A bidirectional inward opening lever cylinder

Abstract

The utility model discloses a bidirectional inner opening type lever cylinder, including cylinder body, the side wall on the upper end of cylinder body is equipped with the air inlet, the side wall on the lower extreme of cylinder body is equipped with the exhaust hole, the upper end mounting of cylinder body has the shaft sleeve, the inside communication of shaft sleeve and the inner chamber of cylinder body, the inside sliding of shaft sleeve is equipped with the sliding axle, and the lower extreme of sliding axle stretches into the inner chamber of cylinder body and is connected with the air plug, the upper end mounting of sliding axle has two opposite settings outer arc plate, and the installation of connecting shaft between two outer arc plates, and the rotation connection of connecting shaft has two briquetting, still be equipped with control assembly on the shaft sleeve, and control assembly is used for the rotation angle of briquetting control limit stop, press the part and resist tight, realize the fixed mode of part reverse clamping, and make part clamping, take part more simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of lever cylinders, and in particular to a bidirectional internally opening lever cylinder. Background Technology

[0002] For some parts that require machining both the inside and outside, clamping can not be done from the outside. To solve this problem, the only option is to manually clamp the parts by passing screws through the inner holes. However, this method suffers from slow clamping speed and low production efficiency, resulting in low efficiency during mass production. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a bidirectional internally opening lever cylinder.

[0004] This utility model is achieved through the following technical solution.

[0005] This utility model provides a bidirectional internally opening lever cylinder, including a cylinder body. An air inlet is provided on the side wall at the upper end of the cylinder body, and an exhaust port is provided on the side wall at the lower end of the cylinder body. A bushing is installed at the upper end of the cylinder body, and the interior of the bushing communicates with the inner cavity of the cylinder body. A sliding shaft is slidably provided inside the bushing, and the lower end of the sliding shaft extends into the inner cavity of the cylinder body and is connected to an air plug. Two opposing outer arc-shaped plates are installed at the upper end of the sliding shaft, and a connecting shaft is installed between the two outer arc-shaped plates. Two pressure blocks are rotatably connected to the connecting shaft. A control component is also provided on the bushing, which is used to control and limit the rotation angle of the pressure blocks.

[0006] Preferably, the pressure block consists of a connecting part and a pressing part, with the end of the connecting part away from the pressing part sleeved on the connecting shaft.

[0007] Preferably, the control component includes two pins, which are horizontally installed inside the bushing and arranged in parallel. A sliding shaft passes between the two pins, and a shaped hole is provided at one end of the connecting part near the pressing part. The two pins pass through the two shaped holes respectively.

[0008] Preferably, the irregular hole is formed by semicircles at both ends and a square in the middle.

[0009] Preferably, the bushing is fixed to the cylinder body by a clamp.

[0010] Preferably, a support pad is installed on the lower end face of the air plug.

[0011] Preferably, the upper end of the bushing has two oppositely arranged notches, which are located on both sides of the connecting shaft, and the width of the notches is greater than the width of the pressure block.

[0012] Preferably, an O-ring is provided circumferentially at the lower end of the bushing.

[0013] Preferably, a rectangular sealing ring is provided circumferentially around the inner side of the lower end of the bushing, and the rectangular sealing ring is sleeved on the sliding shaft.

[0014] Preferably, a nylon pad is provided on the side of the two pressing parts that are far apart from each other.

