TWM486603U - Structural improvement of sprocket spindle of bike - Google Patents

Description

Bicycle sprocket mandrel structure improvement

This creation is about "a bicycle sprocket mandrel structure improvement", especially a sprocket mandrel structure of a bicycle assembled using a pressing element.

According to the eighth and ninth figures, it is an exploded perspective view of a conventional structure, which is mainly composed of a hollow shaft 91, a hollow sleeve 92, two bearings 93, and two covers 94. A sprocket 95 and two cranks 96 are formed; a tooth portion 911 is respectively disposed on the outer periphery of the two ends of the mandrel 91, and the two bearings 93 and the second cover 94 are disposed inside the sleeve 92, and the mandrel is utilized. The two bearings 93, the second cover 94 and the sprocket 95 are disposed. The proximal ends of each of the cranks 96 respectively have a perforation 961 and a screw hole 962, and the perforations 961 are respectively passed through the mandrel 91. And respectively, the tooth portion 911 of the mandrel 91 is engaged, and the screw holes 962 of the cranks 96 are respectively provided with a foot pedal (not shown), and the set position of the crank 96 is provided for the sprocket 95. Fixed.

The conventional mandrel 91 is assembled by aligning the toothed holes 961 of the crank 96 with the teeth 911 at both ends of the mandrel 91, and driving the mandrel 91 into the perforation 961 of the crank 96 by tapping. The tooth portion 911 is closely matched with the perforation 961. However, the assembly method is easy to damage the component and reduce the service life of the component, thereby affecting the service life of the component, and the assembly is tightly fitted and cannot be disassembled. Maintenance and use, not practical; Therefore, the lack of the aforementioned conventional structures is necessary for further improvement.

In view of the fact that there are still improvements in the current structure, the creator has been engaged in the multi-year production and sales experience of related products, and has been thinking about ways to improve the existing problems. After many improvements, he finally created a bicycle. The sprocket mandrel structure is improved.

Accordingly, the main purpose of the present invention is to provide an improved sprocket mandrel structure that is not only easy to assemble and disassemble, but also ensures the overall service life of the component and improves the safety of the structure.

Another object of the present invention is to provide a sprocket mandrel structure improvement of a bicycle having a simple structure and easy assembly.

In order to achieve the above object, the present invention proposes a bicycle sprocket mandrel structure improvement, which comprises: a hollow shaft, wherein the outer peripheral edges of the proximal ends of the mandrels are respectively provided with a first tooth portion and a second tooth portion. The second tooth portion has two or more axial slots, and the mandrel has an inner tapered surface at an inner edge of the second tooth portion; a hollow sleeve, and the inner edge surface of the sleeve is respectively provided with two convex portions a retaining edge, and the sleeve is sleeved on the mandrel; two bearings, each bearing is respectively provided for the mandrel, and each bearing is separately installed inside the sleeve, and is respectively arranged The two retaining edges; the two caps are respectively provided for the mandrel, and each cap is respectively disposed on the outer side of each bearing; a sprocket for the mandrel to be worn So that the sprocket can be placed in it a side of the cover; two cranks, each of the two ends of each crank has a perforation and a screw hole, each perforation is respectively passed through the mandrel, and respectively with the first tooth portion of the mandrel and The second tooth portion is engaged, and the screw holes of each crank are respectively provided for the foot pedal, and the crank is set at a position for fixing the sprocket; and a pressing group is a pressing sleeve and a screw lock member having an inner screw hole, and the pressing sleeve has an outer tapered surface with respect to an outer circumference of the inner tapered surface of the mandrel, and the pressing sleeve is disposed through the outer sleeve a second tooth portion of the mandrel, the outer tapered surface of the pressing sleeve is abutted against the inner tapered surface of the mandrel, and the screw locking member is screwed into the screw hole of the pressing sleeve, so that The pressing sleeve is screwed, and the second tooth portion is outwardly extended to closely mesh with the perforation of the crank.

Wherein, the mandrel has a flange at an end edge of the first tooth portion, and the flange is for the crank to abut the limit.

Wherein, the screw lock is a bolt.

Wherein, the head of the screw lock member abuts against the side of the perforation of the crank.

The axial section of the second tooth portion is set to three.

Wherein, the pressing sleeve is located at one end of the inner screw hole and has a hexagonal hole for the hexagonal tool to operate.

It may further include a lock fastener that passes through the sprocket and fixes the sprocket to the set position of the crank.

Wherein, the fastener is a bolt.

The following description of the preferred embodiment of the present invention is further described below in order to enable those skilled in the art to practice the present invention to be implemented in accordance with the present specification.

