CN112555230A

CN112555230A - Oil cylinder

Info

Publication number: CN112555230A
Application number: CN202011464062.XA
Authority: CN
Inventors: 胡现磊; 魏绪翠; 汤杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-03-26

Abstract

The invention relates to a kind of cylinder, the said cylinder includes: the cylinder body, the upper cylinder cover, the lower cylinder cover, the piston piece, the connecting piece and the locking assembly have the advantages that: according to the invention, the hooking part and the connecting piece are arranged, so that the piston piece can be automatically locked when moving to the lowest end, compared with the prior art, a hydraulic control one-way valve is not required, an oil way is simplified, and the locking is more reliable due to the adoption of mechanical locking; the positioning ball and the second elastic piece are arranged, so that the piston piece can be automatically unlocked when moving upwards, and the device has a simple structure and is reliable to use.

Description

Oil cylinder

Technical Field

The invention relates to the field of oil cylinders, in particular to an oil cylinder with a self-locking function.

Background

With the acceleration of the national urbanization construction pace, the cleaning, greening and beautifying work of cities is very important. The cleaning workload of urban road surface street garbage is also increasing. At present, in some large and medium-sized cities, sanitation garbage trucks are gradually adopted to replace the traditional manual cleaning. The sweeping arm on the sanitation truck is swung out and retracted by adopting an oil cylinder. During cleaning operation, the piston rod of the oil cylinder extends out, the sweeping arm swings out, and the sweeping disc starts to work; when the vehicle is running, the piston rod of the oil cylinder drives the sweeping disc to be retracted and locked, so that the running safety is ensured. At present, the locking of an oil cylinder piston rod is realized by adopting a hydraulic control one-way valve on a hydraulic system. Theoretically, as long as the oil in the rod cavity of the oil cylinder is closed by the hydraulic control one-way valve and is not discharged, the piston rod of the oil cylinder cannot automatically extend out. However, the hydraulic control one-way valve and the piston of the oil cylinder inevitably have leakage, so that the piston rod of the oil cylinder can slowly extend after a long time, and the driving safety is seriously influenced.

Disclosure of Invention

In view of the above, it is necessary to provide a cylinder that can be mechanically locked.

The invention discloses an oil cylinder, which comprises:

the cylinder body is cylindrical, and the side surface of the cylinder body is provided with an oil port A and an oil port B;

the upper cylinder cover is arranged at the upper end of the cylinder body;

the lower cylinder cover is arranged at the lower end of the cylinder body in a covering mode and matched with the upper cylinder cover to form a first containing cavity in the cylinder body, and a second containing cavity communicated with the first containing cavity is formed in the lower cylinder cover;

the piston part comprises a rod part, a piston part and a hook part, the rod part penetrates through the cylinder cover, the piston part is located in the first containing cavity and divides the first containing cavity into an upper piston cavity and a lower piston cavity, the oil port A is communicated with the upper piston cavity, the oil port B is communicated with the lower piston cavity, the hook part is arranged on the lower side of the piston part, and when the piston part is located at the bottom of the containing cavity, the hook part can extend into the second containing cavity;

the connecting piece is provided with an abutting part and a shifting part, the connecting piece is rotatably arranged in the second containing cavity, when the piston piece moves downwards to the bottom, the hooking part can shift the shifting part so as to rotate the connecting piece, the abutting part is clamped with the hooking part so as to lock the piston piece, and the side surface of the connecting piece is provided with a lock hole;

a third containing cavity is also formed in the lower cylinder cover, the locking component is arranged in the third containing cavity, the locking assembly comprises a locking piece and a first elastic piece, the locking piece is arranged in the third containing cavity in a sliding mode, and divides the third cavity into a left cavity and a right cavity, the left cavity is communicated with the lower piston cavity through a connecting channel, the first elastic element is arranged in the right cavity, one end of the locking piece is abutted against the inner wall of the right accommodating cavity, the other end of the locking piece is abutted against the locking piece, so that the locking piece can extend into the second accommodating cavity, when the abutting part is clamped with the hooking part and the elasticity of the first elastic part is larger than the pressure of the medium in the left containing cavity, the first elastic piece can push the locking piece to move towards the second containing cavity and extend into the locking hole so as to fix the connecting piece.

