Stroke-adjustable air cylinder

Abstract

The utility model discloses a stroke-adjustable air cylinder, which relates to the technical field of air cylinders and comprises a cylinder barrel, one end of the cylinder barrel is fixedly connected with a front end cover, the other end of the cylinder barrel is fixedly connected with a rear end cover, an inner cavity of the cylinder barrel is communicated with an inner cavity of the front end cover and an inner cavity of the rear end cover, and a telescopic component is arranged on the inner wall of the cylinder barrel. A locking assembly is arranged on the inner wall of the inner cavity of the front end cover. According to the utility model, firstly, the piston rod completely extends out, the screw rod is rotated by rotating the knob, and as the limiting strip is inserted into the limiting groove, the conical movable block can move in the movable cavity, so that the conical movable block can abut against a proper part of the fixed column to enable the fixed column to extend out; at the moment, the rear half part of the conical movable block is moved to the position between the fixed column which extends out previously and the adjacent fixed column by rotating the knob, the piston rod is completely retracted into the cylinder barrel by moving the piston in the cylinder barrel, and the conical movable block is reset to the fixed column which is propped out before by reversely rotating the knob, so that the fixed column is propped out again; and the stroke can be adjusted by matching with the clamping groove.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a cylinder with adjustable stroke. Background Art

[0002] A cylinder refers to a cylindrical metal part that guides a piston to perform linear reciprocating motion in the cylinder. Air expands in the engine cylinder to convert heat energy into mechanical energy; gas is compressed by the piston in the compressor cylinder to increase pressure.

[0003] When the existing cylinder is in use, usually, the piston can move in the cylinder through the change of gas inside the cylinder barrel, so that the piston rod extends or retracts into the cylinder barrel. However, in actual use, the effective stroke of the piston in the cylinder barrel is often fixed and unchanged, and its application range and use are limited. Therefore, it needs to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to make up for the deficiencies of the existing technology and provide a cylinder with adjustable stroke.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A cylinder with adjustable stroke, including a cylinder barrel, one end of the cylinder barrel is fixedly connected with a front end cover, the other end of the cylinder barrel is fixedly connected with a rear end cover, the inner cavity of the cylinder barrel is communicated with the inner cavities of the front end cover and the rear end cover, a telescopic component is arranged on the inner wall of the cylinder barrel, and a locking component is arranged on the inner wall of the inner cavity of the front end cover;

[0006] The locking component includes a clamping block and a clamping groove. The clamping block is fixedly installed in the inner cavity of the front end cover through a bracket. A through hole is formed through the front surface of the clamping block, and clamping grooves are formed at both ends of the outer edge of the through hole on the back surface of the clamping block. The clamping groove is a strip-shaped groove.

[0007] As described above, the telescopic component includes a piston and a piston rod. The piston is movably connected to the inner cavity of the cylinder barrel and fits with the inner cavity of the cylinder barrel. The middle of the front surface of the piston is fixedly connected with a piston rod. An adjusting component is arranged inside the piston rod, and a locking auxiliary component is arranged on the inner wall of the piston rod.

[0008] As described above, the adjusting component includes a moving cavity, a screw rod and a knob. A moving cavity is formed in the inner wall of the piston rod. An installation hole is formed at one end of the inner wall of the moving cavity, and a shaft seat is fixedly installed on the inner wall of the installation hole. A hole is formed through one end of the piston rod. The screw rod is inserted into the hole of the piston rod and one end is sleeved with the shaft seat. The other end of the screw rod is fixedly installed with a knob. Moving components are arranged on the arc surface of the screw rod and the inner wall of the moving cavity.

[0009] As mentioned above, the movable component includes a conical movable block, a limit strip and a limit groove. A threaded hole is formed through the front of the conical movable block, and the block is threadedly connected to the screw through the threaded hole. The rear half of the conical movable block is fitted with the inner wall of the movable cavity. Both ends of the arc surface of the conical movable block are fixedly connected with the limit strip. Limit grooves are formed at both ends of the inner wall of the movable cavity. The limit strip is inserted into the limit groove, and the limit strip is fitted with the inner wall of the limit groove.

