CN112460131A

CN112460131A - Hydraulic anti-loosening bolt and hydraulic anti-loosening bolt and nut fastening device

Info

Publication number: CN112460131A
Application number: CN202011357853.2A
Authority: CN
Inventors: 朱振武; 谭强斌; 朱志胤
Original assignee: Tianhai Aeroengine Co ltd
Current assignee: Tianhai Aeroengine Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-03-09
Anticipated expiration: 2040-11-27
Also published as: CN112460131B

Abstract

The invention discloses a hydraulic anti-loosening bolt and nut fastening device. And then the nut and the hydraulic anti-loosening column system are simultaneously controlled through a specially designed tightening device, so that the tightening action of the bolt is realized. The hydraulic anti-loosening bolt and nut fastening device is simple in structure, easy to operate, good in anti-loosening effect and capable of being used repeatedly.

Description

Hydraulic anti-loosening bolt and hydraulic anti-loosening bolt and nut fastening device

Technical Field

The invention relates to a fastening device, in particular to a hydraulic anti-loosening bolt and nut fastening device, and belongs to the technical field of general machinery.

Background

With the vigorous development of mechanical devices in China, fastening of mechanical mechanisms in a plurality of mechanical devices needs to be assembled in a replaceable mode. And nuts and bolts are the most widely used detachable fastening devices. The application of the detachable fastening device can greatly reduce the production difficulty of the mechanical device and improve the repair efficiency of the mechanical device.

In practical application, a plurality of high-frequency vibration working conditions exist in the use scene of the nut and bolt fastening device, and the loosening condition can occur in the application of the common nut and bolt fastening device under the high-frequency vibration working condition, particularly on a high-speed railway body or an engine. It causes great hidden trouble to the production construction.

In order to solve the technical problem, in the prior art, the following methods are generally adopted to perform self-locking on a nut and bolt fastening device. Such as: shortening the thread pitch of the nut, matching and self-locking double bolts, tightly pushing a spring gasket, welding the bolt, destroying the screwed-out thread of the bolt and the like. The practical use condition shows that nut screw thread pitch shortens, two bolt cooperation auto-locks, spring shim top tightly etc. do have certain locking efficiency, but when meetting the operating mode that the vibration frequency is high and the period is long, the nut bolt will produce not hard up certainly. And the bolt welds dead, destroys schemes such as bolt back-out screw thread, when meetting to dismantle mechanical device, needs earlier the bolt cut off, and the nut is taken off in the pine again, can greatly influence work efficiency and cause unnecessary waste.

Therefore, how to provide a locking bolt or a locking bolt and nut fastening device, which is always free from the influence of vibration or can offset the influence of vibration under the working condition of high-frequency vibration, thereby obtaining the effect of preventing the nut-bolt fastening device from loosening. How to provide a locking bolt or a locking bolt and nut fastening device is the research direction of the prior art.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a hydraulic anti-loosening column system arranged in a bolt and a fastening device formed by the anti-loosening bolt and a nut. Firstly, a bolt is screwed into a gasket (the gasket is fixed on a fastener) or the fastener by a specially designed special tightening device to finish the fastening operation; then after the bolt is tightened and the tightening device is loosened, a spring in the hydraulic anti-loosening column system can eject the pin shaft and insert the pin shaft into a jack on a gasket or a fastener; therefore, in the vibration process, the aim of preventing looseness is fulfilled due to the fact that the force generated by vibration is offset by the acting force of the pin shaft and the jack, and the effect that the fastening device of the bolt and the nut is not affected by vibration and loosens is achieved.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

according to a first embodiment of the invention, a hydraulic anti-loosening bolt is provided, which comprises a nut, a screw and an external thread. The nut is arranged on the screw rod. The external thread is arranged on the outer surface of the screw rod. The anti-loosening bolt further comprises a through hole and an accommodating cavity. The through hole is formed in the upper surface of the nut. The containing cavity is formed in the lower surface of the screw cap. The bottom end of the through hole is communicated with the top end of the accommodating cavity. The through hole and the containing cavity are both positioned in the screw cap between the outer wall of the screw rod and the outer wall of the screw cap. And a hydraulic anti-loosening column system is also arranged in the accommodating cavity.

Preferably, the hydraulic locking column system comprises an outer shell, an inner shell, a pusher, a pin shaft and an elastic element. The inner shell and the pusher are both arranged in the inner cavity of the outer shell, and the pusher is sleeved on the upper part of the inner shell. The pin shaft and the elastic piece are both arranged in the inner cavity of the inner shell, and the elastic piece is located above the top end of the pin shaft.

Preferably, the elastic element is one of a spring, a spring sheet and an elastic colloid.

Preferably, the upper surface of the nut is further provided with a tightening mechanism. The tightening mechanism is a protrusion and/or a groove.

Preferably, the outer shell is a cylindrical structure with an open top end and a cavity inside. And a shaft hole is formed in the bottom surface of the cavity of the outer shell.

Preferably, the inner shell is a cylindrical structure with an open bottom end and a cavity inside. The top surface of the inner shell cavity is provided with a vent hole. And a hydraulic oil hole is formed in the side wall of the bottom of the inner shell. The bottom mounting of inner shell body lateral wall sets up on the bottom surface of outer casing, just the bottom opening of interior casing has enclosed completely the shaft hole.

Preferably, the pusher comprises a push rod and a pressing barrel. The pressing barrel is of a cylindrical structure with an opening at the bottom end and a cavity inside. The push rod is arranged on the top surface of the pressing barrel. The top surface of the pressing barrel is also provided with an airflow hole. The pressure barrel sleeve is arranged at the top end of the inner shell, and the barrel wall of the pressure barrel extends into the annular columnar cavity between the inner wall of the outer shell and the outer wall of the inner shell and can freely stretch out and draw back in the annular columnar cavity.

