TWM531424U - Height adjusting device - Google Patents

Abstract

A height adjusting device includes an outer tube, an inner tube, an oil-seal assembly, a control assembly, a piston, a piston rod and a piston pin. The inner tube is disposed within the outer tube, and an accommodating space is formed between the outer tube and the inner tube. The oil-seal assembly is disposed at an end of the outer tube and the control assembly is disposed at the other end of the outer tube. The piston is disposed within the inner tube. The piston rod passes through the oil-seal assembly and the piston. The piston pin passes through the control assembly. An oil room is formed between the control assembly and the piston and communicates with the accommodating space on at least one operation state. An air room is formed between the oil-seal assembly and the piston and communicates with the accommodating space at the operation state. The control assembly includes an oil hole communicating with the accommodating space, and the oil-seal assembly includes an air hole communicating with the accommodating space. The size of the air hole is less than that of a gap between the piston pin and the control assembly at the operation state and less than that of the oil hole.

Description

Lifting device

The present invention relates to a lifting device, and more particularly to an improved lifting device.

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.

In the conventional lifting device, the gas is in the same tube body, so the space occupied by the gas (air chamber) is limited. When the piston rod is raised, the air chamber space becomes small, and the internal pressure value becomes large. If the piston rod is to be lowered, a larger external force must be applied.

In addition, the rate of rise of the piston rod depends on the size of the passage (gap) between the piston pin and the control valve and the size of the oil hole. However, if the rate of rise of the piston rod (i.e., the rate at which the bicycle seat cushion is raised) is lowered, it is necessary to reduce the hole diameter of the oil hole and increase the difficulty in processing. Even if the pore size of the oil hole is reduced, the oil body frequently flows and rubs against the oil hole of the small hole diameter to cause the oil body to be more likely to generate heat, thereby causing deterioration of the internal O-ring or the oil seal, so that the leakage prevention effect is lowered.

Therefore, how to provide an improved lifting device can solve the above problems, thereby improving the performance of the lifting device.

In view of the above problems, it is an object of the present invention to provide a lifting device that can solve the problems of the prior art and thereby improve the performance of the lifting device.

To achieve the above object, a lifting device of the present invention comprises an outer tube, an inner tube, an oil seal assembly, a control assembly, a piston, a piston rod and a piston pin. The inner tube is disposed in the outer tube, and an accommodation space is formed between the outer tube and the inner tube. The oil seal assembly is disposed at one end of the outer tube. The control component is disposed at the other end of the outer tube. The piston is disposed in the inner tube. The piston rod is provided with an oil seal assembly and a piston. The piston pin is threaded through the control assembly. Wherein, an oil chamber is formed between the control component and the piston, and communicates with the accommodating space in at least one operating state, and an air chamber is formed between the oil seal assembly and the piston, and communicates with the accommodating space in the operating state. And the control component has an oil hole communicating with the accommodating space, the oil seal assembly has an air hole communicating with the accommodating space, and the size of the air hole is smaller than the size of the gap between the piston pin and the control component in the operating state and smaller than the oil hole Size, which in turn slows the rate at which the piston rod rises.

In an embodiment, the lifting device further comprises a C-shaped buckle embedded in the piston rod and located between the oil seal assembly and the piston.

In an embodiment, the lifting device further includes a stop member disposed between the C-shaped buckle and the piston.

In one embodiment, the stop member is made of a material that has tiny air holes but does not absorb oil.

In an embodiment, the lifting device further includes a floating piston disposed within the accommodating space.

In one embodiment, the oil seal assembly comprises an oil seal seat, an oil seal and a Palin, the oil seal seat abuts the outer tube, the Palin top abuts the inner tube, and the oil seal is disposed between the oil seal seat and the Palin.

In an embodiment, the air holes are disposed in the Palin.

In one embodiment, the control assembly includes a mounting seat and a control valve, the mounting top abuts the outer tube, and the control valve top abuts the inner tube and is coupled to the mounting seat.

In an embodiment, the gap exists between the piston pin and the control valve of the control assembly in the operational state.

