JP3001992U - Bicycle hanger structure - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] By increasing the inner diameter of the hugger's lug,
One wall thickness can be taken sufficiently and processing becomes easy. Also, since a large diameter ball can be used for the bearing, the bearing strength is increased,
Furthermore, when a crankshaft unit is used, the ball in this unit also has a large diameter, so that a unit with improved bearing strength can be used. [Structure] One of the left and right lugs 1 of the hanger portion 10 of the bicycle
The inner diameter of 6, or the inner diameters of the left and right lags are formed to be larger than the central portion or a large diameter lag of 40 mm to 60 mm, and the bearing portion of the crankshaft 38 is borne by the large diameter lag, or A ball bearing member is fitted and fixed on the inner peripheral surface of the large diameter lug, and a ball 40 is brought into contact with this to bear the crankshaft, or one large diameter lug and the other small diameter lug are made to correspond to each other. A crankshaft unit is formed, mounted on a hanger portion, and a crankshaft used for this is formed of a pipe material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bicycle hanger structure in which a crankshaft is attached to a bicycle hanger.

[0002]

[Prior art]

 1 shows a hanger portion of a bicycle. The hanger portion 10 is formed on a frame 12 of a bicycle 11, and a crankshaft 15 for fixing a gear crank 14 having a pedal 13 is rotatably inserted therein.

FIG. 2 shows a structure of a conventional hanger portion. The hanger portion 10 described above is formed as a separate member from the frame 12, is welded to the frame 12, and further penetrates the hanger portion 10 in the left-right direction. Female screws 17 and 17 are engraved on the inner peripheral surfaces of the left and right lugs 16 and 16. These female screws 17 and 17 are screwed with male screws 19 and 19 engraved on the outer peripheral surfaces of the left and right ones 18, 18. The left and right ball contact portions 20 and 20 of the crankshaft 15 and the ball contact portions 21 and 21 of the left and right ones 18 and 18 so that the crankshaft 15 can be moved to the left and right. Bearings on the No. 18, 18. In the figure, numeral 23 is a hanger lock nut, and numeral 24 is a gear plate mounted on the right side of the crankshaft 15.

In the case of the hanger portion structure as described above, the left and right lugs 16 and 16 of the hanger portion 10 are usually formed of a straight pipe material, and the inner diameter thereof is 34. It is formed to the extent that 8 mm can be formed (inner diameter of about 33 mm and outer diameter of 40 mm or less).

However, as described above, when the left and right lugs 16 and 16 are formed of straight pipe material and have the above-described dimensions, this has a small diameter, and the ones 18 and 18 attached thereto have a small diameter. It is necessary to reduce the wall thickness of the male screw 19 part, which makes the strength uncertain, and it also takes time to process. Also, the balls 22 used for the bearing must use small-diameter balls. There is also a problem that the strength cannot be obtained sufficiently, the right one of the right crankshaft bearing to which the gear plate is attached and the ball on the one side are easily damaged, and the bearing strength of this part is sufficiently obtained. There was no problem.

Further, since the lugs 16 and 16 of the conventional hanger portion 10 described above have a small diameter, when a crankshaft unit that is a unit bearing a crankshaft in the sleeve is mounted, the unit is also small and compact. Since the internal space is not sufficient because of the need to configure, the diameter of the balls used for the bearing is also small, and the balls of the bearing are easily damaged as in the previous case. There is a problem that it becomes expensive.

[0007]

[Problems to be solved by the device]

 In this invention, by making the inner diameter of the hugger part larger than the center part, the wall thickness of the one can be taken sufficiently and processing becomes easy, and the ball used for the bearing is a large diameter ball. Can be used to improve the durability of the balls and improve the bearing strength. Furthermore, when using a crankshaft unit, the balls in this unit also have a large diameter to improve the bearing strength. The purpose is to provide a bicycle hanger structure that can be used.