Preferably, the pin comprises a cap and a shaft. The shaft cap is positioned in the inner cavity of the inner shell, and the diameter of the shaft cap is larger than the caliber of the shaft hole. The top end of the shaft lever is connected with the shaft cap. The bottom end of the shaft lever extends into the shaft hole. The shaft cap can freely stretch out and draw back in the inner cavity of the inner shell, and the shaft rod can freely stretch out and draw back in the shaft hole.

Preferably, the bottom end of the barrel wall of the pressure barrel, the inner wall of the outer shell, the inner bottom surface of the outer shell and the outer wall of the inner shell form a hydraulic oil outer cavity together. And a hydraulic oil inner chamber is formed among the bottom surface of the shaft cap, the inner wall of the inner shell, the inner bottom surface of the outer shell and the outer wall of the shaft rod. The hydraulic oil inner chamber is communicated with the hydraulic oil outer chamber through the hydraulic oil hole. And sealing pieces are arranged at the bottom end of the barrel wall of the pressure barrel, the end part of the side wall of the shaft cap and the upper end of the inner wall of the shaft hole.

Preferably, the sealing member is a sealing rubber.

Preferably, the hydraulic anti-loosening bolt further comprises a tightening device. The tightening device is arranged at the upper end of the anti-loosening bolt. The tightening device comprises a handle, a tightening head, a tightening part and a through rod. The tightening head is of a columnar structure. One end of the handle is fixed on the outer side wall of the tightening head. The tightening part and the through rod are both arranged on the lower surface of the tightening head.

Preferably, the tightening part is a protrusion and/or a groove.

According to a second embodiment of the present invention, there is provided a hydraulic type looseness prevention bolt and nut tightening device, which includes a looseness prevention bolt and a nut. The anti-loosening bolt is assembled with the nut through external threads. The anti-loosening bolt comprises a nut, a screw and an external thread. The nut is arranged on the screw rod. The external thread is arranged on the outer surface of the screw rod. The nut includes a nut body, a threaded bore, and internal threads. The threaded hole is arranged on the nut body. The internal thread is arranged on the inner wall of the threaded hole. The anti-loosening bolt further comprises a through hole and an accommodating cavity. The through hole is formed in the upper surface of the nut. The containing cavity is formed in the lower surface of the screw cap. The bottom end of the through hole is communicated with the top end of the accommodating cavity. The through hole and the containing cavity are both positioned in the screw cap between the outer wall of the screw rod and the outer wall of the screw cap. And a hydraulic anti-loosening column system is also arranged in the accommodating cavity.

Preferably, the bottom end of the barrel wall of the pressure barrel, the inner wall of the outer shell, the inner bottom surface of the outer shell and the outer wall of the inner shell form a hydraulic oil outer cavity together. And a hydraulic oil inner chamber is formed among the bottom surface of the shaft cap, the inner wall of the inner shell, the inner bottom surface of the outer shell and the outer wall of the shaft rod. The hydraulic oil inner chamber is communicated with the hydraulic oil outer chamber through the hydraulic oil hole. And sealing parts are arranged at the bottom end of the barrel wall of the pressure barrel, the end part of the side wall of the shaft cap and the inner wall of the shaft hole.

Preferably, the sealing member is a sealing rubber.

Preferably, the device further comprises a tightening device. The tightening device is arranged at the upper end of the anti-loosening bolt. The tightening device comprises a handle, a tightening head, a tightening part and a through rod. The tightening head is of a columnar structure. One end of the handle is fixed on the outer side wall of the tightening head. The tightening part and the through rod are both arranged on the lower surface of the tightening head.

Preferably, the tightening part is a protrusion and/or a groove.

Preferably, the device further comprises a gasket. The washer is disposed between the fastener and the anti-loosening bolt. The gasket is of an annular columnar structure. The gasket is fixed on the fastener, and an anti-loosening jack for inserting the pin shaft is formed in the gasket.

Preferably, the fastening piece is provided with a fixed insertion hole for inserting the pin shaft, and the fixed insertion hole and the anti-loosening insertion hole are overlapped in the vertical direction.

Preferably, a protrusion-groove type anti-loosening combined structure is arranged between the nut and the fastening piece.

In the invention, the anti-loosening bolt is provided with a containing cavity, a hydraulic anti-loosening column system is arranged in the containing cavity, and the hydraulic anti-loosening column system controls the ejection and recovery of the anti-loosening column (namely a pin shaft) in a hydraulic mode. When the bolt needs to be screwed or loosened, the screwing device controls the locking column to be retracted into the hydraulic locking column system through the hydraulic system (the hydraulic locking column system is integrally arranged in the accommodating cavity), and the bolt can be screwed and loosened by screwing the bolt. After the bolt has been screwed up, at this moment, external force no longer is exerted to the bolt, and the locking post (round pin axle) of hydraulic pressure is popped out automatically and is inserted in the fixed orifices of mounting (perhaps through inserting the locking jack that becomes flexible that sets up on the gasket and realize locking purpose not hard up, at this moment, the gasket need with form fixed connection between the mounting), and then realize not receiving the vibration effect and produce the purpose of becoming flexible after the bolt is screwed up. The hydraulic locking column system has the function that when the bolt is assembled and disassembled, the hydraulic locking column system can control the locking column to be in a retraction state so as not to influence the assembling and disassembling operation; on the contrary, after the bolt is installed, the hydraulic locking column system can control the locking column to be in a popup state. The pop-up state can be regarded as the natural state of the anti-loosening bolt under the action of no external force. The anti-loosening bolt provided with the hydraulic anti-loosening column system can be used repeatedly while quickly completing the conversion of assembling and disassembling, and the anti-loosening function of the anti-loosening bolt is not influenced.