In one embodiment, a positioning groove is further formed in the side face of the connecting piece, a second spring and a positioning ball are arranged in the lower cylinder cover, when the abutting portion is separated from the hooking portion in a clamping mode, the positioning ball can stretch into the positioning groove under the action of the second spring, so that the connecting piece is fixed, and when the hooking portion moves downwards, the connecting piece can be pushed to rotate, so that the positioning ball is separated from the positioning groove.

In one embodiment, an air guide channel is formed in the lower cylinder cover and is communicated with the right cavity and the outside of the oil cylinder.

In one embodiment, a guide rod is arranged between the upper cylinder cover and the lower cylinder cover, and the guide rod penetrates through the piston part, so that the piston piece can move in the vertical direction and cannot rotate relative to the cylinder body.

The invention has the advantages that:

1. according to the invention, the hooking part and the connecting piece are arranged, so that the piston piece can be automatically locked when moving to the lowest end, compared with the prior art, a hydraulic control one-way valve is not required, an oil way is simplified, and the locking is more reliable due to the adoption of mechanical locking;

2. the invention can automatically unlock the piston piece when the piston piece moves upwards by arranging the positioning ball and the second elastic piece, and has simple structure and reliable use.

Drawings

FIG. 1 is a cross-sectional view of the present invention with the locking assembly in a locked condition;

FIG. 2 is a cross-sectional view taken along the line C-C in FIG. 1;

FIG. 3 is a cross-sectional view of the latch assembly of the present invention shown in the unlocked position;

FIG. 4 is a cross-sectional view taken along line D-D of FIG. 3;

fig. 5 to 6 are three-dimensional structural views of the connecting member of the present invention.

In the figure, a cylinder body 1, an upper piston cavity 11, a lower piston cavity 12, an upper cylinder cover 2, a lower cylinder cover 3, a second containing cavity 31, a left containing cavity 32, a right containing cavity 33, a connecting channel 34, an air guide channel 35, a piston piece 4, a rod part 41, a piston part 42, a hooking part 43, a connecting piece 5, an abutting part 51, a toggle part 52, a lock hole 53, a positioning groove 54, a locking piece 61, a first elastic piece 62, a second elastic piece 71, a positioning ball 72 and a guide rod 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 4, the present invention discloses an oil cylinder, which includes:

the cylinder body 1 is cylindrical, and the side surface of the cylinder body 1 is provided with an oil port A and an oil port B;

the upper cylinder cover 2 is covered at the upper end of the cylinder body 1;

the lower cylinder cover 3 is covered at the lower end of the cylinder body 1 and matched with the upper cylinder cover 2 to form a first containing cavity in the cylinder body 1, and a second containing cavity 31 communicated with the first containing cavity is formed in the lower cylinder cover 3;

the piston part 4 comprises a rod part 41, a piston part 42 and a hook part 43, the rod part 41 penetrates through the cylinder cover, the piston part 42 is located in the first accommodating cavity and divides the first accommodating cavity into an upper piston cavity 11 and a lower piston cavity 12, the oil port A is communicated with the upper piston cavity 11, the oil port B is communicated with the lower piston cavity 12, the hook part 43 is arranged on the lower side of the piston part 42, and when the piston part 42 is located at the bottom of the accommodating cavity, the hook part 43 can extend into the second accommodating cavity 31;

the connecting piece 5, as shown in fig. 5 and 6, has an abutting portion 51 and a toggle portion 52, the connecting piece 5 is rotatably disposed in the second cavity 31, when the piston piece 4 moves downward to the bottom, the hook portion 43 can toggle the toggle portion 52, so that the connecting piece 5 rotates, the abutting portion 51 is in clamping connection with the hook portion 43, so as to lock the piston piece 4, and a lock hole 53 is formed in a side surface of the connecting piece 5;

a third containing cavity is further formed in the lower cylinder cover 3, the locking component is arranged in the third containing cavity, the locking assembly comprises a locking piece 61 and a first elastic piece 62, the locking piece 61 is arranged in the third containing cavity in a sliding mode, and divides the third chamber into a left chamber 32 and a right chamber 33, the left chamber 32 is communicated with the lower piston chamber 12 through a connecting channel 34, the first elastic member 62 is arranged in the right chamber 33, one end of the locking piece 61 abuts against the inner wall of the right accommodating cavity 33, the other end of the locking piece 61 abuts against the locking piece 61, so that the locking piece 61 can extend into the second accommodating cavity 31, when the abutting part 51 is clamped with the hooking part 43, and the elastic force of the first elastic piece 62 is greater than the pressure of the medium in the left accommodating cavity 32, the first elastic element 62 can push the locking element 61 to move towards the second cavity 31 and extend into the locking hole 53 so as to fix the connecting element 5.

