TWM565159U - Elevating device - Google Patents

Abstract

An elevating device includes an outer tube, an inner tube, an elevating lever, an oil, a control valve and an oil-guiding tube. An inner oil room is formed in the inner tube. An outer oil room and an outer air room are formed between the inner tube and the outer tube. An oil route is formed between the inner oil room and the outer oil room. The control valve is connected with an end of the elevating lever, and can be controlled to open or close the oil route, thereby moving or positioning the elevating lever. When the oil route is opened, the elevating lever can be moved to push a residual air above the inner tube to flow back to the outer air room through the oil-guiding tube. Thereby, imprecision and failure while adjusting the elevating lever can be prevented.

Description

Lifting device

The present invention relates to a lifting device. More specifically, the present invention relates to a lifting device that simultaneously mixes a gas and an oil body in a space to generate a pressure balance, so that the mutually nested tubes can be displaced and positioned relative to each other.

Many of the current activities require the user to maintain a certain sitting position. For example, riding a locomotive, bicycle, driving a car, office work, meetings, dining, or even fitness, medical treatment, and many other activities require the user to sit in a sitting position. In order to carry the weight of the user, the user does not need to use force to maintain the sitting posture. In the above activities, the seat cushion or the seat is arranged to allow the user to sit thereon. As a result, many seat cushions or seats have improved ergonomic structure to increase the comfort and correctness of the user's sitting posture. In some more intense sports situations, such as bicycle races, the user must maintain a certain sitting position for a long time, and because of the correct posture, the comfort and correctness of sitting posture are particularly required. Therefore, in addition to improving the geometry of the seat cushion itself, more importantly, the height of the seat cushion needs to be adjusted according to the different body shapes of the user, so that a lifting device capable of adjusting the height of the seat cushion has been developed.

Generally, the lifting device such as a bicycle seat cushion can be adjusted. According to different actuation modes, it can be roughly divided into mechanical actuation, hydraulic actuation, pneumatic actuation and oil and gas hybrid actuation. Mechanical actuation, hydraulic actuation and pneumatic actuation have been commonly used. However, many problems still need to be further improved. For example, the mechanical actuation method is limited by its mechanism, and its adjustment method has a paragraph and cannot achieve the smoothness of immediate and stepless adjustment. Pneumatic actuation results in poor response speed and accuracy, and its output power is small. Hydraulic actuation requires consideration of the problem of oil seals, resulting in increased structural complexity. Therefore, oil and gas hybrid actuation is developed. The oil-gas hybrid actuation is generally filled with oil bodies and gases in a set of tubes that are nested with each other. The tubular body group includes a plurality of tubes that are relatively linearly displaceable. It cooperates with the displacement stroke of the pipe body and the pressure balance of the oil pressure and the air pressure to achieve the function of positioning and adjusting the pipe body.

Although the above-mentioned oil-gas hybrid actuation attempts to combine the advantages of pure hydraulic actuation and pure pneumatic actuation, there are still several problems. For example, the conventional oil-gas hybrid actuation mode has a plurality of gas chambers and oil chambers at the same time, and the gas chambers and the oil chambers need to be isolated from each other to avoid mutual influence (for example, oil bodies and gases). Incorporate into each other). Therefore, each of the air pressure systems and each of the hydraulic systems has its own preset pressure and does not flow with each other. However, inevitably, even if the air chamber and the oil chamber are each isolated independently, the redundant gas may enter the oil chamber from the outside. At this time, since the oil body of the oil chamber has been mixed with the outside air, the preset pressure of the original oil body is affected, so that the operation is not smooth and inaccurate. Moreover, due to the separation of the air chambers, the redundant gas cannot be discharged for calibration, so after a long period of use, it is impossible to return to the initial state, resulting in the need to replace the entire set of lifting equipment. Set. In addition, the independent arrangement of the gas chamber and the oil chamber is mutually complicated, which will greatly increase the complexity of the mechanism, resulting in increased manufacturing and maintenance costs.

One of the objects of the present invention is to provide a lifting device that can adjust or position the lifting rod by creating a pressure balance through the mixing of gas and oil body. Moreover, the lifting device of the present invention also utilizes the displacement of the lifting rod and the control valve, and cooperates with the guiding oil pipe to perform the return flow of the redundant gas, thereby increasing the smoothness and accuracy of the displacement of the lifting rod, and achieving the stepless and instant Adjustment. Moreover, through the different configuration of the control valve, the use flexibility.

