Tolerance type hook pin clamping air cylinder

Abstract

The utility model relates to the technical field of air cylinder structures, and discloses a tolerance type hook pin clamping air cylinder in order to solve the problems that in the prior art, the structural stability is poor, and the material thickness compensation range is small. Comprising an air cylinder body and an air cylinder inner cavity, a piston rod is arranged in the air cylinder inner cavity, one end of the piston rod is sleeved with an induction block, the induction block is connected with a hook through a guide block, the guide block is oval, and a groove is formed in the middle of the guide block to fix the hook; and a piston is arranged at one end, far away from the induction block, of the piston rod. The hook part in the cylinder moves along a groove of the guide block instead of irregular movement of a traditional hook pin cylinder, the hook rotates along an elliptical track, and the connecting shaft connected with the hook transmits force to enable the hook to rotate to a clamping state or an opening state. Compared with a traditional air cylinder, the material thickness compensation function larger in range is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cylinder structure technical field especially relates to a tolerance formula hook pin clamping cylinder. BACKGROUND

[0002] In the automobile welding or other production workshop, in the automobile welding assembly process, welding processing, large workpiece positioning and other occasions often use the cylinder with positioning and locking functions, due to the complex working condition leads to and satisfies the application characteristics of multiple use demands, so the cylinder used has the following requirements:

[0003] ①The volume is small, has multiple installation modes to adapt to the complex installation application environment.

[0004] ②The structure is stable, the reliability is high, can be attached with self-locking function to prevent the loosening of the clamped workpiece and cause adverse consequences.

[0005] ③It needs to have a large tolerance range to adapt to complex working conditions with large deviation of various plates and workpieces.

[0006] In the prior art, the devices capable of clamping include rotary clamping cylinders, zero-rotation cylinders and lever clamping cylinders.

[0007] The existing hook pin clamping cylinder is widely used in the automobile industry, automatic assembly of large workpieces and other occasions, but most of the installation space and mode have great limitations, and cannot be applied to various plates with different thicknesses and large deviation in complex working conditions, mainly for the following two aspects:

[0008] 1. Low structural stability, unable to add a self-locking function (below 1MPa) ;

[0009] 2. No material thickness compensation function or small compensation range, low adaptability in complex working conditions. INVENTION CONTENTS

[0010] The utility model aims at providing a tolerance formula hook pin clamping cylinder to solve the problems of poor structural stability and small material thickness compensation range in the prior art.

[0011] To achieve the above-mentioned purpose, the specific technical scheme of a tolerance formula hook pin clamping cylinder of the utility model is as follows:

[0012] A tolerance formula hook pin clamping cylinder, comprising a cylinder body and a cylinder internal chamber, a piston rod is arranged in the cylinder internal chamber, an inductive block is sleeved on one end of the piston rod, the inductive block is connected with a hook through a guide block, the guide block is elliptical, a recess is arranged in the middle to fix the hook, one end of the hook is stretched out of the cylinder outside the chamber, an inductor is arranged in the internal chamber of the cylinder close to the inductive block, and a piston is arranged on the end of the piston rod away from the inductive block.

[0013] Further, one end of the induction block is provided with a connecting piece, the induction block is connected with the hook through the connecting piece, a connecting shaft is arranged at the connecting position of the connecting piece and the hook, and the connecting shaft penetrates the guide block. By arranging the connecting piece to connect the induction block and the hook, the connection flexibility between the induction block and the hook is increased, so that the hook can better adapt to materials with different thicknesses, and the stability and reliability of clamping are improved. Meanwhile, the connecting shaft penetrates the guide block, so that the hook moves along the groove of the guide block through the connecting shaft, and the stability and precision of the hook during movement can be ensured.

[0014] Further, the guide block is provided with two blocks, the two guide blocks are arranged at the upper and lower ends of the connecting shaft, and the end of the connecting shaft is provided with a roller for moving along the groove of the guide block. The design of the double guide blocks can ensure that the guide blocks move in a predetermined path, and reduce errors caused by deviation or shaking.

[0015] Further, the piston rod is further provided with a copper sleeve. The copper sleeve has good wear resistance and lubricity, can reduce the friction and wear between the piston rod and the internal cavity of the cylinder, and prolong the service life.

