Quick adjusting type air cylinder

Abstract

The utility model relates to the technical field of air cylinders, in particular to a fast adjusting type air cylinder which comprises a piston rod, a piston body, an end cover, a locking sleeve, a cylinder body and an adjusting device, the locking sleeve comprises steel balls and a spring, the locking sleeve is assembled on an adjusting cylinder barrel, six holes are formed in the end, close to the piston rod, of the adjusting cylinder barrel, the steel balls are arranged in the six holes respectively, and the spring is arranged in the adjusting cylinder barrel. The locking sleeve blocks the six steel balls in the six holes, the spring pushes the locking sleeve to lock the steel balls, the adjusting device comprises an adjusting piston, a pull pipe, an adjusting cylinder barrel, a lining and a gland, the adjusting cylinder barrel is arranged on the cylinder body in a sleeving mode, the adjusting piston is arranged in the cylinder body, and the lining is arranged on the adjusting piston. The adjusting piston, the gland and the adjusting cylinder barrel are connected into a whole through the pull pipe and fastened through the nut and the gasket, and the bush is pressed by the gland. The adjusting device and the cylinder body can freely slide in the axial direction, when the adjusting device is adjusted to the needed position, the locking sleeve is loosened, the locking sleeve presses the steel ball into the groove of the cylinder body under the action of the spring, and therefore the stroke of the air cylinder is locked.

Description

Technical Field

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

[0002] Cylinders are widely used in industrial production, and many execution parts of equipment use cylinders. In many occasions, the cylinders need to be adjusted in stroke appropriately. Many mechanical moving parts have certain requirements for the amplitude of movement. At this time, adjusting the stroke can effectively adjust the amplitude of movement.

[0003] The existing related technologies often have the following defects: Currently, many cylinders cannot change the movement amplitude by adjusting the stroke using conventional means. Therefore, the advantages of cylinders that can adjust the stroke and adjust quickly can be fully reflected.

[0004] Therefore, the utility model provides a quick-adjustable cylinder. Content of the Utility Model

[0005] The purpose of the utility model is to solve the defect that currently many cylinders cannot change the movement amplitude by adjusting the stroke using conventional means in the prior art, and to propose a quick-adjustable cylinder.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A quick-adjustable cylinder, including a piston rod, a piston body, end caps, a locking sleeve, a cylinder body and an adjusting device. The locking sleeve includes steel balls and springs. The locking sleeve is assembled on an adjusting cylinder barrel. There are six holes at one end of the adjusting cylinder barrel close to the piston rod. The steel balls are respectively placed in these six holes. The locking sleeve blocks the six steel balls in the six holes. The spring pushes the locking sleeve to lock the steel balls. The adjusting device includes an adjusting piston, a pull rod, an adjusting cylinder barrel, a bushing and a gland. The adjusting cylinder barrel is sleeved on the cylinder body. The adjusting piston is placed inside the cylinder body. The pull rod connects the adjusting piston, the gland and the adjusting cylinder barrel into a whole and is fastened with nuts and gaskets. The gland presses the bushing, and the bushing presses the spring.

[0007] Preferably, the adjusting cylinder barrel slides axially along the cylinder body. The adjusting piston moves synchronously with the adjusting cylinder barrel. When the adjusting piston approaches the end cap, the stroke of the cylinder decreases. When the adjusting piston moves away from the end cap, the stroke of the cylinder increases.

[0008] Preferably, a locking sleeve is installed at one end of the adjusting cylinder barrel close to the end cap. In the natural state, the locking sleeve is pushed by the spring pressure, and the steel balls are pressed into the grooves on the outer circle of the cylinder body. In this state, the adjusting cylinder barrel is locked and cannot slide. Move the locking sleeve towards the gland, and the adjusting cylinder barrel slides axially along the cylinder body. When it slides to the position that needs to be adjusted, release the locking sleeve, and the adjusting cylinder barrel is locked again.

