CN201511333U - Hydraulic torque wrench - Google Patents
Hydraulic torque wrench Download PDFInfo
- Publication number
- CN201511333U CN201511333U CN2009201987640U CN200920198764U CN201511333U CN 201511333 U CN201511333 U CN 201511333U CN 2009201987640 U CN2009201987640 U CN 2009201987640U CN 200920198764 U CN200920198764 U CN 200920198764U CN 201511333 U CN201511333 U CN 201511333U
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- CN
- China
- Prior art keywords
- oil
- wrench
- hydraulic torque
- torque wrench
- safety device
- 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.)
- Expired - Fee Related
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The utility model discloses a hydraulic torque wrench, comprising a wrench body (1) and an oil inlet channel (2) and an oil return channel (3) which are arranged in the wrench body (1), wherein the wrench body (1) is also internally provided with an overpressure protecting device; an oil inlet (4) of the overpressure protecting device is communicated with the oil return channel (3); and an oil discharging port (5) of the overpressure protecting device is communicated with the outside. The hydraulic torque wrench can effectively prevent the damage of a U-shaped sealing ring in a low-pressure pipeline so as to guarantee the reliable working of the hydraulic torque wrench.
Description
Technical field
The utility model relates to a kind of hydraulic tool, specifically is a kind of hydraulic torque wrench.
Background technology
Hydraulic torque wrench has on the market included a fuel feed hole, a spill port, piston component and rotating body component at present, and wherein fuel feed hole is connected with the pressure piping of hydraulic oil pumping plant, and spill port is connected with the low pressure pipeline of hydraulic oil pumping plant; Piston component and rotating body component all are located in the wrench body; The piston rod of piston component is connected with the ratchet of rotating body component; Be provided with the U RunddichtringO that partition piston component and rotating body component space are used between piston rod and the wrench body.Owing to have only in the hydraulic oil pumping plant over-pressure safety device be installed in the pressure piping; and over-pressure safety device is not installed in the low pressure pipeline; therefore just there is such problem: because low pressure pipeline stops up or other is former thereby when causing the low pressure pipeline internal pressure too high; be easy to damage the U RunddichtringO in the low pressure pipeline and make oil body from the piston component internal leakage to rotating body component; ratchet and ratchet are skidded, thereby reduce the functional reliability of whole hydraulic torque wrench.
The utility model content
The technical problems to be solved in the utility model is, overcomes the defective of above prior art, provides a kind of and can prevent that U RunddichtringO in the low pressure pipeline from damaging the hydraulic torque wrench with the functional reliability that guarantees hydraulic torque wrench.
The technical solution of the utility model is; a kind of hydraulic torque wrench is provided; comprise wrench body and be located at wrench body interior oil inlet passage and drainback passage; also be provided with over-pressure safety device in the described wrench body; the oil-in of described over-pressure safety device communicates with drainback passage, and the oil drain out of described over-pressure safety device communicates with the external world.
Described over-pressure safety device comprises body and is located at spheroid, spring base, spring and screw plug in the chamber body successively that described oil-in communicates with oil drain out by chamber body; The circular port of described spheroid and oil-in offsets; Described spheroid also offsets with spring base; Described spring base and spring offset; Described spring and screw plug offset; Described screw plug and body are spirally connected.
After adopting above structure, the utility model compared with prior art has the following advantages:
The utility model hydraulic torque wrench is in wrench body during the low pressure pipeline hypertonia; oil pressure by oil-in is pushed the spheroid in the over-pressure safety device open; make oil protect the U RunddichtringO not to be damaged by the oil drain out outflow of over-pressure safety device; prevent the oil inflow and cause ratchet and ratchet to skid, thereby improved the reliability of whole hydraulic torque wrench.
Description of drawings
Fig. 1 is the cutaway view of the utility model hydraulic torque wrench.
Fig. 2 is the partial enlarged drawing among Fig. 1.
Shown in the figure 1, wrench body, 2, oil inlet passage, 3, drainback passage, 4, oil-in, 5, oil drain out, 6, body, 7, spheroid, 8, spring base, 9, spring, 10, screw plug.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the utility model hydraulic torque wrench, comprise wrench body 1 and be located at oil inlet passage 2 and drainback passage 3 in the wrench body 1 that also be provided with over-pressure safety device in the described wrench body 1, the oil-in 4 of described over-pressure safety device communicates with drainback passage 3; The oil drain out 5 of described over-pressure safety device communicates with the external world.
Described over-pressure safety device comprises body 6 and is located at spheroid 7, spring base 8, spring 9 and screw plug 10 in body 6 inner chambers successively that described oil-in 4 communicates with oil drain out 5 by body 6 inner chambers; Described spheroid 7 is a steel, and the circular port of itself and oil-in 4 offsets its sealing function; Described spheroid 7 also offsets with spring base 8; Described spring base 8 offsets with spring 9; Described spring 9 offsets with screw plug 10; Just described spheroid 7 offsets with spring base 8 one ends, and an end of described spring base 8 other ends and spring 9 offsets, and described spring 9 other ends and screw plug 10 offset.Described screw plug 10 is spirally connected with body 6.
Flow by the oil bodies in oil inlet passage 2 and the drainback passage 3 during work and promote reciprocating motion of the pistons.When pressure in the low pressure pipeline of wrench body 1 surpassed setting value (too high), pressure was pushed the spheroid in the over-pressure safety device 7 open by oil-in, oil is flowed out by the over-pressure safety device oil drain out, and the pressure in the oil cylinder low pressure pipeline is descended.
Claims (2)
1. hydraulic torque wrench, comprise wrench body (1) and be located at wrench body (1) interior oil inlet passage (2) and drainback passage (3), it is characterized in that: described wrench body also is provided with over-pressure safety device in (1), and the oil-in of described over-pressure safety device (4) communicates with drainback passage (3); The oil drain out of described over-pressure safety device (5) communicates with the external world.
2. hydraulic torque wrench according to claim 1, it is characterized in that: described over-pressure safety device comprises body (6) and is located at spheroid (7), spring base (8), spring (9) and screw plug (10) in body (6) inner chamber successively that described oil-in (4) communicates with oil drain out (5) by body (6) inner chamber; Described spheroid (7) offsets with the circular port of oil-in (4); Described spheroid (7) also offsets with spring base (8); Described spring base (8) offsets with spring (9); Described spring (9) offsets with screw plug (10); Described screw plug (10) is spirally connected with body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201987640U CN201511333U (en) | 2009-10-22 | 2009-10-22 | Hydraulic torque wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201987640U CN201511333U (en) | 2009-10-22 | 2009-10-22 | Hydraulic torque wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201511333U true CN201511333U (en) | 2010-06-23 |
Family
ID=42482734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201987640U Expired - Fee Related CN201511333U (en) | 2009-10-22 | 2009-10-22 | Hydraulic torque wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201511333U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192341A (en) * | 2013-03-28 | 2013-07-10 | 马鞍山市三江机械有限公司 | Driving type hydraulic wrench |
-
2009
- 2009-10-22 CN CN2009201987640U patent/CN201511333U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192341A (en) * | 2013-03-28 | 2013-07-10 | 马鞍山市三江机械有限公司 | Driving type hydraulic wrench |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Saivs Machinery Co., Ltd. Assignor: Zhou Zhongwei Contract record no.: 2011330000978 Denomination of utility model: Detector for hydraulic torque wrench Granted publication date: 20100623 License type: Exclusive License Record date: 20110719 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100623 Termination date: 20141022 |
|
| EXPY | Termination of patent right or utility model |