Air cylinder for electric resistance welding equipment

Abstract

The utility model relates to the technical field of welding, in particular to an air cylinder for resistance welding equipment, which comprises an outer cylinder barrel component, an inner cylinder barrel component and an inner piston push rod component. The outer cylinder barrel assembly comprises an outer cylinder barrel, a rear end cover is installed at the rear end of the outer cylinder barrel, an air cylinder installation plate is installed on one side of the rear end cover, and the inner cylinder barrel assembly comprises an inner cylinder barrel, an inner cylinder barrel end cover and a front end cover. An inner cylinder barrel end cover is installed at one end of the inner cylinder barrel, the other end of the inner cylinder barrel is connected with a front end cover, after the front end cover is pressed into the inner cylinder barrel, the inner piston push rod assembly comprises a piston ring, a piston rod and a nut pressing block, one end of the piston rod is inserted into the rear end cover and fixedly connected with the outer cylinder barrel assembly through a second inner hexagon screw, and the other end of the piston rod is connected with the piston ring. The piston ring is installed on the piston rod and fixed through the nut pressing block. The output pressure of the cylinder is effectively improved, the overall size is reduced, and the structure is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a cylinder used for resistance welding equipment. Background Art

[0002] In the current field of resistance welding technology, the single-stroke pressurized cylinder structure is mainly used. Figure 1 As shown in the figure, the existing single-stroke pressurized cylinder structure generally uses two identical cylinder barrels. When the cylinder is in operation, compressed air enters the cylinder barrel 7 through holes 1 and 4 simultaneously, pushing pistons 2 and 5 forward to complete the welding action. After welding is completed, compressed air enters through holes 3 and 6 simultaneously, pushing pistons 2 and 5 back. The cylinder has the following problems: to meet a certain welding pressure, the cylinder adopts a pressurized structure and the opening stroke is large, which increases the total length of the cylinder. This makes the overall length of the equipment too long, resulting in a larger overall volume, which is not conducive to installation and increases manufacturing costs.

[0003] Therefore, in view of the above-mentioned problems, the present technical solution proposes a cylinder for resistance welding equipment. Utility Model Content

[0004] The purpose of the present utility model is to provide a cylinder for resistance welding equipment to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cylinder for resistance welding equipment, comprising an outer cylinder assembly, an inner cylinder assembly and an inner piston push rod assembly; the outer cylinder assembly includes an outer cylinder, a rear end portion of the outer cylinder is provided with a rear end cover, a cylinder mounting plate is installed on one side of the rear end cover and is fixed by a spring retaining ring, the inner cylinder assembly includes an inner cylinder, an inner cylinder end cover and a front end cover; an inner cylinder end cover is installed at one end of the inner cylinder, and the inner cylinder end cover is fixed in the inner cylinder by two spring retaining rings 2, the other end of the inner cylinder is connected to the front end cover, and after the front end cover is pressed into the inner cylinder, it is connected and fixed with it by an inner hexagonal screw; the inner piston push rod assembly includes a piston ring, a piston rod, and a nut pressing block, one end of the piston rod is inserted into the rear end cover and is connected and fixed to the outer cylinder assembly by an inner hexagonal screw 2, and a piston ring is installed at the other end of the piston rod, which is installed on the piston rod and fixed by a nut pressing block.

[0006] Compared with the existing technology, the beneficial effect of the present invention is: by fixing the piston push rod assembly on the outer cylinder assembly, the piston push rod assembly and the outer cylinder assembly remain stationary during the operation of the cylinder, and compressed air under the same air pressure acts on the two chambers at the same time, the contact area is increased, and while ensuring a certain cylinder length, the cylinder output pressure becomes larger, meeting the welding requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural diagram of an existing cylinder;

[0008] Figure 2 This is a partially cutaway three-dimensional structural diagram of the interior of the cylinder of the present invention;

[0009] Figure 3 This is a schematic diagram of the internal structure of the cylinder of the present invention from the left side;

[0010] Figure 4 This is a schematic diagram of the right side structure of the cylinder of the present invention;

[0011] Figure 5 This is a schematic diagram of the partial front view of the internal structure of the cylinder of the present invention;

[0012] Figure 6 This is a schematic diagram of the internal structure of the cylinder according to the present invention;

[0013] Among them: cylinder mounting plate 10, hexagon socket screw 11, hexagon socket screw 2 12, O-ring 6 13, rear end cover 15, spring retaining ring 16, O-ring 5 17, O-ring 1 18, O-ring 2 19, wear ring 1 20, dust ring 21, inner cylinder 22, outer cylinder 23, piston ring 24, wear ring 2 25, O-ring 7 26, guide key 27, pressure block 28, washer 29, round head hexagon socket screw 30, dust protection cover 31, front end cover 32 , plug 33, nut pressing block 34, O-ring four 35, piston rod 37, inner cylinder end cover 38, wear-resistant ring three 39, O-ring eight 40, O-ring three 41, spring retaining ring two 42, hexagon socket countersunk screw 43, hexagon socket screw 44, anti-rotation guide groove 99, external air inlet one 101, internal air inlet hole one 102, chamber two 103, chamber one 104, external air inlet two 111, internal air inlet hole two 112, internal air inlet hole three 113, chamber three 114. DETAILED DESCRIPTION

