阅读说明：本技术 嵌套式双输出气缸 (Nested double-output cylinder ) 是由 李磊 陶红 江松林 王涛 朱鸿雁 于 2020-12-10 设计创作，主要内容包括：本发明公开一种嵌套式双输出气缸,包括第一气缸本体和第二气缸本体,所述第一气缸本体包括第一缸体和第一活塞；所述第一缸体固定连接支撑座,所述第一活塞同轴穿设于所述第一缸体内、且能够直线运动；所述第一活塞内中空设置,所述第二气缸本体设置在所述第一活塞内、且固定连接所述支撑座。本发明的双输出气缸,第一活塞中空设置,其中空的内部形成容纳第二气缸本体的空腔,使得第二气缸本体和第一气缸本体分别内、外嵌套设置,适合在压装内外设置的两种零件的工况下使用,压装可靠,压装灵活度高,不需要更换定制端头,同时第一气缸本体和第二气缸本体能够各自独立运动,实现内外设置的两种零件都压装到位,并支持同步压装和异步压装两种模式。(The invention discloses a nested double-output cylinder which comprises a first cylinder body and a second cylinder body, wherein the first cylinder body comprises a first cylinder body and a first piston; the first cylinder body is fixedly connected with the supporting seat, and the first piston coaxially penetrates through the first cylinder body and can linearly move; the first piston is arranged in a hollow mode, and the second cylinder body is arranged in the first piston and fixedly connected with the supporting seat. According to the double-output air cylinder, the first piston is arranged in a hollow mode, the hollow interior of the first piston is provided with the cavity for accommodating the second air cylinder body, so that the second air cylinder body and the first air cylinder body are respectively arranged in an inner embedding mode and an outer embedding mode, the double-output air cylinder is suitable for being used under the working condition of press mounting of two parts arranged inside and outside, press mounting is reliable, press mounting flexibility is high, custom ends do not need to be replaced, the first air cylinder body and the second air cylinder body can independently move, the two parts arranged inside and outside can be pressed in place, and two modes of synchronous press mounting and asynchronous press mounting are supported.)

1. The utility model provides a nested formula dual output cylinder which characterized in that: the cylinder comprises a first cylinder body and a second cylinder body, wherein the first cylinder body comprises a first cylinder body and a first piston; the first cylinder body is fixedly connected with the supporting seat, and the first piston coaxially penetrates through the first cylinder body and can linearly move; the first piston is arranged in a hollow mode, and the second cylinder body is arranged in the first piston and fixedly connected with the supporting seat.

2. The nested dual output cylinder of claim 1, wherein: the second cylinder body and the first cylinder body are respectively arranged in an inner and outer coaxial nested manner.

3. The nested dual output cylinder of claim 1 or 2, wherein: the second cylinder body comprises a second cylinder body and a second piston, and the second cylinder body axially penetrates through the first piston and is fixedly connected with the supporting seat; the second cylinder is hollow, and the second piston is arranged in the second cylinder and can move linearly.

4. The nested dual output cylinder of claim 3, wherein: the supporting seat comprises a first supporting seat and a second supporting seat which are oppositely arranged, and two ends of the first cylinder body are respectively and fixedly connected with the first supporting seat and the second supporting seat; the first supporting seat is provided with a first outer cylinder air hole, the first cylinder body is positioned on the wall of the first cylinder body close to the second supporting seat and is provided with a second outer cylinder air hole, and an air source for driving the first piston to do linear motion in the first cylinder body is communicated with the first cylinder body through the first outer cylinder air hole or the second outer cylinder air hole.

5. The nested dual output cylinder of claim 4, wherein: the first piston comprises a piston body and a piston rod, an oil seal sealing element is arranged between the piston body of the first piston and the outer wall of the second cylinder body, an oil seal sealing element is arranged between the piston rod of the first piston and the inner wall of the first cylinder body, and dynamic sealing is achieved through the oil seal sealing element when the first piston moves.

6. The nested dual output cylinder of claim 4, wherein: the junction of first cylinder body and first supporting seat is equipped with the sealing washer, through static seal is realized to the sealing washer.

7. The nested dual output cylinder of claim 4, wherein: the one end fixed connection of second cylinder body first supporting seat, be equipped with first inner cylinder gas pocket on the first supporting seat, the second cylinder position is in its keeping away from the one end of first supporting seat is equipped with second inner cylinder gas pocket, is used for the drive the air supply of second piston at the internal linear motion of second cylinder passes through first inner cylinder gas pocket or second inner cylinder gas pocket intercommunication the second cylinder body.