In the invention, the through hole and the accommodating cavity are both arranged on the screw cap, and the through hole is arranged on the upper surface of the screw cap. The containing cavity is formed in the lower surface of the screw cap. The bottom end of the through hole is communicated with the top end of the accommodating cavity. Namely, the through hole and the accommodating cavity are both positioned in the screw cap between the outer wall of the screw rod and the outer wall of the screw cap. It should be noted that the aperture of the through hole is smaller than the aperture of the accommodating cavity. That is to say, the top end of the accommodating cavity is communicated with the bottom end of the through hole. The top of the accommodating cavity is an annular cavity top with a circle of openings surrounding the bottom end of the through hole. The purpose that sets up this chamber top is when the locking post system of hydraulic pressure is laid to the holding intracavity, and this annular chamber top can play and block the locking post system of hydraulic pressure and fall to the effect in the through-hole, also is simultaneously for the locking post (round pin axle) pop out in the locking post system of hydraulic pressure and provide the impetus of reaction force. Furthermore, in order to enable the upper end of the hydraulic anti-loosening column system and the lower end of the through hole to have a certain air flowing cavity, a circle of annular edge part with a larger inner ring caliber (or the thickness of the annular cavity top is increased) can be arranged on the lower surface of the annular cavity top, and the annular edge part replaces the original annular cavity top to serve as a new blocking end and an acting point of the hydraulic anti-loosening column system.

In the invention, the hydraulic anti-loosening column system comprises an outer shell, an inner shell, a pusher, a pin shaft and an elastic piece. Wherein, the fixed setting of interior casing is inside the shell body, just the external diameter of interior casing is less than the internal diameter of shell body, the height of interior casing also is less than the height of shell body. Namely, a certain distance is reserved between the outside of the inner shell and the inner wall of the outer shell, and a certain distance is reserved between the bottom end of the inner shell and the bottom end of the outer shell. It should be noted that the outer shell and the inner shell are both of a cylindrical structure with a cavity, wherein the upper end of the outer shell is of an open design, and the lower end of the inner shell is also of an open design; and meanwhile, a shaft hole for the shaft lever of the pin shaft to pass through is formed in the bottom surface of the outer shell, and an air vent for air circulation is formed in the top surface of the inner shell. The fixed setting of interior casing back-off is in the inner chamber of shell body, promptly the lower extreme marginal portion of interior casing and the bottom surface fixed connection of shell body (can the integrated into one piece casting be made if necessary), the bore in shaft hole is less than the internal diameter of interior casing, and when interior casing back-off set up, the shaft hole was covered in its lower part opening by interior casing completely. Meanwhile, a through hole (hydraulic oil through hole) is further formed in the side wall of the lower end of the inner shell, and the through hole is communicated with the inner cavity of the inner shell and a space formed between the outer wall of the inner shell and the inner wall of the outer shell (namely communicated with a hydraulic oil inner cavity and a hydraulic oil outer cavity).

Further, the pushing device is also arranged in the inner cavity of the outer shell and positioned at the top of the inner shell, the pushing device comprises a barrel-shaped structure (namely a pressing barrel) with the lower end in an open design and a push rod with a cylindrical structure arranged at the upper part of the top end of the pushing device, and meanwhile, an airflow hole for air circulation is formed in the upper surface of the pressing barrel. The external diameter of pressing the bucket is less than the internal diameter of shell body, the internal diameter of pressing the bucket is greater than the external diameter of interior casing, promptly the bucket wall of pressing the bucket can inlay and insert the space that forms between the outer wall that gets into interior casing and the shell body inner wall (can cup joint the outside at interior casing completely). Furthermore, the diameter of the pressure rod is smaller than the caliber of the through hole, namely the pressure rod is positioned right below the through hole, and the top end of the pressure rod can freely stretch into and out of the through hole.

In the present invention, the pin shaft includes a shaft rod and a shaft cap. The shaft cap and the shaft rod are both of cylindrical structures, and the shaft cap is arranged in the inner cavity of the inner shell (namely the diameter of the shaft cap is smaller than the inner diameter of the inner cavity of the inner shell). One end of the shaft rod is fixed on the shaft cap, the other end of the shaft rod is telescopically inserted into the pin shaft hole (namely the diameter of the shaft rod is smaller than the aperture of the pin shaft hole), the shaft cap can freely move in the inner cavity of the inner shell, and the shaft rod freely stretches in the pin shaft hole.

In the present invention, the elastic member (e.g., a spring) is also disposed in the inner cavity of the inner housing and located at the upper end of the pin shaft, i.e., the top end of the elastic member is connected to the top of the inner cavity of the inner housing, and the bottom end of the elastic member is connected to the upper surface of the shaft cap.

