CN209795725U

CN209795725U - Bicycle press-in type center shaft dismounting tool

Info

Publication number: CN209795725U
Application number: CN201920613562.1U
Authority: CN
Inventors: 曹建新
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2019-12-17
Anticipated expiration: 2029-04-30

Abstract

The utility model belongs to the technical field of the technique of bicycle press-in axis dismantlement technique and specifically relates to a bicycle press-in axis extracting tool, which comprises a bicycle frame, the fixed bicycle seat that is equipped with on the bicycle frame, it is connected with the bicycle front wheel to rotate through the bearing on the front truck of bicycle frame, on the bicycle frame and correspond with the bicycle front wheel and be equipped with the bicycle handle, rotate through the bearing on the after-poppet of bicycle frame and be connected with the bicycle rear wheel, the below of bicycle seat is and be located the welding on the bicycle frame and have the well axle sleeve, the axis has been cup jointed to the telescopic inner wall of axle, centraxonial inside is equipped with expansion sleeve, expansion sleeve runs through well axle sleeve and extends to the telescopic outside of well axle, expansion sleeve's inside is equipped with the inflation hammer. The utility model discloses an inflation is used in the design and dismantles, can be applicable to the axis of not equidimension bicycle, and easy operation simultaneously, performance is strong, consequently very suitable using widely on a large scale.

Description

Bicycle press-in type center shaft dismounting tool

Technical Field

The utility model relates to a technical field is dismantled to bicycle press-in axis specifically is a bicycle press-in axis extracting tool.

Background

The middle shaft is a rotating part which is arranged in a five-way of the frame and is used for connecting a left crank and a right crank, but the middle shaft is generally used for being broken by a straight line and matched with a small hammer to carry out 'impact' to detach the middle shaft for replacement or maintenance at present, but the traditional method leads to the result that the middle shaft is difficult to detach, causes difficult maintenance, wastes time and labor, reduces the working efficiency and lacks a simple tool which can be suitable for detaching different middle shafts.

To sum up, the utility model discloses a design a bicycle press-in axis extracting tool and solve the problem that this type of exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bicycle press-in axis extracting tool to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

A bicycle press-in type center shaft disassembling tool comprises a bicycle frame, a bicycle seat is fixedly arranged on the bicycle frame, a front wheel of a bicycle is rotatably connected onto the front frame of the bicycle frame through a bearing, a bicycle handle is arranged on the bicycle frame and corresponds to the front wheel of the bicycle, a rear frame of the bicycle frame is rotatably connected onto a rear wheel of the bicycle through a bearing, a center shaft sleeve is welded on the bicycle seat and is positioned below the bicycle frame, a center shaft is sleeved on the inner wall of the center shaft sleeve, an expansion sleeve is arranged inside the center shaft and penetrates through the center shaft sleeve and extends to the outside of the center shaft sleeve, an expansion hammer is arranged inside the expansion sleeve, a threaded hole is fixedly formed in the expansion hammer, a dividing groove is fixedly formed in the expansion sleeve, and a slotted hole is fixedly formed in the expansion sleeve and corresponds to the dividing groove, the interior of the expansion sleeve is connected with the interior of the threaded hole through a hexagon socket head cap screw.

Preferably, the connecting structure of the shaft sleeve and the middle shaft is a detachable structure.

preferably, the expansion sleeve and the expansion hammer are both made of 304# stainless steel.

Preferably, the connection mode of the hexagon socket head cap screw and the threaded hole is threaded connection and detachable.

preferably, one end of the expansion hammer, which is in contact with the expansion sleeve, is in a conical shape, and the outer wall of the other end of the expansion hammer is subjected to knurling treatment.

Preferably, the connecting structure of the middle shaft and the expansion sleeve and the connecting structure of the expansion sleeve and the expansion hammer are all detachable structures.

