TWM525881U - Locking device of bicycle seat tube - Google Patents

Description

Bicycle seat tube locking device

The present invention relates to a bicycle seat tube locking device, and more particularly to a bicycle seat tube locking device that can be quickly assembled and disassembled to replace components inside the bicycle seat tube.

The bicycle seat tube is generally installed under the bicycle seat cushion for connecting with the bicycle seat cushion, and the ride height of the bicycle seat cushion is adjusted by the expansion and contraction of the bicycle seat tube. The general bicycle seat tube is easy to adjust the height of the bicycle seat cushion by accommodating an auxiliary telescopic unit such as a gas bar or a hydraulic rod inside.

As shown in FIG. 4, the bicycle seat tube 90 of the prior art has a seat tube 91, a lower seat tube 92, an auxiliary telescopic unit 93, and a connecting device 94. The upper seat tube 91 is inserted at the top of the lower seat tube 92. The inner edge, and the auxiliary expansion unit 93 such as a gas pressure bar or a hydraulic pressure bar is accommodated inside the upper seat tube 91 and the lower seat tube 92, and assists the upper seat tube 91 with respect to the lower seat tube by the operation of the auxiliary expansion unit 93. 92 telescopic movement, thereby achieving the effect of adjusting the length of the overall bicycle seat tube 90, and when the top of the upper seat tube 91 is fitted with the bicycle seat cushion through the connecting device 94, the bicycle seat cushion can be extended by the upper seat tube 91 or Shorten the height position of the bicycle seat cushion.

However, as shown in FIG. 4, although the top of the upper seat tube 91 has an opening 911, a closing member 100 is fixed at the opening 911 to prevent the auxiliary telescopic unit 93 inside the upper seat tube 91 from communicating with the outside; and the opening The size of the 911 is significantly smaller than that of the auxiliary telescopic unit 93. Therefore, when the auxiliary telescopic unit 93 is damaged, the bicycle technician must disassemble and disassemble the upper seat tube 91 and the lower seat tube 92 before the auxiliary telescopic unit 93 can be taken out for repair or Displacement, which is quite time consuming and inconvenient for bicycle maintenance work.

The purpose of the present invention is to improve the problem that the auxiliary telescopic unit in the bicycle seat tube of the prior art is not easy to repair or replace. The implementation of the creative technology means that the auxiliary telescopic unit in the bicycle seat tube can be easily and easily taken out, and is effective. Reduce the waste of mechanical structure disassembly during maintenance.

In order to achieve the above-mentioned creative purposes, the technical means adopted by the present invention is to provide a locking device for a bicycle seat tube, comprising: a fixing seat, the fixing seat is provided with an assembly passage; and an upper seat tube, one end of the upper seat tube Inserted in the assembly channel of the fixing seat, the inner edge of the assembly channel is tightly fixed to the outer edge of the upper seat tube; the upper seat tube has a first joint portion and a receiving space, and the first joint portion is disposed at The upper seat tube is opposite to the inner edge of the end of the fixed seat, and the receiving space is formed inside the upper seat tube; a first joint member is in the shape of a cap; the first joint member has a cover portion and a column a plug portion and a bottom portion; the cover portion is disposed on a side of the assembly passage of the fixing seat facing away from the upper seat tube; the outer peripheral edge of the plunger portion is provided with a second joint portion, and the position and structure of the second joint portion Corresponding to the first joint portion of the upper seat tube; the bottom portion is recessed with a groove, the inner edge of the groove is provided with a third joint portion; and a second joint member is mounted on the first joint member To the side of the upper seat tube, And the second engaging member is received in the receiving space of the upper seat tube; the second engaging member has a base and a protruding portion extending from a top side of the base toward a groove of the first engaging member Projecting, and the outer periphery of the protrusion is provided with a fourth joint portion, the position and structure of the fourth joint portion respectively corresponding to the third joint portion of the first joint member.

An advantage of the present invention is that the first joint portion of the upper seat tube is disposed corresponding to the second joint portion of the first joint member, and the fourth joint portion of the first joint member and the fourth joint portion of the second joint member Correspondingly, the first engaging member and the second engaging member are detached from the upper seat tube, and then the receiving space of the upper seat tube is opened through the assembly passage of the fixing seat, thereby allowing the receiving portion to be placed The auxiliary telescopic unit inside the space of the upper seat tube, such as a gas pressure rod or a hydraulic pressure rod, can be quickly taken out from the top of the upper seat tube without disassembling the entire bicycle seat tube, thereby effectively saving the auxiliary expansion and contraction inside the accommodation space of the upper seat tube. Unit repair and replacement work time.