[0008]

[Means for Solving the Problems]

 In this invention, the inner diameter of one of the right and left lugs of the hanger portion of the bicycle, or the inner diameter of both the left and right lugs is formed to be larger than the central portion or a large diameter lag of 40 mm to 60 mm, and the large diameter The structure is characterized by a bicycle hanger structure in which the crankshaft bearing corresponding to the lug is supported by the large diameter lug.

[0009]

[Operation and effect of the device]

 According to this invention, if the inner diameter of the lug is formed to be a large diameter, the thickness of the one used for this can be made thicker and the outer diameter can be made larger, so that the strength of the one itself can be increased, and the work and the work can be performed. It will be easy. Also, since large diameter balls can be used, assembly work is easy, and the combination of one thick wall large diameter and large diameter balls improves bearing strength and durability, and it is a lightweight pipe material. The formed crankshaft can also be used, and in the case of a crankshaft unit, an internal space can be obtained and the ball diameter can be increased to improve the bearing strength and durability.

[0010]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawing shows the structure of the hanger portion of the bicycle. In FIG. 3, the hanger portion 10 is the hanger portion 10 of the bicycle 11 shown in FIGS. 1 and 2 which has already been described. 2) and a left-side lag 16b which is the side without the gear plate.

Both the left and right lugs 16a, 16b described above are formed to have a large diameter with respect to the central portion 16c. For example, if the central portion 16c has an inner diameter of about 33 mm, the inner diameter is 40 mm to 45 mm. Female screws 31a and 31b are screwed on this.

[0012] Male screws 33a, 33b that engage with the above-mentioned female screws 31a, 31b are engraved on the outer peripheral surfaces of the left and right ones 32a, 32b, and the right one 32a is on the gear plate side and on the outer ends. Is connected to the end of the right-side lug 16a by pressure when the collar 34 is connected and screwed, and a wrench hole 35a is formed in the center of the outer end. This hole 35a is, for example, a hexagonal hole or Operate using a hexagonal wrench or octagonal wrench that is formed with an octagonal hole and is shaped accordingly. Since the right lug 16a has a large diameter, the right one 32a also has a large diameter in the wrench hole 35a. Therefore, it is possible to form the wrench hole 35a in the central portion.

A lock nut 36 is screwed on the outer end of the left one 32b without a collar. Then, by inserting balls 40 between the ball contact portions 37a, 37b of the left and right ones 32a, 32b and the left and right ball contact portions 39a, 39b of the crankshaft 38, the crankshaft 38 can be moved to the left and right. The ones 32a, 32b can be supported by the left and right lugs 16a, 16b.

A wrench hole 35b is also formed in the center of the outer end of the left one 32b, and this hole 35b is also formed, for example, as a hexagonal hole or an octagonal hole, and a hexagonal shape formed in a corresponding shape. Operate using a wrench or an octagonal wrench. Since the lug 16b and the wrench hole 35b have a large diameter, the left one 32b is also formed to have a large diameter, and therefore, the wrench hole 35b can be formed in the center portion. Further, the ball 40 having a larger diameter than the conventional one (see FIG. 2) can be used.

The above-mentioned crankshaft 38 has a large diameter in the central axis and has a pipe-like shape, which is formed by drawing a pipe material by drawing.

By forming the hanger portion 10 as described above, that is, by forming the inner diameters of the left and right lugs 16a, 16b in a specified dimension larger than the central portion 16c, the one 32a, The thickness and shape of 32b can also be made larger for the ball 40, and by making it larger than the ones 32a, 32b, the strength (rigidity) is increased and the work (for example, wrench holes 35a, 35b) and Processing becomes easier, the crankshaft 38 formed of a lightweight pipe material can be used, and a large-diameter ball can be used as the ball 40, so that the bearing strength can be improved.