8. The nested dual output cylinder of claim 7, wherein: the second piston comprises a piston body and a piston rod, an oil seal sealing element is arranged between the piston body of the second piston and the inner wall of the second cylinder body, an oil seal sealing element is arranged between the piston rod of the second piston and the inner wall of the second cylinder body, and dynamic sealing is achieved when the second piston moves through the oil seal sealing element.

9. The nested dual output cylinder of claim 7, wherein: the side wall of the first piston, which is close to the second supporting seat, is provided with a radial through hole, the radial through hole is communicated with the inside hollow part and the outside of the first piston in the radial direction, an air pipe is arranged in the first piston, and the air pipe is connected with the radial through hole and the second inner cylinder air hole in a sealing manner.

10. The nested dual output cylinder of claim 7, wherein: and a sealing ring is arranged at the joint of the second cylinder body and the first supporting seat, and static sealing is realized through the sealing ring.

Technical Field

The invention relates to the field of cylinders, in particular to a dual-output cylinder which is of a nested structure and independently extends and retracts.

Background

The piston type cylinder is widely applied to equipment as a power output device, the piston is driven by compressed air to move to transmit torque, and the piston type cylinder has the characteristics of stable movement and high action precision. The conventional common cylinders are divided into single-output cylinders and double-output cylinders according to the output quantity, the single-output cylinders are also called single-shaft output cylinders, and a single piston moves in a cylinder body to transfer torque; the double-output cylinder is also called a double-shaft output cylinder, and two pistons respectively move in two cavities to transmit torque.

Under some working conditions that an inner part and an outer part need to be pressed, only one part can be pressed in place at one time by a single-shaft output cylinder which is commonly used at present, the positive pressure of one part needs to be ensured to be in place, a customized double-end pressure head needs to be replaced when the inner part and the outer part are pressed in place, a single piston drives the double-end pressure head to synchronously extend and retract, and the double-end pressure head presses the two parts respectively in the extending and retracting process. The common double-shaft output cylinder can only press two parts arranged in parallel on one hand, and the two pistons can only move synchronously but cannot move independently on the other hand, so that the common double-shaft output cylinder is not suitable for pressing two parts arranged inside and outside.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a nested double-output air cylinder, so that two parts arranged inside and outside are pressed in place, and two modes of synchronous pressing and asynchronous pressing are supported.

In order to solve the technical problem, the invention provides a nested dual-output cylinder, which comprises a first cylinder body and a second cylinder body, wherein the first cylinder body comprises a first cylinder body and a first piston; the first cylinder body is fixedly connected with the supporting seat, and the first piston coaxially penetrates through the first cylinder body and can linearly move; the first piston is arranged in a hollow mode, and the second cylinder body is arranged in the first piston and fixedly connected with the supporting seat.

In a preferred embodiment of the present invention, the second cylinder body and the first cylinder body are coaxially nested inside and outside, respectively.

In a preferred embodiment of the present invention, the second cylinder body further includes a second cylinder body and a second piston, the second cylinder body axially penetrates through the first piston and is fixedly connected to the supporting seat; the second cylinder is hollow, and the second piston is arranged in the second cylinder and can move linearly.

In a preferred embodiment of the present invention, the supporting seat further includes a first supporting seat and a second supporting seat oppositely disposed, and two ends of the first cylinder are respectively and fixedly connected to the first supporting seat and the second supporting seat; the first supporting seat is provided with a first outer cylinder air hole, the first cylinder body is positioned on the wall of the first cylinder body close to the second supporting seat and is provided with a second outer cylinder air hole, and an air source for driving the first piston to do linear motion in the first cylinder body is communicated with the first cylinder body through the first outer cylinder air hole or the second outer cylinder air hole.

In a preferred embodiment of the present invention, the first piston further includes a piston body and a piston rod, an oil seal is disposed between the piston body of the first piston and the outer wall of the second cylinder, and an oil seal is disposed between the piston rod of the first piston and the inner wall of the first cylinder, so that dynamic sealing during movement of the first piston is achieved through the oil seal.

In a preferred embodiment of the present invention, a sealing ring is disposed at a joint of the first cylinder and the first supporting seat, and static sealing is achieved by the sealing ring.

In a preferred embodiment of the present invention, the cylinder further includes a first support base fixedly connected to one end of the second cylinder, the first support base is provided with a first inner cylinder air hole, the second cylinder is provided with a second inner cylinder air hole at an end thereof away from the first support base, and an air source for driving the second piston to move linearly in the second cylinder is communicated with the second cylinder through the first inner cylinder air hole or the second inner cylinder air hole.

