TWM564589U - Elevating device - Google Patents

Abstract

An elevating device includes an outer tube, an inner tube, an elevating lever, an oil and a control valve. 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. The oil is filled in the inner oil room and the outer oil room and an oil route is formed. The control valve can be controlled to open or close the oil route, thereby moving or positioning the elevating lever. A central axis of the control valve and a central axis of the inner tube are not aligned. 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. 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 can also perform the return flow of the redundant gas by using the displacement of the lifting rod and the displacement of the control valve, thereby increasing the smoothness and accuracy of the displacement of the lifting rod, and the adjustment can be achieved without any step.

In one embodiment, the present invention provides a lifting device comprising an outer tube, an inner tube, a lifting rod, an oil body and a control valve. The inner tube is sleeved in the outer tube, wherein 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 between the outer tube and the inner tube. One of the central axes of the control valve is not in line with the central axis of one of the inner tubes. The control valve can be displaced to switch the opening or closing of the oil passage, thereby causing a change in the linear position of the lift rod relative to the inner tube, thereby moving or positioning the lift rod. Wherein, after the oil passage is opened, the lifting rod can be moved to push a redundant gas above the oil chamber of the inner tube, so that the redundant gas is returned to the outer tube through the oil passage.

In the above lifting device, the redundant gas is formed in the inner tube air chamber above one of the inner tube oil chambers. One end of the lifting rod can be connected to a pad support, and the lifting rod can be displaced to adjust the height of one of the seat support seats.

The lifting device may further comprise a gas nozzle. The gas nozzle communicates with the outer tube oil chamber, and can perform a replenishing action or an inflating action through the gas nozzle.

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

In the above lifting device, the control valve is disposed at a position below the outer tube. The central axis of the control valve may be parallel or perpendicular to the central axis of the inner tube, and the control valve is at a distance from the inner tube.

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.

The lifting device further comprises an outer tube sleeve and an inner tube sleeve. The outer tube is sleeved in the outer tube sleeve, the inner tube sleeve is sleeved in the outer tube sleeve, and the inner tube sleeve is interlocked with the lifting rod and can be displaced relative to the outer tube sleeve.

In the above lifting device, the control valve may be provided with an elastic member. The control valve is initially located at a starting position to close the oil passage. When the control valve is displaced to open the oil passage, the control valve can be returned to the starting position through the elastic member.

100‧‧‧ lifting device

110‧‧‧External management

111‧‧‧External tube oil room

112‧‧‧External air chamber

113‧‧‧ Oil body access

120‧‧‧Inside

121‧‧‧Inner pipe oil room

122‧‧‧ inner tube

130‧‧‧ Lifting rod

140‧‧‧Control valve

150‧‧‧Extension rod

160‧‧‧ gas nozzle

170‧‧‧Flexible parts

210‧‧‧Outer tube casing

310‧‧‧Inner tube casing

410‧‧‧Cushion support

S1, S2‧‧‧ central axis

L‧‧‧ oil body

1 is a perspective view showing the appearance of a lifting device according to an embodiment of the present invention; and FIG. 2 is a cross-sectional view showing the lifting device of FIG. 1; 3 is a partial enlarged view of the lifting device of FIG. 2; FIG. 4 is a view showing an operation state of one of the lifting rods in the lifting device of the first embodiment of the present invention; FIG. 5 is a fourth drawing FIG. 6 is a view showing another operation state of the lifting rod in the lifting device of the first embodiment of the present invention; and FIG. 7 is an enlarged view of the lifting device of FIG. 8 is a schematic diagram showing a gas return flow reversal mechanism in the lifting device of the first embodiment of the present invention; FIG. 9 is an enlarged view of the lifting device of FIG. 8; and FIG. 10 is a diagram showing another A schematic diagram of the state of use of the extension rod of the lifting device of an embodiment.

In the following description, specific embodiments of the present invention will be described with reference to the drawings. Many practical details will be explained in the following description. 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 the lifting device 100 of Fig. 1. Figure 3 shows the second picture A partially enlarged view of the lifting device 100. In the first diagram, the lifting device 100 includes an outer tube sleeve 210 and an inner tube sleeve 310. The inner tube sleeve 310 is sleeved in the outer tube sleeve 210 and is displaceable relative to the outer tube sleeve 210. The inner tube sleeve 310 is coupled to a pad support 410. The height of the seat support 410 can be adjusted by the displacement of the inner tube sleeve 310.

