CN113864282A

CN113864282A - Double-stroke cylinder

Info

Publication number: CN113864282A
Application number: CN202111209387.8A
Authority: CN
Inventors: 鲁岱; 卢洁红
Original assignee: Beijing Shinaigu Connection Technology Co ltd
Current assignee: Beijing Shinaigu Connection Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2021-12-31

Abstract

The invention discloses a double-stroke cylinder. The double-stroke air cylinder comprises a working cylinder, a pre-stroke cylinder and a pressurizing cylinder which are sequentially connected, wherein the working cylinder comprises a working cylinder barrel; the working piston is arranged in the working cylinder barrel and divides the working cylinder barrel into a first air chamber and a second air chamber; the working shaft is connected with the working piston to perform transmission; the pre-stroke cylinder comprises a pre-stroke cylinder barrel; the sleeve piston is arranged in the pre-stroke cylinder barrel, and the sleeve piston and the pre-stroke cylinder barrel form a fourth air chamber; the pressurizing cylinder comprises a pressurizing cylinder barrel; a pressurizing piston provided in the pressurizing cylinder, the pressurizing piston dividing the pressurizing cylinder into a fifth air chamber and a sixth air chamber; the clamping groove shaft is connected with the pressurizing piston and used for transmission; the double-stroke cylinder also comprises a locking mechanism used for connecting the working shaft and the clamping groove shaft. According to the double-stroke air cylinder disclosed by the embodiment of the invention, the size and the output pressure of the air cylinder are considered.

Description

Double-stroke cylinder

Technical Field

The invention relates to the technical field of cylinders, in particular to a double-stroke cylinder.

Background

The cylinder has variable length, is convenient to operate, can effectively complete linear motion, and is widely applied to various industries. Two-stroke cylinders are becoming more widely used because they have longer strokes and can provide greater output pressures.

With the development of automobile manufacturing industry, higher requirements are made on the volume and output pressure of welding equipment. The cylinder element in the welding apparatus is an important power element. In order to enable the cylinder to output larger pressure, schemes of increasing the diameter of the cylinder barrel, connecting more cylinders in series and the like are often adopted, the overall size of the cylinder is greatly increased, and the size and the weight of the whole welding machine are directly influenced. In the prior art, the installation size and the output pressure of the cylinder cannot be considered at the same time.

Therefore, a new two-stroke cylinder is desired that solves the above problems.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a two-stroke cylinder that can achieve both the size of the cylinder and the output pressure.

According to one aspect of the invention, a double-stroke cylinder is provided, which comprises a working cylinder, a pre-stroke cylinder and a pressurizing cylinder which are connected in sequence, wherein the working cylinder comprises a working cylinder barrel; the working piston is arranged in the working cylinder barrel and divides the working cylinder barrel into a first air chamber and a second air chamber; the working shaft is connected with the working piston to perform transmission; the pre-stroke cylinder comprises a pre-stroke cylinder barrel; the sleeve piston is arranged in the pre-stroke cylinder barrel, and the sleeve piston and the pre-stroke cylinder barrel form a fourth air chamber; the pressurizing cylinder comprises a pressurizing cylinder barrel; a pressurizing piston provided in the pressurizing cylinder, the pressurizing piston dividing the pressurizing cylinder into a fifth air chamber and a sixth air chamber; the clamping groove shaft is connected with the pressurizing piston and used for transmission; the double-stroke cylinder further comprises a locking mechanism used for connecting the working shaft and the clamping groove shaft.

Preferably, the sleeve piston comprises a piston head; and a piston body connected to the piston head, at least a portion of the piston body forming the working cylinder.

Preferably, the sleeve piston is sleeved on the clamping groove shaft; at least one part of the working shaft is sleeved on the clamping groove shaft.

