CN211144987U

CN211144987U - Piston rod safety device with automatic locking function

Info

Publication number: CN211144987U
Application number: CN201921795747.5U
Authority: CN
Inventors: 张勇; 王荣; 毛晓珺; 杨向天
Original assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Current assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-07-31
Anticipated expiration: 2029-10-23

Abstract

The utility model belongs to the technical field of piston rods, in particular to a piston rod safety device with an automatic locking function, which comprises a piston rod, a slide rod arranged on the piston rod and a lock nut used for fixing the slide rod, wherein a piston post is integrally formed at one end of the piston rod, a piston is sleeved on the outer surface of the piston post, a guiding device is arranged outside the piston, and an external thread is arranged on the outer surface of one end of the piston post, which is far away from the piston rod; exert the slide bar of pressure through the setting to lock nut, pull out the back with the slide bar, rotate the slide bar along lock nut rotation direction's opposite direction, then go into the draw-in groove with card strip card, the strength of torsional spring shrink can be with the slide bar to pulling in the torsional spring storehouse, restriction card strip can not pop out simultaneously, because the effort that the torsional spring of slide bar bottom resets can drive the slide bar and continue to rotate the effort of applying the locking to lock nut, thereby automatic locking has been reached, prevent for a long time that lock nut from taking place not hard up effect.

Description

Piston rod safety device with automatic locking function

Technical Field

The utility model relates to a piston rod technical field especially relates to a piston rod safeties with automatic locking function.

Background

The piston is mainly used in an automobile engine or an oil cylinder, the piston is often fixed on a piston rod, the piston rod reciprocates to drive the piston to move, and the piston is required to be locked by a locking device such as a bolt after being sleeved on the piston rod, so that looseness between the piston and the piston rod is prevented.

Many locking devices for locking a piston on a piston rod are prone to loosening during use of the piston.

In order to solve the above problems, a safety device for a piston rod with an automatic locking function is proposed in the present application.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

For solving the technical problem who exists among the background art, the utility model provides a piston rod safeties with automatic locking function has the not hard up characteristics of locking device that prevent.

(II) technical scheme

In order to solve the above problems, the utility model provides a piston rod safety device with automatic locking function, which comprises a piston rod, a slide rod arranged on the piston rod and a lock nut used for fixing the slide rod;

a piston column is integrally formed at one end of the piston rod, a piston is sleeved on the outer surface of the piston column, a guide device is installed on the outer side of the piston, external threads are formed on the outer surface of one end, away from the piston rod, of the piston column, a torsion spring bin is formed in the piston column, a through hole is formed in one end, away from the piston rod, of the piston column, and the through hole penetrates into the torsion spring bin;

a sliding rod is connected in the through hole in the piston rod in a sliding manner, one end of the sliding rod extends into the torsion spring bin, a torsion spring is fixedly connected in the torsion spring bin, one end of the torsion spring is fixedly connected with the sliding rod, a groove is formed in the outer side of the sliding rod, which is far away from one end of the piston rod, a clamping strip is rotatably connected in the groove through a rotating shaft, and a gasket is fixedly connected at one end of the sliding rod, which is far away from the piston rod;

a thread groove is formed in one end, close to the piston rod, of the locking nut, the locking nut is in threaded connection with the piston column, a round hole is formed in one end, far away from the piston rod, of the locking nut, the round hole penetrates through the thread groove from one end of the locking nut, and a clamping groove is formed in the position, close to the outer side of the round hole, of one end of the locking nut;

the slide bar runs through the round hole, just the card strip is located in the draw-in groove, the card strip with lock nut block is connected.

Preferably, the number of the clamping strips is two, the clamping strips are arranged on the outer sides of the sliding rods, and an included angle formed between the sliding rods when the clamping strips are unfolded is sixty degrees.

Preferably, the number of the clamping grooves is two, and the two clamping grooves are formed in the locking nut.

Preferably, the diameter of the through hole is smaller than that of the torsion spring.

Preferably, the gasket is sheet-shaped, and a semicircular hole is formed in the gasket.

Preferably, the clamping strip is matched with the groove, and when the clamping strip is closed, the section of the sliding rod is circular.

