Air cylinder

Abstract

The air cylinder comprises a cylinder body and a piston rod, the cylinder body is provided with a first cavity, part of the piston rod is located in the first cavity, the air cylinder comprises a piston, the piston comprises a main body part, a first limiting part and a second limiting part, and the main body part, the first limiting part and the second limiting part are integrated. The piston rod is sleeved with the main body part, the piston rod comprises a first groove and a second groove, the first groove and the second groove are formed in the axial direction of the piston rod, at least part of the first limiting part is located in the first groove, and at least part of the second limiting part is located in the second groove. At least part of the first limiting part is located in the first groove, at least part of the second limiting part is located in the second groove, the piston and the piston rod are connected, the main body part, the first limiting part and the second limiting part are integrated, and the reliability of connection of the piston and the piston rod is improved.

Description

Technical field

[0001] The utility model relates to the field of pneumatics, in particular to a cylinder. [Background Technology]

[0002] refer to Figure 6 A cylinder includes a cylinder body, a piston rod 1' and a piston. The piston includes a first piston 21' and a second piston 22'. The piston rod 1' can reciprocate in the cylinder body. One end of the first piston 21' is riveted to the piston rod 1', and one end of the second piston 22' is riveted to the piston rod 1'.

[0003] There is a dimensional tolerance between the first piston 21' and the piston rod 1', and there is a dimensional tolerance between the second piston 22' and the piston rod 1'. The cumulative dimensional tolerance of the piston and the piston rod 2' is relatively large. After riveting, there is a certain distance between the other end of the first piston 21' and the other end of the second piston 22', so that the other end of the first piston 21' and the other end of the second piston 22' cannot be limited; or the other end of the first piston 21' and the other end of the second piston 22' transitionally press against each other, thereby tilting up, and the reliability of the connection between the piston and the piston rod 1' needs to be further improved. [Utility Model Content]

[0004] In order to solve the above problems, the following technical solution is provided: a cylinder, the cylinder comprising a cylinder body and a piston rod, the cylinder body having a first chamber, part of the piston rod being located in the first chamber, the cylinder comprising a piston, the piston comprising a main body, a first limiting part and a second limiting part, the main body, the first limiting part and the second limiting part being an integral part, the main body being sleeved on the piston rod, the piston rod comprising a first groove and a second groove, the first groove and the second groove being arranged in the axial direction of the piston rod, at least part of the first limiting part being located in the first groove, and at least part of the second limiting part being located in the second groove.

[0005] Such a cylinder includes a piston rod and a piston, and the piston includes a main body, a first limiting part and a second limiting part. The main body, the first limiting part and the second limiting part are an integrated part, and the main body is sleeved on the piston rod. The piston rod includes a first groove and a second groove. The first groove and the second groove are arranged axially in the piston rod. At least part of the first limiting part is located in the first groove, and at least part of the second limiting part is located in the second groove. The piston is connected to the piston rod. The main body, the first limiting part and the second limiting part are an integrated part, which improves the reliability of the connection between the piston and the piston rod.

Brief Description of the Drawings

[0006] Figure 1 It is a cross-sectional schematic diagram of the cylinder in the utility model;

[0007] Figure 2 yes Figure 1 a schematic cross-sectional view of the middle piston;

[0008] Figure 3 It is a partial enlarged schematic diagram of part A in the figure;

[0009] Figure 4 yes Figure 1 Schematic cross-sectional view of the intermediate pressure block;

[0010] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part A;

[0011] Figure 6 It is a structural diagram of the background technology of the present utility model.

[0012] Reference numerals:

[0013] Cylinder 1, first chamber 11,

[0014] Piston rod 2, first groove 21, second groove 22, second receiving groove 23,

[0015] Piston 3, main body 31, external thread 311, first limiting portion 32, first wall portion 321, second limiting portion 33,

[0016] Pressing block 4, first pressing portion 41, second wall portion 42, third wall portion 43, internal thread 44,

[0017] Magnetic piece 5,

[0018] The first stopper 6, the first receiving groove 61,

[0019] The first sealing member 71, the second sealing member 72,

[0020] First end cover 73, first channel 731, third receiving groove 732,

[0021] The second end cover 74, the second channel 741, the fourth receiving groove 742,

[0022] A third sealing member 75 , a fourth sealing member 76 , a first buffer member 77 , and a second buffer member 78 . [Specific implementation method]

[0023] The technical solutions of the specific implementation methods are described below with reference to the accompanying drawings.

[0024] It should be noted that: although this specification has described the utility model in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that technicians in the relevant technical field can still modify, combine or replace the utility model, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the utility model should be included in the scope of the claims of the utility model.