The internal structure of the lifting device 100 will be further explained. The lifting device 100 includes an outer tube 110, an inner tube 120, a lifting rod 130, an oil body L and a control valve 140. 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, and an outer tube oil chamber 111 is 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. One end of the lifting rod 130 is connected to the seat cushion support 410, and the lifting rod 130 is coupled to the displacement of the inner tube sleeve 310. In other words, when the lifting rod 130 is displaced, the inner tube sleeve 310 is also displaced and displaced, whereby the height of the seat cushion support 410 can be adjusted.

The present invention is based on the pressure balance of the oil body L and the gas mixture to move or position the lifting rod 130. 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 flows in communication with the outer tube oil chamber 111 and the inner tube oil chamber 121 to form an oil passage 113. The oil passage 113 can be opened or closed to determine the displacement and positioning of the lift rod 130. Further, an outer tube plenum 112 is further 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 113, the control valve 140 is disposed between the outer tube 110 and the inner tube 120. The control valve 140 is disposed at a position below the outer tube 110. One of the central axes S1 of the control valve 140 is not in line with the central axis S2 of the inner tube 120. At the same time, the control valve 140 can be displaced to switch the oil passage 113 to be opened or closed, causing a change in the linear position of the lift rod 130 relative to the inner tube 120, thereby moving or positioning the lift rod 130. The control valve 140 is arranged in such a manner that, as shown in FIG. 3, one central axis S1 of the control valve 140 is parallel to a central axis S2 of the inner tube 120, but the control valve 140 is at a distance from the inner tube 120, One central axis S1 of the control valve 140 may be perpendicular to a central axis S2 of the inner tube 120 (not shown), but the control valve 140 is at a distance from the inner tube 120. For example, as depicted in FIG. 3, the control valve 140 is parallel to the inner tube 120 and at a distance (straight configuration). In addition, the control valve 140 may also be disposed perpendicular to the inner tube 120 (lateral configuration). In this arrangement, the mechanism for controlling the opening or closing of the oil passage 113 is staggered from the mechanism for controlling the return flow of the gas, and has flexibility in use. The mechanism for gas return reflow will be described in more detail in the following paragraphs.

Please continue to refer to Figure 4 and Figure 5. Fig. 4 is a view showing an operation state of one of the lifting rods 130 in the lifting device 100 of the first embodiment of the present invention; and Fig. 5 is an enlarged view of the lifting device 100 of the fourth drawing. In Figures 4 and 5, the lifting rod 130 is in a positioned state. At this time, the control valve 140 is displaced to a starting position (ie, the position of the oil body passage 113 is blocked), so that the oil body L in the outer tube oil chamber 111 and the oil body L in the inner tube oil chamber 121 cannot flow and communicate. The lifting rod 130 cannot be displaced and positioned.

Please continue to refer to Figure 6 and Figure 7. Fig. 6 is a view showing another operational state of the lifting rod 130 in the lifting device 100 of the first embodiment of the present invention; and Fig. 7 is an enlarged view of the lifting device 100 of Fig. 6. In Figs. 6 and 7, the lifting rod 130 is in a movable state. At this time, the control valve 140 is displaced to a position that does not block the oil body passage 113, so that the oil body L in the outer tube oil chamber 111 and the oil body L in the inner tube oil chamber 121 can be in flow communication, so that the lifting rod 130 can be The oil body L of the inner tube oil chamber 121 is displaced, and the linear position of the lifting rod 130 relative to the inner tube 120 can be adjusted in a stepless manner, thereby instantly adjusting the height of the seat support base 410. When the lifting rod 130 is adjusted to the proper position, the control valve 140 can be returned to the starting position (ie, the position of the oil passage 113 is blocked) by the restoring force of the elastic member 170 that is disposed through the control valve 140. At this time, the oil passage 113 is closed again, and the oil body L in the outer tube oil chamber 111 and the oil body L in the inner tube oil chamber 121 cannot flow in communication, so that the lifting rod 130 cannot be displaced and positioned again, the seat cushion The height of the support base 410 is relatively fixed. It should be noted that the above-mentioned reset mode using the elastic member 170 is only one of the embodiments, and the other modes (screw lock, snap, etc.) can return the control valve 140 to the starting position.

