TWO-STAGE SPEED CONTROLLER

Abstract

A two-stage speed controller includes a main body including a first port and a second port in communication with each other, and a primary channel and a secondary channel for fluid to flow therethrough. The secondary channel allows flowing in a single direction to a pressure accumulation chamber. A sliding-axle seat is arranged in the second port. An end of a sliding axle assembly forms, together with the sliding-axle seat, a valve. The pressure accumulation chamber is connected with a primary throttle channel. The sliding axle assembly is formed, in a transverse direction, with a secondary throttle channel. During ingress and discharging of the fluid, all the channels and movement of the valve together allow for control of the pressure of the fluid according to a magnitude of a spring force of a regulation assembly in order to control a moving speed of a cylinder connected to the main body.

Claims

1. A two-stage speed controller, comprising: a main body, which is formed with a first port and a second port in communication with each other, and a primary channel and a secondary channel for flowing of a fluid, the primary channel allowing fluid to flow from the first port and the second port into the main body, the secondary channel allowing fluid to flow in a single direction to a pressure accumulation chamber, the second port receiving a sliding-axle seat arranged therein; a sliding axle assembly, which comprises: a main axle having an end penetrating in sequence through an elastic element and a sub-axle to fit to an internal wall of the main body, the main axle and the sub-axle defining therebetween a balance channel, the main axle having an opposite end to which a regulation assembly is mounted, the regulation assembly comprising a knob connecting member connecting a rotary regulation knob, one end of the sliding axle assembly forming, in combination with the sliding-axle seat, a valve, characterized in that the pressure accumulation chamber is connected with and in communication with a primary throttle channel, and the sub-axle is formed with a secondary throttle channel arranged in a transverse direction thereof, wherein when the fluid flows through the first port, with the valve being in a closed condition, the fluid is allowed to flow to outside of the valve by means of the primary channel, the balance channel, the secondary channel, the primary throttle channel, and the secondary throttle channel, and in combination with the second port, driving the sliding axle assembly to start to move upwards to open the valve, and when the fluid is kept continuously circulating and flowing through the valve in combination with the secondary throttle channel, the sliding axle assembly is kept upward opening the valve to allow a cylinder connected to the main body to advance in two stages of speeds of initial acceleration and high speed; when the valve carries out fast discharging from an open condition, the fluid flows, through a combination of all the channels, to the first port to allow the sliding axle assembly to gradually move downward to close the valve, together with the primary throttle channel and the secondary throttle channel, to allow the valve to be adjusted to fully close, allowing for cushioning of impact of a back-and-forth operation of the cylinder.

2. The two-stage speed controller according to claim 1, wherein when the regulation assembly is in a fast discharging state for the main body, the rotary regulation knob in combination with the knob connecting member allows a spring force of the elastic element to adjust positional constraint to the sliding axle assembly for closing the valve so as to allow for adjusting of an internal cushioning position of the cylinder connected to the main body.

3. The two-stage speed controller according to claim 1, wherein the primary throttle channel further comprises: a throttle cylinder, which is arranged in an interior of the primary throttle channel, and a cross-sectional area of the primary throttle channel minus a cross-sectional area of the cylindrical throttle pin is between 1% to 7% of an area of the primary throttle channel, so that different cross-sectional areas of the throttle cylinder influence the pressure drop of the pressure accumulation chamber for closing the valve to thereby influence a cushioning position of the cylinder.

4. The two-stage speed controller according to claim 1, wherein a ratio of an area of the valve relative to an area of the balance channel is between 1:1 to 1:4, primarily for preventing the sliding axle assembly from being pushed backward to cause opening of the valve.

5. The two-stage speed controller according to claim 1, wherein a cross-sectional area of the secondary throttle channel is between 0.2 to 0.4 millimeters, so that different cross-sectional areas are applicable to allow a channel discharging amount to induce a slow-speed motion for cylinder discharging.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG. 1 is a perspective view of the present invention.

[0013] FIG. 2 is an assembling diagram of the present invention.

[0014] FIG. 3 is a schematic view showing a standby state of a main body of the present invention.

[0015] FIG. 4 is a control circuit diagram of the present invention based on FIG. 3.

[0016] FIG. 5 is a schematic view showing an ingress and initial acceleration state of the main body of the present invention.

[0017] FIG. 6 is a control circuit diagram of the present invention based on FIG. 5.

[0018] FIG. 7 is a schematic view showing an ingress and high speed state of the main body of the present invention.

[0019] FIG. 8 is a control circuit diagram of the present invention based on FIG. 7.

[0020] FIG. 9 is a schematic view showing a discharging and high speed state of the main body of the present invention.

[0021] FIG. 10 is a control circuit diagram of the present invention based on FIG. 9.

[0022] FIG. 11 is a schematic view showing a discharging and slow speed state of the main body of the present invention.

