CN220347573U

CN220347573U - Welding clamping cylinder structure

Info

Publication number: CN220347573U
Application number: CN202321651499.3U
Authority: CN
Inventors: 王世忠; 陈早阳; 曹舟; 葛存其; 陈坚华
Original assignee: Ningbo Airtac Automatic Industrial Co ltd
Current assignee: Ningbo Airtac Automatic Industrial Co ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2024-01-16
Anticipated expiration: 2033-06-27

Abstract

The utility model discloses a welding clamping cylinder structure, which improves the running speed of a piston (2) by separating the piston (2) from the inner wall of a cylinder (10), seals the piston through a sealing ring group, takes the piston (2) as an intermediate space in a second chamber (14), separates the piston (2) from the inner wall of the cylinder (10) by setting a support pad (1) at the lower end of the piston (2), solves the problem that the cylinder is easy to fail when the cylinder is not started for a long time again, and has the characteristics of good sealing performance and high moving speed.

Description

Welding clamping cylinder structure

Technical Field

The utility model relates to the technical field of welding clamping cylinders, in particular to a welding clamping cylinder structure.

Background

In the existing welding clamping cylinder, the piston always rubs with the inner wall of the cylinder, so that the tightness is poor, and in order to ensure the reliability of the cylinder, only a new cylinder can be replaced, so that the production cost of a welding part is increased; the piston of the air cylinder is contacted with the surface of the air cylinder, the air cylinder is not used for a long time, the mobility of molecules between materials enables the contact parts of the piston and the air cylinder to be connected together, a thin film with stronger stress is formed, and the air cylinder is difficult to start to operate; meanwhile, when the swing amplitude of the rocker arm is replaced by the existing welding clamping cylinder, the corresponding aluminum pipe length is often intercepted, then the support is replaced, if the support is unsuitable, the corresponding support is required to be manufactured in a re-customized mode, the use experience of workers is poor, the working hours are delayed, the production cost is increased through phase change, and the rocker arm is of an arm-shaped structure for connecting the cylinder and the clamping piece, and is mature and irrelevant to the scheme of the application in the prior art, so that illustration is not made.

One chinese patent publication No. CN214366990U, publication No. 2021, 10 and 08 discloses a clamping cylinder with self-locking function, in which a second pushing block is equivalent to the piston of the present utility model, and a second sealing block is disposed on the second pushing block to increase tightness, but in this solution, the sealing block is in great contact with the inner surface of the cylinder, and at the same time, if not used for a long time, the sealing block is easy to adhere to the surface of the cylinder due to molecular flowability, and forms no small resistance when the cylinder is started.

Disclosure of Invention

The first aim of the utility model is to solve the problems of large friction force between the piston and the cylinder and difficult initial starting of the cylinder in the prior art, and provide a welding clamping cylinder structure, wherein a gap exists between the piston and the cylinder through a sealing ring and a supporting pad, and the welding clamping cylinder structure is well sealed.

The second purpose of the utility model is to solve the problem that a special strut is needed when the swing amplitude of the rocker arm is changed by the cylinder in the prior art, and to provide a strut with threads and self-adjusting and self-locking functions, and the effective length of the strut can be adjusted along with the change of the length of the aluminum tube.

The technical scheme is that the welding clamping cylinder structure comprises a cylinder and a rocker arm, wherein a connecting rod group and a rotating shaft are arranged in the cylinder, one end of the connecting rod is hinged with the rotating shaft, one end of the connecting rod group, which is far away from the rotating shaft, moves in the axial direction of the cylinder, a piston is arranged at one end of the connecting rod group, which is far away from the rotating shaft, and a gap exists between the piston and the inner surface of the cylinder; the bottom of the piston is provided with a supporting pad, and the supporting pad is protruded on the surface of the bottom of the piston; the piston circumference is equipped with the sealing washer group, the sealing washer group closely laminates with the cylinder internal surface. Preferably, the lower end of the piston is provided with a supporting pad, the supporting pad is in a thinner circular ring shape, the center of the supporting pad is arranged on the axis of the piston, the piston is propped against the piston to ensure that the piston rod is never contacted with the inner bottom surface of the cylinder, the situation that the piston and the cylinder are stuck together due to molecular flow is avoided, the initial starting of the cylinder can be smoothly carried out, the whole body of the piston is provided with a thinner sealing ring set, the whole body of the piston is isolated from the inner surface of the cylinder, meanwhile, the sealing ring set is tightly contacted with the inner surface of the cylinder, the second chamber is divided into two spaces by the piston for ventilation, and the piston can control the change of the air pressure of the upper space and the lower space of the piston or the upper space or the lower space of the piston. And the connecting rod group is controlled, so that the aim of controlling the swing of the rocker arm is finally achieved, and meanwhile, as the piston is not in direct contact with the inner surface of the cylinder, the friction force is small, so that the running resistance of the piston is small, and the swing speed of the rocker arm can be higher.

