Multi-layer air cylinder straight stroke executing mechanism

Abstract

The utility model relates to the technical field of multi-level air cylinders, in particular to a multi-level air cylinder straight stroke executing mechanism which comprises an output shaft arranged at the output end of a multi-level air cylinder, a piston ring arranged on the outer side of the output shaft, a mounting mechanism and an unlocking and releasing mechanism. The mounting mechanism is arranged on the outer side of the output shaft and used for mounting the piston ring to the outer side of the output shaft; the unlocking and releasing mechanism is arranged on the outer side of the output shaft and used for locking the mounting mechanism and releasing the mounting mechanism. According to the technical scheme, through the installation mechanism and the unlocking releasing mechanism, the piston ring can be rapidly installed outside the output shaft of the multi-layer air cylinder, a threaded structure does not need to be machined on the output shaft, and therefore the additional machining step of the output shaft caused by the threaded connection requirement is avoided, and the service life of the output shaft is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of multi-level cylinder technology, specifically to a multi-level cylinder linear stroke actuator. Background Technology

[0002] In the field of modern industrial automation control, linear actuators, as key devices that convert pneumatic signals into linear displacement outputs, are widely used in various scenarios such as valve actuation, robotic arm control, and automated production lines. Among them, multi-level cylinder linear actuators, with their advantages of compact structure, large output force, and high control precision, have become the ideal choice for high-precision, high-load applications. These actuators are typically composed of multiple cylinders connected in series. By controlling the intake and exhaust sequence of each cylinder, precise linear motion of the output shaft is achieved, thereby driving the load to complete specific actions.

[0003] However, in existing technologies, multi-stage cylinder linear actuators face significant technical bottlenecks in piston ring installation. Traditionally, to mount piston rings onto the output shaft, the output shaft is often designed as a split structure. Installing piston rings on this split output shaft requires disassembling the various parts of the output shaft, placing the piston rings in their designated positions, and then reassembling the output shaft. This process is not only complex and time-consuming, but the disassembly and reassembly can also easily damage the precision and mating surfaces of the output shaft, thus affecting the overall performance of the actuator.

[0004] Furthermore, the split-type output shaft design increases the manufacturing cost and maintenance difficulty of the actuator. Because the output shaft needs frequent disassembly and reassembly, its connecting parts are prone to wear and loosening, leading to a decrease in the output shaft's accuracy and potentially causing malfunctions. At the same time, the high precision requirements for machining and assembly of the split-type output shaft further increase manufacturing costs. Utility Model Content

[0005] To address the aforementioned issues, a multi-level cylinder linear stroke actuator is provided. Through an installation mechanism and an unlocking and release mechanism, the additional machining steps for the output shaft caused by the threaded connection requirement are resolved.

[0006] To address the problems of existing technologies, this utility model provides a multi-stage cylinder linear stroke actuator, including an output shaft disposed at the output end of the multi-stage cylinder and piston rings disposed on the outside of the output shaft. The cylinder linear stroke actuator also includes an installation mechanism and an unlocking and releasing mechanism; the installation mechanism is disposed on the outside of the output shaft and is used to install the piston rings to the outside of the output shaft; the unlocking and releasing mechanism is disposed on the outside of the output shaft and is used to lock and release the installation mechanism.

[0007] Preferably, the mounting mechanism includes an abutment portion; an abutment groove is provided on the outside of the output shaft to abut the abutment portion; a displacement groove is provided on the top of the piston ring to limit the sliding of the abutment portion; the abutment portion is slidably disposed on the top of the piston ring and has a pair, and the abutment portion can move relatively close to or away from the top of the piston ring.

[0008] Preferably, the top surface of the abutting part is triangular, and the contact surface between the abutting part and the abutting groove is a cuboid structure.

[0009] Preferably, the unlocking and release mechanism includes a mounting sleeve and a drive unit; the mounting sleeve is slidably disposed on the outside of the output shaft and is located above the piston ring; the drive unit is disposed at the bottom of the mounting sleeve, and when the mounting sleeve abuts against the top of the piston ring, the drive unit can drive a pair of abutting parts to move in a relatively close state.