[0025] refer to Figure 1 , a cylinder, the cylinder includes a cylinder body 1 and a piston rod 2, the cylinder body 1 has a first chamber 11, part of the piston rod 2 is located in the first chamber 11, the cylinder includes a piston 3, the piston 3 includes a main body 31, a first limiting portion 32 and a second limiting portion 33, the main body 31, the first limiting portion 32 and the second limiting portion 33 are an integrated part, the main body 31 is sleeved on the piston rod 2, the piston rod 2 includes a first groove 21 and a second groove 22, the first groove 21 and the second groove 22 are arranged in the axial direction of the piston rod 2, at least part of the first limiting portion 32 is located in the first groove 21, and at least part of the second limiting portion 33 is located in the second groove 22, and the piston 3 can drive the piston rod 22 to reciprocate under the action of an air source (compressed air), etc.

[0026] Such a cylinder includes a piston rod 2 and a piston 3. The piston 3 includes a main body 31, a first limiting part 32 and a second limiting part 33. The main body 31, the first limiting part 32 and the second limiting part 33 are an integrated part. The main body 31 is sleeved on the piston rod 2. The piston rod 2 includes a first groove 21 and a second groove 22. The first groove 21 and the second groove 22 are arranged in the axial direction of the piston rod 2. At least part of the first limiting part 32 is located in the first groove 21, and at least part of the second limiting part 33 is located in the second groove 22, connecting the piston 3 to the piston rod 2. The main body 31, the first limiting part 32 and the second limiting part 33 are an integrated part, which improves the reliability of the connection between the piston 3 and the piston rod 2.

[0027] The first groove 21 and the second groove 22 can be formed on the piston rod 2 by cutting, and the first limiting portion 32 and the second limiting portion 33 of the piston 3 are limited in the first groove 21 and the second groove 22 by riveting, thereby limiting the connection between the piston 3 and the piston rod 2.

[0028] The main body 31 , the first limiting portion 32 and the second limiting portion 33 are an integrated part, which reduces the cumulative tolerance between the piston 3 and the piston rod 2 and improves the reliability of the connection between the piston 3 and the piston rod 2 .

[0029] The main body 31 can be loosely fitted with the piston rod 2 , thereby improving the connection reliability between the piston 3 and the piston rod 2 .

[0030] refer to Figure 1-Figure 3The first limiting portion 32 is located at one end of the main body 31, the first limiting portion 32 is annular, the first groove 21 is annular, and the first limiting portion 32 is adapted to the first groove 21. The second limiting portion 33 is located at the other end of the main body 31, the second limiting portion 33 is annular, the second groove 22 is annular, and the second limiting portion 33 is adapted to the second groove 22, thereby improving the firmness of the connection between the piston 3 and the piston rod 2.

[0031] Of course, there can be multiple first limiting parts 32, and multiple first limiting parts 32 are arranged circumferentially at the end of the main body 31. The number of first grooves 21 is the same as the number of first limiting parts 32. One first limiting part 32 corresponds to one first groove 21. There can be multiple second limiting parts 33, and there can be multiple second grooves 22. They will not be elaborated here.

[0032] refer to Figure 1-Figure 5 The cylinder includes a pressure block 4, and the piston rod 2 is penetrated by the pressure block 4. The pressure block 4 has a first pressing portion 41, and the first pressing portion 41 is sleeved on the first limiting portion 32. The pressure block 4 limits the first limiting portion 32 in the radial direction of the piston rod 2, reducing the risk of the first limiting portion 32 being separated from the first groove 21, and improving the reliability of the connection between the piston 3 and the piston rod 2.

[0033] refer to Figure 2-Figure 3 The first limiting portion 32 has a first wall portion 321, which is the outer peripheral wall portion of the first limiting portion 32. The shape of the first wall portion 321 is the side wall of a cone. The inner diameter of the first wall portion 321 increases from the end of the first limiting portion 32 away from the main body portion 31 to the end of the first limiting portion 32 close to the main body portion 31. When installing the pressure block 4, the pressure block 4 gradually presses the first limiting portion 32 to reduce the influence of errors or tolerances.

[0034] refer to Figure 2-Figure 5 The pressing block 4 includes a second wall portion 42 and a third wall portion 43. The second wall portion 42 extends from one end of the first pressing portion 41, and the third wall portion 43 extends from the other end of the first pressing portion 41. The first pressing portion 41 is adapted to the first wall portion 321, that is, the first pressing portion 41 and the first wall portion 321 have roughly the same shape. The first pressing portion 41 is sleeved on the first wall portion 321, which facilitates the installation of the pressing block 4 and increases the force-bearing surface of the first wall portion 321, thereby increasing the pressing force.