In one embodiment, a lifting device of the present invention comprises an outer tube, an inner tube, a lifting rod, an oil body, a control valve and a guiding oil pipe. The inner tube is sleeved in the outer tube. An inner tube oil chamber is formed in the inner tube, and an outer tube oil chamber and an outer tube air chamber are formed between the inner tube and the outer tube. The lifting rod is sleeved in the inner tube and is displaceable relative to the inner tube. The oil body is filled in the inner tube oil chamber and the outer tube oil chamber, and flows and communicates between the inner tube oil chamber and the outer tube oil chamber to form an oil body passage. The control valve is disposed at one end of the lifting rod and displaced with the lifting rod. The control valve is opened or closed to switch the oil passage to open or close, so that the linear position of the lifting rod relative to the inner tube changes, thereby moving or positioning the lifting rod. The guiding oil pipe is disposed between the inner pipe and the outer pipe. The guiding oil pipe connects the inner pipe oil chamber and the outer pipe oil chamber. After the oil passage is opened, the lifting rod is displaced to push a redundant gas formed above the inner tube oil chamber, so that the redundant gas is guided through the guiding oil pipe and flows back through the oil body passage to return to the outer tube air chamber. Redundant gas is formed in the inner tube chamber above one of the inner tube oil chambers.

In the above lifting device, the redundant gas is formed in the inner tube air chamber above one of the inner tube oil chambers. Further, the lifting device may include a gas nozzle that communicates with the outer tube oil chamber. A replenishing action or an inflating action can be performed through the nozzle.

The lifting device may include an extension rod. The lifting rod is sleeved in the extension rod and displaced relative to the extension rod. The extension rod is sleeved in the inner tube and displaced relative to the inner tube.

The lifting device further includes an actuating mechanism. The control valve is displaced by the actuation mechanism to control the oil passage. Further, the control valve includes a valve seat and a valve member. The valve seat is connected to the lifting rod and displaced by the lifting rod, and the valve member is assembled in the valve seat and displaced in the valve seat. A passage is opened on one side of the valve seat, and a first-class road is opened between the outer tube and the inner tube. A first groove is arranged on the valve member. When the actuating mechanism is depressed, the valve member is displaced by the actuating mechanism and an opening is formed in the valve seat. The oil body is guided by the outer tube oil chamber through the guiding oil pipe, flows through the flow channel and the passage, and flows into the inner tube oil chamber through the first groove to the opening, thereby opening the oil body passage. The actuating mechanism includes a trigger member and a push rod. The trigger member is disposed inside a pad support seat, and the push rod is sleeved on the lift rod and displaced relative to the lift rod. When the trigger member is pressed down and pushed against the push rod, the push rod is pressed downward to push against the valve member, so that the valve member is pressed and displaced downward, thereby forming an opening with respect to the valve seat. In addition, an elastic member can be provided in the valve seat. The elastic member accumulates an elastic restoring force when the valve member is pressed, and the elastic restoring force can return the valve member to a starting position to close the oil passage.

In the above lifting device, the outer tube air chamber is formed above the outer tube oil chamber, and the outer tube oil chamber and the outer tube air chamber are closed and coexisted between the inner tube and the outer tube, so that the oil body and the outer tube gas in the outer tube oil chamber One of the gases in the room reaches a pressure balance.

The lifting device may further comprise an inner sleeve and an outer sleeve. The outer tube is sleeved in the outer sleeve, and the inner sleeve is sleeved in the outer sleeve and connected to the seat cushion support seat. The inner sleeve is displaced relative to the outer sleeve by the lifting rod, thereby adjusting the height of the seat support.

In the above lifting device, when the lifting rod is at a top dead center, the lower end of the guiding oil pipe extends to a lower oil level than the top dead center, so that the oil body flows out through the guiding oil pipe.

In another embodiment, a lifting device of the present invention comprises an outer tube, an inner tube, a lifting rod, an oil body, a control valve and a guiding oil pipe. The inner tube is sleeved in the outer tube, and an inner tube oil chamber is formed in the inner tube, and an outer tube oil chamber and an outer tube air chamber are formed between the inner tube and the outer tube. The lifting rod is sleeved in the inner tube and is displaceable relative to the inner tube. The oil body is filled in the inner tube oil chamber and the outer tube oil chamber, and flows and communicates between the inner tube oil chamber and the outer tube oil chamber to form an oil body passage. The control valve is disposed at one end of the outer tube. The control valve is opened or closed to switch the oil passage to open or close, so that the linear position of the lifting rod relative to the inner tube changes, thereby moving or positioning the lifting rod. The guiding oil pipe is disposed between the inner pipe and the outer pipe, and the guiding oil pipe is connected to the inner pipe oil chamber and the outer pipe oil chamber. After the oil passage is opened, the inner tube is displaced to push a redundant gas formed above the inner tube oil chamber, so that the redundant gas is guided through the guide oil pipe and flows back through the oil body passage to return to the outer tube air chamber.

In the above lifting device, the redundant gas is formed in the inner tube air chamber above one of the inner tube oil chambers. In addition, one end of the outer tube is connected to a pad support. The outer tube is a displacement of the inner tube to adjust the height of one of the seat support seats.