[0015] The beneficial effects of this utility model are as follows: two pins limit the two pressure blocks respectively. As the sliding shaft extends and retracts, the two pressure blocks rotate along the connecting shaft. The pins move along the trajectory inside the irregular hole, so that the pin shaft controls and limits the rotation of the pressure blocks, thereby realizing the opening and closing state conversion of the two pressure blocks. When the two pressure blocks are in the closed state, the pressure blocks retract within the range of the bushing, so as to pass through the hole of the workpiece and enter the workpiece. Then, the cylinder pushes the two pressure blocks upward to open them, so that the two pressure blocks are in the open state, pressing and clamping the workpiece, realizing the reverse clamping and fixing method of the workpiece, making the clamping and unloading of the workpiece more convenient. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the two pressure blocks in this utility model when they are open; Figure 2 This is a cross-sectional view of the two pressure blocks being retracted in this utility model. Figure 3 This is a top view of the two pressure blocks in this utility model when they are open; Figure 4 This is a top view of the two pressure blocks being retracted in this utility model; Figure 5 This is a three-dimensional structural diagram of the two pressure blocks in this utility model when they are open; Figure 6 This is a three-dimensional structural diagram of the two pressing blocks closing together in this utility model; In the diagram: 1-Nylon pad; 2-Pressure block; 21-Connecting part; 22-Clamping part; 23-Irregular hole; 3-Pin rod; 4-Shaft sleeve; 5-Sliding shaft; 6-Inlet hole; 7-Exhaust hole; 8-Cylinder block; 9-Support pad; 10-Air plug; 11-O-ring seal; 12-Rectangular seal; 13-Screw hole; 14-Clamp; 15-Connecting shaft; 16-Notch. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] In this embodiment, refer to Figure 1 , Figure 3 and Figure 5 The cylinder includes a cylinder body 8, with screw holes 13 on its surface for easy screw installation and assembly. An air inlet 6 is provided on the upper side wall of the cylinder body 8, and an exhaust hole 7 is provided on the lower side wall of the cylinder body 8. An opening is provided on the upper end face of the cylinder body 8, and a bushing 4 is installed at the opening. The lower end of the bushing 4 is installed in the inner cavity of the cylinder body 8 and is then clamped to the upper end of the cylinder body 8 by a clamp 14. The upper end of the bushing 4 extends out of the cylinder body 8. The end face diameter of the lower end of the bushing 4 is greater than the end face diameter of the upper end of the bushing 4, so that the bushing 4 is vertically installed on the cylinder body 8, and the interior of the bushing 4 is in communication with the interior of the cylinder body 8.

[0020] In this embodiment, refer to Figure 1 An O-ring 11 is provided circumferentially at the lower end of the bushing 4, which enhances the sealing between the bushing 4 and the cylinder 8.

[0021] In this embodiment, refer to Figure 1 and Figure 2 A sliding shaft 5 is slidably mounted inside the bushing 4. The lower end of the sliding shaft 5 extends into the inner cavity of the cylinder body 8 and is fixedly connected to an air plug 10. A support pad 9 is fixedly installed on the lower end face of the air plug 10. The support pad 9 not only protects the air plug 10 but also supports the sliding shaft 5, thereby enhancing the stability of the overall structure. A rectangular sealing ring 12 is circumferentially arranged around the inner side of the lower end of the bushing 4. The rectangular sealing ring 12 is fitted onto the sliding shaft 5 to enhance the sealing between the inside of the bushing 4 and the sliding shaft 5.

[0022] Two opposing outer arc plates are installed on the upper end of the sliding shaft 5. The sliding shaft 5 and the outer arc plates are integrally formed. A connecting shaft 15 is installed between the two outer arc plates. Two pressure blocks 2 are rotatably connected on the connecting shaft 15. A control component is also provided on the bushing 4. The control component is used to limit the rotation angle of the pressure block 2.

[0023] In this embodiment, refer to Figure 1 The pressure block 2 is composed of a connecting part 21 and a pressing part 22. The end of the connecting part 21 away from the pressing part 22 is sleeved on the connecting shaft 15 and is used to cooperate with the control component to control the rotation range of the limiting pressure block 2.

[0024] In this embodiment, refer to Figure 1 , Figure 5 and Figure 6 The control component includes two pins 3, which are horizontally mounted inside the bushing 4. The two ends of the pins 3 are fixedly mounted on the inner side wall of the bushing 4. The sliding shaft 5 passes through the two pins 3. The end of the connecting part 21 away from the pressing part 22 is rotatably sleeved on the connecting shaft 15. The end of the connecting part 21 near the pressing part 22 has an irregular hole 23. The irregular hole 23 is formed by semicircles at both ends and a square in the middle. The two pins 3 are respectively inserted into the two irregular holes 23. The pins 3 move along the shape trajectory of the irregular holes 23 to ensure that the pressure block 2 can move within a certain range along the pins 3.

[0025] Two pressure blocks 2 rotate on the connecting shaft 15, and the movement trajectory of the two pressure blocks 2 is restricted by two pins 3 respectively. When the sliding shaft 5 moves upward, the pins 3 move in the irregular hole 23, so that the two pressure blocks 2 open to form a 180-degree open state. When the sliding shaft 5 moves downward, the two pressure blocks 2 close to a 0-degree closed state. When the two pressure blocks 2 are in the closed state, the two pressure blocks 2 are within the inner range of the bushing 4, which makes it easy to extend the pressure block 2 on the cylinder into the part. When the two pressure blocks 2 are in the open state, it is easy to press and fix the part from the inside.

