Bicycle lifting seat tube

Abstract

The utility model relates to the technical field of bicycles, and discloses a bicycle lifting seat tube which comprises an inner tube, an outer tube is arranged outside the inner tube, an oil seal is arranged at the upper end of the outer tube, a groove is formed in the head of the inner tube, a seat cushion mounting clamp is mounted at the uppermost end of the inner tube, an oil pressure system is mounted in the inner tube, and the oil pressure system is connected with the inner tube. One end of the oil hydraulic system is provided with a hydraulic cylinder, the other end of the oil hydraulic system is provided with a tail plug, four through axial grooves are formed in the outer pipe, four containing grooves are formed in the four corners of the surface of the inner pipe, guide columns are embedded in the containing grooves, and the end of the outer pipe is provided with a one-way bearing. According to the bicycle lifting seat tube, the clearance caused by the tolerance of the guide post is eliminated through the one-way bearing and the guide post. And meanwhile, the machining requirement of a groove matched with a guide column is lowered, and the problem that a shaking gap must exist due to the limitation of machining tolerance when the head rotating angle of an existing bicycle lifting seat tube is positioned and fixed through the guide column is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a bicycle lifting seat tube. Background Art

[0002] Bicycling is becoming an increasingly popular form of recreation and transportation. In addition, bicycling has become a very popular competitive sport for both amateurs and professionals. Whether the bicycle is used for recreation, transportation, or competition, the bicycle industry continues to improve the various components of the bicycle. One bicycle component that has been extensively redesigned is the bicycle seat tube assembly, which is the connecting member used to connect the bicycle seat to the frame.

[0003] According to the application number 202321834505.9, a bicycle lifting seat tube is disclosed, including a seat cushion connector, a seat tube head, an outer tube and a lifting assembly, wherein the lifting assembly includes a gas pressure rod and a motor, wherein the gas pressure rod is invertedly sleeved in the outer tube, and the motor is installed at the lower end of the outer tube, and its output end is connected to the piston end of the gas pressure rod, and the cylinder end of the gas pressure rod is connected to the seat cushion connector through the seat tube head. The motor is used to drive the inverted gas pressure rod piston end to extend and retract, so that it moves along the outer tube, thereby driving the seat tube head to rise and fall, without the need for manual lifting of the seat cushion, and avoiding the use of hydraulic lifting, the lifting structure is more concise and flexible, and the parts cost is low, with excellent application effect.

[0004] The following problems still exist in actual use:

[0005] The existing bicycle dropper seat post uses a guide post to position and fix the rotation angle of the head. Due to the limitation of processing tolerance, there will inevitably be a shaking gap. Therefore, a bicycle dropper seat post is introduced, which uses a one-way bearing plus a guide post to eliminate the gap caused by the guide post tolerance, while reducing the groove processing requirements for the guide post, thereby reducing costs and significantly increasing the output per unit time. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a bicycle lifting seat post, which adopts a one-way bearing plus a guide post to eliminate the gap caused by the guide post's working tolerance, while reducing the requirements for groove processing that cooperates with the guide post, thereby reducing costs and significantly increasing production per unit time, thereby solving the problems raised in the background technology.

[0007] The present utility model provides the following technical solution: A bicycle lift seat tube, including an inner tube, an outer tube is disposed outside the inner tube, an oil seal is disposed at the upper end of the outer tube, a handle is installed at the head of the inner tube, a mounting seat cushion clamp is installed at the uppermost end of the inner tube, an oil pressure system is installed inside the inner tube, a tail plug is installed at the other end of the oil pressure system, the inside of the outer tube is provided with four axial grooves penetrating through, four grooves are respectively opened at the four corners of the surface of the inner tube, and guide posts are inlaid in the grooves, a one-way bearing is installed at the end of the outer tube, and the needle rollers of the one-way bearing are in contact with the inner tube.