Preferably, the first engaging portion of the upper seat tube is a first internal thread, the second engaging portion of the first engaging member is a first external thread, and the first internal thread and the first external thread are mutually The third engaging portion of the groove of the first engaging member is a second internal thread, and the fourth engaging portion of the protruding portion of the second engaging member is a second external thread, the second internal thread And the second external thread is screwed together. The technical means utilizes the corresponding arrangement of the first internal thread and the first external thread, so that the upper seat tube can be screwed and fixed relative to the first joint member, and the upper seat tube and the first joint member are effectively improved. The problem of looseness caused by the vibration of the car. The first engaging member can be screwed and fixed relative to the second engaging member to adjust the first engaging member and the second engaging member by using a corresponding arrangement of the second internal thread and the second external thread. The stability of the mutual fixation.

More preferably, the cover portion of the first engaging member is provided with a hexagonal hole. The technical means utilizes the arrangement of the hexagonal holes, so that the user can assist the rotation of the first joint member relative to the upper seat tube by using the hexagonal wrench of the prior art, thereby improving the convenience of the disassembling operation.

Still more preferably, the diameter of the cover portion of the first engaging member is larger than the diameter of the assembly passage of the fixed seat. The technical means is that the diameter of the cover portion of the first joint member is larger than the diameter of the assembly passage of the fixed seat, so that the assembly passage of the fixed seat and the accommodation space of the upper seat tube can be used by the first joint member. The cover portion is tightly closed, thereby increasing the operating efficiency of the air pressure or oil pressure of the auxiliary telescopic unit in the accommodation space of the upper seat tube.

Preferably, the locking device of the bicycle seat tube further has a coupling assembly; the coupling assembly is mounted on a side of the fixing seat facing away from the upper seat tube, and the coupling assembly has a first mounting block and a a second mounting block; the first mounting block is detachably connected to the fixing seat, and the second mounting block is clamped between the first mounting block and the fixing seat.

More preferably, the fixing base has two joint portions, and the two joint portions respectively protrude radially from opposite sides of the assembly passage, and a uniform hole is respectively formed in the axial direction of the two joint portions; The first mounting block is provided with a through hole, and the second mounting block is recessed with a two-way slot. The through hole of the first mounting block and the through slot of the second mounting block correspond to the position of the through hole of the joint portion. The coupling assembly further has two screws and two nuts, and the two nuts are respectively received in the two through holes of the first mounting block, and the two screws respectively penetrate the through holes of the joint portion and the through hole The through slot of the second mounting block is screwed to the nut inside the through hole of the first mounting block. The technical means utilizes the arrangement of the combined component, so that the fixing seat of the present invention can be further coupled with the bicycle seat cushion, and the bicycle seat cushion is moved up and down by the expansion and contraction movement of the upper seat tube to adjust the height of the bicycle seat cushion. The effect.

More preferably, a cushion is provided between each of the screws and each of the nuts. The technical means is that the joint between the first mounting block, the second mounting block or the fixing seat is damaged by the screw or the screw because the screw and the nut are provided with the cushioning pad between the screw and the nut to prevent the screw and the nut from being tightly locked. The compression of the cap and the damage occurred.

In the following, please cooperate with the drawings and the preferred embodiment of the present invention to further explain the technical means adopted by the present creation for the purpose of achieving the intended creation.

As shown in FIG. 1 and FIG. 2, the locking device for the bicycle seat tube of the present invention comprises: a fixing base 10, a seat tube 20, a first engaging member 30, a second engaging member 40, and a coupling assembly 50.

In addition, as shown in FIG. 3, an assembly passage 11 is disposed at the center of the fixing base 10 in the axial direction. The assembly passage 11 is provided for the fixing of the upper seat tube 20, and the first joint member 30 is also provided. The second engaging member 40 is used. The fixing base 10 further has two joint portions 12 respectively protruding from the opposite sides of the assembly passage 11 and extending in a direction, and the extending direction of the two joint portions 12 and the extension of the assembly passage 11 The direction is vertically disposed; the two joint portions 12 are respectively axially provided with a constant hole 121.

