286A (en) * | 2021-09-30 | 2021-12-31 | 中船重工中南装备有限责任公司 | Self-locking device of sliding plate oil cylinder |
-
2019
- 2019-08-15 CN CN201921321917.6U patent/CN210509795U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864286A (en) * | 2021-09-30 | 2021-12-31 | 中船重工中南装备有限责任公司 | Self-locking device of sliding plate oil cylinder |
| CN113864286B (en) * | 2021-09-30 | 2024-02-06 | 中船重工中南装备有限责任公司 | Self-locking device of slide plate oil cylinder |
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