TWM521127U - Structure of piston - Google Patents

Description

Piston construction

The present invention relates to a piston construction, and more particularly to an improved piston construction.

The height of the bicycle seat cushion, on the one hand, in addition to one of the elements of whether the rider can reduce sports injuries, on the other hand, riding the bicycle in the correct posture can achieve the best and most labor-saving efficiency of the pedaling action; The different height requirements of individuals and the consideration of economic benefits in manufacturing, the height of the adjustable bicycle seat cushion has become the focus of research and design in the industry in recent years.

At present, the height of the adjustable seat cushion is mainly provided by a height adjusting device between the seat tube and the seat tube riser, and the relative position of the two is changed by linear displacement to achieve the height adjustment function. Such height adjustment devices can be classified into "mechanical", "gas-oil-pressure", and "hybrid" depending on the power application of the actuator. The "gas-oil type" is the use of air pressure. The member or hydraulic member, or both, are actuated to adjust the relative height position between the seat tube and the seat riser.

Conventional hydraulic components have a piston configuration that utilizes an oil body to flow between the two oil chambers to cause linear up and down displacement to actuate the seat cushion to move up and down. However, in the conventional piston structure, in addition to the piston seat, a fixing seat is disposed in the piston seat and used to fix the upper and lower O-rings, but the fixing seat is also limited to the flow space of the oil body. Therefore, the up and down movement speed of the piston rod cannot be increased, thereby limiting the performance of applying the movement of a piston mechanism and the seat cushion up and down.

Therefore, how to provide an improved piston structure can expand the flow space of the oil body, thereby improving the performance of the application in a piston mechanism.

In view of the above problems, it is an object of the present invention to provide a piston structure that can expand the flow space of the oil body and thereby improve the performance of the piston structure.

To achieve the above object, a piston structure of the present invention includes a two-O-ring, a piston seat, a piston rod, an abutment ring, a piston pin, a gasket, and an actuating rod. These O-rings are relatively set. The piston seat has a second stop and at least one hole, the hole being located between the stops, an oil system flowing through the hole. One of the O-rings is disposed in one of the stops. The piston rod is abutted against the other O-ring in the other stop portion, and the O-ring is disposed on the other stop portion by the abutting ring. The piston pin passes through the O-rings, the stop portions and the piston rod. The gasket is disposed between one of the heads of the piston pin and the O-ring. The actuating rod is threaded through the piston rod and contacts the piston pin.

In one embodiment, the piston pin has an annular bevel through which an oil system flows from one oil chamber to the other through the annular ramp.

In one embodiment, the angle of the projection of one of the annular bevels is between 30 and 60 degrees.

In one embodiment, one of the annular bevels has a height between 2 mm and 5 mm.

In one embodiment, in a first state, the head contacts the shim, and in a second state, the head is disengaged from the shim.

As described above, in the piston structure of the present invention, the two stoppers are directly provided in the piston seat for blocking the O-rings, so that the conventional holder can be omitted. Thereby, the oil body in the piston structure of the present invention can be greatly increased in the flow space, thereby improving the vertical movement speed of the piston rod, thereby improving the performance of the piston structure. The piston construction of the present invention can be applied to any suitable field, such as a bicycle seat cushion lifting mechanism, but the present invention is not limited thereto.

In addition, the piston pin of the present piston configuration has an annular bevel through which an oil system flows from one oil chamber to the other through an annular ramp. By the arrangement of the annular bevel, the amount of oil body flow can be controlled in a small degree, thereby achieving the purpose of fine-tuning, for example, the height of the seat cushion, and thus improving the performance of the piston structure.