In the above lifting device, the control valve includes a valve seat and a valve member. The valve seat is fixed in the outer tube, and the valve member is disposed in the valve seat and displaced in the valve seat. The valve member is provided with a first groove. When the valve member is displaced and displaced, the valve member forms an opening with respect to the valve seat, and the oil body flows from the outer tube oil chamber through the guiding oil pipe through the first groove, and passes through the first A groove flows into the opening and flows into the inner tube oil chamber, thereby opening the oil passage. A second groove may be further disposed on the valve member. The second groove is located above the first groove. An air hole is arranged above the second groove. When the valve member is pressed down for the first time, the first groove moves downward relative to the valve seat to form an opening, so that the oil body in the outer tube oil chamber flows into the inner tube oil chamber through the guiding oil pipe, the first groove and the opening. When the valve member is pressed down for the second time, the air hole communicates with the second groove to form a passage for performing a replenishing action or an inflation action. An elastic member can be arranged in the valve seat. The elastic member accumulates an elastic restoring force when the valve member is pressed, and the elastic restoring force can return the valve member to a starting position to close the oil passage.

The lifting device can include an extension rod. The extension rod is sleeved in the lifting rod and is displaceable relative to the lifting rod. The lifting device can include an outer sleeve and an inner sleeve. The outer tube is sleeved in the inner sleeve, and the inner sleeve is sleeved in the outer sleeve. The inner sleeve is displaceable relative to the outer sleeve. The displacement of the lifting rod can drive the displacement of the outer tube relative to the inner sleeve.

In the above lifting device, the outer tube air chamber is formed above the outer tube oil chamber. The outer tube oil chamber and the outer tube air chamber are enclosed and coexisted between the inner tube and the outer tube, so that the oil in the outer tube oil chamber and the gas in the outer tube gas chamber are pressure balanced.

100‧‧‧ lifting device

110‧‧‧External management

111‧‧‧External tube oil room

112‧‧‧External air chamber

120‧‧‧Inside

121‧‧‧Inner pipe oil room

122‧‧‧ inner tube

130‧‧‧ Lifting rod

140‧‧‧Control valve

141‧‧‧ valve seat

141a‧‧‧ channel

142‧‧‧ valve parts

142a‧‧‧first groove

142b‧‧‧second groove

143‧‧‧ stomata

150‧‧‧Guided tubing

151‧‧‧ flow path

152‧‧‧ openings

160‧‧‧Activity agency

161‧‧‧Removable parts

162‧‧‧Put

180‧‧‧ gas nozzle

190‧‧‧Flexible parts

210‧‧‧Outer casing

220‧‧‧Inner casing

230‧‧‧Cushion support

240‧‧‧Extension rod

S‧‧‧Upper dead point stroke oil level

L‧‧‧ oil body

P1‧‧‧ oil body access

P2‧‧‧ pathway

1 is a perspective view showing the appearance of a lifting device according to an embodiment of the present invention; FIG. 2 is a cross-sectional view of FIG. 1; and FIG. 3 is a structural view of a lifting rod of the lifting device of FIG. 1; Figure 3 is a schematic view showing one of the operating states of the lifting rod of Figure 3; Figure 5 is a schematic view showing another operating state of the lifting rod of Figure 3; Figure 6 is a diagram showing another operating state of the lifting rod of Figure 3. FIG. 7 is a schematic view showing the appearance of an extension rod added to the lifting rod of FIG. 3; FIG. 8 is a perspective view showing the appearance of another embodiment of the lifting apparatus according to the present invention; FIG. 10 is a cross-sectional view showing the lifting device of FIG. 8; FIG. 11 is a cross-sectional view showing a part of the lifting device of FIG. 8; FIG. 11 is a schematic view showing an operation state of one of the control rods of FIG. 11; FIG. 14 is a schematic view showing an operation state of one of the control valves of FIG. 10; and FIG. 14 is a view showing another operation state of the control valve of FIG. 10; Figure 15 is a schematic view showing still another operational state of the control valve of Figure 10.

In the following description, specific embodiments of the present invention will be described with reference to the drawings. Many practical details will be mentioned in the following narrative Bright. However, these practical details should not be used to limit the novel. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, some of the conventional structures and elements are illustrated in the drawings in a simplified schematic manner, and the repeated elements may be represented by the same reference numerals.

Please refer to Figure 1, Figure 2 and Figure 3 together. 1 is a perspective view showing the appearance of a lifting device 100 according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing Fig. 1. Fig. 3 is a structural view showing the lifting rod 130 of the lifting device 100 of Fig. 1. In the first drawing, the lifting device 100 includes an outer sleeve 210, an inner sleeve 220 and a mat 230 as viewed from the outside. The inner sleeve 220 is sleeved in the outer sleeve 210 and is displaceable relative to the outer sleeve 210. The inner sleeve 220 is connected to a pad support 230. The height of the seat cushion support 230 can be adjusted by the displacement of the inner sleeve 220.

The internal structure of the lifting device 100 will be further described. From the second drawing, an outer tube 110, an inner tube 120, a lifting rod 130, an oil body L, a control valve 140 and a guiding oil pipe 150 are disposed in the outer casing 210 and the inner casing 220. The inner tube 120 is sleeved in the outer tube 110, and an inner tube oil chamber 121 is formed in the inner tube 120. An outer tube oil chamber 111 and an outer tube air chamber 112 are formed between the inner tube 120 and the outer tube 110. The lifting rod 130 is sleeved in the inner tube 120 and is displaceable relative to the inner tube 120. The inner sleeve 220 can be displaced by the lifting rod 130 and displaced relative to the outer sleeve 210, whereby the height of the seat cushion support 230 can be adjusted.