In one embodiment, the piston pin includes a sealing portion, a slope portion and a small diameter portion, wherein an outer diameter of one of the small diameter portions is smaller than an outer diameter of the sealing portion, and the inclined surface portion is disposed at the sealing portion and the small diameter portion between.

As described above, in the lifting device of the present invention, the space of the air chamber can be increased by the arrangement of the inner tube and the outer tube, so that when the piston rod rises, the gas flows from the inner tube to the outer tube, and the internal pressure value does not change much. Therefore, the force applied to lower the piston rod can be relatively small (that is, the occupant on the seat cushion has a small force to press down). In addition, with the arrangement of the inner tube and the outer tube of the present invention, the height of the lifting device of the present invention can be reduced under the same moving stroke with the conventional piston rod, so that the novel device can be mounted on the frame. There is more space to be used (for example, a motor is provided to act as a moving rod); in addition, the height of the lifting device of the present invention can be increased in the case where it is necessary to increase the moving stroke of the piston rod, and still conform to the size of the general frame. .

In addition, by providing a gas hole in the oil seal assembly, and the size of the air hole is smaller than the size of the gap (channel) of the piston pin in the operating state and the control unit, and is smaller than the size of the oil hole of the control unit, the gap can be avoided. In the general design of the oil hole, the oil will bring the gas into the oil chamber when it flows, so that the piston rod can be surely rendered stationary (the occupant on the seat cushion will not feel a slight up and down vibration), if any When the gas runs into the oil chamber, the gas can be compressed so that the piston rod cannot be surely stationary (the occupant on the seat cushion will feel a slight up and down vibration). With the above arrangement of the present invention, the performance of the lifting device can be improved. The lifting device of the present invention can be applied to any suitable field, for example, for a bicycle seat lifting mechanism, but the present invention is not limited thereto.

In addition, the piston pin of the lifting device of the present invention has an annular bevel, and an oil body can flow between the oil chamber and the accommodating space via the annular bevel. 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 lifting device.

1 is a schematic view of a combination of a lifting device 1 according to a preferred embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a lifting device 1 according to a preferred embodiment of the present invention. The lifting device 1 of the present invention can be applied to any suitable field, for example, for a bicycle seat lifting mechanism, but the present invention is not limited thereto.

As shown in FIG. 1 and FIG. 2, the lifting device 1 of the present embodiment includes an outer tube 11, an inner tube 12, an oil seal assembly 13, a control assembly 14, a piston 15, a piston rod 16, and a piston. Pin 17. The inner tube 12 is disposed in the outer tube 11, and an accommodation space AS is formed between the outer tube 11 and the inner tube 12. In the present embodiment, the accommodating space AS allows an oil body and a gas to flow.

The oil seal assembly 13 is disposed at one end of the outer tube 11. In the present embodiment, the oil seal assembly 13 includes an oil seal seat 131, an oil seal 132 and a Palin 133. The oil seal seat 131 abuts against the outer tube 11, the Palin 133 abuts against the inner tube 12, and the oil seal 132 is disposed on the oil seal seat 131. Between Palin 133. Further, the oil seal 132 is abutted against the oil seal seat 131 and the Palin 133 so that the oil seal 132, the oil seal seat 131 and the Palin 133 are fixed to each other.

The control assembly 14 is disposed at the other end of the outer tube 11. In this embodiment, the control assembly 14 includes a mounting base 141 and a control valve 142. The mounting base 141 abuts against the outer tube 11. The control valve 142 abuts against the inner tube 12 and is connected to the mounting base 141, and the mounting base 141 and the control The valves 142 are fixed to each other.

The piston 15 is disposed in the inner tube 12. Here, the piston 15 is further disposed in the inner tube 12 by an O-ring 101, and the O-ring 101 contacts the inner tube 12 and the piston 15. The piston rod 16 is passed through the oil seal assembly 13 and the piston 15. Here, the piston rod 16 is further disposed on the piston 15 by a gasket 102 that contacts the inner tube 12, the piston 15, and the piston rod 16.