Preferably, an air guide channel 35 is formed in the lower cylinder cover 3, and the air guide channel 35 is communicated with the right accommodating cavity 33 and the outside of the oil cylinder.

Preferably, a positioning groove 54 is further formed in the side surface of the connecting member 5, a second elastic member 71 and a positioning ball 72 are arranged in the lower cylinder cover 3, when the abutting portion 51 is disengaged from the hooking portion 43, the positioning ball 72 can extend into the positioning groove 54 under the action of the second elastic member 71, so that the connecting member 5 is fixed, and when the hooking portion 43 moves downward, the connecting member 5 can be pushed to rotate, so that the positioning ball 72 is disengaged from the positioning groove 54.

Preferably, a guide rod 8 is disposed between the upper cylinder head 2 and the lower cylinder head 3, and the guide rod 8 passes through the piston portion 42, so that the piston member 4 can move in a vertical direction and cannot rotate relative to the cylinder block 1, so that the hook portion 43 can be engaged with the connecting member 5.

The working mode of the invention is as follows:

as shown in fig. 1 and 2, at this time, the oil cylinder is in a locked state, and at this time, the medium pressure in the lower piston chamber 12 is low, so that the locking member 61 extends into the locking hole 53 under the action of the first elastic member 62, thereby fixing the connecting member 5, and the abutting portion 51 is clamped with the hooking portion 43, thereby fixing the piston member 4 by the connecting member 5, avoiding the piston member 4 from extending due to the problem of medium leakage, and realizing self-locking of the oil cylinder.

When the oil port a is fed with liquid and the oil port B is discharged with liquid, referring to fig. 2, the medium enters the left receiving cavity 32 through the connecting passage 34, so that the locking member 61 moves to the right side against the elastic force of the first elastic member 62, and disengages from the locking hole 53, so that the connecting member 5 can rotate freely, and when the piston member 4 moves upward, the hooking portion 43 drives the connecting member 5 to rotate, so that the positioning ball 72 enters the positioning groove 54 to fix the connecting member 5.

When the oil port B feeds liquid, and the oil port a discharges liquid, the piston member 4 moves downward, and after the hook portion 43 enters the second accommodating cavity 31, the connecting member 5 can be pushed to rotate clockwise, so that the abutting portion 51 is clamped with the hook portion 43, meanwhile, because the medium pressure in the lower piston cavity 12 is low, the elasticity of the second elastic member 71 cannot be overcome, so that the locking member 61 moves toward the second accommodating cavity 31, and when the connecting member 5 rotates clockwise to the locking hole 53 and the locking member 61 corresponds to each other, the locking member 61 extends into the locking hole 53 under the action of the first elastic member 62, so that the connecting member 5 is fixed, and the self-locking of the oil cylinder is realized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An oil cylinder, characterized in that, the oil cylinder include:

the upper cylinder cover is arranged at the upper end of the cylinder body;

2. The oil cylinder according to claim 1, characterized in that a positioning groove is further formed in the side face of the connecting piece, a second spring and a positioning ball are arranged in the lower cylinder cover, when the abutting portion is disengaged from the hooking portion, the positioning ball can extend into the positioning groove under the action of the second spring, so that the connecting piece is fixed, and when the hooking portion moves downwards, the connecting piece can be pushed to rotate, so that the positioning ball is disengaged from the positioning groove.

3. The oil cylinder as claimed in claim 1, wherein the lower cylinder cover is provided with an air guide channel, and the air guide channel is communicated with the right cavity and the outside of the oil cylinder.

4. The cylinder according to claim 1, wherein a guide rod is provided between the upper and lower cylinder heads, and the guide rod passes through the piston portion, so that the piston member can move in a vertical direction without relative rotation with the cylinder body.