It should be noted that the present invention can move or position the lifting rod 130 based on the pressure balance of the oil body L and the gas mixture. Therefore, the oil body L is filled in the outer tube oil chamber 111 and the inner tube oil chamber 121. And, the oil body L can be used in the outer tube oil The chamber 111 and the inner tube oil chamber 121 are in flow communication to form an oil passage P1 (indicated in Fig. 5). The oil passage P1 can be opened or closed to determine the displacement and positioning of the lift rod 130. Further, an outer tube plenum 112 is formed above the outer tube oil chamber 111. The outer tube oil chamber 111 and the outer tube air chamber 112 are closed and coexisted between the inner tube 120 and the outer tube 110. Thereby, the gas in the outer tube plenum 112 and the oil body L in the outer tube oil chamber 111 are enclosed in the outer tube oil chamber 111 to achieve pressure balance.

To control the opening or closing of the oil passage P1, the control valve 140 is disposed at one end of the lift rod 130 and is displaceable with the lift rod 130. When the control valve 140 is opened or closed, the oil passage P1 can be switched on or off to change the linear position of the lifting rod 130 relative to the inner tube 120, thereby moving or positioning the lifting rod 130 and driving the inner sleeve 220 to move. Or positioning. In the second figure, the lifting device 100 further includes an actuating mechanism 160. The control valve 140 can be displaced by the actuation mechanism 160 to open the oil passage P1. Further, the actuating mechanism 160 includes a trigger member 161 and a push rod 162. The trigger member 161 is disposed inside the seat cushion support seat 230, and the push rod 162 is sleeved in the lift rod 130 and is displaceable relative to the lift rod 130. The linkage of the trigger member 161, the push rod 162, and the control valve 140 will be described in further detail later. The guiding oil pipe 150 is disposed between the inner pipe 120 and the outer pipe 110, and communicates with the inner pipe oil chamber 121 and the outer pipe oil chamber 111. The oil body L in the outer tube oil chamber 111 can be guided through the guide oil pipe 150 to flow into the inner tube oil chamber 121 to form the oil body passage P1.

The following is a description of the actuation mechanism of the lifting rod 130 and the return flow of the redundant gas in the lifting device 100 of the present invention. Please refer to Figure 4, Figure 5 and Figure 6 together. Figure 4 is a diagram showing one of the lifting rods 130 of Figure 3. FIG. 5 is a schematic view showing another actuating state of the lifting rod 130 of FIG. 3; FIG. 6 is a schematic view showing another operating state of the lifting rod 130 of FIG.

In Fig. 4, the lifting rod 130 is at a top dead center, and the position of the lifting rod 130 is the highest. At this time, the control valve 140 is still closed, so that the oil passage P1 between the outer tube oil chamber 111 and the inner tube oil chamber 121 is closed, so that the oil body L cannot flow and communicate with the outer tube oil chamber 111 and the inner tube oil chamber. 121, so the lifting rod 130 can not be displaced and positioned. In addition, in order to allow the oil body L in the outer tube oil chamber 111 to flow upward into the inner tube oil chamber 121, at the top dead center, the lower end of the guiding oil tube 150 needs to be lower than the upper dead point stroke oil. Surface height S.

In Fig. 5, when the height of the lifting rod 130 is to be adjusted to move downward from the highest position of the top dead center, the control valve 140 is opened by the actuating mechanism 160 of Fig. 2 to open the oil passage P1. More specifically, the control valve 140 includes a valve seat 141 and a valve member 142. The valve seat 141 is connected to the lifting rod 130 and displaced by the lifting rod 130. The valve member 142 is disposed in the valve seat 141 and is displaceable in the valve seat 141. A channel 141a is defined on one side of the valve seat 141, a first-class channel 151 is defined between the outer tube 110 and the inner tube 120, and a first groove 142a is defined in the valve member 142. When the triggering member 161 is pressed down and pushed against the push rod 162, the push rod 162 is pressed downward to push against the valve member 142, and the valve member 142 is pressed and displaced downward, thereby forming an opening with respect to the valve seat 141. 152. At this time, the oil body L is guided by the inner tube oil chamber 111 through the guide oil pipe 150, and flows upward to the flow path 151 between the outer tube 110 and the inner tube 120, and then flows downward from the flow path 151 toward the valve seat 141 side. The passage 141a flows through the first groove 142a of the valve member 142 and flows toward the opening The port 152 finally flows into the inner tube oil chamber 121, thereby opening the oil passage P1. At this time, the lifting rod 130 is free to move the adjustment position. An elastic member 190 is disposed in the valve seat 141 to abut the valve member 142. When the valve member 142 is pressed down, the elastic member 190 is pressed to accumulate an elastic restoring force. When the lifting rod 130 has been adjusted to the proper position and is to be positioned again, the trigger member 161 is released. At this time, the pressure applied to the push rod 162, the valve member 142 and the elastic member 190 is released, and the elastic member 190 releases the elastic restoring force of the accumulated state, so that the valve member 142 is displaced upward to the initial position thereof to close the oil passage P1, and the lift The rod 130 cannot be displaced and positioned. The push rod 162 is also displaced by the upward displacement of the valve member 142, and is also displaced upwardly to its starting position to prepare for the next opening of the control valve 140.