[0035] refer to Figure 1 、 Figure 4-Figure 5The axis of the second wall portion 42 coincides with the axis of the piston rod 2, and the second wall portion 42 extends axially of the piston 3. The axis of the third wall portion 43 coincides with the axis of the piston rod 2, and the third wall portion 43 extends radially of the piston rod 2. In the radial direction of the second wall portion 42, the third wall portion 43 protrudes from one end of the second wall portion 42, and the axis of the third wall portion 43 coincides with the axis of the piston rod 2. The first limiting portion 32 is located at one end of the second wall portion 42.

[0036] refer to Figure 2 and Figure 5 The pressing block 4 has an internal thread 44, which is located on the side of the third wall portion 43 away from the second wall portion 42, and the main body portion 31 has an external thread 311 adapted to the internal thread 44, so as to facilitate the connection between the pressing block 4 and the piston 3.

[0037] refer to Figure 1 The cylinder includes a magnetic part 5, which is sleeved on the main body 31. The cylinder includes a first stop part 6, which protrudes from the main body 31. The magnetic part 5 is located between the pressure block 4 and the first stop part 6. After the pressure block 4 and the piston 3 are installed in place, the magnetic part 5 is clamped between the pressure block 4 and the first stop part 6.

[0038] An induction switch (not shown in the figure) is provided on the outside of the cylinder body 1 to sense the position of the magnetic member 5 , thereby positioning the piston 3 .

[0039] refer to Figure 1-Figure 2 The first stop portion 6 has a first accommodating groove 61, which is recessed in the wall of the first stop portion 6 away from the main body portion 31. The cylinder includes a first seal 71, and the first seal 71 is partially located in the first accommodating groove 61. The first seal 71 is located between the bottom wall of the first accommodating groove 61 and the first cylinder body 1. When the piston 3 moves left and right, the reduced gas enters the chamber on the left side of the piston 3 into the chamber on the right side of the piston 3.

[0040] In order to further improve the sealing performance of the chamber on the left side and the chamber on the right side of the piston 3, refer to Figure 1 The piston rod 2 has a second accommodating groove 23, which is recessed in the outer peripheral wall of the piston rod 2. The second accommodating groove 23 is located on the side of the first groove 21 close to the second groove 22. The cylinder includes a second sealing member 72, and the second sealing member 72 is partially located in the second accommodating groove 23. The second sealing member 72 is located between the main body 31 and the bottom wall of the second accommodating groove 23.

[0041] refer to Figure 1The cylinder includes a first end cover 73, the piston rod 2 passes through the first end cover 73, one end of the cylinder body 1 is sleeved on the first end cover 73, the first end cover 73 has a first channel 731, the first channel 731 can be communicated with the first chamber 11, the cylinder includes a second end cover 74, the piston rod 2 passes through the second end cover 74, the other end of the cylinder body 1 is sleeved on the second end cover 74, the second end cover 74 has a second channel 741, the second channel 741 can be communicated with the first chamber 11.

[0042] refer to Figure 1 The first channel 731 can be used as an inlet channel, such as an air intake channel, and the second channel 741 can be used as an outlet channel, such as an air outlet channel. During operation, gas enters through the first channel 731 and enters the chamber on the left side of the piston 3 through the gap between the piston rod 2 and the first end cover 73, pushing the piston 3 to move to the right, thereby causing the piston rod 2 to move to the right. The gas in the chamber on the right side of the piston 3 enters the second channel 741 through the gap between the piston rod 2 and the second end cover 74, and then flows out from the second channel 741.

[0043] refer to Figure 1 The first channel 731 can be used as an outlet channel, such as an air outlet channel, and the second channel 741 can be used as an inlet channel, such as an air intake channel. During operation, gas enters through the second channel 741 and enters the chamber on the right side of the piston 3 through the gap between the piston rod 2 and the second end cover 74, pushing the piston 3 to move to the left, thereby causing the piston rod 2 to move to the left. The gas in the chamber on the left side of the piston 3 enters the first channel 731 through the gap between the piston rod 2 and the first end cover 73, and then flows out from the first channel 731.

[0044] refer to Figure 1 The cylinder includes a Y-shaped third seal 75 and a fourth seal 76. The first end cover 73 has a third accommodating groove 732. The third seal 75 is located between the bottom wall of the third accommodating groove 732 and the piston rod 2. The opening of the third seal 75 faces the piston 3. The third seal 75 is located on the side of the first channel 731 away from the second end cover 74. The second end cover 74 has a fourth accommodating groove 742. The fourth seal 76 is located between the bottom wall of the fourth accommodating groove 742 and the piston rod 2. The opening of the fourth seal 76 faces the piston 3. The fourth seal 76 is located on the side of the second channel 741 away from the first end cover 73.