In the invention, a cavity formed among the bottom end of the barrel wall of the pressure barrel, the inner wall of the outer shell, the inner bottom surface of the outer shell and the outer wall of the inner shell is an outer hydraulic oil cavity. And a cavity formed among the bottom surface of the shaft cap, the inner wall of the inner shell, the inner bottom surface of the outer shell and the outer wall of the shaft rod is a hydraulic oil inner cavity. The hydraulic oil inner chamber is communicated with the hydraulic oil outer chamber through the hydraulic oil hole. The bottom of pressing the bucket bung wall, the lateral wall tip of axle cap, the inner wall upper end department in shaft hole (for better sealed effect, the sealing member can extend and cover the lateral wall of partial pressure bucket, axle cap and shaft hole) all is provided with the sealing member. The hydraulic oil outer chamber and the hydraulic oil inner chamber integrally form a completely closed chamber under the action of the sealing piece, and the closed chamber is filled with hydraulic oil. When the push rod to bulldozing ware acts on decurrent power, the push rod pushes away the pressure bucket downstream, the lower extreme (the cladding that presses the bucket has the sealing member) can promote the hydraulic oil in the hydraulic oil exocoel and enter into the hydraulic oil intracavity via the hydraulic pressure oilhole, because more hydraulic oil have been injected into in the hydraulic oil intracavity, under the condition of hydraulic pressure increase this moment, hydraulic oil can promote the lower surface upward movement of axle cap, the axle cap also can drive the axostylus axostyle upward movement simultaneously, accomplish the back action that contracts of axostylus axostyle from the round pin downthehole promptly, the elastic. When the force acting on the push rod of the pusher is cancelled, the compressed elastic piece can push the shaft cap to move downwards, the shaft cap then pushes the shaft rod to extend out of the pin shaft hole (the shaft rod extends out of the pin shaft hole), and at the moment, the hydraulic oil in the hydraulic inner cavity flows back into the hydraulic oil outer cavity through the hydraulic oil hole. The repeated extending and retracting actions of the pin shaft in the pin shaft hole can be realized by the circulation.

In the invention, the top end of the inner shell is provided with a vent hole, and the top end of the pusher is provided with an airflow hole, and the purpose is as follows: when the shaft cap in the inner shell moves upwards under the action of hydraulic oil, air in a cavity between the upper surface of the shaft cap and the top of the inner shell (namely in a cavity where the elastic piece is located) can flow into a cavity formed by the upper end of the inner shell and the inner wall of the pressure barrel through the vent hole, and then is discharged to the outside through the airflow hole and the through hole. Through the arrangement of the air holes and the air flow holes, the purposes of exchanging air in the inner shell with the external air flow and maintaining the balance of internal and external air pressure are achieved, and the free movement of the shaft cap in the inner shell is ensured.

In the invention, the tightening device is a specially-arranged special tightening device matched with the anti-loosening bolt and comprises a handle, a columnar tightening head connected with the handle, a tightening part and a through rod, wherein the tightening part and the through rod are arranged on the lower surface of the columnar tightening head (the tightening part and the through rod are arranged on the same lower surface). The tightening part is a protrusion or a groove (the tightening part needs to be matched with the groove and the protrusion on the upper surface of the bolt so as to tighten and loosen the bolt). The diameter of the through rod needs to be smaller than the caliber of the through hole in the bolt, so that the through rod can conveniently apply pushing force to the pushing device after penetrating through the through hole. It should be noted that, while the tightening mechanism of the tightening part acts on the bolt, the through rod also needs to complete the action of the pushing and pressing device, that is, only when the two simultaneously complete the action purpose, the tightening of the bolt can be realized (the through rod realizes the operation that the pin shaft retracts into the pin shaft hole through the pushing and pressing device, at this time, the rotation of the bolt is not limited by the pin shaft, so the tightening part can realize the tightening operation of the bolt through the interaction with the tightening mechanism in real time).

In the present invention, the length of the nut can be designed according to the actual working condition, and is, for example, 0.1mm to 10m, preferably 1mm to 5m, more preferably 2mm to 2m, still more preferably 3mm to 1m, and still more preferably 5mm to 0.5 m.

In the present invention, the diameter of the nut may be designed according to the actual working condition, and is, for example, 0.1mm to 2m, preferably 1mm to 1m, more preferably 1.5mm to 0.8m, still more preferably 2mm to 0.5m, and still more preferably 2.5mm to 0.4 m.

In the present invention, the thread pitch of the thread structure of the nut may be designed according to the actual working condition, and is, for example, 0.01mm to 1m, preferably 0.02mm to 0.8m, more preferably 0.03mm to 0.6m, and still more preferably 0.04mm to 0.5 m.

In the present invention, the length of the screw of the anti-loosening bolt can be designed according to the actual working condition, and is, for example, 0.1mm to 10m, preferably 1mm to 5m, more preferably 2mm to 1m, further preferably 3mm to 0.5m, and further preferably 5mm to 0.2 m.

In the present invention, the diameter of the nut of the anti-loosening bolt can be designed according to the actual working condition, and is, for example, 0.1mm to 2m, preferably 1mm to 1m, more preferably 1.5mm to 0.8m, further preferably 2mm to 0.5m, and further preferably 2.5mm to 0.4 m.

In the present invention, the outer diameter of the hydraulic lock column system can be designed according to the actual working condition, and is, for example, 0.1mm to 1.5m, preferably 0.5mm to 1.2m, more preferably 1mm to 1.2m, further preferably 2mm to 0.8m, and further preferably 5mm to 0.5 m.

In the present invention, the pitch of the thread structure of the anti-loosening bolt may be designed according to the actual working condition, and is, for example, 0.01mm to 1m, preferably 0.02mm to 0.8m, more preferably 0.03mm to 0.6m, and still more preferably 0.04mm to 0.5 m.

In the present invention, the number of the tightening parts and the number of the tightening mechanisms are the same, and may be designed according to actual conditions, for example, 1 to 50, preferably 2 to 40, more preferably 3 to 30, and further preferably 4 to 20.

In the invention, the number of the through rods, the number of the through holes, the number of the accommodating cavities and the number of the hydraulic anti-loosening column systems are the same, and can be designed according to actual working conditions, for example, 1 to 60, preferably 2 to 50, more preferably 3 to 40, and further preferably 4 to 30.

It should be noted that the parameter data are for better describing the technical solution of the present invention, and are not taken as a basis for limiting the protection scope of the present invention, and the number of the parameter changes, the simple replacement of the shape structure, etc. without departing from the concept of the present invention should fall within the protection scope of the present invention.