Continued description of the gas return flow mechanism in this novel. It is generally difficult to avoid the generation of redundant gas after a long period of use, or when the lifter 130 is in a stationary state. As shown in Fig. 5, redundant gas is generated at a position above the inner tube oil chamber 121, and an inner tube plenum 122 is formed. This redundant gas will affect the smoothness and accuracy of the displacement of the lift bar 130. Therefore, how to handle this redundant gas is crucial. To remove this redundant gas, as in Fig. 5, when the control valve 140 is displaced to open the oil passage P1, the lift rod 130 can be displaced downward relative to the inner tube 120 to adjust the height. When the lifting rod 130 continues to be displaced downward, the redundant gas in the inner tube plenum 122 above the inner tube oil chamber 121 will be pushed as the lifting rod 130 moves down. Therefore, the redundant gas will follow the direction opposite to the oil passage P1 opened in FIG. 5, and the inside of the inner tube oil chamber 121 passes through the opening 152, the passage 141a and the flow passage 151, and then returns downward through the guide oil pipe 150. It is returned to the outer tube oil chamber 111. At this time, since the outer tube air chamber 112 originally exists in the outer tube oil chamber 111, when the gas and the oil body L are mixed, the gas is inevitable. Under the characteristics of the oil body L, the redundant gas will return to the new pressure balance between the gas in the outer tube plenum 112 and the oil body L in the outer tube oil chamber 111. Thereby, the redundant gas in the inner tube oil chamber 121 is eliminated, and the displacement of the lifting rod 130 is smooth and accurately positioned. In addition, if it is used for a long period of time, it can also be connected to one of the outer nozzle oil chambers 111 to perform an oil filling operation or an inflation operation to maintain the oil body L and the outer tube air chamber 112 in the outer tube oil chamber 111. The pressure of the gas is balanced.

In Fig. 6, when the lifting rod 130 has moved down to the next dead center, it can no longer be displaced downward, and the lifting rod 130 is at the lowest position. At this time, if the control valve 140 is closed (ie, the elastic member 190 releases the elastic restoring force of its accumulation, the valve member 142 is displaced upward to its starting position), the oil passage P1 in Fig. 5 is also closed, and the oil is closed. The body L cannot flow in communication between the outer tube oil chamber 111 and the inner tube oil chamber 121, so that the lifting rod 130 can no longer be displaced and positioned.

Please continue to refer to Figure 7. Figure 7 is a schematic view showing the appearance of an extension rod 240 added to the lifting rod 130 of Figure 3. In Fig. 7, the lifting rod 130 is sleeved in the extension rod 240 and is displaceable relative to the extension rod 240. The extension rod 240 is sleeved in the inner tube 120 and is displaceable relative to the inner tube 120. Thereby, a multi-stage and more dense adjustment stroke can be formed, and the control of the adjustment height can be more precise.

In order to adapt to different use conditions, the lifting device 100 in Fig. 1 can change the relative position of the components therein. Please refer to FIG. 8 and FIG. 9 . FIG. 8 is a perspective view showing another embodiment of the lifting device 100 according to the present invention. FIG. 9 is a view showing the lifting device 100 of FIG. 8 folded to the most compact. Appearance perspective. In the lifting device 100 of Fig. 8, by its appearance, Basically similar to FIG. 1, it includes an outer sleeve 210 and an inner sleeve 220, but a plurality of outer tubes 110 are provided. A pad support seat 230 is connected to the outer tube 110. The outer tube 110 is sleeved in the inner sleeve 220 and is displaceable relative to the inner sleeve 220. The inner sleeve 220 is sleeved in the outer sleeve 210 and is displaceable relative to the outer sleeve 210. In Fig. 9, the outer sleeve 210, the inner sleeve 220 and the outer tube 110 are relatively displaced and folded to the most compact. Thereby, a multi-stage and more dense adjustment stroke can be formed, and the control of the adjustment height can be more precise.