[0010] As mentioned above, the locking auxiliary component includes a telescopic cavity, a limit plate and a fixed column. The interior of the piston rod is provided with a telescopic cavity, and a plurality of limit holes are formed through the arc surface of the piston rod, and the limit holes penetrate the telescopic cavity. The outer edges of the limit holes of the telescopic cavity are fixedly connected with circular rings. One end of the fixed column is arc-shaped, and a limit plate is fixedly installed on the arc surface of the fixed column. The fixed column is inserted into the limit hole placed in the telescopic cavity, and the limit plate fits with the circular ring on the outer edge of the limit hole of the telescopic cavity.

[0011] As mentioned above, a spring is fixedly connected to the top surface of the limiting plate, and one end of the spring is fixedly connected to the outer edge of the circular ring of the limiting hole on the inner wall of the telescopic cavity.

[0012] As mentioned above, both ends of the rear half of the arc-shaped surface of the conical movable block are provided with arc-shaped grooves.

[0013] Compared with the prior art, this stroke-adjustable cylinder has the following beneficial effects:

[0014] The utility model provides a card block, a card slot, a screw rod, a knob, a conical movable block, a limit strip, a limit slot, a movable cavity, a telescopic cavity and a fixed column, so that when the stroke needs to be adjusted, the piston is first moved in the cylinder barrel to fully extend the piston rod, and then the screw rod is rotated by rotating the knob. Since the limit strip is inserted into the limit slot, the conical movable block can move in the movable cavity. When the rear half of the conical movable block moves to a suitable position, the conical movable block will abut against part of the fixed column so that it can extend from the limit hole of the telescopic cavity. At this time, the rear half of the conical movable block is moved between the previously extended fixed column and the adjacent fixed column by rotating the knob, so that the fixed column can be retracted into the telescopic cavity, and then the piston is moved in the cylinder barrel to fully retract the piston rod into the cylinder barrel. At this time, the conical movable block is reset to the fixed column before being pushed out by rotating the knob in the opposite direction, so that the fixed column is pushed out again, and when the piston rod is subsequently retracted to the adjusted stroke, the fixed column will be stuck in the card slot of the card block for locking, thereby making the stroke adjustable.

[0015] 2. The utility model provides a spring and an arc groove, so that when the conical movable block does not abut against the fixed column, the fixed column can be automatically retracted into the telescopic cavity through the setting of the spring, and when the arc groove of the conical movable block moves to the position of the fixed column, the fixed column can impact the arc groove through the spring, thereby generating sound and vibration to prompt the operator that the conical movable block is in place.

[0016] Other advantages, objectives and features of the present utility model will be elaborated to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic three-dimensional structure diagram of the present utility model;

[0018] Figure 2 is a schematic sectional structure diagram of the cylinder barrel of the present utility model;

[0019] Figure 3 is a schematic sectional structure diagram of a part of the piston rod of the present utility model;

[0020] Figure 4 is of the present utility model Figure 3 partial enlarged structure diagram of A therein;

[0021] Figure 5 is of the present utility model Figure 3 partial enlarged structure diagram of B therein.