[0026] In this embodiment, refer to Figure 5 and Figure 6 The upper end of the bushing 4 has two oppositely arranged notches 16, which are located on both sides of the connecting shaft 15. The width of the notches 16 is greater than the width of the pressure block 2. The two pressure blocks 2 rotate in the direction of the two notches 16 to leave room for movement of the pressure blocks 2.

[0027] In this embodiment, refer to Figure 5 Nylon pads 1 are provided on the sides of the two pressing parts 22 that are far apart from each other. The nylon pads 1 are fixedly connected to the surface of the pressing part 22, so that the pressing block 2 and the part are in flexible contact, thus avoiding damage to the inside of the part during the pressing process.

[0028] The working principle of this embodiment is as follows: Two pins 3 limit the two pressure blocks 2 respectively. As the sliding shaft 5 extends and retracts, it drives the two pressure blocks 2 to rotate along the connecting shaft 15. The pins 3 move along the trajectory in the irregular hole 23 to realize the opening and closing state conversion of the two pressure blocks 2. The cylinder pulls the sliding shaft 5 downward to merge the two pressure blocks 2. When the two pressure blocks 2 are in the closed state, the pressure blocks 2 retract within the range of the bushing 4, which facilitates passing through the hole of the workpiece and entering the workpiece. Then, the cylinder pushes the sliding shaft 5 upward to open the two pressure blocks 2, so that the two pressure blocks 2 are in the open state and press and hold the workpiece from the inside to realize the fixed method of reverse clamping of the workpiece, making the clamping and removal of the workpiece more convenient.

[0029] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A bidirectional internally opening lever cylinder, characterized in that: The cylinder (8) includes an air inlet (6) on the upper side wall and an exhaust (7) on the lower side wall. A bushing (4) is installed on the upper end of the cylinder (8). The interior of the bushing (4) is connected to the inner cavity of the cylinder (8). A sliding shaft (5) is slidably installed inside the bushing (4). The lower end of the sliding shaft (5) extends into the inner cavity of the cylinder (8) and is connected to an air plug (10). Two opposing outer arc plates are installed on the upper end of the sliding shaft (5). A connecting shaft (15) is installed between the two outer arc plates. Two pressure blocks (2) are rotatably connected on the connecting shaft (15). A control component is also provided on the bushing (4). The control component is used to control and limit the rotation angle of the pressure block (2).

2. The bidirectional internally opening lever cylinder as described in claim 1, characterized in that: The pressure block (2) consists of a connecting part (21) and a pressing part (22), with the end of the connecting part (21) away from the pressing part (22) sleeved on the connecting shaft (15).

3. The bidirectional internally opening lever cylinder as described in claim 2, characterized in that: The control component includes two pins (3), which are horizontally installed inside the bushing (4) and are arranged in parallel. A sliding shaft (5) passes between the two pins (3). A shaped hole (23) is provided at one end of the connecting part (21) near the pressing part (22), and the two pins (3) pass through the two shaped holes (23) respectively.

4. The bidirectional internally opening lever cylinder as described in claim 3, characterized in that: The irregular hole (23) is formed by semicircles at both ends and a square in the middle.

5. The bidirectional internally opening lever cylinder as described in claim 1, characterized in that: The bushing (4) is fixed inside the cylinder body (8) by a clamp (14).

6. The bidirectional internally opening lever cylinder as described in claim 1, characterized in that: A support pad (9) is installed on the lower end face of the air plug (10).

7. The bidirectional internally opening lever cylinder as described in claim 1, characterized in that: The upper end of the bushing (4) has two opposite notches (16), which are located on both sides of the connecting shaft (15). The width of the notches (16) is greater than the width of the pressure block (2).

8. The bidirectional internally opening lever cylinder as described in claim 1, characterized in that: The lower end of the bushing (4) is fitted with an O-ring (11) along the circumferential direction.

9. The bidirectional internally opening lever cylinder as described in claim 1, characterized in that: A rectangular sealing ring (12) is provided around the inner side of the lower end of the bushing (4) in the circumferential direction, and the rectangular sealing ring (12) is sleeved on the sliding shaft (5).

10. The bidirectional internally opening lever cylinder as described in claim 2, characterized in that: A nylon pad (1) is provided on the side of the two pressing parts (22) that are far apart from each other.

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