Preferably, the locking mechanism comprises a first connecting part arranged on the working shaft and used for connecting the working shaft with the clamping groove shaft; the second connecting part is matched with the first connecting part, is arranged on the clamping groove shaft and is used for connecting the clamping groove shaft and the working shaft; and a fixing member for fixing the first connection portion and the second connection portion after the first connection portion and the second connection portion are connected.

Preferably, the locking mechanism comprises a ball arranged on the working shaft and used for connecting the working shaft with the clamping groove shaft; the clamping groove is matched with the ball, is arranged on the clamping groove shaft and is used for connecting the clamping groove shaft and the working shaft; the clamping and locking mechanism further comprises a clamping sleeve sleeved on the working shaft, and the clamping sleeve comprises a guide groove for guiding the connection between the ball and the clamping groove; and the spring is sleeved on the working shaft and used for fixing the clamping sleeve, wherein at least one part of the working shaft is sleeved on the clamping groove shaft, and the ball is arranged on the working shaft sleeved on the clamping groove shaft.

Preferably, the double-stroke cylinder further comprises a first air hole communicated with the first air chamber and used for air intake and/or air exhaust of the first air chamber; the second air hole is communicated with the second air chamber and is used for air intake and/or air exhaust of the second air chamber; the fourth air hole is communicated with the fourth air chamber and is used for air inlet and/or air exhaust of the fourth air chamber, wherein air enters the fourth air chamber through the fourth air hole and drives the sleeve piston to drive the working piston and the working shaft to move, so that the working shaft is connected with the clamping groove shaft; gas enters the second air chamber through the second air hole and drives the working shaft to move along a first direction; and gas enters the first air chamber through the first air hole and drives the working shaft to move along the direction opposite to the first direction.

Preferably, the double-stroke cylinder further comprises a fifth air hole communicated with the fifth air chamber and used for air intake and/or exhaust of the fifth air chamber; the sixth air hole is communicated with the sixth air chamber and is used for air inlet and/or air exhaust of the sixth air chamber, wherein air enters the sixth air chamber through the sixth air hole so as to drive the pressurizing piston and the clamping groove shaft to move along the first direction and drive the clamping groove shaft and the working shaft to move under the condition that the clamping groove shaft is connected with the working shaft; gas enters the fifth air chamber through the fifth air hole to drive the pressurizing piston and the clamping groove shaft to move along the direction opposite to the first direction, and the clamping groove shaft and the working shaft are driven to move under the condition that the clamping groove shaft and the working shaft are connected; when the fifth air chamber is at the position with the maximum volume, air enters the first air chamber through the first air hole and drives the working piston and the working shaft to move, so that the working shaft is separated from the clamping groove shaft.

Preferably, the diameter of the working cylinder is smaller than or equal to the diameter of the pre-stroke cylinder; and/or the diameter of the working piston is less than or equal to the diameter of the sleeve piston; the diameter of the pre-stroke cylinder barrel is smaller than that of the pressurizing cylinder barrel; and/or the diameter of the sleeve piston is smaller than the diameter of the pressurizing piston.

Preferably, one end of the working shaft is provided with a slot; one end of the clamping groove shaft is movably arranged in the groove; and a ventilation pipeline is arranged on the clamping groove shaft, and the ventilation pipeline is respectively communicated with the groove and the first air chamber and is used for the circulation of air.

Preferably, the double-stroke cylinder comprises an initial station, a pre-stroke station and a working station; when the double-stroke cylinder is positioned at the initial station, the first air chamber and the fifth air chamber are positioned at the positions with the largest volume, and the second air chamber, the fourth air chamber and the sixth air chamber are positioned at the positions with the smallest volume; when the double-stroke cylinder is positioned at a pre-stroke station, the fourth air chamber is positioned at the position with the largest volume, the fifth air chamber is positioned at the position with the largest volume, and the working shaft is connected with the clamping groove shaft through the clamping mechanism; when the double-stroke cylinder is positioned at the working station, the first air chamber and the fifth air chamber are positioned at the positions with the minimum volume, and the second air chamber, the fourth air chamber and the sixth air chamber are positioned at the positions with the maximum volume.