Wherein, an oil chamber OR is formed between the control unit 14 and the piston 15, and the oil chamber OR is filled with an oil body O. The oil chamber OR can be in communication with the accommodating space AS in at least one operating state. Here, the control unit 14 has an oil hole OH communicating with the accommodating space AS. In the present embodiment, the oil hole OH is provided in the control valve 142. An air chamber AR is formed between the oil seal assembly 13 and the piston 15, and communicates with the accommodating space AS in at least one operating state. Here, the oil seal assembly 13 has a gas hole AH communicating with the accommodating space AS. In the present embodiment, the air holes AH are disposed in the Palin 133, and the size of the air holes AH is smaller than the size of the oil holes OH. In addition, the size of the air vent AH is also smaller than the size of the gap (channel) of the piston pin in the operating state with the control assembly 14.

In addition, in the embodiment, the lifting device 1 further includes a piston pin 17 and an actuating lever 18. The piston pin 17 is threaded through the control assembly 14 and the actuating rod 18 is abutted against the piston pin 17. By actuation of the user, the actuating lever 18 can be actuated to bring the piston pin 17 up. In this operation, the oil body O and the gas in the lifting device 1 flow, so that the piston rod 16 rises or falls, thereby driving the seat cushion to rise or fall. In the present embodiment, the lifting device 1 further includes a C-shaped buckle 19 embedded in the piston rod 16 and located between the oil seal assembly 13 and the piston 15. When the piston rod 16 is raised to the maximum height, the C-shaped buckle 19 will abut against the oil seal assembly 13, in other words, the position of the C-type buckle 19 disposed on the piston rod 16 determines the maximum height or maximum displacement of the piston rod 16.

3 and FIG. 4 are schematic views of the lifting device 1 of the present invention in a first operating state. The first operating state of the embodiment causes the piston rod 16 and the seat cushion of the user to descend, wherein FIG. 3 shows the oil body. In the case of flow, Figure 4 shows the flow of gas.

As shown in FIG. 3, when the occupant on the bicycle seat is to lower the seat cushion, the occupant will operate a control device (not shown) for actuating the lever 18, and the actuating lever 18 pushes the piston pin 17 so that One of the piston pins 17 is moved upward, and one of the inclined portions 172 and a small diameter portion 173 of the piston pin 17 forms a gap (channel) with the control valve 142, and the size of the air hole AH is smaller than the piston pin 17 in the operating state. The size of the gap between the lower and control components 14. Here, the slope portion 172 is a portion having an annular slope, and the small diameter portion 173 is a portion having a smaller diameter than the other portions. For example, the outer diameter of one of the small diameter portions 173 is smaller than the outer diameter of the sealing portion 171. The inclined surface portion 172 is provided between the sealing portion 171 and the small diameter portion 173, and the inclined surface portion 172 of the present embodiment is connected to the small diameter portion 173. At this time, the occupant continues to apply force to the seat cushion with the buttocks, and the piston rod 16 descends, and the oil body O of the inner tube 12 flows to the outer tube 11 through the gap and the oil hole OH. Until the occupant releases the control device, the sealing portion 171 of the piston pin 17 is closed again, and the piston rod 16 is positioned at a height.

As shown in FIG. 4, in the same operation state as that of FIG. 3, the gas in the accommodation space AS flows to the air chamber AR of the inner tube 12 through one of the pores AH of the Palin 133.

5 and FIG. 6 are schematic views of the lifting device 1 of the present invention in a second operating state. The second operating state of the embodiment causes the piston rod 16 and the user's seat cushion to rise, wherein FIG. 5 shows the oil body. In the case of flow, Figure 6 shows the flow of gas.

As shown in FIG. 5, when the occupant on the bicycle seat is to raise the seat cushion, the occupant will operate a control device (not shown) for actuating the lever 18, and the actuating lever 18 pushes the piston pin 17 so that One of the piston pins 17 is moved upward, and one of the inclined portions 172 and one of the small diameter portions 173 of the piston pin 17 forms a gap with the control valve 142. At this time, the buttocks of the occupant are separated from the seat cushion, and the piston rod 16 is raised, and the oil body O in the accommodating space AS flows to the oil chamber OR of the inner tube 12 through the gap and the oil hole OH. Until the occupant releases the control device, the sealing portion 171 of the piston pin 17 is closed again, and the piston rod 16 is positioned at a height.