Continued description of the gas return flow mechanism in this novel. FIG. 8 is a schematic view showing a gas return flow reversal mechanism in the lifting device 100 according to the first embodiment of the present invention; and FIG. 9 is an enlarged view of the lifting device 100 in FIG. It is still difficult to avoid the generation of redundant gas after the lifting device 100 is used for a long period of time, or when the lifting rod 130 is in the positioning state and is allowed to stand. As shown in Fig. 8, the redundant gas is generated at a position above the inner tube oil chamber 121 (Fig. 8, the redundant gas forms the inner tube plenum 122 above the inner tube oil chamber 121). This redundant gas will affect the smoothness and accuracy of the displacement of the lift bar 130. So how to handle this Redundant gases are critical. The present invention discloses a simple structure that can handle this redundant gas. When the control valve 140 is displaced to open the oil passage 113, the lift rod 130 can be displaced downward relative to the inner tube 120 to adjust the height. In Fig. 9, when the lifting rod 130 is moved to the bottom dead center, the lifting rod 130 can no longer be displaced downward. At this time, 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 pass through the opened oil passage 113 and be returned to the outer tube oil chamber 111 by the inner tube oil chamber 121. 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. The gas in chamber 122 and the oil body L in the outer tube oil chamber reach a new pressure balance. Thereby, the redundant gas in the inner tube oil chamber 121 is eliminated, so that the displacement of the lifting rod 130 is smooth and accurately positioned. In addition, the new lifting device 100 can further include a gas nozzle 160 that communicates with the outer tube oil chamber 111 and can perform an oil filling operation or an inflation operation. Therefore, after a period of use, the pressure balance of the gas in the outer oil chamber 111 and the gas in the outer tube plenum 112 can be maintained through the gas nozzle 160.

Please refer to Figure 10. FIG. 10 is a schematic view showing the state of use of the extension rod 150 according to another embodiment of the present invention. In FIG. 10, the lifting device 100 further includes an extension rod 150. The lifting rod 130 is sleeved in the extension rod 150 and displaced relative to the extension rod 150, and the extension rod 150 is sleeved in the inner tube 120 and displaced relative to the inner tube 120. . Thereby, the displacement stroke of the lifting rod 130 can be increased, and the flexibility in use can be improved.

In summary, the lifting device 100 provided by the present invention is formed by mixing the oil body L and the gas together between the outer tube 110 and the inner tube 120, and then Through the pressure balance of the oil body L and the gas, the lifting rod 130 can be smoothly moved and accurately positioned. At the same time, by using the control valve 140 which is arranged in a staggered manner with the inner tube 120 and the displacement of the lifting rod 130, the return flow mechanism of the redundant gas can be provided, and the failure or misalignment condition can be avoided when the lifting rod 130 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 (10)

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 in the flow communication between the oil chamber and the outer tube oil chamber; and a control valve is disposed between the outer tube and the inner tube, and a central axis of the control valve and a central axis of the inner tube Not in the same line, the control valve is displaced to switch the oil passage to open or close, so that the lifting rod changes with respect to a linear position of the inner tube, thereby moving or positioning the lifting rod; wherein, the oil body After the 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 returned to the outer tube 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 of claim 1, wherein one end of the lifting rod is connected to a pad support, and the lifting rod is displaced to adjust a height of the seat support. 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 opposite to the Inner tube displacement. The lifting device of claim 1, wherein the control valve is disposed at a position below the outer tube, the central axis of the control valve is parallel to the central axis of the inner tube, and the control valve is spaced apart from the inner tube distance. The lifting device of claim 1, wherein the control valve is disposed at a position below the outer tube, the central axis of the control valve The line is perpendicular to the central axis of the inner tube and the control valve is at a distance from the inner tube. 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, further comprising: an outer tube sleeve, the outer tube sleeve is disposed in the outer tube sleeve; and an inner tube sleeve, the inner tube sleeve is sleeved on In the outer tube sleeve, the inner tube sleeve is displaced relative to the outer tube sleeve by the lifting rod. The lifting device of claim 1, wherein the control valve is provided with an elastic member, the control valve is initially located at a starting position to close the oil passage, and when the control valve is displaced to open the oil passage Thereafter, the control valve is returned to the starting position by the elastic member.