CN214698691U

CN214698691U - Tension adjusting bolt

Info

Publication number: CN214698691U
Application number: CN202023268930.5U
Authority: CN
Inventors: 刘春梅
Original assignee: Suzhou Senqi Molding Technology Co ltd
Current assignee: Suzhou Senqi Molding Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-11-12
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a pulling force adjusting bolt, concretely relates to bolt field, including the pulling force valve barrel, the one end fixedly connected with of pulling force valve barrel decides the screw thread end, and the inside slip of pulling force valve barrel has cup jointed pulling force valve rod assembly, and pulling force valve rod assembly's tip fixedly connected with moves the screw thread end, and the outside fixed mounting of pulling force valve barrel has hydraulic pressure survey mechanism, choke valve, flowing back port and one-way filling port, and pulling force display mechanism is installed in the surface embedding of pulling force valve barrel, and the outside threaded connection of flowing back port and one-way filling port has the end cover of sealing. Above-mentioned scheme, this tension adjusting bolt adopts fluid pressure type tensile structure, and the sliding motion through pulling force valve rod subassembly in the pulling force valve barrel is inside at hydraulic fluid or damping fluid formation negative pressure and is offset the pulling force to realize the tensile function, and through the filling and the discharge of hydraulic fluid or damping fluid, utilize the volume change of liquid to realize this tension bolt's tension adjustment, adjust simple and conveniently, can carry out online adjustment.

Description

Tension adjusting bolt

Technical Field

The utility model relates to a bolt technical field, more specifically says, the utility model specifically is a tension adjusting bolt.

Background

With the improvement of living standard and the improvement of science and technology of people, mechanical equipment is rapidly developed, particularly on vehicles for traveling, and generally tension adjusting bolts are arranged on vehicles such as automobiles and trains.

In a patent with a Chinese patent publication No. CN209340302U, a tension adjusting bolt is disclosed, which comprises an upper bolt and a lower bolt, wherein the upper part of the upper bolt and the lower part of the lower bolt are provided with connecting threads, one side of each connecting thread is provided with a limit ring, one end of the lower bolt, which is close to the upper bolt, is provided with a sliding blind hole, the end is fixedly connected with a fixing ring sleeved on the periphery of the upper bolt, one side of the fixing ring is provided with a first magnet, and two sides of the first magnet are provided with second fixing grooves; go up the lower part of bolt and be equipped with the polygon through-hole, lower bolt periphery is equipped with fixed lid, one side that the bolt is close to fixed lid is equipped with the through-going stroke through-hole to the blind hole that slides, adopt the card to put the piece and the cooperation of card breach of putting and carry out the tension adjustment in this scheme, adjust and need pull down the card and put the piece and pull in again excessively, can't carry out on-line adjustment, in addition, traditional tension adjusting bolt does not have any buffer part at tensile in-process, the tensile of violent change easily leads to adjusting bolt's distortion, damage the bolt, lead to life to reduce, there is certain defect.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a tension adjusting bolt, through the sliding motion of tension valve rod subassembly in tension valve cover inside at hydraulic liquid or the inside negative pressure that forms of damping fluid offset the pulling force to realize the tensile function, and through the filling and the discharge of hydraulic liquid or damping fluid, utilize the volume change of liquid to realize this tension adjusting bolt's tension to solve the problem that proposes in the above-mentioned background art.

In order to achieve the purpose, the utility model provides a technical scheme, a tension adjusting bolt, including the tension valve barrel, the one end fixedly connected with fixed thread end of tension valve barrel, the inside slip of tension valve barrel has cup jointed the tension valve rod subassembly, the tip fixedly connected with of tension valve rod subassembly moves the thread end, the outside fixed mounting of tension valve barrel has hydraulic pressure survey mechanism, choke valve, flowing back port and one-way filling port, the surface embedding of tension valve barrel is installed with the tension display mechanism, the outside threaded connection of flowing back port and one-way filling port has the sealed end cover;

the tension valve rod assembly comprises a movement pull rod and a movement piston, two ends of the movement pull rod are fixedly connected with the tension valve rod assembly and one side of the movement piston respectively, the movement piston is installed inside the tension valve sleeve in a sliding mode, a compressed air cavity and a resistance liquid cavity which are located inside the tension valve sleeve are arranged on two sides of the movement piston respectively, the end portion of the air check valve is communicated with an inner cavity of the compressed air cavity, and the end portion of the hydraulic measuring mechanism is located inside the resistance liquid cavity.