Preferably, the four partition grooves are provided with four equiangularly arranged expansion sleeves, the four partition grooves are correspondingly provided with four slotted holes and are all of a communication structure, and the contact ends of the expansion sleeves and the expansion hammers are arranged in a J shape.

Preferably, the dividing groove and the slotted hole are machined by a numerical control milling machine.

Compared with the prior art, the beneficial effects of the utility model are that:

1. The utility model discloses in, through the inside with expansion hammer knob advance expansion sleeve, and then make four the same shell fragments on the expansion sleeve and under the effect that the J type set up, with expansion sleeve and the inside inseparable cooperation of axis, hammer the outside expansion sleeve's of expansion sleeve one end with appurtenance bobbing this moment, so that expansion sleeve, expansion hammer takes axis and well axle sleeve to break away from, and then accomplish the dismantlement, the process is used the inflation to dismantle this moment, it is difficult to dismantle to have solved the axis, lead to the maintenance difficulty to waste time and energy simultaneously, so that so as to lead to the problem that work efficiency reduces, thereby the operation is simple, the work efficiency of maintenance is improved.

2. The utility model discloses in, be applicable to the centraxonial dismantlement of the forced of multiple specification through the instrument, more general, it is simpler, more convenient, performance is strong, consequently uses widely on a large scale with the suitable.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged structural diagram of the middle axle structure of the present invention;

FIG. 3 is a schematic diagram of a partial explosion structure of the present invention;

FIG. 4 is a schematic view of the sectional structure of the middle shaft of the present invention;

Fig. 5 is a schematic structural view of the expansion hammer of the present invention;

Fig. 6 is a schematic structural view of the expansion sleeve of the present invention.

In the figure: 1-bicycle frame, 2-bicycle saddle, 3-bicycle front wheel, 4-bicycle handle, 5-bicycle rear wheel, 6-middle shaft sleeve, 7-middle shaft, 8-expansion sleeve, 9-expansion hammer, 10-threaded hole, 11-dividing groove, 12-slotted hole and 13-inner hexagon bolt.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution:

A bicycle press-in type center shaft dismounting tool comprises a bicycle frame 1, a bicycle seat 2 is fixedly arranged on the bicycle frame 1, a front wheel 3 of a bicycle is rotatably connected to the front frame of the bicycle frame 1 through a bearing, a bicycle handle 4 is arranged on the bicycle frame 1 and corresponds to the front wheel 3 of the bicycle, a rear wheel 5 of the bicycle is rotatably connected to the rear frame of the bicycle frame 1 through a bearing, a center shaft sleeve 6 is welded to the lower portion of the bicycle seat 2 and is positioned on the bicycle frame 1, a center shaft 7 is sleeved on the inner wall of the center shaft sleeve 6, an expansion sleeve 8 is arranged inside the center shaft 7, the expansion sleeve 8 penetrates through the center shaft sleeve 6 and extends to the outside of the center shaft sleeve 6, an expansion hammer 9 is arranged inside the expansion sleeve 8, a threaded hole 10 is fixedly formed in the expansion hammer 9, a dividing groove 11 is fixedly formed in the expansion sleeve 8, a slotted hole 12 is fixedly formed in the expansion sleeve, the expansion sleeve 8 is prevented from being broken in the process that four identical elastic sheets are expanded due to the division grooves 11, the inner portion of the expansion sleeve 8 is provided with a conical arrangement at one end, which is connected with the expansion hammer 9 in the threaded hole 10 through the hexagon socket head cap screw 13 and is in contact with the expansion sleeve, the effect is that the expansion hammer 9 enters the expansion sleeve 8 gradually, the outer wall of the other end of the expansion hammer 9 is subjected to knurling treatment, and the effect is that the friction force can be increased.