[0014] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0016] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0017] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0018] See also Figures 1-4 , a cylinder for resistance welding equipment, including an outer cylinder assembly, an inner cylinder assembly and an inner piston push rod assembly; the outer cylinder assembly includes an outer cylinder 23, a rear end cover 15 is installed at the rear end of the outer cylinder 23, a cylinder mounting plate 10 is installed on one side of the rear end cover 15, and is fixed by a spring retaining ring 16, the inner cylinder assembly includes an inner cylinder 22, an inner cylinder end cover 38, and a front end cover 32; an inner cylinder end cover 38 is installed at one end of the inner cylinder 22, and the inner cylinder end cover 38 is fixed by two spring retaining rings 42 respectively. It is fixed in the inner cylinder 22, and the other end of the inner cylinder 22 is connected to the front end cover 32. After the front end cover 32 is pressed into the inner cylinder 22, it is connected and fixed thereto by an inner hexagonal screw 44; the inner piston push rod assembly includes a piston ring 24, a piston rod 37, and a nut pressing block 34. One end of the piston rod 37 is inserted into the rear end cover 15 and is connected and fixed to the outer cylinder assembly by an inner hexagonal screw 12. The other end of the piston rod 37 is installed with a piston ring 24, which is installed on the piston rod 37 and fixed by a nut pressing block 34.

[0019] In the embodiment of the present invention, the cylinder is special in that the piston rod 37 is provided with an inner air inlet hole 102, an inner air inlet hole 2 112 and an inner air inlet hole 3 113 in sequence. To seal the process holes, a plug 33 is installed on one end of the piston rod 37.

[0020] An outer air inlet 101 and an outer air inlet 2 111 are formed on the circumferential outer wall of the outer cylinder 23 near the rear end cover 15. The inner end of the outer air inlet 101 is connected to the chamber 104. One side of the chamber 104 is connected to the chamber 2 103 via the inner air inlet 102. The outer air inlet 2 111 is connected to the inner air inlet 2 112. One side of the inner air inlet 2 112 is connected to the inner air inlet 3 113. The end of the inner air inlet 3 113 is connected to the chamber 3 114. External air is introduced into the inner cylinder 22 through the outer air inlet 101 and the outer air inlet 2 111.

[0021] The rear end cover 15 is fixed to the inside of the outer cylinder 23 by a hexagon socket countersunk screw 43, and an O-ring 18 is installed on the rear end cover 15 for sealing; a slot is provided on the cylinder mounting plate 10, and a hexagon socket screw 11 is connected to the inner thread of the slot, and is fastened to the rear end cover 15 by tightening the hexagon socket screw 11.

[0022] Specifically, an O-ring 21 for sealing, a wear-resistant ring 20 for guiding and wear-resistance, and a dustproof ring 21 for scraping and dustproofing are installed on the outside of the inner cylinder 22.

[0023] Specifically, an O-ring three 41 is installed between the inner cylinder end cover 38 and the inner cylinder 22, and an O-ring four 35 is installed between the front end cover 32 and the inner cylinder 22.

[0024] Specifically, an O-ring five 17 and an O-ring six 13 are respectively installed on the piston rod 37 and the rear end cover 15 for sealing.

[0025] Specifically, the outer side of the piston ring 24 is installed with an O-ring 7 26 and a wear-resistant ring 25; the inner ring of the inner cylinder end cover 38 is installed with an O-ring 8 40 and a wear-resistant ring 39, which can play a sealing and guiding wear-resistant role during the forward movement of the inner cylinder assembly.

[0026] In one embodiment of the present invention, the cylinder also has an anti-rotation guide function, a guide key 27 is provided between the outer cylinder 23 and the inner cylinder 22, an anti-rotation guide groove 99 is provided on the inner cylinder 22, and a pressure block 28 is connected to the outside of the guide key 27. The pressure block 28 is fixed to the outer cylinder 23 by a round head hexagon socket screw 30. A washer 29 is provided under the round head hexagon socket screw 30. The guide key 27 prevents the inner cylinder assembly from rotating during movement.

[0027] As a preferred embodiment of the present invention, a dust protection cover 31 is installed on the front end cover 32 to prevent welding slag from entering the interior of the cylinder during welding.