The sealing ring set comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is in a circular ring shape and is clamped on the piston, and a groove is formed in the middle of one surface of the first sealing ring, which is in contact with the cylinder. As the preference, the first sealing washer cross section is equipped with the recess in the position of being in contact with the cylinder inner wall, reciprocates at the piston, and the design of recess can let two upper and lower positions of first sealing washer all form sealedly, and middle recess, means that first sealing washer can accept bigger deformation, and not destroyed internal stress by frictional force, durable, and sealed effectual, the recess still lets first sealing washer can accept bigger deformation, makes the piston can all guarantee the good of sealed effect through the deformation no matter how big speed.

The second sealing ring is circular, the cross section of the second sealing ring is gourd-shaped, a waist-like structure is arranged in the middle of the second sealing ring, and two hollow circular rings are formed on two sides of the waist-like structure and the inner surface of the second sealing ring. Preferably, the second sealing ring is also in a thinner circular ring shape, the first sealing ring is used for forming two sealing rings between the whole piston body and the inner wall of the cylinder, the air pressure between the sealing rings and the first sealing ring can resist deformation caused by friction as much as possible, the inside of the second sealing ring is in a gourd-shaped design, one end of the gourd is tightly attached to the inner wall of the cylinder, the other end of the gourd is clamped with the piston, two gaps are formed between the upper and lower sides of the thinner waist in the middle and the inner surface of the second sealing ring, the gaps form two circular hollow circular rings along the whole circular ring, the second sealing ring moves up and down, the surface provides a tensile force with opposite friction force for the second sealing ring, and the purpose is to protect the waist-like structure from breaking, and the waist-like structure ensures that one end of the second sealing ring close to the inner wall of the cylinder can flexibly deform, but the waist-like structure is tightly attached to the inner wall of the cylinder at any time.

The cylinder is provided with a separation layer, the separation layer is arranged in the middle of the cylinder and divides the inside of the cylinder into an upper part and a lower part, the upper part and the lower part are respectively a first chamber and a second chamber, and the piston is arranged in the second chamber. Preferably, the piston is in the second chamber, dividing the second chamber into two spaces.

The upper end of the separation layer is provided with a first ventilation pipeline which is communicated with the second chamber, and the bottom of the air cylinder is provided with a second ventilation pipeline which is communicated with the second chamber. Preferably, after the piston divides the second chamber into two spaces, the first ventilation pipeline and the second ventilation pipeline are led into the two spaces, and the upper part and the lower part of the piston are simultaneously subjected to pneumatic pressure, so that the movement of the piston is faster, and the swinging speed of the rocker arm is faster.

The lower half part of the cylinder further comprises a support column and an aluminum pipe, the second chamber is the hollow part inside the aluminum pipe, and the piston moves in the aluminum pipe along the axial direction of the aluminum pipe. Preferably, the length of the aluminium tube determines the cylinder stroke L, i.e. the length of the piston stroke in the second chamber, the longer the aluminium tube, the longer the second chamber, and the longer the piston stroke and vice versa. The piston and the rotation shaft are respectively connected to the two ends of the connecting rod group, the connecting rod group drives the rotation shaft to rotate, and the piston drives the connecting rod group to move, so that the stroke of the piston controls the rotation angle of the rotation shaft, that is to say, the length of the aluminum pipe controls the rotation angle of the rotation shaft.

The aluminum pipes are arranged along the axis direction of the air cylinder, and the support posts are arranged on four corners of the air cylinder by taking the aluminum pipes as the center. Preferably, the aluminum tube is used as a guide tube of the piston, the length of the aluminum tube limits the maximum displacement of the piston, meanwhile, the shorter the aluminum tube is, the shorter the piston finishes a stroke, the smaller the swing amplitude of the indirect rocker arm is, the faster the rocker arm finishes the appointed action, the longer the aluminum tube can be freely cut, and four corners of the surface of the cylinder shell are around the aluminum tube. A pillar is respectively arranged along the axial direction of the inner space of the air cylinder, so that the aluminum pipe is well supported and fixed, the aluminum pipe is covered by the bag when the air cylinder moves downwards, the lower end structure of the air cylinder is not scattered, and the air pressure is not leaked and the use safety of operators or related instruments is ensured.

The bottom of the support column is provided with threads, two nuts are sleeved on the threads, and the two nuts are tightly attached together. Preferably, the lower end of the support column is provided with threads, the lower end of the air cylinder is provided with a space capable of accommodating the nuts and the operating tool, the lower threads of the support column are connected with the two nuts in a threaded manner, one of the nuts is adjusted, and the fixing performance is better.