Please continue to refer to Figures 10 through 12. Figure 10 is a cross-sectional view showing a lifting device 100 of Figure 8; Figure 11 is a cross-sectional view showing a portion of the lifting device 100 of Figure 8; and Figure 12 is a view showing one of the lifting rods 130 of Figure 11 Mechanism diagram. In the tenth figure, similar to the first embodiment of the first and second embodiments, an outer tube 110, an inner tube 120, a lifting rod 130, and an oil body L are also disposed in the outer sleeve 210 and the inner sleeve 220. A control valve 140 and a guide oil pipe 150. The inner tube 120 is also sleeved in the outer tube 110, and an inner tube oil chamber 121 is formed in the inner tube 120. An outer tube oil chamber 111 and an outer tube air chamber 112 are also formed between the inner tube 120 and the outer tube 110. . The difference from the embodiment of Fig. 2 is that the relative displacement directions of the outer tube 110, the inner tube 120 and the lifting rod 130 are different. In Fig. 10, the lifting rod 130 is also sleeved in the inner tube 120. However, the inner tube 120 is displaced relative to the lifting rod 130, thereby driving the outer tube 110 to be displaced relative to the lifting rod 130. The seat cushion support 230 is oppositely disposed above the outer tube 110, and the height of the seat cushion support 230 can be adjusted by the displacement of the outer tube 110. The difference is based on the embodiment in FIG. 2, and the inner tube 120 and the outer tube 110 can be fixed in the outer sleeve 210 without displacement. In the present invention, the inner tube 120 and the outer tube 110 are mutually Set up to form a mixture of oil and gas, in fact, It is integrally formed. At this time, in the second figure, the outer sleeve 210 constitutes a part of the bicycle seat tube and is fixed. Therefore, the lifting rod 130 is displaced relative to the inner tube 120 and the inner sleeve 220 is displaced relative to the outer sleeve 210, because the seat cushion support 230 The system is disposed on the inner sleeve 220, so that the height of the seat support seat 230 can be adjusted by the displacement of the inner sleeve 220. In Fig. 10, the lifting rod 130 can be seen to be relatively fixed in the inner sleeve 220 without displacement (i.e., the inner sleeve 220 constitutes a part of the bicycle seat tube and is fixed). In the figure 10, the outer sleeve 210 is formed to cooperate with the extension rod 240 to form a plurality of adjustment strokes. In fact, the arrangement of the outer sleeve 210 and the extension tube 240 may be omitted. At this time, the inner tube 120 can be displaced relative to the lifting rod 130. Since the inner tube 120 and the outer tube 110 are integrated, the inner tube 120 drives the outer tube 110 to be displaced. Since the seat cushion supporting seat 230 is assembled on the outer tube 110, Therefore, the height of the seat cushion support 230 can be adjusted by the displacement of the outer tube 110.

The operation mechanism of the lifting rod 130 will be described later in FIGS. 11 and 12. Depending on the mode of use, in Fig. 11, the control valve 140 is not disposed at one end of the lifting rod 130 in the embodiment of Fig. 2 and is displaced by the lifting rod 130. The control valve 140 in Fig. 11 is disposed at one end of the outer tube 110. The control valve 140 includes a valve seat 141 and a valve member 142. The valve seat 141 is fixed in the outer tube 110, and the valve member 142 is assembled in the valve seat 141 to be displaced in the valve seat 141. The valve member 142 is provided with a first recess 142a. When the valve member 142 is depressed and displaced, the valve member 142 forms an opening 152 with respect to the valve seat 141. At this time, the oil body L flows upward from the outer tube oil chamber 111 through the guiding oil pipe 150 through the first groove 142a, and flows downward through the first groove 142a to the opening 152 to flow into the inner tube oil chamber 121, thereby opening the oil. Body path P1. At this time, the inner tube 120 can be freely opposed to the lifting rod 130. Move to adjust the position. An elastic member 190 is disposed in the valve seat 141 to abut the valve member 142. When the valve member 142 is pressed down, the elastic member 190 is pressed to accumulate an elastic restoring force. When the inner tube 120 has been adjusted to the proper position relative to the lift rod 130 and is to be positioned again (as in Fig. 12), the valve member 142 is released. At this time, the pressure received by the valve member 142 and the elastic member 190 is released, and the elastic member 190 releases the elastic restoring force of the accumulation, so that the valve member 142 is displaced upward to the initial position thereof to close the oil passage P1, and the lift rod 130 cannot be displaced. The inner tube 120 is also relatively incapable of being displaced and positioned. In the 11th and 12th drawings, since the setting of the extension rod 240 is increased by forming a plurality of adjustment strokes, the oil body L is also in communication with the lifting rod 130, so that the extension rod 240 sleeved in the lifting rod 130 can be displaced. . As described above, the extension rod 240 can be omitted if there is no need to adjust the stroke in multiple stages.