[0008] Preferably, the outer tube is rotationally connected to the inner tube through a one-way bearing and a guide post, the oil seal is fixedly connected to the upper end of the outer tube, and the mounting seat cushion clamp is fixedly connected to the uppermost end of the inner tube.

[0009] Preferably, a pin is installed at the head of the inner tube, and the handle is installed at the head of the inner tube through the pin.

[0010] Preferably, a tail plug is installed at the other end of the oil pressure system, and the other end of the oil pressure system is connected to the outer tube through the tail plug.

[0011] Preferably, the guide posts are circumferentially distributed at the four corners of the surface of the inner tube.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] 1. For this bicycle lift seat tube, the clearance caused by the guide post tolerance is eliminated by the method of combining a one-way bearing and a guide post. At the same time, the processing requirements for the grooves matching with the guide posts are reduced, the cost is reduced, and the output per unit time is increased significantly. It solves the problem that the existing bicycle lift seat tube uses a guide post to position and fix the rotation angle of the head, and there must be a shaking clearance due to the limitation of processing tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a device of a bicycle lift seat tube provided by the present utility model;

[0015] Figure 2 It is a cross-sectional structural schematic diagram of a bicycle lift seat tube provided by the present utility model;

[0016] Figure 3 It is a structural schematic diagram of a guide post of a bicycle lift seat tube provided by the present utility model.

[0017] In the figure: 1. Inner tube; 2. Outer tube; 3. Oil seal; 4. Handle; 5. Mounting seat cushion clamp; 6. Pin; 7. Oil pressure system; 8. Tail plug; 9. Guide post; 10. One-way bearing. DETAILED DESCRIPTION OF THE INVENTION

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1 to 3 , a bicycle seat post with lifting function, comprising an inner tube 1, an outer tube 2 is arranged outside the inner tube 1, an oil seal 3 is arranged at the upper end of the outer tube 2, a handle 4 is installed at the head of the inner tube 1, a seat clamp 5 is installed at the uppermost end of the inner tube 1, an oil pressure system 7 is installed inside the inner tube 1, a tail plug 8 is installed at the other end of the oil pressure system 7, four axial grooves are formed inside the outer tube 2, four grooves are respectively formed at the four corners of the surface of the inner tube 1, and guide posts 9 are embedded in the grooves, a one-way bearing 10 is installed at the end of the outer tube 2, and the needle rollers of the one-way bearing 10 are in contact with the inner tube 1;

[0020] The guide posts 9 embedded on the inner tube 1 cooperate with the grooves inside the outer tube 2 to control the relative rotation angle between the inner tube 1 and the outer tube 2 within a certain range. The inner tube 1 can slide axially along the outer tube 2. A one-way bearing 10 is installed at the upper end of the outer tube 2, and the inner tube 1 is in contact with the needle rollers of the one-way bearing 10 and can slide axially along the one-way bearing 10.

[0021] Please refer to Figures 1 to 3 , the outer tube 2 is rotationally connected to the inner tube 1 through the one-way bearing 10 and the guide posts 9, the oil seal 3 is fixedly connected to the upper end of the outer tube 2, the seat clamp 5 is fixedly connected to the uppermost end of the inner tube 1, and the guide posts 9 are circumferentially distributed at the four corners of the surface of the inner tube 1;

[0022] When the inner tube 1 rotates within the angle defined inside the outer tube 2, the inner tube 1 will drive the needle rollers of the one-way bearing 10 to rotate. Due to the characteristic of the one-way bearing 10 that it can only rotate in one direction, when it rotates to the limit where the guide posts 9 cooperate with the grooves inside the outer tube 2, since the one-way bearing 10 and the guide posts 9 respectively define a direction, at this time, the relative rotation between the inner tube 1 and the outer tube 2 is completely eliminated, and the clearance caused by the tolerance of the guide posts 9 is eliminated by using the method of the one-way bearing 10 plus the guide posts 9.