The top end of the upper seat tube 20 is inserted into the assembly passage 11 of the fixing base 10, and the inner edge of the assembly passage 11 and the outer edge of the upper seat tube 20 are pressed together to fix the fixing base 10 and the upper seat tube 20. . The first seat portion 20 is provided with a first joint portion 21 and a receiving space 22, the first joint portion 21 is disposed at a top inner edge of the upper seat tube 20, and the first joint portion 21 is a first internal thread; The receiving space 22 is formed inside the upper seat tube 20, and the receiving space 22 communicates with the assembling passage 11 of the fixing base 10.

The first engaging member 30 has a cap shape and has a cover portion 31, a plunger portion 32 and a bottom portion 33. The cover portion 31 is disposed on the top side of the assembly passage 11 of the fixing base 10, and the diameter D of the cover portion 31 is larger than the diameter d of the assembly passage 11, so that the top side of the assembly passage 11 is selectively the first The cover portion 31 of the engaging member 30 is closed; the outer peripheral edge of the plunger portion 32 is provided with a second engaging portion 321 , the second engaging portion 321 is a first external thread, and the second engaging member 30 is second. The first external thread of the engaging portion 321 and the first internal thread of the first engaging portion 21 of the upper seat tube 20 correspond to each other in position and structure, so that the upper seat tube 20 and the first engaging member 30 can be mutually rotated by relative rotation. The screw is fixed and the plunger portion 32 and the bottom portion 33 of the first engaging member 30 are screwed into the receiving space 22 of the upper seat tube 20; and the bottom portion 33 is recessed with a recess 331. The bottom portion 33 of the first engaging member 30 is recessed toward the cover portion 31, and the inner edge of the recess 331 is further provided with a third engaging portion 332, which is a second internal thread.

In addition, the cover portion 31 of the first joint member 30 is further provided with a hexagonal hole 34, and the shape of the hexagonal hole 34 corresponds to the cross-sectional shape of the prior art hexagonal wrench, thereby facilitating the user to utilize the prior art. The hexagonal wrench easily disassembles or assembles the first engaging member 30.

The second engaging member 40 is disposed on the bottom side of the first engaging member 30. The second engaging member 40 has a base 41 and a protruding portion 42. The protruding portion 42 is directed from the top side of the base 41 toward the first side. The direction of the engaging member 30 is extended, and the protruding portion 42 corresponds to the shape and position of the groove 331 of the first engaging member 30. The outer peripheral edge of the protruding portion 42 is further provided with a fourth engaging portion 421, the fourth engaging portion 421 is a second external thread, and the second external thread of the fourth engaging portion 421 of the second engaging member 40 is the same as the foregoing The second internal thread of the third engaging portion 332 of the engaging member 30 has a position and a structure corresponding to each other, so that the first engaging member 30 and the second engaging member 40 can be screwed and fixed to each other by relative rotation, and the first The two engaging members 40 are fixed in the receiving space 22 of the upper seat tube 20 by the screwing and fixing of the upper seat tube 20 and the first engaging member 30, so that the second engaging member 40 can be placed downwardly. An auxiliary telescopic unit such as a gas pressure rod or a hydraulic rod (not shown) in the accommodation space 22 of the upper seat tube 20 is provided to assist the expansion and contraction of the upper seat tube 20.

The coupling assembly 50 is mounted on the top side of the fixing base 10 and includes a first mounting block 51 , a second mounting block 52 , two nuts 53 , two screws 54 , and two buffer pads 55 . The first mounting block 51 is axially disposed with a two-way hole 511, and the second mounting block 52 is recessed inwardly in a direction parallel to the extending direction of the joint portion 12 of the first mounting block 51 and the fixing base 10. 521. The through hole 511 of the first mounting block 51 and the through slot 521 of the second mounting block 52 are disposed corresponding to the position of the through hole 121 of the joint portion 12 of the fixing base 10. The two nuts 53 are respectively disposed in the two through holes 511 of the first mounting block 51. The two screws 54 are sequentially inserted through the through holes 121 of the joint portion 12 of the fixing base 10 and the through holes. The through hole 521 of the second mounting block 52 is further screwed and fixed to the nut 53 inside the through hole 511 of the first mounting block 51, thereby connecting the first mounting block 51 to the top of the fixing base 10. The second mounting block 52 is sandwiched between the first mounting block 51 and the fixing base 10.