As shown in FIG. 6, in the same operation state as that of FIG. 5, the gas system in the gas chamber AR flows to the accommodating space AS between the outer tube 11 and the inner tube 12 via one of the pores AH of the lining 133. .

Fig. 7 is a schematic view of a lifting device 1a according to another embodiment of the present invention. As shown in FIG. 7, the lifting device 1a further includes a floating piston 103 disposed inside the accommodating space AS. The floating piston 103 divides the accommodating space AS into a gas accommodating space and an oil body accommodating space. Here, the upper portion of the floating piston 103 is a gas accommodating space, and the lower portion of the floating piston 103 is an oil body accommodating space. The gas accommodating space can be regarded as another air chamber other than the air chamber AR, and the oil body accommodating space can be regarded as another oil chamber other than the oil chamber OR. The generation of air bubbles or air due to oil and gas mixing may render the piston rod 16 unable to stand still (the occupant on the seat cushion may feel a slight up and down vibration). In this embodiment, the arrangement of the floating piston 103 can avoid mixing of the gas and the oil body, thereby avoiding the above problem.

Fig. 8 is a schematic view of a lifting device 1b according to another embodiment of the present invention. As shown in FIG. 8, the lifting device 1b may further include a stopper 104 which is disposed between the C-shaped buckle 19 and the piston 15. In the present embodiment, the stopper 104 is made of a material having minute air holes but not absorbing oil. The purpose of the stop member 104 is to prevent the user from turning the item of the case upside down (some users will test the product before installation, that is, the product is inverted, the actuating rod 18 is facing upward, and the piston rod 16 is facing downward to contact the ground or the table top, Then, the actuating lever 18 is manually operated, and the piston rod 16 is pressed down, so that the oil body flows into the air chamber AR of the inner tube 12. By the arrangement of the stopping member 104, the amount of the oil body entering the air chamber AR can be reduced. It can facilitate the discharge of the oil body outside the air chamber AR. However, when the user installs correctly and operates correctly, the piston rod 16 can be raised to cause the oil body in the air chamber AR to flow again to the accommodating space AS (because the oil body is heavier than the gas).

As described above, in the lifting device of the present invention, the space of the air chamber can be increased by the arrangement of the inner tube and the outer tube, so that when the piston rod rises, the gas flows from the inner tube to the outer tube, and the internal pressure value does not change much. Therefore, the force applied to lower the piston rod can be relatively small (that is, the occupant on the seat cushion has a small force to press down). In addition, with the arrangement of the inner tube and the outer tube of the present invention, the height of the lifting device of the present invention can be reduced under the same moving stroke with the conventional piston rod, so that the novel device can be mounted on the frame. There is more space to be used (for example, a motor is provided to act as a moving rod); in addition, the height of the lifting device of the present invention can be increased in the case where it is necessary to increase the moving stroke of the piston rod, and still conform to the size of the general frame. .

In addition, by providing a gas hole in the oil seal assembly, and the size of the air hole is smaller than the size of the gap (channel) of the piston pin in the operating state and the control unit, and is smaller than the size of the oil hole of the control unit, the gap can be avoided. Oil hole In the general design, when the oil flows, the gas is brought into the oil chamber (in the embodiment without the floating piston), so that the piston rod can be surely rendered stationary (the occupant on the seat cushion does not It will feel a slight up and down vibration. If there is gas running into the oil chamber, the gas can be compressed because the gas can be compressed. The occupant on the seat cushion will feel a slight up and down vibration. With the above arrangement of the present invention, the performance of the lifting device can be improved. The lifting device of the present invention can be applied to any suitable field, for example, for a bicycle seat lifting mechanism, but the present invention is not limited thereto.

In addition, the piston pin of the lifting device of the present invention has an annular bevel, and an oil body can flow between the oil chamber and the accommodating space via the annular bevel. 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 lifting device.