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

1. the invention adopts the mode of combining the special hydraulic anti-loosening column system with the bolt, realizes the anti-loosening purpose of the bolt and nut fastening device, and has simple design structure and good anti-loosening effect.

2. The anti-loosening bolt and the bolt and nut fastening device are convenient to disassemble and can be repeatedly and circularly used, repeated disassembly of the fixing piece is facilitated, meanwhile, the loss of the bolt and nut fastening assembly is avoided, and the production cost is reduced.

3. The anti-loosening bolt and the bolt and nut fastening device have strong application type, can meet the fastening requirements of most fastening pieces according to actual requirements, are easy to popularize and have very obvious economic benefit.

Drawings

Fig. 1 is a structural view of a hydraulic anti-loosening bolt and nut fastening device according to the present invention.

Fig. 2 is a nut structure view of the hydraulic anti-loosening bolt according to the present invention.

Fig. 3 is a sectional structure view of the hydraulic anti-loosening bolt according to the present invention.

Fig. 4 is a sectional structure view of the hydraulic check column system of the present invention.

Fig. 5 is a sectional structure view of the connection between the outer casing and the inner casing of the hydraulic check column system according to the present invention.

FIG. 6 is a diagram of the structure of the pusher of the hydraulic check cylinder system of the present invention.

Fig. 7 is a structural view of a tightening apparatus according to the present invention.

Fig. 8 is a structure view of the pin shaft according to the present invention.

Fig. 9 is a view showing the structure of the nut according to the present invention.

Fig. 10 is a structural view of the gasket provided with the anti-loosening jack according to the present invention.

Fig. 11 is a schematic view of the fixing member with a fixing insertion hole according to the present invention.

Reference numerals: 1: a locking bolt; 101: a nut; 102: a screw; 103: an external thread; 104: a through hole; 105: an accommodating cavity; 106: a tightening mechanism; 2: a hydraulic check column system; 201: an outer housing; 20101: a shaft hole; 202: an inner housing; 20201: a vent hole; 20202: a hydraulic oil hole; 203: a pusher; 20301: a push rod; 20302: pressing the barrel; 20303: an airflow aperture; 204: a pin shaft; 20401: a shaft cap; 20402: a shaft lever; 205: an elastic member; 206: a seal member; 3: a nut; 301: a nut body; 302: a threaded hole; 303: an internal thread; 4: tightening the device; 401: a handle; 402: tightening a head; 403: a tightening part; 404: a through rod; 5: a gasket; 501: an anti-loosening jack; 6: a fastener; 601: fixing the jack; a: a hydraulic oil outer chamber; b: and a hydraulic oil inner chamber.

Detailed Description

The technical solution of the present invention is illustrated below, and the claimed scope of the present invention includes, but is not limited to, the following examples.

A hydraulic anti-loosening bolt 1 comprises a nut 101, a screw 102 and an external thread 103. The nut 101 is arranged on the screw 102. The external thread 103 is provided on the outer surface of the screw 102. The anti-loosening bolt 1 further comprises a through hole 104 and an accommodating cavity 105. The through hole 104 is opened in the upper surface of the nut 101. The receiving cavity 105 is formed in the lower surface of the nut 101. The bottom end of the through hole 104 is communicated with the top end of the accommodating cavity 105. The through hole 104 and the accommodating cavity 105 are both located in the nut 101 between the outer wall of the screw 102 and the outer wall of the nut 101. A hydraulic locking column system 2 is also arranged in the accommodating cavity 105.

A hydraulic anti-loosening bolt and nut fastening device comprises an anti-loosening bolt 1 and a nut 3. The anti-loosening bolt 1 is assembled with the nut 3 through an external thread 103. The anti-loosening bolt 1 comprises a nut 101, a screw 102 and an external thread 103. The nut 101 is arranged on the screw 102. The external thread 103 is provided on the outer surface of the screw 102. The nut 3 includes a nut body 301, a threaded hole 302, and an internal thread 303. The threaded hole 302 is provided in the nut body 301. The internal thread 303 is provided on the inner wall of the threaded hole 302. The anti-loosening bolt 1 further comprises a through hole 104 and an accommodating cavity 105. The through hole 104 is opened in the upper surface of the nut 101. The receiving cavity 105 is formed in the lower surface of the nut 101. The bottom end of the through hole 104 is communicated with the top end of the accommodating cavity 105. The through hole 104 and the accommodating cavity 105 are both located in the nut 101 between the outer wall of the screw 102 and the outer wall of the nut 101. A hydraulic locking column system 2 is also arranged in the accommodating cavity 105.

Preferably, the hydraulic locking column system 2 comprises an outer shell 201, an inner shell 202, a pusher 203, a pin 204 and an elastic element 205. The inner shell 202 and the pusher 203 are both arranged in the inner cavity of the outer shell 201, and the pusher 203 is sleeved on the upper part of the inner shell 202. The pin 204 and the elastic element 205 are both arranged in the inner cavity of the inner shell 202, and the elastic element 205 is located above the top end of the pin 204

Preferably, the elastic element 205 is one of a spring, a spring plate, and an elastic gel.

Preferably, the upper surface of the nut 101 is further provided with a tightening mechanism 106. The tightening mechanism 106 is a protrusion and/or a groove.

Preferably, the outer casing 201 is a cylindrical structure with an open top end and a cavity inside. The bottom surface of the cavity of the outer shell 201 is provided with a shaft hole 20101.

Preferably, the inner housing 202 is a cylindrical structure with an open bottom end and a hollow cavity inside. The top surface of the cavity of the inner shell 202 is provided with a vent hole 20201. The side wall of the bottom of the inner shell 202 is provided with a hydraulic oil hole 20202. The bottom end of the side wall of the inner shell 202 is fixedly arranged on the bottom surface of the outer shell 201, and the bottom end opening of the inner shell 202 completely surrounds the shaft hole 20101.

