Centering holding and clamping device

Abstract

The utility model relates to a centering holding and clamping device which comprises an air cylinder and two sets of holding and clamping structures, each holding and clamping structure comprises a supporting seat, a clamping arm, a connecting rod and a clamping block, one end of each supporting seat is hinged with one end of each clamping arm, each clamping arm comprises a first clamping arm and a second clamping arm, each clamping block is installed on each clamping arm, and one end of each connecting rod is hinged with the corresponding first clamping arm; the air cylinder comprises a driving air cylinder located between the two clamping structures, and an output shaft of the driving air cylinder is hinged to the other ends of the two connecting rods. Compared with the prior art, one air cylinder is adopted to drive the holding and clamping structures on the two sides, two clamping actions are combined into one, the number of the air cylinders is reduced, the clamping actions are optimized, and the welding quality is guaranteed; by arranging the air cylinder position sensor and the limiter, the position of the output shaft of the driving air cylinder is limited; through the pilot-operated speed regulating valve, the air cylinder can be kept in a locking state when air is cut off; and the action time of clamping and opening the air cylinder can be shortened through the quick exhaust valve.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a centering clamping device. Background Art

[0002] The process of automobile manufacturing includes stamping, welding, painting and assembly. Welding production is large in batches, fast in production speed, and requires high precision in assembly of welded parts. It is mostly produced in an assembly line mode with a high degree of mechanization and automation. Special equipment and fixtures are widely used. More and more welding work is done by automatic welding machines and welding robots.

[0003] When the frame is welded, the frame to be welded is fixed with a clamp. The existing frame welding line often uses two sets of left and right mechanisms to clamp the frame for welding. Since the two cylinders do not move completely synchronously, it is impossible to ensure that the left and right longitudinal beams of the frame are clamped at the same time, which will cause one side to be not clamped in place, affecting the welding quality.

[0004] Therefore, designing a device that can simultaneously clamp both sides of a frame is a technical problem that needs to be solved. Utility Model Content

[0005] The utility model aims to provide a centering clamping device in order to overcome the defect of the clamping devices on both sides of the frame in the prior art that the clamping actions are not synchronized, resulting in inadequate clamping.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a centering clamping device is provided, comprising a cylinder and a clamping structure, wherein the clamping structure has two sets, each set of the clamping structure comprises a support seat, a clamping arm, a connecting rod and a clamping block, one end of the support seat is hinged to one end of the clamping arm, the clamping arm comprises a first clamping arm and a second clamping arm, a clamping block is installed thereon, and one end of the connecting rod is hinged to the first clamping arm; the cylinder comprises a driving cylinder, the driving cylinder is located between the two sets of clamping structures, and the output shaft of the driving cylinder is hinged to the other ends of the two connecting rods.

[0008] As a preferred technical solution, a mounting bracket is provided in the output shaft direction of the driving cylinder, and two cylinder position sensors are provided on the mounting bracket.

[0009] As a preferred technical solution, a limiter is also provided on the mounting frame.

[0010] As a preferred technical solution, the support seat includes a support and a connecting member, one end of the connecting member is connected to the support, and the other end is hinged to one end of the first clamping arm.

[0011] As a preferred technical solution, the support base also includes a reinforcing connecting piece, and the support includes a first support and a second support, the first support is connected to one end of the connecting piece, the second support is connected to the other end of the connecting piece through the reinforcing connecting piece, and one end of the second clamp arm is hinged to the second support.

[0012] As a preferred technical solution, a quick exhaust valve and a pilot speed regulating valve are also installed on the driving cylinder.

[0013] As a preferred technical solution, the cylinder further comprises an auxiliary cylinder, the auxiliary cylinder is mounted on a support seat, and the output shaft of the auxiliary cylinder is hinged to the second clamping arm.

[0014] As a preferred technical solution, a workpiece detection sensor is also installed on the support seat between the first clamping arm and the second clamping arm.

[0015] As a preferred technical solution, the clamping block on the first clamping arm is a clamping block, and the clamping block on the second clamping arm is a supporting block.

[0016] As a preferred technical solution, a limiting block is also installed between the clamping arm and the supporting seat.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The utility model adopts one cylinder to drive the clamping structure on both sides, combines two clamping actions into one, reduces the number of cylinders, realizes the simultaneous clamping of both sides of the frame, optimizes the clamping action, ensures the welding quality, and achieves the purpose of reducing costs and improving quality;

[0019] 2) The utility model sets a cylinder position sensor and a limiter to limit the position of the output shaft of the driving cylinder, so that the driving cylinder drives the clamping arm to move to the set position;

[0020] 3) The utility model ensures that the cylinder can remain locked when the air is cut off through the pilot speed regulating valve; the cylinder clamping and opening action time can be reduced through the quick exhaust valve;

[0021] 4) The utility model is applicable to most frame welding lines, and is not limited to frame welding lines, but is applicable to all occasions requiring synchronous clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the clamping arm of the utility model in a clamping state;

[0023] Figure 2 It is a comparative schematic diagram of the clamping and opening states of the clamping arm of the utility model;

[0024] The numbers in the figure show:

[0025] 10. Driving cylinder, 100. Quick exhaust valve, 101. Pilot speed regulating valve, 11. Auxiliary cylinder, 2001. First support, 2002. Second support, 201. Connecting piece, 202. Reinforced connecting piece, 211. First clamping arm, 212. Second clamping arm, 22. Connecting rod, 231. Clamping block, 232. Support block, 3. Mounting frame, 30. Cylinder position sensor, 31. Limiter, 4. Workpiece detection sensor, 5. Limit block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] like Figure 1 As shown, the utility model provides a centering clamping device, including a cylinder and a clamping structure. The clamping structure has two sets, and the cylinder is located in the middle of the clamping structure, and drives the clamping structures on both sides to achieve synchronous clamping.