[0022] In the figure: 1, cylinder barrel; 2, front end cover; 3, rear end cover; 4, piston; 5, piston rod; 6, chuck; 7, card slot; 8, screw; 9, knob; 10, conical movable block; 11, limiting strip; 12, limiting groove; 13, fixed column; 14, limiting piece; 15, spring; 16, movable cavity; 17, telescopic cavity; 18, arc groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figures 1-5 shown, the present utility model provides a technical solution: a stroke-adjustable cylinder, including a cylinder barrel 1, one end of the cylinder barrel 1 is fixedly connected with a front end cover 2, the other end of the cylinder barrel 1 is fixedly connected with a rear end cover 3, the inner cavity of the cylinder barrel 1 is in communication with the inner cavities of the front end cover 2 and the rear end cover 3, a telescopic assembly is arranged on the inner wall of the cylinder barrel 1, and a locking assembly is arranged on the inner wall of the inner cavity of the front end cover 2;

[0025] The locking assembly includes a card block 6 and a card slot 7. The card block 6 is fixedly installed in the inner cavity of the front end cover 2 through a bracket. A through hole is penetrated through the front side of the card block 6. The back side of the card block 6 is provided with card slots 7 at both ends of the outer edge of the through hole. The card slot 7 is a strip-shaped groove.

[0026] According to the overall structure of the device, when the stroke needs to be adjusted, the piston 4 is first moved in the cylinder 1 to fully extend the piston rod 5, and then the screw 8 is rotated by rotating the knob 9. Since the limit bar 11 is inserted into the limit groove 12, the conical movable block 10 moves in the movable cavity 16. When the rear half of the conical movable block 10 moves to a suitable position, the conical movable block 10 will resist part of the fixed column 13 so that it can extend from the limit hole of the telescopic cavity 17. At this time, the rear half of the conical movable block 10 is moved between the previously extended fixed column 13 and the adjacent fixed column 13 by rotating the knob 9. The fixed column 13 is retracted to the telescopic chamber 17 by the elastic force of the spring 15, and then the piston 4 moves in the cylinder 1 to completely retract the piston rod 5 into the cylinder 1. At this time, the conical movable block 10 is reset by rotating the knob 9 in the opposite direction, and the arc groove 18 is moved to the previous fixed column 13, so that the fixed column 13 impacts the arc groove 18 through the spring 15, thereby generating sound and vibration to prompt the operator that the conical movable block 10 is in place, so that the fixed column 13 is pushed out again, so that when the piston rod 5 is subsequently retracted to the adjusted stroke, the fixed column 13 will be stuck in the slot 7 of the block 6 and locked, so that the stroke can be adjusted.

[0027] like Figures 1-2 As shown, the telescopic assembly includes a piston 4 and a piston rod 5. The piston 4 is movably connected to the inner cavity of the cylinder 1 and fits with the inner cavity of the cylinder 1. The piston rod 5 is fixedly connected to the middle end of the front side of the piston 4. An adjustment assembly is arranged inside the piston rod 5, and a locking auxiliary assembly is arranged on the inner wall of the piston rod 5.

[0028] By providing the piston 4 and the piston rod 5, when the gas inside the cylinder 1 changes, the piston 4 can move in the cylinder 1, thereby extending or retracting the piston rod 5.

[0029] like Figures 2-5As shown in the figure, the adjusting component includes a movable cavity 16, a screw rod 8 and a knob 9. An inner wall of the piston rod 5 is provided with the movable cavity 16. One end of the inner wall of the movable cavity 16 is provided with a mounting hole, and a shaft seat is fixedly installed on the inner wall of the mounting hole. One end of the piston rod 5 is penetrated with a hole. The screw rod 8 is inserted into the hole of the piston rod 5, and one end thereof is sleeved with the shaft seat. The other end of the screw rod 8 is fixedly installed with the knob 9. The arc surfaces of the screw rod 8 and the inner wall of the movable cavity 16 are both provided with movable components. The movable component includes a conical movable block 10, a limiting strip 11 and a limiting groove 12. A threaded hole is penetrated through the front surface of the conical movable block 10, and the conical movable block 10 is threadedly connected with the screw rod 8 through the threaded hole. The rear half part of the conical movable block 10 is attached to the inner wall of the movable cavity 16. Both ends of the arc surface of the conical movable block 10 are fixedly connected with the limiting strips 11. Limiting grooves 12 are opened at both ends of the inner wall of the movable cavity 16. The limiting strips 11 are inserted into the limiting grooves 12, and the limiting strips 11 are attached to the inner walls of the limiting grooves 12.

