Air cylinder with self-locking function

Abstract

The utility model discloses an air cylinder with a self-locking function, which belongs to the technical field of air cylinders and comprises a shell, an air inlet pipe and a reset air pipe. A piston is slidably connected into the shell, and the upper end of the piston is fixedly connected with a piston rod. A cylinder body is fixedly connected into the shell; the lock cylinder rod is mounted in a second straight hole formed in the middle of the piston rod; the side wall of the piston rod is provided with a plurality of groups of circular grooves for cooperatively containing the balls. A first straight hole matched with the upper part of the piston rod to vertically move is formed in the upper end of the cylinder body; the lock cylinder rod is further provided with a side groove matched with the embedding ball and the pushing ball. An inclined groove used for limiting the ball when the air cylinder is locked is formed in the upper end of the second straight hole. By means of the mode, self-locking equipment does not need to be additionally arranged, the self-locking structure is simple, stability is good, cost is low, and the space utilization rate is high.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, and particularly relates to a cylinder with a self-locking function. Background Art

[0002] At present, the cylinder structures on the market are diverse, but there are few devices that add a self-locking function to their structures. Generally, additional self-locking devices need to be added to make the cylinder have a self-locking function. For example, CN115140634A. However, there are problems such as high cost and poor space utilization.

[0003] For a complex working environment with safety risks, if the self-locking function is concentrated on one device, it is undoubtedly a great improvement in terms of cost savings and space utilization.

[0004] Based on this, the utility model designs a cylinder with a self-locking function to solve the above problems. Content of the Utility Model

[0005] Aiming at the above-mentioned shortcomings of the prior art, the utility model provides a cylinder with a self-locking function.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0007] A cylinder with a self-locking function includes a housing;

[0008] An air inlet pipe for air intake and a reset air pipe are respectively fixedly connected to the lower end and the side wall of the housing;

[0009] A piston is slidably connected inside the housing, and the upper end of the piston is fixedly connected to a piston rod;

[0010] A cylinder block is fixedly connected inside the housing;

[0011] A lock core spring is installed at the upper end inside the piston rod, and a lock core rod is installed in a second straight hole opened in the middle of the piston rod;

[0012] A number of groups of circular grooves for accommodating balls are opened on the side wall of the piston rod;

[0013] A first straight hole for the vertical movement of the upper part of the piston rod is opened inside the upper end of the cylinder block; horizontal air holes for cooperating with the reset air pipe are opened on the side walls of both the cylinder block and the piston rod;

[0014] A side groove for fitting and embedding the ball and pushing the ball is also opened on the lock core rod;

[0015] An inclined groove for limiting the ball when the cylinder is locked is opened inside the upper end of the second straight hole;

[0016] A piston rod spring is installed on the inner wall at the lower end of the cylinder block.

[0017] Furthermore, when the piston moves upward to contact the bottom of the cylinder block, it is blocked by the cylinder block, and the piston rod is slidably connected to the cylinder block.

[0018] Furthermore, the lower end of the lock core spring is embedded and fixedly connected to the top of the lock core rod.

[0019] Furthermore, the inner diameter of the circular groove is slightly larger than the diameter of the spherical ball.

[0020] Furthermore, the inner diameter of the first straight hole is larger than the inner diameter of the second straight hole.

[0021] Furthermore, the upper end and the middle part of the lock core rod are both in sliding fit with the second straight hole.

[0022] Furthermore, the side groove is located between the upper end and the middle part of the lock core rod.

[0023] Furthermore, the inner wall at the upper end of the side groove is an inclined surface, and the inner wall at the lower end is a horizontal surface; when the spherical ball is located inside the inclined groove, the reset air pipe, the horizontal air hole on the cylinder block, and the horizontal air hole on the piston rod are connected and communicated.

[0024] Furthermore, when the spherical ball is located inside the inclined groove, the piston contacts the bottom of the cylinder block and is blocked by the cylinder block.

[0025] Furthermore, the upper and lower ends of the piston rod spring are respectively fixedly connected to the cylinder block and the piston; the upper and lower ends of the lock core spring are respectively fixedly connected to the inner wall of the piston rod and the top of the lock core rod.

[0026] The beneficial effects of the present utility model compared with the prior art are as follows:

[0027] The extending principle of the present utility model: Air enters the housing from the air inlet pipe, pushing the piston to move upward, compressing the piston rod spring upward. The cylinder block guides the movement of the piston through the spring tension of the piston rod spring. The piston drives the piston rod to move upward and extend. The piston rod drives the spherical ball to move upward to the inside of the inclined groove through the circular groove. At this time, the piston moves upward to contact the bottom of the cylinder block and is blocked by the cylinder block. The reset air pipe, the horizontal air hole on the cylinder block, and the horizontal air hole on the piston rod are connected and communicated. The air pressure in the second straight hole is released through the reset air pipe. The lock core rod moves downward under the elastic force of the lock core spring. The lock core rod pushes the spherical ball to gradually move toward the inclined groove through the inclined surface of the inner wall at the upper end of the side groove until the spherical ball is completely misaligned with the side groove, and the spherical ball contacts the outer wall at the upper end of the lock core rod; the spherical ball is stuck at the inclined groove of the cylinder block; at this time, if the piston rod moves downward, since the spherical ball is limited by the lock core rod and the inclined groove and cannot move inward, outward, or downward, the piston rod cannot move downward, thus achieving locking;