[0028] The cylinder includes a driving cylinder 10 , and preferably, also includes an auxiliary cylinder 11 .

[0029] The clamping structure includes a support seat, a clamping arm, a connecting rod 22 and a clamping block. The support seat includes a support, a connecting piece 201 and a reinforcing connecting piece 202. There are two clamping arms, namely a first clamping arm 211 and a second clamping arm 212. A clamping block 231 is installed on the first clamping arm 211, and a positioning block is installed on the second clamping arm 212. The clamping block includes a clamping block 231 and a support block 232. There are two supports, namely a first support 2001 and a second support 2002. The connecting piece 201 is installed on the first support 2001, the first clamping arm 211 is installed on the connecting piece 201, the connecting piece 201 is connected to the second support 2002 through the reinforcing connecting piece 202, and the second clamping arm 212 is installed on the second support 2002. The first clamping arm 211 is hinged to one end of the connecting rod 22, and the other ends of the connecting rods 22 of the two sets of clamping structures are hinged to the output shaft of the driving cylinder 10. Preferably, the output shaft of the auxiliary cylinder 11 is hinged to the second clamping arm 212 .

[0030] A mounting bracket 3 is provided in the direction of the output shaft of the driving cylinder 10, and two cylinder position sensors 30 and a limiter 31 are provided on the mounting bracket 3. One of the two position sensors is installed at the extreme position where the output shaft of the driving cylinder 10 is extended, and the other is installed at the extreme position where the output shaft of the driving cylinder 10 is retracted, and is used to detect whether the driving cylinder 10 is in place. The limiter 31 is used to limit the output shaft of the driving cylinder 10. A quick exhaust valve 100 and a pilot speed regulating valve 101 are also installed on the driving cylinder 10. The quick exhaust valve 100, also known as a quick exhaust valve, is an important component in pneumatic control and is a one-way direction control component; it is often configured between the cylinder and the reversing valve, so that the gas in the cylinder is discharged directly from this valve without passing through the reversing valve, and is suitable for occasions where the cylinder is required to move quickly. The pilot speed regulating valve 101 ensures that the cylinder can remain locked when the air is cut off; the use of the exhaust valve can reduce the action time of the cylinder clamping and opening.

[0031] A workpiece detection sensor 4 is installed on the connecting member 201 between the first clamping arm 211 and the second clamping arm 212. A limit block 5 is installed between the first clamping arm 211 and the connecting member 201, and a limit block 5 is installed between the second clamping arm 212 and the second support 2002.

[0032] like Figure 2 As shown, the open and closed states of the present invention are shown. The present invention uses a cylinder to drive the connecting rod 22 mechanism to achieve simultaneous clamping of the left and right sides; after the driving cylinder 10 is ventilated, the guide rod extends, driving the connecting rod 22 mechanism to move, and finally the clamping action of the clamp arm is achieved. After reaching the position, the sensor feedback signal; after the driving cylinder 10 is ventilated, the guide rod retracts, driving the connecting rod 22 mechanism to move, and finally the clamping arm is opened; after reaching the position, the sensor feedback signal. When the cylinder is not ventilated, the device will be locked in the existing state.

[0033] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A centering clamping device, characterized in that: The invention comprises a cylinder and a clamping structure, wherein the clamping structure has two sets, each set of the clamping structure comprises a support seat, a clamping arm, a connecting rod (22) and a clamping block, one end of the support seat is hinged to one end of the clamping arm, the clamping arm comprises a first clamping arm (211) and a second clamping arm (212), on which a clamping block is mounted, and one end of the connecting rod (22) is hinged to the first clamping arm (211); the cylinder comprises a driving cylinder (10), the driving cylinder (10) is located between the two sets of clamping structures, and the output shaft of the driving cylinder (10) is hinged to the other ends of the two connecting rods (22).

2. A centering clamping device according to claim 1, characterized in that: A mounting frame (3) is provided in the output shaft direction of the driving cylinder (10), and two cylinder position sensors (30) are provided on the mounting frame (3).

3. A centering clamping device according to claim 2, characterized in that: The mounting frame (3) is also provided with a stopper (31).

4. A centering clamping device according to claim 1, characterized in that: The support seat comprises a support and a connecting piece (201), one end of the connecting piece (201) is connected to the support, and the other end is hinged to one end of the first clamping arm (211).

5. A centering clamping device according to claim 4, characterized in that: The support seat also includes a reinforcing connecting piece (202), and the support includes a first support (2001) and a second support (2002), the first support (2001) is connected to one end of the connecting piece (201), the second support (2002) is connected to the other end of the connecting piece (201) through the reinforcing connecting piece (202), and one end of the second clamping arm (212) is hinged to the second support (2002).

6. A centering clamping device according to claim 1, characterized in that: The driving cylinder (10) is also provided with a quick exhaust valve (100) and a pilot-operated speed regulating valve (101).

7. A centering clamping device according to claim 1, characterized in that: The cylinder also includes an auxiliary cylinder (11), which is mounted on a support seat, and an output shaft of the auxiliary cylinder (11) is hinged to the second clamping arm (212).

8. The centering clamping device according to claim 1, characterized in that: A workpiece detection sensor (4) is also installed on the support seat between the first clamping arm (211) and the second clamping arm (212).

9. The centering clamping device according to claim 1, characterized in that: The clamping block on the first clamping arm (211) is a clamping block (231), and the clamping block on the second clamping arm (212) is a supporting block (232).

10. The centering clamping device according to claim 1, characterized in that: A limiting block (5) is also installed between the clamping arm and the supporting seat.

Images