[0010] Preferably, the unlocking and releasing mechanism further includes an adsorption part; the adsorption part has a pair and is respectively disposed inside the displacement groove. In the initial state, the abutment part and the adsorption part are in an adsorption state. When the driving part contacts the abutment part, the adsorption part and the abutment part are separated.

[0011] Preferably, the driving part has a triangular shape and the end face edge of the driving part has a chamfered shape.

[0012] Preferably, the unlocking and release mechanism further includes a locking part; the locking part has multiple locking parts and is respectively disposed on the top of the mounting sleeve, and the locking part can screw the mounting sleeve against the top of the piston ring by means of thread.

[0013] Preferably, the piston ring has an annular groove at its top for the insertion of the mounting sleeve, which can abut against the annular groove when the mounting sleeve slides.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. By setting up an installation mechanism and an unlocking and release mechanism, this utility model can quickly install piston rings on the outside of the output shaft of a multi-layer cylinder without machining a threaded structure on the output shaft, thereby avoiding the extra machining steps on the output shaft caused by the threaded connection requirement and effectively improving the service life of the output shaft.

[0016] 2. By setting an unlocking and releasing mechanism, when the driving part drives the abutting part to complete the engagement and installation with the abutting groove, the user can then rotate multiple locking parts to the top of the mounting sleeve. At this time, the locking parts can fix the mounting sleeve to the top of the piston ring and lock the abutting part. Attached Figure Description

[0017] Figure 1This is a first-view perspective three-dimensional structural diagram of a multi-layer cylinder linear stroke actuator according to this utility model.

[0018] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of a multi-layer cylinder linear stroke actuator according to this utility model.

[0019] Figure 3 yes Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Figure 4 This is a three-dimensional structural diagram of the unlocking and release mechanism of a multi-layer cylinder linear stroke actuator according to this utility model.

[0021] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the mounting sleeve of a multi-layer cylinder linear stroke actuator of this utility model, showing the disassembly and contact parts in a state where they are relatively far apart.

[0022] Figure 6 yes Figure 5 Enlarged structural diagram at point B in the middle.

[0023] Figure 7 This is a partial cross-sectional three-dimensional structural diagram of the mounting sleeve and drive unit of a multi-layer cylinder linear stroke actuator according to this utility model.

[0024] The following are the labels in the diagram: 1. Multistage cylinder; 2. Output shaft; 21. Abutment groove; 3. Piston ring; 31. Circular mating groove; 4. Mounting mechanism; 41. Abutment part; 5. Unlocking and releasing mechanism; 51. Mounting sleeve; 52. Drive part; 53. Adsorption part; 54. Locking part. Detailed Implementation

[0025] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0026] See Figures 1-3 As shown, a multi-stage cylinder linear stroke actuator includes an output shaft 2 disposed at the output end of a multi-stage cylinder 1 and a piston ring 3 disposed on the outside of the output shaft 2. The cylinder linear stroke actuator also includes an installation mechanism 4 and an unlocking and releasing mechanism 5. The installation mechanism 4 is disposed on the outside of the output shaft 2 and is used to install the piston ring 3 to the outside of the output shaft 2. The unlocking and releasing mechanism 5 is disposed on the outside of the output shaft 2 and is used to lock the installation mechanism 4 and release the installation mechanism 4.

[0027] By setting the installation mechanism 4 and the unlocking and release mechanism 5, the piston ring 3 can be quickly installed on the outside of the output shaft 2 of the multi-layer cylinder without machining a threaded structure on the output shaft 2. This avoids the extra machining steps on the output shaft 2 caused by the threaded connection requirement, effectively improving the service life of the output shaft 2 and facilitating subsequent disassembly.

[0028] See Figure 3 As shown, the mounting mechanism 4 includes an abutment portion 41; the output shaft 2 has an abutment groove 21 on its outer side that abuts against the abutment portion 41; the piston ring 3 has a displacement groove on its top for limiting the sliding of the abutment portion 41; the abutment portion 41 is slidably disposed on the top of the piston ring 3 and has a pair, and the abutment portion 41 can move relatively close to or away from the top of the piston ring 3.