(this part of the creation)

10‧‧‧ mandrel

11‧‧‧First tooth

111‧‧‧Flange

12‧‧‧second tooth

121‧‧‧ slotting

122‧‧‧Inner cone

20‧‧‧ casing

21‧‧‧ 缘缘

30‧‧‧ Bearing

40‧‧‧ Cover

50‧‧‧Sprocket

51‧‧‧Locker

60‧‧‧ crank

61‧‧‧Aperture

62‧‧‧ screw holes

70‧‧‧force group

71‧‧‧forced sleeve

711‧‧‧Neutral hole

712‧‧‧ outer cone

713‧‧‧ hexagon socket

72‧‧‧ Screw locks

721‧‧‧ head

80‧‧‧5-way pipe

(previous part)

91‧‧‧ mandrel

911‧‧‧ teeth

92‧‧‧ casing

93‧‧‧ bearing

94‧‧‧ Cover

95‧‧‧Sprocket

96‧‧‧ crank

961‧‧‧Aperture

962‧‧‧ screw hole

The first picture is a three-dimensional exploded view of the creation.

The second picture is a three-dimensional appearance of another perspective of the present creation.

The third picture is a three-dimensional combination diagram of the creation.

The fourth figure is a schematic cross-sectional view of the combination before the creation.

The fifth figure is a schematic cross-sectional view of the combination of the creations.

The sixth figure is a three-dimensional exploded view of the embodiment of the present invention installed in front of the frame.

The seventh figure is a three-dimensional exploded view of the embodiment of the present invention installed on the frame.

The eighth figure is a perspective exploded view of a conventional structure.

The ninth diagram is a schematic cross-sectional view of a conventional structure.

First, please refer to the first to seventh figures. The present invention is a bicycle sprocket mandrel structure improvement, which comprises: a hollow shaft 10, and the outer periphery of the proximal end of the mandrel 10 is respectively provided with a The first tooth portion 11 and the second tooth portion 12 have two or more axial slots 121, and the mandrel 10 has an inner tapered surface 122 at the inner edge of the second tooth portion 12. a hollow sleeve 20, the inner edge surface of the sleeve 20 is respectively provided with two protruding retaining edges 21, and the sleeve 20 is sleeved on the mandrel 10; the two bearings 30, each bearing 30 are respectively The mandrel 10 is disposed, and each of the bearings 30 is respectively disposed inside the sleeve 20, and is respectively disposed on each of the retaining edges 21; and two covers 40, each of the caps 40 being respectively supplied to the mandrel 10 Wear and seal The cover 40 is respectively disposed on the outer side of each bearing 30; a sprocket 50 for the mandrel 10 to be worn so that the sprocket 50 can be disposed on the side of one of the covers 40; The two cranks 60 have a perforating hole 61 and a screw hole 62 respectively at the two ends of each crank 60. The perforations 61 are respectively passed through the mandrel 10 and respectively respectively with the first tooth portion 11 of the mandrel 10. And a second tooth portion 12 is engaged, and the screw holes 62 of the cranks 60 are respectively provided with a foot pedal (not shown), and the set position of the crank 60 is fixed for the sprocket 50; The tensioning group 70 is composed of a pressing sleeve 71 and a screwing member 72. The pressing sleeve 71 has an inner screw hole 711, and the pressing sleeve 71 is opposite to the spindle 10 The outer peripheral edge of the tapered surface 122 has an outer tapered surface 712, and the pressing sleeve 71 is disposed on the second tooth portion 12 of the mandrel 10, so that the outer tapered surface 712 of the pressing sleeve 71 can abut the same The inner surface of the spindle 10 has a tapered surface 122, and the screw member 72 is screwed into the inner screw hole 711 of the pressing sleeve 71 to screw the pressing sleeve 71 to cause the second tooth portion 12 to The outer portion is stretched to be in close contact with the perforation 61 of the crank 60.

The mandrel 10 has a flange 111 at the end of the first tooth portion 11, and the flange 111 is for the crank 60 to abut.

Wherein, the screw lock 72 is a bolt.

The head 721 of the screw member 72 is abutted against the side of the perforation 61 of the crank 60.

The axial groove 121 of the second tooth portion 12 is set to three.

The tension sleeve 71 has a hexagon socket 713 at one end of the inner screw hole 711, and the hexagon socket 713 is operated by a hexagonal tool (not shown).

It may further include a lock fastener 51 that passes through the sprocket 50 and fixes the sprocket 50 to the set position of the crank 60.

The lock 51 is a bolt.

