Auxiliary positioning device for bicycle crankset machining

Abstract

The utility model relates to an auxiliary positioning device for bicycle crankset processing, which comprises a positioning disc, an adjusting mechanism is arranged on the positioning disc, the adjusting mechanism comprises a first rectangular groove arranged on the upper surface of the positioning disc, a threaded rod is rotatably installed in an inner cavity of the first rectangular groove, the outer surface of the threaded rod is in threaded connection with a moving block, and the moving block is in threaded connection with the positioning disc. A moving strip is fixedly mounted at the top of the moving block, a second rectangular groove is formed in the upper surface of the moving strip, a positioning pin is movably mounted in the second rectangular groove, a rectangular cavity is formed in the positioning pin, and a spring is fixedly mounted on the side surface of an inner cavity of the rectangular cavity; connecting blocks are fixedly mounted at the ends, away from the side surfaces of the inner cavities of the rectangular cavities, of the springs. According to the auxiliary positioning device for bicycle crankset machining, by arranging the adjusting mechanism on the positioning disc, the position of the fixing pin can be adjusted according to different cranksets during use, so that the fixing pin can adapt to the cranksets of different specifications, and the positioning effect of the cranksets can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chainring processing, in particular to an auxiliary positioning device for processing a bicycle chainring. Background Art

[0002] The bicycle crankset is an important component on the bicycle, usually installed on the pedal shaft. It consists of multiple gears. The number and size of gears are different, which can provide different riding resistance and speed options. Riders can adapt to different road conditions and riding needs by changing the gear selection. Bicycle cranksets are usually composed of components such as sprockets, cranks and sprocket screws. They can be designed and manufactured according to different needs and uses. For example, the cranksets of mountain bikes and road bikes may have different designs and specifications. The processing of the crankset requires precise positioning and fixation to ensure its quality and performance.

[0003] When processing the crankset, it is necessary to position and fix the crankset. In the prior art, positioning pins are generally inserted into holes on the crankset to complete auxiliary positioning of the crankset. However, the positions of the fixing pins in the prior art are fixed. When fixing cranksets of different specifications, it is inconvenient to adjust the positions of the fixing pins, which can easily lead to the holes on the crankset not corresponding to the fixing pins, resulting in poor positioning effect. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides an auxiliary positioning device for bicycle chainring processing, which has the advantage of being easy to adjust the fixing pins, and solves the problem that in the prior art, when positioning the chainring, the positioning pins are generally inserted into the holes on the chainring to complete the auxiliary positioning of the chainring. However, the positions of the fixing pins in the prior art are fixed. When fixing chainrings of different specifications, it is not convenient to adjust the positions of the fixing pins, which can easily lead to the holes on the chainring and the fixing pins not corresponding to each other, resulting in a poor positioning effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an auxiliary positioning device for processing a bicycle crankset, comprising a positioning plate, on which an adjustment mechanism is provided;

[0006] The adjusting mechanism includes a first rectangular groove provided on the upper surface of the positioning plate, a threaded rod is rotatably installed in the inner cavity of the first rectangular groove, a moving block is threadedly connected to the outer surface of the threaded rod, a moving bar is fixedly installed on the top of the moving block, a second rectangular groove is provided on the upper surface of the moving bar, a positioning pin is movably installed in the second rectangular groove, a rectangular cavity is provided inside the positioning pin, a spring is fixedly installed on the inner side surface of the rectangular cavity, a connecting block is fixedly installed on one end of the spring away from the inner side surface of the rectangular cavity, a fixing pin that penetrates the outer surface of the rectangular cavity is fixedly installed on the side surface of the connecting block away from the spring, a fixing groove is provided on the inner side surface of the second rectangular groove, and a limiting mechanism is provided between the positioning pin and the second rectangular groove.

[0007] Furthermore, the cross-sectional shape of the moving block is the same as the cross-sectional shape of the first rectangular groove, and the outer surface of the moving block is in sliding contact with the inner surface of the first rectangular groove.

[0008] Furthermore, a rotating rod penetrating the side surface of the positioning plate is fixedly mounted on one end of the threaded rod, and a rotating block is fixedly mounted on one end of the rotating rod away from the threaded rod.

[0009] Furthermore, the limiting mechanism includes a strip limiting groove opened on the surface of the opposite side of the inner cavity of the second rectangular groove, and a limiting block inserted into the strip limiting groove is fixedly installed on the surface of the positioning pin, and the surface of the limiting block is in sliding contact with the inner surface of the strip limiting groove.

[0010] Furthermore, a pull rod penetrating the positioning pin and the movable bar is fixedly installed on the surface of the connecting block away from the fixing pin, the spring is sleeved on the outer surface of the pull rod, and a pull ring is fixedly installed on one end of the pull rod away from the connecting block.

[0011] Furthermore, a strip-shaped hole communicating with the inner cavity of the second rectangular groove is provided on the side surface of the moving strip, and the pull rod is located in the strip-shaped hole.