In a preferred embodiment of the present invention, the second piston further includes a piston body and a piston rod, an oil seal is disposed between the piston body of the second piston and the inner wall of the second cylinder, and an oil seal is disposed between the piston rod of the second piston and the inner wall of the second cylinder, so that dynamic sealing during movement of the second piston is achieved through the oil seal.

In a preferred embodiment of the present invention, the first piston further includes a radial through hole formed in a side wall of the first piston, the side wall being located near the second support seat, the radial through hole radially communicating with the inside hollow space and the outside of the first piston, and an air pipe disposed in the first piston and hermetically connecting the radial through hole and the second inner cylinder air hole.

In a preferred embodiment of the present invention, a sealing ring is disposed at a joint of the second cylinder and the first supporting seat, and static sealing is achieved by the sealing ring.

The invention has the beneficial effects that:

according to the nested double-output air cylinder, the first piston is arranged in a hollow mode, a cavity for accommodating the second air cylinder body is formed in the hollow interior of the first piston, so that the second air cylinder body and the first air cylinder body are respectively arranged in an inner embedding mode and an outer embedding mode, the nested double-output air cylinder is suitable for being used under the working condition of press fitting of two parts arranged inside and outside, the press fitting is reliable, the press fitting flexibility is high, the customized end head does not need to be replaced, meanwhile, the first air cylinder body and the second air cylinder body can respectively and independently move, the press fitting of the two parts arranged inside and outside is achieved in place, and two modes of synchronous press fitting.

Drawings

Fig. 1 is a schematic structural diagram of a nested double-output cylinder in a preferred embodiment of the invention.

The reference numbers in the figures illustrate:

2-a first cylinder body, 4-a first piston, 6-a first support seat, 8-a second support seat, 10-a second cylinder body, 12-a second piston, 14-a first outer cylinder air hole, 16-a second outer cylinder air hole, 18-a first piston body, 20-a first piston rod, 22-an oil seal sealing element, 24-a sealing ring, 26-a first inner cylinder air hole, 28-a second inner cylinder air hole, 30-a second piston body, 32-a second piston rod, and 34-a radial through hole.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Examples

The embodiment of the invention discloses a nested double-output cylinder, which comprises a first cylinder body and a second cylinder body, wherein the first cylinder body comprises a first cylinder body 2 and a first piston 4; generally, the first cylinder 2 is a cylindrical structure with two open ends, and the interior of the cylinder is hollow; the two ends of the first cylinder body 2 are fixedly connected with supporting seats, the supporting seats form a support of the first cylinder body, and the inside of the first cylinder body 2 is sealed to form a closed air chamber; specifically, the supporting seat comprises a first supporting seat 6 and a second supporting seat 8 which are oppositely arranged, and two ends of the first cylinder body 2 are respectively and fixedly connected with the first supporting seat 6 and the second supporting seat 8; in this embodiment technical scheme, the both ends of first cylinder body 2 can be dismantled through threaded fastener and be fixed to first supporting seat 6 and second supporting seat 8 on, threaded fastener can be for bolt, screw, double-screw bolt, spiral shell axle etc.. The first piston 4 coaxially penetrates through the first cylinder body 2 and can linearly move; it can be understood that, based on the motion principle of the conventional cylinder, the power of the linear motion of the first piston 4 is derived from the gas pressure difference between two air chambers partitioned by the first piston 4, in order to achieve the pressure difference, a first outer cylinder air hole 14 is formed in the first supporting seat 6, a second outer cylinder air hole 16 is formed in the cylinder wall of the first cylinder body 2, which is close to the second supporting seat 8, and an air source for driving the linear motion of the first piston 4 in the first cylinder body 2 is communicated with the first cylinder body 2 through the first outer cylinder air hole 14 or the second outer cylinder air hole 16. For example, when the first piston 4 moves towards the second support seat 8, compressed air enters through the first outer cylinder air hole 14; when the first piston 4 moves towards the first supporting seat 6, compressed air enters through the second outer cylinder air hole 16.