With the above combination, please continue to refer to the first to seventh figures, the user can install the creation on the bicycle five-way tube 80 (as shown in the sixth and seventh figures) The main purpose is to first install the sleeve 20, the bearing 30 and the cover 40 on the five-way pipe 80, and insert the mandrel 10 on one side of the sprocket 50 and the crank 60 into the sleeve 20. Thereafter, the mandrel 10 is different from one end of the sprocket 50 to mount another crank 60 (as shown in the fourth and sixth figures), and the tensioning group 70 is used to firmly position the side crank 60; The pressing sleeve 71 of the tight set 70 penetrates into the mandrel 10, so that the outer tapered surface 712 of the pressing sleeve 71 can abut against the inner tapered surface 122 of the mandrel 10, and the screw locking member 72 is screwed to the pressing sleeve. The screw hole 711 is 71 so as to be screwed into the sleeve 71, so that the second tooth portion 12 is outwardly extended to closely engage the tooth hole 61 of the crank 60 (as shown in the fifth and seventh figures). Show), thus completing the assembly and positioning of the creation, the overall operation mode is simple and convenient, and practical.

Since the assembly method of the present invention is assembled by using the pressing group 70, it is only necessary to use the screw lock 72 to screw the pressing sleeve 71, so that the outer tapered surface 712 of the pressing sleeve 71 pushes the inner tapered surface 122 of the mandrel 10, The second tooth portion 12 of the mandrel 10 is outwardly extended to be closely engaged with the perforation 61 of the crank 60, and the assembly method is simple, and it is not necessary to perform the tapping assembly as in the conventional structure, which is not only easy to assemble and disassemble, It also ensures the overall service life of the components and improves the safety of the structure, which is safe and practical.

In summary, the sprocket mandrel structure of the bicycle has been improved, effectively improving the various shortcomings of the conventional structure, and the main technical means of the creation are not found in any related publications, and the application requirements of the new patent are met. , 提出 Apply in accordance with the law, and ask the SIPO to grant the patent right.

10‧‧‧ mandrel

11‧‧‧First tooth

111‧‧‧Flange

12‧‧‧second tooth

121‧‧‧ slotting

20‧‧‧ casing

21‧‧‧ 缘缘

30‧‧‧ Bearing

40‧‧‧ Cover

50‧‧‧Sprocket

51‧‧‧Locker

60‧‧‧ crank

61‧‧‧Aperture

62‧‧‧ screw holes

70‧‧‧force group

71‧‧‧forced sleeve

711‧‧‧Neutral hole

712‧‧‧ outer cone

72‧‧‧ Screw locks

721‧‧‧ head

Claims (8)

A bicycle sprocket mandrel structure is improved, comprising: a hollow shaft, wherein a proximal end of the proximal end of the mandrel is respectively provided with a first tooth portion and a second tooth portion, and the second tooth portion has two or more An axially-dissected groove, wherein the mandrel has an inner tapered surface at an inner edge of the second tooth portion; a hollow sleeve, the inner edge surface of the sleeve is respectively provided with two protruding retaining edges, and the sleeve The sleeve is sleeved on the mandrel; the two bearings are respectively provided for the mandrel, and the bearings are respectively installed inside the sleeve and respectively disposed on the respective retaining edges; the second cover, Each of the caps is respectively disposed for the mandrel, and each cap is respectively disposed on the outer side of each bearing; a sprocket for the mandrel to be passed, so that the sprocket can be set a side of one of the covers; two cranks, each of the two ends of each crank has a perforation and a screw hole, respectively, each perforation is for the mandrel to pass through, and respectively with the first tooth of the mandrel And a second tooth portion is engaged, and the screw holes of each crank are respectively provided for the foot pedal, and the set position of the crank is for the sprocket to be fixed; The tensioning group is composed of a pressing sleeve and a screw locking member, the pressing sleeve has an inner screw hole, and the pressing sleeve has an outer cone with respect to an outer circumference of the inner tapered surface of the mandrel And the pressing sleeve is disposed on the second tooth portion of the mandrel such that the outer tapered surface of the pressing sleeve abuts against the inner tapered surface of the mandrel, and the screw locking member is screwed on The inner screw hole of the pressing sleeve is configured to screw the pressing sleeve, and the second tooth portion is outwardly extended to closely mesh with the perforation of the crank. The bicycle sprocket mandrel structure improvement as described in claim 1 of the patent scope, wherein The mandrel has a flange at an end edge of the first tooth portion, the flange being for the crank to abut the limit. The bicycle sprocket mandrel structure improvement according to claim 1, wherein the screw lock is a bolt. The bicycle sprocket mandrel structure according to claim 1, wherein the head of the screw member is abutted against a side of the perforation of the crank. The bicycle sprocket mandrel structure according to claim 1, wherein the second tooth portion has three axial slots. The bicycle sprocket mandrel structure according to claim 1, wherein the pressing sleeve has a hexagon socket at one end of the inner screw hole, and the hexagon socket is operated by a hexagonal tool. The bicycle sprocket mandrel structure improvement according to the first aspect of the invention, further comprising a locker, the fastener is threaded through the sprocket, and the sprocket is fixed at the set position of the crank . The sprocket mandrel structure of the bicycle according to claim 7 is improved, wherein the fastener is a bolt.