阅读说明：本技术 双行程小体积大压力的一体化专用推缸 (Double-stroke small-volume large-pressure integrated special push cylinder ) 是由 何金树 杨伟国 张玉朋 左安邦 王顺鹏 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种双行程小体积大压力的一体化专用推缸,包括主轴、主轴活塞、两级行程和锁紧导向机构,两级行程包括工作行程和辅助行程,前端盖上设有第一气孔,辅助后端盖上设有第二气孔和第三气孔,末端盖上设有第四气孔,锁紧导向机构设置在工作行程和辅助行程之间,锁紧导向机构包括锁紧套、锁紧轴、锁紧圆珠套、锁紧导向体和钢珠。本发明的目的是提供一种双行程小体积大压力的一体化专用推缸,通过设置锁紧机构把气缸的辅助行程和工作行程分开,互不影响,使得工作行程很小,并且再串联多个工作行程气室也不影响气缸的总体长度,大大减小了气缸体积并能输出较大压力。(The invention discloses a double-stroke small-volume large-pressure integrated special push cylinder which comprises a main shaft, a main shaft piston, a two-stage stroke and a locking guide mechanism, wherein the two-stage stroke comprises a working stroke and an auxiliary stroke, a first air hole is formed in a front end cover, a second air hole and a third air hole are formed in an auxiliary rear end cover, a fourth air hole is formed in a tail end cover, the locking guide mechanism is arranged between the working stroke and the auxiliary stroke, and the locking guide mechanism comprises a locking sleeve, a locking shaft, a locking ball sleeve, a locking guide body and a steel ball. The invention aims to provide a double-stroke small-volume large-pressure integrated special push cylinder, which separates the auxiliary stroke and the working stroke of a cylinder by arranging a locking mechanism without influencing each other, so that the working stroke is very small, and the total length of the cylinder is not influenced by connecting a plurality of working stroke air chambers in series, thereby greatly reducing the volume of the cylinder and outputting large pressure.)

1. The double-stroke small-volume large-pressure integrated special push cylinder is characterized by comprising a main shaft, a main shaft piston, a two-stage stroke and a locking guide mechanism, wherein the two-stage stroke comprises a working stroke and an auxiliary stroke which are independent from each other, the working stroke comprises a working stroke cylinder I, a working stroke cylinder II, a working small shaft, a front end cover, an end cover I, an end cover II and a tail end cover, the auxiliary stroke comprises an auxiliary stroke cylinder and an auxiliary rear end cover, the working stroke cylinder I is blocked by the auxiliary rear end cover and the end cover I, the working stroke cylinder II is blocked by the end cover I and the tail end cover, the working stroke cylinder I and the working stroke cylinder II are coaxially connected in series, a first air hole is formed in the front end cover, a second air hole and a third air hole are formed in the auxiliary rear end cover, and a fourth air hole is formed in the tail end cover, the auxiliary stroke cylinder barrel is blocked by the front end cover and the auxiliary rear end cover, the locking guide mechanism is arranged between the working stroke and the auxiliary stroke and comprises a locking sleeve, a locking shaft, a locking ball sleeve, a locking guide body and a steel ball, the locking sleeve is sleeved on the outer side of the other end of the locking shaft, the locking ball sleeve and the locking guide body are sleeved on the outer side of the main shaft, the locking shaft is sleeved on the outer side of the locking ball sleeve, and the steel ball is located between the locking ball sleeve and the locking guide body.

2. The dual-stroke small-volume large-pressure integrated special push cylinder as claimed in claim 1, wherein the working stroke further comprises a main shaft auxiliary piston, and the main shaft auxiliary piston is positioned between the two end covers II and sleeved outside the working small shaft.

3. The integrated special push cylinder with double strokes, small volume and large pressure as claimed in claim 2, wherein an O-shaped ring is arranged at the joint of the main shaft auxiliary piston and the working small shaft, and the O-shaped ring is made of rubber.

4. The dual-stroke small-volume large-pressure integrated special pushing cylinder as claimed in claim 1, wherein the front end cover, the auxiliary stroke cylinder barrel, the auxiliary rear end cover, the working stroke cylinder barrel I, the working stroke cylinder barrel II, the end cover I, the end cover II and the end cover are connected through a pull rod bolt, and a gasket is arranged between the bolt and the end cover.

5. The dual-stroke small-volume large-pressure integrated special push cylinder as claimed in claim 1, wherein the first air hole is provided at one side of the front end cap, the second air hole and the third air hole are respectively provided at two sides of the auxiliary rear end cap, and the fourth air hole is provided at one side of the end cap.

Technical Field

The invention relates to the technical field of cylinders, in particular to a double-stroke small-volume large-pressure integrated special push cylinder.