In addition, a buffer pad 55 is further disposed between each of the screws 54 and the nuts 53 to prevent the first mounting block 51 and the second between the screws 54 and the nut 53 due to mutual locking and tightening. The structural block 52 or the joint 12 of the mount 10 is structurally damaged.

When the present assembly is assembled, an auxiliary telescopic unit such as a gas pressure bar or a hydraulic bar is first placed in the receiving space 22 of the upper seat tube 20, and the first engaging member 30 and the second engaging member 40 are screwed together. Fixing, then inserting the second engaging member 40 into the assembling passage 11 of the fixing base 10, and further screwing the second engaging member 40 into the upper seat by the relative rotation of the first engaging member 30 and the upper seat tube 20 The receiving space 22 of the tube 20, and abutting the auxiliary telescopic unit downward, while the first engaging member 30 and the upper seat tube 20 are coupled to each other, and the receiving space 22 of the upper seat tube 20 and the fixing seat The assembly passage 11 of the first engagement member 30 is closed by the cover portion 31 of the first engagement member 30, and finally the coupling assembly 50 is mounted on the top side of the fixed base 10 to complete the locking structure of the bicycle seat tube of the present invention. installation.

When the present invention is to be disassembled, the binding assembly 50 is first detached from the fixing base 10, and then a hexagonal wrench is inserted into the hexagonal hole 34 of the first engaging member 30 by rotating the hexagonal wrench. The first engaging member 30 is rotated relative to the upper seat tube 20, and the first engaging member 30 is gradually disassembled from the upper seat tube 20. Then, the first engaging member 30 and the second engaging member 40 are taken out from the receiving space 22 of the upper seat tube 20 and the assembling passage 11 of the fixing base 10, so that the receiving space 22 of the upper seat tube 20 and the fixing seat The assembly passage 11 of the 10 is in an open state, that is, the auxiliary telescopic unit accommodated in the accommodation space 22 of the upper seat tube 20 can be easily taken out for replacement work.

In summary, the locking structure of the bicycle seat tube of the present invention is effectively improved by the screwing and locking arrangement between the upper seat tube 20 and the first joint member 30 and between the first joint member 30 and the second joint member 40. The loosening between the closing member of the upper seat tube 20 and the upper seat tube 20 due to the running vibration, and the top end of the receiving space 22 of the upper seat tube 20 and the assembly passage 11 of the fixed seat 10 can be opened or closed easily and quickly. Therefore, the maintenance personnel can conveniently carry out the components inside the accommodation space 22 of the upper seat tube 20, such as: the extraction and replacement of the auxiliary telescopic unit, thereby effectively saving the maintenance time of disassembling the bicycle seat tube and replacing the auxiliary expansion unit therein, thereby improving the maintenance operation. effectiveness.

10‧‧‧ Fixed seat
11‧‧‧Assemble channel
12‧‧‧Combination Department
121‧‧‧through holes
20, 91‧‧‧ seat tube
21‧‧‧First joint
22‧‧‧ Included space
30‧‧‧First joint
31‧‧‧ 盖部
32‧‧‧Plunger
321‧‧‧Second joint
33‧‧‧ bottom
331‧‧‧ Groove
332‧‧‧ third joint
34‧‧‧Hexagonal holes
40‧‧‧Second joint parts
41‧‧‧Base
42‧‧‧Protruding
421‧‧‧four joints
50‧‧‧Combined components
51‧‧‧First installation block
511‧‧‧through hole
52‧‧‧Second installation block
521‧‧‧through slot
53‧‧‧ nuts
54‧‧‧ screws
55‧‧‧Vacuum gasket
90‧‧‧ bicycle seat tube
911‧‧‧ openings
92‧‧‧Lower tube
93‧‧‧Auxiliary telescopic unit
94‧‧‧Connecting device
100‧‧‧Closed components

Figure 1 is a perspective view of the locking device of the bicycle seat tube of the present invention. 2 is an exploded perspective view of the locking device of the bicycle seat tube of the present invention. Figure 3 is an enlarged side elevational cross-sectional view of the locking device of the bicycle seat tube of the present invention. 4 is a side elevation, partial cross-sectional view of a prior art bicycle seat tube.