Continued description of the gas return flow mechanism of the present invention. As shown in Fig. 11, after standing or for a long time of use, redundant gas is generated at a position above the inner tube oil chamber 121, and an inner tube plenum 122 is formed. This redundant gas will affect the smoothness and accuracy of the displacement of the inner tube 120 relative to the lift rod 130. In order to remove the redundant gas, as shown in FIG. 11, when the control valve 140 is displaced to open the oil passage P1, the inner tube 120 can be continuously displaced downward relative to the lift rod 130. At this time, the inner tube oil chamber 121 is above. The redundant gas in the inner tube plenum 122 will be pushed as the inner tube 120 moves down. Therefore, the redundant gas will follow the direction opposite to the oil passage P1 opened in FIG. 11 , and the inside of the inner tube oil chamber 121 passes through the opening 152 and the first recess 142a, and then returns to the flow back through the guide oil pipe 150. It is inside the outer tube oil chamber 111. At this time, since the outer tube plenum 112 exists in the outer tube oil chamber 111, the gas is inevitably above the oil body L when the gas and the oil body L are mixed, and the redundant gas will be returned to the outer tube gas. Gas and outer tube oil in chamber 112 The oil body L in the chamber 111 reaches a new pressure balance. Thereby, the redundant gas in the inner tube oil chamber 121 is eliminated, so that the displacement of the inner tube 120 relative to the lifting rod 130 is smooth and accurately positioned.

Please continue to refer to Figures 13 through 15. FIG. 13 is a schematic view showing an operation state of one of the control valves 140 of FIG. 10; FIG. 14 is a view showing another operation state of the control valve 140 of FIG. 10; and FIG. 15 is a view showing the control valve of FIG. 140 is another schematic diagram of the operating state.

Please refer to Figure 11 together. In Fig. 13, the valve member 142 of the control valve 140 is provided with a first recess 142a and another second recess 142b. The second groove 142b is located above the first groove 142a. An air hole 143 is disposed above the second groove 142b (see Fig. 15). At this time, since the valve member 142 is not pressurized, the oil body L cannot flow and communicate with the outer tube oil chamber 111 and the inner tube oil chamber 121, and the oil body passage P1 is not opened. In Fig. 14, when the valve member 142 is pressed down for the first time, the first groove 142a moves downward relative to the valve seat 141 to form an opening 152, so that the oil body L of the outer tube oil chamber 111 flows through the guide oil pipe 150, The first groove 142a and the opening 152 flow into the inner tube oil chamber 121, thereby opening the oil passage P1. In Fig. 15, when the valve member 142 is pressed down for the second time, the air hole 143 communicates with the second recess 142b to form a passage P2. Thereby, the oil filling operation or the inflation operation can be performed in the outer tube oil chamber 111 through the passage P2 to maintain the pressure balance.

In summary, the lifting device 100 provided by the present invention is configured to mix and seal the oil body L and the gas between the outer tube 110 and the inner tube 120, and then balance the pressure of the oil body L and the gas, so that the lifting rod 130 or the outer portion The tube 110 is provided with smooth movement and precise positioning. At the same time, the control valve 140 disposed at different positions is also used to cooperate with the displacement of the lifting rod 130 and to guide the oil pipe 150. The guidance provides a reset return mechanism of the redundant gas to avoid failure or misalignment when the lift rod 130 or the outer tube 110 is displaced.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application.

Claims (20)