According to the double-stroke air cylinder provided by the embodiment of the invention, the clamping mechanism for connecting the working shaft and the clamping groove shaft is arranged, so that the size and the output pressure of the double-stroke air cylinder can be considered.

According to the double-stroke air cylinder provided by the embodiment of the invention, at least one part of the clamping groove shaft is movably arranged in the working shaft, and the ventilation pipeline for gas circulation is arranged, so that the relative movement between the working shaft and the pressurizing cylinder shaft is more reliable.

According to the double-stroke cylinder disclosed by the embodiment of the invention, the diameter of the pressurizing piston is larger than that of the sleeve piston, the diameter of the sleeve piston is larger than that of the working piston, and the double-stroke cylinder has a more flexible movement mode.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic diagram of an arrangement of a two-stroke cylinder according to an embodiment of the invention;

fig. 2 shows a schematic structural view of a two-stroke cylinder according to an embodiment of the present invention.

Detailed Description

Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

FIG. 1 shows a schematic diagram of an arrangement of a two-stroke cylinder according to an embodiment of the invention. As shown in fig. 1, the two-stroke cylinder according to the embodiment of the present invention includes a working cylinder 100, a pre-stroke cylinder 200, and a pressurizing cylinder 300, which are connected in this order. Wherein the working cylinder 100 comprises a working cylinder barrel 101, a working piston 9 and a working shaft 1; the pre-stroke cylinder 200 comprises a pre-stroke cylinder barrel 10 and a sleeve piston 7; the pressurizing cylinder 300 includes a pressurizing cylinder tube 12, a pressurizing piston 14, and a chuck shaft 13. The double-stroke cylinder further comprises a latch mechanism 400 for connecting the working shaft 1 and the pocket shaft 13. The two-stroke cylinder is partitioned into, for example, a first air chamber 501, a second air chamber 502, a fourth air chamber 504, a fifth air chamber 505, and a sixth air chamber 506.

Specifically, the cylinder 100 includes a cylinder tube 101. The cylinder tube 101 is, for example, cylindrical.

The working piston 9 is provided in the working cylinder 101, and the working piston 9 partitions the working cylinder 101 into a first air chamber 501 and a second air chamber 502. Alternatively, the diameter of the working piston 9 is matched to the inner diameter of the working cylinder 101, and the working piston 9 partitions the working cylinder 101 into a first air chamber 501 and a second air chamber 502 which are not communicated with each other. The first air chamber 501 is located, for example, on the left side of the illustrated working piston 9, and the second air chamber 502 is located, for example, on the right side of the illustrated working piston 9.

The working shaft 1 is connected to a working piston 9 for transmission. Referring to fig. 1, the working piston 9 moves left and right in the working cylinder 101, thereby moving the working shaft 1 left and right. Alternatively, the working shaft 1 is integrally formed with the working piston 9.

The pre-stroke cylinder 200 includes a pre-stroke cylinder barrel 10. The pre-stroke cylinder 10 is, for example, cylindrical. Optionally, the diameter of the working cylinder 101 is smaller than or equal to the diameter of the pre-stroke cylinder 200. Optionally, the cylinder bore is intake mid-way during pre-stroke.

The sleeve piston 7 is disposed in the pre-stroke cylinder 10, and the sleeve piston 7 and the pre-stroke cylinder 10 stroke the fourth air chamber 504. Optionally, the diameter of the sleeve piston 7 is matched to the inner diameter of the pre-stroke cylinder 10. Optionally, the diameter of the working piston 9 is smaller than or equal to the diameter of the sleeve piston 7. Optionally, the bottom of the sleeve piston 7 is provided with an air inlet, and the sleeve piston 7 can push the working piston to advance.