[0030] By providing the movable cavity 16, the screw rod 8, the knob 9, the conical movable block 10, the limiting strip 11 and the limiting groove 12, the screw rod 8 can be rotated by rotating the knob 9, and since the limiting strip 11 is inserted into the limiting groove 12, the conical movable block 10 moves in the movable cavity 16.

[0031] As Figures 4-5 shown in the figure, the locking auxiliary component includes a telescopic cavity 17, a limiting piece 14 and a fixing column 13. A telescopic cavity 17 is opened inside the piston rod 5. A plurality of limiting holes are penetrated through the arc surface of the piston rod 5, and the limiting holes penetrate through the telescopic cavity 17. Rings are fixedly connected to the outer eaves of the limiting holes of the telescopic cavity 17. One end of the fixing column 13 is arc-shaped, and a limiting piece 14 is fixedly installed on the arc surface of the fixing column 13. The fixing column 13 is inserted into the limiting holes placed in the telescopic cavity 17, and the limiting piece 14 is attached to the ring on the outer eaves of the limiting holes of the telescopic cavity 17.

[0032] By providing the telescopic cavity 17, the limiting piece 14 and the fixing column 13, when the rear half part of the conical movable block 10 moves to a proper position, the conical movable block 10 will resist a part of the fixing column 13, so that the fixing column 13 can extend out of the limiting holes of the telescopic cavity 17.

[0033] As Figures 4-5 shown in the figure, a spring 15 is fixedly connected to the top surface of the limiting piece 14, and one end of the spring 15 is fixedly connected to the outer eaves of the ring of the limiting hole on the inner wall of the telescopic cavity 17. Arc-shaped grooves 18 are opened at both ends of the rear half of the arc surface of the conical movable block 10.

[0034] Through the provided spring 15 and arc-shaped groove 18, when the conical movable block 10 does not abut against the fixed column 13, the fixed column 13 can be automatically retracted into the telescopic cavity 17 by the setting of the spring 15. And when the arc-shaped groove 18 of the conical movable block 10 moves to the position of the fixed column 13, the fixed column 13 can impact the arc-shaped groove 18 through the spring 15, thereby generating sound and vibration to prompt the operator that the conical movable block 10 is in place.

[0035] Working principle: When adjusting the stroke, first move the piston 4 in the cylinder barrel 1 to fully extend the piston rod 5, and then rotate the knob 9 to rotate the screw rod 8. Since the limiting strip 11 is inserted into the limiting groove 12, the conical movable block 10 moves in the movable cavity 16. When the rear half of the conical movable block 10 moves to a suitable position, the conical movable block 10 will abut against a part of the fixed column 13, enabling it to extend out of the limiting hole of the telescopic cavity 17. At this time, rotate the knob 9 again to move the rear half of the conical movable block 10 between the previously extended fixed column 13 and the adjacent fixed column 13, so that the fixed column 13 is retracted into the telescopic cavity 17 by the elastic force of the spring 15. Then, move the piston 4 in the cylinder barrel 1 to fully retract the piston rod 5 into the cylinder barrel 1. At this time, rotate the knob 9 in the reverse direction to reset the conical movable block 10 and move the arc-shaped groove 18 to the previous fixed column 13, allowing the fixed column 13 to impact the arc-shaped groove 18 through the spring 15, thereby generating sound and vibration to prompt the operator that the conical movable block 10 is in place, causing the fixed column 13 to be abutted out again. When the piston rod 5 extends and retracts to the adjusted stroke later, the fixed column 13 will be stuck in the card slot 7 of the clamping block 6 for locking.