FIG. 4 shows another embodiment. Elements having the same functions as those of the components shown in FIG. 3 are designated by the same reference numerals and detailed description thereof will be omitted. However, both the left and right lugs 16a, 16b are formed to have a large diameter equivalent to that of the first embodiment described above, the inner peripheral surface is formed of a separate member, and the left and right lugs 16a, 16b are not affected by welding deformation. The ball contact members 41a and 41b formed in Step 3 are press-fitted and fixed, and the ones 32a and 32b as shown in FIG. 3 are omitted.

The ball contact members 41a, 41b are prevented from rotating by press fitting, but another method is to engrave a knurl on the outer peripheral surface of the ball contact members 41a, 41b, for example, on the small diameter side thereof. Then, it may be bitten into the lugs 16a and 16b and fixed, or other detent means may be formed.

On the other hand, the crankshaft 38 is formed solid and the right ball contact portion 39a is integrally formed, while the left side is formed of a ball contact ring 42. The ball bearing ring 42 has a female screw 43 formed therein, which is screwed onto a male screw 44 of the crankshaft 38 to set the position, and is fixed by a lock nut 46 via a spring washer 45. Note that 47a and 47b are seal members. When configured as described above, the same operation and effect as those of the embodiment shown in FIG. 3 are achieved, and the structure is simplified.

FIG. 5 shows still another embodiment. In the hanger portion 10 shown in FIGS. 3 and 4, the left and right lugs 16a and 16b are both the central portion 16c and the first embodiment. Similarly, although it is formed to have a large diameter, in this embodiment, only one side of the right-side lug 16a on the side where the gear plate is located has a large diameter, and the other left side has a small-diameter lug 16b similar to the central portion 16c. And the end portion is formed into a curved shape to form a receiving portion 49 for receiving the ball bearing member 48 in a press-fitted state (non-rotating state), and the ball 50 has a small diameter. The left side ball contact portion 39b of 38 is also formed correspondingly. The receiving portion 49 may be bent at 90 degrees or the like.

The right one 32a has the same structure as that shown in FIG. 3 described above, but is screwed through a spring washer 51 so that the position can be adjusted. Thus, even if only the right side lug 16a on one side is formed to have a large diameter, this one side can achieve the same operation and effect as the embodiment described in FIG.

FIG. 6 shows still another embodiment, which is different from the above-mentioned embodiment in FIG. 5 only in the ball-contact structure on the right side. Therefore, the same reference numerals are given to the other same components. Although the detailed description is omitted, the ball contact ring 52 on the side of the large-diameter right-side lug 16a is formed with a male screw 53 on the outer periphery and screwed with the female screw 31a of the right-side lug 16a to set the position. Further, it is fixed to a set position with a lock nut 55 via a spring washer 54.

The inner hole 56 of the ball striking ring 52 and the inner hole 57 of the lock nut 55 are, for example, hexagonal holes or octagonal holes, and a hexagon wrench or octagonal hole formed in a shape corresponding thereto. Operate using a wrench. Since the right-side lug 16a of these inner holes 56 and 57 also has a large diameter, the ball bearing ring 52 and the lock nut 55 are also formed to have a large diameter, and hence it is possible to form them in the central portion. Even with this structure, the same operation and effect as those of the embodiment shown in FIG. 5 can be achieved. The large diameter on one side of the lag may be formed on the left lag 16b.

FIG. 7 shows still another embodiment, and this embodiment shows a crankshaft unit 60 in which the crankshaft 38 is housed in a sleeve so as to be housed therein. In the hanger portion 10, only one side of the right side lug 16a on the side where the gear plate is located has a large diameter, and the other left side has a lug 16b having a small diameter similar to the central portion 16c.

In the crankshaft unit 60 described above, the sleeve 61 is formed with a large diameter on the gear plate side corresponding to the shape of the lug 16a and the brim 62 is continuously provided, and the female screw 31a of the lug 16a is provided on the outer peripheral portion. A male screw 63 that is screwed with is formed. Also, the ball 40 on the gear plate side of the crankshaft unit 60 has a large diameter. Incidentally, 64 is a seal.