[0028] The return unlocking principle of the present utility model: When air enters the reset air pipe, it is then transmitted to the lower part of the second straight hole through the horizontal air holes on the cylinder block and the horizontal air holes on the piston rod, pushing the lock core rod upward to compress the lock core spring until the side groove moves to the inner side of the spherical ball. By releasing the air pressure through the air inlet pipe, the piston rod and the piston move downward to the proper position under the elastic force of the piston rod spring. When the spherical ball moves downward, it is pushed by the inclined groove to be embedded inside the side groove, thereby completing the return of the cylinder to achieve the unlocking action.

[0029] The present utility model does not require additional self-locking devices, and the self-locking structure is simple, has good stability, low cost, and high space utilization rate. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a three-dimensional view of a cylinder with a self-locking function of the present utility model;

[0032] Figure 2 It is a front view of a cylinder with a self-locking function of the present utility model;

[0033] Figure 3 It is a left view of a cylinder with a self-locking function of the present utility model;

[0034] Figure 4 It is a sectional view along the Figure 3 A-A direction;

[0035] Figure 5 It is a schematic diagram of the cylinder in the self-locking state;

[0036] Figure 6 It is a schematic diagram of the cylinder in the non-self-locking state.

[0037] The reference numerals in the drawings respectively represent:

[0038] 1. Outer shell 2. Reset air pipe 3. Air inlet pipe 4. Piston rod 5. First straight hole 6. Lock core spring 7. Circular groove 8. Spherical ball 9. Cylinder block 10. Horizontal air hole 11. Inclined groove 12. Second straight hole 13. Piston rod spring 14. Piston 15. Lock core rod 16. Side groove. Detailed Embodiment

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are a part rather than all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0040] In the following description, the "left", "right", "front", "rear", "upper", and "lower" mentioned are oriented in the perspective direction of the front view. Embodiment 1

[0041] In some embodiments, please refer to the specification appendix Figures 1-6 , a cylinder with a self-locking function, including a housing 1;

[0042] An air inlet pipe 3 for air intake and a return air pipe 2 are respectively fixedly connected to the lower end and the side wall of the housing 1;

[0043] A piston 14 is slidably connected inside the housing 1, and the upper end of the piston 14 is fixedly connected to a piston rod 4;

[0044] A cylinder block 9 is fixedly connected inside the housing 1. When the piston 14 moves upward to contact the bottom of the cylinder block 9, it is blocked by the cylinder block 9; the piston rod 4 is slidably connected to the cylinder block 9;

[0045] A lock core spring 6 is installed at the upper end inside the piston rod 4. The upper and lower ends of the lock core spring 6 are respectively fixedly connected to the inner wall of the piston rod 4 and the top of the lock core rod 15. The lock core rod 15 is installed in a second straight hole 12 opened in the middle of the piston rod 4;

[0046] Preferably, the lower end of the lock core spring 6 is embedded and fixedly connected to the top of the lock core rod 15;

[0047] A plurality of groups of circular grooves 7 for accommodating balls 8 in cooperation are opened on the side wall of the piston rod 4;

[0048] Preferably, the inner diameter of the circular groove 7 is slightly larger than the diameter of the ball 8;

[0049] A first straight hole 5 for the upper vertical movement of the upper part of the piston rod 4 is opened inside the upper end of the cylinder block 9; the inner diameter of the first straight hole 5 is larger than the inner diameter of the second straight hole 12;

[0050] Horizontal air holes 10 for cooperating with the return air pipe 2 are opened on the side walls of both the cylinder block 9 and the piston rod 4;

[0051] Preferably, the upper end and the middle part of the lock core rod 15 are in sliding connection with the second straight hole 12 in a fitting manner;

[0052] A side groove 16 for fitting and embedding the ball 8 and pushing the ball 8 is further formed on the lock core rod 15, and the side groove 16 is located between the upper end and the middle part of the lock core rod 15;

[0053] The inner wall of the upper end of the side groove 16 is an inclined surface, and the inner wall of the lower end is a horizontal surface;

[0054] When the reset air pipe 2, the horizontal air hole 10 on the cylinder block 9, and the horizontal air hole 10 on the piston rod 4 are connected and communicated, the gas is transmitted to the lower part of the second straight hole 12 through the horizontal air hole 10 by the reset air pipe 2;

[0055] An inclined groove 11 for limiting the ball 8 when the cylinder is locked is formed inside the upper end of the second straight hole 12;

[0056] A piston rod spring 13 is installed on the inner wall of the lower end of the cylinder block 9, and the upper and lower ends of the piston rod spring 13 are fixedly connected to the cylinder block 9 and the piston 14 respectively;