Preferably, the tension valve sleeve and the fixed thread end are of an integrated casting structure, the movable thread end and the tension valve rod assembly are of an integrated casting structure, and the tension valve sleeve, the fixed thread end, the movable thread end and the tension valve rod assembly are made of ball-milling cast iron.

Preferably, a mechanical seal is arranged at the joint of the movement pull rod and the tension valve sleeve, the mechanical seal is movably sleeved on the surface of the movement pull rod, a groove is formed in the outer side of the movement piston, a piston ring is fixedly sleeved on the outer side of the movement piston, and the outer side of the piston ring is in interference fit with the inner wall of the tension valve sleeve.

Preferably, hydraulic oil or damping fluid is filled in the resistance liquid cavity, the end parts of the liquid discharge port and the one-way filling port are communicated with the inner cavity of the resistance liquid cavity, and the liquid discharge port is of a through port structure.

Preferably, the one-way filling port comprises a port body and two elastic valve plates, the two ends of the port body are respectively provided with a filling port and a communicating hole, the two elastic valve plates are symmetrically arranged in the port body, and the two elastic valve plates are mutually abutted.

Preferably, the elastic valve plate is of an elastic metal or rubber valve plate structure, and the number of the communication holes is two and is blended with the two sides of the center line of the elastic valve plate.

Preferably, the hydraulic pressure measuring mechanism is of a hydraulic sensor structure, the tension display mechanism is of a digital display structure, and the output end of the hydraulic pressure measuring mechanism is electrically connected with the input end of the tension display mechanism.

The utility model discloses a technological effect and advantage:

1. in the scheme, the tension adjusting bolt adopts a hydraulic tensile structure, negative pressure is formed in hydraulic liquid or damping liquid through the sliding motion of the tension valve rod assembly in the tension valve sleeve to offset tension, so that the tension function is realized, the tension adjusting of the tension adjusting bolt is realized by using the volume change of liquid through the filling and discharging of the hydraulic liquid or the damping liquid, the adjustment is simple and convenient, and online adjustment can be carried out;

2. in the scheme, the tension adjusting bolt adopts the sealed compressed air cavity to store air pressure and slowly discharges the air pressure through the air blocking valve, so that the slow motion of the end part of the movable thread end and the end part of the tension valve rod assembly in tension is realized, the damage to the tension bolt caused by the rapid change of tension is avoided, and the service life of the tension bolt is prolonged.

Drawings

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

fig. 2 is a schematic view of the internal structure of the tension valve sleeve of the present invention;

fig. 3 is a schematic structural diagram of the utility model at a in fig. 2;

fig. 4 is a schematic view of the structure of the one-way filling port of the present invention.

The reference signs are:

1. a pull valve sleeve; 2. fixing a threaded end; 3. a movable thread end; 4. a tension valve stem assembly; 5. a tension display mechanism; 6. a hydraulic pressure measuring mechanism; 7. a choke valve; 8. a liquid discharge port; 9. a one-way fill port; 10. a compressed air cavity; 11. a resistance fluid chamber; 12. sealing the end cap; 41. a motion pull rod; 42. a moving piston; 91. a port body; 92. a filling port; 93. a communicating hole; 94. an elastic valve plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model provides a tension adjusting bolt as shown in fig. 1 to fig. 4, which comprises a tension valve sleeve 1, wherein one end of the tension valve sleeve 1 is fixedly connected with a fixed thread end 2, a tension valve rod component 4 is sleeved in the tension valve sleeve 1 in a sliding manner, the end of the tension valve rod component 4 is fixedly connected with a movable thread end 3, a hydraulic measuring mechanism 6, a choke valve 7, a drainage port 8 and a one-way filling port 9 are fixedly installed at the outer side of the tension valve sleeve 1, a tension display mechanism 5 is embedded in the surface of the tension valve sleeve 1, and the outer threads of the drainage port 8 and the one-way filling port 9 are connected with a sealing end cover 12;

