CN108843656B - Overload protection device for rotary oil cylinder - Google Patents
Overload protection device for rotary oil cylinder Download PDFInfo
- Publication number
- CN108843656B CN108843656B CN201810965802.4A CN201810965802A CN108843656B CN 108843656 B CN108843656 B CN 108843656B CN 201810965802 A CN201810965802 A CN 201810965802A CN 108843656 B CN108843656 B CN 108843656B
- Authority
- CN
- China
- Prior art keywords
- sleeve
- load shaft
- gear
- clutch device
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 238000005461 lubrication Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention provides a rotary oil cylinder overload protection device, which aims to solve the problems that: and how to avoid failure of overload protection means caused by failure of the overflow valve or the pressure reducing valve and realize double-layer protection. The key points of the invention are as follows: the clutch device is arranged between the gear shaft hole and the driven load shaft, and is composed of a load shaft sleeve, a copper sleeve and an expansion sleeve from inside to outside, wherein the load shaft sleeve positioned at the innermost ring of the clutch device is in tight fit with the driven load shaft, and an adjusting screw of the expansion sleeve faces the outer end of the cylinder body. The application of the invention is as follows: is applied to driving the valve.
Description
Technical Field
The invention relates to a reciprocating rotary oil cylinder, in particular to an overload protection device for the rotary oil cylinder.
Background
At present, the closing and the closing of the large valve are realized by the driving of a rotary oil cylinder, namely, a valve shaft (hereinafter referred to as a driven load shaft) is directly matched with a gear shaft hole of the rotary oil cylinder, so as to drive the valve to operate. At present, overload protection of a rotary oil cylinder is realized by an overflow valve or a pressure reducing valve in a hydraulic system, and the overload protection is realized by reducing the hydraulic pressure in the hydraulic system. However, when the relief valve or the pressure reducing valve is jammed, the hydraulic pressure of the system is increased, the torque output by the rotary cylinder is correspondingly increased, and the driven equipment is easily damaged, for example, when the driven valve is jammed, the output torque may cause damage to the valve shaft.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an overload protection device for a rotary oil cylinder.
The purpose of the invention is realized in the following way: it includes gear shaft hole and cylinder body, characterized by: the clutch device is arranged between the gear shaft hole and the driven load shaft, and is composed of a load shaft sleeve, a copper sleeve and an expansion sleeve from inside to outside, wherein the load shaft sleeve positioned at the innermost ring of the clutch device is in tight fit with the driven load shaft, and an adjusting screw of the expansion sleeve faces the outer end (valve connecting end) of the cylinder body. The driven load shaft serves to define the mounting position of the clutch device and the inner diameter of the load shaft sleeve and is not part of the invention.
When the invention is used for driving a load shaft, the load shaft is inserted into the load shaft sleeve. When the gear outputs a set torque, the torque of the gear is output to the load shaft through the friction force between two adjacent components, and the load shaft is driven to rotate in a reciprocating manner, so that the clutch device is in a closed state; when the load is overloaded due to jamming fault and exceeds the set torque, sliding is generated between the gear shaft hole of the rotary oil cylinder and the expansion sleeve, the torque of the gear cannot be completely output to the load shaft, and the clutch device is in a disengaged state. Thus avoiding damage to the load due to overload. The clutch device is engaged when the gear outputs set torque and disengaged when the gear is overloaded, and is realized by adjusting the adjusting screw of the expansion sleeve.
How to realize overload protection of a rotary oil cylinder, the prior art starts from a hydraulic system and adopts a means of reducing pressure and releasing pressure; the invention starts from the connection between the gear shaft hole and the load shaft, and adopts a means of separating and combining the gear shaft hole and the load shaft. Therefore, the invention has the positive effects that the defect that the protection means is invalid due to the failure of the overflow valve or the pressure reducing valve is avoided; secondly, the invention can be added on the basis of the prior art to realize double insurance and improve the reliability of overload protection.
Drawings
The invention is further described below with reference to the drawings.
Fig. 1 is a schematic diagram of the present invention.
FIG. 2 is a section B-B of FIG. 1.