[0009] Preferably, there are N grooves with circular arc cross-sections arranged on the outer periphery of the cylinder block. The grooves with circular arc cross-sections are used in cooperation with steel balls. The grooves and the steel balls have the same curvature, and the distances between adjacent grooves with circular arc cross-sections are equal.

[0010] Preferably, the adjusting piston includes a second guide ring, a second screw, and a retaining ring. The adjusting piston is fixed to one end of the pull rod through the retaining ring and sealed with an O-ring. The second screw fastens the retaining ring to the adjusting piston. The adjusting piston has a circular groove on the side facing the end cover. The piston body includes a third sealing ring, a first sealing ring, a second sealing ring, and a circular ring with a protrusion on the side facing the adjusting piston. The piston body has a circular groove on the other side. The end cover includes a dust-proof ring, a first guide ring, and a first screw. The end cover has a circular ring with a protrusion on the side facing the cylinder block.

[0011] Preferably, when the piston body moves towards the end cover and is about to come into contact, under the sealing action of Seal A and Seal B, a sealed cavity is formed between the circular groove of the piston body and the circular ring with a protrusion of the end cover, and the piston body obtains buffering.

[0012] In summary:

[0013] In the present utility model, there are many implementation manners for the quick-adjustable cylinder, and it can be applied to many occasions. In this embodiment, the stroke can be quickly adjusted. In the initial state, the locking sleeve presses the steel balls into the outer circular grooves of the cylinder block, and the adjusting cylinder barrel and the cylinder block cannot slide axially. When the locking sleeve is moved towards the gland, until the steel balls are no longer under the pressure of the locking sleeve, when an external force pushes the cylinder block or the adjusting cylinder (or adjusting device), the adjusting device and the cylinder block can slide axially arbitrarily. When the required position is adjusted, the locking sleeve is loosened, and the locking sleeve presses the steel balls into the grooves of the cylinder block under the action of the spring, thereby locking the cylinder stroke. Description of the Drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a sectional view of the present utility model.

[0016] Legend: 001, piston rod; 002, end cover; 003, cylinder block; 004, locking sleeve; 005, bushing; 006, nut; 007, gasket; 008, gland; 009, adjusting device; 010, adjusting cylinder barrel;

[0017] 011, groove; 012, spring; 013, steel ball; 014, first sealing ring; 015, second sealing ring;

[0018] 016. Third sealing ring; 017. A seal; 018. B seal; 019. First screw; 020. Dust-proof ring; 021. First guide ring; 024. Piston body; 027. Second screw; 028. Retaining ring; 029. Second guide ring; 031. Adjusting piston; 032. O-ring; 033. Pulling tube. Detailed implementation manner

[0019] Referring to Figure 1-2 As shown, the present utility model provides a technical solution: a quick-adjustable cylinder, comprising a piston rod 001, a piston body 024, an end cover 002, a locking sleeve 004, a cylinder block 003 and an adjusting device 009.

[0020] The following specifically describes its overall specific settings and functions.

[0021] In this implementation scheme: the locking sleeve 004 includes steel balls 013 and a spring 012. The locking sleeve 004 is assembled on the adjusting cylinder barrel 010. There are six holes at one end of the adjusting cylinder barrel 010 close to the piston rod 001. The steel balls 013 are respectively placed in these six holes. The locking sleeve 004 blocks the six steel balls 013 in the six holes. The spring 012 pushes the locking sleeve 004 to lock the steel balls 013. The adjusting device 009 includes an adjusting piston 031, a pulling tube 033, an adjusting cylinder barrel 010, a bushing 005 and a gland 008. The adjusting cylinder barrel 010 is sleeved on the cylinder block 003. The adjusting piston is placed inside the cylinder block 003. The pulling tube 033 connects the adjusting piston 031, the gland 008 and the adjusting cylinder barrel 010 into a whole and is fastened with a nut 006 and a gasket 007. The gland 008 presses the bushing 005, and the bushing 005 presses the spring 012.