the pull valve rod assembly 4 comprises a moving pull rod 41 and a moving piston 42, two ends of the moving pull rod 41 are fixedly connected with one side of the pull valve rod assembly 4 and one side of the moving piston 42 respectively, the moving piston 42 is slidably mounted inside the pull valve sleeve 1, two sides of the moving piston 42 are provided with a compressed air cavity 10 and a resistance liquid cavity 11 which are located inside the pull valve sleeve 1 respectively, the end part of the choke valve 7 is communicated with the inner cavity of the compressed air cavity 10, the end part of the hydraulic pressure measuring mechanism 6 is located inside the resistance liquid cavity 11, hydraulic oil or damping liquid is filled inside the resistance liquid cavity 11, the end parts of the liquid discharge port 8 and the one-way filling port 9 are communicated with the inner cavity of the resistance liquid cavity 11, and the liquid discharge port 8 is of a through port structure.

In this embodiment, the tension valve sleeve 1 and the fixed thread end 2 are of an integral casting structure, the movable thread end 3 and the tension valve rod assembly 4 are of an integral casting structure, and the tension valve sleeve 1, the fixed thread end 2, the movable thread end 3 and the tension valve rod assembly 4 are of ball-milled cast iron components, so that the structural strength of the tension bolt is improved.

In this embodiment, a mechanical seal is disposed at a connection position of the moving pull rod 41 and the pulling force valve sleeve 1, the mechanical seal is movably sleeved on the surface of the moving pull rod 41, a groove is formed on the outer side of the moving piston 42, a piston ring is fixedly sleeved on the outer side of the moving piston, and the outer side of the piston ring is in interference fit with the inner wall of the pulling force valve sleeve 1, so that the sealing of the pulling force valve sleeve 1 is realized, and the pulling force is offset through negative pressure.

In this embodiment, the one-way filling port 9 includes a port body 91 and two elastic valve plates 94, two ends of the port body 91 are respectively provided with a filling port 92 and a communication hole 93, the two elastic valve plates 94 are symmetrically arranged inside the port body 91, the two elastic valve plates 94 are mutually abutted, the elastic valve plates 94 are of an elastic metal or rubber valve plate structure, and the two communication holes 93 are arranged on two sides of a central line of the elastic valve plates 94.

Specifically, the liquid is filled in one direction through the filling port 92, and when the liquid flows back, the two elastic valve sheets 94 abut against each other to prevent the liquid from reversely flowing out.

In this embodiment, the hydraulic pressure measuring mechanism 6 is a hydraulic pressure sensor structure, the tension display mechanism 5 is a digital display structure, the output end of the hydraulic pressure measuring mechanism 6 is electrically connected with the input end of the tension display mechanism 5, and the hydraulic pressure sensor and the digital display are in the prior art and used for real-time monitoring and displaying of tension action.

The working process of the utility model is as follows:

when the tension adjusting bolt is used, a workpiece is connected through a fixed thread end 2 and a movable thread end 3, a proper amount of damping fluid or hydraulic oil is filled into the tension valve sleeve 1 through a one-way filling port 9, the liquid drainage port 8 and the one-way filling port 9 are sealed through a sealing end cover 12, the tension adjusting bolt can be used, the negative pressure of the oil in the tension valve sleeve 1 is monitored in real time through a hydraulic measuring mechanism 6 after the tension adjusting bolt is stressed, signals are transmitted to a tension display mechanism 5, and the tension effect is monitored and displayed in real time;

when tension adjustment is needed, only the tension valve rod assembly 4 needs to be fixed, the sealing end cover 12 at the end part of the one-way filling port 9 is opened, oil is filled into the tension valve sleeve 1 or the sealing end cover 12 at the end part of the liquid discharging port 8 is opened to extrude and discharge the oil in the tension valve sleeve 1, the tension adjustment of the tension bolt can be realized by utilizing the volume change of liquid, and in the process of tension action of the fixed thread end 2, air pressure in the compressed air cavity 10 is slowly discharged through the air choke valve 7, so that the slow motion of tension of the movable thread end 3 and the end part of the tension valve rod assembly 4 is realized.