[0029] When it is necessary to quickly install the piston ring 3 onto the outside of the output shaft 2, first place the piston ring 3 in the middle of the output shaft 2, and then move the piston ring 3 downward until the abutting part 41 is close to the abutting groove 21 opened on the outside of the output shaft 2. At this time, the abutting part 41 can move relatively close along the displacement groove opened on the top of the piston ring 3 until the pair of abutting parts 41 move into the inside of the abutting groove 21, thereby achieving quick engagement and fixation of the piston ring 3.

[0030] See Figure 3 As shown, the top surface of the abutting part 41 is triangular, and the contact surface between the abutting part 41 and the abutting groove 21 is a cuboid structure.

[0031] The top surface of the abutment portion 41 is preferably triangular to reduce friction with the contacting object. When the abutment portion 41 abuts against the abutment groove 21, the cuboid structure of the abutment portion 41 can move completely into the interior of the abutment groove 21.

[0032] See Figures 4-7 As shown, the unlocking and releasing mechanism 5 includes a mounting sleeve 51 and a driving part 52; the mounting sleeve 51 is slidably disposed on the outside of the output shaft 2 and is located above the piston ring 3; the driving part 52 is disposed at the bottom of the mounting sleeve 51, and when the mounting sleeve 51 abuts against the top of the piston ring 3, the driving part 52 can drive a pair of abutting parts 41 to move in a relatively close state.

[0033] To lock the abutment part 41 into contact with the abutment groove 21, initially, the abutment part 41 is in a moving state away from the output shaft 2. When the mounting sleeve 51 descends and is positioned above the piston ring 3, the drive part 52 located at the bottom of the mounting sleeve 51 contacts the abutment part 41 and drives the abutment part 41 to move along the displacement groove closer to the output shaft 2 until the bottom of the mounting sleeve 51 is in complete contact with the top of the piston ring 3. In this state, the abutment part 41 can be driven by the drive part 52 and completes the engagement connection with the abutment groove 21. This achieves the driving of the abutment part 41.

[0034] See Figure 6 As shown, the unlocking and releasing mechanism 5 also includes an adsorption part 53; the adsorption part 53 has a pair and is respectively disposed inside the displacement groove. In the initial state, the abutment part 41 and the adsorption part 53 are in an adsorption state. When the driving part 52 contacts the abutment part 41, the adsorption part 53 and the abutment part 41 are separated.

[0035] In the initial state, the contact part 41 and the adsorption part 53 are locked. The adsorption part 53 is preferably made of magnetic material, which can be attracted to the contact part 41 and pulled back to the initial position. When the driving part 52 comes into contact with the contact part 41, the driving part 52 can drive the contact part 41 to move and cause the adsorption part 53 to lose its locked state.

[0036] See Figure 7 As shown, the drive unit 52 has a triangular shape and the end face edge of the drive unit 52 has a chamfered shape.

[0037] Since the driving part 52 has a triangular shape, when the driving part 52 comes into contact with the abutment part 41, the edge of the end face of the driving part 52 can reduce the contact friction between the driving part 52 and the abutment part 41, and the abutment part 41 can be driven to move stably through the triangular structure.

[0038] See Figure 6 As shown, the unlocking and release mechanism 5 also includes a locking part 54; the locking part 54 has multiple parts and is respectively disposed on the top of the mounting sleeve 51, and the locking part 54 can screw the mounting sleeve 51 against the top of the piston ring 3 by means of threaded insertion.

[0039] When the drive unit 52 drives the abutment part 41 to complete the engagement with the abutment groove 21, the user then rotates the multiple locking parts 54 to the top of the mounting sleeve 51. At this time, the locking parts 54 can fix the mounting sleeve 51 on the top of the piston ring 3 and lock the abutment part 41. When it is necessary to remove the piston ring 3, the user first rotates the multiple locking parts 54 out of the outside of the mounting sleeve 51, and then pulls the mounting sleeve 51 upward towards the output shaft 2. At this time, the drive unit 52 loses the abutment lock on the abutment part 41, and then the suction part 53 can suction the abutment part 41 to the initial position, realizing the quick installation and removal of the piston ring 3.

