CN219432186U - Swing hydraulic cylinder with unidirectionally adjustable rotation angle for electrohydraulic actuator - Google Patents

Abstract

The utility model discloses a swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electrohydraulic actuator, which comprises: the gear box is provided with a gear, the cylinder barrel is arranged above the gear box, the rack is arranged in the cylinder barrel, the rack is meshed with the gear, a reset mechanism is fixed on one end of the cylinder barrel, the reset mechanism is fixed with one end of the rack, a cylinder cover is covered on the other end of the cylinder barrel, a sealing ring is fixed on the other end of the rack, a first cavity is reserved between the rack and the cylinder cover, a first oil way is arranged on the cylinder cover, a cylinder body is arranged outside the cylinder cover, a cylinder cover is covered on the outer end of the cylinder body, a second oil way is arranged on the cylinder cover, a piston is arranged in the cylinder body, the cylinder body is divided into a second cavity and a third cavity by the piston, the first oil way is communicated with the second cavity, a blocking column is arranged on the inner end of the piston, and a channel is arranged on the cylinder cover and penetrates through the blocking column. The reverse rotation swing angle of the swing hydraulic cylinder is variable, so that the application range of the hydraulic cylinder can be enlarged.

Description

Swing hydraulic cylinder with unidirectionally adjustable rotation angle for electrohydraulic actuator

Technical Field

The utility model relates to the field of electrohydraulic actuators, in particular to a swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electrohydraulic actuator.

Background

The principle of the swing hydraulic cylinder is that the reciprocating motion of the hydraulic cylinder drives a gear through a rack, the reciprocating motion is converted into forward and reverse rotation swing of a gear shaft, and meanwhile, the thrust of the reciprocating cylinder is converted into output torque of the gear shaft. Since the rotation angle of the gear is proportional to the length of the rack, the rotation angle of the gear can be arbitrarily selected and can be more than 360 °. At present, the forward and reverse rotation angles of the existing swing hydraulic cylinders in the market are basically fixed, and are generally 45 degrees, 90 degrees, 180 degrees or 360 degrees. The rotation angle cannot be changed, and the application range of the swing hydraulic cylinder can be narrowed.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: a swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electro-hydraulic actuator is provided.

In order to solve the problems, the utility model adopts the following technical scheme: a swing pneumatic cylinder that is used for rotation angle one-way adjustable of electrohydraulic actuator includes: the gear box is provided with a gear with a key hole in the gear box, the key hole can be used for inserting a valve shaft, the gear can rotate through the driving valve shaft to control the valve, a cylinder barrel is arranged above the gear box, the middle part of the cylinder barrel is communicated with the gear box, a cylindrical rack is arranged in the cylinder barrel, the rack is meshed with the gear through the communicating part of the cylinder barrel and the gear box, a reset mechanism is fixed at one end of the cylinder barrel, a telescopic rod in the reset mechanism is inserted into the cylinder barrel and is fixed with one end of the rack, a cylinder cover is covered at the other end of the cylinder barrel, a sealing ring capable of sealing a gap between the end of the rack and the cylinder barrel is arranged at the other end of the rack, a first cavity is reserved between the rack and the cylinder cover, a first oil way communicated with the first cavity is arranged on the cylinder cover, and pressure oil can drive the rack after being led into the first cavity through the first oil way, so that the rack can overcome the elasticity of the reset mechanism and move towards the other end of the cylinder barrel, and the rack can be driven to rotate in the forward direction, and the rack can be driven to rotate under the action of the reset mechanism when the pressure oil passes through the first cavity, the reset mechanism, the rack can be driven to rotate in the reverse direction, and the rack can be driven by the rotation, and the rack is characterized in that: the cylinder cover is welded and sealed on the inner end of the cylinder cover, the cylinder cover is covered on the outer end of the cylinder cover, a second oil way is arranged on the cylinder cover, a piston is arranged in the cylinder body, the inner cavity of the cylinder body is divided into two chambers by the piston, the two chambers are respectively a second chamber and a third chamber, the second chamber is positioned on the inner side of the piston, the third chamber is positioned on the outer side of the piston, the first oil way is communicated with the second chamber, the second oil way is communicated with the third chamber, a blocking column is arranged on the inner end of the piston, a channel is arranged on the cylinder cover, the blocking column penetrates through the channel, the blocking column and the channel are sealed by a sealing ring, pressure oil is introduced into the third chamber through the second oil way, meanwhile, after the oil in the second chamber is discharged through the first oil way, the piston can be driven by the pressure oil to lean against the cylinder cover, and at the moment, the blocking column can penetrate through the channel to be inserted into the first chamber under the driving of the piston, so that the blocking column can be blocked by the rack and the reset stroke of the rack can be shortened, and the angle of reverse rotation of the gear can be reduced.