The above technical scheme of the utility model has following profitable technological effect:

exert the slide bar of pressure through the setting to lock nut, pull out the back with the slide bar, rotate the slide bar along lock nut rotation direction's opposite direction, then go into the draw-in groove with card strip card, the strength of torsional spring shrink can be with the slide bar to pulling in the torsional spring storehouse, restriction card strip can not pop out simultaneously, because the effort that the torsional spring of slide bar bottom resets can drive the slide bar and continue to rotate the effort of applying the locking to lock nut, thereby automatic locking has been reached, prevent for a long time that lock nut from taking place not hard up effect.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the engagement between the locking strip and the slot of the present invention;

FIG. 3 is a schematic structural view of the sliding rod of the present invention;

fig. 4 is a schematic structural diagram of one side of the middle slot of the present invention.

Fig. 5 is a schematic structural diagram of the other side of the middle thread groove of the present invention.

Reference numerals:

1. a piston rod; 11. a piston post; 12. a piston; 13. a guide device; 14. a torsion spring bin; 2. a slide bar; 21. a torsion spring; 22. a groove; 23. clamping the strip; 24. a gasket; 3. a lock nut; 31. a thread groove; 32. a circular hole; 33. a clamping groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1-5, the safety device with automatic locking function for piston rod of the present invention comprises a piston rod 1, a sliding rod 2 mounted on the piston rod 1, and a lock nut 3 for fixing the sliding rod 2;

a piston post 11 is integrally formed at one end of the piston rod 1, a piston 12 is sleeved on the outer surface of the piston post 11, a guide device 13 is installed on the outer side of the piston 12, external threads are formed on the outer surface of one end, away from the piston rod 1, of the piston post 11, a torsion spring bin 14 is formed inside the piston post 11, a through hole is formed in one end, away from the piston rod 1, of the piston post 11, and the through hole penetrates into the torsion spring bin 14;

a sliding rod 2 is connected in a through hole in the piston rod 1 in a sliding manner, one end of the sliding rod 2 extends into the torsion spring bin 14, a torsion spring 21 is fixedly connected in the torsion spring bin 14, one end of the torsion spring 21 is fixedly connected with the sliding rod 2, a groove 22 is formed in the outer side of the sliding rod 2, which is far away from one end of the piston rod 1, a clamping strip 23 is rotatably connected in the groove 22 through a rotating shaft, and a gasket 24 is fixedly connected at one end of the sliding rod 2, which is;

a thread groove 31 is formed in one end, close to the piston rod 1, of the locking nut 3, the locking nut 3 is in threaded connection with the piston column 11, a round hole 32 is formed in one end, far away from the piston rod 1, of the locking nut 3, the round hole 32 penetrates through the thread groove 31 from one end of the locking nut 3, and a clamping groove 33 is formed in the position, close to the outer side of the round hole 32, of one end of the locking nut 3;

the sliding rod 2 penetrates through the round hole 32, the clamping strip 23 is located in the clamping groove 33, and the clamping strip 23 is connected with the locking nut 3 in a clamping mode.

In the utility model, when installing the piston 12, firstly, the piston 12 is sleeved on the piston post 11, the lock nut 3 is installed at one end of the piston post 11, the piston 12 is locked, after the lock nut 3 is rotated to lock the piston 12, the worker can pull out the slide bar 2 by using the hook to enable the slide bar 2 to run through the round hole 32, then the clamping strip 23 is unfolded to enable the forehead clamping strip 23 to be clamped into the clamping groove 33 to fix the lock nut 3, when the lock nut 3 is loosened, the slide bar 2 can limit the rotation of the slide bar 2 due to the fixation and limitation of the torsional spring 21 at the bottom, thereby achieving the purpose of preventing the lock nut 3 from being loosened, and after the slide bar 2 is pulled out, the slide bar 2 is rotated along the direction opposite to the rotation direction of the lock nut 3, then the clamping strip 23 is clamped into the clamping groove 33, the force of the torsional spring 21 can pull the slide bar 2 into the torsional spring bin 14, meanwhile, the limiting clamping strip 23 cannot pop up, and the reset acting force of the torsion spring 21 at the bottom of the slide rod 2 can drive the slide rod 2 to continue rotating to apply a locking acting force on the locking nut 3, so that automatic locking is achieved, and the locking nut 3 is prevented from loosening for a long time.

Preferably, the number of the clamping strips 23 is two, the two clamping strips 23 are both arranged on the outer side of the sliding rod 2, and an included angle between the clamping strips 23 and the sliding rod 2 when the clamping strips 23 are unfolded is sixty degrees.