[0040] See Figure 5 As shown, the piston ring 3 has an annular mating groove 31 on its top for the installation sleeve 51 to be inserted into. When the installation sleeve 51 slides, it can abut against the annular mating groove 31.

[0041] To improve the tightness of the mating between the mounting sleeve 51 and the piston ring 3, an annular mating groove 31 is provided on the top of the piston ring 3 to abut against the bottom of the mounting sleeve 51. When the mounting sleeve 51 and the top of the piston ring 3 are in a fitted state, the bottom of the mounting sleeve 51 can abut against the annular mating groove 31 on the top of the piston ring 3.

[0042] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A multi-stage cylinder direct stroke actuator comprising an output shaft (2) provided at the output end of a multi-stage cylinder (1) and a piston ring (3) provided outside the output shaft (2), characterized in that, The gas cylinder straight stroke actuator further comprises a mounting mechanism (4) and an unlocking release mechanism (5); The mounting mechanism (4) is arranged outside the output shaft (2), and is used for mounting the piston ring (3) to the outside of the output shaft (2); The unlocking release mechanism (5) is arranged outside the output shaft (2), and is used for locking and releasing the mounting mechanism (4).

2. A multi-stage pneumatic cylinder direct stroke actuator according to claim 1, wherein The mounting mechanism (4) comprises an abutting part (41); the outside of the output shaft (2) is provided with an abutting groove (21) abutting with the abutting part (41); the top of the piston ring (3) is provided with a displacement groove for limiting sliding of the abutting part (41); the abutting part (41) is slidably arranged on the top of the piston ring (3) and has a pair, and the abutting part (41) can move in a relatively close or far state along the top of the piston ring (3).

3. The multi-stage pneumatic cylinder direct drive actuator of claim 1, wherein, The top surface of the abutting part (41) is triangular, and the contact surface of the abutting part (41) and the abutting groove (21) is a cuboid structure.

4. The multi-stage pneumatic cylinder direct drive actuator of claim 1, wherein, The unlocking release mechanism (5) comprises a mounting sleeve (51) and a driving part (52); the mounting sleeve (51) is slidably arranged outside the output shaft (2), and the mounting sleeve (51) is located above the piston ring (3); the driving part (52) is arranged at the bottom of the mounting sleeve (51), and when the mounting sleeve (51) abuts against the top of the piston ring (3), the driving part (52) can drive the pair of abutting parts (41) to move in a relatively close state.

5. A multi-stage pneumatic cylinder direct stroke actuator according to claim 4, wherein, The unlocking release mechanism (5) further comprises an adsorption part (53); the adsorption part (53) has a pair and is respectively arranged inside the displacement groove, and in an initial state, the abutting part (41) is in an adsorption state with the adsorption part (53); when the driving part (52) contacts the abutting part (41), the adsorption part (53) is in a separated state with the abutting part (41).

6. A multi-stage pneumatic cylinder direct stroke actuator according to claim 4, wherein, The driving part (52) is triangular in shape, and the end surface edge of the driving part (52) is chamfered.

7. A multi-stage pneumatic cylinder direct stroke actuator according to any one of claims 4-6, characterized in that, The unlocking release mechanism (5) further comprises a locking part (54); the locking part (54) has a plurality of and is respectively arranged on the top of the mounting sleeve (51), and the locking part (54) can abut against the top of the piston ring (3) by screwing.

8. The multi-stage pneumatic cylinder direct drive actuator of claim 1, wherein, The top of the piston ring (3) is provided with a circular ring-shaped matching groove (31) for inserting the mounting sleeve (51), and when the mounting sleeve (51) slides, the mounting sleeve (51) can abut against the circular ring-shaped matching groove (31).

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