Further, the swing hydraulic cylinder with unidirectionally adjustable rotation angle for the electro-hydraulic actuator, wherein: the reset mechanism is a gas spring.

Further, the swing hydraulic cylinder with unidirectionally adjustable rotation angle for the electro-hydraulic actuator, wherein: the reset mechanism is a telescopic cylinder reset by a mechanical spring.

Further, the swing hydraulic cylinder with unidirectionally adjustable rotation angle for the electro-hydraulic actuator, wherein: the first oil way is provided with two, and respectively distribute on the opposite both sides of cylinder cap.

Further, the swing hydraulic cylinder with unidirectionally adjustable rotation angle for the electro-hydraulic actuator, wherein: the second oil way is provided with two and is respectively distributed on two opposite sides of the cylinder cover.

The utility model has the advantages that: the blocking column is arranged in the swing hydraulic cylinder, and can extend out of the cylinder cover or retract into the cylinder cover under the drive of the piston, and the reset stroke of the rack can be shortened by blocking the rack when the blocking column extends out of the cylinder cover, so that the angle of reverse rotation of the swing hydraulic cylinder can be reduced; when the blocking column is retracted into the cylinder cover, the reverse rotation angle of the swing hydraulic cylinder can be restored to the normal state, so that the swing hydraulic cylinder has a larger application range.

Drawings

Fig. 1 is a schematic structural view of a swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electro-hydraulic actuator.

Detailed Description

The utility model is described in further detail below with reference to specific embodiments and the accompanying drawings.

As shown in fig. 1, a swing hydraulic cylinder for an electrohydraulic actuator with a rotation angle unidirectionally adjustable includes: the gear box 1, a gear 2 with a key hole is arranged in the gear box 1, the key hole can be used for inserting a valve shaft, so that the gear 2 can control the valve by driving the valve shaft to rotate, a cylinder 3 is arranged above the gear box 1, the middle part of the cylinder 3 is communicated with the gear box 1, a cylindrical rack 4 is arranged in the cylinder 3, the rack 4 is meshed with the gear 2 through the communication part of the cylinder 3 and the gear box 1, a reset mechanism 5 is fixed on one end of the cylinder 3, a telescopic rod 6 in the reset mechanism 5 is inserted into the cylinder 3 and is fixed with one end of the rack 4, a cylinder cover 7 is capped on the other end of the cylinder 3, a sealing ring capable of sealing a gap between the end part of the rack 4 and the cylinder 3 is arranged on the other end of the rack 4, a first cavity 9 is reserved between the rack 4 and the cylinder cover 7, a first oil way 10 communicated with the first cavity 9 is arranged on the cylinder cover 7, the rack 4 can be driven after the pressure oil is introduced into the first chamber 9 through the first oil way 10, so that the rack 4 can overcome the elasticity of the reset mechanism 5 and move towards the other end of the cylinder barrel 3, the rack 4 can drive the gear 2 to rotate positively, when the pressure oil is discharged out of the first chamber 9 through the first oil way 10, the rack 4 can reset under the action of the reset mechanism 5, so that the rack 4 can drive the gear 2 to rotate reversely, a cylinder body 11 is arranged at the outer side of the cylinder cover 7, the cylinder cover 7 is welded and sealed on the inner end of the cylinder body 11, a cylinder cover 12 is covered on the outer end of the cylinder body 11, a second oil way 13 is arranged on the cylinder cover 12, a piston 14 is arranged in the cylinder body 11, the inner cavity of the cylinder body is divided into two chambers, namely a second chamber 17 and a third chamber 18, the second chamber 17 is positioned at the inner side of the piston 14, the third chamber 18 is positioned at the outer side of the piston 14, the first oil way 10 is also communicated with the second chamber 17, the second oil way 13 is communicated with the third chamber 18, a blocking column 15 is arranged at the inner end of the piston 14, a channel 16 is arranged on the cylinder cover 7, the blocking column 15 penetrates through the channel 16, a sealing ring is adopted between the blocking column 15 and the channel 16 for sealing, pressure oil is introduced into the third chamber 18 through the second oil way 13, meanwhile, after oil in the second chamber 17 is discharged through the first oil way 10, the piston 14 can be driven by the pressure oil to abut against the cylinder cover 7, at the moment, the blocking column 15 can penetrate through the channel 16 and be inserted into the first chamber 9 under the driving of the piston 14, so that the blocking column 15 can shorten the reset stroke of the rack 4 by blocking the rack 4, and the reverse rotation angle of the gear can be reduced; after the pressure oil is introduced into the second chamber 17 through the first oil path 10 and the oil in the third chamber 18 is discharged through the second oil path 13, the piston 14 can be driven by the pressure oil to abut against the cylinder cover 12, at this time, the blocking column 15 can retract into the channel 16 under the driving of the piston 14, and at this time, the reverse rotation angle of the gear can be restored to the normal state.