A male screw 65 is engraved on the outer peripheral surface of the other small-diameter sleeve 61, and a mounting nut 67 is screwed onto the male screw 65 via a spring washer 66 to attach the crankshaft unit 60 to the lugs 16 a, 16 b. Installed on. Thus, even in the case of the crankshaft unit 60, if the right-side lug 16a is formed to have a large diameter as in the first embodiment, the inside of the sleeve 61 on the side corresponding to this can also have a space and a large diameter ball. 40 can be used, and the bearing strength and durability on the gear side can be improved.

The left-side lug 16b may be formed to have a large diameter and the crankshaft unit 60 may be configured to correspond thereto. Further, in the above-mentioned embodiment, when the inner diameter of the central portion of the large diameter lugs 16a, 16b is about 33 mm, the inner diameter of the large diameter portion is 40 mm to 60 mm, and the large diameter range is the bearing of the crankshaft 38. It depends on the structure, for example, the diameter of the ball used, the structure of one used or not used.

[Brief description of drawings]

FIG. 1 is a partial side view of a bicycle.

FIG. 2 is a cross-sectional view showing a conventional hanger portion.

FIG. 3 is a sectional view of a hanger portion according to the present invention.

FIG. 4 is a sectional view showing a hanger portion of another embodiment.

FIG. 5 is a sectional view showing a hanger portion of another embodiment.

FIG. 6 is a sectional view showing a hanger portion of another embodiment.

FIG. 7 is a sectional view showing a hanger portion of another embodiment.

[Explanation of symbols]

 10 ... Hanger part 16a, 16b ... Ragg 16c ... Ragg center part 38 ... Crankshaft 40 ... Ball 41a, 41b, 48 ... Ball contact member 60 ... Crankshaft unit 61 ... Sleeve

Claims (10)

[Scope of utility model registration request] 1. A bicycle in which one of right and left lagging portions of a bicycle has a larger inner diameter than a central portion, and a crankshaft bearing portion on a side corresponding to the large diameter lug is supported by the large diameter lug. Hanger structure. 2. A hanger portion structure for a bicycle according to claim 1, wherein a crankshaft unit is formed corresponding to one large diameter lug and the other small diameter lug, and the crankshaft unit is mounted on a hanger portion. 3. A large-diameter lug having an inner diameter of one of right and left sides of a hanger portion of a bicycle is 40 mm to 60 mm, and a crankshaft bearing portion corresponding to the large-diameter lug is borne by the large-diameter lug. Bicycle hanger structure. 4. A hanger portion structure for a bicycle according to claim 3, wherein a crankshaft unit is formed corresponding to one large diameter lug and the other small diameter lug, and the crankshaft unit is mounted on a hanger portion. 5. A structure of a hanger part of a bicycle, wherein both left and right lag inner diameters of a bicycle hanger part are formed to have a larger diameter than a center part, and left and right bearing parts of a crankshaft are supported by the left and right large diameter lugs. 6. The hanger structure for a bicycle according to claim 5, wherein a ball contact member is fitted and fixed on the inner peripheral surface of the large-diameter lug, and the ball is brought into contact with the ball contact member to bear the crankshaft. 7. The bicycle hanger structure according to claim 5, further comprising a crankshaft formed of a pipe material. 8. A bicycle hanger portion structure in which both left and right lag inner diameters of a bicycle hanger portion are formed as large diameter lags of 40 mm to 60 mm, and the left and right bearing portions of the crankshaft are supported by the left and right large diameter lugs. 9. The hanger structure for a bicycle according to claim 8, wherein a ball contact member is fitted and fixed to the inner peripheral surface of the large diameter lug, and the ball is brought into contact with the ball bearing to support the crankshaft. 10. The structure of a bicycle hanger according to claim 8, wherein a crankshaft made of pipe material is mounted.