CN214788502U - Bolt for assembling and connecting piston and piston rod - Google Patents

Abstract

The utility model discloses a bolt for piston and piston rod assembly connection, which belongs to the technical field of fasteners and comprises a bolt body, wherein the bolt body is a countersunk bolt and comprises a screw rod and a head part; the outer circular surface of the head part is provided with a chute; the chute is arranged on the axial surface vertical to the screw rod, and the rotation direction of the chute is opposite to that of the screw rod; the number of the inclined grooves is at least 2, and the inclined grooves are uniformly arranged in a circular array on the outer circular surface of the head. Compared with the prior art, the problem that the bolt for connecting and fixing the piston on the piston rod falls off under the action of factors such as vibration and the like due to long-time work of the existing compression mechanism is effectively solved, and the compression mechanism has the characteristic of prolonging the service life of the compression mechanism.

Description

Bolt for assembling and connecting piston and piston rod

Technical Field

The utility model relates to a fastener technical field especially belongs to a bolt that is used for piston and piston rod be assembled between/be connected between.

Background

The existing compression mechanism works for a long time, the existing compression mechanism is used for connecting and fixing a piston with a fixing bolt on a piston rod, the phenomenon of looseness or even falling is easy to occur under the action of factors such as vibration and the like, the piston can fall off from one end of the piston rod due to the phenomenon, and the falling piston is extremely seriously damaged by impact, friction and the like on a compressor due to the impact of the piston rod in the working process of the compression mechanism, so that the normal work of the compression mechanism is influenced.

Disclosure of Invention

An object of the utility model is to provide a bolt that is used for piston and piston rod be assembled between/be connected between, reach and solve compressing mechanism and because of long-time work, lead to its fixing bolt who is used for fixing the piston connection on the piston rod to receive the problem that takes place to drop under the effect of factors such as vibration to realize improving compressing mechanism working life's purpose.

The utility model provides a bolt for piston and piston rod assembly connection, including the bolt body, the bolt body includes screw rod and head, its characterized in that, the outer disc of head is the toper surface, and the diameter that the head kept away from the screw rod one end is less than the diameter that the head is close to the screw rod one end; the outer circular surface of the head part is provided with a chute; the inclined groove is arranged on the axial surface vertical to the screw rod, and the rotation direction of the inclined groove is opposite to that of the screw rod.

Furthermore, the number of the inclined grooves is at least 2, and the inclined grooves are uniformly arranged in an annular row in the full circumferential range of the outer circular surface of the head.

Further, the bolt body is a countersunk bolt.

The utility model provides a bolt for piston and piston rod be assembled between/be connected between, in the compressing mechanism working process, the piston receives the piston rod to promote the extrusion raw materials, the positive pressure that the piston receives acts on the chute and produces the component force this moment, the component force of a plurality of chutes forms the moment of torsion, the effect of this moment of torsion makes the screw rod screw, thereby realize that the bolt body forms auto-lock effect in the compressing mechanism working process, effectively solved current compressing mechanism because of long-time work, lead to its bolt that is used for fixing the piston connection on the piston rod to receive the problem that comes off under the effect of factors such as vibration, the working life of compressing mechanism is improved.

Drawings

The accompanying drawings partially disclose embodiments of the present invention, in which,

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

fig. 2 is a front view of the present invention;

FIG. 3 is a schematic view of the force analysis of the present invention, which is drawn from FIG. 2;

fig. 4 is a right side view of the present invention;

fig. 5 is a schematic view of the application assembly of the present invention;

fig. 6 is a right side view of the present invention drawn from fig. 5.

Detailed Description

The utility model provides a bolt for piston and piston rod be assembled between/be connected is applied to the compressing mechanism of dry ice granulation machine, fixes piston connection on the piston rod for the compression shaping operation of dry ice. The bolt comprises a bolt body 1, as shown in fig. 1, 2 and 4, the bolt body 1 is a countersunk head bolt, the bolt body 1 comprises a screw 101 and a head 102, the outer circular surface of the head 102 is a conical surface, that is, the diameter of the end of the head 102 far away from the screw 101 is smaller than that of the end of the head 102 close to the screw 101; the outer circular surface of the head part 102 is provided with an inclined groove 1021; the inclined groove 1021 is arranged on the axial surface vertical to the screw 101, and the rotation direction of the inclined groove 1021 is opposite to that of the screw 101; the number of the inclined grooves 1021 is at least 2, and the inclined grooves 1021 are uniformly arranged in a circular array in the full circumferential range of the outer circle surface of the head part 102.

In a specific embodiment, as shown in fig. 5 and 6, when the dry ice granulation machine performs the extrusion molding operation, the piston rod pushes the piston to extrude the snowflake-shaped solid, and at this time, as shown in fig. 3, the front pressure F applied to the piston acts on the inclined groove 1021 to generate the component force F₂Component force F of a plurality of chutes₂Form the moment of torsion, the effect of this moment of torsion makes screw rod 101 screw to realize that bolt body 1 forms the auto-lock effect in compression mechanism working process, this process has effectively solved current compression mechanism and has leaded to taking place the problem that drops under the factor effect such as the fixing bolt that is used for connecting the piston to fix on the piston rod receives vibration among its compression mechanism because of long-time work, has improved and has pressedThe working life of the mechanism is shortened.

Claims (3)

1. A bolt for assembling and connecting a piston and a piston rod comprises a bolt body (1), wherein the bolt body (1) comprises a screw rod (101) and a head part (102), and is characterized in that the outer circular surface of the head part (102) is a conical surface, namely the diameter of one end, far away from the screw rod (101), of the head part (102) is smaller than that of one end, close to the screw rod (101), of the head part (102); the outer circular surface of the head part (102) is provided with an inclined groove (1021); the inclined groove (1021) is arranged on the axial surface perpendicular to the screw (101), and the rotation direction of the inclined groove (1021) is opposite to that of the screw (101).

2. The bolt for the assembly connection of a piston and a piston rod as claimed in claim 1, wherein the number of the inclined grooves (1021) is at least 2, and the inclined grooves (1021) are uniformly distributed in a circular array on the outer circumferential surface of the head part (102).

3. Bolt for the assembly connection of a piston with a piston rod according to claim 1, characterized in that the bolt body (1) is a countersunk bolt.

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