Preferably, the pusher 203 includes a pushing rod 20301 and a pressing barrel 20302. The pressing barrel 20302 is a cylindrical structure with an open bottom end and a cavity inside. The push rod 20301 is disposed on the top surface of the pressure barrel 20302. An air flow hole 20303 is further formed on the top surface of the pressure barrel 20302. The pressing barrel 20302 is sleeved on the top end of the inner housing 202, and the barrel wall of the pressing barrel 20302 extends into the annular cylindrical cavity between the inner wall of the outer housing 201 and the outer wall of the inner housing 202 and can freely extend and retract in the annular cylindrical cavity.

Preferably, the pin 204 includes a cap 20401 and a shaft 20402. The shaft cap 20401 is located in the inner cavity of the inner shell 202, and the diameter of the shaft cap 20401 is larger than the caliber of the shaft hole 20101. The top end of the shaft 20402 is connected to a shaft cap 20401. The bottom end of the shaft rod 20402 extends into the shaft hole 20101. The cap 20401 is freely retractable in the inner cavity of the inner housing 202, and the shaft 20402 is freely retractable in the shaft hole 20101.

Preferably, the bottom end of the barrel wall of the pressure barrel 20302, the inner wall of the outer shell 201, the inner bottom surface of the outer shell 201 and the outer wall of the inner shell 202 together form an hydraulic oil outer chamber a. The bottom surface of the shaft cap 20401, the inner wall of the inner shell 202, the inner bottom surface of the outer shell 201 and the outer wall of the shaft rod 20402 form a hydraulic oil inner chamber B. The hydraulic oil inner chamber B is communicated with the hydraulic oil outer chamber A through a hydraulic oil hole 20202. The bottom end of the barrel wall of the pressure barrel 20302, the end part of the side wall of the shaft cap 20401 and the upper end of the inner wall of the shaft hole 20101 are all provided with sealing elements 206.

Preferably, the sealing member 206 is a sealing rubber.

Preferably, the device further comprises a tightening device 4. The tightening device 4 is provided at the upper end of the anti-loosening bolt 1. The tightening device 4 includes a handle 401, a tightening head 402, a tightening portion 403, and a through-rod 404. The tightening head is of a columnar structure. One end of the handle 401 is fixed to the outer side wall of the tightening head 402. The tightening part 403 and the through-rod 404 are both provided on the lower surface of the tightening head 402.

Preferably, the tightening part 403 is a protrusion and/or a groove.

Preferably, the device further comprises a spacer 5. The washer 5 is disposed between the fastener 6 and the anti-loosening bolt 1. The gasket 5 is of an annular cylindrical structure. The gasket 5 is fixed on the fastening member 6, and the gasket 5 is provided with an anti-loosening insertion hole 501 for inserting the pin shaft 204.

Preferably, the fastening member 6 is provided with a fixing insertion hole 601 into which the pin 204 is inserted, and the fixing insertion hole 601 is vertically overlapped with the anti-loosening insertion hole 501.

Preferably, a protrusion-groove type anti-loosening combined structure is arranged between the nut 3 and the fastening piece 6.

Example 1

As shown in fig. 2, the hydraulic anti-loosening bolt 1 comprises a nut 101, a screw 102 and an external thread 103. The nut 101 is arranged on the screw 102. The external thread 103 is provided on the outer surface of the screw 102. The anti-loosening bolt 1 further comprises a through hole 104 and an accommodating cavity 105. The through hole 104 is opened in the upper surface of the nut 101. The receiving cavity 105 is formed in the lower surface of the nut 101. The bottom end of the through hole 104 is communicated with the top end of the accommodating cavity 105. The through hole 104 and the accommodating cavity 105 are both located in the nut 101 between the outer wall of the screw 102 and the outer wall of the nut 101. A hydraulic locking column system 2 is also arranged in the accommodating cavity 105.

Example 2

As shown in fig. 1, a hydraulic type anti-loose bolt and nut fastening device includes an anti-loose bolt 1 and a nut 3. The anti-loosening bolt 1 is assembled with the nut 3 through an external thread 103. The anti-loosening bolt 1 comprises a nut 101, a screw 102 and an external thread 103. The nut 101 is arranged on the screw 102. The external thread 103 is provided on the outer surface of the screw 102. The nut 3 includes a nut body 301, a threaded hole 302, and an internal thread 303. The threaded hole 302 is provided in the nut body 301. The internal thread 303 is provided on the inner wall of the threaded hole 302. The anti-loosening bolt 1 further comprises a through hole 104 and an accommodating cavity 105. The through hole 104 is opened in the upper surface of the nut 101. The receiving cavity 105 is formed in the lower surface of the nut 101. The bottom end of the through hole 104 is communicated with the top end of the accommodating cavity 105. The through hole 104 and the accommodating cavity 105 are both located in the nut 101 between the outer wall of the screw 102 and the outer wall of the nut 101. A hydraulic locking column system 2 is also arranged in the accommodating cavity 105.

Example 3

As shown in fig. 4, embodiment 2 is repeated except that the hydraulic check cylinder system 2 includes an outer housing 201, an inner housing 202, a pusher 203, a pin 204, and an elastic member 205. The inner shell 202 and the pusher 203 are both arranged in the inner cavity of the outer shell 201, and the pusher 203 is sleeved on the upper part of the inner shell 202. The pin 204 and the elastic element 205 are both disposed in the inner cavity of the inner housing 202, and the elastic element 205 is located above the top end of the pin 204.

Example 4

Example 3 was repeated except that the elastic member 205 was a spring.