Background

With the development of automobile manufacturing industry, the volume and output pressure of an integrated welding tongs in resistance welding have higher requirements, and the ergonomics of the integrated welding tongs are emphasized. The size of the outer shape of the cylinder element is directly influenced on the whole size and weight of the whole welding machine, and the operability of the welding tongs is directly influenced. Moreover, the requirement on welding pressure is relatively high at present, and in order to realize the output of relatively high pressure by the cylinder, two ways are generally adopted: under the condition of not increasing air pressure (the air pressure of an air source of a related automobile manufacturer at the present stage is generally about 0.5 MPa), the stress area of a cylinder piston is increased, namely the diameter of a cylinder barrel is increased; and secondly, under the condition of not increasing the stress area of the piston, the multi-section air cylinders are connected in series. However, the two modes greatly increase the overall volume of the air cylinder, directly affect the size and weight of the whole machine and have poor operability.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a dual-stroke small-volume large-pressure integrated special cylinder, which separates the auxiliary stroke and the working stroke of the cylinder by arranging a locking mechanism without affecting each other, so that the working stroke is small, and the total length of the cylinder is not affected by connecting a plurality of working stroke air chambers in series, so that the volume of the cylinder is greatly reduced, and large pressure can be output.

The technical scheme adopted by the invention for solving the technical problems is as follows: a double-stroke small-volume large-pressure integrated special push cylinder comprises a main shaft, a main shaft piston, a two-stage stroke and a locking guide mechanism, wherein the two-stage stroke comprises a working stroke and an auxiliary stroke, the working stroke and the auxiliary stroke are independent, the working stroke comprises a working stroke cylinder I, a working stroke cylinder II, a working small shaft, a front end cover, an end cover I, an end cover II and a tail end cover, the auxiliary stroke comprises an auxiliary stroke cylinder and an auxiliary rear end cover, the working stroke cylinder I is blocked by the auxiliary rear end cover and the end cover I, the working stroke cylinder II is blocked by the end cover I and the tail end cover, the working stroke cylinder I and the working stroke cylinder II are coaxially connected in series, a first air hole is formed in the front end cover, a second air hole and a third air hole are formed in the auxiliary rear end cover, a fourth air hole is formed in the tail end cover, and the auxiliary stroke is blocked by the front end cover and the, the locking guide mechanism is arranged between the working stroke and the auxiliary stroke and comprises a locking sleeve, a locking shaft, a locking ball sleeve, a locking guide body and a steel ball, the locking sleeve is sleeved on the outer side of the other end of the locking shaft, the locking ball sleeve and the locking guide body are sleeved on the outer side of the main shaft, the locking shaft is sleeved on the outer side of the locking ball sleeve, and the steel ball is arranged between the locking ball sleeve and the locking guide body.

Furthermore, the working stroke further comprises a main shaft auxiliary piston, and the main shaft auxiliary piston is located between the two end covers II and sleeved on the outer side of the working small shaft.

Furthermore, an O-shaped ring is arranged at the joint of the main shaft auxiliary piston and the working small shaft, and the O-shaped ring is made of rubber.

Furthermore, the front end cover, the auxiliary stroke cylinder barrel, the auxiliary rear end cover, the working stroke cylinder barrel I, the working stroke cylinder barrel II, the end cover I, the end cover II and the tail end cover are connected through pull rod bolts, and a gasket is arranged between the bolts and the tail end cover.

Further, the first air hole is formed in one side of the front end cover, the second air hole and the third air hole are formed in two sides of the auxiliary rear end cover respectively, and the fourth air hole is formed in one side of the tail end cover.

The invention has the advantages that:

the double-stroke integrated push cylinder is characterized in that a locking guide mechanism is arranged between two stages of strokes, namely a working stroke and an auxiliary stroke, the locking guide mechanism comprises a locking sleeve, a locking shaft, a locking ball sleeve, a locking guide body and a steel ball, the auxiliary stroke and the working stroke are separated by the locking guide mechanism, so that the length of a working cylinder barrel is shortened, the volume of the cylinder is reduced, the number of working cylinder chambers can be increased or reduced according to the welding pressure, pressurization or depressurization is realized, the structure is quite simple, the processing and assembly are easy, errors are not easy, the maintenance is easy, the working stroke and the auxiliary stroke of the push cylinder are independent, the matching of different stroke combinations can be formed, the adjustment of different welding strokes of a welding clamp is realized, and the replacement is very convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of the structure of the present invention (the working stroke and the auxiliary stroke are both open).

Fig. 2 is a schematic structural view of the working stroke open and auxiliary stroke closed states of the present invention.

Fig. 3 is a schematic view of the welding state of the present invention (the working stroke and the auxiliary stroke are both closed states).