The pressurizing cylinder 300 includes a pressurizing cylinder tube 12. The pressure cylinder 12 is, for example, cylindrical. Optionally, the diameter of the pre-stroke cylinder 10 is smaller than the diameter of the pressurizing cylinder 12.

The pressurizing piston 14 is provided in the pressurizing cylinder 12, and the pressurizing piston 14 partitions the pressurizing cylinder 12 into a fifth air chamber 505 and a sixth air chamber 506. Alternatively, the diameter of the sleeve piston 7 is smaller than the diameter of the pressurizing piston 14.

Alternatively, the diameter of the pressurizing piston 14 matches the inner diameter of the pressurizing cylinder 12, and the pressurizing piston 14 divides the pressurizing cylinder 12 into a fifth air chamber 505 and a sixth air chamber 506 that are not communicated with each other. The fifth air chamber 505 is located, for example, on the left side of the illustrated pressurizing piston 14, and the sixth air chamber 506 is located, for example, on the right side of the pressurizing piston 14.

The grooved shaft 13 is connected to a pressurizing piston 14 for transmission. Referring to fig. 1, the pressurizing piston 14 moves left and right in the pressurizing cylinder 12, thereby moving the chuck shaft 13 left and right. Alternatively, the catch shaft 13 is integrally formed with the pressurizing piston 14.

The double-stroke cylinder further comprises a latch mechanism 400 for connecting the working shaft 1 and the pocket shaft 13.

In an alternative embodiment of the invention, the sleeve piston 7 is fitted over the bayonet shaft 13. At least a part of the working shaft 1 is sleeved on the slot shaft 13.

Fig. 2 shows a schematic structural view of a two-stroke cylinder according to an embodiment of the present invention. As shown in fig. 2, the double-stroke cylinder according to the embodiment of the present invention includes at least one of a working shaft (cylinder shaft) 1, a front cylinder cover 2, a spring 3, a guide sleeve 4, a stopper (stopper) ring 5, a ferrule 6, a sleeve piston 7, a ball 8, a working piston 9, a pre-stroke cylinder 10, a middle partition 11, a pressurizing cylinder 12, a notch shaft 13, a pressurizing piston 14, and a rear cover 15. The two-stroke cylinder is further provided with, for example, a first air hole 601, a second air hole 602, a fourth air hole 604, a fifth air hole 605, and a sixth air hole 606. The two-stroke cylinder is partitioned into, for example, a first air chamber 501, a second air chamber 502, a fourth air chamber 504, a fifth air chamber 505, and a sixth air chamber 506.

Specifically, the two-stroke cylinder includes a pre-stroke cylinder, a working (stroke) cylinder, a pressurization cylinder, and a latch mechanism. The pre-stroke cylinder includes, for example, a front cylinder head 2, a pre-stroke cylinder tube 10, a sleeve piston 7, and a diaphragm plate 11. The working cylinder comprises, for example, a working shaft 1, a working piston 9, at least a part of the sleeve piston 7 (the inner cavity of the sleeve piston 7) and a limit stop 5. The pressurizing cylinder includes, for example, a center spacer 11, a pressurizing cylinder 12, a chuck shaft 13, a pressurizing piston 14, and a rear cover 15. At least two of the spring 3, the guide sleeve 4, the clamping sleeve 6, the ball 8, the working shaft 1 and the clamping groove shaft 13 form a clamping and locking mechanism.

In an alternative embodiment of the invention, the front head 2 is located at one end of the double-stroke cylinder for sealing of the double-stroke cylinder, for example for sealing of the first air chamber 501. The front cylinder head 2 is provided with a through hole for passing through the working shaft 1, for example. A rear cover 15 is located at the other end of the two-stroke cylinder for sealing the two-stroke cylinder, for example for sealing the sixth air chamber 506.

In an alternative embodiment of the invention, a mid-diaphragm 11 is also provided in the two-stroke cylinder. The intermediate partition 11 serves to partition the sleeve piston 7 and the pressurizing piston 14, i.e., to partition the fourth air chamber 504 and the fifth air chamber 505.