Example 5

As shown in fig. 2-3, embodiment 4 is repeated except that the upper surface of the nut 101 is also provided with a tightening mechanism 106. The tightening mechanism 106 is a groove.

Example 6

As shown in fig. 5, embodiment 5 is repeated except that the outer casing 201 is a cylindrical structure with an open top end and a cavity inside. The bottom surface of the cavity of the outer shell 201 is provided with a shaft hole 20101.

Example 7

Example 6 is repeated except that the inner housing 202 has a cylindrical structure with an open bottom end and a hollow cavity therein. The top surface of the cavity of the inner shell 202 is provided with a vent hole 20201. The side wall of the bottom of the inner shell 202 is provided with a hydraulic oil hole 20202. The bottom end of the side wall of the inner shell 202 is fixedly arranged on the bottom surface of the outer shell 201, and the bottom end opening of the inner shell 202 completely surrounds the shaft hole 20101.

Example 8

As shown in fig. 6, only the pusher 203 includes a pushing rod 20301 and a pressing barrel 20302. The pressing barrel 20302 is a cylindrical structure with an open bottom end and a cavity inside. The push rod 20301 is disposed on the top surface of the pressure barrel 20302. An air flow hole 20303 is further formed on the top surface of the pressure barrel 20302. The pressing barrel 20302 is sleeved on the top end of the inner housing 202, and the barrel wall of the pressing barrel 20302 extends into the annular cylindrical cavity between the inner wall of the outer housing 201 and the outer wall of the inner housing 202 and can freely extend and retract in the annular cylindrical cavity.

Example 9

As shown in fig. 8, except that the pin 204 includes a cap 20401 and a shaft 20402. The shaft cap 20401 is located in the inner cavity of the inner shell 202, and the diameter of the shaft cap 20401 is larger than the caliber of the shaft hole 20101. The top end of the shaft 20402 is connected to a shaft cap 20401. The bottom end of the shaft rod 20402 extends into the shaft hole 20101. The cap 20401 is freely retractable in the inner cavity of the inner housing 202, and the shaft 20402 is freely retractable in the shaft hole 20101.

In the light of the above example 10,

as shown in fig. 4, the embodiment 9 is repeated, except that the bottom end of the barrel wall of the pressing barrel 20302, the inner wall of the outer housing 201, the inner bottom surface of the outer housing 201, and the outer wall of the inner housing 202 together form an outer hydraulic oil chamber a. The bottom surface of the shaft cap 20401, the inner wall of the inner shell 202, the inner bottom surface of the outer shell 201 and the outer wall of the shaft rod 20402 form a hydraulic oil inner chamber B. The hydraulic oil inner chamber B is communicated with the hydraulic oil outer chamber A through a hydraulic oil hole 20202. The bottom end of the barrel wall of the pressure barrel 20302, the end part of the side wall of the shaft cap 20401 and the upper end of the inner wall of the shaft hole 20101 are all provided with sealing elements 206.

Example 11

Example 10 is repeated except that the seal 206 is a sealing rubber.

Example 12

As shown in fig. 7, except that the device further comprises a tightening device 4. The tightening device 4 is provided at the upper end of the anti-loosening bolt 1. The tightening device 4 includes a handle 401, a tightening head 402, a tightening portion 403, and a through-rod 404. The tightening head is of a columnar structure. One end of the handle 401 is fixed to the outer side wall of the tightening head 402. The tightening part 403 and the through-rod 404 are both provided on the lower surface of the tightening head 402.

Example 13

Example 12 was repeated except that the tightening part 403 was a protrusion.

Example 14

Example 13 is repeated, as shown in fig. 10, except that the device further comprises a spacer 5. The washer 5 is disposed between the fastener 6 and the anti-loosening bolt 1. The gasket 5 is of an annular cylindrical structure. The gasket 5 is fixed on the fastening member 6, and the gasket 5 is provided with an anti-loosening insertion hole 501 for inserting the pin shaft 204.

Example 15

Embodiment 14 is repeated, except that the fastening member 6 is provided with a fixing insertion hole 601 into which the pin 204 is inserted, and the fixing insertion hole 601 is vertically overlapped with the anti-loosening insertion hole 501.

Example 16

Example 1 is repeated except that a protrusion-groove type anti-loosening combined structure is arranged between the nut 3 and the fastening piece 6.

Claims

1. A hydraulic anti-loosening bolt (1) comprises a nut (101), a screw (102) and an external thread (103); the screw cap (101) is arranged on the screw rod (102); the external thread (103) is arranged on the outer surface of the screw rod (102); the method is characterized in that: the anti-loosening bolt (1) further comprises a through hole (104) and an accommodating cavity (105); the through hole (104) is formed in the upper surface of the nut (101); the accommodating cavity (105) is formed in the lower surface of the nut (101); the bottom end of the through hole (104) is communicated with the top end of the accommodating cavity (105); the through hole (104) and the accommodating cavity (105) are both positioned in the screw cap (101) between the outer wall of the screw rod (102) and the outer wall of the screw cap (101); and a hydraulic anti-loosening column system (2) is also arranged in the accommodating cavity (105).

2. The utility model provides a locking bolt of moving of fluid pressure type, nut fastener which characterized in that: the device comprises an anti-loosening bolt (1) and a nut (3); the anti-loosening bolt (1) is assembled with the nut (3) through an external thread (103); the anti-loosening bolt (1) comprises a nut (101), a screw (102) and an external thread (103); the screw cap (101) is arranged on the screw rod (102); the external thread (103) is arranged on the outer surface of the screw rod (102); the nut (3) comprises a nut body (301), a threaded hole (302) and an internal thread (303); the threaded hole (302) is arranged on the nut main body (301); the internal thread (303) is arranged on the inner wall of the threaded hole (302); the anti-loosening bolt (1) further comprises a through hole (104) and an accommodating cavity (105); the through hole (104) is formed in the upper surface of the nut (101); the accommodating cavity (105) is formed in the lower surface of the nut (101); the bottom end of the through hole (104) is communicated with the top end of the accommodating cavity (105); the through hole (104) and the accommodating cavity (105) are both positioned in the screw cap (101) between the outer wall of the screw rod (102) and the outer wall of the screw cap (101); and a hydraulic anti-loosening column system (2) is also arranged in the accommodating cavity (105).