[0036] It should be noted that in this article, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "fixedly installed", "installed", "connected", "connected" should be understood in a broad sense. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "connected" can be a direct connection, an indirect connection through an intermediate medium, or a communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A stroke-adjustable cylinder, comprising a cylinder barrel (1), characterized in that: One end of the cylinder barrel (1) is fixedly connected with a front end cover (2), the other end of the cylinder barrel (1) is fixedly connected with a rear end cover (3), the inner cavity of the cylinder barrel (1) is in communication with the inner cavities of the front end cover (2) and the rear end cover (3), a telescopic component is arranged on the inner wall of the cylinder barrel (1), and a locking component is arranged on the inner wall of the inner cavity of the front end cover (2); The locking component includes a clamping block (6) and a clamping groove (7). The clamping block (6) is fixedly installed in the inner cavity of the front end cover (2) through a bracket. A through hole is formed through the front surface of the clamping block (6), and clamping grooves (7) are formed at both ends of the outer edge of the through hole on the back surface of the clamping block (6). The clamping groove (7) is a strip-shaped groove.

2. The stroke-adjustable cylinder according to claim 1, wherein: The telescopic component includes a piston (4) and a piston rod (5). The piston (4) is movably connected to the inner cavity of the cylinder barrel (1) and fits with the inner cavity of the cylinder barrel (1). The middle of the front surface of the piston (4) is fixedly connected with a piston rod (5). An adjusting component is arranged inside the piston rod (5), and a locking auxiliary component is arranged on the inner wall of the piston rod (5).

3. The stroke-adjustable cylinder according to claim 2, wherein: The adjusting component includes a movable cavity (16), a screw rod (8) and a knob (9). A movable cavity (16) is formed in the inner wall of the piston rod (5). An installation hole is formed at one end of the inner wall of the movable cavity (16), and a shaft seat is fixedly installed on the inner wall of the installation hole. A hole is formed through one end of the piston rod (5). The screw rod (8) is inserted into the hole of the piston rod (5) and is sleeved with the shaft seat at one end. The other end of the screw rod (8) is fixedly installed with a knob (9). Movable components are arranged on the arc surface of the screw rod (8) and the inner wall of the movable cavity (16).

4. The stroke-adjustable cylinder according to claim 3, characterized in that: The movable component includes a conical movable block (10), a limiting strip (11) and a limiting groove (12). A threaded hole is formed through the front surface of the conical movable block (10), and the conical movable block (10) is threadedly connected with the screw rod (8) through the threaded hole. The latter half of the conical movable block (10) fits with the inner wall of the movable cavity (16). Limiting strips (11) are fixedly connected to both ends of the arc surface of the conical movable block (10). Limiting grooves (12) are formed at both ends of the inner wall of the movable cavity (16). The limiting strip (11) is inserted into the limiting groove (12), and the limiting strip (11) fits with the inner wall of the limiting groove (12).

5. The stroke-adjustable cylinder according to claim 2, wherein: The locking auxiliary component includes a telescopic cavity (17), a limiting piece (14) and a fixing column (13). A telescopic cavity (17) is formed inside the piston rod (5). A plurality of limiting holes are formed through the arc surface of the piston rod (5), and the limiting holes penetrate through the telescopic cavity (17). Rings are fixedly connected to the outer edges of the limiting holes of the telescopic cavity (17). One end of the fixing column (13) is arc-shaped, and a limiting piece (14) is fixedly installed on the arc surface of the fixing column (13). The fixing column (13) is inserted into the limiting hole placed in the telescopic cavity (17), and the limiting piece (14) fits with the ring on the outer edge of the limiting hole of the telescopic cavity (17).

6. The stroke-adjustable cylinder according to claim 5, wherein: A spring (15) is fixedly connected to the top surface of the limiting piece (14), and one end of the spring (15) is fixedly connected to the outer edge of the ring of the limiting hole on the inner wall of the telescopic cavity (17).

7. The stroke-adjustable cylinder according to claim 4, characterized in that: Both ends of the rear half of the arc-shaped surface of the conical movable block (10) are provided with arc-shaped grooves (18).

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