It should be noted that, when the card strip 23 is unfolded and an included angle of sixty degrees is formed between the card strip 23 and the sliding rod 2, the card strip 23 cannot be unfolded any more, and when the card strip 23 is clamped into the clamping groove 33, the restoring force of the torsion spring 21 pulls the sliding rod 2 to move towards the torsion spring bin 14, so as to lock the lock nut 3.

Preferably, the number of the slots 33 is two, and the two slots 33 are both provided on the lock nut 3.

It should be noted that, by arranging the two clamping grooves 33, the two clamping grooves 33 can fix the two clamping strips 23, so that the clamping strips 23 rotate by the same force as that of one person who screws the locking nut 3 all the time, and the locking nut 3 cannot be loosened.

Preferably, the diameter of the through hole is smaller than the diameter of the torsion spring 21.

It should be noted that, during the process of pulling the sliding rod 2, the torsion spring 21 will not pass through the through hole when extending to the through hole, but will be stuck in the torsion spring chamber 14.

Preferably, the gasket 24 is sheet-shaped, and a semicircular hole is opened on the gasket 24.

It should be noted that, by arranging the gasket 24 on the sliding rod 2, a worker can use a pair of pliers to clamp the gasket 24, so as to rotate the gasket 24 and drive the sliding rod 2 to rotate.

Preferably, the clamping strip 23 is matched with the groove 22, and when the clamping strip 23 is closed, the cross section of the sliding rod 2 is circular.

It should be noted that when the clamping strip 23 is closed in the groove 22, the surface of the sliding rod 2 is smooth and can be retracted in the through hole.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A piston rod safety device with an automatic locking function is characterized by comprising a piston rod (1), a sliding rod (2) arranged on the piston rod (1) and a locking nut (3) used for fixing the sliding rod (2);

one end of the piston rod (1) is integrally formed with a piston column (11), a piston (12) is sleeved on the outer surface of the piston column (11), a guide device (13) is installed on the outer side of the piston (12), an external thread is formed on the outer surface of one end, away from the piston rod (1), of the piston column (11), a torsion spring bin (14) is formed inside the piston column (11), a through hole is formed in one end, away from the piston rod (1), of the piston column (11), and the through hole penetrates into the torsion spring bin (14);

a sliding rod (2) is connected in a through hole in the piston rod (1) in a sliding manner, one end of the sliding rod (2) extends into the torsion spring bin (14), a torsion spring (21) is fixedly connected in the torsion spring bin (14), one end of the torsion spring (21) is fixedly connected with the sliding rod (2), a groove (22) is formed in the outer side of one end, away from the piston rod (1), of the sliding rod (2), a clamping strip (23) is rotatably connected in the groove (22) through a rotating shaft, and a gasket (24) is fixedly connected at one end, away from the piston rod (1), of the sliding rod (2);

a thread groove (31) is formed in one end, close to the piston rod (1), of the locking nut (3), the locking nut (3) is in threaded connection with the piston column (11), a round hole (32) is formed in one end, far away from the piston rod (1), of the locking nut (3), the round hole (32) penetrates through the thread groove (31) from one end of the locking nut (3), and a clamping groove (33) is formed in the position, close to the outer side of the round hole (32), of one end of the locking nut (3);

the sliding rod (2) penetrates through the round hole (32), the clamping strip (23) is located in the clamping groove (33), and the clamping strip (23) is connected with the locking nut (3) in a clamping mode.

2. The piston rod safety device with automatic locking function according to claim 1, characterized in that the number of the clamping strips (23) is two, and the two clamping strips (23) are both arranged at the outer side of the sliding rod (2), and the included angle between the clamping strips (23) and the sliding rod (2) when the clamping strips (23) are unfolded is sixty degrees.

3. The piston rod safety device with automatic locking function according to claim 1, characterized in that the number of said locking grooves (33) is two, and both said locking grooves (33) are provided on said lock nut (3).

4. Piston rod safety with automatic locking according to claim 1 characterized in that the diameter of the through hole is smaller than the diameter of the torsion spring (21).

5. The piston rod safety device with automatic locking function as claimed in claim 1, characterized in that the washer (24) is in the shape of a sheet, and a semicircular hole is opened on the washer (24).

6. The piston rod safety device with automatic locking function according to claim 1, characterized in that the clip strip (23) is matched with the groove (22), and when the clip strip (23) is closed, the cross section of the sliding rod (2) is circular.