The first ventilation pipeline is connected with a first interface, and the second ventilation pipeline is connected with a second interface. Preferably, the vent lines are each provided with an interface for connection to an external air source.

The beneficial effects of the utility model are as follows: (1) The thinner support pad and the thinner sealing ring group are used for separating the piston from the cylinder, so that the problem of difficult initial starting of the cylinder is solved; (2) The piston is not in direct contact with the inner surface of the cylinder, so that the friction force is small, and the swing speed of the rocker arm is higher; (3) The grooves formed in the first sealing ring enable the sealing effect to be good and durable; (4) The second sealing ring is internally provided with a calabash-shaped structure, so that the second sealing ring can flexibly deform, meanwhile, the durability of the second sealing ring is improved by the surface skin, and the sealing performance is good; (5) The upper surface and the lower surface of the piston are stressed simultaneously, and the moving speed is high, so that the swing amplitude of the rocker arm is high; (6) The aluminum pipe can be cut as required, so that the swing amplitude of the rocker arm can be conveniently controlled, and meanwhile, the support column plays a good supporting and fixing role, so that the safety performance is good; (7) The lower end of the support post is provided with a self-locking structure, so that the fixing effect is good, and the tightness of the air cylinder and the safety during use are indirectly ensured.

Drawings

FIG. 1 is a diagram of the initial startup internal architecture of the present utility model;

fig. 2 is an enlarged view of fig. 1, a;

FIG. 3 is an enlarged view of FIGS. 1, C;

FIG. 4 is a diagram of the internal architecture of the present utility model after start-up;

FIG. 5 is a block diagram of a cylinder housing of the present utility model;

fig. 6 is an enlarged view of fig. 5 and B.

Fig. 7 is a piston stroke diagram of the present utility model.

In the figure: 1. support pad, 2, piston, 3, seal ring set, 4, first seal ring, 5, second seal ring, 6, waist-like structure, 7, hollow annulus, 8, spacer, 9, post, 10, cylinder, 11, linkage, 12, rotating shaft, 13, first chamber, 14, second chamber, 15, first vent line, 16, aluminum tube, 17, screw thread, 18, nut, 20, second vent line, 21, first interface, 22, second interface.

Detailed Description

The technical scheme of the utility model is further described below by means of specific embodiments and with reference to the accompanying drawings:

example 1

As shown in fig. 2 and 3, the lower end of the connecting rod group 11 is connected with a piston 2, the piston 2 and the axle center of the connecting rod group 11 connected with the piston 2 are the same, an upper sealing ring and a lower sealing ring are circumferentially arranged on the piston 2 and combined together to form a sealing ring group 3, the sealing ring group 3 comprises a second sealing ring 5 positioned above and a first sealing ring 4 positioned at a lower position, the inside of the second sealing ring 5 is in a calabash shape, two ends of the second sealing ring 5 are large and middle-narrow, the narrow part is named as a waist-like structure 6, the waist-like structure 6 and the inside of the surface skin of the second sealing ring 5 form a hollow circular ring 7, as shown in the figure, the hollow circular ring 7 is arranged at the upper side and the lower side of the waist-like structure 6, one end of the second sealing ring 5 is tightly contacted with the inner wall of the cylinder 10, the other end of the second sealing ring 5 is clamped with the piston 2, the contact part of the first sealing ring 4 and the inner wall of the cylinder 10 is provided with grooves, two close contact positions are arranged at the inner ends of the piston 2, the lower end of the piston 2 is clamped on the piston 2, then the supporting pad 1 is clamped on the piston 2, one end gap is separated between the piston 2 and the inner wall of the cylinder 10, and the inner wall of the piston is not contacted with the inner wall of the cylinder 10.

As shown in fig. 1 and 2, the interior of the cylinder 10 is divided into an upper chamber 13 and a lower chamber 14 by the separating layer 8, the upper chamber 13 is provided with a first cavity 13 and the lower cavity 14 is provided with a second cavity 14, most of the structure of the connecting rod group 11 is arranged in the first cavity 13, the rotating shaft 12 is hinged with the upper end of the connecting rod group 11, the rotating shaft 12 is also the rotating center of the rocker arm, in fact, the rocker arm is driven to rotate by the rotating shaft 12 so as to clamp or loosen welding materials by a clamping device connected to the rocker arm, the second cavity 14 comprises a rod-shaped structure at the extreme end of the connecting rod group 11, namely a connecting rod, the connecting rod coaxial with the piston 2 is arranged in the lower part of the cylinder 10, and the first interface 21 and the second interface 22 are respectively communicated with a first ventilation pipeline 15 and a second ventilation pipeline 20 which are arranged on the separating layer 8, as shown in fig. 1 and 4. Both vent lines finally open into the second chamber 14 and are located above and below the piston 2, respectively, to give the piston 2 force in both ways.

