Bicycle chain wheel positioning tool

Abstract

The bicycle chain wheel positioning tool comprises a base, an L-shaped plate is fixedly connected to the left end of the upper surface of the base, an electric cylinder is fixedly connected to the middle of the lower surface of the L-shaped plate, and a piston rod is installed at the output end of the lower surface of the electric cylinder; an upper connecting rod is fixedly connected to the lower surface of the piston rod, an upper disc is rotatably connected to the end, away from the piston rod, of the upper connecting rod through a bearing, an upper positioning column is fixedly connected to the middle of the lower surface of the upper disc, and a motor is fixedly connected to the middle of the upper surface of the base. A lower connecting rod is fixedly connected to the upper surface of the rotating shaft, a lower disc is fixedly connected to the end, away from the rotating shaft, of the lower connecting rod, and a lower positioning column is fixedly connected to the middle of the upper surface of the lower disc; through cooperation of the structures, the chain wheel can be positioned and clamped when the side face of the bicycle chain wheel is rotationally polished, and convenience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycle sprocket positioning tooling, in particular to a bicycle sprocket positioning tooling. Background Art

[0002] Bicycle sprockets are important components of bicycles. Their main function is to transmit power so that the bicycle can move forward. Bicycle sprockets can be divided into two types according to their structure: single-speed bicycle sprockets and multi-speed bicycle sprockets. Single-speed bicycle sprockets have only one gear, while multi-speed bicycle sprockets have multiple gears.

[0003] When processing a bicycle sprocket, it is necessary to grind the side teeth of the sprocket. In the prior art, the sprocket needs to be continuously rotated when grinding the sprocket so as to grind different sides of the sprocket. After the rotation, the sprocket needs to be continuously fixed and positioned so as to grind the sprocket, which is inconvenient to use.

[0004] For this reason, a bicycle sprocket positioning tool is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a bicycle sprocket positioning tool to maintain the positioning and clamping of the sprocket when the side of the bicycle sprocket is rotated and polished, thereby improving convenience.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A bicycle sprocket positioning tool, comprising a base, an L-shaped plate fixedly connected to the left end of the upper surface of the base, an electric cylinder fixedly connected to the middle of the lower surface of the L-shaped plate, a piston rod installed at the output end of the lower surface of the electric cylinder, an upper connecting rod fixedly connected to the lower surface of the piston rod, an end of the upper connecting rod away from the piston rod is rotatably connected to an upper disc through a bearing, and an upper positioning column fixedly connected to the middle of the lower surface of the upper disc;

[0008] A motor is fixedly connected to the middle part of the upper surface of the base, a rotating shaft is installed on the output end of the upper surface of the motor, a lower connecting rod is fixedly connected to the upper surface of the rotating shaft, a lower disc is fixedly connected to the end of the lower connecting rod away from the rotating shaft, and a lower positioning column is fixedly connected to the middle part of the upper surface of the lower disc.

[0009] Furthermore, a rubber pad is bonded to the lower surface of the upper disk and the upper surface of the lower disk, and a plurality of deformation holes are opened inside the rubber pad.

[0010] Furthermore, through grooves are provided on the upper surfaces of the base on both sides of the motor.

[0011] Furthermore, a filter screen 1 is installed on the inner side wall of the base, and the specification of the filter screen 1 is 300 meshes.

[0012] Furthermore, a through hole is opened on the left inner wall of the base below the first filter, a suction fan is installed on the inner wall of the through hole, and a second filter is fixedly connected to the inner wall of the through hole on the left side of the suction fan.

[0013] Furthermore, a sealing plate is hinged on the front side of the base, and a handle is fixedly connected to the outer surface of the sealing plate.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model discloses that when grinding the bicycle sprocket, the through hole in the middle of the sprocket can be inserted into the lower positioning column, and then the electric cylinder can be started to make the piston rod drive the upper connecting rod to move downward, and the upper connecting rod moving downward will drive the upper disc to move downward until the upper positioning column is inserted into the through hole in the middle of the sprocket, thereby positioning and clamping the sprocket, so as to grind the side of the bicycle sprocket. When it is necessary to grind different sides of the sprocket, the motor can be started to make the rotating shaft drive the lower connecting rod and the lower disc to rotate, thereby driving the sprocket to rotate, and the upper positioning column connected to the upper connecting rod through the bearing can keep the sprocket positioned and clamped when the sprocket rotates. Through the cooperation of the above structure, the sprocket can be positioned and clamped when the side of the bicycle sprocket is rotated and polished, thereby improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 For the utility model Figure 2 A magnified image of point A;

[0019] Figure 4 For the utility model Figure 2 Enlarged view of point B.