Wherein:

1. a main shaft; 2. a spindle piston; 3. an auxiliary stroke cylinder; 4. an auxiliary rear end cap; 5. a working stroke cylinder barrel I; 6. a working stroke cylinder barrel II; 7. a working small shaft; 8. a front end cover; 9. an end cover I; 10. an end cover II; 11. a tip cap; 12. a locking sleeve; 13. a locking shaft; 14. locking the ball sleeve; 15. locking the guide body; 16. steel balls; 17. a main shaft auxiliary piston; 18. an O-shaped ring; 19. a gasket; A. a first air hole; B. a second air hole; C. a third air hole; D. a fourth air hole;

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the double-stroke small-volume large-pressure integrated special push cylinder comprises a main shaft 1, a main shaft piston 2, a two-stage stroke and a locking guide mechanism, wherein the two-stage stroke comprises a working stroke and an auxiliary stroke, the working stroke and the auxiliary stroke are independent, the working stroke comprises a working stroke cylinder I5, a working stroke cylinder II 6, a working small shaft 7, a front end cover 8, an end cover I9, an end cover II 10 and a tail end cover 11, the auxiliary stroke comprises an auxiliary stroke cylinder 3 and an auxiliary rear end cover 4, the working stroke cylinder I5 is blocked by the auxiliary rear end cover 4 and the end cover I9, the working stroke cylinder II 6 is blocked by the end cover I9 and the tail end cover 11, the working stroke cylinder II 6 is coaxially connected in series through a plurality of end covers II 10, the working stroke cylinder I5 and the working stroke cylinder II 6 are coaxially connected in series, a first air hole A is arranged on the front end cover 8, specifically, the first air hole a is arranged on one side of the front end cover 8, the auxiliary rear end cover 4 is provided with a second air hole B and a third air hole C, specifically, the second air hole B and the third air hole C are respectively arranged on two sides of the auxiliary rear end cover 4, the end cover 11 is provided with a fourth air hole D, specifically, the fourth air hole D is arranged on one side of the end cover 11, the auxiliary stroke cylinder 3 is blocked by the front end cover 8 and the auxiliary rear end cover 4, the locking guide mechanism is arranged between a working stroke and an auxiliary stroke, the locking guide mechanism comprises a locking sleeve 12, a locking shaft 13, a locking ball sleeve 14, a locking guide body 15 and a steel ball 16, the locking sleeve 12 is sleeved on the outer side of the other end of the locking shaft 13, the locking ball sleeve 14 and the locking guide body 15 are sleeved on the outer side of the main shaft 1, the locking shaft 13 is sleeved on the outer side of the locking ball sleeve 14, the steel ball 16 is located between the locking ball sleeve 14 and the locking guide body 15, and the steel ball 16 can move along the locking guide body 15 in the locking ball sleeve 14.

In this embodiment, the working stroke further includes a main shaft auxiliary piston 17, the main shaft auxiliary piston 17 is located between the end cover I9 and the end cover II 10, between the two end covers II 10, between the end cover II 10 and the end cover 11, and is all sleeved on the outer side of the working small shaft 7, an O-shaped ring 18 is arranged at the joint of the main shaft auxiliary piston 17 and the working small shaft 7, and the O-shaped ring 18 is made of rubber.

In this embodiment, the front end cover 8, the auxiliary stroke cylinder 3, the auxiliary rear end cover 4, the working stroke cylinder i 5, the working stroke cylinder ii 6, the end cover i 9, the end cover ii 10, and the end cover 11 are connected by a pull rod bolt, and a washer 19 is disposed between the bolt and the end cover 11.

The working mode is as follows:

the specific working process is as follows:

as shown in fig. 1, fig. 1 shows a state that the working stroke and the auxiliary stroke of the double-stroke cylinder are both opened, that is, the initial position of the double-stroke cylinder, the front end of the welding tongs is fixed, the third air hole C is kept to be ventilated, simultaneously, the second air hole B is ventilated, the first air hole a is ventilated, due to the reaction force of the locking sleeve 12, the locking sleeve 12 moves along the locking guide body 15 in the locking ball sleeve 14 through the steel ball 16, and further the whole cylinder is pushed to move rightwards, and the position shown in fig. 2 is reached, fig. 2 shows a state that the working stroke of the double-stroke cylinder is opened and the auxiliary stroke is closed, the front end of the welding tongs is fixed, at this moment, the third air hole C is kept to be ventilated, simultaneously, the first air hole a is ventilated, due to the reaction force of the locking sleeve 12, the whole cylinder is pushed to move forwards, that is moved leftwards, and finally, the position, the first air hole A continuously keeps ventilation, meanwhile, the fourth air hole D ventilates, and the third air hole C exhausts air, so that the auxiliary piston of the rear main shaft 1 pushes the main shaft piston 2 to move forwards, namely to move leftwards, the purpose of pressurization is realized, and the cylinder is in a welding state and is welded.

The double-stroke integrated push cylinder is characterized in that a locking guide mechanism is arranged between two stages of strokes, namely a working stroke and an auxiliary stroke, the locking guide mechanism comprises a locking sleeve, a locking shaft, a locking ball sleeve, a locking guide body and a steel ball, the auxiliary stroke and the working stroke are separated by the locking guide mechanism, so that the length of a working cylinder barrel is shortened, the volume of the cylinder is reduced, the number of working cylinder chambers can be increased or reduced according to the welding pressure, pressurization or depressurization is realized, the structure is quite simple, the processing and assembly are easy, errors are not easy, the maintenance is easy, the working stroke and the auxiliary stroke of the push cylinder are independent, the matching of different stroke combinations can be formed, the adjustment of different welding strokes of a welding clamp is realized, and the replacement is very convenient.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.