1‧‧‧Piston construction
11, 12‧‧‧O-ring
13‧‧‧ piston seat
131, 132‧‧ ‧ stop
133‧‧‧ holes
14‧‧‧ piston rod
15‧‧‧Abutment ring
16‧‧‧Piston pin
161‧‧‧ head
162‧‧‧ring bevel
17‧‧‧shims
18‧‧‧Action rod
2‧‧‧Piston mechanism
21‧‧‧Cylinder
22, 23‧‧‧ oil room
24‧‧‧ air chamber
A‧‧‧ angle
H‧‧‧ Height

1 is an exploded perspective of a piston configuration of a preferred embodiment of the present invention.
2 is a schematic view showing a combination of a piston structure according to a preferred embodiment of the present invention.
3 is a schematic cross-sectional view showing a piston structure of a preferred embodiment of the present invention.
4 is a schematic view of a piston structure applied to a piston mechanism in accordance with a preferred embodiment of the present invention.
Figure 5 is a schematic cross-sectional view of the piston mechanism shown in Figure 4.
Figure 6 is an enlarged schematic view of one of the piston mechanisms shown in Figure 5.
7 and FIG. 8 are schematic views showing two states in which the actuating lever of the piston mechanism is actuated to cause the piston pin to move upward according to the preferred embodiment of the present invention.
Figure 9 is a schematic view of one of the piston pins of the preferred embodiment of the present invention.

To facilitate the description of the above novel aspects of the present invention, it is expressed by way of specific examples. The description of the upper, lower, left and right directions of the embodiment is defined in accordance with the direction of our view, and is not intended to limit the creation.

1 is a schematic exploded view of a piston structure 1 of a preferred embodiment of the present invention, FIG. 2 is a schematic view showing a combination of a piston structure 1 according to a preferred embodiment of the present invention, and FIG. 3 is a piston of a preferred embodiment of the present invention. A schematic cross-sectional view of one of the structures 1.

As shown in FIG. 1 to FIG. 3 , a piston structure 1 of the preferred embodiment of the present invention includes a two-shaped ring 11 , 12 , a piston seat 13 , a piston rod 14 , an abutment ring 15 , and a piston pin 16 . A spacer 17 and an actuating lever 18 (please refer to FIG. 5 and FIG. 6).

The O-rings 11, 12 are arranged opposite each other.

The piston seat 13 has two stoppers 131 and 132, and one of the O-rings 11 is disposed on the stopper 131. The piston rod 14 is abutted against the other O-ring 12 at the other stopping portion 132, and the O-ring 12 is disposed on the other stopping portion 132 by the abutting ring 15, that is, the abutting ring The 15 series is disposed between the O-ring 12 and the stopper 132.

The piston pin 16 passes through the O-rings 11, 12, the stoppers 131, 132 and the piston rod 14. The spacer 17 is disposed between the head 161 of one of the piston pins 16 and the O-ring 11. The actuating lever 18 is threaded through the piston rod 14 and contacts the piston pin 16 (please refer to FIGS. 5 and 6).

4 is a schematic view showing a piston structure 1 applied to a piston mechanism 2 according to a preferred embodiment of the present invention, FIG. 5 is a schematic cross-sectional view of the piston mechanism 2 shown in FIG. 4, and FIG. 6 is a piston mechanism 21 shown in FIG. An enlarged schematic. As shown in FIGS. 4 to 6, the piston mechanism 2 of the present embodiment includes a piston structure 1 and a cylinder block 21, and the cylinder block 21 and the piston structure 1 form two oil chambers 22, 23 and a gas chamber 24. The two oil chambers 22, 23 are in communication with each other, and the gas chamber 24 is independent of the two oil chambers 22, 23 and provides the force for the piston rod 14 to extend. The piston seat 13 has at least one hole 133 between the stop portions 131, 132. An oil system can flow through the hole 133 to flow from the oil chamber 22 to the oil chamber 23 or from the oil chamber 23 to the oil chamber 22, This in turn causes the piston rod 14 to move up and down.