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, 1a, 1b‧‧‧ lifting device

101‧‧‧O-ring

102‧‧‧shims

103‧‧‧Floating piston

104‧‧‧stops

11‧‧‧External management

12‧‧‧Inside

13‧‧‧ Oil seal assembly

131‧‧‧oil seal seat

132‧‧‧ oil seal

133‧‧ ‧ Palin

14‧‧‧Control components

141‧‧‧ Mounting

142‧‧‧Control valve

15‧‧‧Piston

16‧‧‧ piston rod

17‧‧‧Piston pin

171‧‧‧ Sealing Department

172‧‧‧Bevel

173‧‧‧Little Trails Department

18‧‧‧Action rod

19‧‧‧C buckle

AH‧‧ stom

AR‧‧‧ air chamber

AS‧‧‧ accommodating space

O‧‧‧ oil body

OH‧‧‧ oil hole

OR‧‧‧ oil room

Figure 1 is a combination of one of the lifting devices of the preferred embodiment of the present invention.

2 is a schematic cross-sectional view of a lifting device in accordance with a preferred embodiment of the present invention.

3 and 4 are schematic views of the lifting device of the present invention in a first operational state.

5 and 6 are schematic views of the lifting device of the present invention in a second operational state.

Fig. 7 is a schematic view of a lifting device according to another embodiment of the present invention.

Figure 8 is a schematic view of a lifting device according to another embodiment of the present invention.

1‧‧‧ lifting device

101‧‧‧O-ring

102‧‧‧shims

11‧‧‧External management

12‧‧‧Inside

13‧‧‧ Oil seal assembly

131‧‧‧oil seal seat

132‧‧‧ oil seal

133‧‧ ‧ Palin

14‧‧‧Control components

141‧‧‧ Mounting

142‧‧‧Control valve

15‧‧‧Piston

16‧‧‧ piston rod

17‧‧‧Piston pin

171‧‧‧ Sealing Department

18‧‧‧Action rod

19‧‧‧C buckle

AH‧‧ stom

AR‧‧‧ air chamber

AS‧‧‧ accommodating space

O‧‧‧ oil body

OH‧‧‧ oil hole

OR‧‧‧ oil room

Claims (10)

A lifting device comprising: an outer tube; an inner tube disposed in the outer tube, and an accommodating space formed between the outer tube and the inner tube; an oil seal assembly disposed at one end of the outer tube; a control assembly disposed at the other end of the outer tube; a piston disposed in the inner tube; a piston rod penetrating the oil seal assembly and the piston; and a piston pin penetrating the control assembly, wherein the control assembly An oil chamber is formed between the control assembly and the piston, and communicates with the accommodating space in at least one operating state, and an air chamber is formed between the oil seal assembly and the piston, and is accommodated in the operating state. The air bearing unit has an oil hole communicating with the accommodating space, and the oil seal assembly has an air hole communicating with the accommodating space, and the air hole is smaller in size than the piston pin in the operating state and the control component One of the gaps is smaller in size and smaller than the size of the oil hole. The lifting device of claim 1, further comprising: a C-shaped buckle embedded in the piston rod and located between the oil seal assembly and the piston. The lifting device of claim 2, further comprising: a stopping member disposed between the C-shaped buckle and the piston. The lifting device of claim 3, wherein the blocking member is made of a material having minute air holes but not absorbing oil. The lifting device of claim 1, further comprising: a floating piston disposed in the accommodating space. The lifting device of claim 1, wherein the oil seal assembly comprises an oil seal seat, an oil seal and a lining, the oil seal seat abuts against the outer tube, the lining abuts the inner tube, the oil seal is set Between the oil seal seat and the Palin. The lifting device of claim 6, wherein the air hole is disposed in the Palin. The lifting device of claim 1, wherein the control component comprises a mounting seat and a control valve, the mounting seat abuts the outer tube, and the control valve abuts against the inner tube and is connected to the mounting seat. The lifting device of claim 8, wherein the piston pin has the gap between the operating valve and the control valve of the control assembly. The lifting device of claim 1, wherein the piston pin comprises a sealing portion, a slope portion and a small diameter portion, wherein an outer diameter of one of the small diameter portions is smaller than an outer diameter of the sealing portion, and The inclined surface portion is disposed between the sealing portion and the small diameter portion.