[0012] Furthermore, the number of the first rectangular grooves is three, and the three first rectangular grooves are evenly distributed on the surface of the positioning plate, and the number of the moving bars is adapted to the number of the first rectangular grooves.

[0013] Furthermore, the fixing pin is matched with the fixing slot, and the number of the fixing slots is multiple.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The auxiliary positioning device for bicycle chainring processing is provided with an adjustment mechanism on the positioning disk. When in use, the position of the fixing pin can be adjusted according to different chainrings, so that the fixing pin can adapt to chainrings of different specifications, which is beneficial to improving the positioning effect of the chainring. It solves the problem that when positioning the chainring in the prior art, the positioning pin is generally inserted into the hole on the chainring to complete the auxiliary positioning of the chainring, but the position of the fixing pin in the prior art is fixed. When fixing chainrings of different specifications, it is not convenient to adjust the position of the fixing pin, which easily leads to the hole on the chainring and the fixing pin not corresponding to each other, resulting in a poor positioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the appearance of the structural positioning plate of the utility model;

[0017] Figure 2 This is a schematic diagram of the upper surface of the positioning plate of the utility model structure;

[0018] Figure 3 This is a cross-sectional schematic diagram of the structural positioning disk of the utility model;

[0019] Figure 4 The utility model structure Figure 3 Enlarged schematic diagram at point A in the middle.

[0020] In the figure: 1, positioning plate; 2, first rectangular groove; 3, threaded rod; 4, moving block; 5, moving bar; 6, second rectangular groove; 7, fixing pin; 8, rectangular cavity; 9, spring; 10, connecting block; 11, fixing pin; 12, fixing groove; 13, rotating rod; 14, rotating block; 15, strip-shaped limiting groove; 16, limiting block; 17, pull rod; 18, pull ring; 19, strip-shaped hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0022] For example, see Figure 1-4In the present embodiment, an auxiliary positioning device for processing a bicycle crankshaft comprises a positioning plate 1, and an adjusting mechanism is arranged on the positioning plate 1. The adjusting mechanism comprises a first rectangular groove 2 opened on the upper surface of the positioning plate 1, and a threaded rod 3 is rotatably installed in the inner cavity of the first rectangular groove 2. A rotating rod 13 penetrating the side surface of the positioning plate 1 is fixedly installed at one end of the threaded rod 3, and a rotating block 14 is fixedly installed at one end of the rotating rod 13 away from the threaded rod 3, so as to facilitate the rotation of the threaded rod 3. A moving block 4 is threadedly connected to the outer surface of the threaded rod 3, and the cross-sectional shape of the moving block 4 is the same as that of the first rectangular groove 2. The outer surface of the moving block 4 is in sliding contact with the inner surface of the first rectangular groove 2, so as to facilitate the movement of the moving block 4 in the first rectangular groove 2. A moving bar 5 is fixedly installed on the top of the moving block 4. The number of the first rectangular grooves 2 is three, and the three first rectangular grooves 2 are evenly distributed on the surface of the positioning plate 1. The number of the moving bars 5 matches the number of the first rectangular grooves 2. A second rectangular groove 6 is provided on the upper surface of the moving bar 5, a positioning pin 7 is movably installed in the second rectangular groove 6, a rectangular cavity 8 is provided inside the positioning pin 7, a spring 9 is fixedly installed on the side surface of the inner cavity of the rectangular cavity 8, a connecting block 10 is fixedly installed on one end of the spring 9 away from the inner cavity of the rectangular cavity 8, a fixing pin 11 penetrating to the outer surface of the rectangular cavity 8 is fixedly installed on the surface of the connecting block 10 away from the spring 9, a pull rod 17 penetrating the positioning pin 7 and the moving bar 5 is fixedly installed on the surface of the connecting block 10 away from the fixing pin 11, the spring 9 is sleeved on the outer surface of the pull rod 17, a pull ring 18 is fixedly installed on one end of the pull rod 17 away from the connecting block 10, so as to facilitate pulling the fixing pin 11 to retract into the rectangular cavity 8, a strip hole 19 connected to the inner cavity of the second rectangular groove 6 is provided on the side surface of the moving bar 5, the pull rod 17 is located in the strip hole 19, so as to facilitate the movement of the pull rod 17 on the surface of the moving bar 5, and a fixing groove 12 is provided on the side surface of the inner cavity of the second rectangular groove 6;

[0023] A limiting mechanism is provided between the positioning pin 7 and the second rectangular groove 6, and the limiting mechanism includes a strip limiting groove 15 opened on the surface of the opposite side of the inner cavity of the second rectangular groove 6. A limiting block 16 inserted into the strip limiting groove 15 is fixedly installed on the surface of the positioning pin 7. The surface of the limiting block 16 is in sliding contact with the inner surface of the strip limiting groove 15, which helps to prevent the positioning pin 7 from escaping from the second rectangular groove 6.