In the present embodiment, the return mechanism 5 is a gas spring. In practical applications, the return mechanism 5 may be a telescopic cylinder that is returned by a mechanical spring.

The first oil passages 10 are provided in two and are respectively distributed on opposite sides of the cylinder head 7. The second oil passages 13 are provided in two and are respectively distributed on opposite sides of the cylinder cover 12. The additional first and second oil passages 10 and 13 are used to connect with a pressure gauge so that the pressure in the chamber can be detected.

Claims (5)

1. A swing pneumatic cylinder that is used for rotation angle one-way adjustable of electrohydraulic actuator includes: the gear box is provided with a gear with a key hole in the gear box, the key hole can be used for inserting a valve shaft, the gear can rotate through the driving valve shaft to control the valve, a cylinder barrel is arranged above the gear box, the middle part of the cylinder barrel is communicated with the gear box, a cylindrical rack is arranged in the cylinder barrel, the rack is meshed with the gear through the communicating part of the cylinder barrel and the gear box, a reset mechanism is fixed at one end of the cylinder barrel, a telescopic rod in the reset mechanism is inserted into the cylinder barrel and is fixed with one end of the rack, a cylinder cover is covered at the other end of the cylinder barrel, a sealing ring capable of sealing a gap between the end of the rack and the cylinder barrel is arranged at the other end of the rack, a first cavity is reserved between the rack and the cylinder cover, a first oil way communicated with the first cavity is arranged on the cylinder cover, and pressure oil can drive the rack after being led into the first cavity through the first oil way, so that the rack can overcome the elasticity of the reset mechanism and move towards the other end of the cylinder barrel, and the rack can be driven to rotate in the forward direction, and the rack can be driven to rotate under the action of the reset mechanism when the pressure oil passes through the first cavity, the reset mechanism, the rack can be driven to rotate in the reverse direction, and the rack can be driven by the rotation, and the rack is characterized in that: the cylinder cover is welded and sealed on the inner end of the cylinder cover, the cylinder cover is covered on the outer end of the cylinder cover, a second oil way is arranged on the cylinder cover, a piston is arranged in the cylinder body, the inner cavity of the cylinder body is divided into two chambers by the piston, the two chambers are respectively a second chamber and a third chamber, the second chamber is positioned on the inner side of the piston, the third chamber is positioned on the outer side of the piston, the first oil way is communicated with the second chamber, the second oil way is communicated with the third chamber, a blocking column is arranged on the inner end of the piston, a channel is arranged on the cylinder cover, the blocking column penetrates through the channel, the blocking column and the channel are sealed by a sealing ring, pressure oil is introduced into the third chamber through the second oil way, meanwhile, after the oil in the second chamber is discharged through the first oil way, the piston can be driven by the pressure oil to lean against the cylinder cover, and at the moment, the blocking column can penetrate through the channel to be inserted into the first chamber under the driving of the piston, so that the blocking column can be blocked by the rack and the reset stroke of the rack can be shortened, and the angle of reverse rotation of the gear can be reduced.

2. The swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electro-hydraulic actuator according to claim 1, wherein: the reset mechanism is a gas spring.

3. The swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electro-hydraulic actuator according to claim 1, wherein: the reset mechanism is a telescopic cylinder reset by a mechanical spring.

4. A swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electro-hydraulic actuator according to claim 1 or 2 or 3, characterized in that: the first oil way is provided with two, and respectively distribute on the opposite both sides of cylinder cap.

5. A swing hydraulic cylinder with unidirectionally adjustable rotation angle for an electro-hydraulic actuator according to claim 1 or 2 or 3, characterized in that: the second oil way is provided with two and is respectively distributed on two opposite sides of the cylinder cover.