In an alternative embodiment of the invention, the double-stroke cylinder further comprises a guide sleeve 4 and a limit stop ring 5. The guide sleeve 4 is used to form a latching mechanism. The guide sleeve 4 is, for example, fitted over the ferrule 6 for guiding the movement of the ferrule 6. The limit stop ring 5 is connected to the working shaft 1, for example, for limiting.

In an alternative embodiment of the invention, the sleeve piston 7 comprises a piston head 71 and a piston body 72. The diameter of the piston head 71 is matched, for example, to the inner diameter of the pre-stroke cylinder 10. The piston body 72 is connected to the piston head 71, and at least a part of the piston body 72 is used to form a working cylinder. Alternatively, the piston body 72 is cylindrical, and the outer diameter of the piston body 72 matches the inner diameter of the pre-stroke cylinder 10. Alternatively, the piston head 71 and the piston body 72 may move in the pre-stroke cylinder 10.

In an alternative embodiment of the invention, one end of the working shaft 1 is provided with a slot. One end of the notch shaft 13 is movably disposed in the notch. The slot shaft 13 is provided with a vent pipeline 16, and the vent pipeline 16 is respectively communicated with the slot and the first air chamber 501 for the circulation of air.

In an alternative embodiment of the invention, the latch mechanism includes a first connecting portion, a second connecting portion and a securing member. The first connecting part is arranged on the working shaft 1 and used for connecting the working shaft 1 with the clamping groove shaft 13. The second connecting part is matched with the first connecting part and arranged on the clamping groove shaft 13 and used for connecting the clamping groove shaft 13 with the working shaft 1. The fixing piece is used for fixing the first connecting part and the second connecting part after the first connecting part and the second connecting part are connected.

In an alternative embodiment of the invention, the latching mechanism comprises a ball 8 and a catch. The ball 8 is arranged on the working shaft 1 and used for connecting the working shaft 1 with the clamping groove shaft 13. The clamping groove is matched with the ball 8 and is arranged on a clamping groove shaft 13, and the clamping groove is used for connecting the clamping groove shaft 13 with the working shaft 1. The locking mechanism also comprises a clamping sleeve 6 sleeved on the working shaft 1. The ferrule 6 comprises a guide groove and a spring 3. The guide groove is used for guiding the connection of the ball 8 and the clamping groove. The spring 3 is sleeved on the working shaft 1 and used for fixing the clamping sleeve 6. The spring 3 is, for example, a wave spring structure. At least one part of the working shaft 1 is sleeved on the slot shaft 13, and the ball 8 is arranged on the working shaft 1 sleeved on the slot shaft 13.

In an alternative embodiment of the present invention, the first air vent 601 communicates with the first air chamber 501 for air intake and/or exhaust of the first air chamber 501; the second air hole 602 is communicated with the second air chamber 502 and is used for air intake and/or air exhaust of the second air chamber 502; fourth plenum 604 communicates with fourth plenum 504 for intake and/or exhaust of the fourth plenum. The gas enters the fourth gas chamber 504 through the fourth gas hole 604, and drives the sleeve piston 7 to drive the working piston 9 and the working shaft 1 to move, so that the working shaft 1 is connected with the clamping groove shaft 13; the gas enters the second gas chamber 502 through the second gas hole 602 and drives the working shaft 1 to move in a first direction (e.g., from right to left in the drawing); the gas enters the first gas chamber 501 through the first gas hole 601 and drives the operation shaft 1 to move in the reverse direction of the first direction. Optionally, the two-stroke cylinder further includes a fifth air bore 605 and a sixth air bore 606. The fifth air hole 605 is communicated with the fifth air chamber 505 and is used for air intake and/or air exhaust of the fifth air chamber 505; the sixth air hole 606 communicates with the sixth air chamber 506 for intake and/or exhaust of the sixth air chamber 506. The gas enters the sixth gas chamber 506 through the sixth gas hole 606 to drive the pressurizing piston 14 and the clamping groove shaft 13 to move along the first direction, and drive the clamping groove shaft 13 and the working shaft 1 to move under the condition that the clamping groove shaft 13 is connected with the working shaft 1; the gas enters the fifth air chamber 505 through the fifth air hole 605 to drive the pressurizing piston 14 and the clamping groove shaft 13 to move along the reverse direction of the first direction, and drives the clamping groove shaft 13 and the working shaft 1 to move under the condition that the clamping groove shaft 13 is connected with the working shaft 1; when the fifth air chamber 505 is at the maximum volume position, air enters the first air chamber 501 through the first air hole 601, and drives the working piston 9 and the working shaft 1 to move, so that the working shaft 1 is separated from the card slot shaft 13.