[0023] FIG. 12 is a control circuit diagram of the present invention based on FIG. 11.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Commonly according to a best feasible embodiment of the present invention, with reference to FIGS. 1-4, a detailed description is made below for better understanding of the present invention. The present invention relates to a two-stage speed controller, which comprises: a main body (10), which is formed with a first port (15) and a second port (16) in communication with each other to allow fluid (A) to flow to a primary channel (11) and a secondary channel (40), wherein the secondary channel (41) allows only flowing in a single direction to a pressure accumulation chamber (13), and the primary channel (11) allows flowing from the first port (15) and the second port (16) into the main body (10), and the second port (16) receives a sliding-axle seat (14) to fit therein; and [0025] a sliding axle assembly (20), which comprises: a main axle (21) having an end penetrating sequentially through an elastic element (22) and a sub-axle (23) to subsequently fit into an internal wall of the main body (10), wherein the main axle (21) and the sub-axle (23) define a balance channel (24) therebetween, and the main axle (21) has an opposite end on which a regulation assembly (30) is mounted, wherein the regulation assembly (30) comprises a knob connecting member (31) connecting a rotary regulation knob (32), and one end of the sliding axle assembly (20) forms, in combination with the sliding-axle seat (14), a valve (50).

[0026] Referring to FIGS. 5-8, the pressure accumulation chamber (13) is connected with and in communication with a primary throttle channel (12), and the sub-axle (23) is formed with a secondary throttle channel (231) arranged in a transverse direction thereof. When the fluid (A) flows through the first port (15), with the valve (50) being in a closed condition, the fluid (A) is allowed to flow to outside by means of the primary channel (40), the balance channel (24), the secondary channel (41), the primary throttle channel (12), and the secondary throttle channel (231), and in combination with the second port (16), and the pressure of the fluid (A) inside the pressure accumulation chamber (13) drives the sliding axle assembly (20) to move upwards to open the valve (50), and when the fluid (A) continuously passes through the valve (50) in combination with the secondary throttle channel (231) for circulating flow, the sliding axle assembly (20) is continuously kept upward to open the valve (50), allowing a cylinder connected to the main body (10) to be driven to advance at two stages of initial accelerating and a high speed.

[0027] Referring to FIGS. 9-12, when the valve (50) carries out fast discharging from an ingress condition, the fluid (A) flows through all the previously-mentioned channels to the first port (15) to allow the pressure of the fluid (A) inside the pressure accumulation chamber (13) to drop down and the sliding axle assembly (20) gradually moves downward to close the valve (50), further in combination with the primary throttle channel (12) and the secondary throttle channel (231), to allow the valve (50) to adjust to fully close and cushioning the impact of the back-and-forth motion of the cylinder. A ratio of an area of the valve (50) with respect to an area of the balance channel (24) is between 1:1 and 1:4, primarily for preventing the sliding axle assembly (20) from being pushed backward to cause opening of the valve (50).

[0028] When the regulation assembly (30) is in a fast discharging state for the main body (10), the rotary regulation knob (32) in combination with the knob connecting member (31) allows the spring force of the elastic element (22) to adjust positional constraint to the sliding axle assembly (20) for closing the valve (50) so as to allow for adjusting of an internal cushioning position of the cylinder connected to the main body (10).

[0029] The primary throttle channel (12) is provided, in an interior thereof, with a throttle cylinder (121), and a cross-sectional area of the primary throttle channel (12) minus a cross-sectional area of the throttle cylinder (121) is between 1% to 7% of an area of the primary throttle channel (12). By setting different cross-sectional areas of the cylindrical throttle pin (231), the pressure lowering of the pressure accumulation chamber (13) can be affected and allowing the sliding axle assembly (20) to close the valve (50) to thereby affect the cushioning position of the cylinder.

[0030] The secondary throttle channel (231) has a diameter between 0.2 to 0.4 millimeters. Different diameters can be applied to allow the channel discharging amount to induce a slow-speed motion for cylinder discharging.

[0031] In summary, the two-stage speed controller according to the present invention uses the spring force of the elastic element (22) of the sliding axle assembly (20) to handle the pneumatic pressure of the fluid (A), which is achieved, specifically, through an intuitive operation manner by means of the rotary regulation knob (32) to allow the rotary regulation knob (32) to carry out elastic adjustment to therefore control the pressure of the fluid (A) inside the pressure accumulation chamber (13), providing a cylinder connected to the main body (10) with a cushioning effect of two-staged speeds during the operation thereof and to use the arrangement of the primary throttle channel (12) and the secondary throttle channel (231) to influence the pressure drop of the pressure accumulation chamber (13) for further adjustment for carrying out related adjustment of cushioning position and cushioning speed of the cylinder connected to the main body (10) to provide a better effect for cushioning the impact acting on the cylinder.