In the technical scheme of this embodiment, the first piston 4 is hollow, and the second cylinder 10 axially penetrates through the first piston 4 and is fixedly connected to the support seat. The first piston 4 is arranged in a hollow mode, and a cavity for accommodating the second cylinder body is formed in the hollow interior of the first piston, so that the second cylinder body and the first cylinder body are respectively arranged in an inner nesting mode and an outer nesting mode. Specifically, the second cylinder body includes a second cylinder block 10 and a second piston 12; generally, the second cylinder 10 is a cylinder with two open ends, and has a hollow interior, and has or forms a flange structure at one end, and the first connecting seat is fixedly connected through the flange structure. In this embodiment, one end of the second cylinder 10 is detachably fixed to the first support base 6 by a threaded fastener, and the threaded fastener may be a bolt, a screw, a stud, a screw shaft, or the like. The second cylinder 10 is hollow, and the second piston 12 coaxially penetrates through the second cylinder 10 and can linearly move; it can be understood that, based on the motion principle of the conventional cylinder, the power of the linear motion of the second piston 12 is derived from the gas pressure difference between two air chambers separated by the second piston 12, in order to achieve the pressure difference, a first inner cylinder air hole 26 is formed in the first supporting seat 6, a second inner cylinder air hole 28 is formed in the end, away from the first supporting seat 6, of the second cylinder 10, and a gas source for driving the linear motion of the second piston 12 in the second cylinder 10 is communicated with the second cylinder 10 through the first inner cylinder air hole 26 or the second inner cylinder air hole 28. For example, when the second piston 12 moves towards the second support seat 8, compressed air enters through the first inner cylinder air hole 26; when the second piston 12 moves towards the first supporting seat 6, compressed air enters through the second inner cylinder air hole 28.

In the technical scheme of this embodiment, the lateral wall that is located its and is close to second supporting seat 8 of first piston 4 is equipped with radial through-hole 34, the inside cavity and the outside of first piston 4 of radial through-hole 34 radial intercommunication, be equipped with the trachea in the first piston 4, the trachea sets up in first piston 4, trachea sealing connection radial through-hole 34 and second inner cylinder gas pocket 28. The compressed air which is accessed from the outside enters through the radial through hole 34, the air pipe and the second inner cylinder air hole 28 in sequence. The radial through hole 34 is arranged on the first piston 4 and moves to change the position along with the first piston 4, and the press fitting does not interfere with a workpiece.

The first piston 4 is arranged in a hollow manner, a cavity for accommodating the second cylinder body is formed in the hollow interior of the first piston, so that the second cylinder body and the first cylinder body are respectively arranged in an inner embedding manner and an outer embedding manner, the press fitting device is suitable for being used under the working condition of press fitting of two parts arranged inside and outside, the press fitting is reliable, the press fitting flexibility is high, a customized end does not need to be replaced, the first cylinder body and the second cylinder body can respectively and independently move, the press fitting of the two parts arranged inside and outside is in place, and two modes of synchronous press fitting and asynchronous press fitting are supported; in the synchronous press-fitting mode, the first piston 4 and the second piston 12 move synchronously; in the asynchronous press-fitting mode, the first piston 4 and the second piston 12 move in sequence.

Furthermore, the second cylinder body and the first cylinder body are coaxially nested inside and outside respectively, and the coaxial arrangement is favorable for reducing the volume of the double-output cylinder.

The first piston 4 comprises a first piston body 18 and a first piston rod 20, an oil seal sealing element 22 is arranged between the first piston body 18 and the outer wall of the second cylinder body 10, an oil seal sealing element 22 is arranged between the first piston rod 20 and the inner wall of the first cylinder body 2, and dynamic sealing when the first piston 4 moves is achieved through the oil seal sealing element 22. And a sealing ring 24 is arranged at the joint of the first cylinder body 2 and the first supporting seat 6, and static sealing is realized through the sealing ring 24. The second piston 12 comprises a second piston body 30 and a second piston rod 32, an oil seal sealing member 22 is arranged between the second piston body 30 and the inner wall of the second cylinder 10, an oil seal sealing member 22 is arranged between the second piston rod 32 and the inner wall of the second cylinder 10, and dynamic sealing when the second piston 12 moves is realized through the oil seal sealing member 22. And a sealing ring 24 is arranged at the joint of the second cylinder body 10 and the first supporting seat 6, and static sealing is realized through the sealing ring 24. The seal ring 24 is preferably an O-ring seal 24, and the oil seal 22 is preferably a lip oil seal 22. Wherein two oil seal seals 22 with different lip directions are installed between the second piston body 30 and the inner wall of the second cylinder 10; two oil seal seals 22 with different lip directions are installed between the first piston rod 20 and the inner wall of the first cylinder 2, and one oil seal 22 is installed between the first piston body 18 and the outer wall of the second cylinder 10.

The nested double-output cylinder can be combined with an electromagnetic valve and other electric controls to realize full-automatic press fitting, and is simple and easy to control.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.