[0045] refer to Figure 1 The cylinder includes a first buffer member 77 and a second buffer member 78. The first buffer member 77 is arranged at the right end of the first end cover 73, and the second buffer member 78 is arranged at the left end of the second end cover 74, which reduces the impact of the pressure block 4 on the first end cover 73 and the impact of the piston 3 on the second end cover 74, thereby improving the service life of the cylinder.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A cylinder comprising a cylinder body (1) and a piston rod (2), wherein the cylinder body (1) has a first chamber (11), and a portion of the piston rod (2) is located in the first chamber (11), characterized in that: The cylinder includes a piston (3), and the piston (3) includes a main body (31), a first limiting part (32) and a second limiting part (33). The main body (31), the first limiting part (32) and the second limiting part (33) are an integral part. The main body (31) is sleeved on the piston rod (2). The piston rod (2) includes a first groove (21) and a second groove (22). The first groove (21) and the second groove (22) are arranged in the axial direction of the piston rod (2). At least a part of the first limiting part (32) is located in the first groove (21), and at least a part of the second limiting part (33) is located in the second groove (22).

2. The cylinder according to claim 1, characterized in that The first limiting portion (32) is located at one end of the main body (31), the first limiting portion (32) is annular, the first groove (21) is annular, and the first limiting portion (32) is adapted to the first groove (21). The second limiting portion (33) is located at the other end of the main body (31), the second limiting portion (33) is annular, the second groove (22) is annular, and the second limiting portion (33) is adapted to the second groove (22).

3. The cylinder according to claim 2, characterized in that The cylinder comprises a pressure block (4), the piston rod (2) passes through the pressure block (4), the pressure block (4) has a first pressing portion (41), and the first pressing portion (41) is sleeved on the first limiting portion (32).

4. The cylinder according to claim 3, characterized in that The first limiting portion (32) has a first wall portion (321), which is the outer peripheral wall portion of the first limiting portion (32). The shape of the first wall portion (321) is the shape of the side wall of a truncated cone, and the inner diameter of the first wall portion (321) increases from the end of the first limiting portion (32) away from the main body portion (31) to the end of the first limiting portion (32) close to the main body portion (31).

5. The cylinder according to claim 4, characterized in that The pressing block (4) comprises a second wall portion (42) and a third wall portion (43), wherein the second wall portion (42) extends from one end of the first pressing portion (41), and the third wall portion (43) extends from the other end of the first pressing portion (41), and the first pressing portion (41) is adapted to the first wall portion (321).

6. The cylinder according to claim 5, characterized in that The pressing block (4) has an internal thread (44), and the internal thread (44) is located on the side of the third wall portion (43) away from the second wall portion (42). The main body portion (31) has an external thread (311) adapted to the internal thread (44).

7. The cylinder according to any one of claims 3 to 6, characterized in that: The cylinder includes a magnetic part (5), the magnetic part (5) is sleeved on the main body (31), the cylinder includes a first stop part (6), the first stop part (6) protrudes from the main body (31), and the magnetic part (5) is located between the pressure block (4) and the first stop part (6).

8. The cylinder according to claim 6, characterized in that The first stopper (6) has a first accommodating groove (61), the first accommodating groove (61) is recessed in a wall portion of the first stopper (6) away from the main body (31), the cylinder includes a first sealing member (71), a portion of the first sealing member (71) is located in the first accommodating groove (61), and the first sealing member (71) is located between a bottom wall of the first accommodating groove (61) and the first cylinder body (1).

9. The cylinder according to any one of claims 1 to 6, characterized in that: The piston rod (2) has a second accommodating groove (23), the second accommodating groove (23) is recessed in the outer peripheral wall of the piston rod (2), and the second accommodating groove (23) is located on the side of the first groove (21) close to the second groove (22). The cylinder includes a second sealing member (72), and the second sealing member (72) is partially located in the second accommodating groove (23). The second sealing member (72) is located between the main body (31) and the bottom wall of the second accommodating groove (23).

10. The cylinder according to claim 9, characterized in that The cylinder comprises a first end cover (73), the piston rod (2) is provided with the first end cover (73), one end of the cylinder body (1) is sleeved on the first end cover (73), the first end cover (73) has a first channel (731), and the first channel (731) is communicated with the first chamber (11); The cylinder includes a second end cover (74), the piston rod (2) is passed through the second end cover (74), the other end of the cylinder body (1) is sleeved on the second end cover (74), the second end cover (74) has a second channel (741), and the second channel (741) is connected to the first chamber (11).

Images