[0016] Further, the middle groove of the guide block is an oval shape with a small amplitude downward at the right end. The design of the groove helps to improve the accuracy of displacement of the hook during clamping, and realizes a large range of tolerance.

[0017] Further, the opening of the internal cavity of the cylinder is further provided with a positioning pin for dust prevention and limiting of the hook. The positioning pin can also limit the maximum extension length of the hook, and prevent over-clamping or damage to the workpiece.

[0018] Further, the end of the piston rod away from the induction block is further provided with a limiting adjusting device.

[0019] Further, the guide block includes two tolerance range models of 5mm and 7mm. The setting of multiple models meets the use requirements of multiple working conditions and different sites, and in complex working conditions, good clamping performance can be achieved and the service life of the product can be met.

[0020] The tolerance type hook pin clamping cylinder has the following advantages:

[0021] 1. Simple structure, the movement trajectory of the hook can be completed by moving along the groove of the guide block.

[0022] 2. Compact structure, with a conventional tolerance range of 5mm and a customizable tolerance range of 7mm, suitable for working environments with large tolerance ranges.

[0023] 3. The cylinder has high stability and high output, and can be equipped with components to realize air pressure and mechanical self-locking functions.

[0024] 4. Stable clamping: The use of double-layer guide blocks and hook connecting shafts ensures that the cylinder interior remains undamaged and clamping failure does not occur even after repeated use. Attached Figure Description

[0025] Figure 1 A cross-sectional view of the cylinder in its overall clamping state provided by this utility model;

[0026] Figure 2 A cross-sectional view of the cylinder in its fully released state provided by this utility model;

[0027] Figure 3 A front view of the piston rod and hook portion provided by this utility model;

[0028] Figure 4 A top view of the piston rod and hook portion with piston provided by this utility model.

[0029] In the diagram: 1. Cylinder; 2. Piston rod; 3. Hook; 4. Guide block; 5. Piston; 6. Limit adjustment device; 7. Copper sleeve; 8. Sensing block; 9. Sensor; 10. Positioning pin; 11. Connecting piece; 12. Connecting shaft; 13. Roller. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] Example 1

[0032] See Figures 1-4 This utility model provides a tolerance-type hook clamping cylinder for use in automotive welding and assembly. The tolerance-type hook clamping cylinder includes a cylinder body 1 and an internal chamber. A piston rod 2, serving as a power transmission component, is disposed within the internal chamber of the cylinder 1. A sensing block 8 is fitted onto one end of the piston rod 2, cooperating with a guide block 4 to sense and transmit the movement of the piston rod 2. The sensing block 8 is connected to a hook 3 via the guide block 4. The guide block 4 is elliptical in shape, providing a certain tolerance range for the movement process. A groove is provided in the middle to fix the piston rod 2 and the hook 3. The hook-shaped end of the hook 3 extends out of the chamber from the cylinder 1 for actually clamping the workpiece or material. A sensor 9 is disposed within the internal chamber of the cylinder 1 near the sensing block 8 to detect the position, speed, or other relevant parameters of the piston rod 2. The piston 5 is located at the end of the piston rod 2 away from the sensing block 8, forming a sealed space with the internal chamber of the cylinder 1. When the cylinder 1 is filled with air, the piston 5 is moved by the pressure, thereby pushing the piston rod 2 and the sensing block 8 and other components.

[0033] As shown in Figure 1 , the clamping state of the tolerance hook clamping cylinder of the application: the cylinder 1 inhales, the piston 5 is located at the end of the piston rod 2 away from the inductive block 8, forms a sealed space with the internal chamber of the cylinder 1, forms negative pressure with the left inner wall of the cylinder 1, the piston 5 is moved under the action of pressure, thereby driving the inductive block 8 to move, the connecting piece 11 drives the roller 13 of the connecting shaft 12 to move upward along the groove limit in the guide block 4, and the one end of the connecting shaft 12 of the hook 3 rotates counterclockwise along the elliptical trajectory, the connecting piece 11 and the connecting shaft 12 connected with the hook 3 transmit force to make the hook 3 rotate to the clamping state.