3. The hydraulic loosening prevention bolt and nut tightening device according to claim 1 or 2, wherein: the hydraulic anti-loosening column system (2) comprises an outer shell (201), an inner shell (202), a pushing device (203), a pin shaft (204) and an elastic piece (205); the inner shell (202) and the pushing device (203) are both arranged in the inner cavity of the outer shell (201), and the pushing device (203) is sleeved on the upper part of the inner shell (202); the pin shaft (204) and the elastic piece (205) are both arranged in the inner cavity of the inner shell (202), and the elastic piece (205) is positioned above the top end of the pin shaft (204);

preferably, the elastic element (205) is one of a spring, a spring piece and an elastic colloid;

preferably, the upper surface of the nut (101) is further provided with a tightening mechanism (106); the tightening mechanism (106) is a protrusion and/or a groove.

4. The hydraulic loosening prevention bolt and nut tightening device according to claim 3, wherein: the outer shell (201) is a cylindrical structure with an opening at the top end and a cavity inside; the bottom surface of the cavity of the outer shell (201) is provided with a shaft hole (20101).

5. The hydraulic loosening prevention bolt and nut tightening device according to claim 3 or 4, wherein: the inner shell (202) is of a cylindrical structure with an opening at the bottom end and a cavity inside; a vent hole (20201) is formed in the top surface of the cavity of the inner shell (202); a hydraulic oil hole (20202) is formed in the side wall of the bottom of the inner shell (202); the bottom end of the side wall of the inner shell (202) is fixedly arranged on the bottom surface of the outer shell (201), and the bottom end opening of the inner shell (202) completely surrounds the shaft hole (20101).

6. The hydraulic loosening-prevention bolt and nut tightening device according to any one of claims 3 to 5, wherein: the pushing device (203) comprises a pushing rod (20301) and a pressing barrel (20302); the pressing barrel (20302) is of a cylindrical structure with an opening at the bottom end and a cavity inside; the push rod (20301) is arranged on the top surface of the pressure barrel (20302); an airflow hole (20303) is also formed in the top surface of the pressing barrel (20302); the top of interior casing (202) is established to pressure bucket (20302) cover, just the bucket wall of pressing bucket (20302) stretches into the annular column cavity between shell body (201) inner wall and interior casing (202) outer wall in to can freely stretch out and draw back in this annular column cavity.

7. The hydraulic loosening prevention bolt and nut tightening device according to claim 5 or 6, wherein: the pin shaft (204) comprises a shaft cap (20401) and a shaft rod (20402); the shaft cap (20401) is positioned in the inner cavity of the inner shell (202), and the diameter of the shaft cap (20401) is larger than the caliber of the shaft hole (20101); the top end of the shaft rod (20402) is connected with a shaft cap (20401); the bottom end of the shaft rod (20402) extends into the shaft hole (20101); the shaft cap (20401) can freely stretch out and draw back in the inner cavity of the inner shell (202), and the shaft rod (20402) can freely stretch out and draw back in the shaft hole (20101).

8. The hydraulic loosening prevention bolt and nut tightening device according to claim 7, wherein: a hydraulic oil outer cavity (A) is formed among the bottom end of the barrel wall of the pressure barrel (20302), the inner wall of the outer shell (201), the inner bottom surface of the outer shell (201) and the outer wall of the inner shell (202); a hydraulic oil inner chamber (B) is formed among the bottom surface of the shaft cap (20401), the inner wall of the inner shell (202), the inner bottom surface of the outer shell (201) and the outer wall of the shaft rod (20402); the hydraulic oil inner chamber (B) is communicated with the hydraulic oil outer chamber (A) through a hydraulic oil hole (20202); sealing elements (206) are arranged at the bottom end of the barrel wall of the pressing barrel (20302), the end part of the side wall of the shaft cap (20401) and the upper end of the inner wall of the shaft hole (20101);

preferably, the sealing member (206) is a sealing rubber.

9. The hydraulic loosening-prevention bolt and nut tightening device according to any one of claims 3 to 8, wherein: the device also comprises a tightening device (4); the tightening device (4) is arranged at the upper end of the anti-loosening bolt (1); the tightening device (4) comprises a handle (401), a tightening head (402), a tightening part (403) and a through rod (404); the tightening head is of a columnar structure; one end of the handle (401) is fixed on the outer side wall of the tightening head (402); the tightening part (403) and the through rod (404) are arranged on the lower surface of the tightening head (402);

preferably, the tightening part (403) is a protrusion and/or a groove.

10. The hydraulic loosening prevention bolt and nut tightening device according to claim 9, wherein: the device further comprises a gasket (5); the gasket (5) is arranged between the fastener (6) and the anti-loosening bolt (1); the gasket (5) is of an annular columnar structure; the gasket (5) is fixed on the fastener (6), and an anti-loosening jack (501) for inserting the pin shaft (204) is formed in the gasket (5);

preferably, a fixing insertion hole (601) for inserting the pin shaft (204) is formed in the fastener (6), and the fixing insertion hole (601) is overlapped with the anti-loosening insertion hole (501) in the vertical direction;

preferably, a protrusion-groove type anti-loosening combined structure is arranged between the nut (3) and the fastening piece (6).