[0023] Please refer to Figures 1 to 2 , a pin 6 is installed at the head of the inner tube 1, the handle 4 is installed at the head of the inner tube 1 through the pin 6, the other end of the oil pressure system 7 is installed with a tail plug 8, and the other end of the oil pressure system 7 is connected to the outer tube 2 through the tail plug 8;

[0024] Inside the inner tube 1, there is an oil pressure system 7 for controlling lifting. The other end of the oil pressure system 7 is connected to the outer tube 2 through a tail plug 8. At the same time, an oil seal 3 is installed at the upper end of the outer tube 2. A handle 4 is installed at the head of the inner tube 1 through a pin 6. The handle 4 can operate the switch of the oil pressure system 7 to control the lifting. A seat cushion fixture 5 is installed at the uppermost end of the inner tube 1 for installing the seat cushion.

[0025] In the present utility model, the working principle of the device is as follows:

[0026] The device consists of an outer tube 2 with four axially penetrating grooves inside, and an inner tube 1 integrally forged and inserted inside. The inner tube 1 has four grooves, and guide posts 9 are inlaid in the grooves. The guide posts 9 inlaid on the inner tube 1 cooperate with the grooves inside the outer tube 2 to control the relative rotation angle between the inner tube 1 and the outer tube 2 within a certain range. The inner tube 1 can slide axially along the outer tube 2. A one-way bearing 10 is installed at the upper end of the outer tube 2. The inner tube 1 contacts the needle rollers of the one-way bearing 10 and can slide axially along the one-way bearing 10. When the inner tube 1 rotates within the angle defined inside the outer tube 2, the inner tube 1 will drive the needle rollers of the one-way bearing 10 to rotate. Due to the characteristic of the one-way bearing 10 that it can only rotate in one direction, when it rotates to the limit where the guide post 9 cooperates with the inner groove of the outer tube 2, because the one-way bearing 10 and the guide post 9 each define a direction, at this time, the relative rotation between the inner tube 1 and the outer tube 2 is completely eliminated. The method of using the one-way bearing 10 plus the guide post 9 eliminates the clearance caused by the manufacturing tolerance of the guide post 9, and at the same time reduces the processing requirements for the grooves cooperating with the guide post 9, reduces the cost, and greatly increases the output per unit time.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A bicycle dropper seat tube, comprising an inner tube (1), characterized in that: An outer tube (2) is arranged outside the inner tube (1), an oil seal (3) is arranged at the upper end of the outer tube (2), a handle (4) is installed at the head of the inner tube (1), a seat cushion fixture (5) is installed at the uppermost end of the inner tube (1), an oil pressure system (7) is installed inside the inner tube (1), and a tail plug (8) is installed at the other end of the oil pressure system (7), the inner part of the outer tube (2) has four through axial grooves, four grooves are opened at the four corners of the surface of the inner tube (1), and guide columns (9) are embedded in the grooves, and a one-way bearing (10) is installed at the end of the outer tube (2), and the roller needle of the one-way bearing (10) contacts the inner tube (1).

2. A bicycle dropper seat post according to claim 1, characterized in that: The outer tube (2) is rotatably connected to the inner tube (1) via a one-way bearing (10) and a guide column (9); the oil seal (3) is fixedly connected to the upper end of the outer tube (2); and the mounting seat cushion fixture (5) is fixedly connected to the uppermost end of the inner tube (1).

3. The bicycle dropper seat post according to claim 1, characterized in that: The head of the inner tube (1) is mounted with a pin (6), and the head of the inner tube (1) is mounted with a handle (4) via the pin (6).

4. The bicycle dropper seat post according to claim 1, characterized in that: The other end of the oil pressure system (7) is installed with a tail plug (8), and the other end of the oil pressure system (7) is connected to the outer tube (2) through the tail plug (8).

5. The bicycle dropper seat post according to claim 1, characterized in that: The guide pillars (9) are circumferentially distributed at the four corners of the surface of the inner tube (1).

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