Detailed Description
The embodiment is applied to a driving valve, wherein 1 is a cylinder body, 2 is a rack, and 3 is a gear. The clutch device is arranged between the gear shaft hole and the valve shaft 7, specifically, the clutch device is sleeved with the load shaft sleeve 6, the copper sleeve 5 and the expansion sleeve 4 sequentially from inside to outside, the outer wall of the load shaft sleeve is in a step shape, namely, the appearance of the load shaft sleeve is in a convex-word right-handed 90-degree shape, a small diameter section of the outer wall of the load shaft sleeve is adjacent to the outer end of the cylinder body, namely, the valve connecting end 10, the copper sleeve and the expansion sleeve are sleeved on the small diameter section of the outer wall of the load shaft sleeve sequentially, and the adjusting screw 8 of the expansion sleeve faces the outer end of the cylinder body, namely, the valve connecting end 10. The clutch device is shaped like a convex left-hand 90 degrees. Correspondingly, the gear shaft hole 11 (after the gear shaft hole expands radially) takes a shape that cooperates with the clutch means, i.e. the clutch means can be mounted in the gear shaft hole. In order to enable the clutch device to be installed in the gear shaft hole for positioning, the clutch device and the gear shaft hole are provided with rabbets, and an oil-free lubrication bearing 9 is arranged between the large-diameter section of the outer wall of the load shaft sleeve and the gear.
When the invention is used for driving the load shaft, the valve shaft 7 is inserted into the load shaft sleeve, and the load shaft sleeve is tightly matched with the valve shaft. When the gear outputs a set torque, the torque of the gear is output to the load shaft through the friction force between two adjacent components, and the load shaft is driven to rotate in a reciprocating manner, so that the clutch device is in a closed state; when the load is overloaded due to jamming fault and exceeds the set torque, sliding is generated between the gear shaft hole of the rotary oil cylinder and the expansion sleeve, the torque of the gear cannot be completely output to the load shaft, and the clutch device is in a disengaged state. Thus avoiding damage to the load due to overload. The clutch device is engaged when the gear outputs set torque and disengaged when the gear is overloaded, and is realized by adjusting the adjusting screw of the expansion sleeve.
Claims (2)
1. The utility model provides a rotary cylinder overload protection device, it includes gear shaft hole and cylinder body, characterized by: a clutch device is arranged between the gear shaft hole and the driven load shaft, the clutch device is sequentially sleeved with a load shaft sleeve, a copper sleeve and an expansion sleeve from inside to outside, wherein the load shaft sleeve positioned at the innermost ring of the clutch device is tightly matched with the driven load shaft, and an adjusting screw of the expansion sleeve faces the outer end of the cylinder body; when the gear outputs a set torque, friction force is generated between two adjacent components, namely, the clutch is in an on state, and when the load exceeds the set torque, sliding is generated between the gear shaft hole and the expansion sleeve, namely, the clutch is in an off state.
2. The overload protection device for a rotary cylinder according to claim 1, wherein: the outer wall of the load shaft sleeve is in a step shape, namely the shape of the load shaft sleeve is in a convex shape with 90 degrees of right rotation, wherein the small diameter section of the outer wall of the load shaft sleeve is adjacent to the outer end of the cylinder body, and the copper sleeve and the expansion sleeve are sleeved on the small diameter section of the outer wall of the load shaft sleeve in sequence; the clutch device is in a convex left-hand 90-degree shape, the clutch device and the gear shaft hole are provided with rabbets, and an oil-free lubrication bearing is arranged between the large-diameter section of the outer wall of the load shaft sleeve and the gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965802.4A CN108843656B (en) | 2018-08-23 | 2018-08-23 | Overload protection device for rotary oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965802.4A CN108843656B (en) | 2018-08-23 | 2018-08-23 | Overload protection device for rotary oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843656A CN108843656A (en) | 2018-11-20 |
| CN108843656B true CN108843656B (en) | 2024-04-12 |
Family
ID=64188846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810965802.4A Active CN108843656B (en) | 2018-08-23 | 2018-08-23 | Overload protection device for rotary oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843656B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529454B (en) * | 2019-09-05 | 2020-11-17 | 台州百特工具有限公司 | Hydraulic rod with overload protection hydraulic oil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4799644A (en) * | 1987-02-16 | 1989-01-24 | G.T.I. du Gaianigo Umberto & Co. Snc | Actuator activating on-off valves |
| CN101332565A (en) * | 2008-07-29 | 2008-12-31 | 张家港玉成精机有限公司 | Clamp for milling excircle |
| CN208804077U (en) * | 2018-08-23 | 2019-04-30 | 沈阳东北电力调节技术有限公司 | Rotary oil cylinder overload protection arrangement |
-
2018
- 2018-08-23 CN CN201810965802.4A patent/CN108843656B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4799644A (en) * | 1987-02-16 | 1989-01-24 | G.T.I. du Gaianigo Umberto & Co. Snc | Actuator activating on-off valves |
| CN101332565A (en) * | 2008-07-29 | 2008-12-31 | 张家港玉成精机有限公司 | Clamp for milling excircle |
| CN208804077U (en) * | 2018-08-23 | 2019-04-30 | 沈阳东北电力调节技术有限公司 | Rotary oil cylinder overload protection arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843656A (en) | 2018-11-20 |
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| SE01 | Entry into force of request for substantive examination | ||
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| GR01 | Patent grant | ||
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