[0024] The working principle of the above embodiment is:

[0025] When in use, the threaded rod 3 is rotated by the rotating block 14 and the rotating rod 13, and the threaded rod 3 is used to drive the moving block 4 to move in the first rectangular groove 2. At the same time, the moving bar 5 follows the moving block 4 to move synchronously, so that the positioning pin 7 can follow the moving bar 5 to move, and the positioning pin 7 can be moved away from or close to the center of the positioning disk 1. When the positioning pin 7 needs to be adjusted on the moving bar 5, the fixing pin 11 is pulled back into the rectangular cavity 8 through the pull ring 18 and the pull rod 17. At the same time, the connecting block 10 will compress the spring 9. At this time, the fixing pin 11 is separated from the fixing groove 12. At this time, the positioning pin 7 can be moved on the moving bar 5 along the direction of the second rectangular groove 6. When the positioning pin 7 needs to be fixed, the pull ring 18 and the pull rod 17 are released to restore the spring 9 to its original state and push the connecting block 10 to insert the fixing pin 11 into the fixing groove 12.

[0026] Embodiment 2, on the basis of embodiment 1, the fixing pin 11 is matched with the fixing slot 12 , and there are multiple fixing slots 12 , so that the fixing pin 11 can be easily inserted into the fixing slot 12 .

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary positioning device for processing a bicycle crankshaft, comprising a positioning plate (1), characterized in that: The positioning plate (1) is provided with an adjustment mechanism; The adjustment mechanism comprises a first rectangular groove (2) provided on the upper surface of the positioning plate (1); a threaded rod (3) is rotatably installed in the inner cavity of the first rectangular groove (2); a moving block (4) is threadedly connected to the outer surface of the threaded rod (3); a moving bar (5) is fixedly installed on the top of the moving block (4); a second rectangular groove (6) is provided on the upper surface of the moving bar (5); a positioning pin (7) is movably installed in the second rectangular groove (6); a rectangular cavity (8) is provided inside the positioning pin (7); a spring (9) is fixedly installed on the inner cavity side surface of the rectangular cavity (8); a connecting block (10) is fixedly installed on one end of the inner cavity side surface of the spring (9) away from the rectangular cavity (8); a fixing pin (11) penetrating to the outer surface of the rectangular cavity (8) is fixedly installed on the side surface of the connecting block (10) away from the spring (9); a fixing groove (12) is provided on the inner cavity side surface of the second rectangular groove (6); and a limiting mechanism is provided between the positioning pin (7) and the second rectangular groove (6).

2. The auxiliary positioning device for bicycle crankset processing according to claim 1, characterized in that: The cross-sectional shape of the moving block (4) is the same as the cross-sectional shape of the first rectangular groove (2), and the outer surface of the moving block (4) is in sliding contact with the inner surface of the first rectangular groove (2).

3. The auxiliary positioning device for bicycle crankset processing according to claim 1, characterized in that: A rotating rod (13) penetrating the side surface of the positioning plate (1) is fixedly mounted on one end of the threaded rod (3), and a rotating block (14) is fixedly mounted on one end of the rotating rod (13) away from the threaded rod (3).

4. The auxiliary positioning device for bicycle crankset processing according to claim 1, characterized in that: The limiting mechanism comprises a strip-shaped limiting groove (15) provided on a surface opposite to the inner cavity of the second rectangular groove (6); a limiting block (16) is fixedly mounted on the surface of the positioning pin (7) and inserted into the strip-shaped limiting groove (15); and a surface of the limiting block (16) is in sliding contact with an inner surface of the strip-shaped limiting groove (15).

5. The auxiliary positioning device for bicycle crankset processing according to claim 1, characterized in that: A pull rod (17) penetrating the positioning pin (7) and the movable bar (5) is fixedly mounted on the surface of the connecting block (10) at one side away from the fixing pin (11); the spring (9) is sleeved on the outer surface of the pull rod (17); and a pull ring (18) is fixedly mounted on one end of the pull rod (17) away from the connecting block (10).

6. The auxiliary positioning device for bicycle crankset processing according to claim 5, characterized in that: A strip-shaped hole (19) communicating with the inner cavity of the second rectangular groove (6) is provided on the side surface of the moving strip (5), and the pull rod (17) is located in the strip-shaped hole (19).

7. The auxiliary positioning device for bicycle crankset processing according to claim 1, characterized in that: The number of the first rectangular grooves (2) is three, and the three first rectangular grooves (2) are evenly distributed on the surface of the positioning plate (1), and the number of the moving strips (5) is adapted to the number of the first rectangular grooves (2).

8. The auxiliary positioning device for bicycle crankset processing according to claim 1, characterized in that: The fixing pin (11) is matched with the fixing slot (12), and the number of the fixing slots (12) is multiple.

Images