[0022] Specifically, the adjusting cylinder barrel 010 slides axially along the cylinder block 003. The adjusting piston 031 moves synchronously with the adjusting cylinder barrel 010. When the adjusting piston 031 approaches the end cover 002, the cylinder stroke decreases. When the adjusting piston 031 moves away from the end cover 002, the cylinder stroke increases. A locking sleeve 004 is installed at one end of the adjusting cylinder barrel 010 close to the end cover 002. In the natural state, the locking sleeve 004 is pushed by the pressure of the spring 012, and the steel ball 013 is pressed into the groove on the outer circle of the cylinder block 003. In this state, the adjusting cylinder barrel 010 is locked and cannot slide. Move the locking sleeve 004 towards the gland 008, and the adjusting cylinder barrel 010 slides axially along the cylinder block 003. When it slides to the position that needs to be adjusted, release the locking sleeve 004, and the adjusting cylinder barrel 010 is locked again. There are N grooves 011 with circular arc cross-sections on the outer circle of the cylinder block 003. The grooves 011 with circular arc cross-sections are used in cooperation with the steel balls 013. The grooves 011 and the steel balls 013 have the same curvature, and the distances between adjacent grooves 011 with circular arc cross-sections are equal. The adjusting piston 031 includes a second guide ring 029, a second screw 027 and a retaining ring 028. The adjusting piston 031 is fixed to one end of the pull rod 033 through the retaining ring 028 and sealed with an O-ring 032. The second screw 027 fastens the retaining ring 028 to the adjusting piston 031. There is a circular groove on the side of the adjusting piston 031 facing the end cover 002. The piston body 024 includes a third sealing ring 016, a first sealing ring 014, a second sealing ring 015, and a circular ring with a protrusion on the side facing the adjusting piston 031. There is a circular groove on the other side of the piston body 024. The end cover 002 includes a dust-proof ring 020, a first guide ring 021 and a first screw 019. There is a circular ring with a protrusion on the side of the end cover 002 facing the cylinder block 003. When the piston body 024 moves towards the end cover 002 and is about to contact, under the sealing action of the A seal 017 and the B seal 018, a sealed cavity is formed between the circular groove of the piston body 024 and the circular ring with a protrusion of the end cover 002, and the piston body 024 obtains buffering.

[0023] Working principle: A lock sleeve 004 that can be locked is installed on the adjusting device 009. When the lock sleeve 004 is pushed, the adjusting device 009 can slide axially on the cylinder block 003. When the lock sleeve 004 is loosened, the adjusting device 009 will be locked at the position of the groove 011 on the circular arc section of the current cylinder block 003. Pushing the lock sleeve 004 can achieve any stroke adjustment of the cylinder. When the cylinder reciprocates, there is buffering when the piston contacts the end cover 002 or the adjusting piston 031. The groove 011 with a circular arc section is used in cooperation with the steel ball 013. The distances between adjacent grooves 011 with a circular arc section are equal. The smaller the distance, the higher the adjustment accuracy. The larger N is, the larger the adjustable range is. The lock sleeve 004 presses the steel ball 013 into the groove 011 of the cylinder block 003, and the adjusting cylinder barrel 010 and the cylinder block 003 cannot slide axially. At this time, the cylinder stroke is locked. When an external force pushes the lock sleeve 004 to a certain position, the steel ball 013 can move radially, and the adjusting cylinder barrel 010 can slide axially arbitrarily. There are many implementation methods for the quick-adjustable cylinder, and it can be applied in many occasions. In this embodiment, the stroke can be quickly adjusted. In the initial state, the lock sleeve 004 presses the steel ball 013 into the outer circular groove 011 of the cylinder block 003, and the adjusting cylinder barrel 010 and the cylinder block 003 cannot slide axially. When the lock sleeve 004 is moved towards the gland 008, until the steel ball 013 is not under the pressure of the lock sleeve 004, when an external force pushes the cylinder block 003 or the adjusting cylinder or the adjusting device 009, the adjusting device 009 and the cylinder block 003 can slide axially arbitrarily. When adjusted to the required position, the lock sleeve 004 is loosened, and the lock sleeve 004 presses the steel ball 013 into the groove 011 of the cylinder block 003 under the action of the spring 012, thereby locking the cylinder stroke.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