A lifting device comprising: an outer tube; an inner tube sleeved in the outer tube, wherein an inner tube oil chamber is formed in the inner tube, and an outer tube oil chamber is formed between the inner tube and the outer tube An outer tube air chamber; a lifting rod sleeved in the inner tube and displaced relative to the inner tube; an oil body filled in the inner tube oil chamber and the outer tube oil chamber, and in the inner tube An oil passage is formed between the oil chamber and the outer tube oil chamber; a control valve is disposed at one end of the lifting rod and displaced with the lifting rod, and the control valve is opened or closed to switch the oil passage Opening or closing, causing a change in linear position of the lifting rod relative to one of the inner tubes, thereby moving or positioning the lifting rod; and a guiding oil pipe disposed between the inner tube and the outer tube, the guiding oil pipe Connecting the inner tube oil chamber and the outer tube oil chamber; wherein, after the oil body passage is opened, the lifting rod is displaced to push a redundant gas formed above the inner tube oil chamber to allow the redundant gas to pass through the The guiding oil pipe is guided and returned to the outer pipe air chamber through the oil body passage. The lifting device of claim 1, wherein the redundant gas is formed in an inner tube chamber above the inner tube oil chamber. The lifting device according to claim 1, further comprising: a gas nozzle that communicates with the outer tube oil chamber, and performs an oil filling operation or an inflation operation through the gas nozzle. The lifting device of claim 1, further comprising: an extension rod disposed in the extension rod and displaced relative to the extension rod, the extension rod being sleeved in the inner tube, and Relative to the inner tube displacement. The lifting device according to claim 1, further comprising an actuating mechanism that is controlled by the actuating mechanism to generate displacement, thereby opening the oil passage. The lifting device of claim 5, wherein the control valve comprises a valve seat and a valve member, the valve seat is connected to the lifting rod and is displaced with the lifting rod, and the valve member is disposed in the valve seat And a displacement is formed in the valve seat, a passage is formed on one side of the valve seat, and a first-stage passage is formed between the outer tube and the inner tube, and the valve member is provided with a first groove, when the actuating mechanism is pressed down, the The valve member is displaced by the pressing mechanism, and an opening is formed in the valve seat, the oil body is transmitted from the outer tube oil chamber through the guiding oil pipe, and the flow channel flows to the through hole And flowing into the inner tube oil chamber through the first groove to the opening, thereby opening the oil body passage. The lifting device of claim 6, wherein the actuating mechanism comprises a trigger member and a push rod, the trigger member is disposed inside a pad support seat, and the push rod is sleeved on the lift a rod is displaced relative to the lifting rod, and when the pulling member is pressed down to push against the pushing rod, the pushing rod is pressed downward to push against the valve member, and the valve member is pressed and displaced downward, and further The opening is formed in the valve seat. The lifting device of claim 7, wherein the valve seat is provided with an elastic member, and the elastic member accumulates an elastic restoring force when the valve member is pressed, and the valve member is reset by the elastic restoring force. The oil passage is closed to a starting position. The lifting device of claim 8, further comprising: an outer sleeve, the outer tube is sleeved in the outer sleeve; and an inner sleeve, the inner sleeve is sleeved in the outer sleeve, The inner sleeve is connected to the seat support, and the inner sleeve is displaced relative to the outer sleeve by the lifting rod, thereby adjusting a height of the seat support. The lifting device of claim 1, wherein the outer tube air chamber is formed above the outer tube oil chamber, and the outer tube oil chamber and the outer tube air chamber are enclosed and coexisted in the inner tube and the outer tube The oil body in the outer tube oil chamber and the gas in the outer tube gas chamber are brought into pressure balance. The lifting device of claim 1, wherein when the lifting rod is at a top dead center, the lower end of the guiding oil pipe extends to a level lower than a top dead center stroke oil level to allow the oil body to pass through the The guiding oil pipe flows out. A lifting device comprising: an outer tube; an inner tube sleeved in the outer tube, wherein an inner tube oil chamber is formed in the inner tube, and an outer tube oil chamber is formed between the inner tube and the outer tube An outer tube, a lifting rod is sleeved in the inner tube, and the inner tube is displaced relative to the lifting rod, thereby driving the outer tube to be displaced relative to the lifting rod; an oil body is filled in the inner tube An oil chamber and the outer tube oil chamber, and flowing between the inner tube oil chamber and the outer tube oil chamber to form an oil body passage; a control valve disposed at one end of the outer tube, the control valve being opened Or shutting down and switching the oil passage to open or close, so that the inner tube is opposite to the rise a linear position of the descending rod changes to move or position the inner tube; and a guiding oil pipe disposed between the inner tube and the outer tube, the guiding oil pipe connecting the inner tube oil chamber and the outer tube An oil chamber; wherein, after the oil passage is opened, the inner tube is displaced to push a redundant gas formed above the inner tube oil chamber, and the redundant gas is guided through the guide oil tube and flows through the The oil body passage is returned to the outer tube chamber. The lifting device of claim 12, wherein the redundant gas is formed in an inner tube chamber above the inner tube oil chamber. The lifting device of claim 12, wherein one end of the outer tube is connected to a pad support seat, and the outer tube is displaced by the inner tube to adjust a height of the seat support. The lifting device of claim 12, wherein the control valve comprises a valve seat and a valve member, the valve seat is fixed in the outer tube, and the valve member is disposed in the valve seat Displacement in the valve seat, the valve member is provided with a first groove. When the valve member is displaced and displaced, the valve member forms an opening with respect to the valve seat, and the oil body is transmitted through the outer tube oil chamber. The oil guiding pipe flows through the first groove, and flows into the inner pipe oil chamber through the first groove to the opening, thereby opening the oil body passage. The lifting device of claim 15, wherein the valve member is further provided with a second groove, the second groove is located above the first groove, and an air hole is arranged above the second groove. When the valve member is pressed down for the first time, the first groove moves downward relative to the valve seat to form the opening, so that the oil body in the outer tube oil chamber passes through the guiding oil pipe, the first groove and The opening flows into the inner tube oil chamber; when the valve member is pressed down for the second time, the air hole communicates with the second groove to form a passage for performing an oil filling operation or an inflation operation. The lifting device of claim 16, wherein the valve seat is provided with an elastic member, and the elastic member accumulates an elastic restoring force when the valve member is pressed, and the valve member is reset by the elastic restoring force. The oil passage is closed to a starting position. The lifting device of claim 12, further comprising: an extension rod disposed in the lifting rod and displaced relative to the lifting rod. The lifting device of claim 12, wherein the outer tube air chamber is formed above the outer tube oil chamber, the outer tube oil chamber and the The outer tube chamber is enclosed and coexisted between the inner tube and the outer tube, so that the oil body in the outer tube oil chamber and a gas in the outer tube gas chamber are pressure balanced. The lifting device of claim 12, further comprising: an outer sleeve; and an inner sleeve, the outer sleeve is sleeved in the inner sleeve, and the inner sleeve is sleeved in the outer sleeve The inner sleeve is displaced relative to the outer sleeve, and the displacement of the lifting rod drives the outer tube to be displaced relative to the inner sleeve.