According to the scheme, the tension adjusting bolt is of a hydraulic tensile structure, negative pressure is formed in hydraulic liquid or damping liquid through sliding motion of the tension valve rod assembly 4 in the tension valve sleeve 1 to offset tension, so that the tensile function is achieved, the tension adjusting of the tension adjusting bolt is achieved by volume change of liquid through filling and discharging of the hydraulic liquid or the damping liquid, the adjustment is simple and convenient, and online adjustment can be achieved; in addition, the tension adjusting bolt adopts the sealed compressed air cavity 10 to store air pressure and discharges the air pressure slowly through the choke valve 7, so that the slow motion of the end part of the movable thread end head 3 and the tension valve rod assembly 4 is realized, the damage to the tension bolt caused by the rapid change of tension is avoided, and the service life of the tension bolt is prolonged.

Finally, it should be noted that, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed;

secondly, in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to common designs, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

finally, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tension adjusting bolt comprises a tension valve sleeve (1), wherein one end of the tension valve sleeve (1) is fixedly connected with a fixed thread end (2), and the tension adjusting bolt is characterized in that a tension valve rod assembly (4) is sleeved in the tension valve sleeve (1) in a sliding mode, the end of the tension valve rod assembly (4) is fixedly connected with a movable thread end (3), a hydraulic measuring mechanism (6), a choke valve (7), a liquid discharge port (8) and a one-way filling port (9) are fixedly installed on the outer side of the tension valve sleeve (1), a tension display mechanism (5) is embedded in the surface of the tension valve sleeve (1), and the outer threads of the liquid discharge port (8) and the one-way filling port (9) are connected with a sealing end cover (12);

the valve rod assembly (4) comprises a moving pull rod (41) and a moving piston (42), two ends of the moving pull rod (41) are fixedly connected with one sides of the valve rod assembly (4) and the moving piston (42) respectively, the moving piston (42) is installed inside the tension valve sleeve (1) in a sliding mode, a compressed air cavity (10) and a resistance liquid cavity (11) which are located inside the tension valve sleeve (1) are arranged on two sides of the moving piston (42) respectively, the end portion of the choke valve (7) is communicated with an inner cavity of the compressed air cavity (10), and the end portion of the hydraulic pressure measuring mechanism (6) is located inside the resistance liquid cavity (11).

2. The tension adjusting bolt as claimed in claim 1, wherein the tension valve sleeve (1) and the fixed thread end (2) are of an integrally cast structure, the movable thread end (3) and the tension valve rod assembly (4) are of an integrally cast structure, and the tension valve sleeve (1), the fixed thread end (2), the movable thread end (3) and the tension valve rod assembly (4) are of a ball-milled cast iron material component.

3. The tension adjusting bolt as recited in claim 1, characterized in that a mechanical seal is arranged at the joint of the moving pull rod (41) and the tension valve sleeve (1), the mechanical seal is movably sleeved on the surface of the moving pull rod (41), a groove is arranged on the outer side of the moving piston (42) and a piston ring is fixedly sleeved on the outer side of the moving piston, and the outer side of the piston ring is in interference fit with the inner wall of the tension valve sleeve (1).

4. The tension adjusting bolt according to claim 1, characterized in that the interior of the resistance liquid cavity (11) is filled with hydraulic oil or damping liquid, the ends of the liquid discharge port (8) and the one-way filling port (9) are communicated with the inner cavity of the resistance liquid cavity (11), and the liquid discharge port (8) is of a through port structure.

5. The tension adjusting bolt as recited in claim 1, wherein the one-way filling port (9) comprises a port body (91) and elastic valve plates (94), two ends of the port body (91) are respectively provided with a filling port (92) and a communication hole (93), the number of the elastic valve plates (94) is two, the elastic valve plates are symmetrically arranged in the port body (91), and the two elastic valve plates (94) are mutually abutted.

6. The tension adjusting bolt according to claim 5, wherein the elastic valve plate (94) is of an elastic metal or rubber valve plate structure, and the number of the communication holes (93) is two and is blended to be arranged at two sides of the center line of the elastic valve plate (94).

7. The tension adjusting bolt according to claim 1, characterized in that the hydraulic measuring mechanism (6) is of a hydraulic sensor structure, the tension display mechanism (5) is of a digital display structure, and the output end of the hydraulic measuring mechanism (6) is electrically connected with the input end of the tension display mechanism (5).