[0028] The working principle of the present invention is: in the idle part of the device, all the driving parts mentioned above, which refer to power elements, electrical components and adapted power supplies, are connected through wires, and the electrical connections are completed in a sequential working order between the electrical components. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control. During welding, compressed air enters the internal chamber 104 of the cylinder from the external air inlet 101, and reaches the chamber 2 103 through the air inlet 102. The compressed air acts on the inner cylinder 22 and the front cover 32 at the same time, pushing the inner cylinder assembly forward for welding; after welding is completed, the compressed air enters from the external air inlet 2 111, and reaches the chamber 3 114 through the air inlet 2 112 and the air inlet 3 113, acting on the inner cylinder assembly to return the cylinder to its initial position.

[0029] Optionally, the shape of the connection and fixation between the cylinder and the welding equipment is not limited to the existing design of the cylinder mounting plate 10 and the front end cover 32 .

[0030] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A cylinder for resistance welding equipment, characterized in that: The invention comprises an outer cylinder assembly, an inner cylinder assembly and an inner piston push rod assembly; the outer cylinder assembly comprises an outer cylinder (23), a rear end cover (15) is installed at the rear end of the outer cylinder (23), a cylinder mounting plate (10) is installed on one side of the rear end cover (15), and is fixed by a spring retaining ring (16); the inner cylinder assembly comprises an inner cylinder (22), an inner cylinder end cover (38), and a front end cover (32); an inner cylinder end cover (38) is installed at one end of the inner cylinder (22), and the inner cylinder end cover (38) is respectively connected by two The second spring retaining ring (42) is fixed in the inner cylinder (22), and the other end of the inner cylinder (22) is connected to the front end cover (32). The inner piston push rod assembly includes a piston ring (24), a piston rod (37), and a nut pressing block (34). One end of the piston rod (37) is inserted into the rear end cover (15) and is connected and fixed to the outer cylinder assembly by the second hexagon socket screw (12). The other end of the piston rod (37) is installed and connected with the piston ring (24), and the piston ring (24) is installed on the piston rod (37) and fixed by the nut pressing block (34).

2. A cylinder for resistance welding equipment according to claim 1, characterized in that: The piston rod (37) is provided with an inner air inlet hole 1 (102), an inner air inlet hole 2 (112) and an inner air inlet hole 3 (113) in sequence, and a plug (33) is installed on a push rod at one end of the piston rod (37).

3. A cylinder for resistance welding equipment according to claim 2, characterized in that: An outer air inlet 1 (101) and an outer air inlet 2 (111) are provided on the circumferential outer wall of the outer cylinder (23) near the rear end cover (15). The inner end of the outer air inlet 1 (101) is connected to the chamber 1 (104). One side of the chamber 1 (104) is connected to the chamber 2 (103) through the inner air inlet 1 (102). The outer air inlet 2 (111) is connected to the inner air inlet 2 (112). One side of the inner air inlet 2 (112) is connected to the inner air inlet 3 (113). The end of the inner air inlet 3 (113) is connected to the chamber 3 (114).

4. A cylinder for resistance welding equipment according to claim 3, characterized in that: The rear end cover (15) is fixed to the inside of the outer cylinder (23) by means of a hexagon socket countersunk screw (43), and a slot is provided on the cylinder mounting plate (10), and a hexagon socket screw (11) is connected to the inner thread of the slot.

5. The cylinder for resistance welding equipment according to claim 4, characterized in that: The outer side of the inner cylinder (22) is provided with an O-ring 2 (19) for sealing, a wear-resistant ring 1 (20) for guiding wear resistance, and a dustproof ring (21) for scraping and dust prevention.

6. The cylinder for resistance welding equipment according to claim 5, characterized in that: An O-ring three (41) is installed between the inner cylinder end cover (38) and the inner cylinder (22), and an O-ring four (35) is installed between the front end cover (32) and the inner cylinder (22).

7. A cylinder for resistance welding equipment according to claim 6, characterized in that: The piston rod (37) and the rear end cover (15) are respectively mounted with an O-ring five (17) and an O-ring six (13).

8. The cylinder for resistance welding equipment according to claim 7, characterized in that: The outer side of the piston ring (24) is installed with an O-ring seven (26) and a wear-resistant ring two (25); the inner ring of the inner cylinder end cover (38) is installed with an O-ring eight (40) and a wear-resistant ring three (39).

9. The cylinder for resistance welding equipment according to claim 8, characterized in that: A guide key (27) is provided between the outer cylinder (23) and the inner cylinder (22), an anti-rotation guide groove (99) is provided on the inner cylinder (22), a pressure block (28) is connected to the outer side of the guide key (27), and the pressure block (28) is fixed to the outer cylinder (23) by a round head hexagon socket screw (30), and a washer (29) is provided below the round head hexagon socket screw (30).

10. The cylinder for resistance welding equipment according to claim 9, characterized in that: A dustproof protective cover (31) is installed on the front end cover (32).

Images