In an alternative embodiment of the invention, the two-stroke cylinder includes an initial station, a pre-stroke station, and a work station. When the double-stroke cylinder is in an initial station, the first air chamber 501 and the fifth air chamber 505 are in the positions with the largest volume, and the second air chamber 502, the fourth air chamber 504 and the sixth air chamber 506 are in the positions with the smallest volume; when the double-stroke cylinder is positioned at a pre-stroke station, the fourth air chamber 504 is positioned at the position with the largest volume, the fifth air chamber 505 is positioned at the position with the largest volume, and the working shaft 1 is connected with the clamping groove shaft 13 through a clamping mechanism; when the double-stroke cylinder is in the working position, the first air chamber 501 and the fifth air chamber 505 are at the positions with the minimum volume, and the second air chamber 502, the fourth air chamber 504 and the sixth air chamber 506 are at the positions with the maximum volume.

In an alternative embodiment of the present invention, shown in connection with FIG. 2, the operation of the two-stroke cylinder is as follows:

the initial position of the double-stroke cylinder is the rightmost end, and when the double-stroke cylinder is in the initial position, the pressurizing piston 14, the sleeve piston 7 and the working piston 9 are all located at the rightmost end. This position is, for example, a "large opening" state.

The two-stroke cylinder first moves from an initial position (large opening state) to a pre-stroke position (small opening state) and stays at the pre-stroke position (small opening state).

When the double-stroke cylinder performs work (for example, when welding work is performed), the double-stroke cylinder moves from a pre-stroke position (a small opening state) to a working position (a closed state) until the working shaft 1 presses a workpiece, and then the movement is stopped, and the welding of the equipment is started. After the work (welding) is finished, the double-stroke cylinder moves to a pre-stroke position (small opening state) and stays at the pre-stroke position; thus, the reciprocating motion is carried out between the pre-stroke position and the working position (closed state), the working (welding) action is repeated, and a working cycle is formed by repeated welding actions for many times.

When one working cycle is completed, the double-stroke cylinder moves from the pre-stroke position (small opening state) to the initial position (large opening state) and stays at the large opening position.

In an alternative embodiment of the invention, shown in connection with fig. 2, the operating principle of the two-stroke cylinder is as follows:

the first step is as follows: from the initial position to the pre-stroke position (from the large-opening state to the small-opening state)

Under the control of the air valve, the fourth air hole 604 is used for air inlet, the first air hole 601 is used for air exhaust, the fifth air hole 605 is used for air inlet, compressed air pushes the sleeve piston 7 to drive the working piston 9, the working shaft 1 and the ball 8 to move towards the left in the figure until the sleeve piston 7 is contacted with the front end cover 2, and the ball 8 enters the clamping groove of the clamping groove shaft 13 under the guiding of the conical surface of the clamping sleeve 6 to form the pre-connection of the working piston 9 and the clamping groove shaft 13.