[0034] As shown in Figure 2 , the opening process of the tolerance hook clamping cylinder of the application: the cylinder 1 exhales, the piston 5 is located at the end of the piston rod 2 away from the inductive block 8, forms a sealed space with the internal chamber of the cylinder 1, when the cylinder 1 exhales, the piston 5 loses the force provided by the cylinder 1 when it inhales, the connecting piece 11 drives the roller 13 of the connecting shaft 12 to move backward along the groove limit in the guide block 4, and the one end of the connecting shaft 12 of the hook 3 rotates clockwise along the elliptical trajectory, the connecting piece 11 and the connecting shaft 12 connected with the hook 3 transmit force to make the hook 3 rotate to the opening state, and the positioning pin 10 limits and prevents dust from entering the extension of the hook 3.

[0035] Preferably, since the hook 3 in the cylinder 1 moves along the groove of the guide block 4, rather than irregular motion of the traditional hook cylinder, the dustproof self-locking hook clamping cylinder 1 can customize the guide block 4, has a larger tolerance range, and realizes a larger material thickness compensation function than the traditional cylinder 1.

[0036] Preferably, the cylinder 1 of the utility model can have a conventional tolerance range of 5mm by using a conventional specification guide block 4, and can have a tolerance range of 7mm by customizing the guide block 4.

[0037] Therefore, under the premise of having considerable clamping force, a conventional tolerance range of 5mm, a customizable tolerance range of 7mm, and a positioning hook, the tolerance hook clamping cylinder 1 can be additionally provided with a gas pressure maintaining machine and a gas cut-off self-locking assembly, meets the use requirements of various working conditions and different sites, has good clamping performance in complex working conditions, and can meet the service life of products.

[0038] Preferably, the limiting adjusting device 6 is a hexagonal nut.

[0039] Preferably, the cylinder 1 of the utility model is tested through frequent working conditions of various plate pieces in the tolerance range and additional mechanical self-locking and gas pressure maintaining functions, no structural damage is found in the cylinder 1, the output is stable and there is no clamping failure phenomenon, and the service life of the cylinder 1 can reach 3 million times through multiple independent tests.

[0040] In summary, the tolerance type hook pin clamping pneumatic cylinder, by adopting the structure along the guide block 4 groove movement, solve the position hook 3 movement irregular design difficulty, at the same time, by changing the guide block 4 can customize hook 3 movement curve to adapt to the site working condition, have greater tolerance range.

[0041] The above merely preferred embodiments of the utility model have been described, and are not used to limit the utility model, any modification, equivalent replacement and improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A tolerance pin chucking cylinder comprising a cylinder (1) body and a cylinder (1) internal chamber, characterized in that, The inside chamber of the cylinder (1) is provided with a piston rod (2), one end of the piston rod (2) is sleeved with an induction block (8), the induction block (8) is connected with a hook (3) through a guide block (4), the guide block (4) is provided in an elliptical shape, a recess is formed in the middle to fix the hook (3), the hook-shaped one end of the hook (3) is extended out of the cylinder (1) from the chamber, an inductor (9) is arranged in the inside chamber of the cylinder (1) close to the induction block (8), a piston (5) is arranged at the end of the piston rod (2) away from the induction block (8).

2. The tolerance hook pin clamping cylinder of claim 1, wherein, One end of the induction block (8) is provided with a connecting piece (11), the induction block (8) is connected with the hook (3) through the connecting piece (11), a connecting shaft (12) is arranged at the connecting position of the connecting piece (11) and the hook (3), and the connecting shaft (12) is arranged in the guide block (4).

3. The tolerance hook pin clamping cylinder of claim 1, wherein, The guide block (4) is provided with two blocks, the two guide blocks (4) are arranged at the upper and lower ends of the connecting shaft (12), and the end of the connecting shaft (12) is provided with a roller (13) for moving along the groove of the guide block (4).

4. The tolerance hook pin clamp cylinder of claim 1, wherein, The piston rod (2) is further provided with a copper sleeve (7).

5. The tolerance hook pin clamp cylinder of claim 1, wherein, The middle recess of the guide block (4) is an elliptical shape with a small amplitude downward at the right end.

6. The tolerance hook pin clamp cylinder of claim 1, wherein, The opening of the inside chamber of the cylinder (1) is further provided with a positioning pin (10) for dust prevention and position limiting of the hook (3).

7. The tolerance hook pin clamp cylinder of claim 1, wherein, The end of the piston rod (2) away from the induction block (8) is further provided with a limiting adjusting device (6).

8. The tolerance hook pin clamp cylinder of claim 1, wherein, The guide block (4) includes two tolerance range models of 5mm and 7mm.

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