[0057] Extension principle: Air enters the housing 1 from the air inlet pipe 3, pushes the piston 14 to move upward, the piston rod spring 13 is compressed upward, the cylinder block 9 guides the movement of the piston 14 through the spring tension of the piston rod spring 13, the piston 14 drives the piston rod 4 to move upward and extend, the piston rod 4 drives the ball 8 to move upward to the inside of the inclined groove 11 through the circular groove 7. At this time, the piston 14 moves upward to contact the bottom of the cylinder block 9 and is blocked by the cylinder block 9. The reset air pipe 2, the horizontal air hole 10 on the cylinder block 9, and the horizontal air hole 10 on the piston rod 4 are connected and communicated. The air pressure in the second straight hole 12 is released through the reset air pipe 2. The lock core rod 15 moves downward under the elastic force of the lock core spring 6. The lock core rod 15 pushes the ball 8 to gradually move toward the inclined groove 11 through the inclined surface of the inner wall of the upper end of the side groove 16 until the ball 8 is completely misaligned with the side groove 16, and the ball 8 contacts the outer wall of the upper end of the lock core rod 15; the ball 8 is stuck at the inclined groove 11 of the cylinder block 9;

[0058] At this time, if the piston rod 4 moves downward, since the ball 8 is limited by the lock core rod 15 and the inclined groove 11 and cannot move inward, outward, or downward, the piston rod 4 cannot move downward, thus realizing locking;

[0059] Retraction and unlocking principle: When air enters the reset air pipe 2 and then is transmitted to the lower part of the second straight hole 12 through the horizontal air hole 10 on the cylinder block 9 and the horizontal air hole 10 on the piston rod 4, it pushes the lock core rod 15 to move upward, compressing the lock core spring 6 until the side groove 16 moves to the inside of the ball 8. The air pressure is released through the air inlet pipe 3. The piston rod 4 and the piston 14 move downward to the position under the elastic force of the piston rod spring 13. When the ball 8 moves downward, it is pushed by the inclined groove 11 to be embedded inside the side groove 16, thereby realizing the retraction of the cylinder and completing the unlocking action.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A cylinder with a self-locking function, comprising a housing (1), characterized in that: An air intake pipe (3) and a reset air pipe (2) for air intake are respectively fixedly connected to the lower end and the side wall of the housing (1); A piston (14) is slidably connected to the interior of the housing (1), and the upper end of the piston (14) is fixedly connected to the piston rod (4); A cylinder body (9) is fixedly connected to the interior of the housing (1); A lock core spring (6) is installed at the inner upper end of the piston rod (4), and the lock core rod (15) is installed in a second straight hole (12) opened in the middle of the piston rod (4); A plurality of groups of circular grooves (7) for accommodating the balls (8) are provided on the side wall of the piston rod (4); A first straight hole (5) is provided inside the upper end of the cylinder body (9) to cooperate with the vertical movement of the upper part of the piston rod (4); and transverse air holes (10) are provided on the side walls of the cylinder body (9) and the piston rod (4) to cooperate with the reset air pipe (2); The lock core rod (15) is also provided with a side groove (16) for fitting into the embedded ball (8) and pushing the ball (8); An inclined groove (11) is provided inside the upper end of the second straight hole (12) for limiting the position of the ball (8) when the cylinder is locked; A piston rod spring (13) is mounted on the inner wall of the lower end of the cylinder body (9).

2. The cylinder with self-locking function according to claim 1, characterized in that: When the piston (14) moves upward and contacts the bottom of the cylinder body (9), it is blocked by the cylinder body (9), and the piston rod (4) is slidably connected to the cylinder body (9).

3. The cylinder with self-locking function according to claim 2, characterized in that: The lower end of the lock core spring (6) is embedded and fixedly connected to the top of the lock core rod (15).

4. The cylinder with self-locking function according to claim 3, characterized in that: The inner diameter of the circular groove (7) is greater than the diameter of the sphere (8).

5. The cylinder with self-locking function according to claim 4, characterized in that: The inner diameter of the first straight hole (5) is greater than the inner diameter of the second straight hole (12).

6. The cylinder with self-locking function according to claim 5, characterized in that: The upper end and the middle portion of the lock core rod (15) are both in close contact and sliding connection with the second straight hole (12).

7. The cylinder with self-locking function according to claim 6, characterized in that: The side groove (16) is located between the upper end and the middle part of the lock core rod (15).

8. The cylinder with self-locking function according to claim 7, characterized in that: The upper inner wall of the side groove (16) is an inclined surface, and the lower inner wall is a horizontal surface; when the ball (8) is located inside the inclined groove (11), the reset air pipe (2), the transverse air hole (10) on the cylinder body (9), and the transverse air hole (10) on the piston rod (4) are connected.

9. The cylinder with self-locking function according to claim 8, characterized in that: When the ball (8) is located inside the inclined groove (11), the piston (14) contacts the bottom of the cylinder body (9) and is blocked by the cylinder body (9).

10. The cylinder with self-locking function according to claim 9, characterized in that: The upper and lower ends of the piston rod spring (13) are fixedly connected to the cylinder body (9) and the piston (14) respectively; the upper and lower ends of the lock core spring (6) are fixedly connected to the inner wall of the piston rod (4) and the top of the lock core rod (15) respectively.

Images