The compressed gas entering from the fifth air hole 605 acts on the left side of the pressurizing piston 14 to keep the relative positions of the pressurizing piston 14 and the clamping groove shaft 13, and because the area of the pressurizing piston 14 is larger than that of the sleeve piston 7, under the same gas pressure, a pressure difference in the opposite direction is formed between the pressurizing piston 14 and the sleeve piston 7, so that the working shaft 1 is kept in a static state under the action of external force.

The second step is that: from the pre-stroke position to the working position (from the small open state to the closed state)

The sixth air hole 606 and the second air hole 602 simultaneously supply air, the fifth air hole 605 exhausts air, the pressurizing piston 14, the clamping groove shaft 13, the working shaft 1, the working piston 9 and the ball 8 simultaneously move leftwards, the clamping sleeve 6 is kept still under the spring force of the spring 3, so that clamping locking is formed among the clamping sleeve 6, the ball 8, the working shaft 1 and the clamping groove shaft 13 are connected in series into a whole, and the force output outwards is the sum of the pressures generated by the working piston 9 and the pressurizing piston 14 through compressed air. Optionally, the working shaft 1 and the slot shaft 13 are provided with vent holes (vent pipes 16) for discharging the gas in the slots of the working shaft 1 when moving from the pre-stroke position to the initial position.

The third step: from the working position to the pre-stroke position (from the closed state to the small-opening state)

The fifth air hole 605 is used for air intake, the sixth air hole 606 and the second air hole 602 are used for air exhaust, the clamping groove shaft 13 drives the working piston 9 and the working shaft 1 to synchronously move rightwards through the clamping and locking structure of the ball 8 and the clamping sleeve 6, and the ball 8 at the right end is separated from the clamping and locking range of the clamping sleeve 6.

The fourth step: from the pre-stroke position to the initial position (from the small-opening state to the large-opening state)

The first air hole 601 is filled with air, the fourth air hole 604 is exhausted, and the compressed air pushes the working piston 9 and the sleeve piston 7 to move to the right until the sleeve piston 7 contacts the middle partition plate 11.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a double-stroke cylinder, is including the working cylinder, the cylinder of stroke in advance and the pressure cylinder that connect gradually, its characterized in that, the working cylinder includes:

a working cylinder barrel;

the working piston is arranged in the working cylinder barrel and divides the working cylinder barrel into a first air chamber and a second air chamber; and

the working shaft is connected with the working piston to carry out transmission;

the pre-stroke cylinder includes:

a pre-stroke cylinder barrel; and

the sleeve piston is arranged in the pre-stroke cylinder barrel, and the sleeve piston and the pre-stroke cylinder barrel form a fourth air chamber;

the pressurizing cylinder includes:

a pressurized cylinder barrel;

a pressurizing piston provided in the pressurizing cylinder, the pressurizing piston dividing the pressurizing cylinder into a fifth air chamber and a sixth air chamber; and

the clamping groove shaft is connected with the pressurizing piston and used for transmission;

the double-stroke cylinder further comprises a locking mechanism used for connecting the working shaft and the clamping groove shaft.

2. The dual stroke cylinder of claim 1 wherein said sleeve piston comprises:

a piston head; and

a piston body connected to the piston head, at least a portion of the piston body forming the working cylinder.

3. The dual stroke cylinder of claim 1 wherein said sleeve piston is sleeved on said grooved shaft;

at least one part of the working shaft is sleeved on the clamping groove shaft.

4. The dual stroke cylinder of claim 1 wherein said latch mechanism comprises:

the first connecting part is arranged on the working shaft and used for connecting the working shaft with the clamping groove shaft;

the second connecting part is matched with the first connecting part, is arranged on the clamping groove shaft and is used for connecting the clamping groove shaft and the working shaft; and

and the fixing piece is used for fixing the first connecting part and the second connecting part after the first connecting part and the second connecting part are connected.