10‧‧‧ Fixed seat

11‧‧‧Assemble channel

12‧‧‧Combination Department

121‧‧‧through holes

20‧‧‧Seat tube

22‧‧‧ Included space

30‧‧‧First joint

31‧‧‧ 盖部

32‧‧‧Plunger

321‧‧‧Second joint

33‧‧‧ bottom

34‧‧‧Hexagonal holes

40‧‧‧Second joint parts

41‧‧‧Base

42‧‧‧Protruding

421‧‧‧four joints

50‧‧‧Combined components

51‧‧‧First installation block

511‧‧‧through hole

52‧‧‧Second installation block

521‧‧‧through slot

53‧‧‧ nuts

54‧‧‧ screws

55‧‧‧Vacuum gasket

Claims (8)

A locking device for a bicycle seat tube, comprising: a fixing seat, the fixing seat is provided with an assembly passage; an upper seat tube, one end of the upper seat tube is inserted into the assembly passage of the fixing seat, and the inside of the assembly passage The edge is tightly fixed to the outer edge of the upper seat tube; the upper seat tube has a first joint portion and a receiving space, and the first joint portion is disposed at an inner edge of the end of the upper seat tube facing the fixed seat, and the receiving portion is provided a space formed in the interior of the upper seat tube; a first engaging member having a cap shape; the first engaging member having a cover portion, a plunger portion and a bottom portion; the cover portion is disposed on the fixing seat The assembly channel faces away from the side of the upper seat tube; the outer periphery of the plunger portion is provided with a second joint portion, the position and structure of the second joint portion respectively corresponding to the first joint portion of the upper seat tube; and the bottom portion is concave a groove is provided, the inner edge of the groove is provided with a third joint portion; and a second joint member is disposed on a side of the first joint member facing the upper seat tube, and the second joint member is received In the housing space of the upper seat tube; the second connection The engaging member has a base and a protruding portion extending from a top side of the base toward a groove direction of the first engaging member, and an outer periphery of the protruding portion is provided with a fourth engaging portion, the fourth engaging portion The position and structure of the portion correspond to the third joint portion of the first joint member, respectively. The locking device of the bicycle seat tube according to claim 1, wherein the first engaging portion of the upper seat tube is a first internal thread, and the second engaging portion of the first engaging member is a first external thread, and The first internal thread and the first external thread are screwed together; and the third engaging portion of the groove of the first engaging member is a second internal thread, and the fourth engaging portion of the protruding portion of the second engaging member is a second external thread, the second internal thread and the second external thread are screwed together. The locking device for a bicycle seat tube according to claim 1 or 2, wherein the cover portion of the first engaging member is provided with a polygonal hole. The locking device for a bicycle seat tube according to claim 3, wherein the polygonal hole is a hexagonal hole. The locking device for a bicycle seat tube according to claim 1 or 2, wherein a diameter of the cover portion of the first engaging member is larger than a diameter of the assembling passage of the fixing seat. The locking device for a bicycle seat tube according to claim 1 or 2, wherein the locking device of the bicycle seat tube further has a coupling assembly; the coupling assembly is mounted on a side of the fixing seat facing away from the upper seat tube And the binding assembly has a first mounting block and a second mounting block; the first mounting block is detachably connected to the fixing seat, and the second mounting block is clamped to the first mounting block and the fixing Between the seats. The locking device for a bicycle seat tube according to claim 6, wherein the fixing seat has two joint portions, the two joint portions respectively extending radially from opposite sides of the assembly passage, and the two joints are combined The first mounting block is respectively provided with a through hole, and the second mounting block is recessed with a two-way groove, the through hole of the first mounting block and the second mounting block The through slot corresponds to the position of the through hole of the joint portion; the joint assembly further has two screws and two nuts, and the two nuts are respectively received inside the two through holes of the first mounting block, and the two screws are respectively The through hole of the joint portion and the through groove of the second mounting block are threaded and fixed to the nut inside the through hole of the first mounting block. The locking device for a bicycle seat tube according to claim 7, wherein a cushioning pad is disposed between each screw and each nut.