the utility model discloses work flow: when the bicycle press-in type center shaft 7 is disassembled, four expansion sleeves 8 are arranged at equal angles on the dividing grooves 11 to form four same elastic sheets, the four dividing grooves 11 are correspondingly provided with four slotted holes 12 and are all of a communicated structure, under the action that the contact ends of the expansion sleeves 8 and the expansion hammers 9 are arranged in a J shape, the four same elastic sheets on the expansion sleeves 8 are pressed together by hands, at the moment, the other ends of the expansion sleeves 8 sequentially penetrate through the center shaft sleeve 6 of the center shaft 7 and extend to the outside of the center shaft sleeve 6, meanwhile, auxiliary tools, small hammers are matched with the expansion hammers 9 to enable the expansion sleeves 8 to completely enter the inside of the center shaft 7, at the moment, the conical ends of the expansion hammers 9 are inserted into the inside of the expansion sleeves 8 in the center shaft 7, the hexagon socket head bolts 13 are connected with the threaded holes 10 on the expansion hammers 9 through the inside of the expansion sleeves 8, and the hexagon socket head bolts 13, thereby 9 knobs of hammer expansion are advanced inside of expansion sleeve 8, and then make four the same shell fragments on the expansion sleeve 8 and under the effect that the J type set up, with the inside close fit of expansion sleeve 8 and axis 7, use the one end of 8 outside expansion sleeve of auxiliary tool bobbing expansion sleeve 8 this moment, so that expansion sleeve 8, expansion hammer 9 takes axis 7 and axis sleeve 6 to break away from, and then accomplish the dismantlement, the process is used the inflation to dismantle this moment, can be applicable to axis 7 of not equidimension bicycle, and easy operation is the same, high performance, therefore use widely on a large scale with suiting.

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a bicycle press-in type axis extracting tool, includes bicycle frame (1), its characterized in that: the bicycle is characterized in that a bicycle seat (2) is fixedly arranged on the bicycle frame (1), a bicycle front wheel (3) is rotatably connected onto the front frame of the bicycle frame (1) through a bearing, a bicycle handle (4) is arranged on the bicycle frame (1) and corresponds to the bicycle front wheel (3), a bicycle rear wheel (5) is rotatably connected onto the rear frame of the bicycle frame (1) through a bearing, a middle shaft sleeve (6) is welded on the bicycle frame (1) below the bicycle seat (2), a middle shaft (7) is sleeved on the inner wall of the shaft sleeve (6), an expansion sleeve (8) is arranged inside the middle shaft (7), the expansion sleeve (8) penetrates through the middle shaft sleeve (6) and extends to the outside of the middle shaft sleeve (6), an expansion hammer (9) is arranged inside the expansion sleeve (8), and a threaded hole (10) is fixedly formed in the expansion hammer (9), the expansion sleeve (8) is fixedly provided with a dividing groove (11), the expansion sleeve (8) is fixedly provided with a slotted hole (12) corresponding to the dividing groove (11), and the interior of the expansion sleeve (8) is connected with the interior of the threaded hole (10) through an inner hexagonal bolt (13).

2. The bicycle push-in bottom bracket hanger of claim 1, wherein: the connecting structure of the shaft sleeve (6) and the middle shaft (7) is a detachable structure.

3. The bicycle push-in bottom bracket hanger of claim 1, wherein: the expansion sleeve (8) and the expansion hammer (9) are both made of 304# stainless steel.

4. The bicycle push-in bottom bracket hanger of claim 1, wherein: the inner hexagonal bolt (13) and the threaded hole (10) are connected in a threaded manner and are detachable.

5. The bicycle push-in bottom bracket hanger of claim 1, wherein: one end of the expansion hammer (9), which is in contact with the expansion sleeve (8), is arranged in a conical manner, and the outer wall of the other end of the expansion hammer (9) is subjected to knurling treatment.

6. The bicycle push-in bottom bracket hanger of claim 1, wherein: the connecting structure of the middle shaft (7) and the expansion sleeve (8) and the connecting structure of the expansion sleeve (8) and the expansion hammer (9) are all detachable structures.