5. The dual stroke cylinder of claim 1 wherein said latch mechanism comprises:

the ball is arranged on the working shaft and used for connecting the working shaft with the clamping groove shaft;

the clamping groove is matched with the ball, is arranged on the clamping groove shaft and is used for connecting the clamping groove shaft and the working shaft;

the kayser mechanism still establishes including the cover the cutting ferrule on the working shaft, the cutting ferrule includes:

the guide groove is used for guiding the connection of the ball and the clamping groove; and

a spring sleeved on the working shaft and used for fixing the cutting sleeve,

at least one part of the working shaft is sleeved on the clamping groove shaft, and the ball is arranged on the working shaft sleeved on the clamping groove shaft.

6. The two-stroke cylinder according to claim 1, further comprising:

the first air hole is communicated with the first air chamber and is used for air intake and/or air exhaust of the first air chamber;

the second air hole is communicated with the second air chamber and is used for air intake and/or air exhaust of the second air chamber; and

a fourth air hole communicated with the fourth air chamber and used for air intake and/or exhaust of the fourth air chamber,

the air enters the fourth air chamber through the fourth air hole and drives the sleeve piston to drive the working piston and the working shaft to move, so that the working shaft is connected with the clamping groove shaft;

gas enters the second air chamber through the second air hole and drives the working shaft to move along a first direction;

and gas enters the first air chamber through the first air hole and drives the working shaft to move along the direction opposite to the first direction.

7. The two-stroke cylinder according to claim 6, further comprising:

the fifth air hole is communicated with the fifth air chamber and is used for air intake and/or air exhaust of the fifth air chamber; and

a sixth air hole communicated with the sixth air chamber and used for air intake and/or exhaust of the sixth air chamber,

wherein gas enters the sixth gas chamber through the sixth gas hole to drive the pressurizing piston and the chuck groove shaft to move along the first direction and drive the chuck groove shaft and the working shaft to move under the condition that the chuck groove shaft and the working shaft are connected;

gas enters the fifth air chamber through the fifth air hole to drive the pressurizing piston and the clamping groove shaft to move along the reverse direction of the first direction, and the clamping groove shaft and the working shaft are driven to move under the condition that the clamping groove shaft and the working shaft are connected;

when the fifth air chamber is at the position with the maximum volume, air enters the first air chamber through the first air hole and drives the working piston and the working shaft to move, so that the working shaft is separated from the clamping groove shaft.

8. A two-stroke cylinder according to claim 1, wherein the diameter of the working cylinder is less than or equal to the diameter of the pre-stroke cylinder; and/or the diameter of the working piston is less than or equal to the diameter of the sleeve piston;

the diameter of the pre-stroke cylinder barrel is smaller than that of the pressurizing cylinder barrel; and/or the diameter of the sleeve piston is smaller than the diameter of the pressurizing piston.

9. The dual stroke cylinder of claim 1 wherein one end of said working shaft is provided with a slot; one end of the clamping groove shaft is movably arranged in the groove;

and a ventilation pipeline is arranged on the clamping groove shaft, and the ventilation pipeline is respectively communicated with the groove and the first air chamber and is used for the circulation of air.

10. The dual stroke cylinder of claim 1, wherein the dual stroke cylinder comprises an initial station, a pre-stroke station, and a work station;

when the double-stroke cylinder is positioned at the initial station, the first air chamber and the fifth air chamber are positioned at the positions with the largest volume, and the second air chamber, the fourth air chamber and the sixth air chamber are positioned at the positions with the smallest volume;

when the double-stroke cylinder is positioned at the pre-stroke station, the fourth air chamber is positioned at the position with the largest volume, the fifth air chamber is positioned at the position with the largest volume, and the working shaft is connected with the clamping groove shaft through the clamping mechanism;

when the double-stroke cylinder is positioned at the working station, the first air chamber and the fifth air chamber are positioned at the positions with the minimum volume, and the second air chamber, the fourth air chamber and the sixth air chamber are positioned at the positions with the maximum volume.