Claims

1. A quick-adjustable cylinder, comprising a piston rod (001), a piston body (024), an end cover (002), a locking sleeve (004), a cylinder body (003) and an adjusting device (009), characterized in that: The locking sleeve (004) comprises a steel ball (013) and a spring (012). The locking sleeve (004) is mounted on the adjusting cylinder (010). The adjusting cylinder (010) has six holes at one end close to the piston rod (001). The steel balls (013) are respectively placed in the six holes. The locking sleeve (004) blocks the six steel balls (013) in the six holes. The spring (012) pushes the locking sleeve (004) to lock the steel balls (013). The adjusting device (009) comprises an adjusting piston ( 031), a pull tube (033), an adjusting cylinder (010), a bushing (005) and a pressure cover (008), the adjusting cylinder (010) is sleeved on the cylinder body (003), the adjusting piston is placed inside the cylinder body (003), the pull tube (033) connects the adjusting piston (031), the pressure cover (008) and the adjusting cylinder (010) into a whole and fastens them with a nut (006) and a gasket (007), the pressure cover (008) presses the bushing (005), and the bushing (005) compresses the spring (012).

2. A quick-adjustable cylinder according to claim 1, characterized in that: The regulating cylinder (010) slides axially along the cylinder body (003), and the regulating piston (031) moves synchronously with the regulating cylinder (010). When the regulating piston (031) approaches the end cover (002), the cylinder stroke decreases, and when the regulating piston (031) moves away from the end cover (002), the cylinder stroke increases.

3. A quick-adjustable cylinder according to claim 1, characterized in that: A locking sleeve (004) is mounted on one end of the adjusting cylinder (010) close to the end cover (002). In a natural state, the locking sleeve (004) is pushed by the pressure of the spring (012), and the steel ball (013) is pressed into a groove on the outer circle of the cylinder body (003). In this state, the adjusting cylinder (010) is locked and cannot slide. The locking sleeve (004) is moved toward the pressure cover (008), and the adjusting cylinder (010) slides axially along the cylinder body (003). When the adjusting cylinder slides to a position that needs to be adjusted, the locking sleeve (004) is released, and the adjusting cylinder (010) is locked again.

4. A quick-adjustable cylinder according to claim 1, characterized in that: The outer edge of the cylinder body (003) is provided with N grooves (011) with circular arc cross sections. The grooves (011) with circular arc cross sections are used in conjunction with the steel balls (013). The grooves (011) and the steel balls (013) have the same curvature, and the distances between adjacent grooves (011) with circular arc cross sections are equal.

5. A quick-adjustable cylinder according to claim 1, characterized in that: The regulating piston (031) comprises a second guide ring (029), a second screw (027) and a retaining ring (028). The regulating piston (031) is fixed to one end of the pull tube (033) by means of the retaining ring (028) and is sealed by means of an O-ring (032). The second screw (027) fastens the retaining ring (028) to the regulating piston (031). The regulating piston (031) has a circular groove on the side facing the end cover (002). The piston body (024) comprises a third sealing ring (016), a first sealing ring (014), a second sealing ring (015), and a protruding circular ring on the side facing the regulating piston (031). The piston body (024) has a circular groove on the other side. The end cover (002) comprises a dust ring (020), a first guide ring (021) and a first screw (019). The end cover (002) has a protruding circular ring on the side facing the cylinder body (003).

6. A quick-adjustable cylinder according to claim 1, characterized in that: The piston body (024) moves toward the end cover (002). When the piston body (024) is about to come into contact with the end cover (002), the circular groove of the piston body (024) and the raised circular ring of the end cover (002) form a sealed cavity under the sealing action of the A seal (017) and the B seal (018), and the piston body (024) is buffered.

Images