Example 2

As shown in fig. 5, the inner wall of the cylinder 10 forming the second chamber 14 at the lower end of the cylinder 10 is the inner wall of the aluminum pipe 16. In fact, the aluminum pipe 16 is generally received directly into a portion of the cylinder 10 in the prior art, and the periphery of the aluminum pipe 16 is divided into four corners according to the shape of the outer shell of the cylinder 10 to be provided with one pillar 9, that is, four pillars 9, respectively.

As shown in fig. 6, the lower end of the pillar 9 is provided with threads 17 and two nuts 18 are used together, a space for convenient adjustment operation is provided near the threads 17 at the lower end of the cylinder 10, and the nuts 18 should be screwed together again after the pillar length is adjusted, that is, the upper and lower nuts 18 should be tightly attached, as shown in fig. 6.

The application process of the utility model is as follows:

after the rocker arm is clamped at the rotating shaft 12, air sources are connected at the first connector 21 and the second connector 22, when the first connector 21 is ventilated, the second connector 22 is ventilated outside the cylinder 10, so that the piston 2 moves downwards at nearly twice the speed, when the second connector 22 is ventilated, the first connector 21 is ventilated outside the cylinder 10 at the same time, the piston 2 moves upwards at nearly twice the speed, after the length of the aluminum pipe 16 is replaced, the bottommost part of the cylinder 10 is installed, then the upper nut 18 is firstly mobilized on the support column 9 until the upper nut 18 is tightly attached to the cylinder 10, after upward tightening, the lower nut 18 is tightly screwed upwards until the two nuts 18 are tightly attached together, and the air inlet or air outlet operation is repeated again.

Claims

1. The welding clamping cylinder structure comprises a cylinder (10), wherein a connecting rod group (11) and a rotating shaft (12) are arranged in the cylinder (10), one end of the connecting rod group (11) is hinged with the rotating shaft (12), one end of the connecting rod group (11) far away from the rotating shaft (12) moves in the axial direction of the cylinder (10), one end of the connecting rod group (11) far away from the rotating shaft (12) is provided with a piston (2),

the piston is characterized in that a gap exists between the piston (2) and the inner surface of the cylinder (10);

the bottom of the piston (2) is provided with a supporting pad (1), and the supporting pad (1) is arranged on the bottom surface of the piston (2);

the piston (2) circumference is equipped with sealing washer group (3), sealing washer group (3) closely laminate with cylinder (10) internal surface.

2. The welding and clamping cylinder structure according to claim 1, wherein the sealing ring set (3) comprises a first sealing ring (4) and a second sealing ring (5), the first sealing ring (4) is in a ring shape and is clamped on the piston (2), and a groove is formed in the middle of one surface of the first sealing ring (4) contacted with the cylinder (10).

3. The welding clamping cylinder structure according to claim 2, wherein the second sealing ring (5) is in a circular ring shape, the cross section of the second sealing ring (5) is in a gourd shape, a waist-like structure (6) is arranged in the middle of the second sealing ring, and two hollow circular rings (7) are formed on two sides of the waist-like structure (6) and the inner surface of the second sealing ring (5).

4. A welding clamping cylinder arrangement according to claim 1 or 2, characterized in that the cylinder (10) is provided with a separation layer (8), the separation layer (8) being in the middle of the cylinder (10) and dividing the interior of the cylinder (10) into two parts, a first chamber (13) and a second chamber (14), respectively, the piston (2) being in the second chamber (14).

5. A welding clamping cylinder structure according to claim 4, characterized in that the upper end of the separation layer (8) is provided with a first ventilation line (15) leading into the second chamber (14), and the bottom of the cylinder (10) is provided with a second ventilation line (20) leading into the second chamber (14).

6. A welding clamping cylinder arrangement as claimed in claim 4, characterized in that the lower half of the cylinder (10) further comprises a pillar (9) and an aluminium tube (16), the second chamber (14) being the hollow inside the aluminium tube (16), the piston (2) being movable within the aluminium tube (16) in the axial direction of the aluminium tube (16).

7. A welding clamping cylinder structure according to claim 6, characterized in that the aluminum pipe (16) is established along the axial direction of the cylinder (10), and the struts (9) are centered on the aluminum pipe (16) and distributed over four corners of the cylinder (10).

8. A welding clamping cylinder structure according to claim 6, characterized in that the bottom of the pillar (9) is provided with a screw thread (17), and that the screw thread (17) is provided with two nuts (18) for socket connection, the two nuts (18) being tightly fitted together.

9. A welding clamping cylinder arrangement according to claim 5, characterized in that the first venting line (15) is connected with a first port (21) and the second venting line (20) is connected with a second port (22).