[0020] Markings in the figure: 1-base, 2-L-shaped plate, 3-motor, 4-rotating shaft, 5-lower connecting rod, 6-lower disc, 7-filter screen 1, 8-lower positioning column, 9-electric cylinder, 10-piston rod, 11-upper connecting rod, 12-upper disc, 13-rubber pad, 14-upper positioning column, 15-deformation hole, 16-through groove, 17-through hole, 18-suction fan, 19-filter screen 2, 20-sealing plate, 21-handle. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0022] Reference Figure 1-Figure 4 A bicycle sprocket positioning tool comprises a base 1, a motor 3 is fixedly connected to the middle part of the upper surface of the base 1, a rotating shaft 4 is installed at the upper surface output end of the motor 3, a lower connecting rod 5 is fixedly connected to the upper surface of the rotating shaft 4, a lower disc 6 is fixedly connected to the end of the lower connecting rod 5 away from the rotating shaft 4, and a lower positioning column 8 is fixedly connected to the middle part of the upper surface of the lower disc 6; specifically, when grinding the bicycle sprocket, the through hole in the middle part of the sprocket can be inserted into the lower positioning column 8.

[0023] Reference Figure 1-Figure 4 The left end of the upper surface of the base 1 is fixedly connected with an L-shaped plate 2, the middle part of the lower surface of the L-shaped plate 2 is fixedly connected with an electric cylinder 9, the output end of the lower surface of the electric cylinder 9 is installed with a piston rod 10, the lower surface of the piston rod 10 is fixedly connected with an upper connecting rod 11, the end of the upper connecting rod 11 away from the piston rod 10 is rotatably connected with an upper disc 12 through a bearing, and the middle part of the lower surface of the upper disc 12 is fixedly connected with an upper positioning column 14; specifically, starting the electric cylinder 9 can make the piston rod 10 drive the upper connecting rod 11 to move downward, and the downward moving upper connecting rod 11 will drive the upper disc 12 to move upward. The upper locating post 14 is moved downward until the upper locating post 14 is inserted into the through hole in the middle of the sprocket, thereby positioning and clamping the sprocket for grinding the side of the bicycle sprocket. When it is necessary to grind different sides of the sprocket, the motor 3 can be started to make the rotating shaft 4 drive the lower connecting rod 5 and the lower disc 6 to rotate, thereby driving the sprocket to rotate, and the upper locating post 14 connected to the upper connecting rod 11 through the bearing can keep the sprocket positioned and clamped when the sprocket rotates. Through the cooperation of the above structure, the sprocket can be kept positioned and clamped when the side of the bicycle sprocket is rotated and ground, thereby improving convenience.

[0024] Reference Figure 1-Figure 4 A rubber pad 13 is bonded to the lower surface of the upper disk 12 and the upper surface of the lower disk 6, and a plurality of deformation holes 15 are opened inside the rubber pad 13; specifically, the flexible rubber pad 13 can protect the upper and lower surfaces of the sprocket, and try to avoid damage to the sprocket surface caused by friction when the sprocket is rotated.

[0025] Reference Figure 1-Figure 4A through groove 16 is provided on the upper surface of the base 1 on both sides of the motor 3, and a filter screen 7 is installed on the inner wall of the base 1. The specification of the filter screen 7 is 300 meshes. A through hole 17 is provided on the left inner wall of the base 1 below the filter screen 7, and a suction fan 18 is installed on the inner wall of the through hole 17. A filter screen 19 is fixedly connected to the inner wall of the through hole 17 on the left side of the suction fan 18; specifically, when grinding the sprocket, the suction fan 18 can be started to pump the air inside the base 1. When the internal air of the base 1 is sucked away, the air pressure inside the base 1 will produce an air pressure difference with the external air pressure. At this time, the external air will drive the debris generated by the sprocket grinding into the base 1 through the through groove 16, and the debris entering the base 1 will fall to the upper surface of the filter screen 7.