7 and FIG. 8 are schematic views showing two states in which the actuating lever 18 of the piston mechanism 2 is actuated to cause the piston pin 16 to move upward according to the preferred embodiment of the present invention, wherein the piston pin 16 of FIG. 8 is compared with FIG. The piston pin 16 moves more upwards. Originally in a first state, the head 161 of the piston pin 16 contacts the spacer 17 (see Figure 3). In a second state, the head 161 of the piston pin 16 is disengaged from the spacer 17 (Fig. 7 with Figure 8 belongs to the second state). For example, in the application of a bicycle seat cushion (not shown), in the first state, the oil chambers 22, 23 of the cylinder block 21 are in a stable state, and the seat cushion is positioned at a certain height, and needs to be adjusted. When the seat cushion is at another height, the user can actuate an actuator (not shown) such that the actuating lever 18 is actuated and the push-up piston pin 16 moves upward. During the movement, the oil chamber of the cylinder 21 22, 23 presents a flow state, and causes the piston rod 14 to move upwards and drives the seat cushion to descend to achieve the purpose of adjusting the height of the seat cushion. When the user no longer actuates the actuator, the oil chambers 22, 23 of the cylinder block 21 again assume a steady state, thereby allowing the seat cushion to be fixed at a suitable height.

Figure 9 is a schematic view of one of the piston pins 16 of the preferred embodiment of the present invention. As shown in Fig. 9, the piston pin 16 further has an annular bevel 162 through which an oil body can flow from one oil chamber to the other through the annular ramp 162 (please refer to Figs. 7 and 8). In the present embodiment, the angle A of the projection of one of the annular slopes 162 is, for example, between 30 and 60 degrees. Further, in the present embodiment, the height H of one of the annular slopes 162 is, for example, between 2 mm and 5 mm. Of course, the above angle A and height H can be adjusted according to actual needs. As shown in FIG. 7 and FIG. 8, when the piston pin 16 is at different heights, the annular bevel 162 of the piston pin 16 is designed to produce different changes in the oil passage, that is, the piston pin 16 and the O-ring 11 The gap between the two changes, which also allows the speed of movement of the piston rod 14 to be adjusted, thereby improving the usability of the piston mechanism 2.

In summary, in the piston structure of the present invention, two stop portions are directly provided in the piston seat for blocking the O-rings, so that the conventional mount can be omitted. Thereby, the oil body in the piston structure of the present invention can be greatly increased in the flow space, thereby increasing the vertical movement speed of the piston rod, thereby improving the performance of the piston structure applied to a piston mechanism. The piston construction of the present invention can be applied to any suitable field, such as a bicycle seat cushion lifting mechanism, but the present invention is not limited thereto.

In addition, the piston pin of the present piston configuration has an annular bevel through which an oil system flows from one oil chamber to the other through an annular ramp. By the arrangement of the annular bevel, the amount of oil body flow can be controlled in a small degree, thereby achieving the purpose of fine-tuning, for example, the height of the seat cushion, and thus improving the performance applied to a piston mechanism.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims.

1‧‧‧Piston construction

11, 12‧‧‧O-ring

13‧‧‧ piston seat

131, 132‧‧ ‧ stop

14‧‧‧ piston rod

15‧‧‧Abutment ring

16‧‧‧Piston pin

161‧‧‧ head

17‧‧‧shims

Claims (6)

A piston construction comprising:
Two O-rings are relatively set;
a piston seat having a second stop for at least one hole through which an oil body flows, one of the O-rings being disposed in one of the stops;
a piston rod that is attached to the other O-ring to the other end;
Abutting against the ring, and the O-ring is disposed on the other stop portion by the abutting ring;
a piston pin through which the O-rings, the stop portions and the piston rod are inserted;
a gasket is disposed between a head of the piston pin and the O-ring; and an actuating rod is threaded through the piston rod and contacts the piston pin. The piston construction of claim 1, wherein the piston pin has an annular bevel through which an oil system flows from one oil chamber to the other. The piston structure of claim 2, wherein the angle of the projection of the one of the annular bevels is between 30 degrees and 60 degrees. The piston construction of claim 2, wherein one of the annular bevels has a height between 2 mm and 5 mm. The piston structure of claim 1, wherein in a first state, the head contacts the spacer, and in a second state, the head is disengaged from the spacer. The piston construction of claim 1, wherein the hole is located between the stops.