[0026] Reference Figure 1-Figure 4 A sealing plate 20 is hinged on the front side of the base 1, and a handle 21 is fixedly connected to the outer surface of the sealing plate 20; specifically, when it is necessary to clean the debris on the upper surface of the filter screen 7, the sealing plate 20 can be opened by holding the handle 21 so as to centrally clean the debris.

[0027] The implementation principle of the bicycle sprocket positioning tool embodiment of the present application is as follows:

[0028] When using the positioning tool, first connect the external power supply, then the through hole in the middle of the bicycle sprocket can be inserted into the lower positioning column 8, and then the electric cylinder 9 can be started to make the piston rod 10 drive the upper connecting rod 11 to move downward, and the upper connecting rod 11 moving downward will drive the upper disc 12 to move downward until the upper positioning column 14 is inserted into the through hole in the middle of the sprocket, thereby positioning and clamping the sprocket for grinding the side of the bicycle sprocket. When it is necessary to grind different sides of the sprocket, the motor 3 can be started to make the rotating shaft 4 drive the lower connecting rod 5 and the lower disc 6 to rotate, thereby driving the sprocket to rotate, and the upper positioning column 14 connected to the upper connecting rod 11 through the bearing can maintain the positioning and clamping of the sprocket when the sprocket rotates; through the cooperation of the above structure, the positioning and clamping of the sprocket can be maintained when the side of the bicycle sprocket is rotated and polished, thereby improving convenience.

[0029] On the other hand, the flexible rubber pad 13 can protect the upper and lower surfaces of the sprocket, and try to avoid damage to the sprocket surface caused by friction when the sprocket is rotated; when grinding the sprocket, the suction fan 18 can be started to draw the air inside the base 1. When the internal air of the base 1 is sucked away, the air pressure inside the base 1 will produce an air pressure difference with the external air pressure. At this time, the external air will drive the debris generated by the grinding of the sprocket into the base 1 through the through groove 16, and the debris entering the base 1 will fall onto the upper surface of the filter 7; when it is necessary to clean the debris on the upper surface of the filter 7, the handle 21 can be held to open the sealing plate 20 so that the debris can be cleaned centrally.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bicycle sprocket positioning tool, comprising a base (1), characterized in that: An L-shaped plate (2) is fixedly connected to the left end of the upper surface of the base (1), an electric cylinder (9) is fixedly connected to the middle of the lower surface of the L-shaped plate (2), a piston rod (10) is mounted on the output end of the lower surface of the electric cylinder (9), an upper connecting rod (11) is fixedly connected to the lower surface of the piston rod (10), an end of the upper connecting rod (11) away from the piston rod (10) is rotatably connected to an upper disc (12) via a bearing, and an upper positioning column (14) is fixedly connected to the middle of the lower surface of the upper disc (12); A motor (3) is fixedly connected to the middle of the upper surface of the base (1); a rotating shaft (4) is installed at the output end of the upper surface of the motor (3); a lower connecting rod (5) is fixedly connected to the upper surface of the rotating shaft (4); an end of the lower connecting rod (5) away from the rotating shaft (4) is fixedly connected to a lower disc (6); and a lower positioning column (8) is fixedly connected to the middle of the upper surface of the lower disc (6); A rubber pad (13) is bonded to the lower surface of the upper disc (12) and the upper surface of the lower disc (6), and a plurality of deformation holes (15) are formed inside the rubber pad (13); Through grooves (16) are provided on the upper surfaces of the base (1) on both sides of the motor (3).

2. A bicycle sprocket positioning tool as claimed in claim 1, characterized in that: A filter screen 1 (7) is installed on the inner side wall of the base (1), and the specification of the filter screen 1 (7) is 300 meshes.

3. A bicycle sprocket positioning tool as claimed in claim 2, characterized in that: A through hole (17) is provided on the left inner wall of the base (1) below the first filter (7), a suction fan (18) is installed on the inner wall of the through hole (17), and a second filter (19) is fixedly connected to the inner wall of the through hole (17) on the left side of the suction fan (18).

4. The bicycle sprocket positioning tool as claimed in claim 1, characterized in that: A sealing plate (20) is hingedly connected to the front side of the base (1), and a handle (21) is fixedly connected to the outer surface of the sealing plate (20).

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